Regulating franchise operations in South Africa : a study of the existing legal framework with suggestions for reform.
- Authors: Woker, Tanya Ann
- Date: 2009
- Subjects: Franchise Association of Southern Africa , Franchises (Retail trade) -- Law and legislation -- South Africa , South Africa. Dept. of Trade and Industry , Common law -- South Africa , Commercial law -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3721 , http://hdl.handle.net/10962/d1015719
- Description: This thesis analyses the existing legal framework that applies to franchising in South Africa today. The study begins with an examination of the history and nature of the franchise contract, focusing particularly on the nature of the franchise relationship. This study is undertaken in order to substantiate the argument that franchising is a unique method of doing business. There is a need therefore to recognise that the franchise contract is a special contract in its own right, just like contracts of sale, lease, insurance and suretyship. The study then goes on to examine the problems which are experienced in the sector, as well as the law which must provide solutions to these problems. The research will show that in a modern commercial world the existing legal framework, especially the common law, cannot adequately deal with many of these problems. The complex relationship between franchising and competition law is also explored. A common thread that emerges from franchise disputes is the lack of protection afforded to the interests of franchisees. Franchisees tend to be at the mercy of economically stronger franchisors, hence the belief that there is a need for a stronger regulatory framework. The study then shifts to proposals for reform. In 2000 the Department of Trade and Industry (DTI) established the Franchise Steering Committee in conjunction with the Franchise Association of South Africa (FASA) to review the regulatory environment. This Committee drafted franchise legislation which aimed to bring the regulation of the sector under the control of the DTI. This legislation has not been implemented and the DTI has changed its strategy. Instead of dealing with franchising independently, franchising will fall within the scope of consumer protection legislation. Both the consumer protection legislation and the legislation proposed by the Franchise Steering Committee are thoroughly examined and explained. Shortcomings in the proposals are highlighted and an alternative approach is recommended. It is proposed that franchise-specific legislation should be introduced but that this legislation should establish a system of co-regulation between the government and the franchise sector.
- Full Text:
- Date Issued: 2009
- Authors: Woker, Tanya Ann
- Date: 2009
- Subjects: Franchise Association of Southern Africa , Franchises (Retail trade) -- Law and legislation -- South Africa , South Africa. Dept. of Trade and Industry , Common law -- South Africa , Commercial law -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3721 , http://hdl.handle.net/10962/d1015719
- Description: This thesis analyses the existing legal framework that applies to franchising in South Africa today. The study begins with an examination of the history and nature of the franchise contract, focusing particularly on the nature of the franchise relationship. This study is undertaken in order to substantiate the argument that franchising is a unique method of doing business. There is a need therefore to recognise that the franchise contract is a special contract in its own right, just like contracts of sale, lease, insurance and suretyship. The study then goes on to examine the problems which are experienced in the sector, as well as the law which must provide solutions to these problems. The research will show that in a modern commercial world the existing legal framework, especially the common law, cannot adequately deal with many of these problems. The complex relationship between franchising and competition law is also explored. A common thread that emerges from franchise disputes is the lack of protection afforded to the interests of franchisees. Franchisees tend to be at the mercy of economically stronger franchisors, hence the belief that there is a need for a stronger regulatory framework. The study then shifts to proposals for reform. In 2000 the Department of Trade and Industry (DTI) established the Franchise Steering Committee in conjunction with the Franchise Association of South Africa (FASA) to review the regulatory environment. This Committee drafted franchise legislation which aimed to bring the regulation of the sector under the control of the DTI. This legislation has not been implemented and the DTI has changed its strategy. Instead of dealing with franchising independently, franchising will fall within the scope of consumer protection legislation. Both the consumer protection legislation and the legislation proposed by the Franchise Steering Committee are thoroughly examined and explained. Shortcomings in the proposals are highlighted and an alternative approach is recommended. It is proposed that franchise-specific legislation should be introduced but that this legislation should establish a system of co-regulation between the government and the franchise sector.
- Full Text:
- Date Issued: 2009
Repetitive symbolic play as a therapeutic process
- Authors: Campbell, Megan
- Date: 2009
- Subjects: Play therapy Symbolic play Child psychology Developmental psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2944 , http://hdl.handle.net/10962/d1002453
- Description: Child centred play therapy theory explains that the facilitative environment of the relationship between child and play therapist allows the child the opportunity to confront emotional pain imbedded in lived, relational experiences, and in so doing process and gain mastery over it. However very little research exists into how the child, through his use of repetitive, symbolic play, as a therapeutic process, achieves this resolution. This research project aims to address this gap in research by exploring and describing repetitive symbolic play as a therapeutic process within child centred play therapy that facilitates change in the child‟s sense of self, assisting him towards healthy adjustment. The research project uses a young boys‟ therapeutic process as a case study, employing a qualitative research design that draws from interpretative research. Fourteen repetitive play sequence themes were analysed within the context of the case formulation and follow-up feedback meetings that took place throughout the therapy process. Using a hermeneutic enquiry the researcher illustrates how the child‟s sense of self, dependent on his perceptions of his external environment, became far more congruent, as evident through his behaviour, when his environment, first in play therapy, then at home and at school became more consistent, supportive and nurturing. Within this facilitative environment the researcher then describes how the child used repetitive symbolic play to address and process emotional issues relating to earlier experiences within his external environment. Hermeneutic analysis suggests that the child‟s use of repetitive symbolic play within the facilitative relationship between him and his therapist became a therapeutic process in and of itself that contributed towards self-directed healing, and change within his sense of self, that promoted healthier adjustment within his environment.
- Full Text:
- Date Issued: 2009
- Authors: Campbell, Megan
- Date: 2009
- Subjects: Play therapy Symbolic play Child psychology Developmental psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2944 , http://hdl.handle.net/10962/d1002453
- Description: Child centred play therapy theory explains that the facilitative environment of the relationship between child and play therapist allows the child the opportunity to confront emotional pain imbedded in lived, relational experiences, and in so doing process and gain mastery over it. However very little research exists into how the child, through his use of repetitive, symbolic play, as a therapeutic process, achieves this resolution. This research project aims to address this gap in research by exploring and describing repetitive symbolic play as a therapeutic process within child centred play therapy that facilitates change in the child‟s sense of self, assisting him towards healthy adjustment. The research project uses a young boys‟ therapeutic process as a case study, employing a qualitative research design that draws from interpretative research. Fourteen repetitive play sequence themes were analysed within the context of the case formulation and follow-up feedback meetings that took place throughout the therapy process. Using a hermeneutic enquiry the researcher illustrates how the child‟s sense of self, dependent on his perceptions of his external environment, became far more congruent, as evident through his behaviour, when his environment, first in play therapy, then at home and at school became more consistent, supportive and nurturing. Within this facilitative environment the researcher then describes how the child used repetitive symbolic play to address and process emotional issues relating to earlier experiences within his external environment. Hermeneutic analysis suggests that the child‟s use of repetitive symbolic play within the facilitative relationship between him and his therapist became a therapeutic process in and of itself that contributed towards self-directed healing, and change within his sense of self, that promoted healthier adjustment within his environment.
- Full Text:
- Date Issued: 2009
Restoration of degraded subtropical thickets in the Baviaanskloof Megareserve, South Africa: the role of carbon stocks and Portulacaria afra survivorship
- Authors: Powell, Michael John
- Date: 2009
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Portulacaceae -- South Africa -- Eastern Cape , Biodiversity conservation -- South Africa -- Eastern Cape , Plant conservation -- South Africa -- Eastern Cape , Shrubs -- South Africa -- Eastern Cape , Succulent plants -- South Africa -- Eastern Cape , Baviaanskloof (South Africa)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4764 , http://hdl.handle.net/10962/d1007164 , Portulacaria afra -- South Africa -- Eastern Cape , Portulacaceae -- South Africa -- Eastern Cape , Biodiversity conservation -- South Africa -- Eastern Cape , Plant conservation -- South Africa -- Eastern Cape , Shrubs -- South Africa -- Eastern Cape , Succulent plants -- South Africa -- Eastern Cape , Baviaanskloof (South Africa)
- Description: The semi-arid forms of subtropical thicket in the Eastern and Western Cape have been heavily degraded through unsustainable pastoralism over the last century or more. The degraded areas exhibit a significant loss of above-ground and belowground carbon stocks, and consequently provide an opportunity for restoration through the formal and informal carbon markets. A prerequisite for the attainment of carbon credits is to ensure sound carbon stock baselines prior to effecting restoration. I report on the carbon stocks (including sub-pools) for a number of intact subtropical thicket types, as well as the differentials between the intact and degraded states (including the sub-pools). Total carbon stocks (TCS in t C ha⁻¹) for intact vegetation (to a soil depth 0–25 cm), ranged from 87.73±6.51 to 70.64±17.24. For degraded vegetation (including old lands), TCS (t C ha⁻¹) ranged from 34.05±3.61 to 21.03±2.70. For all vegetation types, the differentials in TCS along the degradation gradient (0–25 cm) are highly significant and strengthen the possibility for carbon credit financing to catalyse the restoration of the degraded semi-arid subtropical thickets. This study has shown a mean loss of 57.23 t C ha⁻¹ in Baviaanskloof spekboom thickets, when measured to a soil depth of 25 cm. Portulacaria afra is a key species within the semi-arid subtropical thickets, being a canopy dominant and a driver of soil nutrient status, but has been largely lost from the degraded landscapes. Degraded semi-arid subtropical thicket vegetation lacks regeneration via seedling recruitment; restoration therefore requires the manual replanting of P. afra using cut truncheons. Survivorship trials were undertaken infield in 2005 to establish restoration protocols for P. afra, with survivorship being recorded in 2006 and 2008. Overall survivorship for all treatments was found to be 43.2±2.8% in 2006, dropping to 35.8±2.7% in 2008. Planting posture (flat or upright) showed the most significant results of all the factors tested in 2006 and 2008. Micro-damming also influenced survivorship in that micro-damming was associated with marginally higher survivorship (47.4 ±2.0% with damming vs. 39.1±1.5% without damming in 2006, and 39.3±1.9% vs. 32.3±1.5% in 2008). Higher planting density only showed a significant positive impact on survivorship in 2008. Neither stem diameter nor clumping significantly affected degree of survival. A key finding in the study has been the non-static nature of P. afra truncheon survivorship, even after being well established (three years since planting). The results from the study will guide the restoration protocols for the restoration of degraded subtropical thickets, where P. afra requires replanting.
- Full Text:
- Date Issued: 2009
- Authors: Powell, Michael John
- Date: 2009
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Portulacaceae -- South Africa -- Eastern Cape , Biodiversity conservation -- South Africa -- Eastern Cape , Plant conservation -- South Africa -- Eastern Cape , Shrubs -- South Africa -- Eastern Cape , Succulent plants -- South Africa -- Eastern Cape , Baviaanskloof (South Africa)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4764 , http://hdl.handle.net/10962/d1007164 , Portulacaria afra -- South Africa -- Eastern Cape , Portulacaceae -- South Africa -- Eastern Cape , Biodiversity conservation -- South Africa -- Eastern Cape , Plant conservation -- South Africa -- Eastern Cape , Shrubs -- South Africa -- Eastern Cape , Succulent plants -- South Africa -- Eastern Cape , Baviaanskloof (South Africa)
- Description: The semi-arid forms of subtropical thicket in the Eastern and Western Cape have been heavily degraded through unsustainable pastoralism over the last century or more. The degraded areas exhibit a significant loss of above-ground and belowground carbon stocks, and consequently provide an opportunity for restoration through the formal and informal carbon markets. A prerequisite for the attainment of carbon credits is to ensure sound carbon stock baselines prior to effecting restoration. I report on the carbon stocks (including sub-pools) for a number of intact subtropical thicket types, as well as the differentials between the intact and degraded states (including the sub-pools). Total carbon stocks (TCS in t C ha⁻¹) for intact vegetation (to a soil depth 0–25 cm), ranged from 87.73±6.51 to 70.64±17.24. For degraded vegetation (including old lands), TCS (t C ha⁻¹) ranged from 34.05±3.61 to 21.03±2.70. For all vegetation types, the differentials in TCS along the degradation gradient (0–25 cm) are highly significant and strengthen the possibility for carbon credit financing to catalyse the restoration of the degraded semi-arid subtropical thickets. This study has shown a mean loss of 57.23 t C ha⁻¹ in Baviaanskloof spekboom thickets, when measured to a soil depth of 25 cm. Portulacaria afra is a key species within the semi-arid subtropical thickets, being a canopy dominant and a driver of soil nutrient status, but has been largely lost from the degraded landscapes. Degraded semi-arid subtropical thicket vegetation lacks regeneration via seedling recruitment; restoration therefore requires the manual replanting of P. afra using cut truncheons. Survivorship trials were undertaken infield in 2005 to establish restoration protocols for P. afra, with survivorship being recorded in 2006 and 2008. Overall survivorship for all treatments was found to be 43.2±2.8% in 2006, dropping to 35.8±2.7% in 2008. Planting posture (flat or upright) showed the most significant results of all the factors tested in 2006 and 2008. Micro-damming also influenced survivorship in that micro-damming was associated with marginally higher survivorship (47.4 ±2.0% with damming vs. 39.1±1.5% without damming in 2006, and 39.3±1.9% vs. 32.3±1.5% in 2008). Higher planting density only showed a significant positive impact on survivorship in 2008. Neither stem diameter nor clumping significantly affected degree of survival. A key finding in the study has been the non-static nature of P. afra truncheon survivorship, even after being well established (three years since planting). The results from the study will guide the restoration protocols for the restoration of degraded subtropical thickets, where P. afra requires replanting.
- Full Text:
- Date Issued: 2009
Restructuring of the Port Elizabeth Hospital Complex: a perspective from the planned change management approach
- Authors: Qwesha, Babalwa
- Date: 2009
- Subjects: Hospitals -- Administration -- South Africa -- Port Elizabeth Organizational change -- Management -- South Africa Case studies
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:762 , http://hdl.handle.net/10962/d1003883
- Description: The research objectives which underpin this study were threefold. Firstly was to analyze the Port Elizabeth Hospital Complex (PEHC) restructuring process from a planned changed management perspective in particular the three stage model of Lewin (1951) which include unfreezing the current equilibrium, moving to a new position and refreezing in the new position. Secondly was to analyze how unforeseen circumstances were dealt with. Thirdly was to analyse the setting of objectives and measurements of targets to monitor progress. The study is based on the restructuring that took place in the PEHC which was called “Rationalization”. The research indicates that the development and implementation of the rationalization cannot be understood from the perspective of the three stage model of Lewin (1951). The conclusion was based on the manager’s perceptions of their analysis of the restructuring in the light of the theory of the three stage model of Lewin (1951). The study has shown that: · Rationalisation began by gathering information on the shortcomings of the structure of the three hospitals, but did not understand the degree of readiness to change. · The timescales for achieving rationalization were not clearly defined. · It was driven from the top with clear objectives and no timescales. · There was no structure that prepared the employees to go through the process of rationalisation. · There was lack of capacity of middle managers to respond to the workers in an encouraging way. · Rationalisation sub-committees had limited time to meet with employees at the sectional level. · External stakeholder involvement was not mobilized to its full potential. · Rationalisation was not an open process that involved both formal and informal employees. · Budget constraints and staff shortages were not informed by the restructuring needs. · Workers did not feel secure about the current and future work practises. · There was no feeling that the change will be beneficial to their wellbeing and to the organisation’s goals and mission · There was no monitoring and evaluation put in place to track progress. · There was centralisation of even the most basic administrative functions. The study seems to imply that the restructuring in the PEHC bears no resemblance to the Lewin (1951) planned change model and therefore cannot be understood from the perspective of this model. Given the initiative to rationalize, the PEHC management can learn from the model of Lewin (1951) planned change.
- Full Text:
- Date Issued: 2009
- Authors: Qwesha, Babalwa
- Date: 2009
- Subjects: Hospitals -- Administration -- South Africa -- Port Elizabeth Organizational change -- Management -- South Africa Case studies
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:762 , http://hdl.handle.net/10962/d1003883
- Description: The research objectives which underpin this study were threefold. Firstly was to analyze the Port Elizabeth Hospital Complex (PEHC) restructuring process from a planned changed management perspective in particular the three stage model of Lewin (1951) which include unfreezing the current equilibrium, moving to a new position and refreezing in the new position. Secondly was to analyze how unforeseen circumstances were dealt with. Thirdly was to analyse the setting of objectives and measurements of targets to monitor progress. The study is based on the restructuring that took place in the PEHC which was called “Rationalization”. The research indicates that the development and implementation of the rationalization cannot be understood from the perspective of the three stage model of Lewin (1951). The conclusion was based on the manager’s perceptions of their analysis of the restructuring in the light of the theory of the three stage model of Lewin (1951). The study has shown that: · Rationalisation began by gathering information on the shortcomings of the structure of the three hospitals, but did not understand the degree of readiness to change. · The timescales for achieving rationalization were not clearly defined. · It was driven from the top with clear objectives and no timescales. · There was no structure that prepared the employees to go through the process of rationalisation. · There was lack of capacity of middle managers to respond to the workers in an encouraging way. · Rationalisation sub-committees had limited time to meet with employees at the sectional level. · External stakeholder involvement was not mobilized to its full potential. · Rationalisation was not an open process that involved both formal and informal employees. · Budget constraints and staff shortages were not informed by the restructuring needs. · Workers did not feel secure about the current and future work practises. · There was no feeling that the change will be beneficial to their wellbeing and to the organisation’s goals and mission · There was no monitoring and evaluation put in place to track progress. · There was centralisation of even the most basic administrative functions. The study seems to imply that the restructuring in the PEHC bears no resemblance to the Lewin (1951) planned change model and therefore cannot be understood from the perspective of this model. Given the initiative to rationalize, the PEHC management can learn from the model of Lewin (1951) planned change.
- Full Text:
- Date Issued: 2009
Rhodes University Graduation Ceremony 2009
- Authors: Rhodes University
- Date: 2009
- Language: English
- Type: text
- Identifier: vital:8138 , http://hdl.handle.net/10962/d1007250
- Description: Rhodes University Graduation Ceremonies [at] 1820 Settlers National Monument Thursday, 16 April at 18:00 [and] Friday, 17 April at 10:30; 14:30 & 18:00 [and] Saturday, 18 April at 10:30
- Full Text:
- Date Issued: 2009
- Authors: Rhodes University
- Date: 2009
- Language: English
- Type: text
- Identifier: vital:8138 , http://hdl.handle.net/10962/d1007250
- Description: Rhodes University Graduation Ceremonies [at] 1820 Settlers National Monument Thursday, 16 April at 18:00 [and] Friday, 17 April at 10:30; 14:30 & 18:00 [and] Saturday, 18 April at 10:30
- Full Text:
- Date Issued: 2009
Rights, duties and remedies under the United Nations Convention on Contracts for the International Sale of Goods: an investigation into the CISG's compatibility with South African law
- Authors: Oosthuizen, Beverley-Claire
- Date: 2009
- Subjects: United Nations Convention on Contracts for the International Sale of Goods (1980) , Sales -- South Africa , Commercial law -- South Africa , South Africa -- Law and legislation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3691 , http://hdl.handle.net/10962/d1003206 , United Nations Convention on Contracts for the International Sale of Goods (1980) , Sales -- South Africa , Commercial law -- South Africa , South Africa -- Law and legislation
- Description: This thesis analyses the compatibility of the United Nations Convention on Contracts for the International Sale of Goods (CISG) with the South African law of sale. An initial examination of the historical development of the CISG reveals its ambitions of becoming the primary source of law governing international contracts of sale. The goal of this research is to determine whether South Africa should ratify the CISG. The CISG has been ratified by most of the leading trading States in the world. In order to gain a better understanding of the advantages and disadvantages of ratification, a comparative study has been undertaken. The stance taken toward the CISG by the United Kingdom and Germany has been examined. The United Kingdom has staunchly avoided ratifying the CISG, despite having agreed thereto a number of years ago. Germany however has taken a different approach and has welcomed the CISG. The experiences of these foreign States serve as a useful guide when assessing the specific challenges that exist in South Africa concerning the adoption of the CISG. The most important aspect of this study is the direct comparison between the legal provisions housed in the CISG and their counterparts under South African law. A careful investigation has been conducted into the rights, duties, and remedies under the CISG. This investigation is followed by an examination of the corresponding rights, duties, and remedies under the South African domestic law of sale. It is evident from these explorations that the rights and duties under the CISG strongly resemble those under South African law. The direct comparison revealed however that certain remedies found in the CISG do not have a counterpart under South African law. Despite this discrepancy, there are no legal principles in the CISG that are completely unknown in South African law. While certain remedies housed in the CISG cannot be found in an identical form under South African law, sufficiently similar legal principles can be found, which frequently lead to the same results as those under the CISG. This study is concluded with a recommendation concerning South Africa’s adoption of the CISG.
- Full Text:
- Date Issued: 2009
- Authors: Oosthuizen, Beverley-Claire
- Date: 2009
- Subjects: United Nations Convention on Contracts for the International Sale of Goods (1980) , Sales -- South Africa , Commercial law -- South Africa , South Africa -- Law and legislation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3691 , http://hdl.handle.net/10962/d1003206 , United Nations Convention on Contracts for the International Sale of Goods (1980) , Sales -- South Africa , Commercial law -- South Africa , South Africa -- Law and legislation
- Description: This thesis analyses the compatibility of the United Nations Convention on Contracts for the International Sale of Goods (CISG) with the South African law of sale. An initial examination of the historical development of the CISG reveals its ambitions of becoming the primary source of law governing international contracts of sale. The goal of this research is to determine whether South Africa should ratify the CISG. The CISG has been ratified by most of the leading trading States in the world. In order to gain a better understanding of the advantages and disadvantages of ratification, a comparative study has been undertaken. The stance taken toward the CISG by the United Kingdom and Germany has been examined. The United Kingdom has staunchly avoided ratifying the CISG, despite having agreed thereto a number of years ago. Germany however has taken a different approach and has welcomed the CISG. The experiences of these foreign States serve as a useful guide when assessing the specific challenges that exist in South Africa concerning the adoption of the CISG. The most important aspect of this study is the direct comparison between the legal provisions housed in the CISG and their counterparts under South African law. A careful investigation has been conducted into the rights, duties, and remedies under the CISG. This investigation is followed by an examination of the corresponding rights, duties, and remedies under the South African domestic law of sale. It is evident from these explorations that the rights and duties under the CISG strongly resemble those under South African law. The direct comparison revealed however that certain remedies found in the CISG do not have a counterpart under South African law. Despite this discrepancy, there are no legal principles in the CISG that are completely unknown in South African law. While certain remedies housed in the CISG cannot be found in an identical form under South African law, sufficiently similar legal principles can be found, which frequently lead to the same results as those under the CISG. This study is concluded with a recommendation concerning South Africa’s adoption of the CISG.
- Full Text:
- Date Issued: 2009
Salinity induced physiological responses in juvenile dusky kob, Argyrosomus japonicus (Sciaenidae)
- Authors: Bernatzeder, Andrea Katinka
- Date: 2009
- Subjects: Osmoregulation , Argyrosomus -- Effects of salt on -- South Africa , Sciaenidae -- Effects of salt on -- South Africa , Argyrosomus -- Physiology , Sciaenidae -- Physiology , Fishes -- Physiology , Biological control systems , Marine ecology -- South Africa , Fishery management -- South Africa , Mariculture -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5318 , http://hdl.handle.net/10962/d1005163 , Osmoregulation , Argyrosomus -- Effects of salt on -- South Africa , Sciaenidae -- Effects of salt on -- South Africa , Argyrosomus -- Physiology , Sciaenidae -- Physiology , Fishes -- Physiology , Biological control systems , Marine ecology -- South Africa , Fishery management -- South Africa , Mariculture -- South Africa
- Description: Fisheries management regulations for dusky kob Argyrosomus japonicus, an important commercial and recreational fisheries species, have failed and the stock is considered collapsed. It is important to take an ecosystems approach to management which includes understanding the effect of environmental factors on recruitment, abundance and distribution. The distribution of early juveniles (20-150 mm TL) in the wild appears to be restricted to the upper reaches of estuaries at salinities below 5 psu. Food availability could not explain the distribution of early juveniles. The aim of this study was to investigate the role of salinity on the distribution of early juvenile dusky kob (<150 mm TL) by examining physiological responses of juveniles exposed to a range of salinities under laboratory conditions. The hypothesis was that the physiological functioning of early juveniles would be optimised at the reduced salinities which they naturally occur at. The objectives of this study were to investigate the effect of salinity on: i) plasma osmolality; ii) growth, food conversion ratio and condition factor; and iii) gill histology with emphasis on chloride cell size and number. A preliminary study was undertaken to determine whether the use of 2-phenoxyethanol had an effect on plasma osmolality. Juveniles pithed prior to blood sampling were used as the control. Plasma osmolality was not affected by exposure or duration of exposure (2, 4, 6, 8, 10 min) to 2-phenoxyethanol. The ability of teleosts to regulate plasma osmolality over a wide range of salinities indicates their degree of ‘physiological euryhalinity’. Plasma osmolality of juveniles exposed to 5, 12 and 35 psu was measured every two weeks over a total of six weeks. Although juveniles were able to regulate plasma osmolality over the duration of the experiment, plasma osmolality at 5 and 12 psu was significantly lower than in fish maintained at 35 psu. Growth is used as an indicator of the relative energy used for osmoregulation at different salinities, as the energy used for osmoregulation becomes unavailable for growth. A nineweek growth experiment was conducted on juveniles exposed to 5, 12 and 35 psu. Juveniles grew and survived at all three salinities. However, growth of juveniles at 5 psu was significantly lower than at 12 and 35 psu. Other than a significantly greater weight gain at 35 psu relative to 12 psu, there was no significant difference in specific growth and length gain between juveniles at 12 and 35 psu. Food conversion ratio and condition factor at 12 and 35 psu were not significantly different, but food conversion ratio and condition factor at 5 psu was significantly greater and lower than at 35 psu respectively. In fish, gills are considered the major organ involved in osmoregulation. Within the gills, chloride cells are the predominant site of ion exchange which is driven by the Na⁺, K⁺- ATPase enzyme. Gill samples of juveniles exposed to 5, 12 and 35 psu for six weeks were examined histologically using light microscopy. Chloride cells of juveniles maintained at 5 psu were significantly more abundant than in juveniles at 12 and 35 psu. Chloride cells of juveniles at 5 psu were significantly larger than in juveniles kept at 12 psu, but not significantly different to those of juveniles kept at 35 psu. The ability of the juvenile fish to regulate plasma osmolality indicates that they are 'physiologically euryhaline', but the reduced growth and proliferation of chloride cells at 5 psu suggests that energy expenditure for osmoregulation is increased at hypoosmotic salinities. Salinity induced physiological responses could therefore not explain the natural distribution of early juvenile dusky kob and it is proposed that other environmental factors (e.g. temperature) are also important. It is also hypothesised that the high conductivity of an estuary in South Africa, to which our understanding is limited, may negate the effect of reduced salinity. Although freshwater input into estuaries is an important factor, further investigations to explain the distribution and abundance of early juveniles is required to make management recommendations. Dusky kob is also becoming an increasingly popular aquaculture species in South Africa. In this regard, early juvenile dusky kob can be grown at salinities as low as 12 psu without negatively affecting growth and production.
- Full Text:
- Date Issued: 2009
- Authors: Bernatzeder, Andrea Katinka
- Date: 2009
- Subjects: Osmoregulation , Argyrosomus -- Effects of salt on -- South Africa , Sciaenidae -- Effects of salt on -- South Africa , Argyrosomus -- Physiology , Sciaenidae -- Physiology , Fishes -- Physiology , Biological control systems , Marine ecology -- South Africa , Fishery management -- South Africa , Mariculture -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5318 , http://hdl.handle.net/10962/d1005163 , Osmoregulation , Argyrosomus -- Effects of salt on -- South Africa , Sciaenidae -- Effects of salt on -- South Africa , Argyrosomus -- Physiology , Sciaenidae -- Physiology , Fishes -- Physiology , Biological control systems , Marine ecology -- South Africa , Fishery management -- South Africa , Mariculture -- South Africa
- Description: Fisheries management regulations for dusky kob Argyrosomus japonicus, an important commercial and recreational fisheries species, have failed and the stock is considered collapsed. It is important to take an ecosystems approach to management which includes understanding the effect of environmental factors on recruitment, abundance and distribution. The distribution of early juveniles (20-150 mm TL) in the wild appears to be restricted to the upper reaches of estuaries at salinities below 5 psu. Food availability could not explain the distribution of early juveniles. The aim of this study was to investigate the role of salinity on the distribution of early juvenile dusky kob (<150 mm TL) by examining physiological responses of juveniles exposed to a range of salinities under laboratory conditions. The hypothesis was that the physiological functioning of early juveniles would be optimised at the reduced salinities which they naturally occur at. The objectives of this study were to investigate the effect of salinity on: i) plasma osmolality; ii) growth, food conversion ratio and condition factor; and iii) gill histology with emphasis on chloride cell size and number. A preliminary study was undertaken to determine whether the use of 2-phenoxyethanol had an effect on plasma osmolality. Juveniles pithed prior to blood sampling were used as the control. Plasma osmolality was not affected by exposure or duration of exposure (2, 4, 6, 8, 10 min) to 2-phenoxyethanol. The ability of teleosts to regulate plasma osmolality over a wide range of salinities indicates their degree of ‘physiological euryhalinity’. Plasma osmolality of juveniles exposed to 5, 12 and 35 psu was measured every two weeks over a total of six weeks. Although juveniles were able to regulate plasma osmolality over the duration of the experiment, plasma osmolality at 5 and 12 psu was significantly lower than in fish maintained at 35 psu. Growth is used as an indicator of the relative energy used for osmoregulation at different salinities, as the energy used for osmoregulation becomes unavailable for growth. A nineweek growth experiment was conducted on juveniles exposed to 5, 12 and 35 psu. Juveniles grew and survived at all three salinities. However, growth of juveniles at 5 psu was significantly lower than at 12 and 35 psu. Other than a significantly greater weight gain at 35 psu relative to 12 psu, there was no significant difference in specific growth and length gain between juveniles at 12 and 35 psu. Food conversion ratio and condition factor at 12 and 35 psu were not significantly different, but food conversion ratio and condition factor at 5 psu was significantly greater and lower than at 35 psu respectively. In fish, gills are considered the major organ involved in osmoregulation. Within the gills, chloride cells are the predominant site of ion exchange which is driven by the Na⁺, K⁺- ATPase enzyme. Gill samples of juveniles exposed to 5, 12 and 35 psu for six weeks were examined histologically using light microscopy. Chloride cells of juveniles maintained at 5 psu were significantly more abundant than in juveniles at 12 and 35 psu. Chloride cells of juveniles at 5 psu were significantly larger than in juveniles kept at 12 psu, but not significantly different to those of juveniles kept at 35 psu. The ability of the juvenile fish to regulate plasma osmolality indicates that they are 'physiologically euryhaline', but the reduced growth and proliferation of chloride cells at 5 psu suggests that energy expenditure for osmoregulation is increased at hypoosmotic salinities. Salinity induced physiological responses could therefore not explain the natural distribution of early juvenile dusky kob and it is proposed that other environmental factors (e.g. temperature) are also important. It is also hypothesised that the high conductivity of an estuary in South Africa, to which our understanding is limited, may negate the effect of reduced salinity. Although freshwater input into estuaries is an important factor, further investigations to explain the distribution and abundance of early juveniles is required to make management recommendations. Dusky kob is also becoming an increasingly popular aquaculture species in South Africa. In this regard, early juvenile dusky kob can be grown at salinities as low as 12 psu without negatively affecting growth and production.
- Full Text:
- Date Issued: 2009
School grounds as a place for environmental learning in the life skills learning programme
- Authors: Mambinja, Sindiswa
- Date: 2009
- Subjects: Environmental education -- Study and teaching (Elementary) -- South Africa --Grahamstown Life skills -- Study and teaching (Elementary) -- South Africa Education -- South Africa -- Curricula Education, Elementary -- South Africa School grounds -- South Africa -- Grahamstown Curriculum-based assessment -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1757 , http://hdl.handle.net/10962/d1003642
- Description: With the intention of improving my own practice, the study investigated how school grounds could be used for environmental learning in the Foundation Phase Life Skill Learning Programme within the Revised National Curriculum Statement. The research was conducted in the Grade One class of Ntaba Maria Primary School situated in Grahamstown East. The study was an action research case study based on interpretive approach to research. It had two cycles comprised of two lesson plans. The first Lesson Plan focused on an audit of the school grounds to identify environmental issues. The second Lesson Plan was informed by the audit, and addressed one of the identified environmental issues. Data was gathered through analysis of curriculum documents, video recordings and photographs of learning interactions, journal entries and learners’ work. The study highlighted that school grounds provided a context for environmental learning within Life Orientation Learning Area especially when integrated with other learning areas. There were cases however, where assessment standards were only partly addressed. The study also revealed that the Life Orientation Learning Area was also limiting for school grounds learning opportunities in some cases. In other cases the study highlighted the open-ended nature of some of its assessment standards. The study also revealed how school grounds related activities offered opportunities and challenges for constructivist, situated and active learning. Opportunities and challenges regarding group work, language use, active engagement with information learning in authentic settings, and action and action competence; emerged as issues from the analysis. Finally, the study shed light on how reflection on learners’ work and assessment of these could help teachers modify activities and do them differently so as to enhance the achievement of skills, knowledge, attitudes and values. The achievement of investigative and problem-solving skills through the two lesson plans was critically evaluated as the processes of values education employed in the lesson implementation.
- Full Text:
- Date Issued: 2009
- Authors: Mambinja, Sindiswa
- Date: 2009
- Subjects: Environmental education -- Study and teaching (Elementary) -- South Africa --Grahamstown Life skills -- Study and teaching (Elementary) -- South Africa Education -- South Africa -- Curricula Education, Elementary -- South Africa School grounds -- South Africa -- Grahamstown Curriculum-based assessment -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1757 , http://hdl.handle.net/10962/d1003642
- Description: With the intention of improving my own practice, the study investigated how school grounds could be used for environmental learning in the Foundation Phase Life Skill Learning Programme within the Revised National Curriculum Statement. The research was conducted in the Grade One class of Ntaba Maria Primary School situated in Grahamstown East. The study was an action research case study based on interpretive approach to research. It had two cycles comprised of two lesson plans. The first Lesson Plan focused on an audit of the school grounds to identify environmental issues. The second Lesson Plan was informed by the audit, and addressed one of the identified environmental issues. Data was gathered through analysis of curriculum documents, video recordings and photographs of learning interactions, journal entries and learners’ work. The study highlighted that school grounds provided a context for environmental learning within Life Orientation Learning Area especially when integrated with other learning areas. There were cases however, where assessment standards were only partly addressed. The study also revealed that the Life Orientation Learning Area was also limiting for school grounds learning opportunities in some cases. In other cases the study highlighted the open-ended nature of some of its assessment standards. The study also revealed how school grounds related activities offered opportunities and challenges for constructivist, situated and active learning. Opportunities and challenges regarding group work, language use, active engagement with information learning in authentic settings, and action and action competence; emerged as issues from the analysis. Finally, the study shed light on how reflection on learners’ work and assessment of these could help teachers modify activities and do them differently so as to enhance the achievement of skills, knowledge, attitudes and values. The achievement of investigative and problem-solving skills through the two lesson plans was critically evaluated as the processes of values education employed in the lesson implementation.
- Full Text:
- Date Issued: 2009
Secondary school learners' perceptions of the value of integrating ICT into the curriculum: an exploratory study in the Grahamstown circuit
- Authors: Mbane, Nombeko Precious
- Date: 2009
- Subjects: Educational technology -- South Africa Information technology -- South Africa Education, Secondary -- Curricula -- South Africa Computer-assisted instruction -- South Africa Educational innovations Information technology -- Study and teaching (Secondary) -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1762 , http://hdl.handle.net/10962/d1003647
- Description: According to the Draft White Paper on e-Education (DoE, 2003), the objective of ICTs in education is to build digital and information literacy so that all learners become confident and competent in using technology to contribute to an innovative and developing South African society. International researchers have acknowledged that little is known about learners’ perceptions of their own learning, but that learners are aware of how technology can be used and have the potential to contribute ideas about ICTs can be used to support their learning. To add to this growing body of research, this study sought to establish secondary school learners’ experiences and perceptions of the value of integrating ICT into the curriculum and the extent to which they believe that ICT is meaningfully integrated into the curriculum. Although some of the schools do not have the necessary ICT infrastructure, this did not preclude the learners from having opinions about the potential benefits and drawbacks of ICT. The findings display the learners’ perceptions on ICT use within the curriculum and how this relates to the available infrastructure in schools.
- Full Text:
- Date Issued: 2009
- Authors: Mbane, Nombeko Precious
- Date: 2009
- Subjects: Educational technology -- South Africa Information technology -- South Africa Education, Secondary -- Curricula -- South Africa Computer-assisted instruction -- South Africa Educational innovations Information technology -- Study and teaching (Secondary) -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1762 , http://hdl.handle.net/10962/d1003647
- Description: According to the Draft White Paper on e-Education (DoE, 2003), the objective of ICTs in education is to build digital and information literacy so that all learners become confident and competent in using technology to contribute to an innovative and developing South African society. International researchers have acknowledged that little is known about learners’ perceptions of their own learning, but that learners are aware of how technology can be used and have the potential to contribute ideas about ICTs can be used to support their learning. To add to this growing body of research, this study sought to establish secondary school learners’ experiences and perceptions of the value of integrating ICT into the curriculum and the extent to which they believe that ICT is meaningfully integrated into the curriculum. Although some of the schools do not have the necessary ICT infrastructure, this did not preclude the learners from having opinions about the potential benefits and drawbacks of ICT. The findings display the learners’ perceptions on ICT use within the curriculum and how this relates to the available infrastructure in schools.
- Full Text:
- Date Issued: 2009
Sending and receiving: immunity sought by diplomats committing criminal offences
- Authors: Moutzouris, Maria
- Date: 2009
- Subjects: Diplomatic privileges and immunities , International crimes , Criminal law , International law
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3686 , http://hdl.handle.net/10962/d1003201 , Diplomatic privileges and immunities , International crimes , Criminal law , International law
- Description: Diplomatic immunity is one of the oldest elements of foreign relations, dating back as far as Ancient Greece and Rome. Today, it is a principle that has been codified into the Vienna Convention on Diplomatic Relations regulating past customs and practices. Consuls and international organizations, although their privileges and immunities are similar to diplomatic personnel, do differ and are regulated by the Vienna Convention on Consular Relations and the United Nations International Immunities respectively. These Conventions have been influenced by past practices and by three theories during different era’s namely exterritoriality, personal representation and functional necessity. The Vienna Convention on Diplomatic Relations further provides certain immunities and privileges to different levels of diplomatic officials, their staff and families. Privileges and immunities will be considered under various main categories, namely the diplomatic mission, the diplomatic official, diplomatic staff, and families. Each category receives privileges and immunities, for example immunities enjoyed by the diplomatic mission include mission correspondence and bags. Diplomatic officials enjoy personal inviolability, immunity from jurisdiction and inviolability of diplomats’ residences and property. The staff and families of diplomatic officials too enjoy privileges and immunities. The problem of so many people receiving privileges and immunities is that there is a high likelihood of abuse. Abuses that arise are various crimes committed by diplomats, their staff and families. They are immune from local punishment and appear to be above the local law. Although the Vienna Convention on Diplomatic Relations provides remedies against diplomats, staff and families who abuse their position, it gives the impression that it is not enough. Various Acts in the United Kingdom, United States and the Republic of South Africa will be analysed in order to ascertain what governments have done to try and curb diplomatic abuses. Each will be considered and found that although they have restricted immunity from previous practices it still places the diplomats’ needs above its own citizens. Thus several suggestions have been put forward and argued whether they are successful in restricting immunity comprehensively. Such suggestions are amending the Vienna Convention on Diplomatic Relations; using the functional necessity theory to further limit immunity; forming bilateral treaties between States as a possible means to restrict or limit; and lastly establishing a Permanent International Diplomatic Criminal Court. The key question to be answered is whether diplomatic immunity is needed for the efficient functioning of foreign relations between States.
- Full Text:
- Date Issued: 2009
- Authors: Moutzouris, Maria
- Date: 2009
- Subjects: Diplomatic privileges and immunities , International crimes , Criminal law , International law
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3686 , http://hdl.handle.net/10962/d1003201 , Diplomatic privileges and immunities , International crimes , Criminal law , International law
- Description: Diplomatic immunity is one of the oldest elements of foreign relations, dating back as far as Ancient Greece and Rome. Today, it is a principle that has been codified into the Vienna Convention on Diplomatic Relations regulating past customs and practices. Consuls and international organizations, although their privileges and immunities are similar to diplomatic personnel, do differ and are regulated by the Vienna Convention on Consular Relations and the United Nations International Immunities respectively. These Conventions have been influenced by past practices and by three theories during different era’s namely exterritoriality, personal representation and functional necessity. The Vienna Convention on Diplomatic Relations further provides certain immunities and privileges to different levels of diplomatic officials, their staff and families. Privileges and immunities will be considered under various main categories, namely the diplomatic mission, the diplomatic official, diplomatic staff, and families. Each category receives privileges and immunities, for example immunities enjoyed by the diplomatic mission include mission correspondence and bags. Diplomatic officials enjoy personal inviolability, immunity from jurisdiction and inviolability of diplomats’ residences and property. The staff and families of diplomatic officials too enjoy privileges and immunities. The problem of so many people receiving privileges and immunities is that there is a high likelihood of abuse. Abuses that arise are various crimes committed by diplomats, their staff and families. They are immune from local punishment and appear to be above the local law. Although the Vienna Convention on Diplomatic Relations provides remedies against diplomats, staff and families who abuse their position, it gives the impression that it is not enough. Various Acts in the United Kingdom, United States and the Republic of South Africa will be analysed in order to ascertain what governments have done to try and curb diplomatic abuses. Each will be considered and found that although they have restricted immunity from previous practices it still places the diplomats’ needs above its own citizens. Thus several suggestions have been put forward and argued whether they are successful in restricting immunity comprehensively. Such suggestions are amending the Vienna Convention on Diplomatic Relations; using the functional necessity theory to further limit immunity; forming bilateral treaties between States as a possible means to restrict or limit; and lastly establishing a Permanent International Diplomatic Criminal Court. The key question to be answered is whether diplomatic immunity is needed for the efficient functioning of foreign relations between States.
- Full Text:
- Date Issued: 2009
Shame is valuable
- Authors: Euvrard, Jonathan George
- Date: 2009
- Subjects: Shame Ethics Self-evaluation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2708 , http://hdl.handle.net/10962/d1002838
- Description: In this thesis I argue that shame is valuable because it contributes to the moral life by promoting coherence. I start by developing and defending a conception of shame. On my conception, rational shame involves a negative self-assessment, in which I am both the assessor and the object of assessment, and in which the standard of assessment is my own. I then develop a notion of coherence, and apply it to the relationship between values, and the relationship between values and actions. I also tie the notion of coherence to what I call “the moral life”. I then discuss two ways in which shame can work to promote coherence. Firstly, I describe a process of critical reflective self-assessment, and show how this is a particularly effective method of promoting coherence when coupled with shame. Secondly, I discuss the connection between my emotions and my values, arguing that this connection promotes coherence, and that shame works to reinforce this connection and thereby to promote coherence.
- Full Text:
- Date Issued: 2009
- Authors: Euvrard, Jonathan George
- Date: 2009
- Subjects: Shame Ethics Self-evaluation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2708 , http://hdl.handle.net/10962/d1002838
- Description: In this thesis I argue that shame is valuable because it contributes to the moral life by promoting coherence. I start by developing and defending a conception of shame. On my conception, rational shame involves a negative self-assessment, in which I am both the assessor and the object of assessment, and in which the standard of assessment is my own. I then develop a notion of coherence, and apply it to the relationship between values, and the relationship between values and actions. I also tie the notion of coherence to what I call “the moral life”. I then discuss two ways in which shame can work to promote coherence. Firstly, I describe a process of critical reflective self-assessment, and show how this is a particularly effective method of promoting coherence when coupled with shame. Secondly, I discuss the connection between my emotions and my values, arguing that this connection promotes coherence, and that shame works to reinforce this connection and thereby to promote coherence.
- Full Text:
- Date Issued: 2009
Social learning processes of HIV/AIDS women caregivers on their use of traditional foods and medicinal plants : the case of Raphael Centre and Keiskamma Art and Health Centre communities of practice, Eastern Cape Province, South Africa
- Authors: Shonhai, Venencia F
- Date: 2009
- Subjects: Keiskamma Art Project (South Africa) , Women caregivers -- South Africa -- Eastern Cape , HIV infections -- Study and teaching -- South Africa , AIDS (Disease) -- Study and teaching -- South Africa , HIV-positive persons -- Care -- South Africa -- Eastern Cape , Medicinal plants -- South Africa , Natural foods -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1768 , http://hdl.handle.net/10962/d1003653
- Description: The scale of people being infected by HIV/AIDS (Human Immunodeficiency Virus /Acquired Immune Deficiency Syndrome) has meant that the family and the community have had to become involved in caring for the sick (Van Dyk, 2005). This has inevitably led to the emergence of informal caregivers in the form of family members caring for their relatives (Kipp, Nkosi, Laing & Jhangri, 2006). The research investigated the social learning of women caregivers looking after people living with HIV/AIDS, with emphasis on caregiving practices related to how they use traditional foods and medicinal plants. The research was undertaken in Grahamstown at the Raphael Centre and in Hamburg at Keiskkamma Health Centre and Art Project, Eastern Cape, South Africa. Data was collected using interviews, focus group discussions and diaries written by participants. The data was analyzed in two phases: the first phase involved reading the interview transcripts and collating the responses into analytical memos that were captured into broad categories, while the second phase made use of the community of practice analytical framework to further analyze the data to get better understanding of the social learning processes. This study reveals that participating in a community of practice like Raphael Centre and Keiskamma Health Centre enables caregivers to learn about caregiving. It also reveals that within these communities of practice there are varied learning processes that take place, such as observational and collaborative learning. The research also revealed that caregivers learn from the communities from which they come, for example caregivers learn about traditional food and medicinal plants which they use from their family members, friends, other caregivers as well as non governmental organizations. The research found that caregivers are influenced in their learning and practices by a number of factors which include their own experiences, ambivalent messages from different stakeholders concerned with fighting HIV/AIDS and exposure to new information. The research recommends that diverse learning processes in a community of practice and outside a community of practice should be encouraged and strengthened. It also recommends that HIV/AIDS caregiving options should be strengthened by drawing on experience and knowledge of caregivers. Caregivers should be encouraged to be selfsustaining to improve their caregiving practices. Stakeholders in the field of HIV/AIDS should be alert to and address ambivalence on use of medicinal plants. Existing programmes that enable women to learn about new information on HIV/AIDS should be strengthened.
- Full Text:
- Date Issued: 2009
- Authors: Shonhai, Venencia F
- Date: 2009
- Subjects: Keiskamma Art Project (South Africa) , Women caregivers -- South Africa -- Eastern Cape , HIV infections -- Study and teaching -- South Africa , AIDS (Disease) -- Study and teaching -- South Africa , HIV-positive persons -- Care -- South Africa -- Eastern Cape , Medicinal plants -- South Africa , Natural foods -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1768 , http://hdl.handle.net/10962/d1003653
- Description: The scale of people being infected by HIV/AIDS (Human Immunodeficiency Virus /Acquired Immune Deficiency Syndrome) has meant that the family and the community have had to become involved in caring for the sick (Van Dyk, 2005). This has inevitably led to the emergence of informal caregivers in the form of family members caring for their relatives (Kipp, Nkosi, Laing & Jhangri, 2006). The research investigated the social learning of women caregivers looking after people living with HIV/AIDS, with emphasis on caregiving practices related to how they use traditional foods and medicinal plants. The research was undertaken in Grahamstown at the Raphael Centre and in Hamburg at Keiskkamma Health Centre and Art Project, Eastern Cape, South Africa. Data was collected using interviews, focus group discussions and diaries written by participants. The data was analyzed in two phases: the first phase involved reading the interview transcripts and collating the responses into analytical memos that were captured into broad categories, while the second phase made use of the community of practice analytical framework to further analyze the data to get better understanding of the social learning processes. This study reveals that participating in a community of practice like Raphael Centre and Keiskamma Health Centre enables caregivers to learn about caregiving. It also reveals that within these communities of practice there are varied learning processes that take place, such as observational and collaborative learning. The research also revealed that caregivers learn from the communities from which they come, for example caregivers learn about traditional food and medicinal plants which they use from their family members, friends, other caregivers as well as non governmental organizations. The research found that caregivers are influenced in their learning and practices by a number of factors which include their own experiences, ambivalent messages from different stakeholders concerned with fighting HIV/AIDS and exposure to new information. The research recommends that diverse learning processes in a community of practice and outside a community of practice should be encouraged and strengthened. It also recommends that HIV/AIDS caregiving options should be strengthened by drawing on experience and knowledge of caregivers. Caregivers should be encouraged to be selfsustaining to improve their caregiving practices. Stakeholders in the field of HIV/AIDS should be alert to and address ambivalence on use of medicinal plants. Existing programmes that enable women to learn about new information on HIV/AIDS should be strengthened.
- Full Text:
- Date Issued: 2009
Social policy, welfare in urban services in South Africa : a case study of free basic water, indigency and citizenship in Eastwood, Pietermaritzburg, KwaZulu-Natal (2005-2007)
- Authors: Smith, Julie
- Date: 2009
- Subjects: Municipal water supply -- South Africa -- Pietermaritzburg , Water-supply -- Social aspects -- South Africa -- Pietermaritzburg , Poor -- South Africa -- Pietermaritzburg , Water-supply -- Economic aspects -- South Africa , South Africa -- Social policy
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:6060 , http://hdl.handle.net/10962/d1015231
- Description: This is an in-depth case study of urban water services to poor households and their interactions with local state power in the community of Eastwood, Pietermaritzburg, in the province of KwaZulu-Natal, South Africa, for the period 2005-2007. It draws especially on the experiences of poor women, exploring the conceptions and implications of the movement of municipal services into the realm of welfare-based urban service concessions. It interrogates what value municipal services, framed in the language and form of welfare but within a commodification milieu and in the context of shifting citizen-state relations offer the state apparatus and how such free basic service offerings are experienced by poor households at the level of domestic, social and economic functioning. The study adopts a fluid mixed-methodological approach to optimise exploration and interpretation. It argues that the interface of state service delivery and citizens is fraught with contradictions: core to this is the nature of state ' help.' Free basic water encompassed in the social wage did not improve the lives of poor households; instead it eroded original water access. Free basic water stole women's time spent on domestic activities; compromised appropriate water requirements, exacerbated service affordability problems and negatively affected household functioning. Poor households experienced the government's policy of free basic services as containment and punishment for being poor. The Indigent Policy activated the state's surveillance, disciplinary and control apparatus. In the absence of effective national regulation over municipalities and with financial shortfalls, street-level bureaucrats manipulated social policies to further municipal cost recovery goals and subjugate poor households. Social control and cheap governance were in symmetry. Citizens, desperate for relief, approached the state. Poor households were pushed into downgraded service packages or mercilessly pursued by municipally outsourced private debt collectors and disconnection companies. Municipalities competing for investments brought about by favourable credit ratings abandoned the humanity of their citizens. Such re-prioritisation of values had profound implications for governance and public trust. Citizens were jettisoned to the outskirts of municipal governance, resulting in a distinct confusion and anger towards the local state - and with it, major uncertainties regarding future stability, redistribution and equity.
- Full Text:
- Date Issued: 2009
- Authors: Smith, Julie
- Date: 2009
- Subjects: Municipal water supply -- South Africa -- Pietermaritzburg , Water-supply -- Social aspects -- South Africa -- Pietermaritzburg , Poor -- South Africa -- Pietermaritzburg , Water-supply -- Economic aspects -- South Africa , South Africa -- Social policy
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:6060 , http://hdl.handle.net/10962/d1015231
- Description: This is an in-depth case study of urban water services to poor households and their interactions with local state power in the community of Eastwood, Pietermaritzburg, in the province of KwaZulu-Natal, South Africa, for the period 2005-2007. It draws especially on the experiences of poor women, exploring the conceptions and implications of the movement of municipal services into the realm of welfare-based urban service concessions. It interrogates what value municipal services, framed in the language and form of welfare but within a commodification milieu and in the context of shifting citizen-state relations offer the state apparatus and how such free basic service offerings are experienced by poor households at the level of domestic, social and economic functioning. The study adopts a fluid mixed-methodological approach to optimise exploration and interpretation. It argues that the interface of state service delivery and citizens is fraught with contradictions: core to this is the nature of state ' help.' Free basic water encompassed in the social wage did not improve the lives of poor households; instead it eroded original water access. Free basic water stole women's time spent on domestic activities; compromised appropriate water requirements, exacerbated service affordability problems and negatively affected household functioning. Poor households experienced the government's policy of free basic services as containment and punishment for being poor. The Indigent Policy activated the state's surveillance, disciplinary and control apparatus. In the absence of effective national regulation over municipalities and with financial shortfalls, street-level bureaucrats manipulated social policies to further municipal cost recovery goals and subjugate poor households. Social control and cheap governance were in symmetry. Citizens, desperate for relief, approached the state. Poor households were pushed into downgraded service packages or mercilessly pursued by municipally outsourced private debt collectors and disconnection companies. Municipalities competing for investments brought about by favourable credit ratings abandoned the humanity of their citizens. Such re-prioritisation of values had profound implications for governance and public trust. Citizens were jettisoned to the outskirts of municipal governance, resulting in a distinct confusion and anger towards the local state - and with it, major uncertainties regarding future stability, redistribution and equity.
- Full Text:
- Date Issued: 2009
Student's van Hiele levels of geometric thought and conception in plane geometry: a collective case study of Nigeria and South Africa
- Authors: Atebe, Humphrey Uyouyo
- Date: 2009
- Subjects: Geometry -- Study and teaching (Secondary) -- Nigeria -- Case studies Geometry -- Study and teaching (Secondary) -- South Africa -- Case studies Mathematics -- Study and teaching (Secondary) -- Nigeria -- Case studies Mathematics -- Study and teaching (Secondary) -- South Africa -- Case studies
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1777 , http://hdl.handle.net/10962/d1003662
- Description: This study is inspired by and utilises the van Hiele theory of geometric thought levels, currently acclaimed as one of the best frameworks for studying teaching and learning processes in geometry. The study aims both to explore and explicate the van Hiele levels of geometric thinking of a selected group of grade 10, 11 and 12 learners in Nigerian and South African schools. The study further aims to provide a rich and indepth description of the geometry instructional practices that possibly contributed to the levels of geometric conceptualisation exhibited by this cohort of high school learners. This collective case study, presented in two volumes, is oriented within an interpretive research paradigm and characterised by both qualitative and quantitative methods. The sample for the study comprised a total of 144 mathematics learners and 6 mathematics teachers from Nigeria and South Africa. They were selected using both purposive and stratified sampling techniques. In using the van Hiele model to interrogate both learners’ levels of geometric conceptualisation and teaching methods in geometry classrooms, the study employs a qualitative and qunatitative approach to the data-collection process, involving the use of questionnaires (in the form of various pen-and-paper tests, hands-on activity-based tests), interviews and classroom videos. Although the data analysis was done largely through descriptive statistics, the whole process inevitably incorporated elements of inferential statistics (e.g. ANOVA and Tukey HSD post-hoc test) in the quest for indepth analysis and deeper interpretation of the data. Learners were assigned to various van Hiele levels, mainly according to Usiskin’s (1982) forced van Hiele level determination scheme. The whole process of analysing the classroom videos involved a consultative panel of 4 observers and 3 critical readers, using the checklist of van Hiele phase descriptors to guide the analysis process. Concerning learners’ levels of geometric conceptualisation, the results from this study reveal that the most of the learners were not yet ready for the formal deductive study of school geometry, as only 2% and 3% of them were respectively at van Hiele levels 3 and 4, while 47%, 22% and 24% were at levels 0, 1 and 2, respectively. More learners from the Nigerian subsample (53%) were at van Hiele level 0 than learners from the South African subsample (41%) at this level. No learner from the Nigerian subsample was at van Hiele level 4, while 6% of the South African learners were at level 4. In general, learners from the Nigerian subsample had a poorer knowledge of school geometry than their peers from the South African subsample, as learners from the latter subsample obtained significantly higher mean scores in the van Hiele Geometry Test (VHGT) and each of the other tests used in this study. Results relating to gender differences in performance generally favour the male learners in this study. For each of the participating schools, learners’ van Hiele levels (as determined by their scores on the VHGT) strongly correlate with their performance in geometry content tests and mathematics generally. For each of the Nigerian and South African subsamples, for n ≤ 2, learners at van Hiele level n obtained higher means on nearly all the tests administered in this study than their peers at level n–1. This finding provides support for the hierarchical property of the van Hiele levels.
- Full Text:
- Date Issued: 2009
- Authors: Atebe, Humphrey Uyouyo
- Date: 2009
- Subjects: Geometry -- Study and teaching (Secondary) -- Nigeria -- Case studies Geometry -- Study and teaching (Secondary) -- South Africa -- Case studies Mathematics -- Study and teaching (Secondary) -- Nigeria -- Case studies Mathematics -- Study and teaching (Secondary) -- South Africa -- Case studies
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1777 , http://hdl.handle.net/10962/d1003662
- Description: This study is inspired by and utilises the van Hiele theory of geometric thought levels, currently acclaimed as one of the best frameworks for studying teaching and learning processes in geometry. The study aims both to explore and explicate the van Hiele levels of geometric thinking of a selected group of grade 10, 11 and 12 learners in Nigerian and South African schools. The study further aims to provide a rich and indepth description of the geometry instructional practices that possibly contributed to the levels of geometric conceptualisation exhibited by this cohort of high school learners. This collective case study, presented in two volumes, is oriented within an interpretive research paradigm and characterised by both qualitative and quantitative methods. The sample for the study comprised a total of 144 mathematics learners and 6 mathematics teachers from Nigeria and South Africa. They were selected using both purposive and stratified sampling techniques. In using the van Hiele model to interrogate both learners’ levels of geometric conceptualisation and teaching methods in geometry classrooms, the study employs a qualitative and qunatitative approach to the data-collection process, involving the use of questionnaires (in the form of various pen-and-paper tests, hands-on activity-based tests), interviews and classroom videos. Although the data analysis was done largely through descriptive statistics, the whole process inevitably incorporated elements of inferential statistics (e.g. ANOVA and Tukey HSD post-hoc test) in the quest for indepth analysis and deeper interpretation of the data. Learners were assigned to various van Hiele levels, mainly according to Usiskin’s (1982) forced van Hiele level determination scheme. The whole process of analysing the classroom videos involved a consultative panel of 4 observers and 3 critical readers, using the checklist of van Hiele phase descriptors to guide the analysis process. Concerning learners’ levels of geometric conceptualisation, the results from this study reveal that the most of the learners were not yet ready for the formal deductive study of school geometry, as only 2% and 3% of them were respectively at van Hiele levels 3 and 4, while 47%, 22% and 24% were at levels 0, 1 and 2, respectively. More learners from the Nigerian subsample (53%) were at van Hiele level 0 than learners from the South African subsample (41%) at this level. No learner from the Nigerian subsample was at van Hiele level 4, while 6% of the South African learners were at level 4. In general, learners from the Nigerian subsample had a poorer knowledge of school geometry than their peers from the South African subsample, as learners from the latter subsample obtained significantly higher mean scores in the van Hiele Geometry Test (VHGT) and each of the other tests used in this study. Results relating to gender differences in performance generally favour the male learners in this study. For each of the participating schools, learners’ van Hiele levels (as determined by their scores on the VHGT) strongly correlate with their performance in geometry content tests and mathematics generally. For each of the Nigerian and South African subsamples, for n ≤ 2, learners at van Hiele level n obtained higher means on nearly all the tests administered in this study than their peers at level n–1. This finding provides support for the hierarchical property of the van Hiele levels.
- Full Text:
- Date Issued: 2009
Student-athletes' attitude formation towards sport or other psychology services
- Wilmot, Gregory Thomas Charlton
- Authors: Wilmot, Gregory Thomas Charlton
- Date: 2009
- Subjects: Sports -- Psychological aspects Attitude (Psychology) Stereotypes (Social psychology) Clinical psychology Athletes -- Counseling of Athletes -- Attitudes
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3086 , http://hdl.handle.net/10962/d1002595
- Description: This qualitative study aims to explore attitude formation within a small sample of Tertiary level student-athletes in relation to their antecedent experiences, individual knowledge about psychology and the social factors impacting on their attitude formation. The study is intended to allow for the development of themes related to the participants’ personal responses to the questions posed to them. The participants’ answers from the interviews will allow for an in-depth analysis and interpretation of the constituents influencing attitude formation towards sport psychology consultation. Primarily, the study aims to explore how attitudes towards clinical and sport psychology practitioners are constructed in this sample. Clinical psychology is used as a contrasting reference point to explore attitude formation in sport psychology. The participants’ beliefs, knowledge sources and attitude toward clinical psychology are examined to understand the fundamental constituents of their attitudes and to understand how this might be related to attitude formation towards sport psychology. It is intended that exploration of the participants’ knowledge sources (e.g. parents, peers, media and coaches) and additional influences on attitudes towards clinical psychology are used to provide insight into how they might shape attitude formation toward sport psychology. This is viewed as particularly important as sport psychology is an increasingly important tool in assisting the enhancement of sporting performance output. This qualitative study uses four elite student-athletes from the same sporting discipline and contextual background to allow for close linkages between the participants’ responses about attitude formation to be made. The study further aims to explore and understand how similarities and differences occur between the participants’ responses which will be completed through analysing and drawing parallels within themes relating to the literature or emerging separately. The Literature Review is intended to help guide the research through providing a reference source for contextualizing individual, public and socially generated beliefs and knowledge (literacy) about mental health / psychology, the constituents of attitude formation and the student-athlete’s context. These factors were identified in the literature as crucial components in attitude formation and also assisted in the development of initial themes, thus guiding the research. Unfortunately, there was limited literature pertaining to attitude formation in relation to sport psychology services and thus provide justification for using clinical psychology to explore attitude formation in sport psychology. This initial exploration of attitude formation in clinical psychology was used as a ‘template’ for contrasting attitude formation in the sample student-athletes as an indication of attitude formation in sport psychology. The Literature Review is viewed as an integral and active component of the study that is used as a body of reference guiding the exploration and interpretation of the emergent themes. This is done through the iterative reference to past research relating to attitude formation, health beliefs, and the numerous sources of information influencing attitude formation within clinical psychology and the student-athlete context. Most importantly, the Literature Review provides a significant base of information that guides the Research Question and the particular factors that have been noted as the most significant to the research. The Literature Review is intended to guide the Research Question and highlight the significant components that need to be taken into consideration in exploring attitude formation. This study, having taken the numerous individual, social, contextual and other factors into consideration, seeks to understand how such factors combine to shape attitudes and influence attitude formation. The collection of literature on social, knowledge and antecedent factors are significant in their role of shaping attitude formation and thus have been included within the Research Question. Furthermore, the Research Question and Literature Review had an impact on the Methodology and why Thematic Analysis was selected. Given the similarities in the participants’ sporting and contextual backgrounds (e.g., being in the same crew, university and social context), it was felt that the primary determinants of attitude formation, within antecedent experiences, knowledge and social influences, would emerge in related themes and thus provide greater insight into attitude formation within the student-athlete context. A limiting factor however, does lie in the small number of participants from a limited diversity of backgrounds, experiences or factors that could assist in allowing broader generalisations of the findings. However, this study aims to understand how the particular factors influence or shape attitudes towards sport and other psychology services and aims to understand the more specific or ‘fundamental’ components of attitude formation that are experienced within the student-athlete’s context and environment.
- Full Text:
- Date Issued: 2009
- Authors: Wilmot, Gregory Thomas Charlton
- Date: 2009
- Subjects: Sports -- Psychological aspects Attitude (Psychology) Stereotypes (Social psychology) Clinical psychology Athletes -- Counseling of Athletes -- Attitudes
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3086 , http://hdl.handle.net/10962/d1002595
- Description: This qualitative study aims to explore attitude formation within a small sample of Tertiary level student-athletes in relation to their antecedent experiences, individual knowledge about psychology and the social factors impacting on their attitude formation. The study is intended to allow for the development of themes related to the participants’ personal responses to the questions posed to them. The participants’ answers from the interviews will allow for an in-depth analysis and interpretation of the constituents influencing attitude formation towards sport psychology consultation. Primarily, the study aims to explore how attitudes towards clinical and sport psychology practitioners are constructed in this sample. Clinical psychology is used as a contrasting reference point to explore attitude formation in sport psychology. The participants’ beliefs, knowledge sources and attitude toward clinical psychology are examined to understand the fundamental constituents of their attitudes and to understand how this might be related to attitude formation towards sport psychology. It is intended that exploration of the participants’ knowledge sources (e.g. parents, peers, media and coaches) and additional influences on attitudes towards clinical psychology are used to provide insight into how they might shape attitude formation toward sport psychology. This is viewed as particularly important as sport psychology is an increasingly important tool in assisting the enhancement of sporting performance output. This qualitative study uses four elite student-athletes from the same sporting discipline and contextual background to allow for close linkages between the participants’ responses about attitude formation to be made. The study further aims to explore and understand how similarities and differences occur between the participants’ responses which will be completed through analysing and drawing parallels within themes relating to the literature or emerging separately. The Literature Review is intended to help guide the research through providing a reference source for contextualizing individual, public and socially generated beliefs and knowledge (literacy) about mental health / psychology, the constituents of attitude formation and the student-athlete’s context. These factors were identified in the literature as crucial components in attitude formation and also assisted in the development of initial themes, thus guiding the research. Unfortunately, there was limited literature pertaining to attitude formation in relation to sport psychology services and thus provide justification for using clinical psychology to explore attitude formation in sport psychology. This initial exploration of attitude formation in clinical psychology was used as a ‘template’ for contrasting attitude formation in the sample student-athletes as an indication of attitude formation in sport psychology. The Literature Review is viewed as an integral and active component of the study that is used as a body of reference guiding the exploration and interpretation of the emergent themes. This is done through the iterative reference to past research relating to attitude formation, health beliefs, and the numerous sources of information influencing attitude formation within clinical psychology and the student-athlete context. Most importantly, the Literature Review provides a significant base of information that guides the Research Question and the particular factors that have been noted as the most significant to the research. The Literature Review is intended to guide the Research Question and highlight the significant components that need to be taken into consideration in exploring attitude formation. This study, having taken the numerous individual, social, contextual and other factors into consideration, seeks to understand how such factors combine to shape attitudes and influence attitude formation. The collection of literature on social, knowledge and antecedent factors are significant in their role of shaping attitude formation and thus have been included within the Research Question. Furthermore, the Research Question and Literature Review had an impact on the Methodology and why Thematic Analysis was selected. Given the similarities in the participants’ sporting and contextual backgrounds (e.g., being in the same crew, university and social context), it was felt that the primary determinants of attitude formation, within antecedent experiences, knowledge and social influences, would emerge in related themes and thus provide greater insight into attitude formation within the student-athlete context. A limiting factor however, does lie in the small number of participants from a limited diversity of backgrounds, experiences or factors that could assist in allowing broader generalisations of the findings. However, this study aims to understand how the particular factors influence or shape attitudes towards sport and other psychology services and aims to understand the more specific or ‘fundamental’ components of attitude formation that are experienced within the student-athlete’s context and environment.
- Full Text:
- Date Issued: 2009
Studies towards the synthesis of novel tridentate ligands for use in ruthenium metathesis catalysts
- Authors: Millward, Tanya
- Date: 2009
- Subjects: Ligands , Catalysis , Metathesis (Chemistry) , Ruthenium , Complex compounds
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4360 , http://hdl.handle.net/10962/d1005025 , Ligands , Catalysis , Metathesis (Chemistry) , Ruthenium , Complex compounds
- Description: This work has focussed on the preparation of a variety of tridentate ligands, designed to form ruthenium complexes as potential metathesis catalysts. Various approaches to the tridentate, malonate-tethered imidazolidine system have been investigated, and a promising route to accessing ligands of this type is discussed. A tridentate malonate-tethered pyridine ligand has been successfully prepared and its dithallium salt has been accessed by hydrolysis with thallium carbonate; approaches to a longer-chain analogue have also been investigated. A thallium pyridine-2,6- dicarboxylate ligand has been has been successfully prepared, as have a range of pyridine diamine ligands, with various alkyl and aromatic substituents on the amine donor atoms. Preliminary investigations into the potential of these compounds as ligands for alkylidene ruthenium complexes are reported using molecular modelling techniques. The geometries and steric energies of the ligands and their corresponding complexes have been analysed, and results obtained from two different software packages are compared. Finally, some preliminary complexation studies have been undertaken.
- Full Text:
- Date Issued: 2009
- Authors: Millward, Tanya
- Date: 2009
- Subjects: Ligands , Catalysis , Metathesis (Chemistry) , Ruthenium , Complex compounds
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4360 , http://hdl.handle.net/10962/d1005025 , Ligands , Catalysis , Metathesis (Chemistry) , Ruthenium , Complex compounds
- Description: This work has focussed on the preparation of a variety of tridentate ligands, designed to form ruthenium complexes as potential metathesis catalysts. Various approaches to the tridentate, malonate-tethered imidazolidine system have been investigated, and a promising route to accessing ligands of this type is discussed. A tridentate malonate-tethered pyridine ligand has been successfully prepared and its dithallium salt has been accessed by hydrolysis with thallium carbonate; approaches to a longer-chain analogue have also been investigated. A thallium pyridine-2,6- dicarboxylate ligand has been has been successfully prepared, as have a range of pyridine diamine ligands, with various alkyl and aromatic substituents on the amine donor atoms. Preliminary investigations into the potential of these compounds as ligands for alkylidene ruthenium complexes are reported using molecular modelling techniques. The geometries and steric energies of the ligands and their corresponding complexes have been analysed, and results obtained from two different software packages are compared. Finally, some preliminary complexation studies have been undertaken.
- Full Text:
- Date Issued: 2009
Synthesis and electrochemistry of octapentylthio phthalocyanine complexes of manganese, titanium and vanadium
- Authors: Mbambisa, Gcineka
- Date: 2009
- Subjects: Electrochemistry , Phthalocyanines -- Synthesis , Manganese , Titanium , Vanadium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4368 , http://hdl.handle.net/10962/d1005033 , Electrochemistry , Phthalocyanines -- Synthesis , Manganese , Titanium , Vanadium
- Description: Synthesis of new thio derivatised Pcs with manganese, titanium and vanadium as a central metal is reported. The complexes synthesised were characterised using spectroscopic and electrochemical means. The complexes displayed interesting spectroscopic properties with absorption of the Q band being observed in the near infrared region. These complexes have unusual colours for MPc complexes, with purple or red colour being observed in solution. Interesting electrochemical properties were observed, with rare observation of the MnIV/MnIII redox couple. There was observation of oxidation peaks for the pentylthio derivatised Pc with titanium as the central metal; this is unusual since for reported thio derivatives based on TiPc, no oxidation was observed. The vanadium based Pc showed an interesting spectrum for the first ring based reduction. The absorption spectrum obtained for the 1st reduction of the vanadium complex using spectroelectrochemistry would normally indicate a metal based process but comparing with literature it was concluded that it is a ring based reduction process. Generally all the MPc complexes formed a well ordered stable monolayer on the gold electrode. Electrocatalytic studies using L-cysteine revealed that the SAM based on manganese (III) octapentylthio phthalocyanine (AcOMnOPTPc) was the most effective since it catalyses L-cysteine at much lower oxidation potentials and it is also much more stable.
- Full Text:
- Date Issued: 2009
- Authors: Mbambisa, Gcineka
- Date: 2009
- Subjects: Electrochemistry , Phthalocyanines -- Synthesis , Manganese , Titanium , Vanadium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4368 , http://hdl.handle.net/10962/d1005033 , Electrochemistry , Phthalocyanines -- Synthesis , Manganese , Titanium , Vanadium
- Description: Synthesis of new thio derivatised Pcs with manganese, titanium and vanadium as a central metal is reported. The complexes synthesised were characterised using spectroscopic and electrochemical means. The complexes displayed interesting spectroscopic properties with absorption of the Q band being observed in the near infrared region. These complexes have unusual colours for MPc complexes, with purple or red colour being observed in solution. Interesting electrochemical properties were observed, with rare observation of the MnIV/MnIII redox couple. There was observation of oxidation peaks for the pentylthio derivatised Pc with titanium as the central metal; this is unusual since for reported thio derivatives based on TiPc, no oxidation was observed. The vanadium based Pc showed an interesting spectrum for the first ring based reduction. The absorption spectrum obtained for the 1st reduction of the vanadium complex using spectroelectrochemistry would normally indicate a metal based process but comparing with literature it was concluded that it is a ring based reduction process. Generally all the MPc complexes formed a well ordered stable monolayer on the gold electrode. Electrocatalytic studies using L-cysteine revealed that the SAM based on manganese (III) octapentylthio phthalocyanine (AcOMnOPTPc) was the most effective since it catalyses L-cysteine at much lower oxidation potentials and it is also much more stable.
- Full Text:
- Date Issued: 2009
Synthesis and photophysical properties of antimony and lead phthalocyanines
- Modibane, Kwena Desmond, Guest
- Authors: Modibane, Kwena Desmond , Guest
- Date: 2009 , 2009-02-27
- Subjects: Phthalocyanines , Photochemistry , Antimony compounds , Lead compounds
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4370 , http://hdl.handle.net/10962/d1005035 , Phthalocyanines , Photochemistry , Antimony compounds , Lead compounds
- Description: This work hereby presents the synthesis, spectroscopic and photophysical properties of newly synthesized lead (PbPc) and antimony (SbPc) phthalocyanines. The complexes are either unsubstituted or substituted at the peripheral and non-peripheral positions with phenoxy, 4-t-butylphenoxy and 4-benzyloxyphenoxy groups. The photophysical properties of these complexes were studied in dimethylsulfoxide, dimethylformamide, toluene, tetrahydrofuran and chloroform as solvents. The fluorescence spectra for PbPc complexes were different to that of the excitation spectra due to demetallation upon excitation. On the other hand, the excitation spectra of oxidized antimony (Sb(V)Pc) derivatives were found to be similar to absorption spectra. High triplet quantum yields for PbPc and SbPc complexes ranging from 0.70 to 0.86, low triplet lifetimes (20–60 μs in DMSO, while they were <10 μs in the rest of the solvents) and low fluorescence quantum yields were observed and is attributed to the presence of heavy atoms (Pb and Sb ions). The nonlinear optical properties of PbPc complexes were studied in dimethylsulfoxide. The optical limiting threshold intensity (Ilim) for the PbPc derivatives were calculated and ranged from 2.1 to 6.8 W/cm2. The photodegradation studies of the PbPc and SbPc complexes synthesized showed that then are stable.
- Full Text:
- Date Issued: 2009
- Authors: Modibane, Kwena Desmond , Guest
- Date: 2009 , 2009-02-27
- Subjects: Phthalocyanines , Photochemistry , Antimony compounds , Lead compounds
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4370 , http://hdl.handle.net/10962/d1005035 , Phthalocyanines , Photochemistry , Antimony compounds , Lead compounds
- Description: This work hereby presents the synthesis, spectroscopic and photophysical properties of newly synthesized lead (PbPc) and antimony (SbPc) phthalocyanines. The complexes are either unsubstituted or substituted at the peripheral and non-peripheral positions with phenoxy, 4-t-butylphenoxy and 4-benzyloxyphenoxy groups. The photophysical properties of these complexes were studied in dimethylsulfoxide, dimethylformamide, toluene, tetrahydrofuran and chloroform as solvents. The fluorescence spectra for PbPc complexes were different to that of the excitation spectra due to demetallation upon excitation. On the other hand, the excitation spectra of oxidized antimony (Sb(V)Pc) derivatives were found to be similar to absorption spectra. High triplet quantum yields for PbPc and SbPc complexes ranging from 0.70 to 0.86, low triplet lifetimes (20–60 μs in DMSO, while they were <10 μs in the rest of the solvents) and low fluorescence quantum yields were observed and is attributed to the presence of heavy atoms (Pb and Sb ions). The nonlinear optical properties of PbPc complexes were studied in dimethylsulfoxide. The optical limiting threshold intensity (Ilim) for the PbPc derivatives were calculated and ranged from 2.1 to 6.8 W/cm2. The photodegradation studies of the PbPc and SbPc complexes synthesized showed that then are stable.
- Full Text:
- Date Issued: 2009
Taking education and training to higher levels
- Authors: Phiri, Aretha
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:7203 , http://hdl.handle.net/10962/d1006400
- Description: Professor Tebello Nyokong of the Chemistry Department has won yet another prestigious award. She was voted "the most influential women in business and government" in the category of education and training, in an event sponsored by CEO Magazine.
- Full Text:
- Date Issued: 2009
- Authors: Phiri, Aretha
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:7203 , http://hdl.handle.net/10962/d1006400
- Description: Professor Tebello Nyokong of the Chemistry Department has won yet another prestigious award. She was voted "the most influential women in business and government" in the category of education and training, in an event sponsored by CEO Magazine.
- Full Text:
- Date Issued: 2009
The ambivalent engagement with Christianity in the writing of nineteenth- and early twentieth-century Africans in the Eastern Cape
- Authors: Nxasana, Thulani Litha
- Date: 2009
- Subjects: Authors, African -- South Africa -- Eastern Cape Authors, South African -- 19th century -- Criticism and interpretation Authors, South African -- 20th century -- Criticism and interpretation Soga, Tiyo, 1829-1871 -- Criticism and interpretation Mqhayi, S. E. K. -- Criticism and interpretation Mgqwetho, Nontsizi -- Criticism and interpretation South African literature -- 19th century -- History and criticism South African literature -- 20th century -- History and criticism Christianity and literature Ambivalence in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2195 , http://hdl.handle.net/10962/d1002237
- Description: Until recently much of the literature recording the nineteenth and early twentieth centuries in the Eastern Cape focused purely on frontier conflict and missionary activity, ignoring the evolving culture of the colonized people. But as Somande Fikeni declares, “[i]t is important when celebrating the country’s heritage to look beyond battle sites, monuments and wars and to pay attention to South Africa’s intellectuals and knowledge producers” (quoted in Hollands 4). This is indeed the central purpose of my research. This thesis seeks to examine the influence of Christianity on early South African writing by Africans and the ambivalence with which Christianity is often treated in their work. In South Africa, as elsewhere in Africa, Christianity played a central role in the development of African literature through the influence of mission schools and printing presses. Thus from the outset the development of written literature was inseparable from the spread of Christianity. Nineteenth- and early twentieth-century writing by Africans reflects this: Christian idioms, biblical stories and images colour their work and yet are not employed unthinkingly. Each of the writers whom I will explore has a complex and at times ambivalent relationship with Christianity, and they use religious discourse for a variety of ends, some of them clearly at odds with their origins in the “civilizing mission” of Europe. According to Yunus Momoniat, “Their works . . . are the beginnings of an engagement not only with the world of words on a page, but also with the politics of literacy itself” (1). The subject of this research is three Xhosa writers from the Eastern Cape: the Reverend Tiyo Soga (1829-1871), the renowned novelist and “National Poet” S. E. K. Mqhayi (1875-1945), and the little-known poet Nontsizi Mgqwetho (Dates uknown, writings 1920-1929), who is described by Mbeki as “the most prolific woman Xhosa poet of the twentieth century” (6). The reason for focusing on the Eastern Cape is because the Xhosa “were the first Bantu people to be exposed to Christian proselytising and to receive a literate education” (Gerard 24). As a result much of the early literature in isiXhosa consisted of translations of the Bible and other Christian tracts, and such “improving” texts as Pilgrim’s Progress. In other words, it is in this work that the first roots of the influence of Christianity in southern Africa can be traced.
- Full Text:
- Date Issued: 2009
- Authors: Nxasana, Thulani Litha
- Date: 2009
- Subjects: Authors, African -- South Africa -- Eastern Cape Authors, South African -- 19th century -- Criticism and interpretation Authors, South African -- 20th century -- Criticism and interpretation Soga, Tiyo, 1829-1871 -- Criticism and interpretation Mqhayi, S. E. K. -- Criticism and interpretation Mgqwetho, Nontsizi -- Criticism and interpretation South African literature -- 19th century -- History and criticism South African literature -- 20th century -- History and criticism Christianity and literature Ambivalence in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2195 , http://hdl.handle.net/10962/d1002237
- Description: Until recently much of the literature recording the nineteenth and early twentieth centuries in the Eastern Cape focused purely on frontier conflict and missionary activity, ignoring the evolving culture of the colonized people. But as Somande Fikeni declares, “[i]t is important when celebrating the country’s heritage to look beyond battle sites, monuments and wars and to pay attention to South Africa’s intellectuals and knowledge producers” (quoted in Hollands 4). This is indeed the central purpose of my research. This thesis seeks to examine the influence of Christianity on early South African writing by Africans and the ambivalence with which Christianity is often treated in their work. In South Africa, as elsewhere in Africa, Christianity played a central role in the development of African literature through the influence of mission schools and printing presses. Thus from the outset the development of written literature was inseparable from the spread of Christianity. Nineteenth- and early twentieth-century writing by Africans reflects this: Christian idioms, biblical stories and images colour their work and yet are not employed unthinkingly. Each of the writers whom I will explore has a complex and at times ambivalent relationship with Christianity, and they use religious discourse for a variety of ends, some of them clearly at odds with their origins in the “civilizing mission” of Europe. According to Yunus Momoniat, “Their works . . . are the beginnings of an engagement not only with the world of words on a page, but also with the politics of literacy itself” (1). The subject of this research is three Xhosa writers from the Eastern Cape: the Reverend Tiyo Soga (1829-1871), the renowned novelist and “National Poet” S. E. K. Mqhayi (1875-1945), and the little-known poet Nontsizi Mgqwetho (Dates uknown, writings 1920-1929), who is described by Mbeki as “the most prolific woman Xhosa poet of the twentieth century” (6). The reason for focusing on the Eastern Cape is because the Xhosa “were the first Bantu people to be exposed to Christian proselytising and to receive a literate education” (Gerard 24). As a result much of the early literature in isiXhosa consisted of translations of the Bible and other Christian tracts, and such “improving” texts as Pilgrim’s Progress. In other words, it is in this work that the first roots of the influence of Christianity in southern Africa can be traced.
- Full Text:
- Date Issued: 2009