'Tell us a new story': a proposal for the transformatory potential of collective memory projects
- Authors: Vincent, Louise
- Date: 2015
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/${Handle} , vital:38046 , ISBN 9781869142902 , https://books.google.co.za/books?id=49o8rgEACAAJanddq=Being+at+home:+Race,+institutional+culture+and+transformation+at+South+African+higher+education+institutionandhl=enandsa=Xandved=0ahUKEwiPgsa6mpjjAhXNN8AKHbNwAtoQ6AEIKDAA
- Description: This edited work has gathered together contributions on how to transform universities in South Africa; as many are struggling to shift their institutional culture. In a South African context, transformation means to attempt to change higher education institutions such that they no longer reflect the values promoted by apartheid but rather reflect the values embodied in South Africa's 1996 Constitution. Institutional culture is the main subject for discussion in this book. In order to transform South Africa's universities, the contributors begin by analyzing the idea of what a university is, and relatedly, what its ideal aims are. A second theme is to understand what institutional culture is and how it functions. Moreover, transformation cannot occur without transforming the broader cultures of which they are a part. Related to this theme is a general concern about how contemporary moves towards the instrumentalization of higher education affect the ability to transform institutions. These institutions are being pushed to conform to goals that are outside the traditional idea of a university, such as concerns that universities are being 'bureaucratized' and becoming corporations, instead of a place of learning open to all. In conclusion it can be said that the contemporary South African academic community has an opportunity to recreate itself as the end of apartheid created space for engaging in transformative epistemic projects. The transformation of the tertiary sector entails a transformation of institutional cultures.
- Full Text:
- Date Issued: 2015
- Authors: Vincent, Louise
- Date: 2015
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/${Handle} , vital:38046 , ISBN 9781869142902 , https://books.google.co.za/books?id=49o8rgEACAAJanddq=Being+at+home:+Race,+institutional+culture+and+transformation+at+South+African+higher+education+institutionandhl=enandsa=Xandved=0ahUKEwiPgsa6mpjjAhXNN8AKHbNwAtoQ6AEIKDAA
- Description: This edited work has gathered together contributions on how to transform universities in South Africa; as many are struggling to shift their institutional culture. In a South African context, transformation means to attempt to change higher education institutions such that they no longer reflect the values promoted by apartheid but rather reflect the values embodied in South Africa's 1996 Constitution. Institutional culture is the main subject for discussion in this book. In order to transform South Africa's universities, the contributors begin by analyzing the idea of what a university is, and relatedly, what its ideal aims are. A second theme is to understand what institutional culture is and how it functions. Moreover, transformation cannot occur without transforming the broader cultures of which they are a part. Related to this theme is a general concern about how contemporary moves towards the instrumentalization of higher education affect the ability to transform institutions. These institutions are being pushed to conform to goals that are outside the traditional idea of a university, such as concerns that universities are being 'bureaucratized' and becoming corporations, instead of a place of learning open to all. In conclusion it can be said that the contemporary South African academic community has an opportunity to recreate itself as the end of apartheid created space for engaging in transformative epistemic projects. The transformation of the tertiary sector entails a transformation of institutional cultures.
- Full Text:
- Date Issued: 2015
(Ferrocenylpyrazolyl) zinc (II) benzoates as catalysts for the ring opening polymerization of ε-caprolactone
- Obuah, Collins, Lochee, Yemanlall, Jordaan, Johan H L, Otto, Daniel P, Nyokong, Tebello, Darkwa, James
- Authors: Obuah, Collins , Lochee, Yemanlall , Jordaan, Johan H L , Otto, Daniel P , Nyokong, Tebello , Darkwa, James
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189515 , vital:44853 , xlink:href="https://doi.org/10.1016/j.poly.2015.02.007"
- Description: The reaction of Zn(OAc)2 and C6H5COOH or 3,5-NO2-C6H3COOH with 3-ferrocenylpyrazolyl-methylenepyridine (L1), 3-ferrocenyl-5-methylpyrazolyl-methylenepyridine (L2), 3-ferrocenylpyrazolyl-ethylamine (L3) and 3-ferrocenyl-5-pyrazolyl-ethylamine (L4) afford the corresponding complexes [Zn(C6H5COO)2(L1)] (1), [Zn(C6H5COO)2(L2)] (2), [Zn(3,5-NO2-C6H3COO)2(L1)] (3), [Zn(3,5-NO2-C6H3 COO)2(L2)] (4), [Zn(C6H5COO)2(L3)] (5), [Zn(C6H5COO)2(L4)] (6), [Zn(3,5-NO2-C6H3COO)2(L3)] (7) and [Zn(3,5-NO2-C6H3COO)2(L4)] (8). These complexes behave as catalysts for the ring opening polymerization of e-caprolactone to produce polymers with molecular weight that range from 1480 to 7080 g mol1 and exhibited moderate to broad PDIs. Evidence of these complexes acting as catalysts was obtained from both the polymerization data and kinetic studies. The polymerization data show that variation of the [CL]/[C] from 100 to 800 produced PCL with relatively the same molecular weight indicative of a catalyst behavior. The appearance of induction period in kinetic plots strengthens the fact that these complexes are catalysts rather than initiators. MALDI-TOF MS and 1 H NMR data show di-hydroxy end groups, which support the coordination mechanism rather than insertion mechanism. To understand the broad PDIs obtained for some of the polymer, the electronic properties of the zinc complexes were investigated using cyclic voltammetry. The results show that the zinc complexes containing amine based ligands are highly electrophilic therefore making them unstable, hence the broad PDIs observed for zinc complexes containing amine based ligands. Among the eight complexes investigated, complex 7 is the most active catalyst with kp value of 1.18 107 h1 mol1 at 110 C.
- Full Text:
- Date Issued: 2015
- Authors: Obuah, Collins , Lochee, Yemanlall , Jordaan, Johan H L , Otto, Daniel P , Nyokong, Tebello , Darkwa, James
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189515 , vital:44853 , xlink:href="https://doi.org/10.1016/j.poly.2015.02.007"
- Description: The reaction of Zn(OAc)2 and C6H5COOH or 3,5-NO2-C6H3COOH with 3-ferrocenylpyrazolyl-methylenepyridine (L1), 3-ferrocenyl-5-methylpyrazolyl-methylenepyridine (L2), 3-ferrocenylpyrazolyl-ethylamine (L3) and 3-ferrocenyl-5-pyrazolyl-ethylamine (L4) afford the corresponding complexes [Zn(C6H5COO)2(L1)] (1), [Zn(C6H5COO)2(L2)] (2), [Zn(3,5-NO2-C6H3COO)2(L1)] (3), [Zn(3,5-NO2-C6H3 COO)2(L2)] (4), [Zn(C6H5COO)2(L3)] (5), [Zn(C6H5COO)2(L4)] (6), [Zn(3,5-NO2-C6H3COO)2(L3)] (7) and [Zn(3,5-NO2-C6H3COO)2(L4)] (8). These complexes behave as catalysts for the ring opening polymerization of e-caprolactone to produce polymers with molecular weight that range from 1480 to 7080 g mol1 and exhibited moderate to broad PDIs. Evidence of these complexes acting as catalysts was obtained from both the polymerization data and kinetic studies. The polymerization data show that variation of the [CL]/[C] from 100 to 800 produced PCL with relatively the same molecular weight indicative of a catalyst behavior. The appearance of induction period in kinetic plots strengthens the fact that these complexes are catalysts rather than initiators. MALDI-TOF MS and 1 H NMR data show di-hydroxy end groups, which support the coordination mechanism rather than insertion mechanism. To understand the broad PDIs obtained for some of the polymer, the electronic properties of the zinc complexes were investigated using cyclic voltammetry. The results show that the zinc complexes containing amine based ligands are highly electrophilic therefore making them unstable, hence the broad PDIs observed for zinc complexes containing amine based ligands. Among the eight complexes investigated, complex 7 is the most active catalyst with kp value of 1.18 107 h1 mol1 at 110 C.
- Full Text:
- Date Issued: 2015
(Un)stable architecture as deconstructed meaning
- Authors: Lombard, Lindi
- Date: 2015
- Subjects: Art and architecture , Architecture in art , Proportion (Art) , Vertigo in art , Deconstructivism (Architecture)
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: http://hdl.handle.net/10962/5825 , vital:20980
- Description: How often do we notice the buildings that we work in, play in and live in? The architecture that we construct is specially geared to our human proportions, and shelters and accommodates us. It can be seen as a metaphor for the body, the self, and systems of social control that we have created. When the structure of this architecture is compromised, either literally or metaphorically, we experience instability and vertigo. My practical submission, Vertigo is concerned with architecture, perspective, deconstruction, instability, vertigo, scale and the body. Vertigo consists of paintings, ranging in scale from the size of a brick to the height of a single storey house. Utilizing a highly representational style as well as working with abstract sign systems and technical plan drawings, I destabilize firstly, our sense of certainty in the architecture that surrounds us, and secondly, prompts us to question the assumed fixity of ourselves and our social systems, through the convergence and collision of architecture and painting. This supporting document, (Un)stable Architecture as Deconstructed Meaning, considers the key conceptual concerns informing my practical submission. In chapter one of this mini-thesis: Deconstructivist Architecture, Instability and Impermanence I look at Deconstructivist Architecture which challenges traditional values of order, stability, harmony and unity of architecture. I position my work in relation to architecture projects on the Deconstructivist Architecture show in relation to their intent of undoing, shifting and destabilizing structure and what architecture is traditionally valued for. I also look at the shifting meaning and symbolism of architecture and skyscrapers. In the second chapter: Vertiginous Point of View and Shifted Perspectives I engage with vertigo, perspective, scale and the bodily analogy in architecture. I look at how Julie Mehretu destabilises built space and architecture in a painterly way, depicting multiple perspectives which are subjected to multiple interpretations. In chapter Three: Painting a Building and Building a Painting: Process, Scale and the Body, I discuss and engage with my practical submission, Vertigo, in relation to my process, scale, the body, vertigo, deconstruction, instability and perspective.
- Full Text:
- Date Issued: 2015
- Authors: Lombard, Lindi
- Date: 2015
- Subjects: Art and architecture , Architecture in art , Proportion (Art) , Vertigo in art , Deconstructivism (Architecture)
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: http://hdl.handle.net/10962/5825 , vital:20980
- Description: How often do we notice the buildings that we work in, play in and live in? The architecture that we construct is specially geared to our human proportions, and shelters and accommodates us. It can be seen as a metaphor for the body, the self, and systems of social control that we have created. When the structure of this architecture is compromised, either literally or metaphorically, we experience instability and vertigo. My practical submission, Vertigo is concerned with architecture, perspective, deconstruction, instability, vertigo, scale and the body. Vertigo consists of paintings, ranging in scale from the size of a brick to the height of a single storey house. Utilizing a highly representational style as well as working with abstract sign systems and technical plan drawings, I destabilize firstly, our sense of certainty in the architecture that surrounds us, and secondly, prompts us to question the assumed fixity of ourselves and our social systems, through the convergence and collision of architecture and painting. This supporting document, (Un)stable Architecture as Deconstructed Meaning, considers the key conceptual concerns informing my practical submission. In chapter one of this mini-thesis: Deconstructivist Architecture, Instability and Impermanence I look at Deconstructivist Architecture which challenges traditional values of order, stability, harmony and unity of architecture. I position my work in relation to architecture projects on the Deconstructivist Architecture show in relation to their intent of undoing, shifting and destabilizing structure and what architecture is traditionally valued for. I also look at the shifting meaning and symbolism of architecture and skyscrapers. In the second chapter: Vertiginous Point of View and Shifted Perspectives I engage with vertigo, perspective, scale and the bodily analogy in architecture. I look at how Julie Mehretu destabilises built space and architecture in a painterly way, depicting multiple perspectives which are subjected to multiple interpretations. In chapter Three: Painting a Building and Building a Painting: Process, Scale and the Body, I discuss and engage with my practical submission, Vertigo, in relation to my process, scale, the body, vertigo, deconstruction, instability and perspective.
- Full Text:
- Date Issued: 2015
A best practice guideline for evidence based teaching strategies for nurse educators
- Authors: Breytenbach, Cecile
- Date: 2015
- Subjects: Nursing -- Study and teaching -- Great Britain , Nurse educators , Evidence-based nursing
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/4831 , vital:20699
- Description: Evidence based practice (EBP) is a worldwide phenomena defined as the “conscientious explicit and judicious use of current best evidence in making decisions about the patient’s care”. The evidence based practice concept’s aim is to effectively guide health care professionals to build knowledge that will be supported by evidence. Evidence based practice must be supported by evidence based teaching. Nurse educators must be up to date with evidence based teaching as well as the latest evidence based teaching strategies, in order to teach the new millennial nursing students and for the new qualifications structure. Teaching the concept of evidence based practice by implementing evidence based teaching to nursing students will enable them to transform the future of healthcare by delivering high quality care practice. A paucity of evidence is available on evidence based teaching and teaching strategies in the South African context. Therefore the researcher used a systematic review methodology to explore and describe the best available evidence based teaching strategies and to develop a guideline on evidence based teaching strategies for nurse educators. The data bases searched included: MEDLINE, CINAHL, PubMed and Google Scholar. Manual searches were done and completed with the assistance of librarians. A total number of n=50 studies were identified as potentially relevant to the study. The number or articles included for critical appraisal were 20. On completion of the critical appraisal n=17 articles were identified for the review. The included studies for the review were n=7 Level 1, systematic reviews and n=10 Level 2, quasi-experimental studies. Three studies were excluded after critical appraisal from two reviewers, appraisal was done independently, and consensuses were reached between the two reviewers. The Joanna Briggs Institutes critical appraisal and data extraction instruments were used for the study. The descriptive data synthesis was done of the included studies as well as a comparison of teaching strategies to determine which one to better than the other one. Although n = 4 of the teaching strategies (concept mapping, internet-based learning, evidence based interactive strategy and cultural competence) significantly increased knowledge, the overall results found that a variety of teaching strategies to be implemented to increase the knowledge outcomes of the nursing students. The different teaching strategies found were: e-learning, concept mapping, internet-based learning, web-based learning, gaming, problem-based learning, and case studies, evidence based learning and cultural competence. However, more research is needed to investigate the best use of the different teaching strategies and compare the impact of a variety of teaching strategies on increasing knowledge of the nursing student.
- Full Text:
- Date Issued: 2015
- Authors: Breytenbach, Cecile
- Date: 2015
- Subjects: Nursing -- Study and teaching -- Great Britain , Nurse educators , Evidence-based nursing
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/4831 , vital:20699
- Description: Evidence based practice (EBP) is a worldwide phenomena defined as the “conscientious explicit and judicious use of current best evidence in making decisions about the patient’s care”. The evidence based practice concept’s aim is to effectively guide health care professionals to build knowledge that will be supported by evidence. Evidence based practice must be supported by evidence based teaching. Nurse educators must be up to date with evidence based teaching as well as the latest evidence based teaching strategies, in order to teach the new millennial nursing students and for the new qualifications structure. Teaching the concept of evidence based practice by implementing evidence based teaching to nursing students will enable them to transform the future of healthcare by delivering high quality care practice. A paucity of evidence is available on evidence based teaching and teaching strategies in the South African context. Therefore the researcher used a systematic review methodology to explore and describe the best available evidence based teaching strategies and to develop a guideline on evidence based teaching strategies for nurse educators. The data bases searched included: MEDLINE, CINAHL, PubMed and Google Scholar. Manual searches were done and completed with the assistance of librarians. A total number of n=50 studies were identified as potentially relevant to the study. The number or articles included for critical appraisal were 20. On completion of the critical appraisal n=17 articles were identified for the review. The included studies for the review were n=7 Level 1, systematic reviews and n=10 Level 2, quasi-experimental studies. Three studies were excluded after critical appraisal from two reviewers, appraisal was done independently, and consensuses were reached between the two reviewers. The Joanna Briggs Institutes critical appraisal and data extraction instruments were used for the study. The descriptive data synthesis was done of the included studies as well as a comparison of teaching strategies to determine which one to better than the other one. Although n = 4 of the teaching strategies (concept mapping, internet-based learning, evidence based interactive strategy and cultural competence) significantly increased knowledge, the overall results found that a variety of teaching strategies to be implemented to increase the knowledge outcomes of the nursing students. The different teaching strategies found were: e-learning, concept mapping, internet-based learning, web-based learning, gaming, problem-based learning, and case studies, evidence based learning and cultural competence. However, more research is needed to investigate the best use of the different teaching strategies and compare the impact of a variety of teaching strategies on increasing knowledge of the nursing student.
- Full Text:
- Date Issued: 2015
A business model for medical subspecialty training in South Africa
- Dalmeyer, Johannes Paulus Franciscus
- Authors: Dalmeyer, Johannes Paulus Franciscus
- Date: 2015
- Subjects: Health care teams -- Training of -- South Africa , Medical care -- Needs assessment -- South Africa , Evidence-based medicine -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/3508 , vital:20437
- Description: The shortage of healthcare workers and doctors in the developing world compared to the developed world is a problem, and will continue to be so, due to the continual migration of qualified professionals and the inability of the state to remedy these shortfalls. A shortage of healthcare workers and specialist doctors will seriously hamper the Government’s National Health Insurance (NHI) plan, as well as the sustainability of the private health care sector. In addition, the duration of medical training in South Africa is exceptionally long. The three major hospital groups and other private corporates have over the last number of years taken limited initiative to fund education projects in conjunction with the academic institutions. However, these projects have been poorly focused and have been managed in an unstructured and detached manner. There is a desire from the private sector to get involved in these projects on a much larger scale through more formalised structures. Given this background, the primary objective of this research is to develop a business model for medical subspecialty training to complement the current academic subspecialty training in South Africa. A trial model for training subspecialists in reproductive medicine was developed as a first attempt to address the threatening shortages and training duration. This trial programme is the basis of this research. A two-phased process was used in collecting data. In Phase 1 data was collected from stakeholder groups. The results of this survey assisted in generating variables to include in the measuring instrument for the survey in Phase 2. In Phase 2 the perceptions and expectations of sub-specialists (reproductive subspecialists and cardiologists) regarding sub-specialty training was collected. The results of the demographic variables confirm the aging profile of subspecialist and the need to ensure succession. The results further showed that cardiologists and reproductive subspecialist expectations of the training of subspecialists are very similar except for their expectations on the training duration. Reproductive subspecialist respondents agreed more than cardiology subspecialist respondents that the training duration is too long. The biggest gap between perceptions and expectations is also with the factor training. The results showed that the expectations of subspecialists are not met for training. From these results a business model for the training of medical subspecialists is proposed. This proposed business model can play a complementary role to the existing state controlled system and form the bases of Public Private Partnerships (PPP) in medical training. This proposed business model will fit a developing country were the focus is on primary healthcare, with financial and capacity constraints. The proposed model would require role players to bring about change to accommodate a larger scale Public Private Partnership (PPP) to ensure the implementation of the model. The proposed decentralised business model for training subspecialists would allow the trainee subspecialist to practise as a specialist thus maintaining an acceptable income, and enable an expedited completion and lead to a wider dissemination of medical expertise that can be delivered in a wider national foot print. It further will provide for a structured Public Private Partnership.
- Full Text:
- Date Issued: 2015
- Authors: Dalmeyer, Johannes Paulus Franciscus
- Date: 2015
- Subjects: Health care teams -- Training of -- South Africa , Medical care -- Needs assessment -- South Africa , Evidence-based medicine -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/3508 , vital:20437
- Description: The shortage of healthcare workers and doctors in the developing world compared to the developed world is a problem, and will continue to be so, due to the continual migration of qualified professionals and the inability of the state to remedy these shortfalls. A shortage of healthcare workers and specialist doctors will seriously hamper the Government’s National Health Insurance (NHI) plan, as well as the sustainability of the private health care sector. In addition, the duration of medical training in South Africa is exceptionally long. The three major hospital groups and other private corporates have over the last number of years taken limited initiative to fund education projects in conjunction with the academic institutions. However, these projects have been poorly focused and have been managed in an unstructured and detached manner. There is a desire from the private sector to get involved in these projects on a much larger scale through more formalised structures. Given this background, the primary objective of this research is to develop a business model for medical subspecialty training to complement the current academic subspecialty training in South Africa. A trial model for training subspecialists in reproductive medicine was developed as a first attempt to address the threatening shortages and training duration. This trial programme is the basis of this research. A two-phased process was used in collecting data. In Phase 1 data was collected from stakeholder groups. The results of this survey assisted in generating variables to include in the measuring instrument for the survey in Phase 2. In Phase 2 the perceptions and expectations of sub-specialists (reproductive subspecialists and cardiologists) regarding sub-specialty training was collected. The results of the demographic variables confirm the aging profile of subspecialist and the need to ensure succession. The results further showed that cardiologists and reproductive subspecialist expectations of the training of subspecialists are very similar except for their expectations on the training duration. Reproductive subspecialist respondents agreed more than cardiology subspecialist respondents that the training duration is too long. The biggest gap between perceptions and expectations is also with the factor training. The results showed that the expectations of subspecialists are not met for training. From these results a business model for the training of medical subspecialists is proposed. This proposed business model can play a complementary role to the existing state controlled system and form the bases of Public Private Partnerships (PPP) in medical training. This proposed business model will fit a developing country were the focus is on primary healthcare, with financial and capacity constraints. The proposed model would require role players to bring about change to accommodate a larger scale Public Private Partnership (PPP) to ensure the implementation of the model. The proposed decentralised business model for training subspecialists would allow the trainee subspecialist to practise as a specialist thus maintaining an acceptable income, and enable an expedited completion and lead to a wider dissemination of medical expertise that can be delivered in a wider national foot print. It further will provide for a structured Public Private Partnership.
- Full Text:
- Date Issued: 2015
A case study of organisational change in an employee wellness company and its effects on job satisfaction and organisational climate
- Authors: Kassiem, Wahib
- Date: 2015
- Subjects: Organizational change -- South Africa -- Case studies
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:844 , http://hdl.handle.net/10962/d1016404
- Description: The modern era has brought the phenomenon of organisational change closer to the average person. With the recent financial crisis placing more strain on businesses, organisations are always under pressure to review their business models in order to deliver a sustainable operational model and as result, hopefully a sustainable competitive advantage. In order to remain competitive, the leadership team has to constantly seek ways of differentiating their organisations from others with similar product offerings. When these changes are initiated, there is no doubt that the leadership gave extensive thought prior to execution. However, their motives are not always clear to their most important constitution, their employees. Often when these changes are implemented, employees believe that they’ve been left out of the decision making process. Furthermore, post change review with employees are also not given enough thought and are often not done. This research used qualitative research methods to establish how employees experience job satisfaction and organisational climate subsequent to changes that transpired within their work environment. Semi-structured interviews and document analysis were used to collect data. The interviews were constructed by expanding upon well-documented quantitative dimensions of these behavioural variables. Questions were developed focusing on these dimensions in line with the changes experienced. The sample consisted of nine employees at an employee wellness organisation in Roodepoort, Gauteng. There is evidence to show that in this short period of two years (May 2012 to June 2014), by implementing various changes, the new leadership has improved the financial viability of the organisation. However, insights from the interviews point to a number of areas where the leadership and management structures have to exert more effort. Communication processes have to be reviewed, especially to lower levels. As there exists limited opportunities for promotion, investigations into expanding existing roles, again at the lower levels may assist in raising job satisfaction levels. Employees felt that support structures are severely lacking when significant changes affecting them are implemented. A climate for innovation and risk taking has to be considered which, if instituted, could aid the organisation in setting the pace for the organisational wellness industry. The structure adopted for this research consists of three sections. Section one follows the evaluation report format, with the literature review and research methodology sections following thereafter. By making use of established literature as a basis, the findings and recommendations are therefore not exclusively applicable to this organisation. Hence other organisations intending similar change initiatives could benefit from this research.
- Full Text:
- Date Issued: 2015
- Authors: Kassiem, Wahib
- Date: 2015
- Subjects: Organizational change -- South Africa -- Case studies
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:844 , http://hdl.handle.net/10962/d1016404
- Description: The modern era has brought the phenomenon of organisational change closer to the average person. With the recent financial crisis placing more strain on businesses, organisations are always under pressure to review their business models in order to deliver a sustainable operational model and as result, hopefully a sustainable competitive advantage. In order to remain competitive, the leadership team has to constantly seek ways of differentiating their organisations from others with similar product offerings. When these changes are initiated, there is no doubt that the leadership gave extensive thought prior to execution. However, their motives are not always clear to their most important constitution, their employees. Often when these changes are implemented, employees believe that they’ve been left out of the decision making process. Furthermore, post change review with employees are also not given enough thought and are often not done. This research used qualitative research methods to establish how employees experience job satisfaction and organisational climate subsequent to changes that transpired within their work environment. Semi-structured interviews and document analysis were used to collect data. The interviews were constructed by expanding upon well-documented quantitative dimensions of these behavioural variables. Questions were developed focusing on these dimensions in line with the changes experienced. The sample consisted of nine employees at an employee wellness organisation in Roodepoort, Gauteng. There is evidence to show that in this short period of two years (May 2012 to June 2014), by implementing various changes, the new leadership has improved the financial viability of the organisation. However, insights from the interviews point to a number of areas where the leadership and management structures have to exert more effort. Communication processes have to be reviewed, especially to lower levels. As there exists limited opportunities for promotion, investigations into expanding existing roles, again at the lower levels may assist in raising job satisfaction levels. Employees felt that support structures are severely lacking when significant changes affecting them are implemented. A climate for innovation and risk taking has to be considered which, if instituted, could aid the organisation in setting the pace for the organisational wellness industry. The structure adopted for this research consists of three sections. Section one follows the evaluation report format, with the literature review and research methodology sections following thereafter. By making use of established literature as a basis, the findings and recommendations are therefore not exclusively applicable to this organisation. Hence other organisations intending similar change initiatives could benefit from this research.
- Full Text:
- Date Issued: 2015
A case study of Siemens Afghanistan : building a country, building a company
- Authors: Qaleej, Raaz Hassan
- Date: 2015
- Subjects: Siemens Aktiengesellschaft , Corporate culture -- Afghanistan , Employees -- Attitudes , Industrial relations -- Afghanistan
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:854 , http://hdl.handle.net/10962/d1017522
- Description: This case study was written within the broader concept of Organisational Culture and how it is integrated into an organisation to encourage responsible leadership. The core focus and emphasis of this approach is to establish the implications for businesses operating in the most challenging of commercial environments, while adhering to their corporate ethos and organisational values. These may be summarised with the phrase: Only a clean business is a sustainable business. This dissertation is intended to act as a case study and resource aide for the teaching of leadership, organisational behaviour, human resources and business sustainability. The study is about the Afghanistan chapter of the global giant Siemens, which has been working in many areas of specialisation conducting business in the country for more than 75 years. It has been selected for this case study because of its long-term impressive record, during which time it has developed and sustained a reputation as an organisation with a much-admired organisational culture, and one to which employees feel very closely attached and connected. This case study evolved from a set of unique as well as difficult circumstances. In Afghanistan, where infrastructure is weak, businesses and other structured organisations are in their initial and immature stages of development, and employee attachment to their workplaces is relatively weak. In the case of Siemens however, it has been much the opposite. It became apparent over a protracted period of time that the relationship of employees to the company was clearly of a positive and committed nature, unlike the general perception stemming from other multinational organisations operating within the country. Many business organisations in Afghanistan tend to emphasise to a lesser degree some modern-day practices of employer-employee relationships, which negatively affect motivation and commitment. The study grew out of the observations that employees of Siemens on the other hand, seemed to exhibit attitudes and commitments contrary to the general trend in the wider business sector. This project began with the intention to identify those factors contributing to employee loyalty and strong attachments to an organisation. Subsequently, the same findings were used to identify the traits and particular features working within the organisational environment.
- Full Text:
- Date Issued: 2015
- Authors: Qaleej, Raaz Hassan
- Date: 2015
- Subjects: Siemens Aktiengesellschaft , Corporate culture -- Afghanistan , Employees -- Attitudes , Industrial relations -- Afghanistan
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:854 , http://hdl.handle.net/10962/d1017522
- Description: This case study was written within the broader concept of Organisational Culture and how it is integrated into an organisation to encourage responsible leadership. The core focus and emphasis of this approach is to establish the implications for businesses operating in the most challenging of commercial environments, while adhering to their corporate ethos and organisational values. These may be summarised with the phrase: Only a clean business is a sustainable business. This dissertation is intended to act as a case study and resource aide for the teaching of leadership, organisational behaviour, human resources and business sustainability. The study is about the Afghanistan chapter of the global giant Siemens, which has been working in many areas of specialisation conducting business in the country for more than 75 years. It has been selected for this case study because of its long-term impressive record, during which time it has developed and sustained a reputation as an organisation with a much-admired organisational culture, and one to which employees feel very closely attached and connected. This case study evolved from a set of unique as well as difficult circumstances. In Afghanistan, where infrastructure is weak, businesses and other structured organisations are in their initial and immature stages of development, and employee attachment to their workplaces is relatively weak. In the case of Siemens however, it has been much the opposite. It became apparent over a protracted period of time that the relationship of employees to the company was clearly of a positive and committed nature, unlike the general perception stemming from other multinational organisations operating within the country. Many business organisations in Afghanistan tend to emphasise to a lesser degree some modern-day practices of employer-employee relationships, which negatively affect motivation and commitment. The study grew out of the observations that employees of Siemens on the other hand, seemed to exhibit attitudes and commitments contrary to the general trend in the wider business sector. This project began with the intention to identify those factors contributing to employee loyalty and strong attachments to an organisation. Subsequently, the same findings were used to identify the traits and particular features working within the organisational environment.
- Full Text:
- Date Issued: 2015
A Case study of students' first additional language reading and response in the faculty of education at the University of Fort Hare: Eastern Cape
- Authors: Linake, Manthekeleng A
- Date: 2015
- Subjects: Language and education Language and languages -- Study and teaching -- South Africa --Eastern Cape English language -- Study and teaching -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Degree
- Identifier: http://hdl.handle.net/10353/5851 , vital:29402
- Description: Although reading ability alone cannot guarantee academic success, it is highly likely that a lack of reading can function as a key barrier to academic achievement. There are many other factors that are part of the causality. Of these, socio-economic status, teaching methods, parental involvement and lack of exposure to LoLT are probably the most important. Classroom teaching for reading instruction needs to be considered as the critical factor in preventing reading problems and must be the central focus for change. As such, teachers’ acquisition of the teaching skills necessary to bring about the development of literate language competency are critical especially in South Africa where many assumptions have been largely unquestioned about how to teach reading and writing, which languages to use and what counts as high quality practice in classrooms (Banda, 2000). The main aim of the study was to investigate principally reading with the use of English first additional language (FAL) in South African Universities. The objectives included enabling students to successfully learn reading in order to promote their’ reading to such a level that they can continue reading to learn and not learning to read. The researcher was particularly interested in exploring broader trends in reading strategies, instructions and training for students with the intention of contributing possible strategies to address the training of students for their role as literacy instructors in English as well as in multilingual education in South Africa. Methodologically, the study is premised within the interpretivist paradigm based on a qualitative research method. It is a case study design. It is a longitudinal study that covered a total of four years, the duration for a B Ed degree. The population comprises all forth year English teaching methods class and ten lecturers in the programme. The data collection tools included documents, participant observation, journal entry, assessments and focus groups. Interviews were granted to a purposively selected number of students (9) based on their academic performance over the years. There were three weak, three medium and three strong students that were interviewed. A total of 10 teachers were randomly selected from the Faculty to get their input about students’ reading. The ages of the respondents ranged from 18-60. The study concluded that students prefer to be taught in English although most see it as a barrier to learning. The findings showed that language learning can be easier if it is considered as social practice with academic purpose. The researcher recommends that there is need for a reduction of administrative duties from the lecturers to create more time for consultation. She or he also see a need for tutorials which can help to expose learners even more to interaction in EFAL.
- Full Text:
- Date Issued: 2015
- Authors: Linake, Manthekeleng A
- Date: 2015
- Subjects: Language and education Language and languages -- Study and teaching -- South Africa --Eastern Cape English language -- Study and teaching -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Degree
- Identifier: http://hdl.handle.net/10353/5851 , vital:29402
- Description: Although reading ability alone cannot guarantee academic success, it is highly likely that a lack of reading can function as a key barrier to academic achievement. There are many other factors that are part of the causality. Of these, socio-economic status, teaching methods, parental involvement and lack of exposure to LoLT are probably the most important. Classroom teaching for reading instruction needs to be considered as the critical factor in preventing reading problems and must be the central focus for change. As such, teachers’ acquisition of the teaching skills necessary to bring about the development of literate language competency are critical especially in South Africa where many assumptions have been largely unquestioned about how to teach reading and writing, which languages to use and what counts as high quality practice in classrooms (Banda, 2000). The main aim of the study was to investigate principally reading with the use of English first additional language (FAL) in South African Universities. The objectives included enabling students to successfully learn reading in order to promote their’ reading to such a level that they can continue reading to learn and not learning to read. The researcher was particularly interested in exploring broader trends in reading strategies, instructions and training for students with the intention of contributing possible strategies to address the training of students for their role as literacy instructors in English as well as in multilingual education in South Africa. Methodologically, the study is premised within the interpretivist paradigm based on a qualitative research method. It is a case study design. It is a longitudinal study that covered a total of four years, the duration for a B Ed degree. The population comprises all forth year English teaching methods class and ten lecturers in the programme. The data collection tools included documents, participant observation, journal entry, assessments and focus groups. Interviews were granted to a purposively selected number of students (9) based on their academic performance over the years. There were three weak, three medium and three strong students that were interviewed. A total of 10 teachers were randomly selected from the Faculty to get their input about students’ reading. The ages of the respondents ranged from 18-60. The study concluded that students prefer to be taught in English although most see it as a barrier to learning. The findings showed that language learning can be easier if it is considered as social practice with academic purpose. The researcher recommends that there is need for a reduction of administrative duties from the lecturers to create more time for consultation. She or he also see a need for tutorials which can help to expose learners even more to interaction in EFAL.
- Full Text:
- Date Issued: 2015
A case study: the role of a positive school climate in the enhancement of parental and community involvement at a primary school in Port Elizabeth
- Authors: Cloete, Jacqueline
- Date: 2015
- Subjects: Education -- Parent participation , Community and school , Home and school
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/8735 , vital:26425
- Description: This study examines the phenomenon of parental and community involvement in a primary school and the benefits thereof to the learners, teachers and community members. The aim of this study is to investigate how a positive school climate can improve the involvement of parents and community members in a school’s activities. The research attempted to determine what the role of a positive school climate is; the strategies schools could apply to enhance parental and community involvement, the possible benefits of involvement and reasons for non-involvement of parents and community members in school activities. The theoretical frameworks of Urie Bronfenbrenner’s ecological model and Joyce Epstein’s overlapping spheres of influence were used in the study. A case study was used as the qualitative research methodology. The data for the research was gathered from a purposive sample of teachers, community volunteer workers, parents and the principal. Semi-structured interview schedules and pre-designed questionnaires including open and closed questions, were used to collect data. The data was analysed inductively by using a descriptive open coding method to identify emerging themes. The findings of the research suggest that a positive school climate to improve parent and community involvement can be created by applying the strategies of effective communication, good working relationships, creating opportunities for involvement, ensuring a healthy and safe environment, formulating a school policy for parent and community involvement, creating a friendly and welcoming atmosphere as well as upholding an ethos of good moral values. The study found that parent and community involvement in a school’s activities offers various benefits to all stakeholders.
- Full Text:
- Date Issued: 2015
- Authors: Cloete, Jacqueline
- Date: 2015
- Subjects: Education -- Parent participation , Community and school , Home and school
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/8735 , vital:26425
- Description: This study examines the phenomenon of parental and community involvement in a primary school and the benefits thereof to the learners, teachers and community members. The aim of this study is to investigate how a positive school climate can improve the involvement of parents and community members in a school’s activities. The research attempted to determine what the role of a positive school climate is; the strategies schools could apply to enhance parental and community involvement, the possible benefits of involvement and reasons for non-involvement of parents and community members in school activities. The theoretical frameworks of Urie Bronfenbrenner’s ecological model and Joyce Epstein’s overlapping spheres of influence were used in the study. A case study was used as the qualitative research methodology. The data for the research was gathered from a purposive sample of teachers, community volunteer workers, parents and the principal. Semi-structured interview schedules and pre-designed questionnaires including open and closed questions, were used to collect data. The data was analysed inductively by using a descriptive open coding method to identify emerging themes. The findings of the research suggest that a positive school climate to improve parent and community involvement can be created by applying the strategies of effective communication, good working relationships, creating opportunities for involvement, ensuring a healthy and safe environment, formulating a school policy for parent and community involvement, creating a friendly and welcoming atmosphere as well as upholding an ethos of good moral values. The study found that parent and community involvement in a school’s activities offers various benefits to all stakeholders.
- Full Text:
- Date Issued: 2015
A century of IsiXhosa written poetry and the ideological contest in South Africa
- Authors: Mona, Godfrey Vulindlela
- Date: 2015
- Subjects: Xhosa poetry -- History and criticism , Protest poetry, Xhosa , Ideology and literature
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3651 , http://hdl.handle.net/10962/d1017892
- Description: The central argument of this inter-disciplinary study is that IsiXhosa written poetry of 1912 – 2012 is a terrain of the struggle between the contending dominant ideologies of Segregation, Apartheid and Charterism (post-Apartheid); and the subordinate/ subaltern ideologies of Africanism, Charterism (pre-democracy), Pan- Africanism, Black Consciousness Movement and other post Apartheid ideologies. The study highlights the mutual relationship between the text and the context by focussing on the ideological contest which manifests itself in both form and structure (i.e. aesthetic ideology) and the content (i.e. authorial ideology) of the poetry of different epochs between 1912 and 2012. The study is located within the framework of Antonio Gramsci’s theory of cultural construction. Gramsci postulates that ideology and culture play a significant role in the process of asserting hegemony. Important concepts that constitute Gramsci’s theory of praxis are: ideology, culture, hegemony, organic intellectuals and both ideological and repressive state apparatuses. The first chapter presents the problem, the objectives, the methodology, and the scope of the study. The second chapter presents Gramsci’s theory of cultural construction and the work of scholars who developed his theory further. The tool that is employed for analysis and interpretation of textual significations of IsiXhosa written poetry is the revolutionary aesthetics, which is proposed by Udenta. The third chapter analyses and interprets literature of the epoch of 1912-1934 and exposes the contest between Segregation and Africanism ideologies. The fourth chapter contextualises and analyses the literature of 1934 – 1948, the second phase of contestation between Segregation and Africanism. The fifth chapter deals with literature of the first and second halves of the Apartheid epoch (1948 - 1973). The Apartheid ideology contested with the Africanist ideology which transformed into the Charterism ideology in 1955. In 1960 Pan-Africanism ideology and in 1969 Black Consciousness Movement ideologies entered the contest. The sixth chapter examines literature of the period 1973 – 1994 which is the second phase of the Apartheid epoch that ends with the “glasnost” period of 1990 - 1994. The seventh chapter studies literature of the democracy period of 1994 – 2012. The eighth chapter is the summary and general conclusion. The illumination of the nexus between culture and ideology during the past century (1912 - 2012) will provide insights that will assist us in addressing the challenges we face during the democracy period, and in the development on Arts and Culture in general, and literature in particular
- Full Text:
- Date Issued: 2015
- Authors: Mona, Godfrey Vulindlela
- Date: 2015
- Subjects: Xhosa poetry -- History and criticism , Protest poetry, Xhosa , Ideology and literature
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3651 , http://hdl.handle.net/10962/d1017892
- Description: The central argument of this inter-disciplinary study is that IsiXhosa written poetry of 1912 – 2012 is a terrain of the struggle between the contending dominant ideologies of Segregation, Apartheid and Charterism (post-Apartheid); and the subordinate/ subaltern ideologies of Africanism, Charterism (pre-democracy), Pan- Africanism, Black Consciousness Movement and other post Apartheid ideologies. The study highlights the mutual relationship between the text and the context by focussing on the ideological contest which manifests itself in both form and structure (i.e. aesthetic ideology) and the content (i.e. authorial ideology) of the poetry of different epochs between 1912 and 2012. The study is located within the framework of Antonio Gramsci’s theory of cultural construction. Gramsci postulates that ideology and culture play a significant role in the process of asserting hegemony. Important concepts that constitute Gramsci’s theory of praxis are: ideology, culture, hegemony, organic intellectuals and both ideological and repressive state apparatuses. The first chapter presents the problem, the objectives, the methodology, and the scope of the study. The second chapter presents Gramsci’s theory of cultural construction and the work of scholars who developed his theory further. The tool that is employed for analysis and interpretation of textual significations of IsiXhosa written poetry is the revolutionary aesthetics, which is proposed by Udenta. The third chapter analyses and interprets literature of the epoch of 1912-1934 and exposes the contest between Segregation and Africanism ideologies. The fourth chapter contextualises and analyses the literature of 1934 – 1948, the second phase of contestation between Segregation and Africanism. The fifth chapter deals with literature of the first and second halves of the Apartheid epoch (1948 - 1973). The Apartheid ideology contested with the Africanist ideology which transformed into the Charterism ideology in 1955. In 1960 Pan-Africanism ideology and in 1969 Black Consciousness Movement ideologies entered the contest. The sixth chapter examines literature of the period 1973 – 1994 which is the second phase of the Apartheid epoch that ends with the “glasnost” period of 1990 - 1994. The seventh chapter studies literature of the democracy period of 1994 – 2012. The eighth chapter is the summary and general conclusion. The illumination of the nexus between culture and ideology during the past century (1912 - 2012) will provide insights that will assist us in addressing the challenges we face during the democracy period, and in the development on Arts and Culture in general, and literature in particular
- Full Text:
- Date Issued: 2015
A child's journey through traumatic grief: a case study
- Authors: Goliath, Chantal Debra
- Date: 2015
- Subjects: Post-traumatic stress disorder in children -- South Africa , Victims of family violence -- South Africa , Grief in children -- South Africa , Violent crimes -- South Africa , Family violence -- South Africa , Ritual abuse -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9953 , http://hdl.handle.net/10948/d1018646
- Description: The death of a parent is one of the most serious stressors that can occur in a child’s life. The aim of this study was to describe an 11-year-old child’s journey through traumatic grief after the violent death of her mother. The conceptual framework utilised was Trauma-Focused Cognitive Behavioural Therapy (TF-CBT). The case study approach was applied as it provided a suitable research design in which to give an account of the subject in a therapeutic situation. A purposive sampling technique was utilised to select the research subject in the study. The following three principles of data collection were adhered to: a) using multiple sources of information, b) creating a case study database, and c) maintaining a chain of evidence. Irving Alexander’s content-analysis technique in conjunction with Guba’s model of trustworthiness was employed for data analysis. The finding that emerged from the study was the resilience shown by Linda in relation to her adaptive functioning following the trauma of witnessing the violent death of her mother. Conclusions and recommendations were made following the findings based on the information obtained during the therapy sessions.
- Full Text:
- Date Issued: 2015
- Authors: Goliath, Chantal Debra
- Date: 2015
- Subjects: Post-traumatic stress disorder in children -- South Africa , Victims of family violence -- South Africa , Grief in children -- South Africa , Violent crimes -- South Africa , Family violence -- South Africa , Ritual abuse -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9953 , http://hdl.handle.net/10948/d1018646
- Description: The death of a parent is one of the most serious stressors that can occur in a child’s life. The aim of this study was to describe an 11-year-old child’s journey through traumatic grief after the violent death of her mother. The conceptual framework utilised was Trauma-Focused Cognitive Behavioural Therapy (TF-CBT). The case study approach was applied as it provided a suitable research design in which to give an account of the subject in a therapeutic situation. A purposive sampling technique was utilised to select the research subject in the study. The following three principles of data collection were adhered to: a) using multiple sources of information, b) creating a case study database, and c) maintaining a chain of evidence. Irving Alexander’s content-analysis technique in conjunction with Guba’s model of trustworthiness was employed for data analysis. The finding that emerged from the study was the resilience shown by Linda in relation to her adaptive functioning following the trauma of witnessing the violent death of her mother. Conclusions and recommendations were made following the findings based on the information obtained during the therapy sessions.
- Full Text:
- Date Issued: 2015
A colorimetric probe for dopamine based on gold nanoparticles-electrospun nanofibre composite
- Ngomane, Nokuthula, Torto, Nelson, Krause, Rui W M, Vilakazi, Sibulelo
- Authors: Ngomane, Nokuthula , Torto, Nelson , Krause, Rui W M , Vilakazi, Sibulelo
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/195407 , vital:45562 , xlink:href="https://doi.org/10.1016/j.matpr.2015.08.036"
- Description: An easily prepared solid state colorimetric probe for detecting the neurotransmitter dopamine (DA) was developed. The probe, in the form of an electrospun Nylon−6 (N6) nanofibre with embedded un−functionalized gold nanoparticles (UF−AuNPs) produces a clear colour change in the presence of a DA that is detectable by the naked eye. Characterisation of the nanofibre using UV/vis spectroscopy and electron microscopy (TEM) confirmed the formation of the AuNPs in the polymer solution, and that the AuNPs were completely encapsulated within the composite nanofibres before exposure to the analytes. The probe exhibited very high sensitivity towards DA resulting in colour change of the composite fibres from purple to navy blue/black even under low concentrations of DA. The probe was also selective to DA since the colour remained unchanged in the presence of commonly encountered interfering species such as ascorbic acid, uric acid, catechol, epinephrine and norepinephrine. Moreover, the colour change was observed rapid, occurring either immediately on contact with higher concentrations (5 x10−4 M) or within about 3−5 min for the lower concentrations (e.g. 5 x10−7 M). Since this probe does not require the use of any instruments, and is both rapid and stable over time, it can be applied in the field by an inexperienced person.
- Full Text:
- Date Issued: 2015
- Authors: Ngomane, Nokuthula , Torto, Nelson , Krause, Rui W M , Vilakazi, Sibulelo
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/195407 , vital:45562 , xlink:href="https://doi.org/10.1016/j.matpr.2015.08.036"
- Description: An easily prepared solid state colorimetric probe for detecting the neurotransmitter dopamine (DA) was developed. The probe, in the form of an electrospun Nylon−6 (N6) nanofibre with embedded un−functionalized gold nanoparticles (UF−AuNPs) produces a clear colour change in the presence of a DA that is detectable by the naked eye. Characterisation of the nanofibre using UV/vis spectroscopy and electron microscopy (TEM) confirmed the formation of the AuNPs in the polymer solution, and that the AuNPs were completely encapsulated within the composite nanofibres before exposure to the analytes. The probe exhibited very high sensitivity towards DA resulting in colour change of the composite fibres from purple to navy blue/black even under low concentrations of DA. The probe was also selective to DA since the colour remained unchanged in the presence of commonly encountered interfering species such as ascorbic acid, uric acid, catechol, epinephrine and norepinephrine. Moreover, the colour change was observed rapid, occurring either immediately on contact with higher concentrations (5 x10−4 M) or within about 3−5 min for the lower concentrations (e.g. 5 x10−7 M). Since this probe does not require the use of any instruments, and is both rapid and stable over time, it can be applied in the field by an inexperienced person.
- Full Text:
- Date Issued: 2015
A comparative analysis of derivative regulation following the global financial crisis : an emerging markets perspective
- Authors: Mpala, Nqobile Natasha
- Date: 2015
- Subjects: Derivative securities , Global Financial Crisis, 2008-2009 , Capital market -- Developing countries , Derivative securities -- Developing countries , International economic relations
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1121 , http://hdl.handle.net/10962/d1018660
- Description: The international financial environment has become riskier due to the recent developments in product offerings and failure of regulation to keep abreast with these changes. The Global Financial Crisis exposed inadequacies of regulation, thus consensus on the need for comprehensive and uniform regulation was made by G-20 member states. Imposing exchange trading, clearing, reporting and capital requirements on the derivatives market are some of the ways of dealing with the problems caused by lax regulatory oversight. In this study, through the comparative analysis of derivatives regulation in South Africa, Brazil, India and Turkey, it was established that emerging countries are taking active steps to implement the G-20 agreement. Uniformity in the core rules was noted, with differences in the supportive legislation. Country specific rules which support the macroeconomic factors that are faced by these countries and the infrastructure available for regulatory execution are used amongst countries. The study concluded that current regulation in emerging countries is accommodative and regulatory differences are in line with economic factors in each country.
- Full Text:
- Date Issued: 2015
- Authors: Mpala, Nqobile Natasha
- Date: 2015
- Subjects: Derivative securities , Global Financial Crisis, 2008-2009 , Capital market -- Developing countries , Derivative securities -- Developing countries , International economic relations
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1121 , http://hdl.handle.net/10962/d1018660
- Description: The international financial environment has become riskier due to the recent developments in product offerings and failure of regulation to keep abreast with these changes. The Global Financial Crisis exposed inadequacies of regulation, thus consensus on the need for comprehensive and uniform regulation was made by G-20 member states. Imposing exchange trading, clearing, reporting and capital requirements on the derivatives market are some of the ways of dealing with the problems caused by lax regulatory oversight. In this study, through the comparative analysis of derivatives regulation in South Africa, Brazil, India and Turkey, it was established that emerging countries are taking active steps to implement the G-20 agreement. Uniformity in the core rules was noted, with differences in the supportive legislation. Country specific rules which support the macroeconomic factors that are faced by these countries and the infrastructure available for regulatory execution are used amongst countries. The study concluded that current regulation in emerging countries is accommodative and regulatory differences are in line with economic factors in each country.
- Full Text:
- Date Issued: 2015
A comparative analysis of the low voter turnout in 2006 and 2011 municipal elections: Lukhanji municipality
- Authors: Jakuja, Noxolo
- Date: 2015
- Subjects: Elections -- South Africa -- Eastern Cape , Voter turnout -- South Africa , Voter registration -- South Africa , South Africa -- Politics and government
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: http://hdl.handle.net/10948/5995 , vital:21023
- Description: The aim of this study was to conduct a comparative analysis of the low voter turnout of the 2006 and 2011 municipal elections in Lukhanji Municipality. The study came as a result of the researcher’s observations of the low voter turnout during the 2011 municipal elections across the country. Upon further investigation, it was discovered that the previous municipal election of 2006 also experienced low voter turnout. However, this was not the case with national and provincial elections, because since the first election that took place in 1994, voter turnout has been high. Lukhanji Municipality, which is the area of residence for the researcher, was no different from the rest of South Africa, when it comes to low voter turnout for the municipal elections and high voter turnout for national and provincial elections. It was noted that there has never been a detailed research study conducted in Lukhanji Municipality regarding the subject in question, and also that there is a limited amount of literature that seeks to investigate voter turnout in local elections in South Africa. The large amount of available literature focuses on voter turnout during national and provincial elections in established democracies. The literature review extensively explored the determinants of voter turnout in all levels of elections. From those tested elsewhere, it was evident that no single factor can be the cause of low voting during an election, therefore it was fundamental to investigate the causes of low voter turnout of the municipal elections with special focus on Lukhanji Municipality. It became evident from the study, that indeed various factors may have led to low voter turnout during 2006 and 2011 municipal elections in Lukhanji Municipality.
- Full Text:
- Date Issued: 2015
- Authors: Jakuja, Noxolo
- Date: 2015
- Subjects: Elections -- South Africa -- Eastern Cape , Voter turnout -- South Africa , Voter registration -- South Africa , South Africa -- Politics and government
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: http://hdl.handle.net/10948/5995 , vital:21023
- Description: The aim of this study was to conduct a comparative analysis of the low voter turnout of the 2006 and 2011 municipal elections in Lukhanji Municipality. The study came as a result of the researcher’s observations of the low voter turnout during the 2011 municipal elections across the country. Upon further investigation, it was discovered that the previous municipal election of 2006 also experienced low voter turnout. However, this was not the case with national and provincial elections, because since the first election that took place in 1994, voter turnout has been high. Lukhanji Municipality, which is the area of residence for the researcher, was no different from the rest of South Africa, when it comes to low voter turnout for the municipal elections and high voter turnout for national and provincial elections. It was noted that there has never been a detailed research study conducted in Lukhanji Municipality regarding the subject in question, and also that there is a limited amount of literature that seeks to investigate voter turnout in local elections in South Africa. The large amount of available literature focuses on voter turnout during national and provincial elections in established democracies. The literature review extensively explored the determinants of voter turnout in all levels of elections. From those tested elsewhere, it was evident that no single factor can be the cause of low voting during an election, therefore it was fundamental to investigate the causes of low voter turnout of the municipal elections with special focus on Lukhanji Municipality. It became evident from the study, that indeed various factors may have led to low voter turnout during 2006 and 2011 municipal elections in Lukhanji Municipality.
- Full Text:
- Date Issued: 2015
A comparative economic analysis of small scale tobacco production under contract and non-contract farming : the case of Marondera rural district, Mashonaland East province, Zimbabwe
- Authors: Ruzhani, Freddy
- Date: 2015
- Subjects: Farms, Small -- Zimbabwe Tobacco industry -- Zimbabwe Farmers -- Zimbabwe
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/12653 , vital:39296
- Description: Constitutionalism and separation of powers is the most dynamic topic worldwide. Montesquieu, the French philosopher is credited with the doctrine of separation of powers. Various countries adopted the doctrine and modified it, in order to fit their systems of governments. The reason behind is that there is no universally recognized model of separation of powers or one size fit all. Countries apply this doctrine differently in a fashion that fits their domestic laws and constitutional requirements. Montesquieu gave a classic exposition and the rationale for separation of powers in one of his well-celebrated work “The Spirit of Laws”. The concept of separation of powers emerged premised on the theory that the arms of state namely, the judiciary, the legislature and the executive, should operate within their providence without one interfering with the other. From the South African perspective, the Constitution of South Africa of 1996 requires separation of powers even though it is not explicitly so stated in the text. This research examines the unique South African model of separation of powers and how the courts have navigated through it from the time the Constitution was promulgated. It seeks to establish whether or not a South African model of separation of powers has come to the fore. The research further examines the problem of interference amongst the arms of state and mechanism of checks and balances which can be applied to prevent or minimise such interference. In doing so, the study pursued a desktop survey of primary and secondary materials, including scientific literature, legislation, courts’ jurisprudence, and official documents. A comparative perspective was also made in order to learn from the experiences of other jurisdictions where the doctrine is applied. The findings reveal that South Africa has a unique model of separation of powers. The model was learned and enriched from various foreign jurisdictions. The courts have contributed enormously to this model, which contrive to be fluid and living.
- Full Text:
- Date Issued: 2015
- Authors: Ruzhani, Freddy
- Date: 2015
- Subjects: Farms, Small -- Zimbabwe Tobacco industry -- Zimbabwe Farmers -- Zimbabwe
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/12653 , vital:39296
- Description: Constitutionalism and separation of powers is the most dynamic topic worldwide. Montesquieu, the French philosopher is credited with the doctrine of separation of powers. Various countries adopted the doctrine and modified it, in order to fit their systems of governments. The reason behind is that there is no universally recognized model of separation of powers or one size fit all. Countries apply this doctrine differently in a fashion that fits their domestic laws and constitutional requirements. Montesquieu gave a classic exposition and the rationale for separation of powers in one of his well-celebrated work “The Spirit of Laws”. The concept of separation of powers emerged premised on the theory that the arms of state namely, the judiciary, the legislature and the executive, should operate within their providence without one interfering with the other. From the South African perspective, the Constitution of South Africa of 1996 requires separation of powers even though it is not explicitly so stated in the text. This research examines the unique South African model of separation of powers and how the courts have navigated through it from the time the Constitution was promulgated. It seeks to establish whether or not a South African model of separation of powers has come to the fore. The research further examines the problem of interference amongst the arms of state and mechanism of checks and balances which can be applied to prevent or minimise such interference. In doing so, the study pursued a desktop survey of primary and secondary materials, including scientific literature, legislation, courts’ jurisprudence, and official documents. A comparative perspective was also made in order to learn from the experiences of other jurisdictions where the doctrine is applied. The findings reveal that South Africa has a unique model of separation of powers. The model was learned and enriched from various foreign jurisdictions. The courts have contributed enormously to this model, which contrive to be fluid and living.
- Full Text:
- Date Issued: 2015
A comparative exploratory analysis of vigilante occurrences in two communities in Port Elizabeth (Kwazakhele and New Brighton)
- Authors: Loqani, Anelisa
- Date: 2015
- Subjects: Vigilantes Crime prevention -- Citizen participation -- Social aspects -- South Africa -- Eastern Cape Crime -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Soc Sci
- Identifier: http://hdl.handle.net/10353/2523 , vital:27885
- Description: The study explores and compares the incidents of vigilantism in two selected communities in Port Elizabeth. However, the word ‘vigilantism’ as utilized in the study can be explained as the group of people in a community who take the law into their own hands and punish alleged societal offenders on the spot. Vigilante activities have become a regular occurrence in many communities in Port Elizabeth and in South Africa as whole. This phenomenon as reported by several authors has destroyed many young men’s lives and ambitions. This is a paradoxical situation that violates human rights because South Africa is a country with a Constitution that prioritizes human dignity for all, and citizens that are totally free from violence of any kind. The aim of the study is to explore, analyze and compare the incidents of vigilantism in New Brighton and Kwazakhele communities in Port Elizabeth. The intention is to educate and enlighten the members of the selected communities, together with the public about vigilantism and its impact on communities.
- Full Text:
- Date Issued: 2015
- Authors: Loqani, Anelisa
- Date: 2015
- Subjects: Vigilantes Crime prevention -- Citizen participation -- Social aspects -- South Africa -- Eastern Cape Crime -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Soc Sci
- Identifier: http://hdl.handle.net/10353/2523 , vital:27885
- Description: The study explores and compares the incidents of vigilantism in two selected communities in Port Elizabeth. However, the word ‘vigilantism’ as utilized in the study can be explained as the group of people in a community who take the law into their own hands and punish alleged societal offenders on the spot. Vigilante activities have become a regular occurrence in many communities in Port Elizabeth and in South Africa as whole. This phenomenon as reported by several authors has destroyed many young men’s lives and ambitions. This is a paradoxical situation that violates human rights because South Africa is a country with a Constitution that prioritizes human dignity for all, and citizens that are totally free from violence of any kind. The aim of the study is to explore, analyze and compare the incidents of vigilantism in New Brighton and Kwazakhele communities in Port Elizabeth. The intention is to educate and enlighten the members of the selected communities, together with the public about vigilantism and its impact on communities.
- Full Text:
- Date Issued: 2015
A comparative exploratory analysis of vigilante occurrences in two communities in Port Elizabeth (Kwazakhele and New Brighton)
- Authors: Loqani, Anelisa
- Date: 2015
- Subjects: Vigilantes Crime prevention -- Citizen participation -- Social aspects -- South Africa --Eastern Cape Crime -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5369 , vital:29216
- Description: The study explores and compares the incidents of vigilantism in two selected communities in Port Elizabeth. However, the word ‘vigilantism’ as utilized in the study can be explained as the group of people in a community who take the law into their own hands and punish alleged societal offenders on the spot. Vigilante activities have become a regular occurrence in many communities in Port Elizabeth and in South Africa as whole. This phenomenon as reported by several authors has destroyed many young men’s lives and ambitions. This is a paradoxical situation that violates human rights because South Africa is a country with a Constitution that prioritizes human dignity for all, and citizens that are totally free from violence of any kind. The aim of the study is to explore, analyze and compare the incidents of vigilantism in New Brighton and Kwazakhele communities in Port Elizabeth. The intention is to educate and enlighten the members of the selected communities, together with the public about vigilantism and its impact on communities. The researcher achieved the aim of this study by asking the following questions: • What are the motives of individuals/communities who take the law into their own hands? • What impact do vigilante incidents have on communities? • Which effective preventative measures can be utilized to combat vigilantism? To answer these questions, questionnaires for data collection were utilized. The study was conducted using a total population of one hundred (100) participants who were divided by two. Each community had a sample of fifty (50) participants. The participants were selected by utilizing purposive sampling technique which is non-probability sampling. The participants were the community members of the selected communities. The researcher applied a qualitative research methodology in order to obtain in-depth information and utilized content thematic analysis and SPSS software for the analysis of the data gathered. Two theories a) Differential Association Theory and b) Social Learning Theory were employed to interpret the findings of the study. iv The results of the study demonstrate that there has been an escalation in vigilante activities in Port Elizabeth communities since 2000 and 2010. In many vigilante actions that occurred, males (ages between 18 and 30 years) were found to be the majority of the people who were more likely to be victims of vigilantism because of the crimes they commit. The results also demonstrate that an increase in vigilante incidents in New Brighton and Kwazakhele have been reported to be a result of the ineffectiveness of visible policing, easy bail conditions and frustration and anger of the community members, who do not see the criminals being arrested. These vigilante activities have been reported to have negative impact in these communities specifically on children. Based on this issue of vigilantism, several strategies that could assist to combat vigilante actions were made. The participants suggested that government should improve the criminal justice system as a whole in order to reduce vigilantism. The respondents also indicated that government should create jobs for the youths because other people become involved in criminal activities, because of poverty and lack of employment opportunities. Furthermore, the participants proposed that government should enact tough laws on offenders. v.
- Full Text:
- Date Issued: 2015
- Authors: Loqani, Anelisa
- Date: 2015
- Subjects: Vigilantes Crime prevention -- Citizen participation -- Social aspects -- South Africa --Eastern Cape Crime -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5369 , vital:29216
- Description: The study explores and compares the incidents of vigilantism in two selected communities in Port Elizabeth. However, the word ‘vigilantism’ as utilized in the study can be explained as the group of people in a community who take the law into their own hands and punish alleged societal offenders on the spot. Vigilante activities have become a regular occurrence in many communities in Port Elizabeth and in South Africa as whole. This phenomenon as reported by several authors has destroyed many young men’s lives and ambitions. This is a paradoxical situation that violates human rights because South Africa is a country with a Constitution that prioritizes human dignity for all, and citizens that are totally free from violence of any kind. The aim of the study is to explore, analyze and compare the incidents of vigilantism in New Brighton and Kwazakhele communities in Port Elizabeth. The intention is to educate and enlighten the members of the selected communities, together with the public about vigilantism and its impact on communities. The researcher achieved the aim of this study by asking the following questions: • What are the motives of individuals/communities who take the law into their own hands? • What impact do vigilante incidents have on communities? • Which effective preventative measures can be utilized to combat vigilantism? To answer these questions, questionnaires for data collection were utilized. The study was conducted using a total population of one hundred (100) participants who were divided by two. Each community had a sample of fifty (50) participants. The participants were selected by utilizing purposive sampling technique which is non-probability sampling. The participants were the community members of the selected communities. The researcher applied a qualitative research methodology in order to obtain in-depth information and utilized content thematic analysis and SPSS software for the analysis of the data gathered. Two theories a) Differential Association Theory and b) Social Learning Theory were employed to interpret the findings of the study. iv The results of the study demonstrate that there has been an escalation in vigilante activities in Port Elizabeth communities since 2000 and 2010. In many vigilante actions that occurred, males (ages between 18 and 30 years) were found to be the majority of the people who were more likely to be victims of vigilantism because of the crimes they commit. The results also demonstrate that an increase in vigilante incidents in New Brighton and Kwazakhele have been reported to be a result of the ineffectiveness of visible policing, easy bail conditions and frustration and anger of the community members, who do not see the criminals being arrested. These vigilante activities have been reported to have negative impact in these communities specifically on children. Based on this issue of vigilantism, several strategies that could assist to combat vigilante actions were made. The participants suggested that government should improve the criminal justice system as a whole in order to reduce vigilantism. The respondents also indicated that government should create jobs for the youths because other people become involved in criminal activities, because of poverty and lack of employment opportunities. Furthermore, the participants proposed that government should enact tough laws on offenders. v.
- Full Text:
- Date Issued: 2015
A comparative photophysicochemical study of phthalocyanines encapsulated in core–shell silica nanoparticles
- Fashina, Adedayo, Amuhaya, Edith, Nyokong, Tebello
- Authors: Fashina, Adedayo , Amuhaya, Edith , Nyokong, Tebello
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189708 , vital:44924 , xlink:href="https://doi.org/10.1016/j.saa.2014.08.062"
- Description: This work presents the synthesis and characterization of a new zinc phthalocyanine complex tetrasubstituted with 3-carboxyphenoxy in the peripheral position. The photophysical properties of the new complex are compared with those of phthalocyanines tetra substituted with 3-carboxyphenoxy or 4- carboxyphenoxy at non-peripheral positions. Three phthalocyanine complexes were encapsulated within silica matrix to form a core shell and the hybrid nanoparticles particles obtained were spherical and mono dispersed. When encapsulated within the silica shell nanoparticles, phthalocyanines showed improved triplet quantum yields and singlet oxygen quantum yields than surface grafted derivatives. The improvements observed could be attributed to the protection provided for the phthalocyanine complexes by the silica matrix.
- Full Text:
- Date Issued: 2015
- Authors: Fashina, Adedayo , Amuhaya, Edith , Nyokong, Tebello
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189708 , vital:44924 , xlink:href="https://doi.org/10.1016/j.saa.2014.08.062"
- Description: This work presents the synthesis and characterization of a new zinc phthalocyanine complex tetrasubstituted with 3-carboxyphenoxy in the peripheral position. The photophysical properties of the new complex are compared with those of phthalocyanines tetra substituted with 3-carboxyphenoxy or 4- carboxyphenoxy at non-peripheral positions. Three phthalocyanine complexes were encapsulated within silica matrix to form a core shell and the hybrid nanoparticles particles obtained were spherical and mono dispersed. When encapsulated within the silica shell nanoparticles, phthalocyanines showed improved triplet quantum yields and singlet oxygen quantum yields than surface grafted derivatives. The improvements observed could be attributed to the protection provided for the phthalocyanine complexes by the silica matrix.
- Full Text:
- Date Issued: 2015
A comparative study of performance and efficiency of a tube and fin type domestic solar water heat collector
- Authors: Kleyn, Gysbert
- Date: 2015
- Subjects: Solar collectors , Solar water heaters -- Testing , Solar heating
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/7959 , vital:24329
- Description: The main purpose of this research project was to do a comparative study, by identifying a testing methodology for transient conditions, through which to allow the expression of the relative thermal performance of two DSWH collectors in comparison. The study started off by considering literature about Solar Domestic Water Heaters and National Standards-based test methods, most of which were for Steady State testing conditions. Thereafter establishing a testing methodology and setup, identifying factors to be considered. The results were analyzed and conclusions drawn. The hypothesis was to allow the reduction in the complexity of testing equipment and methods, and by doing transient condition testing and still utilizing the Hottel-Whillier-Bliss relationship as a way of expressing efficiency, the hypothesis was proven.
- Full Text:
- Date Issued: 2015
- Authors: Kleyn, Gysbert
- Date: 2015
- Subjects: Solar collectors , Solar water heaters -- Testing , Solar heating
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/7959 , vital:24329
- Description: The main purpose of this research project was to do a comparative study, by identifying a testing methodology for transient conditions, through which to allow the expression of the relative thermal performance of two DSWH collectors in comparison. The study started off by considering literature about Solar Domestic Water Heaters and National Standards-based test methods, most of which were for Steady State testing conditions. Thereafter establishing a testing methodology and setup, identifying factors to be considered. The results were analyzed and conclusions drawn. The hypothesis was to allow the reduction in the complexity of testing equipment and methods, and by doing transient condition testing and still utilizing the Hottel-Whillier-Bliss relationship as a way of expressing efficiency, the hypothesis was proven.
- Full Text:
- Date Issued: 2015
A comparative study of the in vitro antidiabetic properties, cytotoxicity and mechanism of action of Albuca bracteata and Albuca setosa bulb extracts
- Authors: Odeyemi, Samuel Wale
- Date: 2015
- Subjects: Medicinal plants Herbs -- Therapeutic use Diabetics -- Alternative treatment
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/3154 , vital:28327
- Description: The search for cheap, non toxic and readily available antidiabetic drugs has been a challenge for researchers and the pharmaceutical industries. Diabetes mellitus is a metabolic disease characterized by defects in the synthesis of insulin and/or insensitivity to the action of insulin at the target cells. The disease has been on the increase mostly in developing countries where large proportions of the population have little access to good medical care due to either accessibility or non availability of synthetic drugs. This has led to the use of medicinal plants to treat diabetes because it is safe, cheap and with few side effects. There is little scientific evidence on the dosages, active compounds, mechanisms of action and toxicity of these traditionally used plants. Two of the most frequently used plants; Albuca setosa and Albuca bracteata were investigated in this study. The qualitative analysis of different extractions of these plants revealed the presence of phenolics, alkaloids, tannins and saponins. The antioxidant properties of aqueous, acetone and methanollic extracts of Albuca setosa and Albuca bracteata were investigated using models such as Diphenyl-1-Picrylhydrazyl (DPPH), 2, 2’-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS), Ferric ion reducing antioxidant potential (FRAP), Nitric Oxide and Hydrogen Peroxide (H2O2). Both plants revealed inhibitions against DPPH in a concentration - dependent manner with Albuca setosa (0.330 mg/ml) showing higher activity than Albuca bracteata (0.647 mg/ml) determined from the IC50. The aqueous extract of Albuca setosa showed a higher inhibition against DPPH radical compared to the Albuca bracteata aqueous extract at all concentrations investigated. The isolated saponins from Albuca bracteata had a higher DPPH scavenging activity than the crude methanolic extract of the plant in a concentration - dependent manner but are significantly different from each other at 0.4, 0.6 and 1.0 mg/ml only. The IC50 of the saponins was also observed to be higher than the crude extracts and standards.The Albuca setosa aqueous extract showed a higher percentage inhibition of ABTS radicals than Albuca bracteata at all the concentrations investigated. Overall, the Albuca setosa aqueous extract (0.0809 mg/ml) showed maximum activity against ABTS radicals. The iron reducing power was significantly higher (P < 0.05) in the methanolic extract of both plants compared to the aqueous counterpart. Overall, the Albuca bracteata aqueous extract (0.344 mg/ml) showed maximum activity as indicated by the IC50. The aqueous extracts of both plants also revealed percentage inhibitions in a concentration - dependent manner against NO2. The aqueous extract of Albuca bracteata bulb was more active against nitric oxide and hydrogen peroxide inhibition. In this study, the cytotoxicity of the extracts was evaluated at a high dose of 100 μg/ml on Chang liver cells and determined using MTT, crystal violet, glucose consumption, lactate production and lactate dehydrogenase release and FRAP. The aqueous extracts of both Albuca setosa and Albuca bracteata were non-toxic on Chang liver cells at the concentrations investigated. The MTT revealed that the aqueous extract of Albuca setosa bulb had the optimum cell viability of 108.09 percent while the acetonic extract of Albuca bracteata showed the least cell viability (37.72 percent) compared with the control. The crystal violet test also revealed the acetone extract of Albuca bracteata to have the least percentage of cell viability at 31.47 percent, while the aqueous extract of Albuca setosa showed the maximum cell viability at 112.5 percent. The aqueous extracts of both plants showed higher percentage cell density on the second day of incubation from the proliferation assay. All the tested samples were observed to consume more glucose than the blank except for the methanollic and acetone extracts of Albuca bracteata bulb. The aqueous and methanolic extracts of Albuca setosa bulbs produced the highest lactate with 120.2 μg/ml and 113.7 μg/ml respectively. The acetone extracts of both Albuca setosa and Albuca bracteata revealed toxicity with a higher lactate dehydrogenase release compared to the control.
- Full Text:
- Date Issued: 2015
- Authors: Odeyemi, Samuel Wale
- Date: 2015
- Subjects: Medicinal plants Herbs -- Therapeutic use Diabetics -- Alternative treatment
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/3154 , vital:28327
- Description: The search for cheap, non toxic and readily available antidiabetic drugs has been a challenge for researchers and the pharmaceutical industries. Diabetes mellitus is a metabolic disease characterized by defects in the synthesis of insulin and/or insensitivity to the action of insulin at the target cells. The disease has been on the increase mostly in developing countries where large proportions of the population have little access to good medical care due to either accessibility or non availability of synthetic drugs. This has led to the use of medicinal plants to treat diabetes because it is safe, cheap and with few side effects. There is little scientific evidence on the dosages, active compounds, mechanisms of action and toxicity of these traditionally used plants. Two of the most frequently used plants; Albuca setosa and Albuca bracteata were investigated in this study. The qualitative analysis of different extractions of these plants revealed the presence of phenolics, alkaloids, tannins and saponins. The antioxidant properties of aqueous, acetone and methanollic extracts of Albuca setosa and Albuca bracteata were investigated using models such as Diphenyl-1-Picrylhydrazyl (DPPH), 2, 2’-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS), Ferric ion reducing antioxidant potential (FRAP), Nitric Oxide and Hydrogen Peroxide (H2O2). Both plants revealed inhibitions against DPPH in a concentration - dependent manner with Albuca setosa (0.330 mg/ml) showing higher activity than Albuca bracteata (0.647 mg/ml) determined from the IC50. The aqueous extract of Albuca setosa showed a higher inhibition against DPPH radical compared to the Albuca bracteata aqueous extract at all concentrations investigated. The isolated saponins from Albuca bracteata had a higher DPPH scavenging activity than the crude methanolic extract of the plant in a concentration - dependent manner but are significantly different from each other at 0.4, 0.6 and 1.0 mg/ml only. The IC50 of the saponins was also observed to be higher than the crude extracts and standards.The Albuca setosa aqueous extract showed a higher percentage inhibition of ABTS radicals than Albuca bracteata at all the concentrations investigated. Overall, the Albuca setosa aqueous extract (0.0809 mg/ml) showed maximum activity against ABTS radicals. The iron reducing power was significantly higher (P < 0.05) in the methanolic extract of both plants compared to the aqueous counterpart. Overall, the Albuca bracteata aqueous extract (0.344 mg/ml) showed maximum activity as indicated by the IC50. The aqueous extracts of both plants also revealed percentage inhibitions in a concentration - dependent manner against NO2. The aqueous extract of Albuca bracteata bulb was more active against nitric oxide and hydrogen peroxide inhibition. In this study, the cytotoxicity of the extracts was evaluated at a high dose of 100 μg/ml on Chang liver cells and determined using MTT, crystal violet, glucose consumption, lactate production and lactate dehydrogenase release and FRAP. The aqueous extracts of both Albuca setosa and Albuca bracteata were non-toxic on Chang liver cells at the concentrations investigated. The MTT revealed that the aqueous extract of Albuca setosa bulb had the optimum cell viability of 108.09 percent while the acetonic extract of Albuca bracteata showed the least cell viability (37.72 percent) compared with the control. The crystal violet test also revealed the acetone extract of Albuca bracteata to have the least percentage of cell viability at 31.47 percent, while the aqueous extract of Albuca setosa showed the maximum cell viability at 112.5 percent. The aqueous extracts of both plants showed higher percentage cell density on the second day of incubation from the proliferation assay. All the tested samples were observed to consume more glucose than the blank except for the methanollic and acetone extracts of Albuca bracteata bulb. The aqueous and methanolic extracts of Albuca setosa bulbs produced the highest lactate with 120.2 μg/ml and 113.7 μg/ml respectively. The acetone extracts of both Albuca setosa and Albuca bracteata revealed toxicity with a higher lactate dehydrogenase release compared to the control.
- Full Text:
- Date Issued: 2015