In vitro investigation of the anti-hyperglycemic and chemical composition of Heteromorpha arborescens (Spreng.) Cham leaf extracts used in the management of diabetes mellitus
- Abifarin, Taiwo Oluwafunmilola https://orcid.org/00000003-4994-4638
- Authors: Abifarin, Taiwo Oluwafunmilola https://orcid.org/00000003-4994-4638
- Date: 2021-09
- Subjects: Diabetes
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22798 , vital:52760
- Description: Diabetes mellitus is currently a major threat all over the world. It is a chronic disorder characterized by elevated blood glucose levels and disturbance in carbohydrate, fat and protein metabolism which often times leads to several complications such as, atherosclerosis, diabetic nephropathy, retinopathy and neuropathy. Due to the side effects associated with synthetic oral hypoglycemic drugs, herbal remedies have become the alternative in the management of diabetes mellitus. Heteromorpha arborescens is one of the many plants used as herbal remedies for the management of diabetes mellitus in South Africa. In addition, the roots, barks and leaves are used in other parts of Southern Africa for the treatment of mental problems, asthma, cough, dysentery and tuberculosis. The roots are fed to malnourished children in Botswana and Swaziland. However, despite the high medicinal importance, there is little or no scientificinformation to prove this claim. Therefore, the basis of this study is to determine the chemical composition as well as perform and invitro investigation of the antihyperglycemic potential of H. arborescens leaf extracts to provide information that could validate the ethno-medicinal claims for the use of this plant in the management of diabetes mellitus. Phytochemical contents and antioxidant activity of the leaf extracts were determined. Phytochemical analysis of the acetone, ethanol, aqueous and blanched extracts of H. arborescens leaves indicated that the total phenol content of the extracts ranged between 15.10 mg GAE/g- 42.50 mg QAE/g, proanthocyanidin, 459-8402.1 mg QE/g and the flavonoid content, 109.24- 235.79 mg QE/g. In addition, alkaloids (7.65percent) and saponin (25.33percent) were present in significantamounts. Based on the IC50 values, the ethanol extract exhibited the highest total antioxidant activity (0.0125 mg/mL) with highest inhibition against DPPH and ABTS radicals (0.06 and 0.049 mg/mL respectively). Relatively high antioxidant activity may be attributed to the polyphenolic contents which possess hypoglycemic potentials. Minimum Inhibitory Concentrations (MIC) of H. arborescens leaf extracts against Bacillus pumilus, Staphylococcus epidermidis, Staphylococcus aureus, Escherichia coli and Klebselia pneumoniae was also determined and results indicated considerable antibacterial activity in the acetone, ethanol and blanched extracts with MIC values ranging from 1.563-12.5 mg/mL; however, the aqueous extract was inactive against all the bacteria strains. The antibacterial activity of the leaf extracts could be advantageous against diabetic related infections. The cytotoxicity, anti-obesity and antidiabetic potentials of blanched, aqueous and ethanol extracts of Heteromorpha arborescens (Spreng.) Cham leaves were also investigated. The results revealed that both ethanol and aqueous extracts indicated considerable inhibition against α-glucosidase (IC50 of 627.29 ± 4.33 μg/mL and 576.46 ± 3.21 μg/mL respectively) while the blanched extract showed weak α- glucosidase inhibition (IC50; 855.38 ± 4.29 μg/mL). The aqueous extract showed the best α- amylase inhibition (IC50; 583.74 ± 5.87 μg/mL) among the assessed extracts. However, weak α- amylase inhibition was observed in the ethanol (IC50; 724.60 ± 4.33 μg/mL) and blanched extracts (IC50; 791.63 ± 3.76 μg/mL) of H. arborescens leaves. Some level of glucose utilization in both C3A and L6 cells was also observed for the aqueous and ethanol extracts which may be attributed to the relatively lower toxicity levels present in them, however, glucose utilization was very weak for the blanched extract, which may be due to higher level of cytotoxicity it possessed. Relatively weak lipase inhibition was observed for the ethanol (IC50; 699.3 ± 1.33 μg/mL), aqueous (IC50; 811.52 ± 3.52 μg/mL) and blanched extract (IC50; 1152.7 ± 4.61 μg/mL) as compared to orlistat (IC50; 56.88 ± 0.11 μg/mL). However, there was no reasonable reduction in lipid accumulation observed in all the extract treated cells. The results obtained suggest that H.arborescens leaf extracts can serve as a potential tool for the development of new strategies for the treatment of diabetes and obesity. However, further analysis is required to ascertain its anti- obesity potential. Also, caution should be taken in the use of the plant at high concentrations in order to ensure safety and efficacy. Analyses were also carried out to determine the nutritional and antinutritional constituents of the plant for possible inclusion in the diet of diabetic patients. Proximate analysis revealed the presence of 8.5 percent total ash, 4.92 percent crude fat, 8.41 percent moisture, 15.74 percent crude protein, 21.48 percent crude fiber, 40.95 percent carbohydrates and 271.04 kcal/100g energy value. Mineral analysis showed that H. arborescens leaves are very rich in K, Ca, and Fe. Considerable amounts of Mg, Mn, Na, P, Cu and Zn were also present. Vitamin analysis showed that the plant has a high content of vitamins A, C and E. The anti-nutrients evaluated were phytate, oxalate, saponin, and alkaloids, all of which were below toxic levels except for saponin which was observed in moderately high level. This study revealed that H. arborescens leaves are a good source of nutrients and mineral elements, (with low anti-nutrient content) that are highly beneficial to human health especially in diabetic individuals, therefore, encouraging its possible inclusion as a vegetable. Essential oil composition of fresh Heteromorphaarborescens leaves were also determined by Solvent-Free-Microwave-Extraction (SFME) and Hydrodistillation (HD) methods and the compositions of both mehods were compared in terms of their chemical compositions, yield, CO2 emission and energy consumption. Solvent Free Microwave extraction method indicated higher oil yield of 0.7 mL/200 g (0.35 percent) as compared to 0.59 mL/200 g (0.295 percent), lower energy consumption and CO2 emission as compared to the hydrodistillation method. In conclusion, H. arborescens leaves indicated considerable potential efficacy in the management for diabetes mellitus and may require further structural elucidation and characterization in order to identify the bioactive constituents. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-09
- Authors: Abifarin, Taiwo Oluwafunmilola https://orcid.org/00000003-4994-4638
- Date: 2021-09
- Subjects: Diabetes
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22798 , vital:52760
- Description: Diabetes mellitus is currently a major threat all over the world. It is a chronic disorder characterized by elevated blood glucose levels and disturbance in carbohydrate, fat and protein metabolism which often times leads to several complications such as, atherosclerosis, diabetic nephropathy, retinopathy and neuropathy. Due to the side effects associated with synthetic oral hypoglycemic drugs, herbal remedies have become the alternative in the management of diabetes mellitus. Heteromorpha arborescens is one of the many plants used as herbal remedies for the management of diabetes mellitus in South Africa. In addition, the roots, barks and leaves are used in other parts of Southern Africa for the treatment of mental problems, asthma, cough, dysentery and tuberculosis. The roots are fed to malnourished children in Botswana and Swaziland. However, despite the high medicinal importance, there is little or no scientificinformation to prove this claim. Therefore, the basis of this study is to determine the chemical composition as well as perform and invitro investigation of the antihyperglycemic potential of H. arborescens leaf extracts to provide information that could validate the ethno-medicinal claims for the use of this plant in the management of diabetes mellitus. Phytochemical contents and antioxidant activity of the leaf extracts were determined. Phytochemical analysis of the acetone, ethanol, aqueous and blanched extracts of H. arborescens leaves indicated that the total phenol content of the extracts ranged between 15.10 mg GAE/g- 42.50 mg QAE/g, proanthocyanidin, 459-8402.1 mg QE/g and the flavonoid content, 109.24- 235.79 mg QE/g. In addition, alkaloids (7.65percent) and saponin (25.33percent) were present in significantamounts. Based on the IC50 values, the ethanol extract exhibited the highest total antioxidant activity (0.0125 mg/mL) with highest inhibition against DPPH and ABTS radicals (0.06 and 0.049 mg/mL respectively). Relatively high antioxidant activity may be attributed to the polyphenolic contents which possess hypoglycemic potentials. Minimum Inhibitory Concentrations (MIC) of H. arborescens leaf extracts against Bacillus pumilus, Staphylococcus epidermidis, Staphylococcus aureus, Escherichia coli and Klebselia pneumoniae was also determined and results indicated considerable antibacterial activity in the acetone, ethanol and blanched extracts with MIC values ranging from 1.563-12.5 mg/mL; however, the aqueous extract was inactive against all the bacteria strains. The antibacterial activity of the leaf extracts could be advantageous against diabetic related infections. The cytotoxicity, anti-obesity and antidiabetic potentials of blanched, aqueous and ethanol extracts of Heteromorpha arborescens (Spreng.) Cham leaves were also investigated. The results revealed that both ethanol and aqueous extracts indicated considerable inhibition against α-glucosidase (IC50 of 627.29 ± 4.33 μg/mL and 576.46 ± 3.21 μg/mL respectively) while the blanched extract showed weak α- glucosidase inhibition (IC50; 855.38 ± 4.29 μg/mL). The aqueous extract showed the best α- amylase inhibition (IC50; 583.74 ± 5.87 μg/mL) among the assessed extracts. However, weak α- amylase inhibition was observed in the ethanol (IC50; 724.60 ± 4.33 μg/mL) and blanched extracts (IC50; 791.63 ± 3.76 μg/mL) of H. arborescens leaves. Some level of glucose utilization in both C3A and L6 cells was also observed for the aqueous and ethanol extracts which may be attributed to the relatively lower toxicity levels present in them, however, glucose utilization was very weak for the blanched extract, which may be due to higher level of cytotoxicity it possessed. Relatively weak lipase inhibition was observed for the ethanol (IC50; 699.3 ± 1.33 μg/mL), aqueous (IC50; 811.52 ± 3.52 μg/mL) and blanched extract (IC50; 1152.7 ± 4.61 μg/mL) as compared to orlistat (IC50; 56.88 ± 0.11 μg/mL). However, there was no reasonable reduction in lipid accumulation observed in all the extract treated cells. The results obtained suggest that H.arborescens leaf extracts can serve as a potential tool for the development of new strategies for the treatment of diabetes and obesity. However, further analysis is required to ascertain its anti- obesity potential. Also, caution should be taken in the use of the plant at high concentrations in order to ensure safety and efficacy. Analyses were also carried out to determine the nutritional and antinutritional constituents of the plant for possible inclusion in the diet of diabetic patients. Proximate analysis revealed the presence of 8.5 percent total ash, 4.92 percent crude fat, 8.41 percent moisture, 15.74 percent crude protein, 21.48 percent crude fiber, 40.95 percent carbohydrates and 271.04 kcal/100g energy value. Mineral analysis showed that H. arborescens leaves are very rich in K, Ca, and Fe. Considerable amounts of Mg, Mn, Na, P, Cu and Zn were also present. Vitamin analysis showed that the plant has a high content of vitamins A, C and E. The anti-nutrients evaluated were phytate, oxalate, saponin, and alkaloids, all of which were below toxic levels except for saponin which was observed in moderately high level. This study revealed that H. arborescens leaves are a good source of nutrients and mineral elements, (with low anti-nutrient content) that are highly beneficial to human health especially in diabetic individuals, therefore, encouraging its possible inclusion as a vegetable. Essential oil composition of fresh Heteromorphaarborescens leaves were also determined by Solvent-Free-Microwave-Extraction (SFME) and Hydrodistillation (HD) methods and the compositions of both mehods were compared in terms of their chemical compositions, yield, CO2 emission and energy consumption. Solvent Free Microwave extraction method indicated higher oil yield of 0.7 mL/200 g (0.35 percent) as compared to 0.59 mL/200 g (0.295 percent), lower energy consumption and CO2 emission as compared to the hydrodistillation method. In conclusion, H. arborescens leaves indicated considerable potential efficacy in the management for diabetes mellitus and may require further structural elucidation and characterization in order to identify the bioactive constituents. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-09
Investigation of pharmaceutical residues and polybrominated diphenyl ethers in selected river estuaries and canal in Eastern Cape Province, South Africa
- Ohoro, Chinemerem Ruth https://orcid.org/ 0000-0002-8167-6314
- Authors: Ohoro, Chinemerem Ruth https://orcid.org/ 0000-0002-8167-6314
- Date: 2021-09
- Subjects: Marine pharmacology
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21545 , vital:48878
- Description: The increasing global pollution by contaminants of emerging concern due to industrialization, development, and improper handling of industrial and domestic waste is alarming. Some of these emerging contaminants are endocrine disruptors and persistent organic pollutants. Two groups of compounds (pharmaceuticals and polybrominated diphenyl ethers (PBDEs)) were considered for this study. Pharmaceuticals are drugs which we take to cure and nourish human and animal bodies, ranging from antibiotics, stimulants, psychiatric, to hormonal recipes among others. They are potentially toxic and comprise chemicals or active ingredients capable of disrupting hormones. They have been related to human and aquatic organisms' ecological risks, such as feminization and masculinization of fish, cancer, and disruption of the immune system. In recent times, pharmaceuticals are being tested in the Rivers of South Africa. PBDEs are human influential chemicals usually incorporated into products such as flame retardants, which can travel over a long distance. They are hydrophobic, lipophilic, environmentally persistent, and easily absorbed by aquatic organisms. About 209 congeners exist, and BDE- 17, 47, 66, 100, 153, 154, and 183 are frequently detected in the environment. The higher brominated congeners can debrominate to more toxic and lower congeners. Though they have low acute toxicity, their effect of interfering with the thyroid gland is long-term. They pose a risk such as immunological, neurological, carcinogenicity, and reproductive disruption. Water and sediment samples considered for investigation were collected from five different sites (Buffalo River Estuary, Sundays River Estuary, Swartkops River Estuary, Nahoon River Estuary, and Markman Canal stormwater). These sites are located in the two major cities hosting the two major Ports (East London and Port Elizabeth) in the Eastern Cape Province of South Africa. Five sampling points were chosen for the collection of both water and sediment samples across three seasons that span from August to December in each of the mentioned sites. Nahoon River Estuary that was not sampled in winter seasons due to logistics and the global pandemic of year 2020; sediment sample was not collected at point NH5 for the spring season because of inaccessibility and topography of the sampling point. Ultrasonic extraction was utilized for sediment samples while SPE method with C-18 cartridges, was used to extract pharmaceuticals in water samples and for the purification of sediment extracts. A chromatographic column was employed for sediment purification. Analytes considered in this study were carbamazepine, caffeine, trimethoprim, sulfamethoxazole, and testosterone. Nahoon River Estuary and Markman canal were considered for investigation of water and sediments for PBDEs. The samples were processed for analysis immediately on arrival to the laboratory after being stored in an ice chest at 4 oC. Physicochemical properties of water samples were taken on site. The temperature ranges from 15.5-24.5 oC for Markman and 24.5- 26.6 oC. Nahoon River Estuary. There was a correlation among the congeners except for BDE-153, which do not correlate with BDE- 17, 47, and 183 in Markman. However, BDE- 153 correlated with BDE-66 in Markman. The Ʃ5PBDE for water and Ʃ6PBDE sediment for all seasons were BDL – 1357 ng/L and BDL – 408.14 ng/g, respectively. The PBDEs mean concentrations in Nahoon water samples ranges from BDL-247 ng/L (spring). The dominant congeners in Nahoon Estuary and Markman Canal samples were BDE- 17 and BDE – 66. The temperature and pH of Swartkops River Estuary range from 16.66 – 25.15 oC, and 8.1 – 10.4, respectively. The pH of the Estuary was higher than that of the Markman Canal. The concentrations of pharmaceuticals in water samples were below detection limit. However, carbamazepine gave the highest concentration in sediment samples (23.86 μg/kg). SLF was not detected in sediment samples. The range of temperature for Buffalo River Estuary was lower than the other sites (18.10 – 20.22 oC); however, the pH showed no difference. Human and ecotoxicological risks were estimated for Markman Canal, Nahoon, Swartkops, Buffalo and Sundays River estuaries. The concentrations obtained for the two classes of contaminants in this study showed that PBDEs in Markman Canal sediment could pose a potential risk to humans, while Nahoon River Estuary poses no risk from PBDEs. Furthermore, the concentrations of caffeine in surface water of Sundays Estuary indicates low ecotoxicological risk to aquatic organisms (fish). Also, carbamazepine and trimethoprim levels (BDL – 9.50 and 1.39-2.00 μg/kg, respectively) suggest a high risk to aquatic organisms (bacteria, invertebrate, algae) in sediment of Buffalo, Sundays, and Swartkops estuaries, as well as Markman Canal. The situation report shows that the estuaries and canal in East London and Port Elizabeth are polluted by organic pollutants such as pharmaceuticals and polybrominated diphenyl ethers. Measures has to be taken to monitor the pollution of these rivers that are of economic value to South Africa. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-09
- Authors: Ohoro, Chinemerem Ruth https://orcid.org/ 0000-0002-8167-6314
- Date: 2021-09
- Subjects: Marine pharmacology
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21545 , vital:48878
- Description: The increasing global pollution by contaminants of emerging concern due to industrialization, development, and improper handling of industrial and domestic waste is alarming. Some of these emerging contaminants are endocrine disruptors and persistent organic pollutants. Two groups of compounds (pharmaceuticals and polybrominated diphenyl ethers (PBDEs)) were considered for this study. Pharmaceuticals are drugs which we take to cure and nourish human and animal bodies, ranging from antibiotics, stimulants, psychiatric, to hormonal recipes among others. They are potentially toxic and comprise chemicals or active ingredients capable of disrupting hormones. They have been related to human and aquatic organisms' ecological risks, such as feminization and masculinization of fish, cancer, and disruption of the immune system. In recent times, pharmaceuticals are being tested in the Rivers of South Africa. PBDEs are human influential chemicals usually incorporated into products such as flame retardants, which can travel over a long distance. They are hydrophobic, lipophilic, environmentally persistent, and easily absorbed by aquatic organisms. About 209 congeners exist, and BDE- 17, 47, 66, 100, 153, 154, and 183 are frequently detected in the environment. The higher brominated congeners can debrominate to more toxic and lower congeners. Though they have low acute toxicity, their effect of interfering with the thyroid gland is long-term. They pose a risk such as immunological, neurological, carcinogenicity, and reproductive disruption. Water and sediment samples considered for investigation were collected from five different sites (Buffalo River Estuary, Sundays River Estuary, Swartkops River Estuary, Nahoon River Estuary, and Markman Canal stormwater). These sites are located in the two major cities hosting the two major Ports (East London and Port Elizabeth) in the Eastern Cape Province of South Africa. Five sampling points were chosen for the collection of both water and sediment samples across three seasons that span from August to December in each of the mentioned sites. Nahoon River Estuary that was not sampled in winter seasons due to logistics and the global pandemic of year 2020; sediment sample was not collected at point NH5 for the spring season because of inaccessibility and topography of the sampling point. Ultrasonic extraction was utilized for sediment samples while SPE method with C-18 cartridges, was used to extract pharmaceuticals in water samples and for the purification of sediment extracts. A chromatographic column was employed for sediment purification. Analytes considered in this study were carbamazepine, caffeine, trimethoprim, sulfamethoxazole, and testosterone. Nahoon River Estuary and Markman canal were considered for investigation of water and sediments for PBDEs. The samples were processed for analysis immediately on arrival to the laboratory after being stored in an ice chest at 4 oC. Physicochemical properties of water samples were taken on site. The temperature ranges from 15.5-24.5 oC for Markman and 24.5- 26.6 oC. Nahoon River Estuary. There was a correlation among the congeners except for BDE-153, which do not correlate with BDE- 17, 47, and 183 in Markman. However, BDE- 153 correlated with BDE-66 in Markman. The Ʃ5PBDE for water and Ʃ6PBDE sediment for all seasons were BDL – 1357 ng/L and BDL – 408.14 ng/g, respectively. The PBDEs mean concentrations in Nahoon water samples ranges from BDL-247 ng/L (spring). The dominant congeners in Nahoon Estuary and Markman Canal samples were BDE- 17 and BDE – 66. The temperature and pH of Swartkops River Estuary range from 16.66 – 25.15 oC, and 8.1 – 10.4, respectively. The pH of the Estuary was higher than that of the Markman Canal. The concentrations of pharmaceuticals in water samples were below detection limit. However, carbamazepine gave the highest concentration in sediment samples (23.86 μg/kg). SLF was not detected in sediment samples. The range of temperature for Buffalo River Estuary was lower than the other sites (18.10 – 20.22 oC); however, the pH showed no difference. Human and ecotoxicological risks were estimated for Markman Canal, Nahoon, Swartkops, Buffalo and Sundays River estuaries. The concentrations obtained for the two classes of contaminants in this study showed that PBDEs in Markman Canal sediment could pose a potential risk to humans, while Nahoon River Estuary poses no risk from PBDEs. Furthermore, the concentrations of caffeine in surface water of Sundays Estuary indicates low ecotoxicological risk to aquatic organisms (fish). Also, carbamazepine and trimethoprim levels (BDL – 9.50 and 1.39-2.00 μg/kg, respectively) suggest a high risk to aquatic organisms (bacteria, invertebrate, algae) in sediment of Buffalo, Sundays, and Swartkops estuaries, as well as Markman Canal. The situation report shows that the estuaries and canal in East London and Port Elizabeth are polluted by organic pollutants such as pharmaceuticals and polybrominated diphenyl ethers. Measures has to be taken to monitor the pollution of these rivers that are of economic value to South Africa. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-09
Participation of smallholder farmers in the production of high-value commodities: The case of smallholder tobacco farmers in
- Authors: Mugande, Unity
- Date: 2021-09
- Subjects: Farms, Small -- Zimbabwe , Sustainable development -- Zimbabwe
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21533 , vital:48864
- Description: Participation in the production of high-value export commodities is important in increasing incomes and in enhancing smallholder farmers’ livelihoods. However, the level of their participation may be limited by several factors. Despite the limiting factors, smallholder tobacco farming has gained popularity, especially for the Zimbabwean tobacco industry. Since the Fast Track Land Reform Programme (FTLRP), the tobacco industry in Zimbabwe has seen an influx of smallholder farmers who have since dominated the industry producing over half of the national total tobacco output. The participation by smallholder farmers in tobacco production can be influenced by many factors, the main being income realisation. However, for farmers to realise reasonable incomes, they should be able to produce reasonable levels of good quality tobacco otherwise their farming would be in vain. It has been shown in the literature that smallholder farmers can be constrained by several factors to produce high levels of produce and these factors may include one or more of the following; lack of capital, lack of productive assets, lack of tobacco production skills, lack of financial resources to finance productive activities properly, lack of access to land to expand production among others. Given this background, this study sought to assess the participation of smallholder farmers in tobacco production in terms of quantities and qualities produced given the differences in their productive capacities. The study utilised both primary and secondary data for analysis. Primary data were collected from individual farmers and contract firms’ representatives. The unit of analysis was the smallholder farmer. Primary data were collected through structured questionnaires and a semi-structured interview guide for the contract representatives. Secondary data for the 2018 season were obtained from TIMB. Descriptive statistics, binary logistic regression analysis and multiple linear regression analysis were used to analyse the data. The descriptive statistics results showed that; the majority of the tobacco farmers had low levels of education and they relied mainly on farm incomes for survival. Concerning farm assets, the results showed that; on average, farmers own at least one of the following traditional assets; plough, scotch cart, cattle, storage facility, tobacco curing barn, (athough among the farmers some had indicated that they do not own curing facilities but used hired facilities to cure tobacco). Modern assets like tractors, ox-drawn ridgers and truck motor vehicles were owned by only a few farmers. The results further showed that contracted farmers were more productive and produced better quality tobacco than independent tobacco producers. The binary regression results showed that Ox-drawn ridgers, ploughs, having had a contract before, pricing, distance to the market, age of the farmer, type of curing facility, number of extension visits, number of bales produced and access to credit were significant factors influencing farmers’ participation in contract farming. However, four of the tested factors; tractors, cattle, number of hectares utilised for tobacco farming and number of years in tobacco farming were insignificant in influencing participation in contract farming. The results from the multiple linear regression analysis showed that the number of hectares utilised, the number of bales produced, market preferred, household size, tobacco production training, tractors, and type of curing facility were significant factors influencing the quality of tobacco produce. The other four variables that were tested; farmer category, type of energy used, being a member of a peer group and the number of years in tobacco farming; had no significant effect on the quality of tobacco produced by smallholder farmers. The study recommended that farmers should try and invest in commercial assets such as tractors, modern curing facilities, irrigation systems and other modern equipment that have potential to highly boost production rather than traditional assets like ox-drawn ploughs. The study also recommended that farmers should aim at maximising quantity per hectare of tobacco planted rather than planting larger crop areas they are unable to finance properly. Finally, it is recommended that farmers should get training on tobacco grading to avoid product quality loses that come with improper grading. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-09
- Authors: Mugande, Unity
- Date: 2021-09
- Subjects: Farms, Small -- Zimbabwe , Sustainable development -- Zimbabwe
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21533 , vital:48864
- Description: Participation in the production of high-value export commodities is important in increasing incomes and in enhancing smallholder farmers’ livelihoods. However, the level of their participation may be limited by several factors. Despite the limiting factors, smallholder tobacco farming has gained popularity, especially for the Zimbabwean tobacco industry. Since the Fast Track Land Reform Programme (FTLRP), the tobacco industry in Zimbabwe has seen an influx of smallholder farmers who have since dominated the industry producing over half of the national total tobacco output. The participation by smallholder farmers in tobacco production can be influenced by many factors, the main being income realisation. However, for farmers to realise reasonable incomes, they should be able to produce reasonable levels of good quality tobacco otherwise their farming would be in vain. It has been shown in the literature that smallholder farmers can be constrained by several factors to produce high levels of produce and these factors may include one or more of the following; lack of capital, lack of productive assets, lack of tobacco production skills, lack of financial resources to finance productive activities properly, lack of access to land to expand production among others. Given this background, this study sought to assess the participation of smallholder farmers in tobacco production in terms of quantities and qualities produced given the differences in their productive capacities. The study utilised both primary and secondary data for analysis. Primary data were collected from individual farmers and contract firms’ representatives. The unit of analysis was the smallholder farmer. Primary data were collected through structured questionnaires and a semi-structured interview guide for the contract representatives. Secondary data for the 2018 season were obtained from TIMB. Descriptive statistics, binary logistic regression analysis and multiple linear regression analysis were used to analyse the data. The descriptive statistics results showed that; the majority of the tobacco farmers had low levels of education and they relied mainly on farm incomes for survival. Concerning farm assets, the results showed that; on average, farmers own at least one of the following traditional assets; plough, scotch cart, cattle, storage facility, tobacco curing barn, (athough among the farmers some had indicated that they do not own curing facilities but used hired facilities to cure tobacco). Modern assets like tractors, ox-drawn ridgers and truck motor vehicles were owned by only a few farmers. The results further showed that contracted farmers were more productive and produced better quality tobacco than independent tobacco producers. The binary regression results showed that Ox-drawn ridgers, ploughs, having had a contract before, pricing, distance to the market, age of the farmer, type of curing facility, number of extension visits, number of bales produced and access to credit were significant factors influencing farmers’ participation in contract farming. However, four of the tested factors; tractors, cattle, number of hectares utilised for tobacco farming and number of years in tobacco farming were insignificant in influencing participation in contract farming. The results from the multiple linear regression analysis showed that the number of hectares utilised, the number of bales produced, market preferred, household size, tobacco production training, tractors, and type of curing facility were significant factors influencing the quality of tobacco produce. The other four variables that were tested; farmer category, type of energy used, being a member of a peer group and the number of years in tobacco farming; had no significant effect on the quality of tobacco produced by smallholder farmers. The study recommended that farmers should try and invest in commercial assets such as tractors, modern curing facilities, irrigation systems and other modern equipment that have potential to highly boost production rather than traditional assets like ox-drawn ploughs. The study also recommended that farmers should aim at maximising quantity per hectare of tobacco planted rather than planting larger crop areas they are unable to finance properly. Finally, it is recommended that farmers should get training on tobacco grading to avoid product quality loses that come with improper grading. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-09
The escalation of gender war within post-colonial South African society: an interrogation of beauty’s gift by Sindiwe Magona, happiness is a four-letter word by Cynthia Jele and black widow society by Angela Makholwa
- Authors: Goremusandu, Tania
- Date: 2021-09
- Subjects: Women and literature -- Africa , Women in literature
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21927 , vital:51843
- Description: The critical analysis of gender war in the African context is not a new venture but it is rather a significant discussion to the development of gender and feminist theories. The primary focus of this study is to investigate the limitations to empowerment that African women face at the hands of a post-colonial patriarchal society like South Africa, exacerbated by the oppression and subjugation employed by patriarchal and cultural norms. Thus, the research provides a comparative analysis of three contemporary novels by award winning South African women writers in African literature: Sindiwe Magona, Cynthia Jele and Angela Makholwa. These three dedicated women writers examine the different ways in which African patriarchy and culture oppress professional, educated women. Their work portray gender and / or female oppression and the stereotypes experienced by African women in the context of post-colonial, heavily patriarchal South African society. Therefore, this study interrogates the experience of South African women, as explored in the texts, revealing the literary expressions of gender oppression as well as the possibilities of empowerment. In addition, the texts are analysed through the lens of the Feminist literary criticism theory, Gender studies and African feminism. Through the examination offered by these theories, the study focuses on the experiences of South African women, as expressed by the female characters in the selected texts, through a critical analysis of female oppression and resistance and on the idea that gender is constructed socially and culturally in the African context. As this project reveals, the problem arising within post-colonial South African society is that women are still oppressed and are seen as passive and submissive. As a result, patriarchal perspectives combined with women’s economic dependence on men, make reaching self-actualization a challenging and even terrifying experience, and is often impossible for most women to achieve. Thus, there is a need to understand the experiences of these women so that effective and culturally sensitive interventions can be implemented. The emergence of these renowned female South African writers together with the emancipation of African countries from colonial supremacy has opened a space for women to compensate for and correct the stereotyped female images in African literature and in post-colonial societies. Most contemporary African writers such as Chimamanda Ngozi Adichie, Tsitsi Dangarembga, Neshani Andreas, Sindiwe Magona, Cynthia Jele and Angela Makholwa have shown that women are seeking empowerment and liberation. Therefore, this study seeks to highlight such experiences through its critical interrogation of the writings of selected South African women writers and the exploration of their gender-based themes in order to inform and or inspire women empowerment. It is intended to broaden and encourage further academic discussion in the fields of Feminism literary criticism, Gender studies and African feminism as well as women’s literature within the African context. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-09
- Authors: Goremusandu, Tania
- Date: 2021-09
- Subjects: Women and literature -- Africa , Women in literature
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21927 , vital:51843
- Description: The critical analysis of gender war in the African context is not a new venture but it is rather a significant discussion to the development of gender and feminist theories. The primary focus of this study is to investigate the limitations to empowerment that African women face at the hands of a post-colonial patriarchal society like South Africa, exacerbated by the oppression and subjugation employed by patriarchal and cultural norms. Thus, the research provides a comparative analysis of three contemporary novels by award winning South African women writers in African literature: Sindiwe Magona, Cynthia Jele and Angela Makholwa. These three dedicated women writers examine the different ways in which African patriarchy and culture oppress professional, educated women. Their work portray gender and / or female oppression and the stereotypes experienced by African women in the context of post-colonial, heavily patriarchal South African society. Therefore, this study interrogates the experience of South African women, as explored in the texts, revealing the literary expressions of gender oppression as well as the possibilities of empowerment. In addition, the texts are analysed through the lens of the Feminist literary criticism theory, Gender studies and African feminism. Through the examination offered by these theories, the study focuses on the experiences of South African women, as expressed by the female characters in the selected texts, through a critical analysis of female oppression and resistance and on the idea that gender is constructed socially and culturally in the African context. As this project reveals, the problem arising within post-colonial South African society is that women are still oppressed and are seen as passive and submissive. As a result, patriarchal perspectives combined with women’s economic dependence on men, make reaching self-actualization a challenging and even terrifying experience, and is often impossible for most women to achieve. Thus, there is a need to understand the experiences of these women so that effective and culturally sensitive interventions can be implemented. The emergence of these renowned female South African writers together with the emancipation of African countries from colonial supremacy has opened a space for women to compensate for and correct the stereotyped female images in African literature and in post-colonial societies. Most contemporary African writers such as Chimamanda Ngozi Adichie, Tsitsi Dangarembga, Neshani Andreas, Sindiwe Magona, Cynthia Jele and Angela Makholwa have shown that women are seeking empowerment and liberation. Therefore, this study seeks to highlight such experiences through its critical interrogation of the writings of selected South African women writers and the exploration of their gender-based themes in order to inform and or inspire women empowerment. It is intended to broaden and encourage further academic discussion in the fields of Feminism literary criticism, Gender studies and African feminism as well as women’s literature within the African context. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-09
Agro-morphological characterisation, nitrogen use efficiency and combining ability of quality protein maize (zea mays l.) genotypes for low nitrogen tolerance
- AdeOluwa, Olusola Oluyinka https://orcid.org/ 0000-0003-2145-7141
- Authors: AdeOluwa, Olusola Oluyinka https://orcid.org/ 0000-0003-2145-7141
- Date: 2021-08
- Subjects: Corn -- Quality
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21501 , vital:48855 , http://id.loc.gov/authorities/subjects/sh85032715
- Description: Low nitrogen stress tolerant Quality Protein Maize (QPM) genotypes will be of great benefit to farmers for increasing productivity in nitrogen depleted soils in the Eastern Cape (EC) Province, South Africa (SA). The current study evaluated: (i) QPM inbred lines for tolerance to low soil nitrogen, (ii) the Nitrogen Use Efficiency (NUE) of different QPM inbred lines, (iii) the combining ability of QPM genotypes for tolerance to low nitrogen, grain yield, and other agro-morphological traits, and (iv) the agro-morphological characteristics and adaptation of QPM hybrids to environments of different production potential in the Eastern Cape, South Africa. Thirty-two white-seeded QPM inbred lines obtained from CIMMYT-Zimbabwe and Quality Seeds (PTY) LTD were evaluated for tolerance to low soil nitrogen stress using two nitrogen (N) treatment levels: 0 kg N ha-1 and 30 kg N ha-1 under both glasshouse and field conditions at the Crop Research farm, University of Fort Hare, in two planting seasons. The study aimed at assessing the response of QPM inbred lines to low N, with a view to identifying low N tolerant types under both glasshouse and field conditions. Shoot length stress tolerance index (SHL STI) indicated lines L23, L29, L27, L13, L16, L17, L31, L14, L18 and L22 to be low soil N tolerant from the glasshouse study. From the field study, low N Stress Tolerance Index (STI) identified inbred lines L23, L31, L26, L28, L25, L29, L32, L4, L6, L3 and L2 as low soil N tolerant. These inbred lines also had high grain yields (GY) in the field under 0 kg N ha-1 (all ranked within the top ten except L2). They also had the potential for stable yields across environments considering their high Yield Stability Index (YSI), Mean Productivity (MP), Geometric Mean Productivity (GMP) and Stress Susceptibility Index (SSI) values. Both the glasshouse and field studies revealed inbred lines L22, L23, L26, L28, L25, L29 and L31 were common to both the glasshouse and field studies as being low soil N tolerant. These thirty-two parental QPM inbred lines were evaluated in the field for their nitrogen use efficiency (NUE) under five different nitrogen levels: 0, 30, 60, 90 and 120 kg N ha-1. The inbred lines studied under 0 kg N ha-1 and 30 kg N ha-1 indicated that N level expressed highly significant differences (P ≤ 0.001) for total nitrogen in biomass (Bio Total N), total nitrogen in grain (G Total N), grain yield (GY), nitrogen use efficiency (NUE) and almost all the indices estimated. The top six nutrient use efficient genotypes were L9, L14, L23, L25, L29 and L32 across N levels. However, the best and highest NUE was obtained from the lowest fertilizer dose, 30 kg N ha-1. Highly significant and positive correlation coefficients were found between Nitrogen Use Efficiency (NUE) and yield (+0.9), NUE and NUtE (+0.9), NUE and HI (Harvest Index) (+0.5), NUtE and yield (+0.99), HI and yield (+0.5) and NUtE and HI (+0.5). Thus, NUE, HI and NUtE could be good predictors of yield potential under low N soil conditions. Sixty-four testcross hybrids were generated from crossing these 32 QPM inbred lines with two QPM open pollinated varieties (OPVs) as testers in a line x tester design and were evaluated under 0 kg N ha-1 and 30 kg N ha-1 in the field. The objectives of the experiment were to: (i) identify high yielding hybrids with tolerance to low soil N in the EC; (ii) determine the combining abilities and mode of gene action for various traits under low and high nitrogen conditions; and (iii) group the inbred lines into heterotic groups for future use in the breeding program. Results revealed that under 30 kg N ha-1 (30N) condition, both additive and non-additive gene effects were observed with less importance of non-additive gene action for grain yield. Based on specific combining ability (SCA) effects, hybrids LNC22, LNC31, LOB22, LNC30, LNC29, LOB11, LNC18, LOB30, LOB19 and LNC24 showed outstanding performance under 0 kg N ha-1 (0N) condition with relatively acceptable SCA under 30N for yield. Inbred lines L6 (1.63), L22 (1.74), L29 (1.83) and L30 (1.24) showed positive and significant GCAs for grain yield under 0N. They were identified as the best combiners for grain yield as they were among the top ten performers for GCA under 0N. They can be very useful sources of low N tolerance genes. Two heterotic groups were formed under 0 kg N ha-1 and 30 kg N ha-1 conditions, and they will be useful for future hybrid development in the breeding program. Furthermore, these thirty-two QPM inbred lines were utilised as parental lines to generate seventy-six single cross hybrids. These single cross hybrids were evaluated across three environments of varying production potential in the Eastern Cape (EC), during the 2016/17 and 2017/18 summer seasons. Non-QPM hybrids namely PAN5Q649R and Phb31MO7BR, as well as QPM OPVs OBATANPA and Nelson's Choice were included in these preliminary variety trials (PVTs) as checks. Twenty-five hybrids expressing high values for the Smith – Hazel selection index were identified across sites over years. Among those hybrids were two checks, namely Q16 (PAN5Q649R) and Q33 (Phb31MO7BR). The top five high – yielding hybrids selected based on the selection index were considered to be the most productive, stable and adaptable based on the GGE biplot and AMMI stability values. None of these single cross hybrids over yielded the best hybrid check (Q16) in the current study. A high potential environment, Centane, was the ideal environments for evaluating genotypes in the present study. The studies showed inbred lines L22, L23, L26, L28, L25, L29 and L31 to be low N stress tolerant at 0 kg N ha-1 based on the low N stress tolerance indices under glasshouse and the field conditions; they were also among the top ten grain-yielders under field conditions at 0 kg N ha-1. Also, in the NUE study, they were found to be among the top ten most N-efficient inbred lines under low N soils, under 30 kg N ha-1, and were among the top twenty-four inbred lines with high NUE values across the N levels in the study. Inbred lines L29 and L22 also produced testcross hybrids that were among the top twenty based on GY under 0 kg N ha-1. The testcross hybrids produced from these inbred lines were also among the top twenty-five with outstanding SCA effects for GY. These inbred lines were also parental lines of some of the top twenty- five best hybrids selected based on the Smith – Hazel selection index in the PVT study. Inbred lines L22, L23, L26, L28, L25, L29 and L31 can therefore further be evaluated and used as sources of N-tolerance genes in QPM breeding programs. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-08
- Authors: AdeOluwa, Olusola Oluyinka https://orcid.org/ 0000-0003-2145-7141
- Date: 2021-08
- Subjects: Corn -- Quality
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21501 , vital:48855 , http://id.loc.gov/authorities/subjects/sh85032715
- Description: Low nitrogen stress tolerant Quality Protein Maize (QPM) genotypes will be of great benefit to farmers for increasing productivity in nitrogen depleted soils in the Eastern Cape (EC) Province, South Africa (SA). The current study evaluated: (i) QPM inbred lines for tolerance to low soil nitrogen, (ii) the Nitrogen Use Efficiency (NUE) of different QPM inbred lines, (iii) the combining ability of QPM genotypes for tolerance to low nitrogen, grain yield, and other agro-morphological traits, and (iv) the agro-morphological characteristics and adaptation of QPM hybrids to environments of different production potential in the Eastern Cape, South Africa. Thirty-two white-seeded QPM inbred lines obtained from CIMMYT-Zimbabwe and Quality Seeds (PTY) LTD were evaluated for tolerance to low soil nitrogen stress using two nitrogen (N) treatment levels: 0 kg N ha-1 and 30 kg N ha-1 under both glasshouse and field conditions at the Crop Research farm, University of Fort Hare, in two planting seasons. The study aimed at assessing the response of QPM inbred lines to low N, with a view to identifying low N tolerant types under both glasshouse and field conditions. Shoot length stress tolerance index (SHL STI) indicated lines L23, L29, L27, L13, L16, L17, L31, L14, L18 and L22 to be low soil N tolerant from the glasshouse study. From the field study, low N Stress Tolerance Index (STI) identified inbred lines L23, L31, L26, L28, L25, L29, L32, L4, L6, L3 and L2 as low soil N tolerant. These inbred lines also had high grain yields (GY) in the field under 0 kg N ha-1 (all ranked within the top ten except L2). They also had the potential for stable yields across environments considering their high Yield Stability Index (YSI), Mean Productivity (MP), Geometric Mean Productivity (GMP) and Stress Susceptibility Index (SSI) values. Both the glasshouse and field studies revealed inbred lines L22, L23, L26, L28, L25, L29 and L31 were common to both the glasshouse and field studies as being low soil N tolerant. These thirty-two parental QPM inbred lines were evaluated in the field for their nitrogen use efficiency (NUE) under five different nitrogen levels: 0, 30, 60, 90 and 120 kg N ha-1. The inbred lines studied under 0 kg N ha-1 and 30 kg N ha-1 indicated that N level expressed highly significant differences (P ≤ 0.001) for total nitrogen in biomass (Bio Total N), total nitrogen in grain (G Total N), grain yield (GY), nitrogen use efficiency (NUE) and almost all the indices estimated. The top six nutrient use efficient genotypes were L9, L14, L23, L25, L29 and L32 across N levels. However, the best and highest NUE was obtained from the lowest fertilizer dose, 30 kg N ha-1. Highly significant and positive correlation coefficients were found between Nitrogen Use Efficiency (NUE) and yield (+0.9), NUE and NUtE (+0.9), NUE and HI (Harvest Index) (+0.5), NUtE and yield (+0.99), HI and yield (+0.5) and NUtE and HI (+0.5). Thus, NUE, HI and NUtE could be good predictors of yield potential under low N soil conditions. Sixty-four testcross hybrids were generated from crossing these 32 QPM inbred lines with two QPM open pollinated varieties (OPVs) as testers in a line x tester design and were evaluated under 0 kg N ha-1 and 30 kg N ha-1 in the field. The objectives of the experiment were to: (i) identify high yielding hybrids with tolerance to low soil N in the EC; (ii) determine the combining abilities and mode of gene action for various traits under low and high nitrogen conditions; and (iii) group the inbred lines into heterotic groups for future use in the breeding program. Results revealed that under 30 kg N ha-1 (30N) condition, both additive and non-additive gene effects were observed with less importance of non-additive gene action for grain yield. Based on specific combining ability (SCA) effects, hybrids LNC22, LNC31, LOB22, LNC30, LNC29, LOB11, LNC18, LOB30, LOB19 and LNC24 showed outstanding performance under 0 kg N ha-1 (0N) condition with relatively acceptable SCA under 30N for yield. Inbred lines L6 (1.63), L22 (1.74), L29 (1.83) and L30 (1.24) showed positive and significant GCAs for grain yield under 0N. They were identified as the best combiners for grain yield as they were among the top ten performers for GCA under 0N. They can be very useful sources of low N tolerance genes. Two heterotic groups were formed under 0 kg N ha-1 and 30 kg N ha-1 conditions, and they will be useful for future hybrid development in the breeding program. Furthermore, these thirty-two QPM inbred lines were utilised as parental lines to generate seventy-six single cross hybrids. These single cross hybrids were evaluated across three environments of varying production potential in the Eastern Cape (EC), during the 2016/17 and 2017/18 summer seasons. Non-QPM hybrids namely PAN5Q649R and Phb31MO7BR, as well as QPM OPVs OBATANPA and Nelson's Choice were included in these preliminary variety trials (PVTs) as checks. Twenty-five hybrids expressing high values for the Smith – Hazel selection index were identified across sites over years. Among those hybrids were two checks, namely Q16 (PAN5Q649R) and Q33 (Phb31MO7BR). The top five high – yielding hybrids selected based on the selection index were considered to be the most productive, stable and adaptable based on the GGE biplot and AMMI stability values. None of these single cross hybrids over yielded the best hybrid check (Q16) in the current study. A high potential environment, Centane, was the ideal environments for evaluating genotypes in the present study. The studies showed inbred lines L22, L23, L26, L28, L25, L29 and L31 to be low N stress tolerant at 0 kg N ha-1 based on the low N stress tolerance indices under glasshouse and the field conditions; they were also among the top ten grain-yielders under field conditions at 0 kg N ha-1. Also, in the NUE study, they were found to be among the top ten most N-efficient inbred lines under low N soils, under 30 kg N ha-1, and were among the top twenty-four inbred lines with high NUE values across the N levels in the study. Inbred lines L29 and L22 also produced testcross hybrids that were among the top twenty based on GY under 0 kg N ha-1. The testcross hybrids produced from these inbred lines were also among the top twenty-five with outstanding SCA effects for GY. These inbred lines were also parental lines of some of the top twenty- five best hybrids selected based on the Smith – Hazel selection index in the PVT study. Inbred lines L22, L23, L26, L28, L25, L29 and L31 can therefore further be evaluated and used as sources of N-tolerance genes in QPM breeding programs. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-08
Comparative performance of 3-kWp ranges Solar Photovoltaic Systems under varying meteorological conditions in Alice, Eastern Cape Province, South Africa
- Apeh, Oliver Okechukwu https://orcid.org/0000-0003-4076-0613
- Authors: Apeh, Oliver Okechukwu https://orcid.org/0000-0003-4076-0613
- Date: 2021-08
- Subjects: Photovoltaic power systems , Solar energy
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21567 , vital:48888
- Description: PVsystem has recently emerged in South Africa as a way to curb the country’s persistent shortage of electricity. A wide effort for the past few decades have targeted at study, testing and demonstration of PV power systems which was established all over the country as an appropriate measure to tackle transportation, agriculture, industry, commercial as well as domestic activities. In view of these drives, both off-grid and grid-connected PV systems are being applied. However, operating a building with an off-grid system is one of the means to providing the possibility of energy access to places far away from the national grid. As an off-grid choice, 50 W SHS is being distributed to customers in distant rustic parts of the country where grid option is difficult to access. But the SHS of the stated capacity can barely generate 0.3 to 0.4 kWh of electric energy per day, even at the optimal solar radiations. In view of this, more efforts are directed at expanding the off-grid systems to accommodate large rural households in South Africa. This thesis is dedicated to a study on the various configurations and components of PV power plant as a way to enhance electricity generations in South Africa. To this effect, different power plants were considered at SolarWatt park, University of Fort Hare with the aim to conduct a comparative analysis of the charge controllers with respect to the charge and discharge rates of their respective batteries. The grid-connected PV power generation was classified into hybrid PV and grid-assisted PV, while off-grid is a BIPV. These power plants generations were installed for the purpose of research level with a total capacity of 11.4 kW. The off-grid system is made up of HIT modules, FlexMax80 charge controller, Victron energy inverter and M-Molar battery bank. The hybrid and grid-assisted systems each consist of 15 polycrystalline modules and Microcare charge controllers. In addition, hybrid comprises SMA Sunny Island inverter and Trojan battery bank whereas grid-assisted consist of Microcare inverter and Hoppercke battery bank. The first part of the experimental work was monitored, and the meteorological parameters which are ambient temperature, solar radiation, relative humidity and wind speed, were measured and evaluated while electrical parameters includes PV current and voltage, MPPT current and voltage, battery current and voltage and inverter current and voltage were also measured and evaluated in the second part of the experiment. This lasted for a period of four years, starting from 1st January 2017 to 31st December 2020. Similarly, the second aspect was to monitor the electrical performance of the three systems and was performed for a period of six months, starting from January to June 2019. During the second experiment, hybrid and grid-assisted systems were reconfigured to function as off-grid systems. Moreover, a detailed data acquisition system designed to measure and record both meteorological and electrical parameters affecting the performance of the systems. The electrical parameters include PV current and voltage, MPPT current, battery current and voltage and inverter current and voltage. Other parameters in the measurements are; inverter efficiency, active and apparent power, while meteorological parameters include; solar irradiance, ambient temperature, relative humidity, wind speed and direction. The meteorological results show that the maximum and minimum mean amount of global solar radiation was 7.34 kWh/m2/day in December and 3.03 kWh/m2/day in June, respectively, while the average radiation and temperature for the typical year were 4.98 kWh/m2/day and 16.88 oC respectively. The solar radiations obtained are within the range in major places in South Africa. Similarly, an average wind speed of 2.5 m/s is experienced in Alice in a year and average solar radiation of 606.06 W/m2 in summer and 346.17 W/m2 in winter. The three lead-acid battery systems monitored under the electrical aspect are M-Molar, Trojan and Hoppecke battery systems. It was established that the charging current decreases gradually from 27.7 to 18.5 A for the M-Molar while Hoppecke and Trojan deceased respectively from 15 to 10 A and 23 to 13 A at the end of each phase by charging it at the maximum power point of the PV array. It was equally found that the M-Molar battery current has the highest rate of charging and quickest rate of discharging in comparison to the other two batteries. Finally, from the results gotten from this research, we may propose that the solar PV system contributes significantly to the satisfaction of the needed electricity in South Africa. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-08
- Authors: Apeh, Oliver Okechukwu https://orcid.org/0000-0003-4076-0613
- Date: 2021-08
- Subjects: Photovoltaic power systems , Solar energy
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21567 , vital:48888
- Description: PVsystem has recently emerged in South Africa as a way to curb the country’s persistent shortage of electricity. A wide effort for the past few decades have targeted at study, testing and demonstration of PV power systems which was established all over the country as an appropriate measure to tackle transportation, agriculture, industry, commercial as well as domestic activities. In view of these drives, both off-grid and grid-connected PV systems are being applied. However, operating a building with an off-grid system is one of the means to providing the possibility of energy access to places far away from the national grid. As an off-grid choice, 50 W SHS is being distributed to customers in distant rustic parts of the country where grid option is difficult to access. But the SHS of the stated capacity can barely generate 0.3 to 0.4 kWh of electric energy per day, even at the optimal solar radiations. In view of this, more efforts are directed at expanding the off-grid systems to accommodate large rural households in South Africa. This thesis is dedicated to a study on the various configurations and components of PV power plant as a way to enhance electricity generations in South Africa. To this effect, different power plants were considered at SolarWatt park, University of Fort Hare with the aim to conduct a comparative analysis of the charge controllers with respect to the charge and discharge rates of their respective batteries. The grid-connected PV power generation was classified into hybrid PV and grid-assisted PV, while off-grid is a BIPV. These power plants generations were installed for the purpose of research level with a total capacity of 11.4 kW. The off-grid system is made up of HIT modules, FlexMax80 charge controller, Victron energy inverter and M-Molar battery bank. The hybrid and grid-assisted systems each consist of 15 polycrystalline modules and Microcare charge controllers. In addition, hybrid comprises SMA Sunny Island inverter and Trojan battery bank whereas grid-assisted consist of Microcare inverter and Hoppercke battery bank. The first part of the experimental work was monitored, and the meteorological parameters which are ambient temperature, solar radiation, relative humidity and wind speed, were measured and evaluated while electrical parameters includes PV current and voltage, MPPT current and voltage, battery current and voltage and inverter current and voltage were also measured and evaluated in the second part of the experiment. This lasted for a period of four years, starting from 1st January 2017 to 31st December 2020. Similarly, the second aspect was to monitor the electrical performance of the three systems and was performed for a period of six months, starting from January to June 2019. During the second experiment, hybrid and grid-assisted systems were reconfigured to function as off-grid systems. Moreover, a detailed data acquisition system designed to measure and record both meteorological and electrical parameters affecting the performance of the systems. The electrical parameters include PV current and voltage, MPPT current, battery current and voltage and inverter current and voltage. Other parameters in the measurements are; inverter efficiency, active and apparent power, while meteorological parameters include; solar irradiance, ambient temperature, relative humidity, wind speed and direction. The meteorological results show that the maximum and minimum mean amount of global solar radiation was 7.34 kWh/m2/day in December and 3.03 kWh/m2/day in June, respectively, while the average radiation and temperature for the typical year were 4.98 kWh/m2/day and 16.88 oC respectively. The solar radiations obtained are within the range in major places in South Africa. Similarly, an average wind speed of 2.5 m/s is experienced in Alice in a year and average solar radiation of 606.06 W/m2 in summer and 346.17 W/m2 in winter. The three lead-acid battery systems monitored under the electrical aspect are M-Molar, Trojan and Hoppecke battery systems. It was established that the charging current decreases gradually from 27.7 to 18.5 A for the M-Molar while Hoppecke and Trojan deceased respectively from 15 to 10 A and 23 to 13 A at the end of each phase by charging it at the maximum power point of the PV array. It was equally found that the M-Molar battery current has the highest rate of charging and quickest rate of discharging in comparison to the other two batteries. Finally, from the results gotten from this research, we may propose that the solar PV system contributes significantly to the satisfaction of the needed electricity in South Africa. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-08
Analysis of challenges facing police retirees in the Eastern Cape of South Africa: development of adjustment programme for police retirees to the community
- Authors: Kwayiba, Nthabiseng Justina
- Date: 2021-07
- Subjects: Police -- Retirement , Police -- Pensions , Retirement income
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21977 , vital:51865
- Description: The purpose of the study was to investigate the challenges faced by police retirees of the Eastern Cape, South Africa, and to contribute towards the establishment of a post-retirement programme that would assist retirees to experience satisfaction in retirement. Upon retirement, police officers leave a job of personified authority and responsibility and become civilians. Throughout their career, police officers work under strenuous shifts, exposure to violence and witness gruesome incidents. In some cases, they facilitate the arrest of their neighbours and even family members in conflict with the law. How they adjust in the communities when they retire has never been investigated in the Eastern Cape, a research gap this study intended to address. A qualitative research methodology and a case study design was adopted. The data were collected from 21 participants. Semi-structured interviews and observations were used as methods of data collection. The interpretivism paradigm informed data analysis process. The life course theory was used as a theoretical framework for this study. The findings of this study revealed that police retirees experience challenges that are different from other public servants and the South African Police Service (SAPS) does not have programmes to prepare employees for retirement. The study established that most of the retirees had not yet adjusted to retirement because of the challenges they faced. Among the unique challenges that they experience are psychological challenges such as post-traumatic stress disorder (PTSD) emanating from their daily exposure to gruesome incidents, violence and working under strenuous shifts. The study also revealed that the retirees experienced broken social support system (family), social rejection by their previous employer (SAPS), and the communities they are retiring in. Therefore, as a result of rejection they relocate and start a new life somewhere else, where they suffer loneliness. Neglect by the employer (SAPS) made them feel useless and unappreciated. It was also established that the handing back of police equipment and uniforms makes them feel a sense of loss of power and authority, which makes them feel unsafe. The feeling of insecurity become more intense when the people they arrested threaten revenge on them when they are on retirement. The study recommends commitment from different stakeholders to assist employees in SAPS to experience a smooth and rewarding transition towards retirement. These include a pre-retirement planning programme that will engage employees ten years before retirement and require the employer’s commitment, a transition programme, that will engage retirees during retirement and require commitment from the police medical aid (POLMED) and community policing forum involvement. Finally, the establishment of social support system in the post-retirement programme is required for the extension of employee health and wellness (EHW) services. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-07
- Authors: Kwayiba, Nthabiseng Justina
- Date: 2021-07
- Subjects: Police -- Retirement , Police -- Pensions , Retirement income
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21977 , vital:51865
- Description: The purpose of the study was to investigate the challenges faced by police retirees of the Eastern Cape, South Africa, and to contribute towards the establishment of a post-retirement programme that would assist retirees to experience satisfaction in retirement. Upon retirement, police officers leave a job of personified authority and responsibility and become civilians. Throughout their career, police officers work under strenuous shifts, exposure to violence and witness gruesome incidents. In some cases, they facilitate the arrest of their neighbours and even family members in conflict with the law. How they adjust in the communities when they retire has never been investigated in the Eastern Cape, a research gap this study intended to address. A qualitative research methodology and a case study design was adopted. The data were collected from 21 participants. Semi-structured interviews and observations were used as methods of data collection. The interpretivism paradigm informed data analysis process. The life course theory was used as a theoretical framework for this study. The findings of this study revealed that police retirees experience challenges that are different from other public servants and the South African Police Service (SAPS) does not have programmes to prepare employees for retirement. The study established that most of the retirees had not yet adjusted to retirement because of the challenges they faced. Among the unique challenges that they experience are psychological challenges such as post-traumatic stress disorder (PTSD) emanating from their daily exposure to gruesome incidents, violence and working under strenuous shifts. The study also revealed that the retirees experienced broken social support system (family), social rejection by their previous employer (SAPS), and the communities they are retiring in. Therefore, as a result of rejection they relocate and start a new life somewhere else, where they suffer loneliness. Neglect by the employer (SAPS) made them feel useless and unappreciated. It was also established that the handing back of police equipment and uniforms makes them feel a sense of loss of power and authority, which makes them feel unsafe. The feeling of insecurity become more intense when the people they arrested threaten revenge on them when they are on retirement. The study recommends commitment from different stakeholders to assist employees in SAPS to experience a smooth and rewarding transition towards retirement. These include a pre-retirement planning programme that will engage employees ten years before retirement and require the employer’s commitment, a transition programme, that will engage retirees during retirement and require commitment from the police medical aid (POLMED) and community policing forum involvement. Finally, the establishment of social support system in the post-retirement programme is required for the extension of employee health and wellness (EHW) services. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-07
Effects of urban expansion on coastal vegetation ecosystems conservation and functioning in Buffalo City Metropolitan Municipality, South Africa
- Olatoye, Tolulope Ayodeji https://orcid.org/0000-0002-2249-9258
- Authors: Olatoye, Tolulope Ayodeji https://orcid.org/0000-0002-2249-9258
- Date: 2021-07
- Subjects: Sustainable development , City planning -- Environmental aspects
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21556 , vital:48885
- Description: Coastal urban expansion is on an upward trajectory, which poses serious threats to ecosystem functioning, human wellbeing and the general environment across the globe. It is on this premise that this study brings to the fore the growing complexity of environmental sustainability problems in a former apartheid space, as characterized by coastal urbanization and the intricacies of vegetation conservation. Consequently, literature utilized for this study reveals that urban expansion has led to an uncontrolled threat to the coastal ecosystem, culminating in soil erosion, environmental pollution through illegal dumping of solid waste, loss of coastal vegetation to other land use types, among others. Therefore, constant monitoring of these spaces is needed due to their fragility, as they are pivotal in the earth-atmosphere processes to the benefit of the entire humanity. To this end, the current study offers critical analysis and insights about the South African coastal ecological space. The essence of using BCMM in its consideration as an ecological space and former apartheid territory brings to the fore a scientific explanation of the spatial configuration and changes in the CVEs of the study area during the post-colonial era. In the course of investigating this study, the Urban Green Sustainability (UGS) theory was adopted in the course of selecting the review of literature, methodological approach and analysis of results. A mixed methodological approach (qualitative, quantitative and geospatial techniques) was explored in data collection and analysis. 254 copies of the questionnaire were returned and analysed for this research. Results generated revealed by the BCMM respondents confirms the occurrence of uncontrolled urbanization, deforestation and crop cultivation as major causes of coastal vegetation loss. In the same vein, the LULC classification results revealed that about 466 km2 of forest vegetation has been lost in BCMM from 1998-2018. Also, LULC classification results were validated by performing the Normalized Difference Built-Up Index (NDBI), Normalized Difference Vegetative Index (NDVI), Kappa’s coefficient (k), coefficient of determination (R2) and Pearson’s Product Moment Correlation (P) tests. The results also revealed that the built-up area had increased from 194 km2 in 1998 to 814 km2 in 2008. Further, all statistical tests revealed very good and highly correlated overall classification accuracies (of R2=0.89 and P=0.86) during the study period (1998 – 2018). This study makes a clarion call towards the rehabilitation of degraded coastal environments and proffers solutions towards the actualization of environmentally sustainable CVEs which offers optimal ecosystem services. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-07
- Authors: Olatoye, Tolulope Ayodeji https://orcid.org/0000-0002-2249-9258
- Date: 2021-07
- Subjects: Sustainable development , City planning -- Environmental aspects
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21556 , vital:48885
- Description: Coastal urban expansion is on an upward trajectory, which poses serious threats to ecosystem functioning, human wellbeing and the general environment across the globe. It is on this premise that this study brings to the fore the growing complexity of environmental sustainability problems in a former apartheid space, as characterized by coastal urbanization and the intricacies of vegetation conservation. Consequently, literature utilized for this study reveals that urban expansion has led to an uncontrolled threat to the coastal ecosystem, culminating in soil erosion, environmental pollution through illegal dumping of solid waste, loss of coastal vegetation to other land use types, among others. Therefore, constant monitoring of these spaces is needed due to their fragility, as they are pivotal in the earth-atmosphere processes to the benefit of the entire humanity. To this end, the current study offers critical analysis and insights about the South African coastal ecological space. The essence of using BCMM in its consideration as an ecological space and former apartheid territory brings to the fore a scientific explanation of the spatial configuration and changes in the CVEs of the study area during the post-colonial era. In the course of investigating this study, the Urban Green Sustainability (UGS) theory was adopted in the course of selecting the review of literature, methodological approach and analysis of results. A mixed methodological approach (qualitative, quantitative and geospatial techniques) was explored in data collection and analysis. 254 copies of the questionnaire were returned and analysed for this research. Results generated revealed by the BCMM respondents confirms the occurrence of uncontrolled urbanization, deforestation and crop cultivation as major causes of coastal vegetation loss. In the same vein, the LULC classification results revealed that about 466 km2 of forest vegetation has been lost in BCMM from 1998-2018. Also, LULC classification results were validated by performing the Normalized Difference Built-Up Index (NDBI), Normalized Difference Vegetative Index (NDVI), Kappa’s coefficient (k), coefficient of determination (R2) and Pearson’s Product Moment Correlation (P) tests. The results also revealed that the built-up area had increased from 194 km2 in 1998 to 814 km2 in 2008. Further, all statistical tests revealed very good and highly correlated overall classification accuracies (of R2=0.89 and P=0.86) during the study period (1998 – 2018). This study makes a clarion call towards the rehabilitation of degraded coastal environments and proffers solutions towards the actualization of environmentally sustainable CVEs which offers optimal ecosystem services. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-07
The dynamics of household debt in South Africa
- Authors: Mabitle, Mope
- Date: 2021-07
- Subjects: Debt , Finance, Personal
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21781 , vital:51751
- Description: Household debt as a proportion of South African household disposable income remain alarmingly above 70 percent. Impliedly, the majority of households are spending the bulk of their income on servicing debt. This not only puts a strain on household welfare but also on economic growth as household spending is the major contributor to economic activity in the country. Based on this background, the study examines the dynamics of the South African household debt. The analysis was done both at the macro and individual/household level (micro). The macro-level data covered the period from 1994 to 2018 utilizing the Autoregressive Distributed Lag model. The empirical results indicated that there is both a long-term and short-term relationship between the variables of interest. The results further show that the majority of low-income households in South Africa borrow more, as a way to smoothen their consumption. Interest rate as the official instrument to counter borrowing was found to have a positive relationship with household debt, indicating that households borrow to settle the existing debt as interest rates increases. The dummy variable used to capture the credit regulations enactment/amendments was found to be insignificant in the long run. This suggests that credit regulations implemented in South Africa have not reduced the propensity to borrow. At a micro level, the National Income Dynamics Study (NIDS) data was used. Five waves of data were collected on the same individuals every 2 years. Panel regressions were employed in the analysis and the empirical results revealed that employment and income at the micro-level are found to be strong determinants of household debt. The results further showed that being a male and a white individual was positively associated with the likelihood of taking up more debt in general. On the other hand, the results indicated that being a black African is associated with a high likelihood of using services from most of the informal non-banking institutions. The results also revealed that the greater the education level of the head of the household, the higher the probability of taking more debt. One of the telltale signs of over-indebtedness is the persistence of debt, households respond to increased debt and their inability to repay it by increasing their borrowing. The study also investigated the transmission matrices of households in and out of debt. The results indicate a higher transition frequency in and out of debt on informal loans from the non-banking sector that is normally accessed by the poorer households, this could indicate debt entrapment and the persistence of debt at lower-income levels. Based on empirical results, the study recommended policies that would support consumption without necessarily increasing the credit appetite of household debt. Additional recommendations are those that support selective lending and the strengthening of the risk management of lending institutions. Furthermore, to combat the rising levels of household debt, several measures are proposed in the study. , Thesis (PhD) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-07
- Authors: Mabitle, Mope
- Date: 2021-07
- Subjects: Debt , Finance, Personal
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21781 , vital:51751
- Description: Household debt as a proportion of South African household disposable income remain alarmingly above 70 percent. Impliedly, the majority of households are spending the bulk of their income on servicing debt. This not only puts a strain on household welfare but also on economic growth as household spending is the major contributor to economic activity in the country. Based on this background, the study examines the dynamics of the South African household debt. The analysis was done both at the macro and individual/household level (micro). The macro-level data covered the period from 1994 to 2018 utilizing the Autoregressive Distributed Lag model. The empirical results indicated that there is both a long-term and short-term relationship between the variables of interest. The results further show that the majority of low-income households in South Africa borrow more, as a way to smoothen their consumption. Interest rate as the official instrument to counter borrowing was found to have a positive relationship with household debt, indicating that households borrow to settle the existing debt as interest rates increases. The dummy variable used to capture the credit regulations enactment/amendments was found to be insignificant in the long run. This suggests that credit regulations implemented in South Africa have not reduced the propensity to borrow. At a micro level, the National Income Dynamics Study (NIDS) data was used. Five waves of data were collected on the same individuals every 2 years. Panel regressions were employed in the analysis and the empirical results revealed that employment and income at the micro-level are found to be strong determinants of household debt. The results further showed that being a male and a white individual was positively associated with the likelihood of taking up more debt in general. On the other hand, the results indicated that being a black African is associated with a high likelihood of using services from most of the informal non-banking institutions. The results also revealed that the greater the education level of the head of the household, the higher the probability of taking more debt. One of the telltale signs of over-indebtedness is the persistence of debt, households respond to increased debt and their inability to repay it by increasing their borrowing. The study also investigated the transmission matrices of households in and out of debt. The results indicate a higher transition frequency in and out of debt on informal loans from the non-banking sector that is normally accessed by the poorer households, this could indicate debt entrapment and the persistence of debt at lower-income levels. Based on empirical results, the study recommended policies that would support consumption without necessarily increasing the credit appetite of household debt. Additional recommendations are those that support selective lending and the strengthening of the risk management of lending institutions. Furthermore, to combat the rising levels of household debt, several measures are proposed in the study. , Thesis (PhD) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-07
The School Governing Bodies conceptualization of ulwaluko in school-based policies: Towards a deconstructed educational leadership and management framework
- Gqeba, Nokuzola Gloria https://orcid.org/ 0000-0002-9009-2150
- Authors: Gqeba, Nokuzola Gloria https://orcid.org/ 0000-0002-9009-2150
- Date: 2021-07
- Subjects: Initiation rites
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20057 , vital:45104
- Description: Ulwaluko (male initiation), one of the African traditions, which serves as transitional rite of passage from boyhood, has evolved over time, through the colonial era, apartheid regime and the current dispensation (Ntsebeza, 2004). Evidence indicates that within the South African context, the majority of candidates of Ulwaluko are males of school-going age. Ulwaluko is said to be a school where initiates are taught, yet there is no link between ulwaluko and formal schooling. Therefore, the study examines the extent to which School Governing Bodies (SGBs) conceptualize ulwaluko in the school-based policies. The study used theoretical lenses of Hall’s ‘Third Space’ or hybridity, as well as Decoloniality, qualitative approach, and a Case Study Design. For this study, two high schools were purposely sampled, with a total of twelve participants that included Principals, SGB Chairpersons, and SGB Educator Representatives, Representatives of Learners and Ordinary SGB members. In-depth interviews and document reviews were employed as research instruments. The findings of the study suggest that even though ulwaluko seemed to affect the management of the two schools, it was not explicitly addressed in their policies. Ulwaluko is reluctantly and cautiously addressed informally. Lastly, the schools were reportedly reluctant to open debates on how ulwaluko could be accommodated for fear of “contaminating” school protocols with the African culture, which they thought did not belong in schools. The study makes various suggestions to build a strong relationship between ulwaluko and formal school practices. One of the main recommendations is the integration of ulwaluko into the mainstream education system through school governance and school-based policy. The study also proposes a deconstructed leadership and management framework that places African cultural practices such as Ulwaluko into the mainstream of management and curriculum. , Thesis (PhD) -- Faculty of Education, 2021
- Full Text:
- Date Issued: 2021-07
- Authors: Gqeba, Nokuzola Gloria https://orcid.org/ 0000-0002-9009-2150
- Date: 2021-07
- Subjects: Initiation rites
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20057 , vital:45104
- Description: Ulwaluko (male initiation), one of the African traditions, which serves as transitional rite of passage from boyhood, has evolved over time, through the colonial era, apartheid regime and the current dispensation (Ntsebeza, 2004). Evidence indicates that within the South African context, the majority of candidates of Ulwaluko are males of school-going age. Ulwaluko is said to be a school where initiates are taught, yet there is no link between ulwaluko and formal schooling. Therefore, the study examines the extent to which School Governing Bodies (SGBs) conceptualize ulwaluko in the school-based policies. The study used theoretical lenses of Hall’s ‘Third Space’ or hybridity, as well as Decoloniality, qualitative approach, and a Case Study Design. For this study, two high schools were purposely sampled, with a total of twelve participants that included Principals, SGB Chairpersons, and SGB Educator Representatives, Representatives of Learners and Ordinary SGB members. In-depth interviews and document reviews were employed as research instruments. The findings of the study suggest that even though ulwaluko seemed to affect the management of the two schools, it was not explicitly addressed in their policies. Ulwaluko is reluctantly and cautiously addressed informally. Lastly, the schools were reportedly reluctant to open debates on how ulwaluko could be accommodated for fear of “contaminating” school protocols with the African culture, which they thought did not belong in schools. The study makes various suggestions to build a strong relationship between ulwaluko and formal school practices. One of the main recommendations is the integration of ulwaluko into the mainstream education system through school governance and school-based policy. The study also proposes a deconstructed leadership and management framework that places African cultural practices such as Ulwaluko into the mainstream of management and curriculum. , Thesis (PhD) -- Faculty of Education, 2021
- Full Text:
- Date Issued: 2021-07
A gender responsive entrepreneurship development (GRED) model for Zimbabwe’s creative industry: : A focus on women sculptors
- Basiyawo, Patricia Heriette Mwedzi https://orcid.org/0000-0003-3889-177X
- Authors: Basiyawo, Patricia Heriette Mwedzi https://orcid.org/0000-0003-3889-177X
- Date: 2021-06
- Subjects: Entrepreneurship , Women-owned business enterprises , Women artists -- Zimbabwe
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21748 , vital:51748
- Description: This study was based on the GRED model and it sought to proffer solution to the challenges being faced by women sculptor entrepreneurs in Zimbabwe’s creative industry. The solution is set to help the policy makers, women in the creative industry and non-governmental organizations that work with women in the sculpting industry. The study’s main thrust was to create a gender responsive entrepreneurship development model for Zimbabwe’s creative industry. The entire study was anchored on determining the conceptual and contextual basis for a gender responsive approach to entrepreneurial development interventions, interrogating current government entrepreneurship approaches in Zimbabwe, determining important antecedents for entrepreneurship development that respond to gender dynamics within the creative industry in Zimbabwe and designing a GRED model for Zimbabwe’s creative industry basing on the findings of the research. The research employed qualitative research, through which focus group discussions, individual interviews, observations and document analysis were exploited for data collection. Armed with permission from UREC and the Ministries responsible for the creative industry, this study established that women in the creative industry were marginalized, poorly resourced and that government approaches and strategies were not being well implemented to benefit them. The study also revealed that most of the entrepreneurial activities were marred by corruption. The following tenets were recommended to foster viable women sculptors’ entrepreneurship: 50:50 representation, robust use of opportunities, business registration, forming of associations, funding, support, training, exhibitions, records keeping, monitoring and evaluation. The above tenets formed the basis of the constructed GRED model. , Thesis (PhD) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-06
- Authors: Basiyawo, Patricia Heriette Mwedzi https://orcid.org/0000-0003-3889-177X
- Date: 2021-06
- Subjects: Entrepreneurship , Women-owned business enterprises , Women artists -- Zimbabwe
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21748 , vital:51748
- Description: This study was based on the GRED model and it sought to proffer solution to the challenges being faced by women sculptor entrepreneurs in Zimbabwe’s creative industry. The solution is set to help the policy makers, women in the creative industry and non-governmental organizations that work with women in the sculpting industry. The study’s main thrust was to create a gender responsive entrepreneurship development model for Zimbabwe’s creative industry. The entire study was anchored on determining the conceptual and contextual basis for a gender responsive approach to entrepreneurial development interventions, interrogating current government entrepreneurship approaches in Zimbabwe, determining important antecedents for entrepreneurship development that respond to gender dynamics within the creative industry in Zimbabwe and designing a GRED model for Zimbabwe’s creative industry basing on the findings of the research. The research employed qualitative research, through which focus group discussions, individual interviews, observations and document analysis were exploited for data collection. Armed with permission from UREC and the Ministries responsible for the creative industry, this study established that women in the creative industry were marginalized, poorly resourced and that government approaches and strategies were not being well implemented to benefit them. The study also revealed that most of the entrepreneurial activities were marred by corruption. The following tenets were recommended to foster viable women sculptors’ entrepreneurship: 50:50 representation, robust use of opportunities, business registration, forming of associations, funding, support, training, exhibitions, records keeping, monitoring and evaluation. The above tenets formed the basis of the constructed GRED model. , Thesis (PhD) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-06
Examining trainee teacher preparation for inclusive education in Zimbambwe
- Authors: Chikwaka, Miriam
- Date: 2021-06
- Subjects: Inclusive education , Teaching , Education--Zimbabwe--History
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20046 , vital:45091
- Description: The research examined trainee teachers’ preparation for inclusive education in two teacher training colleges in Zimbabwe. Concerns are being raised that teacher preparation programmes are not adequately preparing trainee teachers for a holistic practice-based inclusive education. There is no agreement on the meaning of the concept of inclusive education. While some teacher educators resort to the traditional special needs education, others have adopted a paradigm shift to holistic inclusive education. The teacher education curriculum has not been aligned to teacher preparation for inclusive education. Trainee teachers go for teaching practice up to certification as qualified teachers without having acquired the skills and competencies for handling classrooms of learners with diverse educational needs. The study adopted pragmatism as the research paradigm, mixed-methods approach and QUAN-QUAL sequential explanatory triangulation of research designs; data collection instruments, data analysis and presentation of results were adopted. The researcher used stratified random sampling for quantitative data collection; and purposive, convenience, and snowball sampling for qualitative data collection. The total sample size was 210 trainee teachers and 20 teacher educators. Research instruments pilot-tested semi-structured questionnaires, semi-structured interviews, and documentary analysis. The internal consistency and validity of the instruments was checked using Cronbach’s alpha test and coefficients above 0.8 were obtained showing that the instruments were reliable and trustworthy. The results were that trainee teachers were inadequately prepared for inclusive educational practice. Teacher educators do not have the adequate subject and pedagogical content knowledge to prepare trainee teachers for inclusive education. Both teacher educators and their trainee teachers do not understand holistic practice-based inclusive education. The challenges in preparing trainee teachers for inclusive education include ignorance of inclusive education legislation, non-inclusive teacher education curriculum, and teacher educators’ lack of inclusive teacher preparation competencies, and shortage of financial and inclusive education material resources. Strategies to improve the quality of teacher preparation for inclusive education practices include policy and teacher education curriculum reforms, teacher educator empowerment, funding, and infrastructure development. The success of inclusive education largely depends on the collaboration between intellectuals, academia industry, governments and the community at large. The keywords are teacher preparation, inclusive education, teacher educator, and trainee teacher. , Thesis (PhD) -- Faculty of Education, 2021
- Full Text:
- Date Issued: 2021-06
- Authors: Chikwaka, Miriam
- Date: 2021-06
- Subjects: Inclusive education , Teaching , Education--Zimbabwe--History
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20046 , vital:45091
- Description: The research examined trainee teachers’ preparation for inclusive education in two teacher training colleges in Zimbabwe. Concerns are being raised that teacher preparation programmes are not adequately preparing trainee teachers for a holistic practice-based inclusive education. There is no agreement on the meaning of the concept of inclusive education. While some teacher educators resort to the traditional special needs education, others have adopted a paradigm shift to holistic inclusive education. The teacher education curriculum has not been aligned to teacher preparation for inclusive education. Trainee teachers go for teaching practice up to certification as qualified teachers without having acquired the skills and competencies for handling classrooms of learners with diverse educational needs. The study adopted pragmatism as the research paradigm, mixed-methods approach and QUAN-QUAL sequential explanatory triangulation of research designs; data collection instruments, data analysis and presentation of results were adopted. The researcher used stratified random sampling for quantitative data collection; and purposive, convenience, and snowball sampling for qualitative data collection. The total sample size was 210 trainee teachers and 20 teacher educators. Research instruments pilot-tested semi-structured questionnaires, semi-structured interviews, and documentary analysis. The internal consistency and validity of the instruments was checked using Cronbach’s alpha test and coefficients above 0.8 were obtained showing that the instruments were reliable and trustworthy. The results were that trainee teachers were inadequately prepared for inclusive educational practice. Teacher educators do not have the adequate subject and pedagogical content knowledge to prepare trainee teachers for inclusive education. Both teacher educators and their trainee teachers do not understand holistic practice-based inclusive education. The challenges in preparing trainee teachers for inclusive education include ignorance of inclusive education legislation, non-inclusive teacher education curriculum, and teacher educators’ lack of inclusive teacher preparation competencies, and shortage of financial and inclusive education material resources. Strategies to improve the quality of teacher preparation for inclusive education practices include policy and teacher education curriculum reforms, teacher educator empowerment, funding, and infrastructure development. The success of inclusive education largely depends on the collaboration between intellectuals, academia industry, governments and the community at large. The keywords are teacher preparation, inclusive education, teacher educator, and trainee teacher. , Thesis (PhD) -- Faculty of Education, 2021
- Full Text:
- Date Issued: 2021-06
Investigation of the levels of PBDEs and PCNs in the surface water and sediments from selected waterbodies in the Eastern Cape Province, South Africa
- Agunbiade, Idowu Victoria https://orcid.org/0000-0001-5605-0312
- Authors: Agunbiade, Idowu Victoria https://orcid.org/0000-0001-5605-0312
- Date: 2021-06
- Subjects: Persistent pollutants , Water -- Purification -- Organic compounds removal , Organic water pollutants
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22699 , vital:52660
- Description: Studies have revealed that persistent organic pollutants (POPs) are omnipresent in our environment; almost all human beings have definite levels of POPs in their bodies. Even fetus and embryos are not spared; they have been found to bear certain levels of POPs. So far, there are about 28 chemicals listed as POPs among which are polybrominated diphenyl ethers (PBDEs) and polychlorinated naphthalenes (PCNs). PCN and PBDE distributions have been reported from different sources around the world, but studies relating to PCNs occurrence and distribution in Africa, especially South Africa is still minimal. PBDEs have been reported to cause diabetes, cancer, damage to reproductive system, thyroid, liver and other vital organs in the body, while PCNs have been linked to chloracne (severe skin reactions/lesions) and liver disease (yellow atrophy) in humans, chicken oedema and X-disease in cattle. Hence, this study evaluates PCN levels in water and sediment samples from three waterbodies: North End Lake (NEL), Chatty River (CHA) and Makman Canal (MMC), while PBDE levels was reported in NEL and CHA samples. The three sites are located in Port Elizabeth, Eastern Cape Province (ECP) of South Africa. The lake serves as a recreational resort while the latter two waterbodies are tributaries discharging into the Swartkop Estuary, an important estuary in ECP. Water samples were extracted with C18 cartridges (solid phase), while soxhlet was employed for the extraction of sediments. Water and sediment extricates were purified and quantified with gas chromatography-micro electron capture detector (GC-μECD). Forty-seven (47) water samples and 44 sediment samples were collected in August until December 2020 from six sampling points in NEL, five points in each of CHA and MMC. All the samples were evaluated for physicochemical properties, PBDEs and PCNs using validated standard methods. The sampling period covered three South Africa seasons: August (winter), October (spring) and December (summer). The physicochemical parameters (PP) of NEL water samples for the three seasons generally varied as follows: temperature (15.3–23°C), pH (7.9–10.3), oxidation-reduction potential, ORP (23.4-110 mV), atmospheric pressure, AP (14.52-15.56 PSI), turbidity (15.1–167 NTU), electrical conductivity, EC (114–1291 μS/cm), total dissolved solids, TDS (55-645 mg/L), total suspended solids, TSS (20–107 mg/L) and salinity (0.05–0.65 PSU). All the PPs except for turbidity and TSS are within acceptable limits. NEL sediments had moisture content (MC), organic matter (OM) and organic carbon (OC) in the range of 0.04–8.0percent, 0.08–2.2percent and 0.05–1.8percent, respectively. The sum of eight PCN congeners Σ8PCNs and six PBDE congeners Σ6PBDEs in NEL water samples ranged from 0.164–2.934 μg/L and 0.009-1.025 μg/L individually. The values for Σ8PCNs and Σ6PBDEs in NEL sediment samples varied from 0.991–237 μg/kg and 0.354-28.850 μg/kg, respectively. The calculated hazard quotient (HQ) corresponding to the non-carcinogenic health risk associated with PBDEs in NEL water samples was 2.0×10-3-1.4×10-1, while the TEQ values due to PCNs varied from 6.10×10-7- 3.12×10-3 μg/L in NEL water samples and 3.70×10-5-1.96×10-2 μg/kg dw in sediments. The PP values for CHA water samples include temperature (15.4–22.9°C), pH (7.7–10.5), TDS (991–1771 mg/L), TSS (6–41 mg/L), turbidity (1.0–198 NTU), EC (1981–3542 μS/cm), AP (14.60–14.80 PSI), ORP (-339.1-51.3 mV), and salinity (1.02–1.87 PSU). The EC, TDS and salinity exceeded acceptable values at certain points. The sediments of CHA have MC, OM and OC contents ranging from 0.01-10.2percent, 0.2-1.3percent and 0.1-0.8percent in that order. Sum of Σ8PCNs, Σ6PBDEs in CHA water and sediment samples ranged from 0.026–1.054 μg/L, 0.007-0.079 μg/L and 0.429–1888.468 μg/kg, 0.347-6.468 μg/kg individually. The HQ in CHA water samples was 1.6×10-3-7.7×10-3 and the estimated TEQ was 1.0×10-7-6.62×10-5 μg/L and 1.10×10−5-6.40×10−2 μg/kg in water and sediments, respectively. The temperatures for MMC water samples ranged from 15.6-24.5°C, while other PPs recorded were as follows: pH (8.4-10.2), TDS (943–4002 mg/L), TSS (7-491 mg/L), turbidity (2.9-154.2 NTU), EC (1885-8004 μS/cm), AP (14.53–14.82 PSI), ORP (7.8-130 mV) and salinity (0.96-4.47 PSU). MMC’s sediments recorded MC, OM and OC varying as 0.4- 18.9percent, 0.2-4.5percent and 0.1-2.6percent, respectively across the three seasons. The Σ8PCNs for MMC water and sediment samples were 0.035–0.699 μg/L and 0.260–6744 μg/kg. The TEQ values in MMC water and sediment samples were 1.19×10-7-1.47×10-4 μg/L and 4.43×10−5- 4.19×10−1 μg/kg, respectively. The results are all less than one, and this suggests that the selected water is safe. Results showed that NEL water had highest TEQ, PCN and PBDE concentrations, while MMC sediments recorded maximum TEQ and PCN levels in this study. PBDE concentrations in NEL sediments were above the other site. In conclusion, NEL water was most polluted with both pollutants (PCNs and PBDEs), but MMC sediments contained more PCNs. There is need for the immediate remediation of these selected waterbodies. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-06
- Authors: Agunbiade, Idowu Victoria https://orcid.org/0000-0001-5605-0312
- Date: 2021-06
- Subjects: Persistent pollutants , Water -- Purification -- Organic compounds removal , Organic water pollutants
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22699 , vital:52660
- Description: Studies have revealed that persistent organic pollutants (POPs) are omnipresent in our environment; almost all human beings have definite levels of POPs in their bodies. Even fetus and embryos are not spared; they have been found to bear certain levels of POPs. So far, there are about 28 chemicals listed as POPs among which are polybrominated diphenyl ethers (PBDEs) and polychlorinated naphthalenes (PCNs). PCN and PBDE distributions have been reported from different sources around the world, but studies relating to PCNs occurrence and distribution in Africa, especially South Africa is still minimal. PBDEs have been reported to cause diabetes, cancer, damage to reproductive system, thyroid, liver and other vital organs in the body, while PCNs have been linked to chloracne (severe skin reactions/lesions) and liver disease (yellow atrophy) in humans, chicken oedema and X-disease in cattle. Hence, this study evaluates PCN levels in water and sediment samples from three waterbodies: North End Lake (NEL), Chatty River (CHA) and Makman Canal (MMC), while PBDE levels was reported in NEL and CHA samples. The three sites are located in Port Elizabeth, Eastern Cape Province (ECP) of South Africa. The lake serves as a recreational resort while the latter two waterbodies are tributaries discharging into the Swartkop Estuary, an important estuary in ECP. Water samples were extracted with C18 cartridges (solid phase), while soxhlet was employed for the extraction of sediments. Water and sediment extricates were purified and quantified with gas chromatography-micro electron capture detector (GC-μECD). Forty-seven (47) water samples and 44 sediment samples were collected in August until December 2020 from six sampling points in NEL, five points in each of CHA and MMC. All the samples were evaluated for physicochemical properties, PBDEs and PCNs using validated standard methods. The sampling period covered three South Africa seasons: August (winter), October (spring) and December (summer). The physicochemical parameters (PP) of NEL water samples for the three seasons generally varied as follows: temperature (15.3–23°C), pH (7.9–10.3), oxidation-reduction potential, ORP (23.4-110 mV), atmospheric pressure, AP (14.52-15.56 PSI), turbidity (15.1–167 NTU), electrical conductivity, EC (114–1291 μS/cm), total dissolved solids, TDS (55-645 mg/L), total suspended solids, TSS (20–107 mg/L) and salinity (0.05–0.65 PSU). All the PPs except for turbidity and TSS are within acceptable limits. NEL sediments had moisture content (MC), organic matter (OM) and organic carbon (OC) in the range of 0.04–8.0percent, 0.08–2.2percent and 0.05–1.8percent, respectively. The sum of eight PCN congeners Σ8PCNs and six PBDE congeners Σ6PBDEs in NEL water samples ranged from 0.164–2.934 μg/L and 0.009-1.025 μg/L individually. The values for Σ8PCNs and Σ6PBDEs in NEL sediment samples varied from 0.991–237 μg/kg and 0.354-28.850 μg/kg, respectively. The calculated hazard quotient (HQ) corresponding to the non-carcinogenic health risk associated with PBDEs in NEL water samples was 2.0×10-3-1.4×10-1, while the TEQ values due to PCNs varied from 6.10×10-7- 3.12×10-3 μg/L in NEL water samples and 3.70×10-5-1.96×10-2 μg/kg dw in sediments. The PP values for CHA water samples include temperature (15.4–22.9°C), pH (7.7–10.5), TDS (991–1771 mg/L), TSS (6–41 mg/L), turbidity (1.0–198 NTU), EC (1981–3542 μS/cm), AP (14.60–14.80 PSI), ORP (-339.1-51.3 mV), and salinity (1.02–1.87 PSU). The EC, TDS and salinity exceeded acceptable values at certain points. The sediments of CHA have MC, OM and OC contents ranging from 0.01-10.2percent, 0.2-1.3percent and 0.1-0.8percent in that order. Sum of Σ8PCNs, Σ6PBDEs in CHA water and sediment samples ranged from 0.026–1.054 μg/L, 0.007-0.079 μg/L and 0.429–1888.468 μg/kg, 0.347-6.468 μg/kg individually. The HQ in CHA water samples was 1.6×10-3-7.7×10-3 and the estimated TEQ was 1.0×10-7-6.62×10-5 μg/L and 1.10×10−5-6.40×10−2 μg/kg in water and sediments, respectively. The temperatures for MMC water samples ranged from 15.6-24.5°C, while other PPs recorded were as follows: pH (8.4-10.2), TDS (943–4002 mg/L), TSS (7-491 mg/L), turbidity (2.9-154.2 NTU), EC (1885-8004 μS/cm), AP (14.53–14.82 PSI), ORP (7.8-130 mV) and salinity (0.96-4.47 PSU). MMC’s sediments recorded MC, OM and OC varying as 0.4- 18.9percent, 0.2-4.5percent and 0.1-2.6percent, respectively across the three seasons. The Σ8PCNs for MMC water and sediment samples were 0.035–0.699 μg/L and 0.260–6744 μg/kg. The TEQ values in MMC water and sediment samples were 1.19×10-7-1.47×10-4 μg/L and 4.43×10−5- 4.19×10−1 μg/kg, respectively. The results are all less than one, and this suggests that the selected water is safe. Results showed that NEL water had highest TEQ, PCN and PBDE concentrations, while MMC sediments recorded maximum TEQ and PCN levels in this study. PBDE concentrations in NEL sediments were above the other site. In conclusion, NEL water was most polluted with both pollutants (PCNs and PBDEs), but MMC sediments contained more PCNs. There is need for the immediate remediation of these selected waterbodies. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-06
Leadership experiences of six female deans in South African universities
- Mankayi, Mandisa https://orcid.org/0000-0002-6732-8559
- Authors: Mankayi, Mandisa https://orcid.org/0000-0002-6732-8559
- Date: 2021-06
- Subjects: Women in higher education , Educational leadership
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/26197 , vital:64957
- Description: The leadership of universities should be aware of and acknowledge the needs of female academics in order to facilitate the creation of an atmosphere that is welcoming to women. Currently, the needs of female academics are not being met by universities. In this study, the experiences of women from the Eastern Cape Province who have held positions as faculty deans in South African universities are investigated from the perspective of leadership. The interpretive paradigm was utilised throughout this qualitative research project. As a means of gathering information for the study, an interview guide with a structured format was combined with personal diaries. The questioning during the interview itself was unstructured because it was determined by the responses received from the people being interviewed. Interviews were conducted with six female deans from three different universities, using a technique called convenience sampling. After finishing the interview using an audio recorder, the recording was transcribed, and a technique called thematic analysis was applied to it. Because the study used theoretical lenses, the standpoint theory and feminist empiricism were both used in its analysis. According to the findings, despite the fact that South Africa has taken steps to ensure that men and women have equal opportunities and that legislation such as the Employment Act has been passed, women continue to face obstacles when trying to occupy higher leadership positions. Even though the study was not explicit in terms of the support they get from their colleagues, they mentioned the lack of support from their male counterparts. They experienced some major challenges as a result of the interaction between their leadership roles and the roles they held in their organisations. The participants suggested the underlying masculine conceptualization of leadership in their day-to-day interactions, such as working after hours and extensive travel, both of which were in conflict with their roles as mothers. According to the suggestions that have been made, the execution of the leadership roles and responsibilities shouldn't just be seen from a man's point of view. The performance of these roles ought to take into account gender sensitivity at every stage. Since things have not really moved in the direction that was anticipated, the government of South Africa ought to move more quickly to implement the equality law. , Thesis (PhD) -- Faculty of Education, 2021
- Full Text:
- Date Issued: 2021-06
- Authors: Mankayi, Mandisa https://orcid.org/0000-0002-6732-8559
- Date: 2021-06
- Subjects: Women in higher education , Educational leadership
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/26197 , vital:64957
- Description: The leadership of universities should be aware of and acknowledge the needs of female academics in order to facilitate the creation of an atmosphere that is welcoming to women. Currently, the needs of female academics are not being met by universities. In this study, the experiences of women from the Eastern Cape Province who have held positions as faculty deans in South African universities are investigated from the perspective of leadership. The interpretive paradigm was utilised throughout this qualitative research project. As a means of gathering information for the study, an interview guide with a structured format was combined with personal diaries. The questioning during the interview itself was unstructured because it was determined by the responses received from the people being interviewed. Interviews were conducted with six female deans from three different universities, using a technique called convenience sampling. After finishing the interview using an audio recorder, the recording was transcribed, and a technique called thematic analysis was applied to it. Because the study used theoretical lenses, the standpoint theory and feminist empiricism were both used in its analysis. According to the findings, despite the fact that South Africa has taken steps to ensure that men and women have equal opportunities and that legislation such as the Employment Act has been passed, women continue to face obstacles when trying to occupy higher leadership positions. Even though the study was not explicit in terms of the support they get from their colleagues, they mentioned the lack of support from their male counterparts. They experienced some major challenges as a result of the interaction between their leadership roles and the roles they held in their organisations. The participants suggested the underlying masculine conceptualization of leadership in their day-to-day interactions, such as working after hours and extensive travel, both of which were in conflict with their roles as mothers. According to the suggestions that have been made, the execution of the leadership roles and responsibilities shouldn't just be seen from a man's point of view. The performance of these roles ought to take into account gender sensitivity at every stage. Since things have not really moved in the direction that was anticipated, the government of South Africa ought to move more quickly to implement the equality law. , Thesis (PhD) -- Faculty of Education, 2021
- Full Text:
- Date Issued: 2021-06
Market participation and welfare of smallholder farmers in the Eastern Cape Province South Africa
- Lesala, Mahali Elizabeth https://orcid.org/0000-0001-9921-2190
- Authors: Lesala, Mahali Elizabeth https://orcid.org/0000-0001-9921-2190
- Date: 2021-06
- Subjects: Farms, Small , Economic development -- South Africa , Agriculture -- Economic aspects -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20916 , vital:46745
- Description: The low market participation of smallholder farmers in markets has received enormous attention from scholars, both in the country and the Eastern Cape Province. However, it is not clear how low their market participation is including its implications on farmer’s welfare. The purpose of the study was to determine the extent to which smallholder farmers in the homelands of the Eastern Cape participate in output markets and assess how their participation in markets has affected wellbeing of their households. This information will have important practical implications for policy regarding appropriate pathways for poverty alleviation and livelihoods improvements in the rural areas of the Eastern Cape Province. Three irrigation schemes; Qamata, Zanyokwe and Tyefu irrigation schemes were selected for this study. A sample of 210 smallholder irrigators were interviewed by means of a close-ended questionnaire. The data were analysed by means of descriptive statistical tools, the multiple-level choice models and the Propensity Score Matching (PSM) technique. SPSS and STATA computer programmes were used to carry out all the estimations. The analysis established that, although agriculture is the primary activity for rural livelihoods, it is not the main contributor to family income. Rather, remittances and social grants were the dominant sources of household income in the Qamata, Zanyokwe and Tyefu areas. From the standpoint of market, maize and potatoes are the most popular crops, but potatoes dominate the market. This result confirms that maize is the staple crop and therefore mostly grown for home consumption while production of potatoes is market-oriented. The Market Participation Index (MPI) revealed that farmers sell at least 55 percent of their farm produce, implying that farmers have made some transition from subsistence to semi-commercial farming. However, farmers’ priority still remains food self-sufficiency and market participation only takes place after satisfying their home food needs. The results revealed that the significant factors influencing the farmers’ decisions and their extent of participation in output markets were the age, gender, marital status of the household head, primary occupation of household head, size of farm cultivated, government financial support, access to extension services and farmer’s membership of cooperatives. Concerning the impact of output market participation on welfare of smallholders, the Average Treatment on the Treated (ATT) as the measure of change revealed that participation in output markets has a positive impact on welfare of the smallholder farmers through increased incomes. Farmers who participated in output market were at least R838.44 better off than those who did not participate in markets although social grants and remittances made significantly higher contribution to household welfare. The study suggests that despite some improvements in income of market participants, the standards of living of the rural households are still far from what would be considered optimal. Crop farming evidently contributes less than desired, hence the persistence of the widespread poverty. It is urgent to focus interventions on improving agricultural productivity while widening strategies for improving rural livelihoods beyond agriculture to diversify the choices open to rural dwellers. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-06
- Authors: Lesala, Mahali Elizabeth https://orcid.org/0000-0001-9921-2190
- Date: 2021-06
- Subjects: Farms, Small , Economic development -- South Africa , Agriculture -- Economic aspects -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20916 , vital:46745
- Description: The low market participation of smallholder farmers in markets has received enormous attention from scholars, both in the country and the Eastern Cape Province. However, it is not clear how low their market participation is including its implications on farmer’s welfare. The purpose of the study was to determine the extent to which smallholder farmers in the homelands of the Eastern Cape participate in output markets and assess how their participation in markets has affected wellbeing of their households. This information will have important practical implications for policy regarding appropriate pathways for poverty alleviation and livelihoods improvements in the rural areas of the Eastern Cape Province. Three irrigation schemes; Qamata, Zanyokwe and Tyefu irrigation schemes were selected for this study. A sample of 210 smallholder irrigators were interviewed by means of a close-ended questionnaire. The data were analysed by means of descriptive statistical tools, the multiple-level choice models and the Propensity Score Matching (PSM) technique. SPSS and STATA computer programmes were used to carry out all the estimations. The analysis established that, although agriculture is the primary activity for rural livelihoods, it is not the main contributor to family income. Rather, remittances and social grants were the dominant sources of household income in the Qamata, Zanyokwe and Tyefu areas. From the standpoint of market, maize and potatoes are the most popular crops, but potatoes dominate the market. This result confirms that maize is the staple crop and therefore mostly grown for home consumption while production of potatoes is market-oriented. The Market Participation Index (MPI) revealed that farmers sell at least 55 percent of their farm produce, implying that farmers have made some transition from subsistence to semi-commercial farming. However, farmers’ priority still remains food self-sufficiency and market participation only takes place after satisfying their home food needs. The results revealed that the significant factors influencing the farmers’ decisions and their extent of participation in output markets were the age, gender, marital status of the household head, primary occupation of household head, size of farm cultivated, government financial support, access to extension services and farmer’s membership of cooperatives. Concerning the impact of output market participation on welfare of smallholders, the Average Treatment on the Treated (ATT) as the measure of change revealed that participation in output markets has a positive impact on welfare of the smallholder farmers through increased incomes. Farmers who participated in output market were at least R838.44 better off than those who did not participate in markets although social grants and remittances made significantly higher contribution to household welfare. The study suggests that despite some improvements in income of market participants, the standards of living of the rural households are still far from what would be considered optimal. Crop farming evidently contributes less than desired, hence the persistence of the widespread poverty. It is urgent to focus interventions on improving agricultural productivity while widening strategies for improving rural livelihoods beyond agriculture to diversify the choices open to rural dwellers. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-06
Portrayals of masculinity in selected Nigerian plays
- Authors: Onuoha, Beatrice Nwawuloke
- Date: 2021-06
- Subjects: Masculinity in literature , Nigeria -- In literature
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22131 , vital:51985
- Description: This work critically interrogates the portrayal of masculinity in plays written by both male and female Nigerian playwrights. Selected plays (three from each author) of Wole Soyinka, Femi Osofisan, Tess Onwueme and Tracie Utoh-Ezeajugh were studied in order to proffer answers to certain critical questions, some of which include determining whether the way male playwrights construct the psychosocial temperament of lead male characters differs from how such is depicted in the works of female authors. The study also sought to ascertain how the concept of masculinity has evolved through the careers of three generations of playwriting in Nigeria. While evaluating the differences that exist in the portrayal of masculinity in the male lead characters in the works of selected male playwrights when compared to those of their female counterparts, the study equally examines the portrayals of male identities in the selected texts. It also evaluates the notion of masculinity shift among the three generations of Nigerian playwrights with a view to ascertaining how textual portrayals of characters and events reflect the changing values that are held about male identities in different Nigerian societies. In executing these objectives, the study adopts a qualitative method, and then eclectically employs Raewyn Connell’s (1995) Theory of Masculinity, Judith Butler’s (1990) Theory of Performativity, and Louis Athan Althusser’s (1970) Idea of Interpellation as the Theoretical Framework to guide the analysis and interpretation of the selected texts. Furthermore, the study follows a constructivist model that involves several stages including the identification of the selected plays as the main texts, a perusal of the plays, review of the literature on gender portrayals in the plays, and a critiquing of the portrayal of masculinity in them. The findings of the analysis reveal that masculinity is a conditional, provisional and elusive subject. It is created in a certain socio-cultural and historical context and evolves according to situations. The studied texts demonstrate the artistic agency of women in constructing men’s masculinity. They imply that masculinity and femininity are like Siamese twins in the building of a peaceful, strong, and new nation. Moreover, the playwrights under study divulge that power is the key factor in (de)constructing and (re)defining of masculinity of men. Through their plays, the dramatists challenge and attempt to change the stereotypical constructs of men, dismantle the traditional gender roles and propose a new way of envisioning gender, where hegemonic principles can be nullified. It is therefore the submission of this work that Soyinka, Osofisan, Onwueme and Utoh-Ezeajugh do not affirm the social construct of masculinity but rather interrogate them. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-06
- Authors: Onuoha, Beatrice Nwawuloke
- Date: 2021-06
- Subjects: Masculinity in literature , Nigeria -- In literature
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22131 , vital:51985
- Description: This work critically interrogates the portrayal of masculinity in plays written by both male and female Nigerian playwrights. Selected plays (three from each author) of Wole Soyinka, Femi Osofisan, Tess Onwueme and Tracie Utoh-Ezeajugh were studied in order to proffer answers to certain critical questions, some of which include determining whether the way male playwrights construct the psychosocial temperament of lead male characters differs from how such is depicted in the works of female authors. The study also sought to ascertain how the concept of masculinity has evolved through the careers of three generations of playwriting in Nigeria. While evaluating the differences that exist in the portrayal of masculinity in the male lead characters in the works of selected male playwrights when compared to those of their female counterparts, the study equally examines the portrayals of male identities in the selected texts. It also evaluates the notion of masculinity shift among the three generations of Nigerian playwrights with a view to ascertaining how textual portrayals of characters and events reflect the changing values that are held about male identities in different Nigerian societies. In executing these objectives, the study adopts a qualitative method, and then eclectically employs Raewyn Connell’s (1995) Theory of Masculinity, Judith Butler’s (1990) Theory of Performativity, and Louis Athan Althusser’s (1970) Idea of Interpellation as the Theoretical Framework to guide the analysis and interpretation of the selected texts. Furthermore, the study follows a constructivist model that involves several stages including the identification of the selected plays as the main texts, a perusal of the plays, review of the literature on gender portrayals in the plays, and a critiquing of the portrayal of masculinity in them. The findings of the analysis reveal that masculinity is a conditional, provisional and elusive subject. It is created in a certain socio-cultural and historical context and evolves according to situations. The studied texts demonstrate the artistic agency of women in constructing men’s masculinity. They imply that masculinity and femininity are like Siamese twins in the building of a peaceful, strong, and new nation. Moreover, the playwrights under study divulge that power is the key factor in (de)constructing and (re)defining of masculinity of men. Through their plays, the dramatists challenge and attempt to change the stereotypical constructs of men, dismantle the traditional gender roles and propose a new way of envisioning gender, where hegemonic principles can be nullified. It is therefore the submission of this work that Soyinka, Osofisan, Onwueme and Utoh-Ezeajugh do not affirm the social construct of masculinity but rather interrogate them. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-06
The role of cooperatives in local economic development in Buffalo City Metropolitan Municipality: A participatory monitoring and evaluation approach
- Gxabuza, Fundiswa https://orcid.org/0000-0003-2654-7365
- Authors: Gxabuza, Fundiswa https://orcid.org/0000-0003-2654-7365
- Date: 2021-06
- Subjects: Cooperative societies , Economic development , Participatory monitoring and evaluation (Project management)
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20273 , vital:45645
- Description: The goal to halve unemployment in South Africa by 2014 has remained, to date, elusive. In the particular case of the Eastern Cape Province, the challenge of combating unemployment is even more daunting, as it currently faces high unemployment rates. However, while there is evidence that initiatives to promote employment generation could be reinforced through Local Economic Development (LED) and, in particular, cooperatives, not much has been reported on how cooperatives contribute in minimising unemployment in the Province. The Department of Trade and Industry (DTI) points to the inadequacy of the Monitoring and Evaluation (M&E) of cooperatives as a critical challenge that has largely remained unaddressed. The inadequacy of M&E in respect to the role of cooperatives in employment and LED has affected cooperatives, generally, and those operating in the Eastern Cape, particularly. This study argues for a participatory approach to relevant M&E frameworks and, thus, presents a participatory monitoring and evaluation (PM&E) framework for evaluating cooperatives’ impact on LED. The testable framework for PM&E is partially derived from participatory action research (PAR) methodologies, where the researcher and cooperatives identify and define the problem to be solved. The thesis then develops the framework by integrating PM&E and PAR approaches in the evaluation of cooperatives’ role in employment creation and LED. By reviewing relevant literature, this study identified, assessed, and synthesized important elements for its suggested framework. Research on cooperatives has tended to focus on their role as agents of development, and much has already focussed on sharing relevant lessons learnt. Fewer studies have, by contrast, focussed on an engaged methodology for the evaluation of cooperatives’ efforts in development. The findings of this current study show that a PM&E/PAR framework must be a joint effort of all affected parties; where the researcher and/or facilitator assumes the role of a change agent, and where participants are leaders of the movement in the course for action. This study was based in East London, and the target population consisted of primary cooperatives. Primary cooperatives are defined by the Buffalo City Integrated Cooperative Development Strategy (BCMM ICDS, 2016) are cooperative that have at least five members, and whose aim is providing employment to said members. The research design for this study was exploratory and inductive. As noted previously, this study adopted a qualitative research approach that combined PAR and PM&E. Two sets of data collection were utilised, namely focus group interviews (FGIs) and an emailed questionnaire (EQ). The FGIs were conducted with the overall study population, namely 14 cooperatives. The EQ was given to specific individual participants, namely senior government and municipal officials who are responsible for the noted cooperatives. The underlying theoretical framework for this research was empowerment, agency, and the theory of community development. A qualitative data analysis was utilised based on the translation of meaning not frequency. The search for meaning elicited rich insights pertaining to participants’ views and interpretations. In all, this study established that the participating Eastern Cape cooperatives have not yet achieved their desired contributory role of promoting LED; specifically, in terms of job creation. , Thesis (DPhil) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-06
- Authors: Gxabuza, Fundiswa https://orcid.org/0000-0003-2654-7365
- Date: 2021-06
- Subjects: Cooperative societies , Economic development , Participatory monitoring and evaluation (Project management)
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20273 , vital:45645
- Description: The goal to halve unemployment in South Africa by 2014 has remained, to date, elusive. In the particular case of the Eastern Cape Province, the challenge of combating unemployment is even more daunting, as it currently faces high unemployment rates. However, while there is evidence that initiatives to promote employment generation could be reinforced through Local Economic Development (LED) and, in particular, cooperatives, not much has been reported on how cooperatives contribute in minimising unemployment in the Province. The Department of Trade and Industry (DTI) points to the inadequacy of the Monitoring and Evaluation (M&E) of cooperatives as a critical challenge that has largely remained unaddressed. The inadequacy of M&E in respect to the role of cooperatives in employment and LED has affected cooperatives, generally, and those operating in the Eastern Cape, particularly. This study argues for a participatory approach to relevant M&E frameworks and, thus, presents a participatory monitoring and evaluation (PM&E) framework for evaluating cooperatives’ impact on LED. The testable framework for PM&E is partially derived from participatory action research (PAR) methodologies, where the researcher and cooperatives identify and define the problem to be solved. The thesis then develops the framework by integrating PM&E and PAR approaches in the evaluation of cooperatives’ role in employment creation and LED. By reviewing relevant literature, this study identified, assessed, and synthesized important elements for its suggested framework. Research on cooperatives has tended to focus on their role as agents of development, and much has already focussed on sharing relevant lessons learnt. Fewer studies have, by contrast, focussed on an engaged methodology for the evaluation of cooperatives’ efforts in development. The findings of this current study show that a PM&E/PAR framework must be a joint effort of all affected parties; where the researcher and/or facilitator assumes the role of a change agent, and where participants are leaders of the movement in the course for action. This study was based in East London, and the target population consisted of primary cooperatives. Primary cooperatives are defined by the Buffalo City Integrated Cooperative Development Strategy (BCMM ICDS, 2016) are cooperative that have at least five members, and whose aim is providing employment to said members. The research design for this study was exploratory and inductive. As noted previously, this study adopted a qualitative research approach that combined PAR and PM&E. Two sets of data collection were utilised, namely focus group interviews (FGIs) and an emailed questionnaire (EQ). The FGIs were conducted with the overall study population, namely 14 cooperatives. The EQ was given to specific individual participants, namely senior government and municipal officials who are responsible for the noted cooperatives. The underlying theoretical framework for this research was empowerment, agency, and the theory of community development. A qualitative data analysis was utilised based on the translation of meaning not frequency. The search for meaning elicited rich insights pertaining to participants’ views and interpretations. In all, this study established that the participating Eastern Cape cooperatives have not yet achieved their desired contributory role of promoting LED; specifically, in terms of job creation. , Thesis (DPhil) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-06
Theme and protest in the South African post-apartheid novel: a case study of the writings of three black South African novelists
- Moyo, Mbongeni https://orcid.org/0000-0003-2256-9671
- Authors: Moyo, Mbongeni https://orcid.org/0000-0003-2256-9671
- Date: 2021-06
- Subjects: Postcolonialism in literature , Apartheid in literature , Protest literature, South African (English)
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22023 , vital:51937
- Description: This study analyses a selected cohort of black South African novelists‟ depiction of the real burning issues of the post-Apartheid South Africa. The ideas that the study is concerned with in the novel under study, are based on the aspect of theme and how it is utilised by the respective authors to address the social, economic and political issues in the post-Apartheid South Africa. The study is an investigation of the extent to which black South African novelists have depicted the aforementioned issues. The research highlights those issues that the novels under study addressed and continues by revealing how the authors depict these issues in their texts. Moreover, the study concludes that literature has a role to play in the society and recommends that it should be reliable and useful to the society. It further recommends that literature should not ignore societal issues and should be corrective in its approach. The study is comprised of six chapters: Chapter One functions as an introduction to the study. It provides information on the aims and objectives of the study, the background information on the novels under study and South African literature itself. The chapter also outlines the method and the theories, which will be used in the study. It concludes by addressing the significance of the study. Chapter Two provides a detailed analysis of the theories, which will be used in the study. This includes the Marxism and Realism theory, Afrocentric theory and the Feminist Literary theory. It also defines the concept of theme and outlines its characteristics. It discusses post-colonial literature and its development in Africa. The chapter will conclude with a disclosure of the role of theme and of the author in the African novel. Chapter Three addresses the depiction of burning issues in Mpe‟s novel “Welcome to Our Hillbrow”. It discusses the real post-colonial challenges confronting the society during the post-Apartheid South Africa. It determines whether the novel under study adequately addresses these issues. Chapter Four identifies and addresses the depiction of burning post-colonial issues in Magona‟s novel “Beauty‟s Gift”. It unveils the themes that are dealt with in the novel under study thereby linking them effectively to the current situation in the new South Africa. Chapter Five unveils the central themes in Mahala‟s Novel “When a Man Cries” and it illustrates how the author protests against the ills of post-Apartheid South Africa. Chapter Six serves as the conclusion of the study and brings out the findings and recommendations of the study. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-06
- Authors: Moyo, Mbongeni https://orcid.org/0000-0003-2256-9671
- Date: 2021-06
- Subjects: Postcolonialism in literature , Apartheid in literature , Protest literature, South African (English)
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22023 , vital:51937
- Description: This study analyses a selected cohort of black South African novelists‟ depiction of the real burning issues of the post-Apartheid South Africa. The ideas that the study is concerned with in the novel under study, are based on the aspect of theme and how it is utilised by the respective authors to address the social, economic and political issues in the post-Apartheid South Africa. The study is an investigation of the extent to which black South African novelists have depicted the aforementioned issues. The research highlights those issues that the novels under study addressed and continues by revealing how the authors depict these issues in their texts. Moreover, the study concludes that literature has a role to play in the society and recommends that it should be reliable and useful to the society. It further recommends that literature should not ignore societal issues and should be corrective in its approach. The study is comprised of six chapters: Chapter One functions as an introduction to the study. It provides information on the aims and objectives of the study, the background information on the novels under study and South African literature itself. The chapter also outlines the method and the theories, which will be used in the study. It concludes by addressing the significance of the study. Chapter Two provides a detailed analysis of the theories, which will be used in the study. This includes the Marxism and Realism theory, Afrocentric theory and the Feminist Literary theory. It also defines the concept of theme and outlines its characteristics. It discusses post-colonial literature and its development in Africa. The chapter will conclude with a disclosure of the role of theme and of the author in the African novel. Chapter Three addresses the depiction of burning issues in Mpe‟s novel “Welcome to Our Hillbrow”. It discusses the real post-colonial challenges confronting the society during the post-Apartheid South Africa. It determines whether the novel under study adequately addresses these issues. Chapter Four identifies and addresses the depiction of burning post-colonial issues in Magona‟s novel “Beauty‟s Gift”. It unveils the themes that are dealt with in the novel under study thereby linking them effectively to the current situation in the new South Africa. Chapter Five unveils the central themes in Mahala‟s Novel “When a Man Cries” and it illustrates how the author protests against the ills of post-Apartheid South Africa. Chapter Six serves as the conclusion of the study and brings out the findings and recommendations of the study. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-06
An analysis of orthographic errors in isiXhosa texts: a case of grade 11 isiXhosa home language (l1) in the Western Cape
- Authors: Titi, Nonzolo
- Date: 2021-05
- Subjects: Language and languages -- Orthography and spelling
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22210 , vital:51998
- Description: This case study reveals that the written language of a group of Grade 11 isiXhosa first language (L1) learners presents errors which seem to have serious implications for their linguistic competence, performance in their learning, language development and language conservation. These errors include different regular language components, such as grammar, spelling, word division, punctuation, vocabulary, capitalization, syntax and semantics. Additional to these errors are the newly discovered categories of anomalies, such as new lexical items, incomplete words, incorrect word construction, inter-categorical range, multiple deviations and writing inconsistencies. The writing of these learners not only reflects various orthographic errors and inconsistency in their usage of isiXhosa, which translates into language deficiency, but also implies gaps within the education system and its policies, as well as inefficient isiXhosa curriculum design as some of the factors contributing to the existence of these errors. Possible causes of these errors include educational causes; lack of orthographic knowledge and limited reading, socio-cultural causes; interference of other languages and the influence of the media, and attitudinal causes; lack of respect and contempt for the language and lack of learner interest in the language. Adopting a combined mixed method with a predominantly qualitative approach, this study examines errors presented in the writings of Grade 11 isiXhosa L1 learners with a view to establishing the nature and scope of these errors. The key objectives of this study were investigated by means of scientific papers both published and publishable as book chapters, books, dissertations, education policies, online publications and journal articles - both international and accredited journals. Drawing on various conceptual and analytical frameworks (Hymes 1972; Corder 1981), the study scrutinizes the contents and presents observations of the elements and themes that emanate from the eighteen (18) learners’ isiXhosa essays and seven (7) voice-recorded isiXhosa teachers and subject advisers’ interviews which were used as data. Findings reveal that learners struggle to master some language aspects, with their usage reflecting serious deviations from the standard orthography. These findings have serious implications for language teaching and learning as these errors tend to affect the learners’ linguistic competence and performance, language development, as well as language conservation. Also, serious violations of the standard orthographic rules are noticeable; and this observation raises concerns about the fate and sustainability of the language. It is recommended that interventions and strategies be applied in respect of the teaching and learning of isiXhosa in order to maintain its standard orthography, to preserve the language, improve the learning and teaching of the language, maintain communicative competence and facilitate appropriate application of the language in a learning context, especially in speaking and writing. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-05
- Authors: Titi, Nonzolo
- Date: 2021-05
- Subjects: Language and languages -- Orthography and spelling
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22210 , vital:51998
- Description: This case study reveals that the written language of a group of Grade 11 isiXhosa first language (L1) learners presents errors which seem to have serious implications for their linguistic competence, performance in their learning, language development and language conservation. These errors include different regular language components, such as grammar, spelling, word division, punctuation, vocabulary, capitalization, syntax and semantics. Additional to these errors are the newly discovered categories of anomalies, such as new lexical items, incomplete words, incorrect word construction, inter-categorical range, multiple deviations and writing inconsistencies. The writing of these learners not only reflects various orthographic errors and inconsistency in their usage of isiXhosa, which translates into language deficiency, but also implies gaps within the education system and its policies, as well as inefficient isiXhosa curriculum design as some of the factors contributing to the existence of these errors. Possible causes of these errors include educational causes; lack of orthographic knowledge and limited reading, socio-cultural causes; interference of other languages and the influence of the media, and attitudinal causes; lack of respect and contempt for the language and lack of learner interest in the language. Adopting a combined mixed method with a predominantly qualitative approach, this study examines errors presented in the writings of Grade 11 isiXhosa L1 learners with a view to establishing the nature and scope of these errors. The key objectives of this study were investigated by means of scientific papers both published and publishable as book chapters, books, dissertations, education policies, online publications and journal articles - both international and accredited journals. Drawing on various conceptual and analytical frameworks (Hymes 1972; Corder 1981), the study scrutinizes the contents and presents observations of the elements and themes that emanate from the eighteen (18) learners’ isiXhosa essays and seven (7) voice-recorded isiXhosa teachers and subject advisers’ interviews which were used as data. Findings reveal that learners struggle to master some language aspects, with their usage reflecting serious deviations from the standard orthography. These findings have serious implications for language teaching and learning as these errors tend to affect the learners’ linguistic competence and performance, language development, as well as language conservation. Also, serious violations of the standard orthographic rules are noticeable; and this observation raises concerns about the fate and sustainability of the language. It is recommended that interventions and strategies be applied in respect of the teaching and learning of isiXhosa in order to maintain its standard orthography, to preserve the language, improve the learning and teaching of the language, maintain communicative competence and facilitate appropriate application of the language in a learning context, especially in speaking and writing. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2021-05
Aspects of the ecology of the estuarine round-herring Gilchristella aestuaria (Pisces: Clupeidae) and its small-scale fishery potential
- Zvavahera, Munetsi https://orcid.org/0000-0002-5337-1943
- Authors: Zvavahera, Munetsi https://orcid.org/0000-0002-5337-1943
- Date: 2021-05
- Subjects: Small-scale fisheries , Silversides
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22765 , vital:52752
- Description: In the past two decades, there has been increasing pressure for small-scale inland fisheries to play a central role in food and nutrient security for poor communities in South Africa. For decades, South African inland fisheries have focussed on the exploitation of large fish species and generally ignored the exploitation of inland small fish species (SFS). This research aimed to assess the ecology and small-scale fishery potential of the estuarine round-herring, Gilchristella aestuaria. To understand the ecology of G. aestuaria better, morphometric trait analysis and fish condition of populations in relation to environmental variables (salinity, pH, temperature, turbidity and chlorophyll-a) were done. Fish were supplemented with samples acquired from the SAIAB collection facility for 14 sites to cover all the three South African biogeographic regions, stretching from Lake Sibaya (KZN) to the Orange River estuary in the western parts of the country. The morphometric trait analysis showed that G. aestuaria populations can be distinguished based on the trait variation, however there were many overlaps for populations that are interconnected, with distant/ geographically separated populations showing clear differences. Morphometric traits of the G. aestuaria population were significantly different, however there was no strong directional relationship with environmental variables and variation in morphometric traits. However, fish condition as measured by Fulton’s condition (K) and relative weight (Wr) showed variation between populations found in different environments. These differences suggest that these populations must be managed differently if G. aestuaria is to be exploited in managed fisheries. To determine the potential nutrient value of G. aestuaria to the human diet, samples from two freshwater sites and five estuarine sites were analysed for essential macro and micronutrients. The nutrient content of G. aestuaria revealed there is potential for exploitation, as the species has a high macro (protein and fat) and micronutrient composition (calcium, iron and zinc). Mean ± SD of selected nutrients were protein (61.7±5.0 g/100g), fat (20.4±3.7g/ 100g), calcium (3507.5±314.0mg), iron (40.37±14.0mg/ 100g), zinc (22.47±5.6mg/ 100) and vitamin A (37.3±44.4 RAE/ 100g). The nutrient composition of fish collected from freshwater sites was comparable to those collected from estuarine environments. Using the recommended dietary allowances (RDA) from literature, the mass of fish and the number of fish that would provide a minimum amount for each nutrient were calculated. A child would require only 13.4g of dry G. aestuaria or approximately 74 dried fish to meet the daily requirements of zinc. Other minerals such as iron and calcium also showed a similar low weight or number of fish required to meet daily requirements for the different categories. A small number of G. aestuaria are needed to meet RDA for groups (children, adult men, adult women, pregnant women and lactating mothers). A comparison was done for the nutrient composition of G. aestuaria with reference species that are already harvested for human consumption in some African and Asian countries. The protein content of G. aestuaria was comparable to Chisense (Microthrissa moeruensis) and Kapenta Limnothrissa miodon), while the fat composition was more than twice Chisense and Kapenta. Comparing the mineral composition, G. aestuaria had more than three times higher calcium than Mola (Amblypharyngodon mola) and Puti (Puntius sophore). Zinc composition was four times higher than M. moeruensis and L. miodon. Further exploration of the ecology of G. aestuaria was studied using the Sundays River irrigations ponds as a case study that would represent small impoundments across South Africa. Species rank abundance curve and catch per unit effort (CPUE) on the Sundays Irrigation ponds revealed that G. aestuaria dominated numerically and biomass in the Sundays River irrigation ponds. To assess the potential of harvesting G. aestuaria harvesting experiments were conducted using depletion (removal) sampling. Catchweight (kg) ranged from 2.16 (1.03; 3.28) to 61.25 (44.40; 78.09) kg and the estimated biomass from the depletion model ranged from 1.05 to 40.19 kg/ha for September 2019. The depletion model revealed that small impoundments have high biomass per hectare of G. aestuaria ranging from which indicates that the species may not support a commercial fishery but small-scale fisheries. In conclusion, G. aestuaria could become a meaningful contribution to the food and nutrient security of poor communities where available as a food source through small-scale fishery exploitation. The extent of this contribution may depend on its production potential in various regions and environments. More research is however needed to determine the long-term sustainability of harvesting of G aestuaria by looking at how populations respond to harvesting. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-05
- Authors: Zvavahera, Munetsi https://orcid.org/0000-0002-5337-1943
- Date: 2021-05
- Subjects: Small-scale fisheries , Silversides
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22765 , vital:52752
- Description: In the past two decades, there has been increasing pressure for small-scale inland fisheries to play a central role in food and nutrient security for poor communities in South Africa. For decades, South African inland fisheries have focussed on the exploitation of large fish species and generally ignored the exploitation of inland small fish species (SFS). This research aimed to assess the ecology and small-scale fishery potential of the estuarine round-herring, Gilchristella aestuaria. To understand the ecology of G. aestuaria better, morphometric trait analysis and fish condition of populations in relation to environmental variables (salinity, pH, temperature, turbidity and chlorophyll-a) were done. Fish were supplemented with samples acquired from the SAIAB collection facility for 14 sites to cover all the three South African biogeographic regions, stretching from Lake Sibaya (KZN) to the Orange River estuary in the western parts of the country. The morphometric trait analysis showed that G. aestuaria populations can be distinguished based on the trait variation, however there were many overlaps for populations that are interconnected, with distant/ geographically separated populations showing clear differences. Morphometric traits of the G. aestuaria population were significantly different, however there was no strong directional relationship with environmental variables and variation in morphometric traits. However, fish condition as measured by Fulton’s condition (K) and relative weight (Wr) showed variation between populations found in different environments. These differences suggest that these populations must be managed differently if G. aestuaria is to be exploited in managed fisheries. To determine the potential nutrient value of G. aestuaria to the human diet, samples from two freshwater sites and five estuarine sites were analysed for essential macro and micronutrients. The nutrient content of G. aestuaria revealed there is potential for exploitation, as the species has a high macro (protein and fat) and micronutrient composition (calcium, iron and zinc). Mean ± SD of selected nutrients were protein (61.7±5.0 g/100g), fat (20.4±3.7g/ 100g), calcium (3507.5±314.0mg), iron (40.37±14.0mg/ 100g), zinc (22.47±5.6mg/ 100) and vitamin A (37.3±44.4 RAE/ 100g). The nutrient composition of fish collected from freshwater sites was comparable to those collected from estuarine environments. Using the recommended dietary allowances (RDA) from literature, the mass of fish and the number of fish that would provide a minimum amount for each nutrient were calculated. A child would require only 13.4g of dry G. aestuaria or approximately 74 dried fish to meet the daily requirements of zinc. Other minerals such as iron and calcium also showed a similar low weight or number of fish required to meet daily requirements for the different categories. A small number of G. aestuaria are needed to meet RDA for groups (children, adult men, adult women, pregnant women and lactating mothers). A comparison was done for the nutrient composition of G. aestuaria with reference species that are already harvested for human consumption in some African and Asian countries. The protein content of G. aestuaria was comparable to Chisense (Microthrissa moeruensis) and Kapenta Limnothrissa miodon), while the fat composition was more than twice Chisense and Kapenta. Comparing the mineral composition, G. aestuaria had more than three times higher calcium than Mola (Amblypharyngodon mola) and Puti (Puntius sophore). Zinc composition was four times higher than M. moeruensis and L. miodon. Further exploration of the ecology of G. aestuaria was studied using the Sundays River irrigations ponds as a case study that would represent small impoundments across South Africa. Species rank abundance curve and catch per unit effort (CPUE) on the Sundays Irrigation ponds revealed that G. aestuaria dominated numerically and biomass in the Sundays River irrigation ponds. To assess the potential of harvesting G. aestuaria harvesting experiments were conducted using depletion (removal) sampling. Catchweight (kg) ranged from 2.16 (1.03; 3.28) to 61.25 (44.40; 78.09) kg and the estimated biomass from the depletion model ranged from 1.05 to 40.19 kg/ha for September 2019. The depletion model revealed that small impoundments have high biomass per hectare of G. aestuaria ranging from which indicates that the species may not support a commercial fishery but small-scale fisheries. In conclusion, G. aestuaria could become a meaningful contribution to the food and nutrient security of poor communities where available as a food source through small-scale fishery exploitation. The extent of this contribution may depend on its production potential in various regions and environments. More research is however needed to determine the long-term sustainability of harvesting of G aestuaria by looking at how populations respond to harvesting. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-05