The economic contribution of the tourism accommodation sector in the Karoo
- Authors: Chandler, Biddy Lee
- Date: 2013-04-06
- Subjects: Hospitality industry South Africa Karoo , Karoo (South Africa) Economic conditions , Small cities South Africa Karoo , Tourism South Africa Karoo
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/366169 , vital:65838
- Description: Tourism is not only the world’s largest traded commodity in which many countries have gained economic advantage and stability, it is also a phenomenon of great economic and social significance. Tourism’s contribution, especially within developing countries and within emerging markets like South Africa, has become increasingly significant as it has created major economic growth and has highlighted areas of potential new sustainable development. The ultimate goal of achieving an increase in GDP and the creation of new employment opportunities is enhanced through the development of tourism. Considering the importance of the above and because the impact of tourism development in small towns is of significant economic benefit, research into this field is of value. This is the core of this study. As a result of tourism demand continually changing in small towns, mostly due to globalisation, demographic changes and agricultural changes, the need to continually update tourism data to ensure that tourism products remain highly rated is vital. This requires identifying tourists’ needs and supplying exactly what tourists demand. More specifically, evaluating tourist satisfaction and dissatisfaction will give accurate indications of a destination’s ability to satisfy its tourists, which is what will encourage repeat visits. The first objective of this dissertation was to qualitatively evaluate, through determining 27 product owners’ and 206 tourists’, opinions/perceptions of the tourism product offering in the Karoo. This study examined the accommodation sector of the tourism industry within 13 small towns in the Karoo. This is a fast growing and maturing industry. The study revealed that product owners and tourists expressed a positive attitude towards the growth of tourism in the Karoo, which they said was due to its heritage and authenticity, climate, desert tourism, natural beauty, ecotourism, remoteness, peace and quiet and acting as a refuge in an unspoilt natural environment. Amongst other recommendations, this result highlighted the importance of keeping closed the ‘gap’ between the expected product/level of service and the customer’s perception of the actual product/service received, by paying special attention to each of the identified tourist benefits. Most importantly, product owners, local tourism organisations (LTOs), municipalities, the government and all tourism stakeholders need to ensure that they work efficiently and effectively through transparent and collaborative relationships to ensure that they generate the highest possible returns from tourism investment through strategies that take cognizance of the above. The second objective of this dissertation was to quantitatively evaluate the economic impact of tourism through gathering and calculating 107 tourists’ spending data and 15 product owners’ expenditure data over a six month period between December 2010 and May 2011 in Graaff-Reinet. It was found that there was an increase over time in tourist spending, which led to an increase in direct income (net injection of visitor spending) and thus there was an increase in indirect income(affecting the level of product owners’ income)in the Graaff-Reinet economy. The key calculations in this study reflected a high multiplier of 1.2and a small amount of leakage (21%);and the final tourism economic impact of the accommodation sector in Graaff-Reinet wasR8940 982.00. This implies a positive economic contribution to this town. A focus on growing the tourist market is therefore a goal worth pursuing. This study provides up-to-date, statistically valid numerical/quantitative data as well as current qualitative data. However, gathering data for a longitudinal study would be highly beneficial to determine trends of how the tourism market in small towns is developing. This field has been given minimal attention, specifically within small towns. This dissertation was thus an attempt to initiate and motivate further ongoing efforts with regards to gathering, specifically economic, tourism data. Showing the positive economic contribution, and the multiple ripple effects that attracting tourists to an area can have, and the ultimate measurable economic benefit created through having a strong multiplier effect, will hopefully encourage all stakeholders to be confident and take the tourism industry more seriously. This highlights the need to recognise the economic impact potential of the tourism sector and to use the positive results identified in this study as a tool to lobby for tourism investment, which is unfortunately not reflected currently in many governmental programmes. Developing greater co-operation and co-ordination between the private and public sectors is needed: the most appropriate development model for the tourism industry being government led, private sector driven, community based and labour conscious in order for it to reap the benefits reflected in this tourism study. , Thesis (MEcon) -- Faculty of Commerce, Economics and Economic History, 2013
- Full Text:
- Date Issued: 2013-04-06
- Authors: Chandler, Biddy Lee
- Date: 2013-04-06
- Subjects: Hospitality industry South Africa Karoo , Karoo (South Africa) Economic conditions , Small cities South Africa Karoo , Tourism South Africa Karoo
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/366169 , vital:65838
- Description: Tourism is not only the world’s largest traded commodity in which many countries have gained economic advantage and stability, it is also a phenomenon of great economic and social significance. Tourism’s contribution, especially within developing countries and within emerging markets like South Africa, has become increasingly significant as it has created major economic growth and has highlighted areas of potential new sustainable development. The ultimate goal of achieving an increase in GDP and the creation of new employment opportunities is enhanced through the development of tourism. Considering the importance of the above and because the impact of tourism development in small towns is of significant economic benefit, research into this field is of value. This is the core of this study. As a result of tourism demand continually changing in small towns, mostly due to globalisation, demographic changes and agricultural changes, the need to continually update tourism data to ensure that tourism products remain highly rated is vital. This requires identifying tourists’ needs and supplying exactly what tourists demand. More specifically, evaluating tourist satisfaction and dissatisfaction will give accurate indications of a destination’s ability to satisfy its tourists, which is what will encourage repeat visits. The first objective of this dissertation was to qualitatively evaluate, through determining 27 product owners’ and 206 tourists’, opinions/perceptions of the tourism product offering in the Karoo. This study examined the accommodation sector of the tourism industry within 13 small towns in the Karoo. This is a fast growing and maturing industry. The study revealed that product owners and tourists expressed a positive attitude towards the growth of tourism in the Karoo, which they said was due to its heritage and authenticity, climate, desert tourism, natural beauty, ecotourism, remoteness, peace and quiet and acting as a refuge in an unspoilt natural environment. Amongst other recommendations, this result highlighted the importance of keeping closed the ‘gap’ between the expected product/level of service and the customer’s perception of the actual product/service received, by paying special attention to each of the identified tourist benefits. Most importantly, product owners, local tourism organisations (LTOs), municipalities, the government and all tourism stakeholders need to ensure that they work efficiently and effectively through transparent and collaborative relationships to ensure that they generate the highest possible returns from tourism investment through strategies that take cognizance of the above. The second objective of this dissertation was to quantitatively evaluate the economic impact of tourism through gathering and calculating 107 tourists’ spending data and 15 product owners’ expenditure data over a six month period between December 2010 and May 2011 in Graaff-Reinet. It was found that there was an increase over time in tourist spending, which led to an increase in direct income (net injection of visitor spending) and thus there was an increase in indirect income(affecting the level of product owners’ income)in the Graaff-Reinet economy. The key calculations in this study reflected a high multiplier of 1.2and a small amount of leakage (21%);and the final tourism economic impact of the accommodation sector in Graaff-Reinet wasR8940 982.00. This implies a positive economic contribution to this town. A focus on growing the tourist market is therefore a goal worth pursuing. This study provides up-to-date, statistically valid numerical/quantitative data as well as current qualitative data. However, gathering data for a longitudinal study would be highly beneficial to determine trends of how the tourism market in small towns is developing. This field has been given minimal attention, specifically within small towns. This dissertation was thus an attempt to initiate and motivate further ongoing efforts with regards to gathering, specifically economic, tourism data. Showing the positive economic contribution, and the multiple ripple effects that attracting tourists to an area can have, and the ultimate measurable economic benefit created through having a strong multiplier effect, will hopefully encourage all stakeholders to be confident and take the tourism industry more seriously. This highlights the need to recognise the economic impact potential of the tourism sector and to use the positive results identified in this study as a tool to lobby for tourism investment, which is unfortunately not reflected currently in many governmental programmes. Developing greater co-operation and co-ordination between the private and public sectors is needed: the most appropriate development model for the tourism industry being government led, private sector driven, community based and labour conscious in order for it to reap the benefits reflected in this tourism study. , Thesis (MEcon) -- Faculty of Commerce, Economics and Economic History, 2013
- Full Text:
- Date Issued: 2013-04-06
A study of the implementation of public policy to increase participation in recreation sports in Lagos state: Nigeria
- Setonji, Noel Adeoye https://orcid.org/0000-0002-2101-8037
- Authors: Setonji, Noel Adeoye https://orcid.org/0000-0002-2101-8037
- Date: 2013-04
- Subjects: Public administration
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24035 , vital:62301
- Description: The study investigated the extent to which implementation of the current public policy had improved recreation sport services and participation in Lagos metropolis of Lagos State-Nigeria. The study was delimited to 14 out of 16 Local Governments in Lagos metropolis. The study participants were 650 (334 males and 316 females) selected from 14 Local Governments in Lagos metropolis. Stratified random sampling technique was applied to get the volunteered metropolitan Lagos Local Government staff participants used for the study. Mixed research approaches involving quantitative and qualitative data collection were employed to carry out the study. Pilot study was carried out and reliability of each instrument was established with Cronbach’s alpha and test-re-test after an interval of two weeks. The reliability coefficients based on Pearson’s Product Moment Correlation were PRSPIQ (0.89), PRSPIBQ (0.87), RSFQ (0.79), and EPIMCEQ (0.85). The quantitative data collected were entered into Microsoft Excel 2007 Software and later exported to SPSS 18.0 statistical package for data analysis. Simple frequencies of responses in % and factor analysis were used in analysing the data collected, while Chi-square test of goodness-of-fit was used to test all the four hypotheses. The interview data collected were analysed using inductive method. All the hypotheses were pitched at 0.05 confidence level. Results of the study revealed that: implementation of the current public policy had not significantly improved recreation sport services and participation in Lagos metropolis: x2 (4, N = 650) = 395000, p<.0001, was significant at p<0.05); Barriers had affected effective implementation of the current public recreation sports policy in Lagos metropolis: x2 (4, N = 650) = 38.6000, p<.0001, was significant at p<0.05); implementation of the current public policy had not improved recreation sport facilities and safe recreation environments in Lagos metropolis: x2 (4, N = 650) = 33.3000, p<.0001, was significant at p<0.05; implementation of the current public policy had not effectively enhanced management competencies of recreation sport officers in Lagos metropolis: x2 (4, N = 650) = 64.3000, p<.0001, was significant at p<0.05. The conclusions drawn from the findings of the study include: the current public policy had not significantly improved recreation sport services in Lagos metropolis. Specifically, the study found that: the current policy had not done enough to enhance increased participation in recreation sport activities in Lagos metropolis; barriers had affected effective implementation of the current public recreation sports policy in Lagos metropolis; the public policy had not done enough to improve recreation sport facilities and safe recreation environments in most parts of Lagos metropolis; and the current public policy had not effectively enhanced management competencies of public recreation sport officers in Lagos metropolis. The study findings had it too that to effectively implement public recreation sports policy in Lagos metropolis, stakeholders should be adequately involved in the implementation activities. Based on the study findings, the study among others recommends that the State Government should be: proactive to update the content of the current public policy on recreation sports as the needs of the users are increasingly changing over time; Government agents, private organizations, recreation sport professionals and community stakeholders should be actively involved in the implementation processes to forestall any barriers; more recreation facility pools in safe and conducive environments should be provided and assessable to increase participation in recreation sports by the people of Lagos metropolis; and the public policy should be effectively implemented to enhance management competencies of public recreation sport managers in Lagos metropolis. , Thesis (PhD) -- Faculty of Management and Commerce, 2013
- Full Text:
- Date Issued: 2013-04
- Authors: Setonji, Noel Adeoye https://orcid.org/0000-0002-2101-8037
- Date: 2013-04
- Subjects: Public administration
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24035 , vital:62301
- Description: The study investigated the extent to which implementation of the current public policy had improved recreation sport services and participation in Lagos metropolis of Lagos State-Nigeria. The study was delimited to 14 out of 16 Local Governments in Lagos metropolis. The study participants were 650 (334 males and 316 females) selected from 14 Local Governments in Lagos metropolis. Stratified random sampling technique was applied to get the volunteered metropolitan Lagos Local Government staff participants used for the study. Mixed research approaches involving quantitative and qualitative data collection were employed to carry out the study. Pilot study was carried out and reliability of each instrument was established with Cronbach’s alpha and test-re-test after an interval of two weeks. The reliability coefficients based on Pearson’s Product Moment Correlation were PRSPIQ (0.89), PRSPIBQ (0.87), RSFQ (0.79), and EPIMCEQ (0.85). The quantitative data collected were entered into Microsoft Excel 2007 Software and later exported to SPSS 18.0 statistical package for data analysis. Simple frequencies of responses in % and factor analysis were used in analysing the data collected, while Chi-square test of goodness-of-fit was used to test all the four hypotheses. The interview data collected were analysed using inductive method. All the hypotheses were pitched at 0.05 confidence level. Results of the study revealed that: implementation of the current public policy had not significantly improved recreation sport services and participation in Lagos metropolis: x2 (4, N = 650) = 395000, p<.0001, was significant at p<0.05); Barriers had affected effective implementation of the current public recreation sports policy in Lagos metropolis: x2 (4, N = 650) = 38.6000, p<.0001, was significant at p<0.05); implementation of the current public policy had not improved recreation sport facilities and safe recreation environments in Lagos metropolis: x2 (4, N = 650) = 33.3000, p<.0001, was significant at p<0.05; implementation of the current public policy had not effectively enhanced management competencies of recreation sport officers in Lagos metropolis: x2 (4, N = 650) = 64.3000, p<.0001, was significant at p<0.05. The conclusions drawn from the findings of the study include: the current public policy had not significantly improved recreation sport services in Lagos metropolis. Specifically, the study found that: the current policy had not done enough to enhance increased participation in recreation sport activities in Lagos metropolis; barriers had affected effective implementation of the current public recreation sports policy in Lagos metropolis; the public policy had not done enough to improve recreation sport facilities and safe recreation environments in most parts of Lagos metropolis; and the current public policy had not effectively enhanced management competencies of public recreation sport officers in Lagos metropolis. The study findings had it too that to effectively implement public recreation sports policy in Lagos metropolis, stakeholders should be adequately involved in the implementation activities. Based on the study findings, the study among others recommends that the State Government should be: proactive to update the content of the current public policy on recreation sports as the needs of the users are increasingly changing over time; Government agents, private organizations, recreation sport professionals and community stakeholders should be actively involved in the implementation processes to forestall any barriers; more recreation facility pools in safe and conducive environments should be provided and assessable to increase participation in recreation sports by the people of Lagos metropolis; and the public policy should be effectively implemented to enhance management competencies of public recreation sport managers in Lagos metropolis. , Thesis (PhD) -- Faculty of Management and Commerce, 2013
- Full Text:
- Date Issued: 2013-04
Management of HIV/AIDS programmes at the workplace : A study of selected organisations in Chris Hani DISTRICT, Eastern Cape Province
- Authors: Shava, Gertrude
- Date: 2013-04
- Subjects: Social Responsibility of Business -- South Africa -- Eastern Cape , Industrial Hygiene -- South Africa -- Eastern Cape
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/23181 , vital:55712
- Description: The aim of the study was to investigate the management of HIV /AIDS programmes at the workplace in four selected organisations in Chris Hani District, Eastern Cape Province of South Africa. Four organisations were studied, two public organisations and two private organisations. With the use of triangulation method, two hundred employees were administered a semi- structured questionnaire while for (four) managers, semi structured in-depth interviews were conducted. The major findings of this study outline that all the four organisations studied have HIV/AIDS programmes and policies for their employees. However, there were no budget allocations for these programmes to be fully implemented for effectiveness. From the data, it can be concluded that HIV/AIDS has a negative impact on organisations‟ production like high training costs, high labour turnover and high absenteeism from work. This has been as a result of managers who did not put their total commitment towards HIV/AIDS management at their workplaces in the same way they have done to other core areas of businesses of their organisations. The study therefore recommends the management of these organisations to demonstrate a clear commitment to the HIV/AIDS management strategies by fully implementing the HIV/AIDS management programmes in their workplaces. It is very crucial for employees to see this commitment in a concrete form through non-discrimination and support for the people living with HIV/AIDS. Clear unambiguous commitment will go far in developing mutual trust between employers and employees and facilitate an atmosphere where people are willing to undergo VCT and to possibly disclose their status. Furthermore, managers are recommended to hire quality service providers to carry out intensive de-stigmatisation processes. This will create a supportive environment and adequately address the fears of employees about HIV/AIDS issues at the workplace. All these recommendations will go a long way in assisting organisations achieve their strategic business objectives and reduce the negative impact of HIV/AIDS at their workplaces. , Thesis (MA) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2013-04
- Authors: Shava, Gertrude
- Date: 2013-04
- Subjects: Social Responsibility of Business -- South Africa -- Eastern Cape , Industrial Hygiene -- South Africa -- Eastern Cape
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/23181 , vital:55712
- Description: The aim of the study was to investigate the management of HIV /AIDS programmes at the workplace in four selected organisations in Chris Hani District, Eastern Cape Province of South Africa. Four organisations were studied, two public organisations and two private organisations. With the use of triangulation method, two hundred employees were administered a semi- structured questionnaire while for (four) managers, semi structured in-depth interviews were conducted. The major findings of this study outline that all the four organisations studied have HIV/AIDS programmes and policies for their employees. However, there were no budget allocations for these programmes to be fully implemented for effectiveness. From the data, it can be concluded that HIV/AIDS has a negative impact on organisations‟ production like high training costs, high labour turnover and high absenteeism from work. This has been as a result of managers who did not put their total commitment towards HIV/AIDS management at their workplaces in the same way they have done to other core areas of businesses of their organisations. The study therefore recommends the management of these organisations to demonstrate a clear commitment to the HIV/AIDS management strategies by fully implementing the HIV/AIDS management programmes in their workplaces. It is very crucial for employees to see this commitment in a concrete form through non-discrimination and support for the people living with HIV/AIDS. Clear unambiguous commitment will go far in developing mutual trust between employers and employees and facilitate an atmosphere where people are willing to undergo VCT and to possibly disclose their status. Furthermore, managers are recommended to hire quality service providers to carry out intensive de-stigmatisation processes. This will create a supportive environment and adequately address the fears of employees about HIV/AIDS issues at the workplace. All these recommendations will go a long way in assisting organisations achieve their strategic business objectives and reduce the negative impact of HIV/AIDS at their workplaces. , Thesis (MA) -- Faculty of Social Sciences and Humanities, 2021
- Full Text:
- Date Issued: 2013-04
Management of HIV/AIDS programmes at the workplace: a study of selected organisations in Chris Hani District, Eastern Cape Province
- Authors: Shava, Getrude
- Date: 2013-04
- Subjects: HIV infections
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/24834 , vital:63601
- Description: The aim of the study was to investigate the management of HIV /AIDS programmes at the workplace in four selected organisations in Chris Hani District, Eastern Cape Province of South Africa. Four organisations were studied, two public organisations and two private organisations. With the use of triangulation method, two hundred employees were administered a semi- structured questionnaire while for (four) managers, semi structured in-depth interviews were conducted. The major findings of this study outline that all the four organisations studied have HIV/AIDS programmes and policies for their employees. However, there were no budget allocations for these programmes to be fully implemented for effectiveness. From the data, it can be concluded that HIV/AIDS has a negative impact on organisations‟ production like high training costs, high labour turnover and high absenteeism from work. This has been as a result of managers who did not put their total commitment towards HIV/AIDS management at their workplaces in the same way they have done to other core areas of businesses of their organisations. The study therefore recommends the management of these organisations to demonstrate a clear commitment to the HIV/AIDS management strategies by fully implementing the HIV/AIDS management programmes in their workplaces. It is very crucial for employees to see this commitment in a concrete form through non-discrimination and support for the people living with HIV/AIDS. Clear unambiguous commitment will go far in developing mutual trust between employers and employees and facilitate an atmosphere where people are willing to undergo VCT and to possibly disclose their status. Furthermore, managers are recommended to hire quality service providers to carry out intensive de-stigmatisation processes. This will create a supportive environment and adequately address the fears of employees about HIV/AIDS issues at the workplace. All these recommendations will go a long way in assisting organisations achieve their strategic business objectives and reduce the negative impact of HIV/AIDS at their workplaces. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2013
- Full Text:
- Date Issued: 2013-04
- Authors: Shava, Getrude
- Date: 2013-04
- Subjects: HIV infections
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/24834 , vital:63601
- Description: The aim of the study was to investigate the management of HIV /AIDS programmes at the workplace in four selected organisations in Chris Hani District, Eastern Cape Province of South Africa. Four organisations were studied, two public organisations and two private organisations. With the use of triangulation method, two hundred employees were administered a semi- structured questionnaire while for (four) managers, semi structured in-depth interviews were conducted. The major findings of this study outline that all the four organisations studied have HIV/AIDS programmes and policies for their employees. However, there were no budget allocations for these programmes to be fully implemented for effectiveness. From the data, it can be concluded that HIV/AIDS has a negative impact on organisations‟ production like high training costs, high labour turnover and high absenteeism from work. This has been as a result of managers who did not put their total commitment towards HIV/AIDS management at their workplaces in the same way they have done to other core areas of businesses of their organisations. The study therefore recommends the management of these organisations to demonstrate a clear commitment to the HIV/AIDS management strategies by fully implementing the HIV/AIDS management programmes in their workplaces. It is very crucial for employees to see this commitment in a concrete form through non-discrimination and support for the people living with HIV/AIDS. Clear unambiguous commitment will go far in developing mutual trust between employers and employees and facilitate an atmosphere where people are willing to undergo VCT and to possibly disclose their status. Furthermore, managers are recommended to hire quality service providers to carry out intensive de-stigmatisation processes. This will create a supportive environment and adequately address the fears of employees about HIV/AIDS issues at the workplace. All these recommendations will go a long way in assisting organisations achieve their strategic business objectives and reduce the negative impact of HIV/AIDS at their workplaces. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2013
- Full Text:
- Date Issued: 2013-04
The perceptions of the Reconstruction and Development Programme (RDP) Housing beneficiaries in South Africa on the extent to which the project meet their Housing needs. : The case of Golf Course Estate in Alice Town, Eastern Cape Province.
- Mamomano, Tatenda (https://orcid.org/0000-0002-8245-4537)
- Authors: Mamomano, Tatenda (https://orcid.org/0000-0002-8245-4537)
- Date: 2013-04
- Subjects: Economic assistance -- South Africa -- Eastern Cape , Poverty -- Government Policy -- Eastern Cape , Economic Development Projects
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26241 , vital:65002
- Description: The aim of this study was to explore the perceptions of RDP beneficiaries on the extent to which the RDP housing project meets their housing needs in South Africa through a case study of Golf Course Estate in Alice Town with the following specific objectives; to assess the extent to which the Alice Golf Course housing project has achieved the RDP programme objectives; to establish beneficiaries‟ perceptions on the extent the RDP Alice Golf Course houses meet their needs; and to explore the level of satisfaction on the RDP houses by beneficiaries. This study utilized triangulation of both quantitative and qualitative methodologies with qualitative as the dominant approach while quantitative was less dominant. The qualitative design took the form of a case study while the quantitative took the form of mini survey. The study sampled 72 participants from the study population. The study utilized an interview guide and a questionnaire as instruments of data collection. The findings indicated that the gender representation of the beneficiaries was skewed. This is because there were more females heading the houses than males; unemployment was also high; most participants were unmarried and most were adults. This study also discovered that most people residing in these houses are not the real owners who were allocated the houses. There were qualitative problems associated with the components of these houses such as poor roofing, doors, windows, floors and walls. Service delivery complaints were based on inadequate access to clean water, small size and spacing of the RDP house. Security was also a challenge because all the houses did not have street lights and the roads were very bad. Though it is commendable that drainage and sewer facilities are available, but they are not serving their purpose since there is no water in these houses. The findings also indicated that there were discrepancies in allocation of the houses; pervasiveness of social ills; inadequate consultative meetings between the RDP Administrator or social worker and the beneficiaries; as well as the pervasiveness of HIV/AIDS among other issues. This researcher recommended that the government needs to promote economic empowerment to deal with unemployment; to improve the quality of the material building the houses; improvement on service delivery gaps; to beef up infrastructure; renovation and revamping of current houses; to establish commissions of inquiry to deal with corruption; to honour and monitor waiting lists. Partnership with other stakeholders was also critical, in addressing access to social services and helps deal with social ills and run behaviour modification campaigns. This researcher also recommended that there is a need to carry out further research on the role played by the municipalities in the RDP housing project as well as conducting a purely qualitative research to further explore the perceptions of other stakeholders, NGOs, traditional leaders, church leaders, and police on the implementation of the housing project. This researcher advises that such a research could be carried out through focus group discussions and also since this study was bound by a case study it is also necessary for similar research to be carried out in different places in South Africa. , Thesis (MA) -- Faculty Social Sciences and Humanities, 2013
- Full Text:
- Date Issued: 2013-04
- Authors: Mamomano, Tatenda (https://orcid.org/0000-0002-8245-4537)
- Date: 2013-04
- Subjects: Economic assistance -- South Africa -- Eastern Cape , Poverty -- Government Policy -- Eastern Cape , Economic Development Projects
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26241 , vital:65002
- Description: The aim of this study was to explore the perceptions of RDP beneficiaries on the extent to which the RDP housing project meets their housing needs in South Africa through a case study of Golf Course Estate in Alice Town with the following specific objectives; to assess the extent to which the Alice Golf Course housing project has achieved the RDP programme objectives; to establish beneficiaries‟ perceptions on the extent the RDP Alice Golf Course houses meet their needs; and to explore the level of satisfaction on the RDP houses by beneficiaries. This study utilized triangulation of both quantitative and qualitative methodologies with qualitative as the dominant approach while quantitative was less dominant. The qualitative design took the form of a case study while the quantitative took the form of mini survey. The study sampled 72 participants from the study population. The study utilized an interview guide and a questionnaire as instruments of data collection. The findings indicated that the gender representation of the beneficiaries was skewed. This is because there were more females heading the houses than males; unemployment was also high; most participants were unmarried and most were adults. This study also discovered that most people residing in these houses are not the real owners who were allocated the houses. There were qualitative problems associated with the components of these houses such as poor roofing, doors, windows, floors and walls. Service delivery complaints were based on inadequate access to clean water, small size and spacing of the RDP house. Security was also a challenge because all the houses did not have street lights and the roads were very bad. Though it is commendable that drainage and sewer facilities are available, but they are not serving their purpose since there is no water in these houses. The findings also indicated that there were discrepancies in allocation of the houses; pervasiveness of social ills; inadequate consultative meetings between the RDP Administrator or social worker and the beneficiaries; as well as the pervasiveness of HIV/AIDS among other issues. This researcher recommended that the government needs to promote economic empowerment to deal with unemployment; to improve the quality of the material building the houses; improvement on service delivery gaps; to beef up infrastructure; renovation and revamping of current houses; to establish commissions of inquiry to deal with corruption; to honour and monitor waiting lists. Partnership with other stakeholders was also critical, in addressing access to social services and helps deal with social ills and run behaviour modification campaigns. This researcher also recommended that there is a need to carry out further research on the role played by the municipalities in the RDP housing project as well as conducting a purely qualitative research to further explore the perceptions of other stakeholders, NGOs, traditional leaders, church leaders, and police on the implementation of the housing project. This researcher advises that such a research could be carried out through focus group discussions and also since this study was bound by a case study it is also necessary for similar research to be carried out in different places in South Africa. , Thesis (MA) -- Faculty Social Sciences and Humanities, 2013
- Full Text:
- Date Issued: 2013-04
Assessment of the water quality, incidence of enteric viruses and microbial risk in the Buffalo River in the Eastern Cape Province of South Africa
- Chigor, Vincent Nnamdigadi https://orcid.org/0000-0002-0811-4526
- Authors: Chigor, Vincent Nnamdigadi https://orcid.org/0000-0002-0811-4526
- Date: 2013-03
- Subjects: Water quality , Water -- Microbiology
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24272 , vital:62596
- Description: Buffalo River is an important water resource in the Eastern Cape Province of South Africa. Over a 1-year period (August 2010–July 2011), the water quality and incidence of human enteric viruses (HEntVs) was assessed, using standard methods and molecular techniques and a total 72 composite water samples collected monthly from a total of 6 sites located on the river and three dams along its course. The sites were selected based on a number of factors including geographical location, anthropogenic activity/major water use, rural/urban status and access. A total of 13 physicochemical parameters were determined using the standard methods. The counts of faecal indicator bacteria (FIB) including total coliforms (TC), faecal coliforms (FC) and enterococci (ENT) were determined by the membrane filtration technique. HEntVs were concentrated using an adsorption-elution method based on cation (Al3+)-coated membrane filter. Real-time quantitative polymerase chain reaction (qPCR) was used for the detection and quantification of human adenoviruses (HAdV), and real-time reverse transcriptase-PCR (RT-qPCR) was used for the quantitative detection of hepatitis A virus (HAV), human rotaviruses (RoV) and enteroviruses (EnV). The detected HAdV were characterized by multiplex conventional/semi-nested PCR methods. The risks for human health constituted by exposure to the detected HEntVs at the six sites were evaluated by a static quantitative microbial risk assessment (QMRA) using both the exponential and beta-Poisson models. Water temperature ranged from 11 to 28oC, while pH varied from 6.6 to 10.7, and turbidity from 1.7 to 133 NTU. Electrical conductivity (EC), total dissolved solids (TDS) and salinity showed drastic variations (42.3-46693 μS/cm, 20.3–23350 mg/L and 0.02–33.8 PSU respectively). The concentrations of other parameters ranged as follows: chloride (3.7–168 mg/L); DO (6.9–11.1); BOD (0.6–9.4); COD (3.7–45.9); nitrite-nitrogen (0.02–0.21); nitrate-nitrogen (1–4.47); and orthophosphate (0.01–1.72). TC, FC and ENT counts were high and ranged from 1.9 × 102–3.8 × 107 cfu/100 mL, 0–3.0×105 cfu/100 mL and 0–5.3 × 105 cfu/100 mL for TC, FC and ENT respectively. Significantly (P<0.05) higher concentrations of FC and ENT were observed at the sampling sites located at the lower reaches of the river compared to the upper reaches. The FIB counts mostly exceeded the maximum limits recommended by national and international guidelines for safe fresh produce irrigation, domestic applications, full-contact recreation and livestock watering. Significant (P<0.01) positive correlations existed between TDS and salinity (r=0.921), between turbidity and each of TC (r=0.552) and FC (r=0.425), as well as between BOD and each of TC (r=0.282), FC (r=0.472) and ENT (r=0.552). Phosphate correlated positively with FC (r=0.424), and nitrate also with the same, FC (r=0.460). A strong positive correlation existed between FC and ENT (r=0.915). There existed a significant (P˂0.01) inverse correlation between enteric viruses and each of water temperature (r=-0.191) and pH (r=-0.234). No correlation could be deduced between enteric viruses and all the tested chemical and bacteriological parameters. HAV, HAdV, RoV and EnV were detected in 43.1percent, 34.7percent, 13.9percent and 9.7percent respectively of the total 72 water samples tested. Two or more viruses were detected in 22.2 percent of the samples. HAdV were detected at 5 of the 6 sampling sites with concentrations ranging from 1.2×101 genome copies (GC)/litre to 4.71×103 GC/litre. Epidemiologically important serotypes, Ad40/41 constituted 83.3percent, while Ad21 made up 16.7percent of all the HAdV detected. HAV was detected at all the sites in significantly (p < 0.05) varying concentrations that ranged from 1.5 × 101–1.9 × 105 GC/litre compared to RoV and EnV. Neither of RoV nor EnV was detected at any of the dams. The detected concentrations at the non-dam sites ranged from 2.5 × 101–2.1 × 103 GC/litre and 1.3 × 101–8.6 × 101 GC/litre for RoV and EnV respectively. The values for the estimated daily risks of enteric virus infection varied with sites and exposure scenario, and ranged from 7.31×10-3–1 (for HAdV), 4.23×10-2–6.54×10-1 (RoV), 2.32×10-4–1.73×10-1 (HAV) and 1.32×10-4–5.70×10-2 (EnV). The yearly risks of infection in individuals exposed to the river/dam water via drinking, recreational, domestic or irrigational activities were unacceptably high, exceeding the acceptable yearly risk of 0.01percent (10-4 infection/person/year) recommended by the USEPA for drinking water. The risks of illness and of death from infection ranged from 6.58×10-5–5.0×10-1 and 6.58×10-9–5.0×10-5 respectively. Data on the physicochemical and bacteriological parameters showed that the Buffalo River water quality was poor, and deteriorated in the plains compared to the upper reaches. These water quality data, the presence of enteric viruses and the QMRA data, that revealed unacceptably high risks of enteric virus infections, and of illness and mortality from the infections, show that the Buffalo River and its dams are contaminated waters that constitute significant public health hazards. Provision of adequate sanitary infrastructure will help prevent source water contamination, and public health education aimed at improving personal, household and community hygiene is imperative. Monitoring enteric viruses in rivers and source water dams is necessary and useful as a risk assessment tool for the exposed population. Future research should consider a comprehensive characterization of the detected viruses. This work is both a significant contribution to the molecular epidemiology of enteric viruses and the first report on molecular detection and quantification of enteric viruses in surface waters in the Eastern Cape. , Thesis (PhD) -- Faculty of Science and Agriculture, 2013
- Full Text:
- Date Issued: 2013-03
- Authors: Chigor, Vincent Nnamdigadi https://orcid.org/0000-0002-0811-4526
- Date: 2013-03
- Subjects: Water quality , Water -- Microbiology
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24272 , vital:62596
- Description: Buffalo River is an important water resource in the Eastern Cape Province of South Africa. Over a 1-year period (August 2010–July 2011), the water quality and incidence of human enteric viruses (HEntVs) was assessed, using standard methods and molecular techniques and a total 72 composite water samples collected monthly from a total of 6 sites located on the river and three dams along its course. The sites were selected based on a number of factors including geographical location, anthropogenic activity/major water use, rural/urban status and access. A total of 13 physicochemical parameters were determined using the standard methods. The counts of faecal indicator bacteria (FIB) including total coliforms (TC), faecal coliforms (FC) and enterococci (ENT) were determined by the membrane filtration technique. HEntVs were concentrated using an adsorption-elution method based on cation (Al3+)-coated membrane filter. Real-time quantitative polymerase chain reaction (qPCR) was used for the detection and quantification of human adenoviruses (HAdV), and real-time reverse transcriptase-PCR (RT-qPCR) was used for the quantitative detection of hepatitis A virus (HAV), human rotaviruses (RoV) and enteroviruses (EnV). The detected HAdV were characterized by multiplex conventional/semi-nested PCR methods. The risks for human health constituted by exposure to the detected HEntVs at the six sites were evaluated by a static quantitative microbial risk assessment (QMRA) using both the exponential and beta-Poisson models. Water temperature ranged from 11 to 28oC, while pH varied from 6.6 to 10.7, and turbidity from 1.7 to 133 NTU. Electrical conductivity (EC), total dissolved solids (TDS) and salinity showed drastic variations (42.3-46693 μS/cm, 20.3–23350 mg/L and 0.02–33.8 PSU respectively). The concentrations of other parameters ranged as follows: chloride (3.7–168 mg/L); DO (6.9–11.1); BOD (0.6–9.4); COD (3.7–45.9); nitrite-nitrogen (0.02–0.21); nitrate-nitrogen (1–4.47); and orthophosphate (0.01–1.72). TC, FC and ENT counts were high and ranged from 1.9 × 102–3.8 × 107 cfu/100 mL, 0–3.0×105 cfu/100 mL and 0–5.3 × 105 cfu/100 mL for TC, FC and ENT respectively. Significantly (P<0.05) higher concentrations of FC and ENT were observed at the sampling sites located at the lower reaches of the river compared to the upper reaches. The FIB counts mostly exceeded the maximum limits recommended by national and international guidelines for safe fresh produce irrigation, domestic applications, full-contact recreation and livestock watering. Significant (P<0.01) positive correlations existed between TDS and salinity (r=0.921), between turbidity and each of TC (r=0.552) and FC (r=0.425), as well as between BOD and each of TC (r=0.282), FC (r=0.472) and ENT (r=0.552). Phosphate correlated positively with FC (r=0.424), and nitrate also with the same, FC (r=0.460). A strong positive correlation existed between FC and ENT (r=0.915). There existed a significant (P˂0.01) inverse correlation between enteric viruses and each of water temperature (r=-0.191) and pH (r=-0.234). No correlation could be deduced between enteric viruses and all the tested chemical and bacteriological parameters. HAV, HAdV, RoV and EnV were detected in 43.1percent, 34.7percent, 13.9percent and 9.7percent respectively of the total 72 water samples tested. Two or more viruses were detected in 22.2 percent of the samples. HAdV were detected at 5 of the 6 sampling sites with concentrations ranging from 1.2×101 genome copies (GC)/litre to 4.71×103 GC/litre. Epidemiologically important serotypes, Ad40/41 constituted 83.3percent, while Ad21 made up 16.7percent of all the HAdV detected. HAV was detected at all the sites in significantly (p < 0.05) varying concentrations that ranged from 1.5 × 101–1.9 × 105 GC/litre compared to RoV and EnV. Neither of RoV nor EnV was detected at any of the dams. The detected concentrations at the non-dam sites ranged from 2.5 × 101–2.1 × 103 GC/litre and 1.3 × 101–8.6 × 101 GC/litre for RoV and EnV respectively. The values for the estimated daily risks of enteric virus infection varied with sites and exposure scenario, and ranged from 7.31×10-3–1 (for HAdV), 4.23×10-2–6.54×10-1 (RoV), 2.32×10-4–1.73×10-1 (HAV) and 1.32×10-4–5.70×10-2 (EnV). The yearly risks of infection in individuals exposed to the river/dam water via drinking, recreational, domestic or irrigational activities were unacceptably high, exceeding the acceptable yearly risk of 0.01percent (10-4 infection/person/year) recommended by the USEPA for drinking water. The risks of illness and of death from infection ranged from 6.58×10-5–5.0×10-1 and 6.58×10-9–5.0×10-5 respectively. Data on the physicochemical and bacteriological parameters showed that the Buffalo River water quality was poor, and deteriorated in the plains compared to the upper reaches. These water quality data, the presence of enteric viruses and the QMRA data, that revealed unacceptably high risks of enteric virus infections, and of illness and mortality from the infections, show that the Buffalo River and its dams are contaminated waters that constitute significant public health hazards. Provision of adequate sanitary infrastructure will help prevent source water contamination, and public health education aimed at improving personal, household and community hygiene is imperative. Monitoring enteric viruses in rivers and source water dams is necessary and useful as a risk assessment tool for the exposed population. Future research should consider a comprehensive characterization of the detected viruses. This work is both a significant contribution to the molecular epidemiology of enteric viruses and the first report on molecular detection and quantification of enteric viruses in surface waters in the Eastern Cape. , Thesis (PhD) -- Faculty of Science and Agriculture, 2013
- Full Text:
- Date Issued: 2013-03
The auto/biography of the liberation struggle and public representation of its memory and heritage :1994 to 2008
- Solani, Noel Lungile Zwelidumile
- Authors: Solani, Noel Lungile Zwelidumile
- Date: 2013-03
- Subjects: Monuments , Reconciliation - - Political aspects -- South Africa , Museums
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/23067 , vital:55380
- Description: This thesis is an analysis ofthe constructions and productions of new post apartheid identities and heritages of the liberation struggle with a specific reference on the Eastern Cape. It does this by examining the first 15 years ofdemocratic rule in South Africa. While there were many organisations that participated in the liberation struggle such as the African Peoples Organisation (APO). the lndian Congresses. the Pan Africanist Congress (PAC). Unity Movement as well as the African National Congress (ANC). the focus ofthis thesis is restricted to the ANC. In this case it examines what were the objectives and subjective reasons for the participation ofthe ANC in the liberation struggle. These questions are examined from the perspective ofthe ANC as one of the liberation movements that ultimately assumed power and had an opportunity to implement its vision and programmes in a new state. ln this way. this work shows that the objectives ofthe liberation struggle were aimed at replacing the apartheid racial order with a non-racial and non—sexist society where all its members are equal citizens. The thesis seeks to examine the feelings ofthe liberation struggle by looking at songs, poetry. photographs. documentary films. museums and monuments. I argue that, cultural practices and memory institutions such as museums. offers us useful complex methodologies in the narration ofthe auto/biography ofthe liberation struggle. I also argue that each of these does not only tell the narrative of the liberation struggle, trigger and promote the memory ofthat struggle and individuals within that struggle. but they also communicate the feelings ofthis struggle. its growth and maturity in ways that history as understood in the academy cannot The main question that is asked in this study is: what were the self—determined objectives ofthe National Democratic Struggle (NDS)? In this regard, I therefore examine two issues: first I look at the evolution ofthe national or native question in South Africa and the reaction or understanding ofthe liberation movements. especially the ANC. towards the national question. The thesis also examines the AN(“s attitude on this matter. Secondl). I attempt to analyse the “national question“ in a changed environment and the ways in which it is constructed through public memory and the means used for the "nation“ to where While not engaging on the merits or demerits of the national question. , Thesis (PhD) -- Faculty of Social Science and Humanities, 2013
- Full Text:
- Date Issued: 2013-03
- Authors: Solani, Noel Lungile Zwelidumile
- Date: 2013-03
- Subjects: Monuments , Reconciliation - - Political aspects -- South Africa , Museums
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/23067 , vital:55380
- Description: This thesis is an analysis ofthe constructions and productions of new post apartheid identities and heritages of the liberation struggle with a specific reference on the Eastern Cape. It does this by examining the first 15 years ofdemocratic rule in South Africa. While there were many organisations that participated in the liberation struggle such as the African Peoples Organisation (APO). the lndian Congresses. the Pan Africanist Congress (PAC). Unity Movement as well as the African National Congress (ANC). the focus ofthis thesis is restricted to the ANC. In this case it examines what were the objectives and subjective reasons for the participation ofthe ANC in the liberation struggle. These questions are examined from the perspective ofthe ANC as one of the liberation movements that ultimately assumed power and had an opportunity to implement its vision and programmes in a new state. ln this way. this work shows that the objectives ofthe liberation struggle were aimed at replacing the apartheid racial order with a non-racial and non—sexist society where all its members are equal citizens. The thesis seeks to examine the feelings ofthe liberation struggle by looking at songs, poetry. photographs. documentary films. museums and monuments. I argue that, cultural practices and memory institutions such as museums. offers us useful complex methodologies in the narration ofthe auto/biography ofthe liberation struggle. I also argue that each of these does not only tell the narrative of the liberation struggle, trigger and promote the memory ofthat struggle and individuals within that struggle. but they also communicate the feelings ofthis struggle. its growth and maturity in ways that history as understood in the academy cannot The main question that is asked in this study is: what were the self—determined objectives ofthe National Democratic Struggle (NDS)? In this regard, I therefore examine two issues: first I look at the evolution ofthe national or native question in South Africa and the reaction or understanding ofthe liberation movements. especially the ANC. towards the national question. The thesis also examines the AN(“s attitude on this matter. Secondl). I attempt to analyse the “national question“ in a changed environment and the ways in which it is constructed through public memory and the means used for the "nation“ to where While not engaging on the merits or demerits of the national question. , Thesis (PhD) -- Faculty of Social Science and Humanities, 2013
- Full Text:
- Date Issued: 2013-03
The changing face of NEPAD and the challenges of facilitating sub-regional economic integration on the ECOWAS platform
- Authors: Agomuonso, Udo Robertson
- Date: 2013-03
- Subjects: New Partnership for Africa's Development , Economic Community of West African States , Sustainable development -- Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24783 , vital:63573
- Description: This research is intended to evaluate and study the challenges confronting NEPAD’s quest for sub regional economic integration in the ECOWAS domain. Political and economic integration has been part of African strategy to overcome fragmentation, marginalization and improve the continent’s position in the global political economy. Indeed, Africa needs integration more than any other continent or region in the world and this is why, it has had a fair share of regional integration arrangements all through her history. Unfortunately, these efforts have not paid off in the dimension of desired expectations. When NEPAD was established, it was given regional integration responsibilities, even though it was not a regional organization. It was mandated to drive regional integration in Africa by supporting the regional integration efforts of the regional economic institutions in Africa. After 10 years of existence, African leaders dissolved NEPAD and in its place, instituted the NEPAD Planning and Coordinating Agency (NPCA). This move was orchestrated by the seemingly slow progress made by NEPAD in this direction. NEPAD and ECOWAS has been working together to promote regional integration, but like in most parts of Africa, the challenges has been seemingly intractable. The study is anchored around the principles of integration as presented by the neo-functionalists theorists. Hence, the research attempted to provide an explanation of the performance and non-performance of NEPAD as a regional integration tool, within the confines of the theory. The findings show that while, there has been some level of success in this venture as evidenced by the projects that are on-going in the sub region, the fact remains that NEPAD did not deliver or actually delivered below expectations. However, this situation is reversible as the study submitted that, there is a future for regional integration in West Africa, Africa and the new NPCA, if the African Union pulls the right levers. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2013
- Full Text:
- Date Issued: 2013-03
- Authors: Agomuonso, Udo Robertson
- Date: 2013-03
- Subjects: New Partnership for Africa's Development , Economic Community of West African States , Sustainable development -- Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24783 , vital:63573
- Description: This research is intended to evaluate and study the challenges confronting NEPAD’s quest for sub regional economic integration in the ECOWAS domain. Political and economic integration has been part of African strategy to overcome fragmentation, marginalization and improve the continent’s position in the global political economy. Indeed, Africa needs integration more than any other continent or region in the world and this is why, it has had a fair share of regional integration arrangements all through her history. Unfortunately, these efforts have not paid off in the dimension of desired expectations. When NEPAD was established, it was given regional integration responsibilities, even though it was not a regional organization. It was mandated to drive regional integration in Africa by supporting the regional integration efforts of the regional economic institutions in Africa. After 10 years of existence, African leaders dissolved NEPAD and in its place, instituted the NEPAD Planning and Coordinating Agency (NPCA). This move was orchestrated by the seemingly slow progress made by NEPAD in this direction. NEPAD and ECOWAS has been working together to promote regional integration, but like in most parts of Africa, the challenges has been seemingly intractable. The study is anchored around the principles of integration as presented by the neo-functionalists theorists. Hence, the research attempted to provide an explanation of the performance and non-performance of NEPAD as a regional integration tool, within the confines of the theory. The findings show that while, there has been some level of success in this venture as evidenced by the projects that are on-going in the sub region, the fact remains that NEPAD did not deliver or actually delivered below expectations. However, this situation is reversible as the study submitted that, there is a future for regional integration in West Africa, Africa and the new NPCA, if the African Union pulls the right levers. , Thesis (PhD) -- Faculty of Social Sciences and Humanities, 2013
- Full Text:
- Date Issued: 2013-03
1H NMR-based kinetic-mechanistic study of the intramolecular trans-esterification of 2-exo-3-exo-dihydroxybornane monoacrylate esters
- Duggan, Andrew R, Mciteka, Lulama P, Lobb, Kevin A, Kaye, Perry T
- Authors: Duggan, Andrew R , Mciteka, Lulama P , Lobb, Kevin A , Kaye, Perry T
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/448871 , vital:74767 , xlink:href="https://hdl.handle.net/10520/EJC135616"
- Description: A 1H NMR study of the acid-catalyzed, intramolecular trans-esterification between isomeric 2-exo-3-exo-dihydroxybornane monoacrylate esters has afforded insights into the reaction mechanism and permitted the determination of kinetic and thermodynamic parameters for the pseudo-first-order processes.
- Full Text:
- Date Issued: 2013
- Authors: Duggan, Andrew R , Mciteka, Lulama P , Lobb, Kevin A , Kaye, Perry T
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/448871 , vital:74767 , xlink:href="https://hdl.handle.net/10520/EJC135616"
- Description: A 1H NMR study of the acid-catalyzed, intramolecular trans-esterification between isomeric 2-exo-3-exo-dihydroxybornane monoacrylate esters has afforded insights into the reaction mechanism and permitted the determination of kinetic and thermodynamic parameters for the pseudo-first-order processes.
- Full Text:
- Date Issued: 2013
A capability approach: Its potential for transformative education research focusing on education for sustainable development and gender issues in science teacher education
- Authors: Chikunda, Charles
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/387120 , vital:68208 , xlink:href="https://www.ajol.info/index.php/sajee/article/view/122266"
- Description: In this article, I use the capability approach to explore the role that the science, mathematics and technical subjects (SMTs) teacher education curriculum can play as a ‘gender conversion factor’. This comes amidst evidence that a major hindrance to the participation of girls in these disciplines is a lack of gender responsiveness in the pedagogy applied in schools. Seven teacher educators, who were purposively sampled at a Technical Teachers’ College in Zimbabwe, were the research participants. I adopted a case study design in which I used in-depth interviews, focus-group discussions and document analysis to generate data. Data was analysed deductively using predetermined themes based on an analytical tool anchored on Sen’s two, but quite distinct, aspects of freedom, that is, the opportunity aspect and the process aspect of freedom. The findings reveal that there is a limited awareness of gender issues among teacher educators, and that these issues are not being transformed into curriculum practice. All in all, it is evident that curriculum practices of SMTs teacher educators are riddled with gender blindness and so trainee teachers graduate from college without the necessary agency to deal with personal, social and environmental conversion factors that can play a role in girls converting the curriculum into functionings (beings and doings) and wider freedoms and valued beings and doings (capabilities).
- Full Text:
- Date Issued: 2013
- Authors: Chikunda, Charles
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/387120 , vital:68208 , xlink:href="https://www.ajol.info/index.php/sajee/article/view/122266"
- Description: In this article, I use the capability approach to explore the role that the science, mathematics and technical subjects (SMTs) teacher education curriculum can play as a ‘gender conversion factor’. This comes amidst evidence that a major hindrance to the participation of girls in these disciplines is a lack of gender responsiveness in the pedagogy applied in schools. Seven teacher educators, who were purposively sampled at a Technical Teachers’ College in Zimbabwe, were the research participants. I adopted a case study design in which I used in-depth interviews, focus-group discussions and document analysis to generate data. Data was analysed deductively using predetermined themes based on an analytical tool anchored on Sen’s two, but quite distinct, aspects of freedom, that is, the opportunity aspect and the process aspect of freedom. The findings reveal that there is a limited awareness of gender issues among teacher educators, and that these issues are not being transformed into curriculum practice. All in all, it is evident that curriculum practices of SMTs teacher educators are riddled with gender blindness and so trainee teachers graduate from college without the necessary agency to deal with personal, social and environmental conversion factors that can play a role in girls converting the curriculum into functionings (beings and doings) and wider freedoms and valued beings and doings (capabilities).
- Full Text:
- Date Issued: 2013
A study of the photophysicochemical and antimicrobial properties of two zinc phthalocyanine–silver nanoparticle conjugates
- Rapulenyane, Nomasonto, Antunes, Edith M, Nyokong, Tebello
- Authors: Rapulenyane, Nomasonto , Antunes, Edith M , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/232522 , vital:49999 , xlink:href="https://doi.org/10.1039/C3NJ41107A"
- Description: This work reports conjugation of two mono carboxy substituted zinc phthalocyanines with glutathione capped silver nanoparticles (GSH-AgNPs). The photophysicochemical behaviour of the novel phthalocyanines–silver nanoparticle conjugates was investigated together with simple mixtures of the silver nanoparticles with low symmetry phthalocyanines (i.e. with no direct chemical bond formation). It was observed that upon conjugation of the phthalocyanines to the silver nanoparticles, a blue shifting of the Q band was induced. The triplet lifetimes and quantum yields improved upon conjugation as compared to the phthalocyanines alone. Fluorescence lifetimes and quantum yields decreased for conjugates compared to the phthalocyanines alone due to quenching caused by the silver nanoparticles. The low symmetry phthalocyanines and their conjugates showed antimicrobial activity against Escherichia coli in the presence and absence of light.
- Full Text:
- Date Issued: 2013
- Authors: Rapulenyane, Nomasonto , Antunes, Edith M , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/232522 , vital:49999 , xlink:href="https://doi.org/10.1039/C3NJ41107A"
- Description: This work reports conjugation of two mono carboxy substituted zinc phthalocyanines with glutathione capped silver nanoparticles (GSH-AgNPs). The photophysicochemical behaviour of the novel phthalocyanines–silver nanoparticle conjugates was investigated together with simple mixtures of the silver nanoparticles with low symmetry phthalocyanines (i.e. with no direct chemical bond formation). It was observed that upon conjugation of the phthalocyanines to the silver nanoparticles, a blue shifting of the Q band was induced. The triplet lifetimes and quantum yields improved upon conjugation as compared to the phthalocyanines alone. Fluorescence lifetimes and quantum yields decreased for conjugates compared to the phthalocyanines alone due to quenching caused by the silver nanoparticles. The low symmetry phthalocyanines and their conjugates showed antimicrobial activity against Escherichia coli in the presence and absence of light.
- Full Text:
- Date Issued: 2013
Adsorption and separation of platinum and palladium by polyamine functionalized polystyrene-based beads and nanofibers
- Fayemi, Omolola E, Ogunlaja, Adeniyi S, Kempgens, Pierre F M, Antunes, Edith M, Torto, Nelson, Nyokong, Tebello, Tshentu, Zenixole R
- Authors: Fayemi, Omolola E , Ogunlaja, Adeniyi S , Kempgens, Pierre F M , Antunes, Edith M , Torto, Nelson , Nyokong, Tebello , Tshentu, Zenixole R
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241694 , vital:50961 , xlink:href="https://doi.org/10.1016/j.mineng.2013.06.006"
- Description: Adsorption and separation of platinum and palladium chlorido species (PtCl62- and PdCl42-) on polystyrene beads as well as nanofibers functionalized with ammonium centres based on ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetetramine (TETA) and tris-(2-aminoethyl)amine (TAEA) are described. The functionalized sorbent materials were characterized by microanalysis, SEM, XPS, BET and FTIR. The surface area of the functionalized fibers was in the range 69–241 m2/g while it was 73–107 m2/g for the beads. The adsorption and loading capacities of the sorption materials were investigated using both the batch and column studies at 1 M HCl concentration. The adsorption studies for both PtCl62- and PdCl42- on the different sorbent materials fit the Langmuir isotherm with R2 values >0.99. The highest loading capacity of Pt and Pd were 7.4 mg/g and 4.3 mg/g respectively for the nanofiber sorbent material based on ethylenediamine (EDA) while the beads with ethylenediamine (EDA) gave 1.0 mg/g and 0.2 mg/g for Pt and Pd respectively. Metals loaded on the sorbent materials were recovered by using 3% m/v thiourea solution as the eluting agent with quantitative desorption efficiency under the selected experimental conditions. Separation of platinum from palladium was partially achieved by selective stripping of PtCl62- with 0.5 M of NaClO4 in 1.0 M HCl while PdCl42- was eluted with 0.5 M thiourea in 1.0 M HCl. Separation of platinum from iridium and rhodium under 1 M HCl concentration was successful on triethylenetriamine (TETA)-functionalized Merrifield beads. This material (M-TETA) showed selectivity for platinum albeit the low loading capacity.
- Full Text:
- Date Issued: 2013
- Authors: Fayemi, Omolola E , Ogunlaja, Adeniyi S , Kempgens, Pierre F M , Antunes, Edith M , Torto, Nelson , Nyokong, Tebello , Tshentu, Zenixole R
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241694 , vital:50961 , xlink:href="https://doi.org/10.1016/j.mineng.2013.06.006"
- Description: Adsorption and separation of platinum and palladium chlorido species (PtCl62- and PdCl42-) on polystyrene beads as well as nanofibers functionalized with ammonium centres based on ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetetramine (TETA) and tris-(2-aminoethyl)amine (TAEA) are described. The functionalized sorbent materials were characterized by microanalysis, SEM, XPS, BET and FTIR. The surface area of the functionalized fibers was in the range 69–241 m2/g while it was 73–107 m2/g for the beads. The adsorption and loading capacities of the sorption materials were investigated using both the batch and column studies at 1 M HCl concentration. The adsorption studies for both PtCl62- and PdCl42- on the different sorbent materials fit the Langmuir isotherm with R2 values >0.99. The highest loading capacity of Pt and Pd were 7.4 mg/g and 4.3 mg/g respectively for the nanofiber sorbent material based on ethylenediamine (EDA) while the beads with ethylenediamine (EDA) gave 1.0 mg/g and 0.2 mg/g for Pt and Pd respectively. Metals loaded on the sorbent materials were recovered by using 3% m/v thiourea solution as the eluting agent with quantitative desorption efficiency under the selected experimental conditions. Separation of platinum from palladium was partially achieved by selective stripping of PtCl62- with 0.5 M of NaClO4 in 1.0 M HCl while PdCl42- was eluted with 0.5 M thiourea in 1.0 M HCl. Separation of platinum from iridium and rhodium under 1 M HCl concentration was successful on triethylenetriamine (TETA)-functionalized Merrifield beads. This material (M-TETA) showed selectivity for platinum albeit the low loading capacity.
- Full Text:
- Date Issued: 2013
An exploratory study of the impacts of climate variability on food production availability and access in Chivi district 6, Zimbabwe
- Authors: Gwindi, Raphael
- Date: 2013
- Subjects: Climatic changes , Food security , Agricultural development projects
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26696 , vital:65852
- Description: The impacts of climate variability have been of global concern for many years. These impacts are affecting economic, social, cultural, agricultural, health and political structures in different countries. Although the impacts of climate variability on agricultural production are being experienced globally, it is generally accepted that developing countries are the worst affected due to a variety of reasons. Given the high susceptibility of developing countries to climate variability, this study maps and analyses the impacts of climate variability on agricultural production, food production, availability and access in Chivi District, Zimbabwe. The study aimed at finding out experiences, so it used a qualitative approach. The study uses in-depth and focus group discussions to collect data. Chivi district is experiencing erratic weather patterns which are impacting agricultural production in general and food production in particular. Consequently, food availability and access is on the decline in the district. Even though smallholder farmers have devised coping and adaptation strategies, this is not sufficient to help them fully deal with the impacts of climate variability. This is due to their limited assets, inadequate technology and climate information among other things. In an attempt to assist these smallholder farmers cope and adapt to the impacts of climate variability, NGOs and Government Departments have instituted a number of community interventions. This assistance includes agricultural extension services, farming input support and provision of climate change information and a lot of other things. In view of these findings, the study recommends the universal adoption and growing of small grain drought resistant crops in climate variability affected Chivi. It further recommends that farmers adopt conservation agriculture, get into partnerships and co-operatives to practice irrigation gardening where those without water sources provide equipment, labour and knowledge. The study also recommends that more climate science research be conducted in Zimbabwe by both NGOs and Government Departments. Furthermore, government and NGOs should provide more support for farmers in the form of climate change related training, knowledge and technology transfer among other things. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2013
- Full Text:
- Date Issued: 2013
- Authors: Gwindi, Raphael
- Date: 2013
- Subjects: Climatic changes , Food security , Agricultural development projects
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26696 , vital:65852
- Description: The impacts of climate variability have been of global concern for many years. These impacts are affecting economic, social, cultural, agricultural, health and political structures in different countries. Although the impacts of climate variability on agricultural production are being experienced globally, it is generally accepted that developing countries are the worst affected due to a variety of reasons. Given the high susceptibility of developing countries to climate variability, this study maps and analyses the impacts of climate variability on agricultural production, food production, availability and access in Chivi District, Zimbabwe. The study aimed at finding out experiences, so it used a qualitative approach. The study uses in-depth and focus group discussions to collect data. Chivi district is experiencing erratic weather patterns which are impacting agricultural production in general and food production in particular. Consequently, food availability and access is on the decline in the district. Even though smallholder farmers have devised coping and adaptation strategies, this is not sufficient to help them fully deal with the impacts of climate variability. This is due to their limited assets, inadequate technology and climate information among other things. In an attempt to assist these smallholder farmers cope and adapt to the impacts of climate variability, NGOs and Government Departments have instituted a number of community interventions. This assistance includes agricultural extension services, farming input support and provision of climate change information and a lot of other things. In view of these findings, the study recommends the universal adoption and growing of small grain drought resistant crops in climate variability affected Chivi. It further recommends that farmers adopt conservation agriculture, get into partnerships and co-operatives to practice irrigation gardening where those without water sources provide equipment, labour and knowledge. The study also recommends that more climate science research be conducted in Zimbabwe by both NGOs and Government Departments. Furthermore, government and NGOs should provide more support for farmers in the form of climate change related training, knowledge and technology transfer among other things. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2013
- Full Text:
- Date Issued: 2013
Applying a student curriculum discourse in higher education teaching and learning
- Mndzebele, Samuel, McKenna, Sioux
- Authors: Mndzebele, Samuel , McKenna, Sioux
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/187417 , vital:44633 , xlink:href="https://doi.org/10.1080/18146627.2013.786210"
- Description: Indications of poor quality in students’ written work necessitated the need for deeper investigations aimed at designing and applying appropriate teaching/learning and assessment innovations in the course curriculum. The project-exercise engaged a conceptual-explorative approach through: reviews/investigations; educational diagnosis; design/application of innovations and evaluation processes. In addition to other challenges, diagnosed problems included: students’ ignorance on key curriculum components; imbalance in teaching/learning and assessment tasks engaging all 3-learning domains; less intensiveness of the e-learning mode; and superficial formative feedback. Included a “Student-Curriculum-Discourse” self-tutorial guide, and tasks alignment of the teaching/learning and assessment. Learners’ performance can be improved through a curriculum-discourse self-tutorial exercise, complemented with: intellectual, social, experiential, and emotional structures. Both educators and learners share specific responsibilities in the teaching/learning environment. There is need to expand/probe the theoretical dimension within which the on-line distance education occurs.
- Full Text:
- Date Issued: 2013
- Authors: Mndzebele, Samuel , McKenna, Sioux
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/187417 , vital:44633 , xlink:href="https://doi.org/10.1080/18146627.2013.786210"
- Description: Indications of poor quality in students’ written work necessitated the need for deeper investigations aimed at designing and applying appropriate teaching/learning and assessment innovations in the course curriculum. The project-exercise engaged a conceptual-explorative approach through: reviews/investigations; educational diagnosis; design/application of innovations and evaluation processes. In addition to other challenges, diagnosed problems included: students’ ignorance on key curriculum components; imbalance in teaching/learning and assessment tasks engaging all 3-learning domains; less intensiveness of the e-learning mode; and superficial formative feedback. Included a “Student-Curriculum-Discourse” self-tutorial guide, and tasks alignment of the teaching/learning and assessment. Learners’ performance can be improved through a curriculum-discourse self-tutorial exercise, complemented with: intellectual, social, experiential, and emotional structures. Both educators and learners share specific responsibilities in the teaching/learning environment. There is need to expand/probe the theoretical dimension within which the on-line distance education occurs.
- Full Text:
- Date Issued: 2013
Axial coordination of zinc and silicon phthalocyanines to silver and gold nanoparticles: an investigation of their photophysicochemical and antimicrobial behavior
- Masilela, Nkosiphile, Antunes, Edith M, Nyokong, Tebello
- Authors: Masilela, Nkosiphile , Antunes, Edith M , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241818 , vital:50972 , xlink:href="https://doi.org/10.1142/S1088424613500016"
- Description: This work reports on the axial coordination of zinc phthalocyanine and bis-(1,6-hexanedithiol) silicon phthalocyanine to silver and gold nanoparticles. Red shifting of absorption spectra of the phthalocyanine complexes was observed after conjugation with the nanoparticles. An improvement in the photophysicochemical behavior and antimicrobial activity was achieved in the presence of metal nanoparticles for both complexes. A decrease in triplet lifetimes was observed for all the phthalocyanine metal nanoparticle conjugates. The Zn phthalocyanine complex gave the highest triplet and singlet oxygen quantum yield in the presence of gold nanoparticles. On the other hand, the bacterial inhibition was found to be best for the Si phthalocyanine derivative in the presence of nanoparticles compared to the Zn phthalocyanine counterpart. The highest antimicrobial activity was achieved for both conjugates against B. subtilis compared to S. aureaus both in the dark and under illumination with light.
- Full Text:
- Date Issued: 2013
- Authors: Masilela, Nkosiphile , Antunes, Edith M , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241818 , vital:50972 , xlink:href="https://doi.org/10.1142/S1088424613500016"
- Description: This work reports on the axial coordination of zinc phthalocyanine and bis-(1,6-hexanedithiol) silicon phthalocyanine to silver and gold nanoparticles. Red shifting of absorption spectra of the phthalocyanine complexes was observed after conjugation with the nanoparticles. An improvement in the photophysicochemical behavior and antimicrobial activity was achieved in the presence of metal nanoparticles for both complexes. A decrease in triplet lifetimes was observed for all the phthalocyanine metal nanoparticle conjugates. The Zn phthalocyanine complex gave the highest triplet and singlet oxygen quantum yield in the presence of gold nanoparticles. On the other hand, the bacterial inhibition was found to be best for the Si phthalocyanine derivative in the presence of nanoparticles compared to the Zn phthalocyanine counterpart. The highest antimicrobial activity was achieved for both conjugates against B. subtilis compared to S. aureaus both in the dark and under illumination with light.
- Full Text:
- Date Issued: 2013
Catalytic oxidation of thioanisole using oxovanadium (IV)‐functionalized electrospun polybenzimidazole nanofibers
- Walmsley, Ryan S, Hlangothi, Percy, Litwinski, Christian, Nyokong, Tebello, Torto, Nelson, Tshentu, Zenixole R
- Authors: Walmsley, Ryan S , Hlangothi, Percy , Litwinski, Christian , Nyokong, Tebello , Torto, Nelson , Tshentu, Zenixole R
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/242083 , vital:51000 , xlink:href="https://doi.org/10.1002/app.38067"
- Description: Polybenzimidazole fibers, with an average diameter of 262 nm, were produced by the process of electrospinning. These fibers were used as a solid support material for the immobilization of oxovanadium(IV) which was achieved via a reaction with vanadyl sulfate. The oxovanadium(IV)-functionalized nanofibers were used as heterogeneous catalysts for the oxidation of thioanisole under both batch and pseudo-continuous flow conditions with great success. Under batch conditions near quantitative oxidation of thioanisole was achieved in under 90 min, even after four successive catalytic reactions. Under continuous conditions, excellent conversion of thioanisole was maintained throughout the period studied at flow rates of up to 2 mLh−1. This study, therefore, proposes that electrospun polybenzimidazole nanofibers, with their small diameters, impressive chemical and thermal stability, as well as coordinating benzimidazole group, may be a desirable support material for immobilization of homogeneous catalysts.
- Full Text:
- Date Issued: 2013
- Authors: Walmsley, Ryan S , Hlangothi, Percy , Litwinski, Christian , Nyokong, Tebello , Torto, Nelson , Tshentu, Zenixole R
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/242083 , vital:51000 , xlink:href="https://doi.org/10.1002/app.38067"
- Description: Polybenzimidazole fibers, with an average diameter of 262 nm, were produced by the process of electrospinning. These fibers were used as a solid support material for the immobilization of oxovanadium(IV) which was achieved via a reaction with vanadyl sulfate. The oxovanadium(IV)-functionalized nanofibers were used as heterogeneous catalysts for the oxidation of thioanisole under both batch and pseudo-continuous flow conditions with great success. Under batch conditions near quantitative oxidation of thioanisole was achieved in under 90 min, even after four successive catalytic reactions. Under continuous conditions, excellent conversion of thioanisole was maintained throughout the period studied at flow rates of up to 2 mLh−1. This study, therefore, proposes that electrospun polybenzimidazole nanofibers, with their small diameters, impressive chemical and thermal stability, as well as coordinating benzimidazole group, may be a desirable support material for immobilization of homogeneous catalysts.
- Full Text:
- Date Issued: 2013
Characterisation of novel CrleGV isolates for false codling moth control-lessons learnt from codling moth resistance to CpGV. Characterisation of novel CrleGV isolates for false codling moth control-lessons learnt from codling moth resistance to CpGV
- Opoku-Debrah, John K, Moore, Sean D, Hill, Martin P, Knox, Caroline M
- Authors: Opoku-Debrah, John K , Moore, Sean D , Hill, Martin P , Knox, Caroline M
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/425414 , vital:72237 , xlink:href="https://www.cabdirect.org/cabdirect/abstract/20133257674"
- Description: Recently some codling moth, Cydia pomonella, populations in Europe developed resistance to CpGV. In order to prepare for the possibility of a similar occurrence with the false codling moth, Thaumatotibia leucotreta, in South Africa, a search was conducted for novel CrleGV isolates. Through overcrowding, outbreaks of novel isolates were recorded from laboratory populations of five geographically distinct host populations. The genetic novelty of these and two commercially available isolates was confirmed through restriction enzyme analysis and sequence analysis of the granulin and egt genes. Phylogenetic analysis showed the existence of two CrleGV-SA genome types. Significant differences in virulence were also shown between certain isolates against certain host populations.
- Full Text:
- Date Issued: 2013
- Authors: Opoku-Debrah, John K , Moore, Sean D , Hill, Martin P , Knox, Caroline M
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/425414 , vital:72237 , xlink:href="https://www.cabdirect.org/cabdirect/abstract/20133257674"
- Description: Recently some codling moth, Cydia pomonella, populations in Europe developed resistance to CpGV. In order to prepare for the possibility of a similar occurrence with the false codling moth, Thaumatotibia leucotreta, in South Africa, a search was conducted for novel CrleGV isolates. Through overcrowding, outbreaks of novel isolates were recorded from laboratory populations of five geographically distinct host populations. The genetic novelty of these and two commercially available isolates was confirmed through restriction enzyme analysis and sequence analysis of the granulin and egt genes. Phylogenetic analysis showed the existence of two CrleGV-SA genome types. Significant differences in virulence were also shown between certain isolates against certain host populations.
- Full Text:
- Date Issued: 2013
Characterization and electrocatalytic behaviour of glassy carbon electrode modified with nickel nanoparticles towards amitrole detection
- Maringa, Audacity, Mugadza, Tawanda, Antunes, Edith M, Nyokong, Tebello
- Authors: Maringa, Audacity , Mugadza, Tawanda , Antunes, Edith M , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241793 , vital:50970 , xlink:href="https://doi.org/10.1016/j.jelechem.2013.04.022"
- Description: We report on the synthesis of Ni nanoparticles (NiNPs) and their application in electrocatalysis in comparison with nickel phthalocyanine (NiPc). UV–vis spectroscopy, powder X-ray diffraction, transmission electron microscopy and electron paramagnetic resonance were used in the characterization of NiNPs. Cyclic voltammetry and electrochemical impedance spectroscopy were used in electrocatalytic studies of amitrole on the glassy carbon electrode modified with NiNPs. The apparent and catalytic rate constants for amitrole on the NiNP-GCE were found to be 2.58 × 10−5 cm s−1 and 1.11 × 103 M−1 s−1, respectively.
- Full Text:
- Date Issued: 2013
- Authors: Maringa, Audacity , Mugadza, Tawanda , Antunes, Edith M , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241793 , vital:50970 , xlink:href="https://doi.org/10.1016/j.jelechem.2013.04.022"
- Description: We report on the synthesis of Ni nanoparticles (NiNPs) and their application in electrocatalysis in comparison with nickel phthalocyanine (NiPc). UV–vis spectroscopy, powder X-ray diffraction, transmission electron microscopy and electron paramagnetic resonance were used in the characterization of NiNPs. Cyclic voltammetry and electrochemical impedance spectroscopy were used in electrocatalytic studies of amitrole on the glassy carbon electrode modified with NiNPs. The apparent and catalytic rate constants for amitrole on the NiNP-GCE were found to be 2.58 × 10−5 cm s−1 and 1.11 × 103 M−1 s−1, respectively.
- Full Text:
- Date Issued: 2013
Characterization and photophysical behavior of phthalocyanines when grafted onto silica nanoparticles
- Fashina, Adedayo, Antunes, Edith M, Nyokong, Tebello
- Authors: Fashina, Adedayo , Antunes, Edith M , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241981 , vital:50989 , xlink:href="https://doi.org/10.1016/j.poly.2013.01.037"
- Description: This work reports on the functionalization of silica nanoparticles with zinc phthalocyanine complexes tetra-substituted non-peripherally with 4-carboxyphenoxyl and 3-carboxyphenoxyl groups. The phthalocyanine dyes have a free carboxyl group, facilitating the covalent attachment of the dyes on the silica surface via amide bond formation. The phthalocyanine functionalized silica nanoparticles showed higher fluorescence and triplet quantum yields as well as longer triplet lifetimes compared to the free phthalocyanines.
- Full Text:
- Date Issued: 2013
- Authors: Fashina, Adedayo , Antunes, Edith M , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241981 , vital:50989 , xlink:href="https://doi.org/10.1016/j.poly.2013.01.037"
- Description: This work reports on the functionalization of silica nanoparticles with zinc phthalocyanine complexes tetra-substituted non-peripherally with 4-carboxyphenoxyl and 3-carboxyphenoxyl groups. The phthalocyanine dyes have a free carboxyl group, facilitating the covalent attachment of the dyes on the silica surface via amide bond formation. The phthalocyanine functionalized silica nanoparticles showed higher fluorescence and triplet quantum yields as well as longer triplet lifetimes compared to the free phthalocyanines.
- Full Text:
- Date Issued: 2013
Characterization of bioflocculants produced by consortia of three marine bacteria belonging to the genera bacillus and cobetia previously isolated from the bottom sediment of Algoa Bay in the Eastern Cape Province of South Africa
- Ugbenyen, Anthony Moses https://orcid.org/0000-0002-1381-3428
- Authors: Ugbenyen, Anthony Moses https://orcid.org/0000-0002-1381-3428
- Date: 2013
- Subjects: Water -- Purification -- Flocculation , Water quality management , Flocculation
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24454 , vital:62804
- Description: The bioflocculant-producing potentials of three marine bacteria isolated from the sediment samples of Algoa Bay in the Eastern Cape Province of South Africa were assessed. Analysis of the partial nucleotide sequence of the 16S rDNA of the bacteria revealed 99 percent, 99 percent, and 98 percent similarity to Cobetia sp. L222, Bacillus sp. A-5A, and Bacillus sp. HXG-C1 respectively and the sequence was deposited in GenBank as Cobetia sp. OAUIFE, Bacillus sp. MAYA and Bacillus sp. Gilbert (accession number JF799092, JF799093, and HQ537128 respectively). Cultivation condition studies for Cobetia sp. OAUIFE revealed that bioflocculant production was optimal with an inoculum size of 2 percent (v/v), initial pH of 6.0, Mn2+ as the metal ion, and glucose as the carbon source. Metal ions, including Na+, K+, Li+, Ca2+and Mg2+ stimulated bioflocculant production resulting in flocculating activity of above 90 percent. This crude bioflocculant is thermally stable, with about 78 percent of its flocculating activity remaining after heating at 100 oC for 25 min. Analysis of the purified bioflocculant revealed it to be an acidic extracellular polysaccharide. FTIR analysis revealed the presence of methoxyl, hydroxyl, and carboxyl - groups in the compound bioflocculant and SEM micrograph of the bioflocculant revealed a crystal-linear structure. On the other hand, bioflocculant production by Bacillus sp. MAYA was optimal when glucose (95.6 percent flocculating activity) and ammonium nitrate (83.3 percent flocculating activity) were used as carbon and nitrogen sources respectively; inoculum size was 2 percent (v/v); initial pH 6; and Ca2+ as coagulant aid. Chemical analysis of the purified bioflocculant shows that it is composed of uronic acid, neutral sugar and protein. FTIR analysis also revealed the presence of methoxyl, hydroxyl, carboxyl and amino- groups in this bioflocculant. The bioflocculant is thermostable with about 65.6 percent residual flocculating activity retained after heating the bioflocculant at 100 oC for 25 min. However bioflocculant production by Bacillus sp. Gilbert was optimal when sodium carbonate (95.2 percent flocculating activity) and potassium nitrate (76.6 percent flocculating activity) were used as carbon and nitrogen sources respectively; inoculum size was 3 percent (v/v); initial pH 9; and Al3+ as cation. The crude bioflocculant retained 44.2 percent residual flocculating activity after heating at 100 oC for 15 min. FTIR analysis reveals the presence of hydroxyl, carboxyl and methylene - groups in the compound bioflocculant. SEM micrograph of the bioflocculant revealed an amorphous compound. The consortia of these bacteria strains also produced bioflocculants with high flocculating activities which were highly efficient in removing turbidity and chemical oxygen demand (COD) from brewery wastewater, diary wastewater and river water. The bioflocculants from the consortia seemed better than traditional flocculants such as alum . The characteristics of the bioflocculant produced by the consortium of Cobetia sp. OAUIFE and Bacillus sp. MAYA showed that this extracellular bioflocculant, composed of 66percent uronic acid and 31percent protein and an optimum flocculation (90 percent) of kaolin suspension, when the dosage concentration was 0.8 mg/ml, under weak alkaline pH of 8, and Ca2+ as a coagulant aid. The bioflocculant is thermally stable, with a high residual flocculating activity of 86.7 percent, 89.3 percent and 87.0 percent after heating at 50 oC, 80 oC and 100 oC for 25 min respectively. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl functional groups. Scanning electron microscopy (SEM) image revealed a crystal-linear spongy-like bioflocculant structure and EDX analysis of the purified bioflocculant showed that the elemental composition in mass proportion of C,N,O,S and P was 6.67:6.23:37.55:0.38:4.42 (percent w/w). However, the characteristics of the bioflocculant produced by the consortium of Cobetia sp OAUIFE and Bacillus sp. Gilbert showed an optimum flocculation (90 percent) of kaolin suspension when the dosage concentration was 0.2 mg/ml, under neutral pH of 7, and Ca2+ as a coagulant aid. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl and carbonyl functional groups. Scanning electron microscopy (SEM) image revealed an amorphous morphology. On the other hand the bioflocculant produced by the consortium of Bacillus sp. MAYA and Bacillus sp. Gilbert showed similar characteristic with the bioflocculant from the consortium of Cobetia sp. OAUIFE and Bacillus sp. Gilbert except for Al3+ being the preferred coagulant aid. The characteristics of the bioflocculant produced by the consortium of Cobetia sp. OAUIFE, Bacillus sp. MAYA and Bacillus sp. Gilbert showed an optimum flocculation (87 percent) of kaolin suspension when the dosage concentration was 1.0 mg/ml. Under strong alkaline pH of 12, flocculating activity reached (95 percent) when Al3+ was the coagulant aid. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl and phosphoryl functional groups. Scanning electron microscopy (SEM) image revealed a flaky amorphous morphological structure. Due to the excellent COD and turbidity removal efficiencies of the bioflocculants produced by the consortia, these make those attractive candidates for use in water and wastewater treatment. , Thesis (PhD) -- Faculty of Science and Agriculture, 2013
- Full Text:
- Date Issued: 2013
- Authors: Ugbenyen, Anthony Moses https://orcid.org/0000-0002-1381-3428
- Date: 2013
- Subjects: Water -- Purification -- Flocculation , Water quality management , Flocculation
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24454 , vital:62804
- Description: The bioflocculant-producing potentials of three marine bacteria isolated from the sediment samples of Algoa Bay in the Eastern Cape Province of South Africa were assessed. Analysis of the partial nucleotide sequence of the 16S rDNA of the bacteria revealed 99 percent, 99 percent, and 98 percent similarity to Cobetia sp. L222, Bacillus sp. A-5A, and Bacillus sp. HXG-C1 respectively and the sequence was deposited in GenBank as Cobetia sp. OAUIFE, Bacillus sp. MAYA and Bacillus sp. Gilbert (accession number JF799092, JF799093, and HQ537128 respectively). Cultivation condition studies for Cobetia sp. OAUIFE revealed that bioflocculant production was optimal with an inoculum size of 2 percent (v/v), initial pH of 6.0, Mn2+ as the metal ion, and glucose as the carbon source. Metal ions, including Na+, K+, Li+, Ca2+and Mg2+ stimulated bioflocculant production resulting in flocculating activity of above 90 percent. This crude bioflocculant is thermally stable, with about 78 percent of its flocculating activity remaining after heating at 100 oC for 25 min. Analysis of the purified bioflocculant revealed it to be an acidic extracellular polysaccharide. FTIR analysis revealed the presence of methoxyl, hydroxyl, and carboxyl - groups in the compound bioflocculant and SEM micrograph of the bioflocculant revealed a crystal-linear structure. On the other hand, bioflocculant production by Bacillus sp. MAYA was optimal when glucose (95.6 percent flocculating activity) and ammonium nitrate (83.3 percent flocculating activity) were used as carbon and nitrogen sources respectively; inoculum size was 2 percent (v/v); initial pH 6; and Ca2+ as coagulant aid. Chemical analysis of the purified bioflocculant shows that it is composed of uronic acid, neutral sugar and protein. FTIR analysis also revealed the presence of methoxyl, hydroxyl, carboxyl and amino- groups in this bioflocculant. The bioflocculant is thermostable with about 65.6 percent residual flocculating activity retained after heating the bioflocculant at 100 oC for 25 min. However bioflocculant production by Bacillus sp. Gilbert was optimal when sodium carbonate (95.2 percent flocculating activity) and potassium nitrate (76.6 percent flocculating activity) were used as carbon and nitrogen sources respectively; inoculum size was 3 percent (v/v); initial pH 9; and Al3+ as cation. The crude bioflocculant retained 44.2 percent residual flocculating activity after heating at 100 oC for 15 min. FTIR analysis reveals the presence of hydroxyl, carboxyl and methylene - groups in the compound bioflocculant. SEM micrograph of the bioflocculant revealed an amorphous compound. The consortia of these bacteria strains also produced bioflocculants with high flocculating activities which were highly efficient in removing turbidity and chemical oxygen demand (COD) from brewery wastewater, diary wastewater and river water. The bioflocculants from the consortia seemed better than traditional flocculants such as alum . The characteristics of the bioflocculant produced by the consortium of Cobetia sp. OAUIFE and Bacillus sp. MAYA showed that this extracellular bioflocculant, composed of 66percent uronic acid and 31percent protein and an optimum flocculation (90 percent) of kaolin suspension, when the dosage concentration was 0.8 mg/ml, under weak alkaline pH of 8, and Ca2+ as a coagulant aid. The bioflocculant is thermally stable, with a high residual flocculating activity of 86.7 percent, 89.3 percent and 87.0 percent after heating at 50 oC, 80 oC and 100 oC for 25 min respectively. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl functional groups. Scanning electron microscopy (SEM) image revealed a crystal-linear spongy-like bioflocculant structure and EDX analysis of the purified bioflocculant showed that the elemental composition in mass proportion of C,N,O,S and P was 6.67:6.23:37.55:0.38:4.42 (percent w/w). However, the characteristics of the bioflocculant produced by the consortium of Cobetia sp OAUIFE and Bacillus sp. Gilbert showed an optimum flocculation (90 percent) of kaolin suspension when the dosage concentration was 0.2 mg/ml, under neutral pH of 7, and Ca2+ as a coagulant aid. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl and carbonyl functional groups. Scanning electron microscopy (SEM) image revealed an amorphous morphology. On the other hand the bioflocculant produced by the consortium of Bacillus sp. MAYA and Bacillus sp. Gilbert showed similar characteristic with the bioflocculant from the consortium of Cobetia sp. OAUIFE and Bacillus sp. Gilbert except for Al3+ being the preferred coagulant aid. The characteristics of the bioflocculant produced by the consortium of Cobetia sp. OAUIFE, Bacillus sp. MAYA and Bacillus sp. Gilbert showed an optimum flocculation (87 percent) of kaolin suspension when the dosage concentration was 1.0 mg/ml. Under strong alkaline pH of 12, flocculating activity reached (95 percent) when Al3+ was the coagulant aid. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl and phosphoryl functional groups. Scanning electron microscopy (SEM) image revealed a flaky amorphous morphological structure. Due to the excellent COD and turbidity removal efficiencies of the bioflocculants produced by the consortia, these make those attractive candidates for use in water and wastewater treatment. , Thesis (PhD) -- Faculty of Science and Agriculture, 2013
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- Date Issued: 2013