Pre-concentration of toxic metals using electrospun amino-functionalized nylon-6 nanofibre sorbent
- Darko, Godfrey, Sobola, Abdullahi O, Adewuyi, Sheriff, Okonkwo, J O, Torto, Nelson
- Authors: Darko, Godfrey , Sobola, Abdullahi O , Adewuyi, Sheriff , Okonkwo, J O , Torto, Nelson
- Date: 2012
- Language: English
- Type: Article
- Identifier: vital:6571 , http://hdl.handle.net/10962/d1004134
- Description: This paper presents a new approach for pre-concentrating toxic metals (As, Cd, Ni and Pb) in aqueous environments using an amino-functionalized electrospun nanofibre sorbent. The sorbent, composed of nanofibres of average diameter 80 ± 10 nm and specific surface area of 58m2 g–1, exhibited fast adsorption kinetics (<20 min) for As, Cd, Ni and Pb. The optimalpHfor the uptake of As, Cd, Ni and Pb were 5.5, 6.0, 6.5 and 11, respectively. The adsorption process best fitted the Freundlich isothermand followed the first-order kinetics. The highest pre-concentration achieved using the sorbent was 41.99 (Ni in treated wastewater). The capacity of the sorbent to pre-concentrate the toxic metals was compared with those of aqua regia and HNO3+H2O2 digestions. The pre-concentration factors achieved for Cd in river water samples can be ranked as aqua regia digestion (0.73) > adsorption (0.34)>HNO3+H2O2 (0.23) digestion.Asimilar trend was observed for Ni in river water as well as Ni andCdin tap water samples. Pb ions in the river water samples were pre-concentrated slightly better using the two digestion methods pre-concentration factors ~22) compared to adsorption method (pre-concentration factor ~21). The use of the electrospun amino-functionalized nanofibre sorbent presentsanefficientand cost-effective alternative for pre-concentration of toxic metals inaqueousenvironments.
- Full Text:
- Date Issued: 2012
- Authors: Darko, Godfrey , Sobola, Abdullahi O , Adewuyi, Sheriff , Okonkwo, J O , Torto, Nelson
- Date: 2012
- Language: English
- Type: Article
- Identifier: vital:6571 , http://hdl.handle.net/10962/d1004134
- Description: This paper presents a new approach for pre-concentrating toxic metals (As, Cd, Ni and Pb) in aqueous environments using an amino-functionalized electrospun nanofibre sorbent. The sorbent, composed of nanofibres of average diameter 80 ± 10 nm and specific surface area of 58m2 g–1, exhibited fast adsorption kinetics (<20 min) for As, Cd, Ni and Pb. The optimalpHfor the uptake of As, Cd, Ni and Pb were 5.5, 6.0, 6.5 and 11, respectively. The adsorption process best fitted the Freundlich isothermand followed the first-order kinetics. The highest pre-concentration achieved using the sorbent was 41.99 (Ni in treated wastewater). The capacity of the sorbent to pre-concentrate the toxic metals was compared with those of aqua regia and HNO3+H2O2 digestions. The pre-concentration factors achieved for Cd in river water samples can be ranked as aqua regia digestion (0.73) > adsorption (0.34)>HNO3+H2O2 (0.23) digestion.Asimilar trend was observed for Ni in river water as well as Ni andCdin tap water samples. Pb ions in the river water samples were pre-concentrated slightly better using the two digestion methods pre-concentration factors ~22) compared to adsorption method (pre-concentration factor ~21). The use of the electrospun amino-functionalized nanofibre sorbent presentsanefficientand cost-effective alternative for pre-concentration of toxic metals inaqueousenvironments.
- Full Text:
- Date Issued: 2012
Prediction of water temperature metrics using spatial modelling in the Eastern and Western Cape, South Africa
- Rivers-Moore, Nick A, Mantel, Sukhmani K, Dallas, Helen F
- Authors: Rivers-Moore, Nick A , Mantel, Sukhmani K , Dallas, Helen F
- Date: 2012
- Language: English
- Type: text , Article
- Identifier: vital:7071 , http://hdl.handle.net/10962/d1003947 , http://www.scielo.org.za/scielo.php?pid=S1816-79502012000200002&script=sci_arttext
- Description: Key aspects of a river's temperature regime are described by magnitudes, timing and durations of thermal events, and frequencies of extreme exceedance events. To understand alterations to thermal regimes, it is necessary to describe thermal time series based on these statistics. Classification of sites based on their thermal metrics, and understanding of spatial patterns of these thermal statistics, provides a powerful approach for comparing study sites against reference sites. Water temperature regime dynamics should be viewed regionally, where regional divisions have an inherent underpinning by an understanding of natural thermal variability. The aim of this research was to link key water temperature metrics to readily-mapped environmental surrogates, and to produce spatial images of temperature metrics: 37 temperature metrics were derived for 12 months of sub-daily water temperatures at 90 sites in the Eastern Cape and Western Cape provinces, South Africa. These metrics were correlated with 16 environmental variables. Correlations enabled development of multiple regression models which facilitated mapping of temperature metrics over the study area. This approach has the potential to be applied at a national scale as more thermal time series are collected nationally. It is argued that the appropriateness of management decisions in rivers can be improved by including guidelines for thermal metrics at a regional scale. Such maps could facilitate incorporation of a temperature component into management guidelines for water resources.
- Full Text:
- Date Issued: 2012
- Authors: Rivers-Moore, Nick A , Mantel, Sukhmani K , Dallas, Helen F
- Date: 2012
- Language: English
- Type: text , Article
- Identifier: vital:7071 , http://hdl.handle.net/10962/d1003947 , http://www.scielo.org.za/scielo.php?pid=S1816-79502012000200002&script=sci_arttext
- Description: Key aspects of a river's temperature regime are described by magnitudes, timing and durations of thermal events, and frequencies of extreme exceedance events. To understand alterations to thermal regimes, it is necessary to describe thermal time series based on these statistics. Classification of sites based on their thermal metrics, and understanding of spatial patterns of these thermal statistics, provides a powerful approach for comparing study sites against reference sites. Water temperature regime dynamics should be viewed regionally, where regional divisions have an inherent underpinning by an understanding of natural thermal variability. The aim of this research was to link key water temperature metrics to readily-mapped environmental surrogates, and to produce spatial images of temperature metrics: 37 temperature metrics were derived for 12 months of sub-daily water temperatures at 90 sites in the Eastern Cape and Western Cape provinces, South Africa. These metrics were correlated with 16 environmental variables. Correlations enabled development of multiple regression models which facilitated mapping of temperature metrics over the study area. This approach has the potential to be applied at a national scale as more thermal time series are collected nationally. It is argued that the appropriateness of management decisions in rivers can be improved by including guidelines for thermal metrics at a regional scale. Such maps could facilitate incorporation of a temperature component into management guidelines for water resources.
- Full Text:
- Date Issued: 2012
Prediction of water temperature metrics using spatial modelling in the Eastern and Western Cape, South Africa
- Rivers-Moore, Nick A, Mantel, Sukhmani K, Dallas, Helen F
- Authors: Rivers-Moore, Nick A , Mantel, Sukhmani K , Dallas, Helen F
- Date: 2012
- Subjects: To be catalogued
- Language: English
- Type: text , report
- Identifier: http://hdl.handle.net/10962/438180 , vital:73441 , ISBN 1816-7950 , https://wrcwebsite.azurewebsites.net/wp-content/uploads/mdocs/2651.pdf
- Description: Key aspects of a river’s temperature regime are described by magnitudes, timing and durations of thermal events, and frequencies of extreme exceedance events. To understand alterations to thermal regimes, it is necessary to describe thermal time series based on these statistics. Classification of sites based on their thermal met-rics, and understanding of spatial patterns of these thermal statistics, provides a powerful approach for comparing study sites against reference sites. Water tem-perature regime dynamics should be viewed regionally, where regional divisions have an inherent underpinning by an understanding of natural thermal variability. The aim of this research was to link key water temperature metrics to readi-lymapped environmental surrogates, and to produce spatial images of temperature metrics: 37 temperature metrics were derived for 12 months of sub-daily water temperatures at 90 sites in the Eastern Cape and Western Cape provinces, South Africa.
- Full Text:
- Date Issued: 2012
- Authors: Rivers-Moore, Nick A , Mantel, Sukhmani K , Dallas, Helen F
- Date: 2012
- Subjects: To be catalogued
- Language: English
- Type: text , report
- Identifier: http://hdl.handle.net/10962/438180 , vital:73441 , ISBN 1816-7950 , https://wrcwebsite.azurewebsites.net/wp-content/uploads/mdocs/2651.pdf
- Description: Key aspects of a river’s temperature regime are described by magnitudes, timing and durations of thermal events, and frequencies of extreme exceedance events. To understand alterations to thermal regimes, it is necessary to describe thermal time series based on these statistics. Classification of sites based on their thermal met-rics, and understanding of spatial patterns of these thermal statistics, provides a powerful approach for comparing study sites against reference sites. Water tem-perature regime dynamics should be viewed regionally, where regional divisions have an inherent underpinning by an understanding of natural thermal variability. The aim of this research was to link key water temperature metrics to readi-lymapped environmental surrogates, and to produce spatial images of temperature metrics: 37 temperature metrics were derived for 12 months of sub-daily water temperatures at 90 sites in the Eastern Cape and Western Cape provinces, South Africa.
- Full Text:
- Date Issued: 2012
Prevalence, seasonal trends and incidences of cattle tuberculosis and brucellosis in the Cacadu municipality, Eastern Cape, South Africa
- Authors: Nombebe, Thobeka
- Date: 2012
- Subjects: Tuberculosis in cattle -- South Africa -- Eastern Cape , Brucellosis in animals -- South Africa -- Eastern Cape , Dairy farms -- South Africa -- Eastern Cape , Mycobacterium tuberculosis -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc (Biostatistics and Epidemiology)
- Identifier: vital:11783 , http://hdl.handle.net/10353/d1016200 , Tuberculosis in cattle -- South Africa -- Eastern Cape , Brucellosis in animals -- South Africa -- Eastern Cape , Dairy farms -- South Africa -- Eastern Cape , Mycobacterium tuberculosis -- South Africa -- Eastern Cape
- Description: A cross-sectional study was conducted from February 2011 to August 2012 to investigate the status and identify risk factors for Bovine Tuberculosis (BTB) and cattle Brucellosis. A total of 1277 cattle from 6 selected dairy farms were tested. The farms were purposively selected on suspected risk. Samples were analysed using Rose Bengal Test (RBPT) and Complement Fixation Test (CFT) for Brucellosis and Comparative Intradermal Tuberculin Test (CITT) for BTB. The results revealed the overall prevalence of 1.6% for Brucellosis and no BTB was found. Logistic regression analysis revealed that age of cattle, herd size and number of calves a cow has had significant association with Brucellosis with p-values 0.0071, 0.0490 and 0.000 respectively. The role of location (p>0.05), gender (p>0.05) and breed (p>0.05) in the occurrence of the disease was not statistically significant at α=0.05, although higher rates were obtained in females and Jersey breed. Questionnaires were also administered to 47 individuals a total of 12 females and 35 males. Most respondents were not aware about cattle brucellosis and cattle tuberculosis. Consumption of raw or unpasteurized milk still occurs with 74.75% of respondents revealed.
- Full Text:
- Date Issued: 2012
- Authors: Nombebe, Thobeka
- Date: 2012
- Subjects: Tuberculosis in cattle -- South Africa -- Eastern Cape , Brucellosis in animals -- South Africa -- Eastern Cape , Dairy farms -- South Africa -- Eastern Cape , Mycobacterium tuberculosis -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc (Biostatistics and Epidemiology)
- Identifier: vital:11783 , http://hdl.handle.net/10353/d1016200 , Tuberculosis in cattle -- South Africa -- Eastern Cape , Brucellosis in animals -- South Africa -- Eastern Cape , Dairy farms -- South Africa -- Eastern Cape , Mycobacterium tuberculosis -- South Africa -- Eastern Cape
- Description: A cross-sectional study was conducted from February 2011 to August 2012 to investigate the status and identify risk factors for Bovine Tuberculosis (BTB) and cattle Brucellosis. A total of 1277 cattle from 6 selected dairy farms were tested. The farms were purposively selected on suspected risk. Samples were analysed using Rose Bengal Test (RBPT) and Complement Fixation Test (CFT) for Brucellosis and Comparative Intradermal Tuberculin Test (CITT) for BTB. The results revealed the overall prevalence of 1.6% for Brucellosis and no BTB was found. Logistic regression analysis revealed that age of cattle, herd size and number of calves a cow has had significant association with Brucellosis with p-values 0.0071, 0.0490 and 0.000 respectively. The role of location (p>0.05), gender (p>0.05) and breed (p>0.05) in the occurrence of the disease was not statistically significant at α=0.05, although higher rates were obtained in females and Jersey breed. Questionnaires were also administered to 47 individuals a total of 12 females and 35 males. Most respondents were not aware about cattle brucellosis and cattle tuberculosis. Consumption of raw or unpasteurized milk still occurs with 74.75% of respondents revealed.
- Full Text:
- Date Issued: 2012
Prevention of mother to child transmission (PMTCT) of HIV/AIDS: a review of using PMTCT services in South Africa
- Authors: Jumare, Fadila
- Date: 2012
- Subjects: AIDS (Disease) in pregnancy -- South Africa -- Prevention , AIDS (Disease) -- South Africa -- Prevention , HIV infections -- Transmission -- South Africa , Antiretroviral agents
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9091 , http://hdl.handle.net/10948/d1011508 , AIDS (Disease) in pregnancy -- South Africa -- Prevention , AIDS (Disease) -- South Africa -- Prevention , HIV infections -- Transmission -- South Africa , Antiretroviral agents
- Description: Despite good intentions and commitment from health providers, it is difficult for HIV positive pregnant women to access Prevention of Mother to Child Transmission of HIV (PMTCT) services (Skinner et al 2005:115). The aim of this research was to find out the extent to which socio-economic and cultural factors influence access to and utilization of PMTCT services. It appeared that despite having a legal plan and framework to ensure that PMTCT services are available and free, the realities confronting HIV positive women in South Africa as suggested by the literature contradicted this objective. Inevitably, these contradictions were identified as some of the main factors contributing to lack of access and inadequate utilization of PMTCT services. These factors were identified through a review of fifteen studies selected based on their relevance to the research aim. The findings were presented according to the following themes: Functioning of clinics, adherence to ART, uptake of VCT and infant feeding practices. According to research evidence, the major socio-cultural factors influencing access and utilization of PMTCT services include fear of stigma and discrimination which are related to cultural norms and practices. The socio-economic factors include transport costs, lack of food, medicines and formula milk which are all related to poverty and unemployment. The research also found that health system constraints such as long waiting times in clinics, stock-outs of formula milk, medicines and test kits influenced the utilization of PMTCT services by HIV positive women.
- Full Text:
- Date Issued: 2012
- Authors: Jumare, Fadila
- Date: 2012
- Subjects: AIDS (Disease) in pregnancy -- South Africa -- Prevention , AIDS (Disease) -- South Africa -- Prevention , HIV infections -- Transmission -- South Africa , Antiretroviral agents
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9091 , http://hdl.handle.net/10948/d1011508 , AIDS (Disease) in pregnancy -- South Africa -- Prevention , AIDS (Disease) -- South Africa -- Prevention , HIV infections -- Transmission -- South Africa , Antiretroviral agents
- Description: Despite good intentions and commitment from health providers, it is difficult for HIV positive pregnant women to access Prevention of Mother to Child Transmission of HIV (PMTCT) services (Skinner et al 2005:115). The aim of this research was to find out the extent to which socio-economic and cultural factors influence access to and utilization of PMTCT services. It appeared that despite having a legal plan and framework to ensure that PMTCT services are available and free, the realities confronting HIV positive women in South Africa as suggested by the literature contradicted this objective. Inevitably, these contradictions were identified as some of the main factors contributing to lack of access and inadequate utilization of PMTCT services. These factors were identified through a review of fifteen studies selected based on their relevance to the research aim. The findings were presented according to the following themes: Functioning of clinics, adherence to ART, uptake of VCT and infant feeding practices. According to research evidence, the major socio-cultural factors influencing access and utilization of PMTCT services include fear of stigma and discrimination which are related to cultural norms and practices. The socio-economic factors include transport costs, lack of food, medicines and formula milk which are all related to poverty and unemployment. The research also found that health system constraints such as long waiting times in clinics, stock-outs of formula milk, medicines and test kits influenced the utilization of PMTCT services by HIV positive women.
- Full Text:
- Date Issued: 2012
Primary education and rural community development in King William's Town District
- Authors: Rawana, Yolisa
- Date: 2012
- Subjects: Education, Rural , Community development -- South Africa -- King William's Town , Rural development -- South Africa -- King William's Town
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9054 , http://hdl.handle.net/10948/d1007750 , Education, Rural , Community development -- South Africa -- King William's Town , Rural development -- South Africa -- King William's Town
- Description: The focus of this research was to investigate the lack of access to primary education in King William's Town district in Eastern Cape which is inhibiting rural community development. The aim of the study was to determine whether geographic location have effects on attendance of school, to perceive gender discrepancy in primary education, to investigate what cost as a factor that contributes to a child's access and attendance to a primary education and to make recommendations to improve the situation. The study followed a descriptive research method. Data was collected by studying relevant existing literature. Document analysis was used to analyse the data and recommendations for improvement were made. The findings revealed that the day to day attendance of learners is below what it should be, which lead to dropouts, non-compliance with legislation, inadequate monitoring and evaluation. There is a need to recruit Department officials with a particular level of education, knowledge, understanding and expertise to minimise the chances of failure. Recommendations are finally made to mitigate the problem situation
- Full Text:
- Date Issued: 2012
- Authors: Rawana, Yolisa
- Date: 2012
- Subjects: Education, Rural , Community development -- South Africa -- King William's Town , Rural development -- South Africa -- King William's Town
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9054 , http://hdl.handle.net/10948/d1007750 , Education, Rural , Community development -- South Africa -- King William's Town , Rural development -- South Africa -- King William's Town
- Description: The focus of this research was to investigate the lack of access to primary education in King William's Town district in Eastern Cape which is inhibiting rural community development. The aim of the study was to determine whether geographic location have effects on attendance of school, to perceive gender discrepancy in primary education, to investigate what cost as a factor that contributes to a child's access and attendance to a primary education and to make recommendations to improve the situation. The study followed a descriptive research method. Data was collected by studying relevant existing literature. Document analysis was used to analyse the data and recommendations for improvement were made. The findings revealed that the day to day attendance of learners is below what it should be, which lead to dropouts, non-compliance with legislation, inadequate monitoring and evaluation. There is a need to recruit Department officials with a particular level of education, knowledge, understanding and expertise to minimise the chances of failure. Recommendations are finally made to mitigate the problem situation
- Full Text:
- Date Issued: 2012
Private sector participation in renewable energy: a survey of listed companies in South Africa
- Authors: Eno, Venessa Asik Awo
- Date: 2012
- Subjects: Renewable energy sources -- South Africa , Energy policy -- South Africa , Public-private sector cooperation -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9114 , http://hdl.handle.net/10948/d1015636
- Description: Although renewable energy technology has received much attention over recent years the depletion of known fossil fuel reserves and the volatility of international fuel prices require that society looks beyond the current coal-dominated electricity generation methods. Investment in renewable energy and energy efficiency is important to reduce the negative economic, social and environmental impacts of energy production and consumption in South Africa. Currently, renewable energy contributes relatively little to primary energy and even less to the consumption of commercial energy. The challenge of transforming entire economies is enormous, especially if a country is as fossil-fuel-based and emission-intensive as South Africa. However, as it is already facing climate change impacts in an increasingly carbon constrained world; South Africa must drastically reduce its greenhouse gas emission intensity soon. The South African electricity sector is a vital part of the economy and at the same time contributes most to the emission problem. Transforming this sector is therefore urgently needed. First steps have been taken to enhance energy efficiency and promote renewable energy, but they have failed to have any large-scale effects. The two major barriers to investments in renewable energy technologies are based in the South African energy innovation system and its inherent power structures and in the economics of renewable energy technologies. Subsequently the private sector will have to play a significant role in closing the human resources gap by providing funds and expertise. Furthermore, the creation of employment opportunities and actively promoting structural change in the economy are seen, especially in industrialized countries, as goals that support the promotion of renewable energy. Moreover, with more support and assistance from the government and partnership with the private sector will be of immense help to achieve renewable energy goals.
- Full Text:
- Date Issued: 2012
- Authors: Eno, Venessa Asik Awo
- Date: 2012
- Subjects: Renewable energy sources -- South Africa , Energy policy -- South Africa , Public-private sector cooperation -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9114 , http://hdl.handle.net/10948/d1015636
- Description: Although renewable energy technology has received much attention over recent years the depletion of known fossil fuel reserves and the volatility of international fuel prices require that society looks beyond the current coal-dominated electricity generation methods. Investment in renewable energy and energy efficiency is important to reduce the negative economic, social and environmental impacts of energy production and consumption in South Africa. Currently, renewable energy contributes relatively little to primary energy and even less to the consumption of commercial energy. The challenge of transforming entire economies is enormous, especially if a country is as fossil-fuel-based and emission-intensive as South Africa. However, as it is already facing climate change impacts in an increasingly carbon constrained world; South Africa must drastically reduce its greenhouse gas emission intensity soon. The South African electricity sector is a vital part of the economy and at the same time contributes most to the emission problem. Transforming this sector is therefore urgently needed. First steps have been taken to enhance energy efficiency and promote renewable energy, but they have failed to have any large-scale effects. The two major barriers to investments in renewable energy technologies are based in the South African energy innovation system and its inherent power structures and in the economics of renewable energy technologies. Subsequently the private sector will have to play a significant role in closing the human resources gap by providing funds and expertise. Furthermore, the creation of employment opportunities and actively promoting structural change in the economy are seen, especially in industrialized countries, as goals that support the promotion of renewable energy. Moreover, with more support and assistance from the government and partnership with the private sector will be of immense help to achieve renewable energy goals.
- Full Text:
- Date Issued: 2012
Problems encountered with the implementation of an activity-based costing system
- Authors: Konan, Nangan Christian
- Date: 2012
- Subjects: Managerial accounting , Cost allocation
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:8979 , http://hdl.handle.net/10948/d1018653
- Description: The activity-based costing (ABC) system is a cost allocation technique which appears to have many benefits over the traditional costing systems. However, companies that have attempted to implement ABC have encountered various difficulties. Thus, there is a need to investigate the problems faced by companies while implementing ABC. The main objective of this study was to find solutions to overcome the problems encountered by South African companies during the implementation of an activity-based costing system.
- Full Text:
- Date Issued: 2012
- Authors: Konan, Nangan Christian
- Date: 2012
- Subjects: Managerial accounting , Cost allocation
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:8979 , http://hdl.handle.net/10948/d1018653
- Description: The activity-based costing (ABC) system is a cost allocation technique which appears to have many benefits over the traditional costing systems. However, companies that have attempted to implement ABC have encountered various difficulties. Thus, there is a need to investigate the problems faced by companies while implementing ABC. The main objective of this study was to find solutions to overcome the problems encountered by South African companies during the implementation of an activity-based costing system.
- Full Text:
- Date Issued: 2012
Productions of high quality wastewater final effluents remain a challenge in the Eastern Cape Province of South Africa
- Authors: Gusha, Siyabulela Stability
- Date: 2012
- Subjects: Water-supply, Rural -- Health aspects -- South Africa , Pathogenic microorganisms -- South Africa -- Eastern Cape , Water-supply, Rural -- South Africa -- Eastern Cape , Effluent quality -- Testing , Sewage disposal plants -- South Africa -- Eastern Cape , Escherichia coli
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11265 , http://hdl.handle.net/10353/489 , Water-supply, Rural -- Health aspects -- South Africa , Pathogenic microorganisms -- South Africa -- Eastern Cape , Water-supply, Rural -- South Africa -- Eastern Cape , Effluent quality -- Testing , Sewage disposal plants -- South Africa -- Eastern Cape , Escherichia coli
- Description: Water is an indispensible and yet a difficult resource to be renewed, thus water scarcity has become one of the major challenges faced worldwide, with the Southern regions of Africa being the most impacted and affected, especially the Eastern Cape Province of South Africa where rural communities depend on receiving waterbodies that are often negatively impacted by wastewater final effluents. This present study was conducted between August and December 2010 to assess the physicochemical and microbial qualities of the final effluents of peri-urban and rural communities based wastewater treatment plants in the Eastern Cape Province. The physicochemical parameters were determined on site and in the laboratory, while bacteriological qualities were determined using culture based techniques. The virological qualities were determined by molecular methods using reverse transcriptase polymerase chain reaction for the target RNA virus and the conventional polymerase chain reaction for the target DNA virus. For both wastewater treatment plants, the physicochemical parameters ranged as follows: chemical oxygen demand (5.95-45 mg/L); total dissolved solids (114.5-187.0 mg/L); salinity (0.12-0.20 psu); temperature (14.2-25.7oC); pH (6.0-7.6); nitrate and nitrites (1.55-6.7 mg/L and 0.023-1.15 mg/L respectively); biological oxygen demand (3.5-7.8 mg/L); turbidity (1.49-6.98 NTU); and chlorine residual (0-2.97 mg/L). Feacal indicator bacteria counts ranged as follows: feacal coliforms (0-1.25×104 cfu/100 ml); total coliforms (0-3.95×104 cfu/100 ml); and enterococci (0-5.0×103 cfu/100 ml). xviii Seventy five percent of the rural community based plant and 80 percent of the peri-urban community based plant were positive for coxsackie A virus, while hepatitis A virus was detected in all the rural community based plant 80 percent of the peri-urban community based plant. This study suggests the need for intervention by appropriate regulatory agencies to ensure regular monitoring of the qualities of final effluents of wastewater treatment facilities in the Eastern Cape Province and ensure compliance to established guidelines.
- Full Text:
- Date Issued: 2012
- Authors: Gusha, Siyabulela Stability
- Date: 2012
- Subjects: Water-supply, Rural -- Health aspects -- South Africa , Pathogenic microorganisms -- South Africa -- Eastern Cape , Water-supply, Rural -- South Africa -- Eastern Cape , Effluent quality -- Testing , Sewage disposal plants -- South Africa -- Eastern Cape , Escherichia coli
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11265 , http://hdl.handle.net/10353/489 , Water-supply, Rural -- Health aspects -- South Africa , Pathogenic microorganisms -- South Africa -- Eastern Cape , Water-supply, Rural -- South Africa -- Eastern Cape , Effluent quality -- Testing , Sewage disposal plants -- South Africa -- Eastern Cape , Escherichia coli
- Description: Water is an indispensible and yet a difficult resource to be renewed, thus water scarcity has become one of the major challenges faced worldwide, with the Southern regions of Africa being the most impacted and affected, especially the Eastern Cape Province of South Africa where rural communities depend on receiving waterbodies that are often negatively impacted by wastewater final effluents. This present study was conducted between August and December 2010 to assess the physicochemical and microbial qualities of the final effluents of peri-urban and rural communities based wastewater treatment plants in the Eastern Cape Province. The physicochemical parameters were determined on site and in the laboratory, while bacteriological qualities were determined using culture based techniques. The virological qualities were determined by molecular methods using reverse transcriptase polymerase chain reaction for the target RNA virus and the conventional polymerase chain reaction for the target DNA virus. For both wastewater treatment plants, the physicochemical parameters ranged as follows: chemical oxygen demand (5.95-45 mg/L); total dissolved solids (114.5-187.0 mg/L); salinity (0.12-0.20 psu); temperature (14.2-25.7oC); pH (6.0-7.6); nitrate and nitrites (1.55-6.7 mg/L and 0.023-1.15 mg/L respectively); biological oxygen demand (3.5-7.8 mg/L); turbidity (1.49-6.98 NTU); and chlorine residual (0-2.97 mg/L). Feacal indicator bacteria counts ranged as follows: feacal coliforms (0-1.25×104 cfu/100 ml); total coliforms (0-3.95×104 cfu/100 ml); and enterococci (0-5.0×103 cfu/100 ml). xviii Seventy five percent of the rural community based plant and 80 percent of the peri-urban community based plant were positive for coxsackie A virus, while hepatitis A virus was detected in all the rural community based plant 80 percent of the peri-urban community based plant. This study suggests the need for intervention by appropriate regulatory agencies to ensure regular monitoring of the qualities of final effluents of wastewater treatment facilities in the Eastern Cape Province and ensure compliance to established guidelines.
- Full Text:
- Date Issued: 2012
Professional women balancing work and motherhood : a study of coping strategies used in balancing this dual role
- Authors: Gunton, Andrea
- Date: 2012
- Subjects: Working mothers -- South Africa -- Grahamstown Work and family -- South Africa -- Grahamstown Role conflict Stress (Psychology) Working mothers -- Psychology
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3143 , http://hdl.handle.net/10962/d1007242
- Description: The aim of this qualitative research study is to develop insights into the dynamics involved in work- family conflict, balance and coping strategies. The study explores the experiences of seven professional women, who are also mothers, employed in professional work positions in Grahamstown. The research is interpretive in nature as it aims to explore the conflicts experienced by the professional mothers in balancing their competing roles. The study focused on the demands that these women face and the coping strategies that these working mothers develop and use, in order to balance their career aspirations as well as their family responsibilities. It set out to explore the women’s perceptions of work- family conflict and the extent to which they experience it, further examining the compromises that the women have had to make and possible feelings of guilt or regret that they may have experienced. The findings indicated that this balance is sensitive to many facilitating and hindering factors. The participants revealed that they experience work- family conflict, and that the experience of it has largely to do with the guilt of not spending enough time with their family. Another significant finding was that the women expressed their coping strategies as being organised; forming a line between work and family life as well as employing domestic workers. The women further stated that there are constant compromises that have to be made to fit in the multiple roles, and that feelings of guilt and/or regret do set in at times.
- Full Text:
- Date Issued: 2012
- Authors: Gunton, Andrea
- Date: 2012
- Subjects: Working mothers -- South Africa -- Grahamstown Work and family -- South Africa -- Grahamstown Role conflict Stress (Psychology) Working mothers -- Psychology
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3143 , http://hdl.handle.net/10962/d1007242
- Description: The aim of this qualitative research study is to develop insights into the dynamics involved in work- family conflict, balance and coping strategies. The study explores the experiences of seven professional women, who are also mothers, employed in professional work positions in Grahamstown. The research is interpretive in nature as it aims to explore the conflicts experienced by the professional mothers in balancing their competing roles. The study focused on the demands that these women face and the coping strategies that these working mothers develop and use, in order to balance their career aspirations as well as their family responsibilities. It set out to explore the women’s perceptions of work- family conflict and the extent to which they experience it, further examining the compromises that the women have had to make and possible feelings of guilt or regret that they may have experienced. The findings indicated that this balance is sensitive to many facilitating and hindering factors. The participants revealed that they experience work- family conflict, and that the experience of it has largely to do with the guilt of not spending enough time with their family. Another significant finding was that the women expressed their coping strategies as being organised; forming a line between work and family life as well as employing domestic workers. The women further stated that there are constant compromises that have to be made to fit in the multiple roles, and that feelings of guilt and/or regret do set in at times.
- Full Text:
- Date Issued: 2012
Propagation and stress physiology of selected Subtropical Thicket species : towards increasing biodiversity at rehabilitation sites
- Authors: Louw, Merika
- Date: 2012
- Subjects: Biodiversity conservation , Plant physiology , Stress (Physiology) , Plant propagation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10758 , http://hdl.handle.net/10948/d1021115
- Description: Sundays Thicket and Spekboomveld vegetation in the Eastern Cape have experienced intensive and extensive degradation due to over-browsing by domestic stock. The Subtropical Thicket Restoration Project aims to take advantage of the high carbon sequestration potential of Portulacaria afra (Spekboom) and other Thicket species, to rehabilitate degraded Thicket by restoring biodiversity and ecosystem services, create job opportunities and socio-economic upliftment in local communities, and promote the trade of carbon credits generated by planting and „farming‟ with Spekboom truncheons, rather than domestic stock. Plant material (seeds and length of stem) was sourced from the farm Krompoort, outside Uitenhage in the Eastern Cape. The effectiveness of four different rooting media i.e. plain pool filter sand and 1:1 mixtures of pool filter sand with perlite, potting soil and Thicket soil, on the rooting of ten Thicket species, were tested. Species with the greatest percentage strike and mean root length on stem cuttings were succulent species, Crassula ovata (84 percent strike) and Portulacaria afra (97 percent), as was expected. The application of rooting hormone Seradix© No. 3 did not significantly promote cutting strike or increase mean root length in C. ovata and P. afra. Woody canopy shrub species with the greatest cutting strike and mean root length, overall, were Rhigozum obovatum (24 percent), Lycium cinereum and L. oxycarpum (21 percent), and Searsia longispina (19 percent). These species, as well as Grewia robusta (4 percent), are considered „easy-to-root‟ species, or of sufficient functional value in terms of their spinescence, flower and fruit production, and soil-binding capabilities. Very low percentage strike (<1 percent) and mean root length were achieved in Azima tetracantha, Carissa bispinosa and Gymnosporia polyacantha subsp. polyacantha. These species are considered unsuitable for propagation for rehabilitation purposes. Crassula ovata, L. cinereum, L. oxycarpum, P. afra and S. longispina cuttings produced longer roots when planted in Thicket soil, the same having been found in R. obovatum cuttings planted in perlite. Thicket soil was, therefore, best at promoting cutting strike and root growth in „easy-to-root‟ species. Plain pool filter sand was the only medium in which A. tetracantha, C. bispinosa and G. robusta, cuttings rooted, and perlite the only medium in which G. polyacantha subsp. polyacantha cuttings rooted. Potting soil did not promote significant cutting strike or root growth in any of the species tested. Physiological variables i.e. photosynthetic efficiency (chlorophyll a fluorescence, Fv/Fm) and stomatal conductance (mmol H2O m-2 s-1) were measured for ten Thicket species, including Portulacaria afra. Control plants were watered well once a week, and treatment plants were dried out for 30 days, rewatered on the 30th day and their recovery from drought stress monitored for a further 17 days. Species that responded poorly to drought stress were Gymnosporia buxifolia and Putterlickia pyracantha. In addition to Portulacaria afra, species that showed the fastest recovery and resprout after rewatering, were: Crassula ovata, Ehretia rigida, Grewia robusta, Lycium ferocissimum, Rhigozum obovatum and Searsia longispina. These species produced the smallest decline in volumetric moisture content of soil, and had the lowest decline in photosynthetic efficiency and stomatal conductance during simulated drought. Unlike C. ovata and P. afra, which are CAM or C3-CAM switching species, mortality of transplants will most likely be high, if not total, during transplantation, as this study was done at lower light and temperature, and higher humidity levels than experienced at rehabilitation sites. This study has shown that the reintroduction of propagated woody canopy shrubs and trees into degraded Thicket sites does not appear to be a practical or economical method of actively restoring biodiversity to rehabilitation sites. As woody climax species have been shown to return to sites planted with Spekboom truncheons through „natural regeneration‟ within approximately 50 years, future research efforts should focus on optimising restoration site selection and planting techniques in order to maximize carbon sequestration potential of planted truncheons, which will, in the long term, result in an environment that can support regeneration of the biodiversity to something resembling intact Thicket.
- Full Text:
- Date Issued: 2012
- Authors: Louw, Merika
- Date: 2012
- Subjects: Biodiversity conservation , Plant physiology , Stress (Physiology) , Plant propagation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10758 , http://hdl.handle.net/10948/d1021115
- Description: Sundays Thicket and Spekboomveld vegetation in the Eastern Cape have experienced intensive and extensive degradation due to over-browsing by domestic stock. The Subtropical Thicket Restoration Project aims to take advantage of the high carbon sequestration potential of Portulacaria afra (Spekboom) and other Thicket species, to rehabilitate degraded Thicket by restoring biodiversity and ecosystem services, create job opportunities and socio-economic upliftment in local communities, and promote the trade of carbon credits generated by planting and „farming‟ with Spekboom truncheons, rather than domestic stock. Plant material (seeds and length of stem) was sourced from the farm Krompoort, outside Uitenhage in the Eastern Cape. The effectiveness of four different rooting media i.e. plain pool filter sand and 1:1 mixtures of pool filter sand with perlite, potting soil and Thicket soil, on the rooting of ten Thicket species, were tested. Species with the greatest percentage strike and mean root length on stem cuttings were succulent species, Crassula ovata (84 percent strike) and Portulacaria afra (97 percent), as was expected. The application of rooting hormone Seradix© No. 3 did not significantly promote cutting strike or increase mean root length in C. ovata and P. afra. Woody canopy shrub species with the greatest cutting strike and mean root length, overall, were Rhigozum obovatum (24 percent), Lycium cinereum and L. oxycarpum (21 percent), and Searsia longispina (19 percent). These species, as well as Grewia robusta (4 percent), are considered „easy-to-root‟ species, or of sufficient functional value in terms of their spinescence, flower and fruit production, and soil-binding capabilities. Very low percentage strike (<1 percent) and mean root length were achieved in Azima tetracantha, Carissa bispinosa and Gymnosporia polyacantha subsp. polyacantha. These species are considered unsuitable for propagation for rehabilitation purposes. Crassula ovata, L. cinereum, L. oxycarpum, P. afra and S. longispina cuttings produced longer roots when planted in Thicket soil, the same having been found in R. obovatum cuttings planted in perlite. Thicket soil was, therefore, best at promoting cutting strike and root growth in „easy-to-root‟ species. Plain pool filter sand was the only medium in which A. tetracantha, C. bispinosa and G. robusta, cuttings rooted, and perlite the only medium in which G. polyacantha subsp. polyacantha cuttings rooted. Potting soil did not promote significant cutting strike or root growth in any of the species tested. Physiological variables i.e. photosynthetic efficiency (chlorophyll a fluorescence, Fv/Fm) and stomatal conductance (mmol H2O m-2 s-1) were measured for ten Thicket species, including Portulacaria afra. Control plants were watered well once a week, and treatment plants were dried out for 30 days, rewatered on the 30th day and their recovery from drought stress monitored for a further 17 days. Species that responded poorly to drought stress were Gymnosporia buxifolia and Putterlickia pyracantha. In addition to Portulacaria afra, species that showed the fastest recovery and resprout after rewatering, were: Crassula ovata, Ehretia rigida, Grewia robusta, Lycium ferocissimum, Rhigozum obovatum and Searsia longispina. These species produced the smallest decline in volumetric moisture content of soil, and had the lowest decline in photosynthetic efficiency and stomatal conductance during simulated drought. Unlike C. ovata and P. afra, which are CAM or C3-CAM switching species, mortality of transplants will most likely be high, if not total, during transplantation, as this study was done at lower light and temperature, and higher humidity levels than experienced at rehabilitation sites. This study has shown that the reintroduction of propagated woody canopy shrubs and trees into degraded Thicket sites does not appear to be a practical or economical method of actively restoring biodiversity to rehabilitation sites. As woody climax species have been shown to return to sites planted with Spekboom truncheons through „natural regeneration‟ within approximately 50 years, future research efforts should focus on optimising restoration site selection and planting techniques in order to maximize carbon sequestration potential of planted truncheons, which will, in the long term, result in an environment that can support regeneration of the biodiversity to something resembling intact Thicket.
- Full Text:
- Date Issued: 2012
Providing basic conditions in vulnerable sectors
- Authors: Sahula, Unathi
- Date: 2012
- Subjects: South Africa. Basic Conditions of Employment Act , Labor laws and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10244 , http://hdl.handle.net/10948/d1019710
- Description: The relationship between workers and employers in South Africa is governed by various labour statutes such as the Basic Conditions of Employment Act (BCEA). The Basic Conditions of Employment Act regulates the working conditions of employees, including working hours, leave, particulars of employment and remuneration and termination of employment, etc. The purpose is to ensure that employees are not exploited and that they do not have to negotiate for these basic conditions of service. The BCEA does not prescribe the minimum remuneration that an employer must pay an employee, so the BCEA empowers the Minister of Labour to make sectoral determinations for sectors or areas of the economy that are typically in a weak bargaining position or not well organised by trade unions. Sectoral determinations are a means to protect vulnerable employees by fixing conditions of employment as well as minimum wages of employees that would otherwise have to be secured through collective bargaining. Employers and employees as well as their representatives are fully consulted during the process of making sectoral determinations. These consultations are held occasionally and the employers and employees can participate in the making of a sectoral determination that will regulate their employment relationship, either by making written submissions to the Department of Labour or by giving input at the public hearings that are usually held by the Department. The Minister is also advised in this regard by a body called Employment Conditions Commission (ECC), which is an independent statutory body established in terms of section 59(1) of the Basic Conditions of Employment Act. The Minister of Labour, after consultation with NEDLAC appoints the commissioners. The ECC’s mandate is a broad one, with its primary function being to advise the Minister of Labour on various matters concerning the BCEA. These include among others, the making of sectoral determinations, monitoring trends in collective bargaining for their possible impact on the BCEA. The issues highlighted above will be dealt with in detail in this paper.
- Full Text:
- Date Issued: 2012
- Authors: Sahula, Unathi
- Date: 2012
- Subjects: South Africa. Basic Conditions of Employment Act , Labor laws and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10244 , http://hdl.handle.net/10948/d1019710
- Description: The relationship between workers and employers in South Africa is governed by various labour statutes such as the Basic Conditions of Employment Act (BCEA). The Basic Conditions of Employment Act regulates the working conditions of employees, including working hours, leave, particulars of employment and remuneration and termination of employment, etc. The purpose is to ensure that employees are not exploited and that they do not have to negotiate for these basic conditions of service. The BCEA does not prescribe the minimum remuneration that an employer must pay an employee, so the BCEA empowers the Minister of Labour to make sectoral determinations for sectors or areas of the economy that are typically in a weak bargaining position or not well organised by trade unions. Sectoral determinations are a means to protect vulnerable employees by fixing conditions of employment as well as minimum wages of employees that would otherwise have to be secured through collective bargaining. Employers and employees as well as their representatives are fully consulted during the process of making sectoral determinations. These consultations are held occasionally and the employers and employees can participate in the making of a sectoral determination that will regulate their employment relationship, either by making written submissions to the Department of Labour or by giving input at the public hearings that are usually held by the Department. The Minister is also advised in this regard by a body called Employment Conditions Commission (ECC), which is an independent statutory body established in terms of section 59(1) of the Basic Conditions of Employment Act. The Minister of Labour, after consultation with NEDLAC appoints the commissioners. The ECC’s mandate is a broad one, with its primary function being to advise the Minister of Labour on various matters concerning the BCEA. These include among others, the making of sectoral determinations, monitoring trends in collective bargaining for their possible impact on the BCEA. The issues highlighted above will be dealt with in detail in this paper.
- Full Text:
- Date Issued: 2012
Public participation in integrated development planning, New Brighton, Nelson Mandela Bay Municipality : 2006-2010
- Authors: Mbewana, Stembiso Matthews
- Date: 2012
- Subjects: Local government -- South Africa -- Port Elizabeth -- Citizen participation , Local governement -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:8178 , http://hdl.handle.net/10948/1775 , Local government -- South Africa -- Port Elizabeth -- Citizen participation , Local governement -- South Africa -- Port Elizabeth
- Description: The most important difference between the new form of local government and that of the past is the creative and dynamic “developmental role” for local government to ensure maximum impact on poverty alleviation within resource constraints, and to address spatially entrenched socio‐economic inequalities. This needs to take place within the framework of integrated development planning, which is linked to the annual budgeting cycles. The IDP process is intended to provide communities with opportunities for participation in articulating, monitoring, reviewing and evaluating their needs. The aim of the research was to establish to what extent cooperation between the communities and the ward committees in the ward of New Brighton exists, with specific reference to consultation and participation in terms of IDP. A qualitative study was undertaken and literature review on public participation in terms of the IDP was conducted. Relevant secondary data was sourced and structured interviews were conducted with councillors representing New Brighton. Focus group interviews were also conducted with ward committee members from New Brighton. The research revealed that the priorities and genuine needs of the communities were often ignored by the Nelson Mandela Bay Municipality. There is no correlation between the genuine needs of the communities and those perceived to be the needs of the communities by the public officials. Challenges on public participation in IDP process were also found to be associated with the relationship between the councillors and public officials on what constitute the genuine needs of the communities.
- Full Text:
- Date Issued: 2012
- Authors: Mbewana, Stembiso Matthews
- Date: 2012
- Subjects: Local government -- South Africa -- Port Elizabeth -- Citizen participation , Local governement -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:8178 , http://hdl.handle.net/10948/1775 , Local government -- South Africa -- Port Elizabeth -- Citizen participation , Local governement -- South Africa -- Port Elizabeth
- Description: The most important difference between the new form of local government and that of the past is the creative and dynamic “developmental role” for local government to ensure maximum impact on poverty alleviation within resource constraints, and to address spatially entrenched socio‐economic inequalities. This needs to take place within the framework of integrated development planning, which is linked to the annual budgeting cycles. The IDP process is intended to provide communities with opportunities for participation in articulating, monitoring, reviewing and evaluating their needs. The aim of the research was to establish to what extent cooperation between the communities and the ward committees in the ward of New Brighton exists, with specific reference to consultation and participation in terms of IDP. A qualitative study was undertaken and literature review on public participation in terms of the IDP was conducted. Relevant secondary data was sourced and structured interviews were conducted with councillors representing New Brighton. Focus group interviews were also conducted with ward committee members from New Brighton. The research revealed that the priorities and genuine needs of the communities were often ignored by the Nelson Mandela Bay Municipality. There is no correlation between the genuine needs of the communities and those perceived to be the needs of the communities by the public officials. Challenges on public participation in IDP process were also found to be associated with the relationship between the councillors and public officials on what constitute the genuine needs of the communities.
- Full Text:
- Date Issued: 2012
Public participation in local government municipalities in South Africa between 2006 and 2011 : lessons from Hibiscus Coast Municipality
- Authors: Memela, Siyabonga Ezra
- Date: 2012
- Subjects: Local government -- South Africa -- Citizen participation , Economic development -- South Africa -- Citizen participation , Municipal government -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8284 , http://hdl.handle.net/10948/d1018176
- Description: There is an on-going debate in South Africa whether municipalities are an effective vehicle for deepening participatory democracy or not. Due to serious backlogs on services, the role of municipalities has largely been reduced to service delivery, to the detriment and total neglect of fundamental functions of local government. These are (Act 200, 1996):(a) To provide democratic and accountable government for local communities;(b) To ensure the provision of services to communities in a sustainable manner;(c) To promote social and economic development;(d) To promote a safe and healthy environment; and (e) To encourage the involvement of communities and community organisations in the matters of local government. On the other hand Haveri, Stenvall & Majoinen (2011) argue that if the municipalities are a government sphere closest to the people, they are therefore best placed to, and should, lead and support the deepening of participatory democracy, what they call self-government. As the debate rages on, there are indications that most of thechallenges that face the municipalities are related to the distance that has been developing between municipal institutions and the citizens.
- Full Text:
- Date Issued: 2012
- Authors: Memela, Siyabonga Ezra
- Date: 2012
- Subjects: Local government -- South Africa -- Citizen participation , Economic development -- South Africa -- Citizen participation , Municipal government -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8284 , http://hdl.handle.net/10948/d1018176
- Description: There is an on-going debate in South Africa whether municipalities are an effective vehicle for deepening participatory democracy or not. Due to serious backlogs on services, the role of municipalities has largely been reduced to service delivery, to the detriment and total neglect of fundamental functions of local government. These are (Act 200, 1996):(a) To provide democratic and accountable government for local communities;(b) To ensure the provision of services to communities in a sustainable manner;(c) To promote social and economic development;(d) To promote a safe and healthy environment; and (e) To encourage the involvement of communities and community organisations in the matters of local government. On the other hand Haveri, Stenvall & Majoinen (2011) argue that if the municipalities are a government sphere closest to the people, they are therefore best placed to, and should, lead and support the deepening of participatory democracy, what they call self-government. As the debate rages on, there are indications that most of thechallenges that face the municipalities are related to the distance that has been developing between municipal institutions and the citizens.
- Full Text:
- Date Issued: 2012
Quality of life in Grahamstown, East London and Mdantsane: preliminary result
- Helliker, Kirk D, Bekker, Simon, Lambie, Eileen
- Authors: Helliker, Kirk D , Bekker, Simon , Lambie, Eileen
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144756 , vital:38376 , DOI: 10.1080/02580144.1981.10428933
- Description: A quality of life survey amongst residents of three Eastern Cape towns, viz. Grahamstown, East London, and Mdantsane, shows that the attitudes to home and neighbourhood which urban residents in the Eastern Cape develop, are fashioned in large part by both the residential “group area” in which these urban dwellers live, and by their socio-economic status. White residents, overwhelmingly, are satisfied with their diets, their municipality, their homes. They feel safe in their homes and are satisfied that police protection is available if needed. For black residents fear of poverty and unemployment, of physical violence, and dissatisfaction with an inadequate diet is widespread. Indian and coloured urban residents who are generally perceived as minorities in Grahamstown and East London, occupy an intermediate position. Their residential areas are sited close to predominantly low income black residential areas. Higher income Indian and coloured households show lower rates of dissatisfaction with diet, housing, and municipal services than the black community.
- Full Text:
- Date Issued: 2012
- Authors: Helliker, Kirk D , Bekker, Simon , Lambie, Eileen
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144756 , vital:38376 , DOI: 10.1080/02580144.1981.10428933
- Description: A quality of life survey amongst residents of three Eastern Cape towns, viz. Grahamstown, East London, and Mdantsane, shows that the attitudes to home and neighbourhood which urban residents in the Eastern Cape develop, are fashioned in large part by both the residential “group area” in which these urban dwellers live, and by their socio-economic status. White residents, overwhelmingly, are satisfied with their diets, their municipality, their homes. They feel safe in their homes and are satisfied that police protection is available if needed. For black residents fear of poverty and unemployment, of physical violence, and dissatisfaction with an inadequate diet is widespread. Indian and coloured urban residents who are generally perceived as minorities in Grahamstown and East London, occupy an intermediate position. Their residential areas are sited close to predominantly low income black residential areas. Higher income Indian and coloured households show lower rates of dissatisfaction with diet, housing, and municipal services than the black community.
- Full Text:
- Date Issued: 2012
Quality of work and work life: understanding the work ethic of medical professionals in selected hospitals in the Eastern Cape region of South Africa
- Authors: Kwizera, Alice Stella
- Date: 2012
- Subjects: Hospitals -- Medical staff -- South Africa -- Eastern Cape Work ethic -- South Africa -- Eastern Cape Medical personnel -- Job satisfaction -- South Africa -- Eastern Cape Protestant work ethic
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3323 , http://hdl.handle.net/10962/d1003111
- Description: This thesis reports a study of work ethic values, beliefs and attitudes held by medical professionals in selected hospitals in the Eastern Cape, South Africa. The study was in response to the public outcry about the declining work ethic and poor service delivery in South Africa’s healthcare sector. Scholarly interest in the work ethic and its role in economic development dates back to Max Weber’s classical work, which was the starting point for my study. The German economic sociologist published his seminal essay on The Protestant Ethic and the Spirit of Capitalism in 1904/1905. Since that time, Weber’s ideas on the Protestant work ethic continue to inform and influence studies of the contemporary work ethic, which is thought to have become secularised. My study was informed by data collected in 2009 through a questionnaire survey and personal interviews. A total of 174 doctors and nurses, working in four urban, periurban and rural hospitals near East London, completed a self-administered questionnaire. The questionnaire replicated the Multi-Dimensional Work Ethic Profile (MWEP) developed by Miller, Woehr and Hudspeth in 2001/2002. The instrument examines seven critical dimensions of the work ethic, namely self-reliance, morality, (foregoing) leisure, hard work, centrality of work in life, not wasting time, and delay of gratification. In addition, I conducted personal interviews in the same four hospitals with 41 hospital managers, doctors, nurses, and patients to discuss their understanding of the work ethic and its practical application. The study found that both doctors’ and nurses’ overall work ethic scores on the MWEP scale were above average. Although there was no significant difference between the overall work ethic scores of the two professions, doctors scored significantly higher than nurses on the ‘hard work’ and ‘self reliance’ dimensions of the work ethic scale. In the qualitative study, the doctors’ work ethic was rated much more highly than the nurses’ by their superiors and patients; and the work ethic of nurses in the urban hospitals was rated much lower than that of their rural colleagues. In contradiction to the idea of the secularization of the contemporary work ethic, religiosity and religious beliefs were influential in the endorsement of work ethic principles. In line with the notion that ‘happy’ workers are more productive, job and life satisfaction were found to be strong correlates of the work ethic of medical professionals.
- Full Text:
- Date Issued: 2012
- Authors: Kwizera, Alice Stella
- Date: 2012
- Subjects: Hospitals -- Medical staff -- South Africa -- Eastern Cape Work ethic -- South Africa -- Eastern Cape Medical personnel -- Job satisfaction -- South Africa -- Eastern Cape Protestant work ethic
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3323 , http://hdl.handle.net/10962/d1003111
- Description: This thesis reports a study of work ethic values, beliefs and attitudes held by medical professionals in selected hospitals in the Eastern Cape, South Africa. The study was in response to the public outcry about the declining work ethic and poor service delivery in South Africa’s healthcare sector. Scholarly interest in the work ethic and its role in economic development dates back to Max Weber’s classical work, which was the starting point for my study. The German economic sociologist published his seminal essay on The Protestant Ethic and the Spirit of Capitalism in 1904/1905. Since that time, Weber’s ideas on the Protestant work ethic continue to inform and influence studies of the contemporary work ethic, which is thought to have become secularised. My study was informed by data collected in 2009 through a questionnaire survey and personal interviews. A total of 174 doctors and nurses, working in four urban, periurban and rural hospitals near East London, completed a self-administered questionnaire. The questionnaire replicated the Multi-Dimensional Work Ethic Profile (MWEP) developed by Miller, Woehr and Hudspeth in 2001/2002. The instrument examines seven critical dimensions of the work ethic, namely self-reliance, morality, (foregoing) leisure, hard work, centrality of work in life, not wasting time, and delay of gratification. In addition, I conducted personal interviews in the same four hospitals with 41 hospital managers, doctors, nurses, and patients to discuss their understanding of the work ethic and its practical application. The study found that both doctors’ and nurses’ overall work ethic scores on the MWEP scale were above average. Although there was no significant difference between the overall work ethic scores of the two professions, doctors scored significantly higher than nurses on the ‘hard work’ and ‘self reliance’ dimensions of the work ethic scale. In the qualitative study, the doctors’ work ethic was rated much more highly than the nurses’ by their superiors and patients; and the work ethic of nurses in the urban hospitals was rated much lower than that of their rural colleagues. In contradiction to the idea of the secularization of the contemporary work ethic, religiosity and religious beliefs were influential in the endorsement of work ethic principles. In line with the notion that ‘happy’ workers are more productive, job and life satisfaction were found to be strong correlates of the work ethic of medical professionals.
- Full Text:
- Date Issued: 2012
Quantification of the cross-sectoral impacts of waterweeds and their control in Ghana
- Authors: Akpabey, Felix Jerry
- Date: 2012
- Subjects: Water hyacinth -- Control -- Environmental aspects -- Ghana Alien plants -- Research -- Ghana Introduced organisms Economic development -- Social aspects -- Research -- Ghana
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5748 , http://hdl.handle.net/10962/d1005435
- Description: The Akosombo Dam on the Volta River in Ghana was built in 1963 to provide cheap energy to fuel industry and to accelerate the economic growth of the country. It provides hydroelectric power, enhanced fishing and water transportation upstream, and improved opportunities for irrigated farming, especially in the lower reaches, and their attendant economic multiplier effects. A few years after the construction of this major dam, a rapid expansion of industrialization took place in Ghana. This brought about an exponential increase in demand for more electrical power. This led to the construction of a smaller dam at Akuse, downstream of the Akosomho Dam in 1981 and the formation of a headpond at Kpong. The impoundment of the river at the two sites (Akosombo and Kpong) caused an alteration in the existing ecological and biophysical processes in the river basin, including a slowing of the flow of the river, upstream and downstream. Changes in the natural processes, such as a reduction in the flow of the river and an increase in nutrient status of the water, resulted in an invasion of aquatic weeds, increasing the density of aquatic snails (intermediate hosts of schistosomiasis), silting and closure of the estuary, as well as other more subtle effects. The invasion of the river's main course and the dams by aquatic plants led to a corresponding reduction of navigable water both upstream and downstream. The aim of this thesis was to quantify the impact and control of waterweeds, especially water hyacinth, Eichhornia crassipes (Mart) Solms-Laubach (Pontederiaceae), in Ghana. A floral survey on the Kpong Headpond recorded 49 emergent, 12 free floating and I submerged aquatic plant species, many of which were indigenous, but the exotic or introduced water hyacinth was recorded at most of the sampling sites, and was the most abundant and had the biggest impact on the utilization of the water resource. Mats of water hyacinth served as substrates for other, indigenous species to grow out into the main channel of the headpond, including the intake point of the Kpong head works of the Ghana Water Company Limited (GWCL) and landing sites for boats. These mats resulted in a reduction of the fish (fin and shell) harvest, reducing the annual production to far below demand. Water hyacinth was also shown to have severe health implications. A survey of the Ministry of Health records showed that the prevalence of both urinary and intestinal schistosomiasis had risen significantly over time as the abundance of waterweeds, most notably water hyacinth, increased, and ranged between 70% and 75% but up to 100% in some lakeside communities. Based on the work done by an NGO on board the medical boat ("Onipa Nua "), losses in terms of money due to the effect on health of the aquatic weed infestations on the Volta River in 2006 amounted to US$ 620,000. Economic losses due to invasive alien aquatic weeds were also calculated on the Oti River Arm of Lake Volta. It was estimated that about US$2.3 million per annum would be lost to the Volta Lake Transport Company and individual boat transport operators if this section of the river were 100% covered by aquatic weeds (water hyacinth and Salvinia molesta D.S. Mitchell (Salviniaceae)). It was also estimated that US$327,038 was spent annually in monitoring and managing the weeds in the Oti River. Control interventions for aquatic weeds have been implemented in river systems in Ghana. The biological control agents Neochetina bruchi Hustache (Coleoptera, Curculionidae) and Neochetina eichhorniae Warner (Coleoptera, Curculionidae) have been used on water hyacinth infestations in the Oti River Arm of Lake Volta, the Tano River and the Lagoon complex in the south-western part of the country. Cyrtobagous salviniae Calder and Sands (Coleoptera: Curculionidae) has been used to control salvinia, and Neohydronomous affinis Hustache (Coleoptera: Curculionidae) to control water lettuce, Pistia stratiotes Lilmaeus (Araceae) in the Tano River and Lagoon complex. Although these projects have been regarded as successful, they have relied on research from elsewhere in the world and no postrelease quantification has been conducted. In evaluating the impact of the biological control agents Neochetina bruchi and Neochetina eichhorniae weevils on water hyacinth infestations in the Tano River, fresh adult feeding scars were recorded as well as the numbers of adult weevils on each water hyacinth plant sampled at six sites. Despite being released in 1994, weevil numbers and resultant damage to plants in the Tano Lagoon was low in comparison to other regions of the world where these agents have been used. The main reason for this is that this lagoon floods seasonally, washing weevil-infested plants out to sea. Water hyacinth then re-infests the lagoon from seed and the weevil populations are low. To resolve this situation, two courses of action are proposed. The first is to mass rear the weevils along the shore of the lagoon and release them when the first seedlings recruit. The second proposal is that additional agents that have shorter lifecycies and are more mobile than the weevils should be released. To this end, the water hyacinth mirid, Eccritotarsus catarinensis (Carvalho) (Hemiptera: Miridae) was imported from South Africa and released onto the Tano Lagoon in 2009. Retrospective laboratory host specificity trials were conducted on Neachetina eichharniae and Neachetina bruchi weevils 15 years after their release into Ghana to see if any variation in their host ranges had occurred. Considerable damage was inflicted on the E. crassipes leaves by the Neachetina weevils, while little feeding damage was recorded on both Heteranthera callifalia Kunth. (Pontederiaceae) and Eichharnia natans (P.Beauv.) Solms (Pontederiaceae). All the weevils introduced on H callifalia and E. natans died after the first week. This study served to confirm the host specificity and thereby the safety of these agents. Invasive alien aquatic macrophytes have negative impacts on the environment and economy of Ghana. The control of these weeds is essential to socioeconomic development and improved human health standards in riparian communities. Biological control offers a safe and sustainable control option, but requires diligent implementation. However, aquatic weed invasion is more typically a result of the anthropogenically induced eutrophication of water bodies, and this is the main issue that has to be addressed.
- Full Text:
- Date Issued: 2012
- Authors: Akpabey, Felix Jerry
- Date: 2012
- Subjects: Water hyacinth -- Control -- Environmental aspects -- Ghana Alien plants -- Research -- Ghana Introduced organisms Economic development -- Social aspects -- Research -- Ghana
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5748 , http://hdl.handle.net/10962/d1005435
- Description: The Akosombo Dam on the Volta River in Ghana was built in 1963 to provide cheap energy to fuel industry and to accelerate the economic growth of the country. It provides hydroelectric power, enhanced fishing and water transportation upstream, and improved opportunities for irrigated farming, especially in the lower reaches, and their attendant economic multiplier effects. A few years after the construction of this major dam, a rapid expansion of industrialization took place in Ghana. This brought about an exponential increase in demand for more electrical power. This led to the construction of a smaller dam at Akuse, downstream of the Akosomho Dam in 1981 and the formation of a headpond at Kpong. The impoundment of the river at the two sites (Akosombo and Kpong) caused an alteration in the existing ecological and biophysical processes in the river basin, including a slowing of the flow of the river, upstream and downstream. Changes in the natural processes, such as a reduction in the flow of the river and an increase in nutrient status of the water, resulted in an invasion of aquatic weeds, increasing the density of aquatic snails (intermediate hosts of schistosomiasis), silting and closure of the estuary, as well as other more subtle effects. The invasion of the river's main course and the dams by aquatic plants led to a corresponding reduction of navigable water both upstream and downstream. The aim of this thesis was to quantify the impact and control of waterweeds, especially water hyacinth, Eichhornia crassipes (Mart) Solms-Laubach (Pontederiaceae), in Ghana. A floral survey on the Kpong Headpond recorded 49 emergent, 12 free floating and I submerged aquatic plant species, many of which were indigenous, but the exotic or introduced water hyacinth was recorded at most of the sampling sites, and was the most abundant and had the biggest impact on the utilization of the water resource. Mats of water hyacinth served as substrates for other, indigenous species to grow out into the main channel of the headpond, including the intake point of the Kpong head works of the Ghana Water Company Limited (GWCL) and landing sites for boats. These mats resulted in a reduction of the fish (fin and shell) harvest, reducing the annual production to far below demand. Water hyacinth was also shown to have severe health implications. A survey of the Ministry of Health records showed that the prevalence of both urinary and intestinal schistosomiasis had risen significantly over time as the abundance of waterweeds, most notably water hyacinth, increased, and ranged between 70% and 75% but up to 100% in some lakeside communities. Based on the work done by an NGO on board the medical boat ("Onipa Nua "), losses in terms of money due to the effect on health of the aquatic weed infestations on the Volta River in 2006 amounted to US$ 620,000. Economic losses due to invasive alien aquatic weeds were also calculated on the Oti River Arm of Lake Volta. It was estimated that about US$2.3 million per annum would be lost to the Volta Lake Transport Company and individual boat transport operators if this section of the river were 100% covered by aquatic weeds (water hyacinth and Salvinia molesta D.S. Mitchell (Salviniaceae)). It was also estimated that US$327,038 was spent annually in monitoring and managing the weeds in the Oti River. Control interventions for aquatic weeds have been implemented in river systems in Ghana. The biological control agents Neochetina bruchi Hustache (Coleoptera, Curculionidae) and Neochetina eichhorniae Warner (Coleoptera, Curculionidae) have been used on water hyacinth infestations in the Oti River Arm of Lake Volta, the Tano River and the Lagoon complex in the south-western part of the country. Cyrtobagous salviniae Calder and Sands (Coleoptera: Curculionidae) has been used to control salvinia, and Neohydronomous affinis Hustache (Coleoptera: Curculionidae) to control water lettuce, Pistia stratiotes Lilmaeus (Araceae) in the Tano River and Lagoon complex. Although these projects have been regarded as successful, they have relied on research from elsewhere in the world and no postrelease quantification has been conducted. In evaluating the impact of the biological control agents Neochetina bruchi and Neochetina eichhorniae weevils on water hyacinth infestations in the Tano River, fresh adult feeding scars were recorded as well as the numbers of adult weevils on each water hyacinth plant sampled at six sites. Despite being released in 1994, weevil numbers and resultant damage to plants in the Tano Lagoon was low in comparison to other regions of the world where these agents have been used. The main reason for this is that this lagoon floods seasonally, washing weevil-infested plants out to sea. Water hyacinth then re-infests the lagoon from seed and the weevil populations are low. To resolve this situation, two courses of action are proposed. The first is to mass rear the weevils along the shore of the lagoon and release them when the first seedlings recruit. The second proposal is that additional agents that have shorter lifecycies and are more mobile than the weevils should be released. To this end, the water hyacinth mirid, Eccritotarsus catarinensis (Carvalho) (Hemiptera: Miridae) was imported from South Africa and released onto the Tano Lagoon in 2009. Retrospective laboratory host specificity trials were conducted on Neachetina eichharniae and Neachetina bruchi weevils 15 years after their release into Ghana to see if any variation in their host ranges had occurred. Considerable damage was inflicted on the E. crassipes leaves by the Neachetina weevils, while little feeding damage was recorded on both Heteranthera callifalia Kunth. (Pontederiaceae) and Eichharnia natans (P.Beauv.) Solms (Pontederiaceae). All the weevils introduced on H callifalia and E. natans died after the first week. This study served to confirm the host specificity and thereby the safety of these agents. Invasive alien aquatic macrophytes have negative impacts on the environment and economy of Ghana. The control of these weeds is essential to socioeconomic development and improved human health standards in riparian communities. Biological control offers a safe and sustainable control option, but requires diligent implementation. However, aquatic weed invasion is more typically a result of the anthropogenically induced eutrophication of water bodies, and this is the main issue that has to be addressed.
- Full Text:
- Date Issued: 2012
Quantitative evaluation of starch determination in feed samples using Near Infra-red Reflectance
- Authors: Mapekula, Nwabisa Nolwazi
- Date: 2012
- Subjects: Near infrared spectroscopy , Animal feeding , Feeds -- Enzyme content
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10421 , http://hdl.handle.net/10948/d1015617
- Description: In an attempt to reduce the costs and turn around times experienced with outsourcing starch analysis in finished feed products, the company decided to invest in a NIR instrument to carry out such analyses in house. The particular instrument purchased by the company comes with a build in calibration for specific finished feed products and the main objective of this investigation was to evaluate whether the instrumentation and build in calibration gives reliable analyses of a finished poultry feed. The results obtained showed that : - The NIR results obtained have a positive bias compared to the theoretical (formulation specified value) and also to the value obtained by enzymatic starch analysis. - Despite the positive bias, the starch values were well within the allowable limits - Repeatability measurements on the data generated by two different analysts showed that while the percentage relative standard deviations obtained (< 1.0 percent) were well within the company specifications of percentage RSD < 5.0 percent, the inter sample repeatability showed small, but significant variation. - The results for intermediate precision showed that there is no statistically significant difference between the results obtained by two different analysts, nor was there any difference in the results of the same samples analysed at different time periods. - Reproducibility could not be evaluated due to the lack of another instrument within the company that were similarly set up as the instrument used for the investigation. This investigation has shown that, given the restrictions enforced by the build incalibration of the NIR instrument, the use of NIR for the analyses of the finished feed product is valid, but will require that careful attention be paid to data collection procedures.
- Full Text:
- Date Issued: 2012
- Authors: Mapekula, Nwabisa Nolwazi
- Date: 2012
- Subjects: Near infrared spectroscopy , Animal feeding , Feeds -- Enzyme content
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10421 , http://hdl.handle.net/10948/d1015617
- Description: In an attempt to reduce the costs and turn around times experienced with outsourcing starch analysis in finished feed products, the company decided to invest in a NIR instrument to carry out such analyses in house. The particular instrument purchased by the company comes with a build in calibration for specific finished feed products and the main objective of this investigation was to evaluate whether the instrumentation and build in calibration gives reliable analyses of a finished poultry feed. The results obtained showed that : - The NIR results obtained have a positive bias compared to the theoretical (formulation specified value) and also to the value obtained by enzymatic starch analysis. - Despite the positive bias, the starch values were well within the allowable limits - Repeatability measurements on the data generated by two different analysts showed that while the percentage relative standard deviations obtained (< 1.0 percent) were well within the company specifications of percentage RSD < 5.0 percent, the inter sample repeatability showed small, but significant variation. - The results for intermediate precision showed that there is no statistically significant difference between the results obtained by two different analysts, nor was there any difference in the results of the same samples analysed at different time periods. - Reproducibility could not be evaluated due to the lack of another instrument within the company that were similarly set up as the instrument used for the investigation. This investigation has shown that, given the restrictions enforced by the build incalibration of the NIR instrument, the use of NIR for the analyses of the finished feed product is valid, but will require that careful attention be paid to data collection procedures.
- Full Text:
- Date Issued: 2012
Quinones and halogenated monoterpenes of algal origin show anti-proliferative effects against breast cancer cells in vitro:
- de la Mare, Jo-Anne, Lawson, Jessica C, Chiwakata, Maynard T, Beukes, Denzil R, Blatch, Gregory L, Edkins, Adrienne L
- Authors: de la Mare, Jo-Anne , Lawson, Jessica C , Chiwakata, Maynard T , Beukes, Denzil R , Blatch, Gregory L , Edkins, Adrienne L
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/165165 , vital:41214 , DOI: 10.1007/s10637-011-9788-0
- Description: Red and brown algae have been shown to produce a variety of compounds with chemotherapeutic potential. A recent report described the isolation of a range of novel polyhalogenated monoterpene compounds from the red algae Plocamium corallorhiza and Plocamium cornutum collected off the coast of South Africa, together with the previously described tetraprenylquinone, sargaquinoic acid (SQA), from the brown algae Sargassum heterophyllum. In our study, the algal compounds were screened for anti-proliferative activity against metastatic MDA-MB-231 breast cancer cells revealing that a number of compounds displayed anti-cancer activity with IC50 values in the micromolar range. A subset of the compounds was tested for differential toxicity in the MCF-7/MCF12A system and five of these, including sargaquinoic acid, were found to be at least three times more toxic to the breast cancer than the non-malignant cell line.
- Full Text:
- Date Issued: 2012
- Authors: de la Mare, Jo-Anne , Lawson, Jessica C , Chiwakata, Maynard T , Beukes, Denzil R , Blatch, Gregory L , Edkins, Adrienne L
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/165165 , vital:41214 , DOI: 10.1007/s10637-011-9788-0
- Description: Red and brown algae have been shown to produce a variety of compounds with chemotherapeutic potential. A recent report described the isolation of a range of novel polyhalogenated monoterpene compounds from the red algae Plocamium corallorhiza and Plocamium cornutum collected off the coast of South Africa, together with the previously described tetraprenylquinone, sargaquinoic acid (SQA), from the brown algae Sargassum heterophyllum. In our study, the algal compounds were screened for anti-proliferative activity against metastatic MDA-MB-231 breast cancer cells revealing that a number of compounds displayed anti-cancer activity with IC50 values in the micromolar range. A subset of the compounds was tested for differential toxicity in the MCF-7/MCF12A system and five of these, including sargaquinoic acid, were found to be at least three times more toxic to the breast cancer than the non-malignant cell line.
- Full Text:
- Date Issued: 2012
Radical thinking in South Africa’s age of retreat
- Helliker, Kirk D, Vale, Peter C J
- Authors: Helliker, Kirk D , Vale, Peter C J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71214 , vital:29818 , https://doi.org/10.1177/0021909612442654
- Description: This article traces the rise and fall of radical praxis in South Africa and offers a critique of the prevailing practices of former Marxists under post-apartheid conditions. Western Marxism emerged in the 1970s in South Africa and Marxist activists became deeply involved in the liberation movements. With the unravelling of apartheid, the main liberation forces made a social pact with capitalist forces and former Marxists embraced a statist project. In the context of the rise of ‘new’ social movements, radical thinking of a more Libertarian kind is emerging in contemporary South Africa.
- Full Text: false
- Date Issued: 2012
- Authors: Helliker, Kirk D , Vale, Peter C J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71214 , vital:29818 , https://doi.org/10.1177/0021909612442654
- Description: This article traces the rise and fall of radical praxis in South Africa and offers a critique of the prevailing practices of former Marxists under post-apartheid conditions. Western Marxism emerged in the 1970s in South Africa and Marxist activists became deeply involved in the liberation movements. With the unravelling of apartheid, the main liberation forces made a social pact with capitalist forces and former Marxists embraced a statist project. In the context of the rise of ‘new’ social movements, radical thinking of a more Libertarian kind is emerging in contemporary South Africa.
- Full Text: false
- Date Issued: 2012