Phemba Mfundi Journal 2014
- Nelson Mandela Institute for Education and Rural Development
- Authors: Nelson Mandela Institute for Education and Rural Development
- Date: 2014
- Subjects: Poetry -- Imibongo , English Short Stories -- Amabali Amafutshane , Teacher's Section -- Icandelo Lootitshala
- Language: English
- Identifier: vital:12215 , http://hdl.handle.net/10353/d1013022 , Poetry -- Imibongo , English Short Stories -- Amabali Amafutshane , Teacher's Section -- Icandelo Lootitshala
- Full Text:
- Authors: Nelson Mandela Institute for Education and Rural Development
- Date: 2014
- Subjects: Poetry -- Imibongo , English Short Stories -- Amabali Amafutshane , Teacher's Section -- Icandelo Lootitshala
- Language: English
- Identifier: vital:12215 , http://hdl.handle.net/10353/d1013022 , Poetry -- Imibongo , English Short Stories -- Amabali Amafutshane , Teacher's Section -- Icandelo Lootitshala
- Full Text:
Diet of the yellow mongoose (Cynictis penicillata) in the Albany Thicket Biome of South Africa
- Authors: Bizani, Mfundo
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Zoology)
- Identifier: vital:11796 , http://hdl.handle.net/10353/d1019840
- Description: The dietary habits of the yellow mongoose Cynictis penicillata were studied in the Albany Thicket Biome of South Africa (Great Fish River Reserve, Eastern Cape). The diet was investigated through the analysis of 1,056 scats that were sampled over a period of 7 years (2005−2009 and 2011−2012) mainly in three similar sites (Kelarny, Grasslands and Junction 10) that were used by at least three families or groups of yellow mongooses. Scats were collected near latrine sites, labelled and stored in a freezer. In the laboratory, scats were oven dried for a period of 24 hours at 50 C. Diet was determined by identifying undigested food remains in the scats. Hair samples were examined under the compound microscope to identify which mammals were ingested. In the field, both arthropod and small mammal abundance were determined in order to evaluate whether yellow mongooses are opportunistic or specialist feeders. Furthermore, inter-annual (2006–2008) and inter-group/inter-site variations in the diet were assessed. Based on faecal analysis, arthropods were the principal prey, while small mammals acted as supplementary food item. Other food categories like vegetation, reptiles and birds were only ingested or preyed upon infrequently. Intermediate dietary diversity, and low standardised diet breadth indices were obtained for all seasons, as well as for the whole sampling period. The diet overlaps calculated for pairs of seasons were very high and did not differ substantially. However, the diet of the yellow mongoose varied seasonally, yearly and between groups (sites), mostly due to variations in arthropod and small mammal consumption. Food availability displayed an increase in biomass of both small mammals and arthropods in summer and autumn. Results obtained in this study could suggest that the yellow mongoose at the GFRR is insectivorous by preferring to feed on insects (and arthropods in general) when both insects and rodents are abundant. However the fact that its diet varies both seasonally, yearly and locally, as well as the presence of remains of other food categories in the scats, indicates that this species is rather an opportunistic, generalist feeder than an insect specialist.
- Full Text:
- Authors: Bizani, Mfundo
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Zoology)
- Identifier: vital:11796 , http://hdl.handle.net/10353/d1019840
- Description: The dietary habits of the yellow mongoose Cynictis penicillata were studied in the Albany Thicket Biome of South Africa (Great Fish River Reserve, Eastern Cape). The diet was investigated through the analysis of 1,056 scats that were sampled over a period of 7 years (2005−2009 and 2011−2012) mainly in three similar sites (Kelarny, Grasslands and Junction 10) that were used by at least three families or groups of yellow mongooses. Scats were collected near latrine sites, labelled and stored in a freezer. In the laboratory, scats were oven dried for a period of 24 hours at 50 C. Diet was determined by identifying undigested food remains in the scats. Hair samples were examined under the compound microscope to identify which mammals were ingested. In the field, both arthropod and small mammal abundance were determined in order to evaluate whether yellow mongooses are opportunistic or specialist feeders. Furthermore, inter-annual (2006–2008) and inter-group/inter-site variations in the diet were assessed. Based on faecal analysis, arthropods were the principal prey, while small mammals acted as supplementary food item. Other food categories like vegetation, reptiles and birds were only ingested or preyed upon infrequently. Intermediate dietary diversity, and low standardised diet breadth indices were obtained for all seasons, as well as for the whole sampling period. The diet overlaps calculated for pairs of seasons were very high and did not differ substantially. However, the diet of the yellow mongoose varied seasonally, yearly and between groups (sites), mostly due to variations in arthropod and small mammal consumption. Food availability displayed an increase in biomass of both small mammals and arthropods in summer and autumn. Results obtained in this study could suggest that the yellow mongoose at the GFRR is insectivorous by preferring to feed on insects (and arthropods in general) when both insects and rodents are abundant. However the fact that its diet varies both seasonally, yearly and locally, as well as the presence of remains of other food categories in the scats, indicates that this species is rather an opportunistic, generalist feeder than an insect specialist.
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Uhlalutyo lwenoveli kamahala ethi: yakhal’ indoda (2010).
- Authors: Nyiki, Phumelela Sibahle
- Date: 2020
- Subjects: Literature
- Language: English
- Type: Thesis , Masters , MA (African Languages)
- Identifier: http://hdl.handle.net/10353/18257 , vital:42246
- Description: The aim and scope of this study is to analyse the novel Yakhal’ Indoda (2010) written by Siphiwo Mahala. Since this book was written in the period known as the modern times in the new South Africa, it therefore tends to focus on the issues that disturb the peace of the citizens of South Africa exactly in this period of democratic South Africa. For that reason, the objective of this study is to associate the factors which Mahala has written about with those that are found in the contemporary South Africa which are regarded as issues disturbing the lives of South Africans at present. As it is of importance before the researcher deals with the central issue, there has to be a thorough knowledge of the theory of the subject that is being discussed at hand. The Literature Review with regard to this study takes into account the books written by Satyo, Duka, Brooks and Warren, to mention just a few. These authors, from their different academic perspectives, do their best on explaining the theory of the issues that will be discussed in this study. The Theoretical Framework that will be used in this study consists of the views of the writers who fought for a better political dispensation in the countries that were previously colonized. In this regard, the views of Ngùgì wa Thiong’o, and those of Steve Biko will be assessed in this study. The method that will be used in conducting this research is none other than that of Text Analysis. This simply means the researching student will focus mainly on the books found at the UFH library and other libraries. The chapter titles and their relevant outlines follow below: Chapter One is an introduction for this entire research. This chapter focuses more on the aims of this study, the importance or significance, limitations, methodology to be followed. Furthermore, this chapter gives a brief background of the author of the novel that will be analysed as well as the background of the novel. Chapter Two focuses on the theory of this research. This will be done through two theories. The researcher will first present a theory of the novel, as well as the Postcolonial theory. Under the novel theory, the researcher will discuss some vii features of the novel. However, the researcher’s emphasis will be on the theme that underlies in Mahala’s novel, Yakhal’ Indoda (2010). Chapter Three focuses on the theme of this research. The researcher will analyse the way Mahala portrays crime, corruption, unemployment and poverty in his novel. The researcher then will validate Mahala’s point of view against other authors with regards to the identified problems. Chapter Four focuses on the problems found in the Department of Education as well as rights of women as depicted in Mahala’s novel, Yakhal’ Indoda (2010). This will be accomplished through validation of the experienced and witnessed events in the new South Africa. Chapter Five focuses on the factors and events that are commonly associated with the Departments of Health and in Local Government, which are life threatening to society. This will be done by the researcher, pointing out some problems that Mahala in his book Yakhal’ Indoda (2010) attributes to the mentioned departments. Chapter Six is the general conclusion and exegesis on the study. This chapter gives a brief summary of the previous chapters, the findings regarding this study.
- Full Text:
- Authors: Nyiki, Phumelela Sibahle
- Date: 2020
- Subjects: Literature
- Language: English
- Type: Thesis , Masters , MA (African Languages)
- Identifier: http://hdl.handle.net/10353/18257 , vital:42246
- Description: The aim and scope of this study is to analyse the novel Yakhal’ Indoda (2010) written by Siphiwo Mahala. Since this book was written in the period known as the modern times in the new South Africa, it therefore tends to focus on the issues that disturb the peace of the citizens of South Africa exactly in this period of democratic South Africa. For that reason, the objective of this study is to associate the factors which Mahala has written about with those that are found in the contemporary South Africa which are regarded as issues disturbing the lives of South Africans at present. As it is of importance before the researcher deals with the central issue, there has to be a thorough knowledge of the theory of the subject that is being discussed at hand. The Literature Review with regard to this study takes into account the books written by Satyo, Duka, Brooks and Warren, to mention just a few. These authors, from their different academic perspectives, do their best on explaining the theory of the issues that will be discussed in this study. The Theoretical Framework that will be used in this study consists of the views of the writers who fought for a better political dispensation in the countries that were previously colonized. In this regard, the views of Ngùgì wa Thiong’o, and those of Steve Biko will be assessed in this study. The method that will be used in conducting this research is none other than that of Text Analysis. This simply means the researching student will focus mainly on the books found at the UFH library and other libraries. The chapter titles and their relevant outlines follow below: Chapter One is an introduction for this entire research. This chapter focuses more on the aims of this study, the importance or significance, limitations, methodology to be followed. Furthermore, this chapter gives a brief background of the author of the novel that will be analysed as well as the background of the novel. Chapter Two focuses on the theory of this research. This will be done through two theories. The researcher will first present a theory of the novel, as well as the Postcolonial theory. Under the novel theory, the researcher will discuss some vii features of the novel. However, the researcher’s emphasis will be on the theme that underlies in Mahala’s novel, Yakhal’ Indoda (2010). Chapter Three focuses on the theme of this research. The researcher will analyse the way Mahala portrays crime, corruption, unemployment and poverty in his novel. The researcher then will validate Mahala’s point of view against other authors with regards to the identified problems. Chapter Four focuses on the problems found in the Department of Education as well as rights of women as depicted in Mahala’s novel, Yakhal’ Indoda (2010). This will be accomplished through validation of the experienced and witnessed events in the new South Africa. Chapter Five focuses on the factors and events that are commonly associated with the Departments of Health and in Local Government, which are life threatening to society. This will be done by the researcher, pointing out some problems that Mahala in his book Yakhal’ Indoda (2010) attributes to the mentioned departments. Chapter Six is the general conclusion and exegesis on the study. This chapter gives a brief summary of the previous chapters, the findings regarding this study.
- Full Text:
Igalelo loncwadi lwandulo ku-Ithemba liyaphilisa ka-W.K. Tamsanqa no-Ingqumbo yeminyanya ka- A. C. Jordan
- Authors: Ganto, Diniwe Joyce
- Date: 2013
- Language: Xhosa
- Type: Thesis , Masters , MA (African Languages)
- Identifier: vital:11150 , http://hdl.handle.net/10353/d1013014
- Description: Olu phando luqwalasela nzulu igalelo loncwadi lwandulo kolwanamhla uncwadi. Kubalulekile ukuba kwenziwe oku kuba ugxudululu lwabahlalutyi boncwadi lwesiXhosa bakholisa ukukhumathela ekukhangeleni ifuthe loncwadi lwaseNtshona kuncwadi lwesiXhosa, babe bona abahlalutyi abagrombonca igalelo loncwadi lwandulo kolwanamhla (kwisiXhosa) benqongophele. Nemingqandandana ekhoyo yophando oselwenziwe kuncwadi lwesiXhosa ikholisa ukukhangela ifuthe, lona uphando olungegalelo loncwadi lwandulo kolwanamhla lunqongophele. Iincwadi endiphengulula zona kulo msebenzi yile kaJordan (Ingqumbo Yeminyanya), nekaTamsanqa (Ithemba Liyaphilisa). Indlela endiwuhlahlube ngayo lo msebenzi wophengululo ingolu hlobo: Isahluko sokuqala yimbulambethe edandalazisa iindlela-ndlela endiza kuchankcatha ngazo ukugrombonca eli galelo loncwadi lwandulo kolwanamhla. Isahluko sesibini siza kugrombonca imigqaliselo ekwakuchancathwa kuyo endulo xa kuyilwa amabalana omthonyama. Ndibuye ndifunxe ulwazi olunzulu ngala mabali andulo. Isahluko sesithathu siza kukhukhuza sikhangele ezi ncwadi zimbini Ingqumbo Yeminyanya ne Ithemba Liyaphilisa ukuba ezi zithako nala mabali andulo asetyenziswe njani na kuzo. Isahluko sesine siza kutwabulula indlela abazinonga ngayo ezi zithako nala mabali andulo kwezi ncwadi zabo ooJordan noTamsanqa. Kwakhona ndiphinde ndikhangele ukuba ezi zithako zinagalelo lini na kwizigidimi ezingundoqo eziphuhliswa kwezi ncwadi. Isahluko sesihlanu sisishokobezo somsebenzi wezahluko zonke endizenzileyo.
- Full Text:
- Authors: Ganto, Diniwe Joyce
- Date: 2013
- Language: Xhosa
- Type: Thesis , Masters , MA (African Languages)
- Identifier: vital:11150 , http://hdl.handle.net/10353/d1013014
- Description: Olu phando luqwalasela nzulu igalelo loncwadi lwandulo kolwanamhla uncwadi. Kubalulekile ukuba kwenziwe oku kuba ugxudululu lwabahlalutyi boncwadi lwesiXhosa bakholisa ukukhumathela ekukhangeleni ifuthe loncwadi lwaseNtshona kuncwadi lwesiXhosa, babe bona abahlalutyi abagrombonca igalelo loncwadi lwandulo kolwanamhla (kwisiXhosa) benqongophele. Nemingqandandana ekhoyo yophando oselwenziwe kuncwadi lwesiXhosa ikholisa ukukhangela ifuthe, lona uphando olungegalelo loncwadi lwandulo kolwanamhla lunqongophele. Iincwadi endiphengulula zona kulo msebenzi yile kaJordan (Ingqumbo Yeminyanya), nekaTamsanqa (Ithemba Liyaphilisa). Indlela endiwuhlahlube ngayo lo msebenzi wophengululo ingolu hlobo: Isahluko sokuqala yimbulambethe edandalazisa iindlela-ndlela endiza kuchankcatha ngazo ukugrombonca eli galelo loncwadi lwandulo kolwanamhla. Isahluko sesibini siza kugrombonca imigqaliselo ekwakuchancathwa kuyo endulo xa kuyilwa amabalana omthonyama. Ndibuye ndifunxe ulwazi olunzulu ngala mabali andulo. Isahluko sesithathu siza kukhukhuza sikhangele ezi ncwadi zimbini Ingqumbo Yeminyanya ne Ithemba Liyaphilisa ukuba ezi zithako nala mabali andulo asetyenziswe njani na kuzo. Isahluko sesine siza kutwabulula indlela abazinonga ngayo ezi zithako nala mabali andulo kwezi ncwadi zabo ooJordan noTamsanqa. Kwakhona ndiphinde ndikhangele ukuba ezi zithako zinagalelo lini na kwizigidimi ezingundoqo eziphuhliswa kwezi ncwadi. Isahluko sesihlanu sisishokobezo somsebenzi wezahluko zonke endizenzileyo.
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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:
- 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
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Assessment of antibiotic production by some marine Streptomyces isolated from the Nahoon Beach
- Ogunmwonyi, Isoken Nekpen Henrietta
- Authors: Ogunmwonyi, Isoken Nekpen Henrietta
- Date: 2010
- Subjects: Streptomyces , Actinobacteria , Gram-positive bacteria , Antibiotics , Antibiotics -- Testing , Drug resistance in microorganisms
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11243 , http://hdl.handle.net/10353/264 , Streptomyces , Actinobacteria , Gram-positive bacteria , Antibiotics , Antibiotics -- Testing , Drug resistance in microorganisms
- Description: Rapidly emerging strains of bacteria resistant to most advanced antibiotics have become issues of very important public health concern. Research currently directed towards marine actinomycetes presents a vast potential for new compounds that could be able to safely and effectively target resistant species. In this regard, ten putative Streptomyces strains isolated from the Nahoon beach were selected and assessed for antibiotic production and activity against a wide range of bacteria including reference strains, environmental strain and clinical isolates. The ethyl acetate extracts of the putative Streptomyces isolates showed activities against at least 6 and up to 26 of the 32 test bacteria. Inhibition zones were found to range between 9-32 mm diameters at a concentration of 10 mg/ml. The minimum inhibitory concentrations (MICs) of the crude extracts ranged from 0.039 - 10 mg/ml and the least minimum bactericidal concentration (MBC) demonstrated was 0.625 mg/ml against a reference strain Staphylococcus aureus ATCC 6538. Time kill kinetics of all extracts revealed bacteristatic and bactericidal activities. Average Log reductions in viable cell counts for all the extracts ranged from 0.86 Log10 and 3.99 Log10 cfu/ml after 3 h interaction and 0.01 Log10 and 4.86 Log10 after 6 h interaction at MIC, 2 × MIC, 3 × MIC and 4 × MIC concentrations. Most of the extracts were speedily bactericidal at 3 × MIC and 4 × MIC resulting in over 50 % elimination of most of the test bacteria within 3 h and 6 h interaction. The partial characterization of the crude extracts by IR spectral analysis revealed possibility of terpenoid, long chain fatty acids and secondary amine derivatives compounds in the extracts. It is therefore recommended that further investigation should address the relationship between the structure of the active component of the extracts and the broad spectrum activity, as well as a rapid method for large scale production and purification and whether this group of antibiotics has any application in managing human infectious disease.
- Full Text:
- Authors: Ogunmwonyi, Isoken Nekpen Henrietta
- Date: 2010
- Subjects: Streptomyces , Actinobacteria , Gram-positive bacteria , Antibiotics , Antibiotics -- Testing , Drug resistance in microorganisms
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11243 , http://hdl.handle.net/10353/264 , Streptomyces , Actinobacteria , Gram-positive bacteria , Antibiotics , Antibiotics -- Testing , Drug resistance in microorganisms
- Description: Rapidly emerging strains of bacteria resistant to most advanced antibiotics have become issues of very important public health concern. Research currently directed towards marine actinomycetes presents a vast potential for new compounds that could be able to safely and effectively target resistant species. In this regard, ten putative Streptomyces strains isolated from the Nahoon beach were selected and assessed for antibiotic production and activity against a wide range of bacteria including reference strains, environmental strain and clinical isolates. The ethyl acetate extracts of the putative Streptomyces isolates showed activities against at least 6 and up to 26 of the 32 test bacteria. Inhibition zones were found to range between 9-32 mm diameters at a concentration of 10 mg/ml. The minimum inhibitory concentrations (MICs) of the crude extracts ranged from 0.039 - 10 mg/ml and the least minimum bactericidal concentration (MBC) demonstrated was 0.625 mg/ml against a reference strain Staphylococcus aureus ATCC 6538. Time kill kinetics of all extracts revealed bacteristatic and bactericidal activities. Average Log reductions in viable cell counts for all the extracts ranged from 0.86 Log10 and 3.99 Log10 cfu/ml after 3 h interaction and 0.01 Log10 and 4.86 Log10 after 6 h interaction at MIC, 2 × MIC, 3 × MIC and 4 × MIC concentrations. Most of the extracts were speedily bactericidal at 3 × MIC and 4 × MIC resulting in over 50 % elimination of most of the test bacteria within 3 h and 6 h interaction. The partial characterization of the crude extracts by IR spectral analysis revealed possibility of terpenoid, long chain fatty acids and secondary amine derivatives compounds in the extracts. It is therefore recommended that further investigation should address the relationship between the structure of the active component of the extracts and the broad spectrum activity, as well as a rapid method for large scale production and purification and whether this group of antibiotics has any application in managing human infectious disease.
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Uphononongo lwemiba yentlalo inkcubeko noburharha ephembelela ababhali kuthiyo lwabalinganiswa kwiincwadi zedrama zesiXhosa ezichongiweyo
- Authors: Kapa, Nompumelelo
- Date: 2018
- Subjects: Characters and characteristics in literature Xhosa drama
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/8440 , vital:32795
- Description: Olu phando luzakuqwalasela iimeko abathi bazilandele ababhali xa bathiya abalinganiswa phantsi kweemeko zenkcubeko noburharha, kwakunye nokubaluleka kwalo gabalala. Oku kuzakwenziwa kuboniswa nenxaxheba elithi liyidlale ebomini. Kuza kuhlalutywa ezi ncwadi zilandelayo:Amaza ngokubhalwe ngu-Z.S. Qangule, Buzani kuBawo ngu-W.K.Tamsanqa Akwaba ng-T.Ntwana, Iziphumo Zodendo ngu-L.E.Menze, Emgxobhozweni ngu-B.B.Mkonto, Yeha Mfazi Obulala Indoda ngu-L.L.Ngewu, Hay’Ukuzenza ngu-C.F.Jaji. Kwezi ncwadi kuzakuhlalutywa iimeko ezilandelwa ngababhali xa bethiya abalinganiswa kunye nendima edlalwa ligama lo mlinganiswa ngamnye ebalini, oku kuza kubonisa indlela ekuthiywa ngayo ekuhlaleni kwakunye nokubaluleka kwegama kumnini lo. Isahluko sokuqala sizakunika amagqabantshintshi ngolu phando. Esi sahlukosiqulathe oku kulandelayo:Ingabula zigcawu ngophando• Imvelaphi ngentsusa yokuthiywa kwegama• Iinjongo zolu phando• Okunye okufunyenweyo kolu phando• Indlela oluza kuqhutywa ngayo olu phando• Iingxaki zolu phando• Imibuzo yolu phando• Amagqabantshintshi ngezahluko zoluphando Isahluko sesibini siqwalasele ithiyori ezakuthi isetyenziswe kolu phando . Oku kwenziwa ngokuthi kuqwalaselwe ukuba bathini abanye ababhali ngothiyo. Isahluko sesithathu luphononongo lwabalinganiswa kwincwadi nganye kwezichongiweyo, kulandelwa inkcubeko neemeko zasekuhlaleni . Isahluko sesine sijonge ubugcisa boburharha obulandelwe ngababhali xa bathiya abalinganiswa, kwiincwadi ezichongiweyo, kwakunye nendima ethi edlalwe ngabalinganiswa ebalini. Isahluko sesihlanu nesisesokugqibela, siveza ulwazi oluthe lwafumaneka kuthiyo ngqo, luthelekisa nothiyo ezincwadini,sishwankathela iziphumo zophando.
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- Authors: Kapa, Nompumelelo
- Date: 2018
- Subjects: Characters and characteristics in literature Xhosa drama
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/8440 , vital:32795
- Description: Olu phando luzakuqwalasela iimeko abathi bazilandele ababhali xa bathiya abalinganiswa phantsi kweemeko zenkcubeko noburharha, kwakunye nokubaluleka kwalo gabalala. Oku kuzakwenziwa kuboniswa nenxaxheba elithi liyidlale ebomini. Kuza kuhlalutywa ezi ncwadi zilandelayo:Amaza ngokubhalwe ngu-Z.S. Qangule, Buzani kuBawo ngu-W.K.Tamsanqa Akwaba ng-T.Ntwana, Iziphumo Zodendo ngu-L.E.Menze, Emgxobhozweni ngu-B.B.Mkonto, Yeha Mfazi Obulala Indoda ngu-L.L.Ngewu, Hay’Ukuzenza ngu-C.F.Jaji. Kwezi ncwadi kuzakuhlalutywa iimeko ezilandelwa ngababhali xa bethiya abalinganiswa kunye nendima edlalwa ligama lo mlinganiswa ngamnye ebalini, oku kuza kubonisa indlela ekuthiywa ngayo ekuhlaleni kwakunye nokubaluleka kwegama kumnini lo. Isahluko sokuqala sizakunika amagqabantshintshi ngolu phando. Esi sahlukosiqulathe oku kulandelayo:Ingabula zigcawu ngophando• Imvelaphi ngentsusa yokuthiywa kwegama• Iinjongo zolu phando• Okunye okufunyenweyo kolu phando• Indlela oluza kuqhutywa ngayo olu phando• Iingxaki zolu phando• Imibuzo yolu phando• Amagqabantshintshi ngezahluko zoluphando Isahluko sesibini siqwalasele ithiyori ezakuthi isetyenziswe kolu phando . Oku kwenziwa ngokuthi kuqwalaselwe ukuba bathini abanye ababhali ngothiyo. Isahluko sesithathu luphononongo lwabalinganiswa kwincwadi nganye kwezichongiweyo, kulandelwa inkcubeko neemeko zasekuhlaleni . Isahluko sesine sijonge ubugcisa boburharha obulandelwe ngababhali xa bathiya abalinganiswa, kwiincwadi ezichongiweyo, kwakunye nendima ethi edlalwe ngabalinganiswa ebalini. Isahluko sesihlanu nesisesokugqibela, siveza ulwazi oluthe lwafumaneka kuthiyo ngqo, luthelekisa nothiyo ezincwadini,sishwankathela iziphumo zophando.
- Full Text:
Uthelekiso Lwelizwi leMbongi KwisiHobe sikaZolani Mkiva noMzwakhe Mbuli
- Authors: Makhenyane, Lukhanyo
- Date: 2020
- Subjects: African languages , Language and languages , South African poetry
- Language: English
- Type: Thesis , Masters/Doctoral , Degree
- Identifier: http://hdl.handle.net/10353/18020 , vital:42004
- Description: Despite the vast research on African poetry by scholars like Qangule (1979), Ntuli (1984), Sirayi (1985), Bokoda (1994), Mtumane (2000), Bobelo (2008) and Jadezweni (2013), there is a paucity of extended research on the aesthetic works of African poets in South Africa in the post-apartheid era. In a quest to redress this imbalance, I undertook a comparative study of two prominent African poets in the post-apartheid era in South Africa. This study adds nuance to our understanding of African poetry as it would define African poetry further from an African perspective. Swanepoel (1990) challenges scholars of African literature to have a critical look on the developments of neighbouring literatures as comparing these literatures produces new and useful ideas about African literature. In addition, scholars such as Gerard (1981) and Perera (1991) advocate for the creation and adoption of a comparative methodology for the study of African literature. This led scholars such as Mdaka (2002) to test comparative methodology in assessing ideology and aesthetics in South African isiXhosa novels and Kenyan novels written in English. Likewise, Cutalele (2007) uses comparative methodology in investigating similar themes in the aesthetics works of S.E.K. Mqhayi and Zolani Mkiva. In responding to Swanepoel’s challenge, this study aims to investigate and evaluate the importance of the voice of imbongi in articulating current and burning issues in the post-apartheid South Africa as well as the solutions they propose to some of the problems facing the country. In this study, the methodology swings on the hinges of Ngara’s Marxist theory. The choice of Ngara’s Marxist theory is based largely on its theoretical insights on ideology, form and communication in analysing poetry. Ngara divides ideology into three sub-themes: dominant ideology, which refers to the beliefs, set of values, thoughts and actions of a people in a particular era, authorial ideology that refers to the set of values espoused by the poet and aesthetics ideology, which is the literary convention and stylistic of the poet. Using the comparative method, the voice of imbongi in Mbuli and Mkiva’s poetry is compared over three ideologies – protest, patriotism and revolution. Under the theme of protest, I compare Mkiva and Mbuli’s poetry under two sub-themes, socio-political protest and socio-cultural protest. Mbuli and Mkiva’s protest agitates for change in the political and cultural spheres of the post-apartheid South Africa. Page viii of 290 They comment on issues like leadership and social welfare of South Africans, burning issues of this era. In the theme of patriotism, I examined poetry that displays love and loyalty for one’s country. In displaying their love and loyalty for their country, it is clear that to Mbuli and Mkiva, country refers to Africa, not just South Africa. Furthermore, under the theme of revolution I examined poetry that praises struggle heroes as well as the one that introduces the new struggles of the people of South Africa. In praising revolutionary leaders, Mbuli and Mkiva parade good leadership skills for the new breed of leaders to learn. In discussing the revolutionary theme, they speak of economic freedom as one of the struggles of the new South Africa. In investigating and evaluating their poetry in post-aparthied South Africa, I discovered that in their protest and their revolutionary ideology they express the theme of disillusionment. They speak against corruption in leadership while they question those who violate children and women’s right to life. Such issues were thought to be buried with the death of apartheid. Furthermore, they introduce us to neo-revolution by showing how the struggle for freedom still continues as freedom without economic freedom falls short of freedom.
- Full Text:
- Authors: Makhenyane, Lukhanyo
- Date: 2020
- Subjects: African languages , Language and languages , South African poetry
- Language: English
- Type: Thesis , Masters/Doctoral , Degree
- Identifier: http://hdl.handle.net/10353/18020 , vital:42004
- Description: Despite the vast research on African poetry by scholars like Qangule (1979), Ntuli (1984), Sirayi (1985), Bokoda (1994), Mtumane (2000), Bobelo (2008) and Jadezweni (2013), there is a paucity of extended research on the aesthetic works of African poets in South Africa in the post-apartheid era. In a quest to redress this imbalance, I undertook a comparative study of two prominent African poets in the post-apartheid era in South Africa. This study adds nuance to our understanding of African poetry as it would define African poetry further from an African perspective. Swanepoel (1990) challenges scholars of African literature to have a critical look on the developments of neighbouring literatures as comparing these literatures produces new and useful ideas about African literature. In addition, scholars such as Gerard (1981) and Perera (1991) advocate for the creation and adoption of a comparative methodology for the study of African literature. This led scholars such as Mdaka (2002) to test comparative methodology in assessing ideology and aesthetics in South African isiXhosa novels and Kenyan novels written in English. Likewise, Cutalele (2007) uses comparative methodology in investigating similar themes in the aesthetics works of S.E.K. Mqhayi and Zolani Mkiva. In responding to Swanepoel’s challenge, this study aims to investigate and evaluate the importance of the voice of imbongi in articulating current and burning issues in the post-apartheid South Africa as well as the solutions they propose to some of the problems facing the country. In this study, the methodology swings on the hinges of Ngara’s Marxist theory. The choice of Ngara’s Marxist theory is based largely on its theoretical insights on ideology, form and communication in analysing poetry. Ngara divides ideology into three sub-themes: dominant ideology, which refers to the beliefs, set of values, thoughts and actions of a people in a particular era, authorial ideology that refers to the set of values espoused by the poet and aesthetics ideology, which is the literary convention and stylistic of the poet. Using the comparative method, the voice of imbongi in Mbuli and Mkiva’s poetry is compared over three ideologies – protest, patriotism and revolution. Under the theme of protest, I compare Mkiva and Mbuli’s poetry under two sub-themes, socio-political protest and socio-cultural protest. Mbuli and Mkiva’s protest agitates for change in the political and cultural spheres of the post-apartheid South Africa. Page viii of 290 They comment on issues like leadership and social welfare of South Africans, burning issues of this era. In the theme of patriotism, I examined poetry that displays love and loyalty for one’s country. In displaying their love and loyalty for their country, it is clear that to Mbuli and Mkiva, country refers to Africa, not just South Africa. Furthermore, under the theme of revolution I examined poetry that praises struggle heroes as well as the one that introduces the new struggles of the people of South Africa. In praising revolutionary leaders, Mbuli and Mkiva parade good leadership skills for the new breed of leaders to learn. In discussing the revolutionary theme, they speak of economic freedom as one of the struggles of the new South Africa. In investigating and evaluating their poetry in post-aparthied South Africa, I discovered that in their protest and their revolutionary ideology they express the theme of disillusionment. They speak against corruption in leadership while they question those who violate children and women’s right to life. Such issues were thought to be buried with the death of apartheid. Furthermore, they introduce us to neo-revolution by showing how the struggle for freedom still continues as freedom without economic freedom falls short of freedom.
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Distribution of culturable vibrio species in freshwater resources of Cacadu, or Tambo and Chris Hani district municipalities
- Authors: Gaqavu, Sisipho
- Date: 2017
- Subjects: Vibrio--South Africa--Eastern Cape Vibrio infections--South Africa--Eastern Cape Foodborne diseases--South Africa--Eastern Cape
- Language: English
- Type: Thesis , Masters , Microbiology
- Identifier: http://hdl.handle.net/10353/11571 , vital:39085
- Description: Freshwater resources are essential to the survival of all living organisms and are used for numerous purposes such as domestic, industrial, agricultural and recreational activities. Nevertheless they are vulnerable to contamination including by pathogenic organisms. Among the pathogens distributed in water resources, diarrhoea causing pathogens such as Vibrio species are the most frequently encountered, hence, the aim of this study was to evaluate the incidence of pathogenic Vibrio species in freshwater resources in Cacadu, OR Tambo and Chris Hani District Municipalities. Water samples were collected from four rivers located in Cacadu, OR Tambo and Chris Hani District Municipalities in the Eastern Cape Province, South Africa. A total of 6 physicochemical parameterswere measured and includes: temperature, total dissolved solids (TDS), dissolved oxygen, turbidity, pH and electrical conductivity. Samples were collected between March and May 2016and concentrated using the standard membrane filtration technique and plated on TCBS agar. Yellow and green colonies on TCBS agar were enumerated as presumptive Vibrio species and expressed as CFU/100ml for each river. The identification of the presumptive Vibrio species and their antibiogram characteristics were done using both culture based and molecular techniques. The physicochemical qualities ranged as follows: pH (7.0-7.03), temperature (16 - 23 ºC), turbidity (15.6 – 43 NTU), electrical conductivity (61.1 – 835μS/cm), dissolved oxygen (7.34 – 8.73 mg/L), total dissolved solids (39.3 – 533.33 mg/L). Statistical analysis showed that pH, temperature, turbidity, dissolved oxygen were significantly different (P < 0.05), whereas the total dissolved solids were not significantly different (P ˃ 0.05) with respect to sampling sites. Vibrio densities ranged between 3.08 ×101-6.96 ×101 with Bloukrans River characterized by high counts compared to other rivers. Two hundred and three (203) positive Vibrio genus isolates were screened for speciation. Of these, the prevalent species found was V. cholerae (29percent) followed by V. vulnificus (4percent), V. fluvialis (4percent) and the least was V. parahaemolyticus (3percent). The remaining unidentified 60percent were alleged to belong to other Vibrio species not covered within the scope of this study. The antibiotic susceptibility profiles of confirmed Vibrio genus isolates recovered from the four rivers revealed that 83percent of Vibrio isolates in this study exhibited resistance againstthree or more antimicrobial agents. The presence of the following Vibrio pathogens V. fluvialis, V. cholerae, V. vulnificus and V. parahaemolyticus in water resources suggests that these water resources are significant reservoirs of Vibrio pathogens. Thus, there is a need for regular contamination monitoring programme of the selected water resources and other areas that might be of interest. In general, the results obtained from this study suggest that the river waters are not suitable for drinking, domestic or recreational use.
- Full Text:
- Authors: Gaqavu, Sisipho
- Date: 2017
- Subjects: Vibrio--South Africa--Eastern Cape Vibrio infections--South Africa--Eastern Cape Foodborne diseases--South Africa--Eastern Cape
- Language: English
- Type: Thesis , Masters , Microbiology
- Identifier: http://hdl.handle.net/10353/11571 , vital:39085
- Description: Freshwater resources are essential to the survival of all living organisms and are used for numerous purposes such as domestic, industrial, agricultural and recreational activities. Nevertheless they are vulnerable to contamination including by pathogenic organisms. Among the pathogens distributed in water resources, diarrhoea causing pathogens such as Vibrio species are the most frequently encountered, hence, the aim of this study was to evaluate the incidence of pathogenic Vibrio species in freshwater resources in Cacadu, OR Tambo and Chris Hani District Municipalities. Water samples were collected from four rivers located in Cacadu, OR Tambo and Chris Hani District Municipalities in the Eastern Cape Province, South Africa. A total of 6 physicochemical parameterswere measured and includes: temperature, total dissolved solids (TDS), dissolved oxygen, turbidity, pH and electrical conductivity. Samples were collected between March and May 2016and concentrated using the standard membrane filtration technique and plated on TCBS agar. Yellow and green colonies on TCBS agar were enumerated as presumptive Vibrio species and expressed as CFU/100ml for each river. The identification of the presumptive Vibrio species and their antibiogram characteristics were done using both culture based and molecular techniques. The physicochemical qualities ranged as follows: pH (7.0-7.03), temperature (16 - 23 ºC), turbidity (15.6 – 43 NTU), electrical conductivity (61.1 – 835μS/cm), dissolved oxygen (7.34 – 8.73 mg/L), total dissolved solids (39.3 – 533.33 mg/L). Statistical analysis showed that pH, temperature, turbidity, dissolved oxygen were significantly different (P < 0.05), whereas the total dissolved solids were not significantly different (P ˃ 0.05) with respect to sampling sites. Vibrio densities ranged between 3.08 ×101-6.96 ×101 with Bloukrans River characterized by high counts compared to other rivers. Two hundred and three (203) positive Vibrio genus isolates were screened for speciation. Of these, the prevalent species found was V. cholerae (29percent) followed by V. vulnificus (4percent), V. fluvialis (4percent) and the least was V. parahaemolyticus (3percent). The remaining unidentified 60percent were alleged to belong to other Vibrio species not covered within the scope of this study. The antibiotic susceptibility profiles of confirmed Vibrio genus isolates recovered from the four rivers revealed that 83percent of Vibrio isolates in this study exhibited resistance againstthree or more antimicrobial agents. The presence of the following Vibrio pathogens V. fluvialis, V. cholerae, V. vulnificus and V. parahaemolyticus in water resources suggests that these water resources are significant reservoirs of Vibrio pathogens. Thus, there is a need for regular contamination monitoring programme of the selected water resources and other areas that might be of interest. In general, the results obtained from this study suggest that the river waters are not suitable for drinking, domestic or recreational use.
- Full Text:
Synthesis, characterisation and evaluation of functionalized Lignocelluloses-clay nanocomposites for organic pollutant removal from water
- Authors: Mafukidze, Donovan M
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Chemistry)
- Identifier: vital:11356 , http://hdl.handle.net/10353/d1021296
- Description: PMPSgLig-NaMMT nanocomposites were prepared from methacryloxypropyltrimethoxysilane (MPS), lignocellulose and montmorillonite clay. The potential enhancement of organic pollutant adsorption capabilities of PMPSgLig-NaMMT nanocomposite from water through functionalization was investigated. PMPSgLig-NaMMT was functionalized by esterification and etherification using different methods so as to increase the surface hydrophobicity of the material and hence improve its compatibility with the target pollutants. Specific chemical routes specially tailored for PMPSgLig-NaMMT were established for functionalization mostly based on the common esterification (Fischer esterification) and etherification (Williamson‟s etherification) reactions. In the functionalization methods, factors such as pH environment, nanocomposite composition, nature of functionalization moiety, and use of or absence of solvents and their variations were studied. FT-IR, XRD, SEM and TGA were used to characterize the synthesized and functionalized nanoadsorbents. The techniques showed successful functionalization via esterification and etherification methods albeit to different extents, with clear retention of the material‟s original structure though there were signs of degradation with some methods. Characterization was supported by adsorption studies to validate implications and draw conclusions. The use of 1,10-phenathroline as a model organic pollutant in water in the adsorption studies showed that adsorbents conformed to monolayer adsorption following pseudo-second order kinetics for adsorption of organic pollutants accurately represented. Most importantly the studies revealed the significant impact of the nanocomposite composition on the overall absorbent performance. Adsorption studies also showed that functionalization via esterification methods gave rise to better adsorbents.
- Full Text:
- Authors: Mafukidze, Donovan M
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Chemistry)
- Identifier: vital:11356 , http://hdl.handle.net/10353/d1021296
- Description: PMPSgLig-NaMMT nanocomposites were prepared from methacryloxypropyltrimethoxysilane (MPS), lignocellulose and montmorillonite clay. The potential enhancement of organic pollutant adsorption capabilities of PMPSgLig-NaMMT nanocomposite from water through functionalization was investigated. PMPSgLig-NaMMT was functionalized by esterification and etherification using different methods so as to increase the surface hydrophobicity of the material and hence improve its compatibility with the target pollutants. Specific chemical routes specially tailored for PMPSgLig-NaMMT were established for functionalization mostly based on the common esterification (Fischer esterification) and etherification (Williamson‟s etherification) reactions. In the functionalization methods, factors such as pH environment, nanocomposite composition, nature of functionalization moiety, and use of or absence of solvents and their variations were studied. FT-IR, XRD, SEM and TGA were used to characterize the synthesized and functionalized nanoadsorbents. The techniques showed successful functionalization via esterification and etherification methods albeit to different extents, with clear retention of the material‟s original structure though there were signs of degradation with some methods. Characterization was supported by adsorption studies to validate implications and draw conclusions. The use of 1,10-phenathroline as a model organic pollutant in water in the adsorption studies showed that adsorbents conformed to monolayer adsorption following pseudo-second order kinetics for adsorption of organic pollutants accurately represented. Most importantly the studies revealed the significant impact of the nanocomposite composition on the overall absorbent performance. Adsorption studies also showed that functionalization via esterification methods gave rise to better adsorbents.
- Full Text:
Preparation and evaluation of Lignocellulose-Montmorillonite nanocomposites for the adsorption of some heavy metals and organic dyes from aqueous solution
- Authors: Bunhu, Tavengwa
- Date: 2011
- Subjects: Lignocellulose , Lignocellulose -- Biodegradation , Water -- Purification , Adsorption , Separation (Technology) , Dyes and dyeing , Montmorillonite
- Language: English
- Type: Thesis , Doctoral , PhD (Chemistry)
- Identifier: vital:11333 , http://hdl.handle.net/10353/535 , Lignocellulose , Lignocellulose -- Biodegradation , Water -- Purification , Adsorption , Separation (Technology) , Dyes and dyeing , Montmorillonite
- Description: The need to reduce the cost of adsorption technology has led scientists to explore the use of many low cost adsorbents especially those from renewable resources. Lignocellulose and montmorillonite clay have been identified as potentially low cost and efficient adsorbent materials for the removal of toxic heavy metals and organic substances from contaminated water. Montmorillonite clay has good adsorption properties and the potential for ion exchange. Lignocellulose possesses many hydroxyl, carbonyl and phenyl groups and therefore, both montmorillonite and lignocellulose are good candidates for the development of effective and low cost adsorbents in water treatment and purification. The aim of this study was to prepare composite materials based on lignocellulose and montmorillonite clay and subsequently evaluate their efficacy as adsorbents for heavy metal species and organic pollutants in aqueous solution. It was also important to assess the adsorption properties of the modified individual (uncombined) lignocellulose and montmorillonite. Lignocellulose and sodium-exchanged montmorillonite (NaMMT) clay were each separately modified with methyl methacrylate (MMA), methacrylic acid (MAA) and methacryloxypropyl trimethoxysilane (MPS) and used as adsorbents for the removal of heavy metals and dyes from aqueous solution. The lignocellulose and NaMMT were modified with MMA, MAA and MPS through free radical graft polymerisation and/or condensation reactions. NaMMT was also modified through Al-pillaring to give AlpMMT. The materials were characterised by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and small angle X-ray scattering (SAXS) and characterisation results showed that the modification of the montmorillonite with MAA, MMA and MPS was successful. The modified lignocellulose and montmorillonite materials were evaluated for the adsorption of heavy metal ions (Cd2+ and Pb2+) from aqueous solution by the batch method. The adsorption isotherms and kinetics of both Cd2+ and Pb2+ onto the NaMMT clay, AlpMMT and lignocellulose materials are presented. The Langmuir isotherm was found to be the best fit for the adsorption of both heavy metals onto all the adsorbents. AlpMMT showed very poor uptake for heavy metals (both Cd2+ and Pb2+). PMMAgMMT, PMAAgMMT, PMAAgLig and PMPSgLig showed improved adsorption for both heavy metals. The mechanism of heavy metal adsorption onto the adsorbents was best represented by the pseudo second-order kinetic model. PMPSgLig, NaMMT and AlpMMT showed relatively high adsorption capacities for methyl orange, while the adsorption of neutral red was comparable for almost all the adsorbents. Neither the Langmuir model nor the Freundlich model was found to v adequately describe the adsorption process of dyes onto all the adsorbents. The pseudo second-order model was found to be the best fit to describe the adsorption mechanism of both dyes onto all the adsorbents. The modification of lignocellulose and montmorillonite with suitable organic groups can potentially produce highly effective and efficient adsorbents for the removal of both heavy metals and dyes from contaminated water. Novel adsorbent composite materials based on lignocellulose and montmorillonite clay (NaMMT) were also prepared and evaluated for the removal of pollutants (dyes and heavy metals) from aqueous solution. The lignocellulose-montmorillonite composites were prepared by in situ intercalative polymerisation, using methyl methacrylate, methacrylic acid and methacryloxypropyl trimethoxysilane (MPS) as coupling agents. The composite materials were characterised by FTIR, TGA, TEM and SAXS. SAXS diffractograms showed intercalated nanocomposites of PMMAgLig-NaMMT and PMAAgLig-NaMMT, whereas PMPSgLig-NaMMT showed a phase-separated composite and the same results were confirmed by TEM. The lignocellulose-montmorillonite composites were assessed for their adsorption properties for heavy metal ions (Cd2+ and Pb2+) and dyes (methyl orange and neutral red) from aqueous solution. Among these composite materials, only PMAAgLig-NaMMT showed a marked increase in the uptake of both Cd2+ and Pb2+ relative to lignocellulose and montmorillonite when used independently. The adsorption data were fitted to the Langmuir and Freundlich isotherms, as well as to the pseudo first-order and pseudo second-order kinetic models. The data were best described by the Langmuir isotherm and the pseudo second-order kinetic model. On the adsorption of dyes, only PMPSgLig-NaMMT showed enhanced adsorption of methyl orange (MetO) compared with lignocellulose and montmorillonite separately. The enhanced adsorption was attributed to the synergistic adsorption due to the presence of MPS, lignocellulose and NaMMT. Competitive adsorption studies were carried out from binary mixtures of MetO and Cd2+ or Pb2+ in aqueous solution. The adsorption process of MetO onto the composite material was found to follow the Freundlich adsorption model, while the mechanism of adsorption followed both the pseudo first-order and pseudo second-order models. This particular composite can be used for the simultaneous adsorption of both heavy metals and organic dyes from contaminated water. The adsorption of neutral red to the composite materials was comparable and the pseudo second-order kinetic model best described the adsorption mechanism.
- Full Text:
- Authors: Bunhu, Tavengwa
- Date: 2011
- Subjects: Lignocellulose , Lignocellulose -- Biodegradation , Water -- Purification , Adsorption , Separation (Technology) , Dyes and dyeing , Montmorillonite
- Language: English
- Type: Thesis , Doctoral , PhD (Chemistry)
- Identifier: vital:11333 , http://hdl.handle.net/10353/535 , Lignocellulose , Lignocellulose -- Biodegradation , Water -- Purification , Adsorption , Separation (Technology) , Dyes and dyeing , Montmorillonite
- Description: The need to reduce the cost of adsorption technology has led scientists to explore the use of many low cost adsorbents especially those from renewable resources. Lignocellulose and montmorillonite clay have been identified as potentially low cost and efficient adsorbent materials for the removal of toxic heavy metals and organic substances from contaminated water. Montmorillonite clay has good adsorption properties and the potential for ion exchange. Lignocellulose possesses many hydroxyl, carbonyl and phenyl groups and therefore, both montmorillonite and lignocellulose are good candidates for the development of effective and low cost adsorbents in water treatment and purification. The aim of this study was to prepare composite materials based on lignocellulose and montmorillonite clay and subsequently evaluate their efficacy as adsorbents for heavy metal species and organic pollutants in aqueous solution. It was also important to assess the adsorption properties of the modified individual (uncombined) lignocellulose and montmorillonite. Lignocellulose and sodium-exchanged montmorillonite (NaMMT) clay were each separately modified with methyl methacrylate (MMA), methacrylic acid (MAA) and methacryloxypropyl trimethoxysilane (MPS) and used as adsorbents for the removal of heavy metals and dyes from aqueous solution. The lignocellulose and NaMMT were modified with MMA, MAA and MPS through free radical graft polymerisation and/or condensation reactions. NaMMT was also modified through Al-pillaring to give AlpMMT. The materials were characterised by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and small angle X-ray scattering (SAXS) and characterisation results showed that the modification of the montmorillonite with MAA, MMA and MPS was successful. The modified lignocellulose and montmorillonite materials were evaluated for the adsorption of heavy metal ions (Cd2+ and Pb2+) from aqueous solution by the batch method. The adsorption isotherms and kinetics of both Cd2+ and Pb2+ onto the NaMMT clay, AlpMMT and lignocellulose materials are presented. The Langmuir isotherm was found to be the best fit for the adsorption of both heavy metals onto all the adsorbents. AlpMMT showed very poor uptake for heavy metals (both Cd2+ and Pb2+). PMMAgMMT, PMAAgMMT, PMAAgLig and PMPSgLig showed improved adsorption for both heavy metals. The mechanism of heavy metal adsorption onto the adsorbents was best represented by the pseudo second-order kinetic model. PMPSgLig, NaMMT and AlpMMT showed relatively high adsorption capacities for methyl orange, while the adsorption of neutral red was comparable for almost all the adsorbents. Neither the Langmuir model nor the Freundlich model was found to v adequately describe the adsorption process of dyes onto all the adsorbents. The pseudo second-order model was found to be the best fit to describe the adsorption mechanism of both dyes onto all the adsorbents. The modification of lignocellulose and montmorillonite with suitable organic groups can potentially produce highly effective and efficient adsorbents for the removal of both heavy metals and dyes from contaminated water. Novel adsorbent composite materials based on lignocellulose and montmorillonite clay (NaMMT) were also prepared and evaluated for the removal of pollutants (dyes and heavy metals) from aqueous solution. The lignocellulose-montmorillonite composites were prepared by in situ intercalative polymerisation, using methyl methacrylate, methacrylic acid and methacryloxypropyl trimethoxysilane (MPS) as coupling agents. The composite materials were characterised by FTIR, TGA, TEM and SAXS. SAXS diffractograms showed intercalated nanocomposites of PMMAgLig-NaMMT and PMAAgLig-NaMMT, whereas PMPSgLig-NaMMT showed a phase-separated composite and the same results were confirmed by TEM. The lignocellulose-montmorillonite composites were assessed for their adsorption properties for heavy metal ions (Cd2+ and Pb2+) and dyes (methyl orange and neutral red) from aqueous solution. Among these composite materials, only PMAAgLig-NaMMT showed a marked increase in the uptake of both Cd2+ and Pb2+ relative to lignocellulose and montmorillonite when used independently. The adsorption data were fitted to the Langmuir and Freundlich isotherms, as well as to the pseudo first-order and pseudo second-order kinetic models. The data were best described by the Langmuir isotherm and the pseudo second-order kinetic model. On the adsorption of dyes, only PMPSgLig-NaMMT showed enhanced adsorption of methyl orange (MetO) compared with lignocellulose and montmorillonite separately. The enhanced adsorption was attributed to the synergistic adsorption due to the presence of MPS, lignocellulose and NaMMT. Competitive adsorption studies were carried out from binary mixtures of MetO and Cd2+ or Pb2+ in aqueous solution. The adsorption process of MetO onto the composite material was found to follow the Freundlich adsorption model, while the mechanism of adsorption followed both the pseudo first-order and pseudo second-order models. This particular composite can be used for the simultaneous adsorption of both heavy metals and organic dyes from contaminated water. The adsorption of neutral red to the composite materials was comparable and the pseudo second-order kinetic model best described the adsorption mechanism.
- Full Text:
Emergent literacy skills in isiXhosa in selected Early Childhood Development Centres in the Mthatha District
- Authors: Mpondwana, Gloria Nonzukiso
- Date: 2022-06
- Subjects: Literacy , Child development , Language arts (Early childhood)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27864 , vital:70233
- Description: The study sought to establish how ECD practitioners understood emergent literacy skills in young children, examine how practitioners engage young learners in promoting emergent literacy skills in isiXhosa, document and analyse materials practitioners use to promote emergent literacy skills in young learners, and examine challenges practitioners come across in promoting emergent literacy skills. The study used the interpretivist research paradigm, which seeks a holistic understanding of an issue under investigation. A qualitative research approach was followed, and a case study design was utilised. Six purposefully selected ECD centres in the Mthatha urban district of the Eastern Cape province were studied. Six ECD practitioners, one from each of the selected centres, participated in the study. An in-depth individual interview was carried out with each of the ECD practitioners. Follow-up interviews were made to clarify issues that emanated from the initial interviews. The study found that the practitioners had different ways of how they understood the concept of emergent literacy. The practitioners emphasised the development of four language skills namely reading, writing, speaking, and listening in their understanding of emergent literacy. The study further found that the practitioners also included in their understanding of emergent literacy skills, the importance of dealing with sounds in the isiXhosa language. The study revealed several ways in which the practitioners engaged young learners in promoting emergent literacy skills in IsiXhosa. The storytelling approach was utilised by the practitioners as they used IsiXhosa stories and folktales in class. Picture books and posters were used by the practitioners to assist in developing emergent literacy skills. It was also found that the practitioners engaged the young children using songs and games in developing emergent literacy skills. Drama and role-play were also used to engage the children in promoting emergent literacy skills. The practitioners also made use of different materials to engage the children in the promotion of early literacy skills. They used storybooks, colouring and painting, as well as cartoons. There were many challenges that the practitioners encountered in the promotion of emergent literacy skills in young children, and these ranged from the use of ineffective teaching and learning approaches to the lack of professional development support for the practitioners. The study concludes that the understanding of emergent literacy as a concept varied from ECD practitioner to practitioner. While other practitioners appeared to have a broad and clear understanding of the concept others had a limited one. The promotion of emergent literacy skills varied but there were attempts to utilise different approaches and materials. There were also numerous challenges associated with the promotion of emergent literacy skills in isiXhosa. The study recommends the inclusion of emergent skills development in ECD practitioners' training and professional development programmes. Support programmes should be put in place to assist the ECD practitioners. More appropriate materials should be developed in the isiXhosa language for use in promoting emergent literacy skills. , Thesis (MEd) -- Faculty of Education, 2022
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- Authors: Mpondwana, Gloria Nonzukiso
- Date: 2022-06
- Subjects: Literacy , Child development , Language arts (Early childhood)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27864 , vital:70233
- Description: The study sought to establish how ECD practitioners understood emergent literacy skills in young children, examine how practitioners engage young learners in promoting emergent literacy skills in isiXhosa, document and analyse materials practitioners use to promote emergent literacy skills in young learners, and examine challenges practitioners come across in promoting emergent literacy skills. The study used the interpretivist research paradigm, which seeks a holistic understanding of an issue under investigation. A qualitative research approach was followed, and a case study design was utilised. Six purposefully selected ECD centres in the Mthatha urban district of the Eastern Cape province were studied. Six ECD practitioners, one from each of the selected centres, participated in the study. An in-depth individual interview was carried out with each of the ECD practitioners. Follow-up interviews were made to clarify issues that emanated from the initial interviews. The study found that the practitioners had different ways of how they understood the concept of emergent literacy. The practitioners emphasised the development of four language skills namely reading, writing, speaking, and listening in their understanding of emergent literacy. The study further found that the practitioners also included in their understanding of emergent literacy skills, the importance of dealing with sounds in the isiXhosa language. The study revealed several ways in which the practitioners engaged young learners in promoting emergent literacy skills in IsiXhosa. The storytelling approach was utilised by the practitioners as they used IsiXhosa stories and folktales in class. Picture books and posters were used by the practitioners to assist in developing emergent literacy skills. It was also found that the practitioners engaged the young children using songs and games in developing emergent literacy skills. Drama and role-play were also used to engage the children in promoting emergent literacy skills. The practitioners also made use of different materials to engage the children in the promotion of early literacy skills. They used storybooks, colouring and painting, as well as cartoons. There were many challenges that the practitioners encountered in the promotion of emergent literacy skills in young children, and these ranged from the use of ineffective teaching and learning approaches to the lack of professional development support for the practitioners. The study concludes that the understanding of emergent literacy as a concept varied from ECD practitioner to practitioner. While other practitioners appeared to have a broad and clear understanding of the concept others had a limited one. The promotion of emergent literacy skills varied but there were attempts to utilise different approaches and materials. There were also numerous challenges associated with the promotion of emergent literacy skills in isiXhosa. The study recommends the inclusion of emergent skills development in ECD practitioners' training and professional development programmes. Support programmes should be put in place to assist the ECD practitioners. More appropriate materials should be developed in the isiXhosa language for use in promoting emergent literacy skills. , Thesis (MEd) -- Faculty of Education, 2022
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Enhancing phosphorus availability in some phosphate fixing soils of the Transkei region, South Africa using goat manure
- Authors: Gichangi, Elias Maina
- Date: 2007
- Subjects: Phosphorus in agriculture , Soils -- Phosphorus content , Phosphatic fertilizers , Soils -- Phosphorus content -- South Africa -- Transkei
- Language: English
- Type: Thesis , Doctoral , PhD (Soil Science)
- Identifier: vital:11960 , http://hdl.handle.net/10353/80 , Phosphorus in agriculture , Soils -- Phosphorus content , Phosphatic fertilizers , Soils -- Phosphorus content -- South Africa -- Transkei
- Description: Low availability of soil phosphorus (P) caused by strong sorption of P is a major constraint to agricultural production in most South African soils, particularly those from the high rainfall areas. The aim of this study was therefore to investigate whether combined addition of goat manure with inorganic P fertilizers could enhance P availability in some P fixing soils of the Transkei region, South Africa. The study addressed the following specific objectives (i) to assess P sorption capacities and requirements of selected soils and their relationship with selected soil properties and single point sorption test, (ii) to assess the effects of goat manure and lime addition on P sorption properties of selected P fixing soils (iii) to assess the temporal changes in concentration of inorganic and microbial biomass P fractions following application of inorganic fertilizer P with goat manure in a laboratory incubation experiment, and, (iv) to assess the effects of goat manure application with inorganic phosphate on inorganic and microbial biomass P fractions, P uptake and dry matter yield of maize. Sorption maxima (Smax) of seven soils examined ranged from 192.3 to 909.1 (mg P kg-1) and were highly and positively correlated with sorption affinity constant (r = 0.93, p = 0.01) and organic C (r = 0.71, p = 0.01). The amount of P required for maintaining a soil solution concentration of 0.2 mg P l-1 ranged from 2.1 to 123.5 mg P kg-1 soil. Soils collected from Qweqwe (a Cambisol), Qunu (an Acrisol), Ncihane (a Luvisol) and Bethania (a Ferralsol) had lower external P requirement values and were classified as lower sorbers, whereas soils from Ntlonyana (a Planosol), Chevy Chase (a Ferralsol) and Flagstaff (a Ferralsol) were classified as moderate sorbers. The results suggested that P availability could be compromised in 43 percent iii of the soils studied and that measures to mitigate the adverse effects of P sorption were needed to ensure that P is not a limiting factor to crop production, where such soils are found. Goat manure addition at varying rates (5, 10 and 20 tha-1 dry weight basis) to two of the moderately P fixing soils from Chevy Chase and Flagstaff, reduced P sorption maxima (Smax) compared to the control treatment. Phosphate sorption decreased with increasing amounts of goat manure in both soils but the extent of reduction was greater on Chevy Chase soil than on Flagstaff soil. The relative liming effects of the different rates of goat manure followed the order 20 t GM ha-1 > 10 t GM ha-1 > 5 t GM ha-1. In a separate experiment, addition of inorganic P at varying rates (0, 90, 180, and 360 kg P ha-1) to Flagstaff soil increased labile P fractions (resin P, biomass P and NaHCO3-Pi) and the increases were greater when goat manure was co-applied. The control treatments contained only 17.2 and 27.5 mg P kg-1 of resin extractable P in the un-amended and manure amended treatments, respectively which increased to 118.2 and 122.7 mg P kg-1 on day 28 of incubation. Biomass P concentration was increased from 16.8 to 43.9 mg P kg-1 in P alone treatments but the fraction was greatly enhanced with manure addition, increasing it from 32.6 to 97.7 mg P kg-1. NaOH-Pi was the largest extractable Pi fraction and ranged from 144.3 to 250.6 mg P kg-1 and 107.5 to 213.2 mg P kg-1 in the unamended and manure amended treatments, respectively. Dry matter yield and P uptake by maize grown in the glasshouse were highly and significantly (p = 0.05) correlated with the different P fractions in the soil. The correlations followed the order resin P (r = 0.85) > NaOH-Pi (r = 0.85) > NaHCO3-Pi (r = 0.84) >> biomass P (r = 0.56) for dry matter yield at 6 weeks after planting. At 12 weeks after planting, goat manure had iv highly significant effects on resin P and biomass P but had no effect on NaHCO3-Pi and NaOH–Pi. The combination of biomass P, resin P and NaHCO3-Pi explained 75.8 percent of the variation in dry matter yield of which 63.0 percent of the variation was explained by biomass P alone. The greatest increase in biomass P occurred when added P was co-applied with 5 or 10 tha-1 goat manure. The predictive equation for maize dry matter yield (DM) was: DM (g) = 1.897 biomass P + 0.645 resin P (r = 0.73). Resin P was the fraction that was most depleted due to plant uptake and decreased by 56 to 68 percent between the 6th week and the 12th week of sampling indicating that it played a greater role in supplying plant available P. The results therefore suggested that the use of goat manure may allow resource poor farmers to use lower levels of commercial phosphate fertilizers because of its effect to reduce soil P sorption. In addition, higher increases in biomass P due to manure addition observed at lower rates of added P indicated that goat manure has potential for enhancing bioavailability and fertilizer use efficiency of small inorganic P applications.
- Full Text:
- Authors: Gichangi, Elias Maina
- Date: 2007
- Subjects: Phosphorus in agriculture , Soils -- Phosphorus content , Phosphatic fertilizers , Soils -- Phosphorus content -- South Africa -- Transkei
- Language: English
- Type: Thesis , Doctoral , PhD (Soil Science)
- Identifier: vital:11960 , http://hdl.handle.net/10353/80 , Phosphorus in agriculture , Soils -- Phosphorus content , Phosphatic fertilizers , Soils -- Phosphorus content -- South Africa -- Transkei
- Description: Low availability of soil phosphorus (P) caused by strong sorption of P is a major constraint to agricultural production in most South African soils, particularly those from the high rainfall areas. The aim of this study was therefore to investigate whether combined addition of goat manure with inorganic P fertilizers could enhance P availability in some P fixing soils of the Transkei region, South Africa. The study addressed the following specific objectives (i) to assess P sorption capacities and requirements of selected soils and their relationship with selected soil properties and single point sorption test, (ii) to assess the effects of goat manure and lime addition on P sorption properties of selected P fixing soils (iii) to assess the temporal changes in concentration of inorganic and microbial biomass P fractions following application of inorganic fertilizer P with goat manure in a laboratory incubation experiment, and, (iv) to assess the effects of goat manure application with inorganic phosphate on inorganic and microbial biomass P fractions, P uptake and dry matter yield of maize. Sorption maxima (Smax) of seven soils examined ranged from 192.3 to 909.1 (mg P kg-1) and were highly and positively correlated with sorption affinity constant (r = 0.93, p = 0.01) and organic C (r = 0.71, p = 0.01). The amount of P required for maintaining a soil solution concentration of 0.2 mg P l-1 ranged from 2.1 to 123.5 mg P kg-1 soil. Soils collected from Qweqwe (a Cambisol), Qunu (an Acrisol), Ncihane (a Luvisol) and Bethania (a Ferralsol) had lower external P requirement values and were classified as lower sorbers, whereas soils from Ntlonyana (a Planosol), Chevy Chase (a Ferralsol) and Flagstaff (a Ferralsol) were classified as moderate sorbers. The results suggested that P availability could be compromised in 43 percent iii of the soils studied and that measures to mitigate the adverse effects of P sorption were needed to ensure that P is not a limiting factor to crop production, where such soils are found. Goat manure addition at varying rates (5, 10 and 20 tha-1 dry weight basis) to two of the moderately P fixing soils from Chevy Chase and Flagstaff, reduced P sorption maxima (Smax) compared to the control treatment. Phosphate sorption decreased with increasing amounts of goat manure in both soils but the extent of reduction was greater on Chevy Chase soil than on Flagstaff soil. The relative liming effects of the different rates of goat manure followed the order 20 t GM ha-1 > 10 t GM ha-1 > 5 t GM ha-1. In a separate experiment, addition of inorganic P at varying rates (0, 90, 180, and 360 kg P ha-1) to Flagstaff soil increased labile P fractions (resin P, biomass P and NaHCO3-Pi) and the increases were greater when goat manure was co-applied. The control treatments contained only 17.2 and 27.5 mg P kg-1 of resin extractable P in the un-amended and manure amended treatments, respectively which increased to 118.2 and 122.7 mg P kg-1 on day 28 of incubation. Biomass P concentration was increased from 16.8 to 43.9 mg P kg-1 in P alone treatments but the fraction was greatly enhanced with manure addition, increasing it from 32.6 to 97.7 mg P kg-1. NaOH-Pi was the largest extractable Pi fraction and ranged from 144.3 to 250.6 mg P kg-1 and 107.5 to 213.2 mg P kg-1 in the unamended and manure amended treatments, respectively. Dry matter yield and P uptake by maize grown in the glasshouse were highly and significantly (p = 0.05) correlated with the different P fractions in the soil. The correlations followed the order resin P (r = 0.85) > NaOH-Pi (r = 0.85) > NaHCO3-Pi (r = 0.84) >> biomass P (r = 0.56) for dry matter yield at 6 weeks after planting. At 12 weeks after planting, goat manure had iv highly significant effects on resin P and biomass P but had no effect on NaHCO3-Pi and NaOH–Pi. The combination of biomass P, resin P and NaHCO3-Pi explained 75.8 percent of the variation in dry matter yield of which 63.0 percent of the variation was explained by biomass P alone. The greatest increase in biomass P occurred when added P was co-applied with 5 or 10 tha-1 goat manure. The predictive equation for maize dry matter yield (DM) was: DM (g) = 1.897 biomass P + 0.645 resin P (r = 0.73). Resin P was the fraction that was most depleted due to plant uptake and decreased by 56 to 68 percent between the 6th week and the 12th week of sampling indicating that it played a greater role in supplying plant available P. The results therefore suggested that the use of goat manure may allow resource poor farmers to use lower levels of commercial phosphate fertilizers because of its effect to reduce soil P sorption. In addition, higher increases in biomass P due to manure addition observed at lower rates of added P indicated that goat manure has potential for enhancing bioavailability and fertilizer use efficiency of small inorganic P applications.
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The approaches of traditional healers in the treatment of HIV/ AIDS: the case of Chris Hani District Municipality, Cala, Tsengiwe, Eastern cape, South Africa
- Authors: Mati, Similo
- Date: 2017
- Subjects: People with HIV and AIDS disease -- healers -- South Africa --Eastern Cape Traditional medicine -- South Africa -- Eastern Cape Healers -- South Africa -- Eastern Cape HIV infections -- Treatment -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5249 , vital:29171
- Description: In South Africa, just like in any other country within the African continent, traditional healing remains an integral part of many communities and this is not just restricted to the rural communities only, as is sometimes assumed. The main aim of this research was to explore the approaches of traditional healers in the treatment of HIV/AIDS in the Chris Hani District Municipality, Eastern Cape. The following research objectives were followed regarding the approaches of traditional healers in the treatment of HIV/AIDS: (i) to assess how traditional healers and people living with HIV/AIDS in Tsengiwe village understand HIV/AIDS, (ii) to investigate the reasons people living with HIV/AIDS consult traditional healers in Tsengiwe village, (iii) to assess Tsengiwe village traditional healers’ treatment strategies for HIV/AIDS, (iv) to establish how traditional healers view their role in the treatment of HIV/AIDS in Tsengiwe village. A qualitative research design was utilized, using in-depth interviews with traditional healers and focus group discussions with caregivers and people living with HIV/AIDS respectively. A type of non-probability sampling known as purposive sampling was used. A total of sixteen (16) participants were interviewed. The findings in this research revealed the following themes: (i) HIV/AIDS is incurable and it is understood by symptoms, (ii) belief system entrenched in traditional healing, (iii) cleansing rituals and traditional medicinal remedies and, (iv) strengthening relations between stakeholders. While traditional healers expressed a willingness to work with biomedical professionals in the management of HIV/AIDS, caregivers and people living with HIV/AIDS preferred going to clinics and hospitals for treatment. Furthermore, people living with HIV/AIDS in this research never admitted to consulting traditional healers for their ailments, only saying that they choose to self-medicate.
- Full Text:
- Authors: Mati, Similo
- Date: 2017
- Subjects: People with HIV and AIDS disease -- healers -- South Africa --Eastern Cape Traditional medicine -- South Africa -- Eastern Cape Healers -- South Africa -- Eastern Cape HIV infections -- Treatment -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5249 , vital:29171
- Description: In South Africa, just like in any other country within the African continent, traditional healing remains an integral part of many communities and this is not just restricted to the rural communities only, as is sometimes assumed. The main aim of this research was to explore the approaches of traditional healers in the treatment of HIV/AIDS in the Chris Hani District Municipality, Eastern Cape. The following research objectives were followed regarding the approaches of traditional healers in the treatment of HIV/AIDS: (i) to assess how traditional healers and people living with HIV/AIDS in Tsengiwe village understand HIV/AIDS, (ii) to investigate the reasons people living with HIV/AIDS consult traditional healers in Tsengiwe village, (iii) to assess Tsengiwe village traditional healers’ treatment strategies for HIV/AIDS, (iv) to establish how traditional healers view their role in the treatment of HIV/AIDS in Tsengiwe village. A qualitative research design was utilized, using in-depth interviews with traditional healers and focus group discussions with caregivers and people living with HIV/AIDS respectively. A type of non-probability sampling known as purposive sampling was used. A total of sixteen (16) participants were interviewed. The findings in this research revealed the following themes: (i) HIV/AIDS is incurable and it is understood by symptoms, (ii) belief system entrenched in traditional healing, (iii) cleansing rituals and traditional medicinal remedies and, (iv) strengthening relations between stakeholders. While traditional healers expressed a willingness to work with biomedical professionals in the management of HIV/AIDS, caregivers and people living with HIV/AIDS preferred going to clinics and hospitals for treatment. Furthermore, people living with HIV/AIDS in this research never admitted to consulting traditional healers for their ailments, only saying that they choose to self-medicate.
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Implementation of safety measures in selected public high schools in the Alfred Nzo East education district
- Authors: Mditshwa, Simbongile
- Date: 2020
- Subjects: Schools -- Security measures School safety and security
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10353/17895 , vital:41975
- Description: The main aim of the study was to find out how safety measures are implemented in selected public high schools in the Alfred Nzo East Education District. The study was motivated by multiple media reports about incidents that have to do with the safety of learners especially in rural public schools. This case study was grounded in the interpretive paradigm and the qualitative approach was adopted. The study was theoretically guided by the principles from both the Street-Level Bureaucracy (SLB) and the Rational Decision Making Model (RDMM). The data was collected from three schools in the Alfred Nzo East Education District, Eastern Cape, RSA. A purposive sampling technique was utilized to choose the research participants. A total of 21 human participants were involved in interviews where two teachers per school, two learners per school, two SGB parents and a principal were interviewed. Interviews were supplemented with short observations and document analysis. The findings of the research include the following: educators get a minimal empowerment to manage school safety in terms of access to school, scholar transport and on. The researched schools had no school-based safety policies. Some of the challenges included the level of roadworthiness of the vehicles that are used to transport school children which exposes learners to a high risk and that puts more pressure on school safety. Drugs and dangerous weapons are other factors which contribute to the instability of school safety. The researcher recommended that educators should be empowered through support from the principals and from the district coordinator through frequent policy implementation conference using online platform to minimize the costs of physical conferences. I recommended that the community must be active whistle-blowers for drug smuggling because drugs in schools emanate from the communities. Indemnity forms, release forms and school-based policies must be made available for implementation and referencing purposes. Schools should establish healthy relationship with external stakeholders like traditional leaders, SAPS and the Department of Social Development to curb lack of safety in schools.
- Full Text:
- Authors: Mditshwa, Simbongile
- Date: 2020
- Subjects: Schools -- Security measures School safety and security
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10353/17895 , vital:41975
- Description: The main aim of the study was to find out how safety measures are implemented in selected public high schools in the Alfred Nzo East Education District. The study was motivated by multiple media reports about incidents that have to do with the safety of learners especially in rural public schools. This case study was grounded in the interpretive paradigm and the qualitative approach was adopted. The study was theoretically guided by the principles from both the Street-Level Bureaucracy (SLB) and the Rational Decision Making Model (RDMM). The data was collected from three schools in the Alfred Nzo East Education District, Eastern Cape, RSA. A purposive sampling technique was utilized to choose the research participants. A total of 21 human participants were involved in interviews where two teachers per school, two learners per school, two SGB parents and a principal were interviewed. Interviews were supplemented with short observations and document analysis. The findings of the research include the following: educators get a minimal empowerment to manage school safety in terms of access to school, scholar transport and on. The researched schools had no school-based safety policies. Some of the challenges included the level of roadworthiness of the vehicles that are used to transport school children which exposes learners to a high risk and that puts more pressure on school safety. Drugs and dangerous weapons are other factors which contribute to the instability of school safety. The researcher recommended that educators should be empowered through support from the principals and from the district coordinator through frequent policy implementation conference using online platform to minimize the costs of physical conferences. I recommended that the community must be active whistle-blowers for drug smuggling because drugs in schools emanate from the communities. Indemnity forms, release forms and school-based policies must be made available for implementation and referencing purposes. Schools should establish healthy relationship with external stakeholders like traditional leaders, SAPS and the Department of Social Development to curb lack of safety in schools.
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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:
- 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
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Extraction and characterization of antimicrobial compounds from selected marine invertebrates collected from Phillip's Reef, Port Elizabeth in the Eastern Cape province of South Africa
- Authors: Kibungu, Cuthbert Wasswa
- Date: 2018
- Subjects: Invertebrates Bioactive compounds Anti-infective agents
- Language: English
- Type: Thesis , Masters , Microbiology
- Identifier: http://hdl.handle.net/10353/11751 , vital:39103
- Description: Introduction: The marine environment is rich in the biodiversity of medically significant invertebrate species such as sponges, ascidians, molluscs and bryozoans. Such a diverse environment is a potential source of a great variety of secondary metabolite production. Research in marine natural product discovery is gaining ground with the development of new therapeutic drugs of antimicrobial potential. Aim: This study seeks to evaluate, and identify bioactive compounds obtained from marine invertebrates collected from Phillip’s Reef in Algoa Bay. Methodology: Marine invertebrates were collected from the Phillip’s Reef in Algoa Bay, Port Elizabeth, at a depth of 12 m and the physichochemical parameters at the site of sample collection were recorded onsite. Sampling was done once over the four seasons in South Africa. Sections of each specimen were sent for identification, and extraction of compounds was done using organic solvents [methanol (95percent), hexane (95percent), petroleum ether (95percent), chloroform (95percent) and ethyl acetate (95percent)]. A ratio of 95percent the respective solvents was achieved by the following (1:19), organic solvent combinations [dichloromethane: methanol (1:1), hexane: chloroform: methanol (1:2:1)] and aqueous solution of water. Solvent optimization was done by measuring the absorbance of S. aureus (ATCC 49476) in Mueller Hinton Broth containing crude extracts at 600 nm. The appropriate solvent was then selected for further extraction of bioactive compounds from the specimens. Antimicrobial activity of the crude extracts was evaluated using the standard agar well diffusion method on test pathogens, namely, methicillin-resistant Staphylococcus aureus (ATCC 49476), clostridium difficile (ATCC 9689), Pseudomonas aeruginosa (ATCC 10145), Candida albicans (ATCC 10231) and Aspergillus fumigatus (ATCC 204305). Different concentrations of the crude extracts were used [100percent, 80percent, 60percent, 40percent and 30percent (v:v)] and the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) were determined. Selected bioactive crude extracts were further evaluated for phytochemicals before being purified by subjecting them to Sephadex-G75 column chromatography, using 75percent ethyl acetate as the mobile phase. Bioactive crude extracts fractions obtained following column chromatography were subjected to Electron Spray Ionization Time of Flight (ESI-TOF) analysis using The Bruker Daltonics maXis compact ESI Quadrupole TOF instrument to detect and identify compounds present. Peak identification was done using the blast software contained in Open Chrom Community Edition (Alder), open source software for chromatography and mass spectrometry spectrum analysis. Results: Sixty-seven different marine invertebrate species were collected over the 4 seasons. A mean temperature of 17.35oC ± 2.06 was recorded over all four seasons with the Autumn exhibiting the highest temperature (20oC). Salinity readings obtained ranged between 35.12 psu and 35.27 psu. A stable mean pH range of 8.08–8.78 was also recorded across all four seasons. Salinity and pH readings conformed to the standards set by the South African Water Quality Guidelines. The Spring season exhibited the highest turbidity of 2.97 NTU compared to other seasons. Ethyl acetate and dichloromethane: methanol (1:1) extracts yielded the best inhibitory results. Approximately 60percent (4/67) of the marine invertebrate specimens showed bioactivity against some of the test pathogens. Both ethyl acetate and dichloromethane methanol crude extracts of S14 and S34 showed a broad spectrum of antimicrobial activity against both bacteria and fungi. The C6 ethyl acetate crude extracts were highly active against MRSA, as inhibition zones of 45 mm were observed. MIC at 30percent concentrations was observed for very few crude extracts against the five pathogens. Sixty-three ethyl acetate crude extracts contained phytochemicals while only 35 dichloromethane: methanol crude extracts contained phytochemicals. Neither ethyl acetate and dichloromethane: methanol crude extracts of S34 (Psammopsinia sp. 1) that were biologically active had any phytochemicals. Canadine, Ginkolide A, Apigenin, Amygdalin, 10-hydroxy-Camptothecin, Catechin, Beta-Peltatin and 6 Ethoxy-3(4'-hydroxyphenyl)-4-methylcoumarin were identified in the crude extracts. Conclusion: Marine invertebrate species located at Phillip’s Reef produce compounds with antimicrobial potential. These compounds are biologically active against human pathogenic microorganisms. The best solvent to use for the extraction of these biologically significant metabolites is ethyl acetate, as this study achieved outstanding results from ethyl acetate crude extracts in the form of high zones of inhibition, for example the sponge Ectyonopsis flabellate, which exhibited mean inhibition zones of 45 mm against Aspergillus fumigatus. Similar bioactivity was also observed with Tedania (Tedania) Stylonychaeta against Methicillin Resistant Staphylococcus aureus. This is the first study done on some of the marine sponges and ascidians in the Phillip’s Reef, and therefore further evaluation of the purified compounds is necessary in order to obtain the identity of the pure compounds and possibly determine the mechanism of action, and synthesize structural analogues for further studies.
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- Authors: Kibungu, Cuthbert Wasswa
- Date: 2018
- Subjects: Invertebrates Bioactive compounds Anti-infective agents
- Language: English
- Type: Thesis , Masters , Microbiology
- Identifier: http://hdl.handle.net/10353/11751 , vital:39103
- Description: Introduction: The marine environment is rich in the biodiversity of medically significant invertebrate species such as sponges, ascidians, molluscs and bryozoans. Such a diverse environment is a potential source of a great variety of secondary metabolite production. Research in marine natural product discovery is gaining ground with the development of new therapeutic drugs of antimicrobial potential. Aim: This study seeks to evaluate, and identify bioactive compounds obtained from marine invertebrates collected from Phillip’s Reef in Algoa Bay. Methodology: Marine invertebrates were collected from the Phillip’s Reef in Algoa Bay, Port Elizabeth, at a depth of 12 m and the physichochemical parameters at the site of sample collection were recorded onsite. Sampling was done once over the four seasons in South Africa. Sections of each specimen were sent for identification, and extraction of compounds was done using organic solvents [methanol (95percent), hexane (95percent), petroleum ether (95percent), chloroform (95percent) and ethyl acetate (95percent)]. A ratio of 95percent the respective solvents was achieved by the following (1:19), organic solvent combinations [dichloromethane: methanol (1:1), hexane: chloroform: methanol (1:2:1)] and aqueous solution of water. Solvent optimization was done by measuring the absorbance of S. aureus (ATCC 49476) in Mueller Hinton Broth containing crude extracts at 600 nm. The appropriate solvent was then selected for further extraction of bioactive compounds from the specimens. Antimicrobial activity of the crude extracts was evaluated using the standard agar well diffusion method on test pathogens, namely, methicillin-resistant Staphylococcus aureus (ATCC 49476), clostridium difficile (ATCC 9689), Pseudomonas aeruginosa (ATCC 10145), Candida albicans (ATCC 10231) and Aspergillus fumigatus (ATCC 204305). Different concentrations of the crude extracts were used [100percent, 80percent, 60percent, 40percent and 30percent (v:v)] and the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) were determined. Selected bioactive crude extracts were further evaluated for phytochemicals before being purified by subjecting them to Sephadex-G75 column chromatography, using 75percent ethyl acetate as the mobile phase. Bioactive crude extracts fractions obtained following column chromatography were subjected to Electron Spray Ionization Time of Flight (ESI-TOF) analysis using The Bruker Daltonics maXis compact ESI Quadrupole TOF instrument to detect and identify compounds present. Peak identification was done using the blast software contained in Open Chrom Community Edition (Alder), open source software for chromatography and mass spectrometry spectrum analysis. Results: Sixty-seven different marine invertebrate species were collected over the 4 seasons. A mean temperature of 17.35oC ± 2.06 was recorded over all four seasons with the Autumn exhibiting the highest temperature (20oC). Salinity readings obtained ranged between 35.12 psu and 35.27 psu. A stable mean pH range of 8.08–8.78 was also recorded across all four seasons. Salinity and pH readings conformed to the standards set by the South African Water Quality Guidelines. The Spring season exhibited the highest turbidity of 2.97 NTU compared to other seasons. Ethyl acetate and dichloromethane: methanol (1:1) extracts yielded the best inhibitory results. Approximately 60percent (4/67) of the marine invertebrate specimens showed bioactivity against some of the test pathogens. Both ethyl acetate and dichloromethane methanol crude extracts of S14 and S34 showed a broad spectrum of antimicrobial activity against both bacteria and fungi. The C6 ethyl acetate crude extracts were highly active against MRSA, as inhibition zones of 45 mm were observed. MIC at 30percent concentrations was observed for very few crude extracts against the five pathogens. Sixty-three ethyl acetate crude extracts contained phytochemicals while only 35 dichloromethane: methanol crude extracts contained phytochemicals. Neither ethyl acetate and dichloromethane: methanol crude extracts of S34 (Psammopsinia sp. 1) that were biologically active had any phytochemicals. Canadine, Ginkolide A, Apigenin, Amygdalin, 10-hydroxy-Camptothecin, Catechin, Beta-Peltatin and 6 Ethoxy-3(4'-hydroxyphenyl)-4-methylcoumarin were identified in the crude extracts. Conclusion: Marine invertebrate species located at Phillip’s Reef produce compounds with antimicrobial potential. These compounds are biologically active against human pathogenic microorganisms. The best solvent to use for the extraction of these biologically significant metabolites is ethyl acetate, as this study achieved outstanding results from ethyl acetate crude extracts in the form of high zones of inhibition, for example the sponge Ectyonopsis flabellate, which exhibited mean inhibition zones of 45 mm against Aspergillus fumigatus. Similar bioactivity was also observed with Tedania (Tedania) Stylonychaeta against Methicillin Resistant Staphylococcus aureus. This is the first study done on some of the marine sponges and ascidians in the Phillip’s Reef, and therefore further evaluation of the purified compounds is necessary in order to obtain the identity of the pure compounds and possibly determine the mechanism of action, and synthesize structural analogues for further studies.
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Molecular epidemiology of vibrio pathogens in selected surface waters and treated final effluents of wastewater treatment plants in Chris Hani District Municipality in the Eastern Cape Province, South Africa
- Authors: Ayodeji, Onsula Charles
- Date: 2018
- Subjects: Sewage disposal plants Sewage -- Purification Water -- Purification -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Microbiology
- Identifier: http://hdl.handle.net/10353/10464 , vital:35478
- Description: Access to clean and safe water is essential for the survival of human beings. Nevertheless pollution from wastewater treatment plants (WWTPs) effluents often impacts the microbiological qualities of surface waters. Availability of freshwater resources is indispensable for preventing waterborne diseases. The current study evaluated the physicochemical properties and abundance of Vibrio species in selected rivers and WWTPs in the Eastern Cape Province of South Africa, over a one year sampling regime (December, 2016 to November, 2017). Water samples were collected monthly at designated locations along the banks of two rivers, treated effluents from 500 m upstream and downstream discharge points of two WWTPs and examined for physicochemical qualities, prevalence of Vibrio pathogens and their antibiogram profiles using both cultural and molecular techniques. The findings reveal the qualities of Tsomo and Great Fish river qualities with respect to electrical conductivity (EC) (137.75 – 377.69 mg/l), total suspended solids (TSS) (52.00 – 725.19 mg/l) and temperature (12.7 – 23 oC) and the treated effluents of WW-AD and WW-CR WWTPs with respect to EC (525.73 – 1071.89 mg/l), free chlorine (0.00 mg/l – 0.68 mg/l), temperature (12.4 – 28.8 oC), TSS (14.67 – 276.44 mg/l) exceeds the permissible limits set for effluent discharged to freshwater by South Africa guidelines. Other physicochemical qualities such as turbidity (63.11 – 797.17 NTU), BOD (3.30 – 5.26 mg/l) and TDS (68.88 – 148.14 mg/l) for Tsomo and Great Fish river and turbidity (20.33 – 310 NTU), biological oxygen demand (BOD) (1.28 – 4.96 mg/l), and total dissolve solid (TDS) (262.89 – 534.89 mg/l) for WWTPs WW-AD and WW-CR did not comply with WHO and EU standards as no regulation is set for them in the South African guidelines for domestic water usage. Statistical analysis revealed that pH, electrical conductivities, dissolved oxygen and total dissolved solid were significantly different whereas temperature did not differ significantly with respect to the four seasons (P < 0.05). The Vibrio densities for Great Fish river ranged between 0 and 3.29 log10 CFU/ml with the highest obtained in the spring. The Tsomo River Vibrio densities varied between 0 to 3.56 log10 CFU/ml and the maximum densities recorded during summer. The presumptive Vibrio densities in WW-AD and WW-CR WWTPs ranged from 0 to 3.67 log10 CFU/ml and 0 to 4.42 log10 CFU/ml with autumn and spring having the highest loads respectively. Molecular identification of the presumptive Vibrio species revealed 424 positive for the Vibrio genus. Of these, 21.69 percent, 11.79 percent, 8.25 percent and 2.12 percent were confirmed as V. cholerae, V. mimicus, V. parahaemolyticus and V. fluvialis respectively. The presence of potentially Vibrio pathogens in the rivers and treated effluents suggests potential public health threat to the communities relying on receiving watersheds where the effluents are discharged. Results of antibiotic sensitivity testing revealed high sensitivities against Ofloxacin (85.54 percent), Cefuroxime (81.93 percent), and Ciprofloxacin (74.70 percent), whereas resistance against other antibiotics follow this order: Imipenem (42.17 percent), Amoxicillin-Clavulanic Acid (54.17 percent), Ampicillin (63.54 percent), Nitrofurantoin (71.79 percent) and Polymyxin B (97.44 percent). Surprisingly, the resistance of Vibrio species against the known effective Carbapenems was relatively high (Meropenem (38.54 percent) and Imipenem (58.88 percent). Multiple antibiotic resistance phenotypes (MARP) of the isolates were resistant to two or more antibiotics whereas the calculated multiple antibiotic resistance index (MARI) ranged from 0.2 to 0.7. The observed high multiple antibiotics index suggest the recovered Vibrio pathogens are of high antimicrobial usage origin. Increase in antimicrobial resistance profiles towards conventionally used antibiotics as indicated in this study calls for adequate sanitation facilities and proper surveillance programs towards monitoring of antimicrobial resistance determinants in wastewater treatment effluents and receiving watersheds. This will in turn enhance early detection of resistant strains of public health importance, and supports the prompt notification and investigation of outbreaks. It further advocates the need for constant monitoring programme by the relevant regulatory agencies to ensure total compliance of the wastewater treatment facilities to the stipulated standards.
- Full Text:
- Authors: Ayodeji, Onsula Charles
- Date: 2018
- Subjects: Sewage disposal plants Sewage -- Purification Water -- Purification -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Microbiology
- Identifier: http://hdl.handle.net/10353/10464 , vital:35478
- Description: Access to clean and safe water is essential for the survival of human beings. Nevertheless pollution from wastewater treatment plants (WWTPs) effluents often impacts the microbiological qualities of surface waters. Availability of freshwater resources is indispensable for preventing waterborne diseases. The current study evaluated the physicochemical properties and abundance of Vibrio species in selected rivers and WWTPs in the Eastern Cape Province of South Africa, over a one year sampling regime (December, 2016 to November, 2017). Water samples were collected monthly at designated locations along the banks of two rivers, treated effluents from 500 m upstream and downstream discharge points of two WWTPs and examined for physicochemical qualities, prevalence of Vibrio pathogens and their antibiogram profiles using both cultural and molecular techniques. The findings reveal the qualities of Tsomo and Great Fish river qualities with respect to electrical conductivity (EC) (137.75 – 377.69 mg/l), total suspended solids (TSS) (52.00 – 725.19 mg/l) and temperature (12.7 – 23 oC) and the treated effluents of WW-AD and WW-CR WWTPs with respect to EC (525.73 – 1071.89 mg/l), free chlorine (0.00 mg/l – 0.68 mg/l), temperature (12.4 – 28.8 oC), TSS (14.67 – 276.44 mg/l) exceeds the permissible limits set for effluent discharged to freshwater by South Africa guidelines. Other physicochemical qualities such as turbidity (63.11 – 797.17 NTU), BOD (3.30 – 5.26 mg/l) and TDS (68.88 – 148.14 mg/l) for Tsomo and Great Fish river and turbidity (20.33 – 310 NTU), biological oxygen demand (BOD) (1.28 – 4.96 mg/l), and total dissolve solid (TDS) (262.89 – 534.89 mg/l) for WWTPs WW-AD and WW-CR did not comply with WHO and EU standards as no regulation is set for them in the South African guidelines for domestic water usage. Statistical analysis revealed that pH, electrical conductivities, dissolved oxygen and total dissolved solid were significantly different whereas temperature did not differ significantly with respect to the four seasons (P < 0.05). The Vibrio densities for Great Fish river ranged between 0 and 3.29 log10 CFU/ml with the highest obtained in the spring. The Tsomo River Vibrio densities varied between 0 to 3.56 log10 CFU/ml and the maximum densities recorded during summer. The presumptive Vibrio densities in WW-AD and WW-CR WWTPs ranged from 0 to 3.67 log10 CFU/ml and 0 to 4.42 log10 CFU/ml with autumn and spring having the highest loads respectively. Molecular identification of the presumptive Vibrio species revealed 424 positive for the Vibrio genus. Of these, 21.69 percent, 11.79 percent, 8.25 percent and 2.12 percent were confirmed as V. cholerae, V. mimicus, V. parahaemolyticus and V. fluvialis respectively. The presence of potentially Vibrio pathogens in the rivers and treated effluents suggests potential public health threat to the communities relying on receiving watersheds where the effluents are discharged. Results of antibiotic sensitivity testing revealed high sensitivities against Ofloxacin (85.54 percent), Cefuroxime (81.93 percent), and Ciprofloxacin (74.70 percent), whereas resistance against other antibiotics follow this order: Imipenem (42.17 percent), Amoxicillin-Clavulanic Acid (54.17 percent), Ampicillin (63.54 percent), Nitrofurantoin (71.79 percent) and Polymyxin B (97.44 percent). Surprisingly, the resistance of Vibrio species against the known effective Carbapenems was relatively high (Meropenem (38.54 percent) and Imipenem (58.88 percent). Multiple antibiotic resistance phenotypes (MARP) of the isolates were resistant to two or more antibiotics whereas the calculated multiple antibiotic resistance index (MARI) ranged from 0.2 to 0.7. The observed high multiple antibiotics index suggest the recovered Vibrio pathogens are of high antimicrobial usage origin. Increase in antimicrobial resistance profiles towards conventionally used antibiotics as indicated in this study calls for adequate sanitation facilities and proper surveillance programs towards monitoring of antimicrobial resistance determinants in wastewater treatment effluents and receiving watersheds. This will in turn enhance early detection of resistant strains of public health importance, and supports the prompt notification and investigation of outbreaks. It further advocates the need for constant monitoring programme by the relevant regulatory agencies to ensure total compliance of the wastewater treatment facilities to the stipulated standards.
- Full Text:
An assessment of the role of the Speaker in the management of the National Assembly: the case of a democratic South Africa
- Authors: Lunyawo, Sipho
- Date: 2022-12
- Subjects: Legislative bodies -- South Africa -- Presiding officers , Mediation -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26742 , vital:65976
- Description: This study interrogates the role of the Speaker in the management of the National Assembly in post-apartheid South Africa. The major focus is on the tenure of the fifth Speaker which was marked with widespread parliament disruptions largely orchestrated by opposition parties. The research employed a qualitative secondary data methodology in which data was collected from secondary sources such as government documents and newspapers. Content analysis and critical discourse analysis were used to analyze data. The Study found that the Speaker plays a fundamental role in the management of the National Assembly. Nevertheless, the study also established that there are numerous challenges faced by the Speaker in the management of the National Assembly. The challenges include mediating the chaos and conflicts among members. The study also established the nature and causes of chaos in the House as well as the efforts put in place by the Speaker to encourage fair debate among MPs. The study concludes that the role of the Speaker in monitoring and regulating the House is crucial in ensuring that there is order in the House at any given time. This is also because the Speaker plays a fundamental role as the Peacekeeper of the House and this emanates from the Speaker’s role in the management of the House. Based on the findings and conclusions of the Study, three recommendations were put forward and these are; embracing a system where the Speaker is independent, introducing hefty penalties against deliberate misconduct, and the use of previous unfavorable incidents to amend the rules of the House. , Thesis (MPA) -- Faculty of Management and Commerce, 2022
- Full Text:
- Authors: Lunyawo, Sipho
- Date: 2022-12
- Subjects: Legislative bodies -- South Africa -- Presiding officers , Mediation -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26742 , vital:65976
- Description: This study interrogates the role of the Speaker in the management of the National Assembly in post-apartheid South Africa. The major focus is on the tenure of the fifth Speaker which was marked with widespread parliament disruptions largely orchestrated by opposition parties. The research employed a qualitative secondary data methodology in which data was collected from secondary sources such as government documents and newspapers. Content analysis and critical discourse analysis were used to analyze data. The Study found that the Speaker plays a fundamental role in the management of the National Assembly. Nevertheless, the study also established that there are numerous challenges faced by the Speaker in the management of the National Assembly. The challenges include mediating the chaos and conflicts among members. The study also established the nature and causes of chaos in the House as well as the efforts put in place by the Speaker to encourage fair debate among MPs. The study concludes that the role of the Speaker in monitoring and regulating the House is crucial in ensuring that there is order in the House at any given time. This is also because the Speaker plays a fundamental role as the Peacekeeper of the House and this emanates from the Speaker’s role in the management of the House. Based on the findings and conclusions of the Study, three recommendations were put forward and these are; embracing a system where the Speaker is independent, introducing hefty penalties against deliberate misconduct, and the use of previous unfavorable incidents to amend the rules of the House. , Thesis (MPA) -- Faculty of Management and Commerce, 2022
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The Impact of capital structure on performance of banks in South Africa
- Authors: Jiza, Andiswa Abongile
- Date: 2019
- Subjects: Banks and banking Capital management and capital structure
- Language: English
- Type: Thesis , Masters , MCom (Economics)
- Identifier: http://hdl.handle.net/10353/16895 , vital:40783
- Description: The study examined the relationship between capital structure and bank performance in South Africa using five small banks and the two big banks from 2002-2017. Fixed effects model, Pooled and the random effects model were utilised to test the relationship between capital structure and bank performance. Return on assets and the earnings per share were used as a measure for financial performance while the debt to equity ratio and the debt to assets ratio were used as proxies for capital structure. The results show that there is a negative significant relationship between return on assets and the two capital structure measures meaning that higher leverage ratios lead to lower profits measured by return on assets. while there is a negative significant relationship between earnings per share and the capital structure meaning that higher leverage ratios lead to lower profits. The study recommends that financial managers of banks should maintain lower debt than equity in their mix of capital structure as more debts is not good for the performance of banks.
- Full Text:
- Authors: Jiza, Andiswa Abongile
- Date: 2019
- Subjects: Banks and banking Capital management and capital structure
- Language: English
- Type: Thesis , Masters , MCom (Economics)
- Identifier: http://hdl.handle.net/10353/16895 , vital:40783
- Description: The study examined the relationship between capital structure and bank performance in South Africa using five small banks and the two big banks from 2002-2017. Fixed effects model, Pooled and the random effects model were utilised to test the relationship between capital structure and bank performance. Return on assets and the earnings per share were used as a measure for financial performance while the debt to equity ratio and the debt to assets ratio were used as proxies for capital structure. The results show that there is a negative significant relationship between return on assets and the two capital structure measures meaning that higher leverage ratios lead to lower profits measured by return on assets. while there is a negative significant relationship between earnings per share and the capital structure meaning that higher leverage ratios lead to lower profits. The study recommends that financial managers of banks should maintain lower debt than equity in their mix of capital structure as more debts is not good for the performance of banks.
- Full Text: