Positions on the mat : a micro-ethnographic study of teachers' and learners' co-construction of an early literacy practice
- Authors: Van der Mescht, Caroline
- Date: 2013 , 2013-06-10
- Subjects: Literacy -- Study and teaching (Primary) -- South Africa -- Eastern Cape English language -- Study and teaching (Primary) -- South Africa -- Eastern Cape English literature -- Study and teaching (Primary) -- South Africa -- Eastern Cape Education, Primary -- Research -- South Africa -- Eastern Cape Teachers -- Psychology Language and culture
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1836 , http://hdl.handle.net/10962/d1004333
- Description: Thesis embargoed until end of 2023. , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2013
- Authors: Van der Mescht, Caroline
- Date: 2013 , 2013-06-10
- Subjects: Literacy -- Study and teaching (Primary) -- South Africa -- Eastern Cape English language -- Study and teaching (Primary) -- South Africa -- Eastern Cape English literature -- Study and teaching (Primary) -- South Africa -- Eastern Cape Education, Primary -- Research -- South Africa -- Eastern Cape Teachers -- Psychology Language and culture
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1836 , http://hdl.handle.net/10962/d1004333
- Description: Thesis embargoed until end of 2023. , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2013
Possibilities for multilingualism: a critical case study with selected financial information systems (FIS) students
- Authors: Adams, Natalie
- Date: 2013
- Subjects: Language and languages -- Study and teaching -- Bilingual method , Education, Bilingual
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8367 , http://hdl.handle.net/10948/d1011052 , Language and languages -- Study and teaching -- Bilingual method , Education, Bilingual
- Description: This study aims at eliciting what shifts in term of multilingual possibilities can be detected in the language attitudes of first year National Diploma in Financial Information Systems students and their lectures. Qualitative methods are used: data is gathered using a questionnaire, 3 focus group discussions with students, interviews with 2 lecturers as well as an interview with language development practitioner. The questionnaire is modelled on attitudinal studies conducted at University of the Western Cape (Dyers 2001), University of Ford Hare (Dalwit 2001) and at Rhodes University (Aziakpono 2008). The questionnaire data, however, is only used a precursor to the study. The focuses of the study are the 3 focus group discussion and the semi structured interview with two lecturers and language development practitioner. The results of the snap shot questionnaire and first focus group discussion are similar to the three studies on language choices at Fort Hare, Rhodes and the University of the Western Cape respectively whereby students prefer English as the language of learning and teaching. The second focus group discussion is based on an article which students had to read. The article, Here, mother tongue clashes with her mother‟s tongue, focuses on the price that South African black children will pay for the constant erosion of African languages. The article‟s provocative focus challenges commonplace acceptance of English and so resonated with the students‟ exploration of multilingual possibilities. Focus group three revealed that students had experienced an attitudinal shift and realized the significance of mother tongue education as well as the importance of multilingual strategies.
- Full Text:
- Date Issued: 2013
- Authors: Adams, Natalie
- Date: 2013
- Subjects: Language and languages -- Study and teaching -- Bilingual method , Education, Bilingual
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8367 , http://hdl.handle.net/10948/d1011052 , Language and languages -- Study and teaching -- Bilingual method , Education, Bilingual
- Description: This study aims at eliciting what shifts in term of multilingual possibilities can be detected in the language attitudes of first year National Diploma in Financial Information Systems students and their lectures. Qualitative methods are used: data is gathered using a questionnaire, 3 focus group discussions with students, interviews with 2 lecturers as well as an interview with language development practitioner. The questionnaire is modelled on attitudinal studies conducted at University of the Western Cape (Dyers 2001), University of Ford Hare (Dalwit 2001) and at Rhodes University (Aziakpono 2008). The questionnaire data, however, is only used a precursor to the study. The focuses of the study are the 3 focus group discussion and the semi structured interview with two lecturers and language development practitioner. The results of the snap shot questionnaire and first focus group discussion are similar to the three studies on language choices at Fort Hare, Rhodes and the University of the Western Cape respectively whereby students prefer English as the language of learning and teaching. The second focus group discussion is based on an article which students had to read. The article, Here, mother tongue clashes with her mother‟s tongue, focuses on the price that South African black children will pay for the constant erosion of African languages. The article‟s provocative focus challenges commonplace acceptance of English and so resonated with the students‟ exploration of multilingual possibilities. Focus group three revealed that students had experienced an attitudinal shift and realized the significance of mother tongue education as well as the importance of multilingual strategies.
- Full Text:
- Date Issued: 2013
Possible futures for the Republic of South Africa towards 2055
- Adendorff, Christian Michael
- Authors: Adendorff, Christian Michael
- Date: 2013
- Subjects: Economic development -- South Africa , Sustainable development -- South Africa
- Language: English
- Type: Thesis , Doctoral , DBA
- Identifier: http://hdl.handle.net/10948/7816 , vital:24294
- Description: The purpose of this thesis was to develop four scenarios for South Africa over the next forty years: Mandela's Dream in which positive elements come into function for South Africa's economy and governance; the Historical African Syndrome, in which the key driving forces unfold in an uneven pattern, or have a differentiated impact on South Africa's economy; the Good, the Bad and the Ugly in which less good governance prevails, but where a fortunate economy and firm national management allow South Africa to become competitive and benefit from satisfactory economic growth; and the Pyramid Syndrome Scenario in which negative regional drivers of change corrode positive policies and initiatives in a manner which compounds the pre-existing threats to South Africa's growth.
- Full Text:
- Date Issued: 2013
- Authors: Adendorff, Christian Michael
- Date: 2013
- Subjects: Economic development -- South Africa , Sustainable development -- South Africa
- Language: English
- Type: Thesis , Doctoral , DBA
- Identifier: http://hdl.handle.net/10948/7816 , vital:24294
- Description: The purpose of this thesis was to develop four scenarios for South Africa over the next forty years: Mandela's Dream in which positive elements come into function for South Africa's economy and governance; the Historical African Syndrome, in which the key driving forces unfold in an uneven pattern, or have a differentiated impact on South Africa's economy; the Good, the Bad and the Ugly in which less good governance prevails, but where a fortunate economy and firm national management allow South Africa to become competitive and benefit from satisfactory economic growth; and the Pyramid Syndrome Scenario in which negative regional drivers of change corrode positive policies and initiatives in a manner which compounds the pre-existing threats to South Africa's growth.
- Full Text:
- Date Issued: 2013
Post-war reconstruction and development: a collective case study
- Authors: Heleta, Savo
- Date: 2013
- Subjects: Civil war , Peace , Peace-building , Nation-building
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9058 , http://hdl.handle.net/10948/d1008049 , Civil war , Peace , Peace-building , Nation-building
- Description: Since the end of the Cold War, there has been a surge in post-war stabilisation, reconstruction and development operations around the world. Externally driven efforts have been shaped by the liberal peace framework, which assumes that a rapid transmission or imposition of neo-liberal norms and values, combined with Western-style governance institutions, would create conditions for lasting peace and prosperity. Only in a few instances countries have attempted internally driven post-war reconstruction and development; in most cases, these efforts were either ignored or suppressed by international analysts, experts, academics and organisations. Despite all the expertise and funding spent since the early 1990s, externally driven operations have not led to lasting peace and stability, establishment of functioning institutions, eradication of poverty, livelihood improvements and economic reconstruction and development in war-torn countries. All too often, programmes, policies and „solutions‟ were designed and imposed by external actors either because they worked elsewhere or because they were influenced by geopolitical, economic and/or security interests of powerful countries. Furthermore, external actors have tended to assume that generic approaches based on the liberal peace framework can work in all places, while ignoring local actors, contexts and knowledge. Focusing on Bosnia and Herzegovina, South Sudan and Somaliland, this exploratory qualitative study critically explores and assesses both externally and internally driven post-war reconstruction and development practices and operations in order to understand the strengths and shortcomings of both approaches and offer recommendations for future improvements. This is important since socio-economic recovery and economic development are crucial for lasting stability and peace in post-war countries.
- Full Text:
- Date Issued: 2013
- Authors: Heleta, Savo
- Date: 2013
- Subjects: Civil war , Peace , Peace-building , Nation-building
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9058 , http://hdl.handle.net/10948/d1008049 , Civil war , Peace , Peace-building , Nation-building
- Description: Since the end of the Cold War, there has been a surge in post-war stabilisation, reconstruction and development operations around the world. Externally driven efforts have been shaped by the liberal peace framework, which assumes that a rapid transmission or imposition of neo-liberal norms and values, combined with Western-style governance institutions, would create conditions for lasting peace and prosperity. Only in a few instances countries have attempted internally driven post-war reconstruction and development; in most cases, these efforts were either ignored or suppressed by international analysts, experts, academics and organisations. Despite all the expertise and funding spent since the early 1990s, externally driven operations have not led to lasting peace and stability, establishment of functioning institutions, eradication of poverty, livelihood improvements and economic reconstruction and development in war-torn countries. All too often, programmes, policies and „solutions‟ were designed and imposed by external actors either because they worked elsewhere or because they were influenced by geopolitical, economic and/or security interests of powerful countries. Furthermore, external actors have tended to assume that generic approaches based on the liberal peace framework can work in all places, while ignoring local actors, contexts and knowledge. Focusing on Bosnia and Herzegovina, South Sudan and Somaliland, this exploratory qualitative study critically explores and assesses both externally and internally driven post-war reconstruction and development practices and operations in order to understand the strengths and shortcomings of both approaches and offer recommendations for future improvements. This is important since socio-economic recovery and economic development are crucial for lasting stability and peace in post-war countries.
- Full Text:
- Date Issued: 2013
Postcolonial monuments and public sculpture in Zimbabwe
- Authors: Samwanda, Biggie
- Date: 2013 , 2013-10-10
- Subjects: Benhura, Dominic, 1968- -- Criticism and interpretation Madebe, Adam -- Criticism and interpretation Postcolonialism and the arts Monuments -- Zimbabwe Public sculpture -- Zimbabwe Art -- Political aspects -- Zimbabwe Collective memory in art -- Zimbabwe Old Bulawayo (Zimbabwe) National Heroes Acre (Zimbabwe)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2447 , http://hdl.handle.net/10962/d1006825
- Description: The study critically examines public art in postcolonial Zimbabwe‘s cities of Harare and Bulawayo. In a case by case approach, I analyse the National Heroes Acre and Old Bulawayo monuments, and three contemporary sculptures – Dominic Benhura‘s Leapfrog (1993) and Adam Madebe‘s Ploughman (1987) and Looking into the future (1985). I used a qualitative research methodology to collect and analyse data. My research design utilised in-depth interviews, observation, content and document analysis, and photography to gather nuanced data and these methods ensured that data collected is validated and/or triangulated. I argue that in Zimbabwe, monuments and public sculpture serve as the necessary interface of the visual, cultural and political discourse of a postcolonial nation that is constantly in transition and dialogue with the everyday realities of trying to understand and construct a national identity from a nest of sub-cultures. I further argue that monuments and public sculpture in Zimbabwe abound with political imperatives given that, as visual artefacts that interlace with ritual performance, they are conscious creations of society and are therefore constitutive of that society‘s heritage and social memory. Since independence in 1980, monuments and public sculpture have helped to open up discursive space and dialogue on national issues and myths. Such discursive spaces and dialogues, I also argue, have been particularly animated from the late 1990s to the present, a period in which the nation has engaged in self-introspection in the face of socio-political change and challenges in the continual process of imagining the Zimbabwean nation. Little research focusing on postcolonial public art in Zimbabwe has hitherto been undertaken. This study addresses gaps in this literature while also providing a spring board from which future studies may emerge. , Microsoft� Word 2010 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2013
- Authors: Samwanda, Biggie
- Date: 2013 , 2013-10-10
- Subjects: Benhura, Dominic, 1968- -- Criticism and interpretation Madebe, Adam -- Criticism and interpretation Postcolonialism and the arts Monuments -- Zimbabwe Public sculpture -- Zimbabwe Art -- Political aspects -- Zimbabwe Collective memory in art -- Zimbabwe Old Bulawayo (Zimbabwe) National Heroes Acre (Zimbabwe)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2447 , http://hdl.handle.net/10962/d1006825
- Description: The study critically examines public art in postcolonial Zimbabwe‘s cities of Harare and Bulawayo. In a case by case approach, I analyse the National Heroes Acre and Old Bulawayo monuments, and three contemporary sculptures – Dominic Benhura‘s Leapfrog (1993) and Adam Madebe‘s Ploughman (1987) and Looking into the future (1985). I used a qualitative research methodology to collect and analyse data. My research design utilised in-depth interviews, observation, content and document analysis, and photography to gather nuanced data and these methods ensured that data collected is validated and/or triangulated. I argue that in Zimbabwe, monuments and public sculpture serve as the necessary interface of the visual, cultural and political discourse of a postcolonial nation that is constantly in transition and dialogue with the everyday realities of trying to understand and construct a national identity from a nest of sub-cultures. I further argue that monuments and public sculpture in Zimbabwe abound with political imperatives given that, as visual artefacts that interlace with ritual performance, they are conscious creations of society and are therefore constitutive of that society‘s heritage and social memory. Since independence in 1980, monuments and public sculpture have helped to open up discursive space and dialogue on national issues and myths. Such discursive spaces and dialogues, I also argue, have been particularly animated from the late 1990s to the present, a period in which the nation has engaged in self-introspection in the face of socio-political change and challenges in the continual process of imagining the Zimbabwean nation. Little research focusing on postcolonial public art in Zimbabwe has hitherto been undertaken. This study addresses gaps in this literature while also providing a spring board from which future studies may emerge. , Microsoft� Word 2010 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2013
Poverty alleviation programmes in selected towns of the Thabo Mofutsanyane District Municipality
- Authors: Mponya, Mahlomaholo Fred
- Date: 2013
- Subjects: Poverty -- South Africa , Economic assistance, Domestic -- South Africa , Economic development projects -- South Africa , Poor
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9173 , http://hdl.handle.net/10948/d1020112
- Description: The period 1994 to 1999 saw the implementation of fundamental social and political change in South Africa. Social science literature suggests that such fundamental change increases the probability of civil conflict and strife, as some sectors of the population expect significant improvements in their position following the removal of economic and political barriers that previously inhibited their upward mobility. Other sectors are concerned about a possible decrease in their living standards of the erosion of their privileged position. Still others experience increased uncertainty, which in itself is associated with significant social change. It is significant to state that poverty in South Africa is intertwined with a host of social and economic issues. The burden of poverty is exacerbated by limited access to basic services, poor housing, limited employment opportunities and inadequate infrastructure, which are an outcome of the terrible legacies of apartheid. The South African government has set certain targets to reduce poverty by half by 2014, in line with its vision for 2014 and in line with its commitment to the Millennium Development Goals. In an endeavour to realise this commitment, the government has prioritised the improvement of service delivery as one of the indicators of progress. However, although the government has made improvements and attained some of its goals, it still needs to do more. With apartheid no longer in place as the system to blame for every grievance, other rifts may have developed in society and become grounds for mobilisation, Klandermans, B. et al. 2001. Mantsopa Local Municipality is not an exception to these developments and it faces a series of challenges. Despite nineteen years of democracy, poverty is still common in Mantsopa. Unemployment levels are high and many people depend on government old age pensions, seasonal farm work, minor-scale self-employment and part-time jobs for the survival of the entire household. These developments have led to the study of poverty alleviation programmes in selected towns of Thabo Mofutsanyane District Municipality. The researcher investigates these programmes through the analysis of secondary data.
- Full Text:
- Date Issued: 2013
- Authors: Mponya, Mahlomaholo Fred
- Date: 2013
- Subjects: Poverty -- South Africa , Economic assistance, Domestic -- South Africa , Economic development projects -- South Africa , Poor
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9173 , http://hdl.handle.net/10948/d1020112
- Description: The period 1994 to 1999 saw the implementation of fundamental social and political change in South Africa. Social science literature suggests that such fundamental change increases the probability of civil conflict and strife, as some sectors of the population expect significant improvements in their position following the removal of economic and political barriers that previously inhibited their upward mobility. Other sectors are concerned about a possible decrease in their living standards of the erosion of their privileged position. Still others experience increased uncertainty, which in itself is associated with significant social change. It is significant to state that poverty in South Africa is intertwined with a host of social and economic issues. The burden of poverty is exacerbated by limited access to basic services, poor housing, limited employment opportunities and inadequate infrastructure, which are an outcome of the terrible legacies of apartheid. The South African government has set certain targets to reduce poverty by half by 2014, in line with its vision for 2014 and in line with its commitment to the Millennium Development Goals. In an endeavour to realise this commitment, the government has prioritised the improvement of service delivery as one of the indicators of progress. However, although the government has made improvements and attained some of its goals, it still needs to do more. With apartheid no longer in place as the system to blame for every grievance, other rifts may have developed in society and become grounds for mobilisation, Klandermans, B. et al. 2001. Mantsopa Local Municipality is not an exception to these developments and it faces a series of challenges. Despite nineteen years of democracy, poverty is still common in Mantsopa. Unemployment levels are high and many people depend on government old age pensions, seasonal farm work, minor-scale self-employment and part-time jobs for the survival of the entire household. These developments have led to the study of poverty alleviation programmes in selected towns of Thabo Mofutsanyane District Municipality. The researcher investigates these programmes through the analysis of secondary data.
- Full Text:
- Date Issued: 2013
Poverty alleviation through empowerment and participation: the Seki Women's Foundation
- Authors: Lawrence, Yolisa Innocentia
- Date: 2013
- Subjects: Economic assistance, Domestic -- South Africa -- Port Elizabeth , Sustainable development -- South Africa -- Port Elizabeth , Community development -- South Africa -- Port Elizabeth , Poverty -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9160 , http://hdl.handle.net/10948/d1020020
- Description: As poverty alleviation projects are being established in communities in order to reduce the impact of unemployment, crime, and inequality as well as other factors propagating poverty, numerous projects fail to democratically meet the needs of the poor majority. Development initiatives brought forth by government and non-governmental organisations, which adopt a top-down approach in order to accelerate development, do not always have a positive effect on the community, especially on the poor majority, which development is meant to empower and benefit. This results in the short life span of the project and leads the community into immense poverty. Thus, the focus of this research paper was to evaluate the extent to which poverty alleviation projects such as the Seki Women’s Foundation, contribute towards the alleviation of poverty in its community, located in New Brighton, Port Elizabeth. This evaluation study focused more on aspects of development concerning community participation, empowerment through skills training and project sustainability. The objectives of the study were to investigate the values, aims and objectives of the Seki Women’s Foundation; how these values, aims and objectives were fulfilled; the challenges faced by the project towards effective community development and the determinants of the long-term sustainability of the project. The research study adopted a qualitative approach, which allowed the researcher to collect meaningful knowledge from the volunteers and stakeholders by conducting semi-structured interviews and a focus group which were guided by open-ended questions. The data was thematically analysed where important concepts were coded in order to obtain accurate information so that valid results could be reached. The main findings of the research study suggested that the contribution made by the Seki Women’s Foundation towards poverty alleviation and community development is to empower the volunteers and community through skills training in baking, gardening and sewing. The volunteers share these skills amongst community members, enabling them to be self-sufficient and implement the skills in their own surroundings. The project builds strong partnerships with the stakeholders by being accountable and transparent about the utilisation of funds through report formulation. Although the project implements some principles of community development, the full participation of volunteers in the development process remains a concern, especially in decision making. The challenges faced by the project are concerned with burglary of clothing containers, stealing of vegetation and garden tools and the community not buying the products sold by the project. The research study recommends that the volunteers reason with the community and instil trust and honesty to avoid crime. The project should instil authentic participation in all development processes and form a partnership with local shops in convincing them to sell their produce as this will allow some income to generate within the project and community.
- Full Text:
- Date Issued: 2013
- Authors: Lawrence, Yolisa Innocentia
- Date: 2013
- Subjects: Economic assistance, Domestic -- South Africa -- Port Elizabeth , Sustainable development -- South Africa -- Port Elizabeth , Community development -- South Africa -- Port Elizabeth , Poverty -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9160 , http://hdl.handle.net/10948/d1020020
- Description: As poverty alleviation projects are being established in communities in order to reduce the impact of unemployment, crime, and inequality as well as other factors propagating poverty, numerous projects fail to democratically meet the needs of the poor majority. Development initiatives brought forth by government and non-governmental organisations, which adopt a top-down approach in order to accelerate development, do not always have a positive effect on the community, especially on the poor majority, which development is meant to empower and benefit. This results in the short life span of the project and leads the community into immense poverty. Thus, the focus of this research paper was to evaluate the extent to which poverty alleviation projects such as the Seki Women’s Foundation, contribute towards the alleviation of poverty in its community, located in New Brighton, Port Elizabeth. This evaluation study focused more on aspects of development concerning community participation, empowerment through skills training and project sustainability. The objectives of the study were to investigate the values, aims and objectives of the Seki Women’s Foundation; how these values, aims and objectives were fulfilled; the challenges faced by the project towards effective community development and the determinants of the long-term sustainability of the project. The research study adopted a qualitative approach, which allowed the researcher to collect meaningful knowledge from the volunteers and stakeholders by conducting semi-structured interviews and a focus group which were guided by open-ended questions. The data was thematically analysed where important concepts were coded in order to obtain accurate information so that valid results could be reached. The main findings of the research study suggested that the contribution made by the Seki Women’s Foundation towards poverty alleviation and community development is to empower the volunteers and community through skills training in baking, gardening and sewing. The volunteers share these skills amongst community members, enabling them to be self-sufficient and implement the skills in their own surroundings. The project builds strong partnerships with the stakeholders by being accountable and transparent about the utilisation of funds through report formulation. Although the project implements some principles of community development, the full participation of volunteers in the development process remains a concern, especially in decision making. The challenges faced by the project are concerned with burglary of clothing containers, stealing of vegetation and garden tools and the community not buying the products sold by the project. The research study recommends that the volunteers reason with the community and instil trust and honesty to avoid crime. The project should instil authentic participation in all development processes and form a partnership with local shops in convincing them to sell their produce as this will allow some income to generate within the project and community.
- Full Text:
- Date Issued: 2013
Practice guidelines for supporting youth-headed families to enhance their resilience
- Authors: Soji, Zoleka
- Date: 2013
- Subjects: Child support -- South Africa , Child caregivers -- South Africa , Orphans -- Care -- South Africa , Child welfare -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:10004 , http://hdl.handle.net/10948/d1016381
- Description: The topic of the research is derived from the researcher‟s own interest as a social worker and observations of reality within youth-headed families. Over the past few years the number of published studies on child and youth-headed households has grown out of the realisation that this multi-faceted phenomenon is growing in numbers and complexity. Most of these studies and reports concentrate on the issue of scale and the severity of the crisis of child and youth-headed households (UNICEF, 2002; Maqoko & Dryer, 2007 & Kuhanen, Shemeikka, Notkola & Nghixulifwa, 2008). These studies reveal the complex nature of the phenomenon of child and youth-headed families and the challenges that face young people within these families which impact on their growth and development. In most of the studies, the phenomenon of child and youth-headed households has been reported to have an impact on societal framework as a result of its complexity (UNICEF, 2002, 2008; van Dijk, 2008; Kuhanen et al., 2008; Evans, 2010). Over the past years there has been a steady increase in studies that has focussed on coping and resilience of children and young people. Many of these studies have identified resilience-related factors through quantitative ecological approaches to research. To date, there seems to be very few qualitative studies that have been undertaken to delineate the construct of resilience in child and youth-headed families within the South African context from the perspectives of children and young people growing up in these families (Beeka, 2008; Nkomo, 2008; Leatham, 2005). McCubbin (1999, in Smith 2006:48) argues that qualitative research is well suited to understanding processes and strategies in the study of resilience. This study therefore corresponds to McCubbin‟ calling by employing a qualitative research to the study of resilience in youth-headed families. The first goal of this study was to gain a deeper understanding of the experiences and needs of youth-headed families in Port Elizabeth, South Africa, as well as to enhance understanding of the protective factors and processes within youth-headed families and their environment that enable them to cope with their circumstances. The secondary goal of this study was to formulate practice guidelines for supporting members of youth-headed families that could be used by social workers and other service providers rendering services to these families in order to enhance their coping and resilience. The following objectives were formulated to guide the research process: - To explore and describe the experiences and needs of youth-headed families; - To explore the perceptions of community members regarding the needs of youth-headed families, as well as their perceptions regarding how these needs are addressed at community level; - To identify and describe the protective factors and/or processes within individual members of youth-headed families, their families and community context that promote the coping and resilience of youth-headed families; - To explore the views of service providers rendering services to youth-headed families regarding the nature of interventions and programmes rendered to these families; - To review the literature on existing family support programmes in order to identify good practice examples to inform the formulation of practice guidelines for supporting members of youth-headed families.
- Full Text:
- Date Issued: 2013
- Authors: Soji, Zoleka
- Date: 2013
- Subjects: Child support -- South Africa , Child caregivers -- South Africa , Orphans -- Care -- South Africa , Child welfare -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:10004 , http://hdl.handle.net/10948/d1016381
- Description: The topic of the research is derived from the researcher‟s own interest as a social worker and observations of reality within youth-headed families. Over the past few years the number of published studies on child and youth-headed households has grown out of the realisation that this multi-faceted phenomenon is growing in numbers and complexity. Most of these studies and reports concentrate on the issue of scale and the severity of the crisis of child and youth-headed households (UNICEF, 2002; Maqoko & Dryer, 2007 & Kuhanen, Shemeikka, Notkola & Nghixulifwa, 2008). These studies reveal the complex nature of the phenomenon of child and youth-headed families and the challenges that face young people within these families which impact on their growth and development. In most of the studies, the phenomenon of child and youth-headed households has been reported to have an impact on societal framework as a result of its complexity (UNICEF, 2002, 2008; van Dijk, 2008; Kuhanen et al., 2008; Evans, 2010). Over the past years there has been a steady increase in studies that has focussed on coping and resilience of children and young people. Many of these studies have identified resilience-related factors through quantitative ecological approaches to research. To date, there seems to be very few qualitative studies that have been undertaken to delineate the construct of resilience in child and youth-headed families within the South African context from the perspectives of children and young people growing up in these families (Beeka, 2008; Nkomo, 2008; Leatham, 2005). McCubbin (1999, in Smith 2006:48) argues that qualitative research is well suited to understanding processes and strategies in the study of resilience. This study therefore corresponds to McCubbin‟ calling by employing a qualitative research to the study of resilience in youth-headed families. The first goal of this study was to gain a deeper understanding of the experiences and needs of youth-headed families in Port Elizabeth, South Africa, as well as to enhance understanding of the protective factors and processes within youth-headed families and their environment that enable them to cope with their circumstances. The secondary goal of this study was to formulate practice guidelines for supporting members of youth-headed families that could be used by social workers and other service providers rendering services to these families in order to enhance their coping and resilience. The following objectives were formulated to guide the research process: - To explore and describe the experiences and needs of youth-headed families; - To explore the perceptions of community members regarding the needs of youth-headed families, as well as their perceptions regarding how these needs are addressed at community level; - To identify and describe the protective factors and/or processes within individual members of youth-headed families, their families and community context that promote the coping and resilience of youth-headed families; - To explore the views of service providers rendering services to youth-headed families regarding the nature of interventions and programmes rendered to these families; - To review the literature on existing family support programmes in order to identify good practice examples to inform the formulation of practice guidelines for supporting members of youth-headed families.
- Full Text:
- Date Issued: 2013
Predicted mbira found
- Authors: Tracey, Andrew
- Date: 2013
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59732 , vital:27643 , http://dx.doi.org/10.21504/amj.v9i3.1908
- Description: This article is written as a follow-up to my article “The original African mbira?” (1972). I can report that an instrument which I predicted to have existed in that article actually did/does exist! In the original article I compared the tuning layouts of two related present-day members of the mbira family, hera, also called matepe, (found in northern Zimbabwe and northeast Zimbabwe into Mozambique) and nyonganyonga (found in central Mozambique, from Mutare, Zimbabwe to Beira, Mozambique and also into southern Malawi).
- Full Text:
- Date Issued: 2013
- Authors: Tracey, Andrew
- Date: 2013
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59732 , vital:27643 , http://dx.doi.org/10.21504/amj.v9i3.1908
- Description: This article is written as a follow-up to my article “The original African mbira?” (1972). I can report that an instrument which I predicted to have existed in that article actually did/does exist! In the original article I compared the tuning layouts of two related present-day members of the mbira family, hera, also called matepe, (found in northern Zimbabwe and northeast Zimbabwe into Mozambique) and nyonganyonga (found in central Mozambique, from Mutare, Zimbabwe to Beira, Mozambique and also into southern Malawi).
- Full Text:
- Date Issued: 2013
Preface: Douglas Livingstone's prose writings
- Authors: Klopper, Dirk
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/458588 , vital:75754 , https://hdl.handle.net/10520/EJC152172
- Description: I should like to thank Stephen Gray for his conception of this collection of the prose writings of Douglas Livingstone and his judicious selection of items; Mariss Stevens for her detailed description of the NELM collection of Livingstone's papers; and NELM staff for their compilation of the bibliography.
- Full Text:
- Date Issued: 2013
- Authors: Klopper, Dirk
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/458588 , vital:75754 , https://hdl.handle.net/10520/EJC152172
- Description: I should like to thank Stephen Gray for his conception of this collection of the prose writings of Douglas Livingstone and his judicious selection of items; Mariss Stevens for her detailed description of the NELM collection of Livingstone's papers; and NELM staff for their compilation of the bibliography.
- Full Text:
- Date Issued: 2013
Pregnant teenagers' readiness for motherhood: a quantitative investigation in Nkonkobe Municipality, Eastern Cape
- Authors: Pitso, Tsolo Joseph
- Date: 2013
- Subjects: Teenage mothers -- South Africa -- Eastern Cape , Teenage parents -- South Africa -- Eastern Cape , Teenage pregnancy -- South Africa -- Eastern Cape , Motherhood -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Soc Sc (Psych)
- Identifier: vital:11614 , http://hdl.handle.net/10353/d1006289 , Teenage mothers -- South Africa -- Eastern Cape , Teenage parents -- South Africa -- Eastern Cape , Teenage pregnancy -- South Africa -- Eastern Cape , Motherhood -- South Africa -- Eastern Cape
- Description: The issue of teenage motherhood has been a concern, globally, continentally and locally. The quantitative study assessed whether the pregnant teenagers were ready for motherhood. This report analysed the current positions of women whose first child was to be born when they were teenagers in the rural Eastern Cape setting. The structured questionnaires were given to 106 pregnant teenagers who visited the War Memorial clinic for pregnancy check-up and convenient sampling was used to select these respondents. The items of the questionnaire were divided into the following sub-topics: prenatal and postnatal challenges and roles and responsibilities of motherhood. The study found that most of the pregnant teenagers were aware of the prenatal and postnatal challenges but they were not ready to perform the roles and responsibilities associated with motherhood. The analysis of data was divided in terms of descriptive and inferential statistics. The binary regression model was used to assess the factors affecting the pregnant teenagers’ readiness for motherhood. The finding of this study indicated that most (about 79 percent) of the pregnant teenagers were not aware of the roles and responsibilities of motherhood In addition to being not ready to face the psycho-social challenges of motherhood. Hence they indicated low level of readiness to motherhood. The psycho-social theory of Erikson posited that children who had strong and intact psycho-social relationships with the caregivers might have a high possibility of acquiring their identity during adolescent stage and this will help them to interact both effectively and efficiently with their peers and the society at large. While those do had negative psycho-social development have a high chance of facing identity crisis/confusion. As a result, they might lead them to being victims of psycho-social interaction such as early pregnancy.
- Full Text:
- Date Issued: 2013
- Authors: Pitso, Tsolo Joseph
- Date: 2013
- Subjects: Teenage mothers -- South Africa -- Eastern Cape , Teenage parents -- South Africa -- Eastern Cape , Teenage pregnancy -- South Africa -- Eastern Cape , Motherhood -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Soc Sc (Psych)
- Identifier: vital:11614 , http://hdl.handle.net/10353/d1006289 , Teenage mothers -- South Africa -- Eastern Cape , Teenage parents -- South Africa -- Eastern Cape , Teenage pregnancy -- South Africa -- Eastern Cape , Motherhood -- South Africa -- Eastern Cape
- Description: The issue of teenage motherhood has been a concern, globally, continentally and locally. The quantitative study assessed whether the pregnant teenagers were ready for motherhood. This report analysed the current positions of women whose first child was to be born when they were teenagers in the rural Eastern Cape setting. The structured questionnaires were given to 106 pregnant teenagers who visited the War Memorial clinic for pregnancy check-up and convenient sampling was used to select these respondents. The items of the questionnaire were divided into the following sub-topics: prenatal and postnatal challenges and roles and responsibilities of motherhood. The study found that most of the pregnant teenagers were aware of the prenatal and postnatal challenges but they were not ready to perform the roles and responsibilities associated with motherhood. The analysis of data was divided in terms of descriptive and inferential statistics. The binary regression model was used to assess the factors affecting the pregnant teenagers’ readiness for motherhood. The finding of this study indicated that most (about 79 percent) of the pregnant teenagers were not aware of the roles and responsibilities of motherhood In addition to being not ready to face the psycho-social challenges of motherhood. Hence they indicated low level of readiness to motherhood. The psycho-social theory of Erikson posited that children who had strong and intact psycho-social relationships with the caregivers might have a high possibility of acquiring their identity during adolescent stage and this will help them to interact both effectively and efficiently with their peers and the society at large. While those do had negative psycho-social development have a high chance of facing identity crisis/confusion. As a result, they might lead them to being victims of psycho-social interaction such as early pregnancy.
- Full Text:
- Date Issued: 2013
Preliminary assessment of the gender aspects of disaster vulnerability and loss of human life in South Africa
- Tandlich, Roman, Chirenda, Tatenda G, Srinivas, Sunitha C
- Authors: Tandlich, Roman , Chirenda, Tatenda G , Srinivas, Sunitha C
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/76183 , vital:30518 , https://doi.org/10.4102/jamba.v5i2.84
- Description: South Africa has reached a medium level of human development and has a heterogeneous situation with respect to disaster risk management. In this article, a preliminary assessment of the gender aspects of disaster vulnerability and fatalities is presented. The United Nations, the Health Systems Trust and Statistics South Africa were used as data sources for the following gender-segregated values: the life expectancy at birth, unemployment rates, the human development index values, the maternal mortality rates and the number of deaths from unnatural and non-natural causes. The relevant inequality indices were then calculated and used to draw conclusions regarding the gender aspects of disaster risk management in South Africa. Results of the calculations indicate that between 1980 and 2011 men were 10% more vulnerable with respect to their health status. However, the gender differences have been decreasing in recent years. Access of women to healthcare is decreasing with time, potentially decreasing the recovery potential of whole families. Women are more economically vulnerable than men in South Africa, as they are 16.3% – 33% more likely to be unemployed than men. Educational status of both genders in South Africa is comparable based on literacy and enrolment rates at primary and secondary level. On the other hand, men are five times more likely to suffer fatal injuries during disasters.
- Full Text:
- Date Issued: 2013
- Authors: Tandlich, Roman , Chirenda, Tatenda G , Srinivas, Sunitha C
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/76183 , vital:30518 , https://doi.org/10.4102/jamba.v5i2.84
- Description: South Africa has reached a medium level of human development and has a heterogeneous situation with respect to disaster risk management. In this article, a preliminary assessment of the gender aspects of disaster vulnerability and fatalities is presented. The United Nations, the Health Systems Trust and Statistics South Africa were used as data sources for the following gender-segregated values: the life expectancy at birth, unemployment rates, the human development index values, the maternal mortality rates and the number of deaths from unnatural and non-natural causes. The relevant inequality indices were then calculated and used to draw conclusions regarding the gender aspects of disaster risk management in South Africa. Results of the calculations indicate that between 1980 and 2011 men were 10% more vulnerable with respect to their health status. However, the gender differences have been decreasing in recent years. Access of women to healthcare is decreasing with time, potentially decreasing the recovery potential of whole families. Women are more economically vulnerable than men in South Africa, as they are 16.3% – 33% more likely to be unemployed than men. Educational status of both genders in South Africa is comparable based on literacy and enrolment rates at primary and secondary level. On the other hand, men are five times more likely to suffer fatal injuries during disasters.
- Full Text:
- Date Issued: 2013
Preliminary normative indications for Xhosa speaking unskilled workers on the Rey-Osterrieth complex figure test
- De Kock, Heinrich Karl Theodor
- Authors: De Kock, Heinrich Karl Theodor
- Date: 2013 , 2013-08-26
- Subjects: Rey-Osterrieth Complex Figure Test Educational tests and measurements Xhosa (African people) -- Education Neuropsychological tests -- Cross-cultural studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3130 , http://hdl.handle.net/10962/d1006476
- Description: The aim of this study was to establish preliminary normative indications for Rey-Osterrieth Complex Figure test administered in English on a non-clinical population of Xhosa, unskilled workers (N = 33). The population has a history of relatively poor quality education and has received no tertiary education. The sample was stratified into two age grouping (18 – 29 and 30 – 40 years). Both sex and level of education were equally distributed within these age groupings. Within-sample statistical comparisons indicated no significant sex effect was present for any of the trials (Copy, IR or DR). Similarly, no significant age effect was present in the Copy trial. Significant age effects were observed for both recall trials (IR and DR). The local sample’s mean performance was descriptively and statistically compared to demographically equivalent nonlocal normative studies. Excluding an illiterate Columbian sample’s performance, the local sample performed significantly lower than all other available normative populations. Lastly, the local sample performed significantly lower than scores derived from a meta-analysis of normative indications in respect of educationally advantaged westernized groups for all three trials (p = .000 in all instances). These results assert the indispensable need for, and use of, culturally appropriate normative datasets in contemporary South African psychological assessments. Equally, these findings serve to highlight the significant influence of quality of education on cognitive test performance, being a critical socio-cultural variable that needs to be taken into consideration for norming purposes.
- Full Text:
- Date Issued: 2013
- Authors: De Kock, Heinrich Karl Theodor
- Date: 2013 , 2013-08-26
- Subjects: Rey-Osterrieth Complex Figure Test Educational tests and measurements Xhosa (African people) -- Education Neuropsychological tests -- Cross-cultural studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3130 , http://hdl.handle.net/10962/d1006476
- Description: The aim of this study was to establish preliminary normative indications for Rey-Osterrieth Complex Figure test administered in English on a non-clinical population of Xhosa, unskilled workers (N = 33). The population has a history of relatively poor quality education and has received no tertiary education. The sample was stratified into two age grouping (18 – 29 and 30 – 40 years). Both sex and level of education were equally distributed within these age groupings. Within-sample statistical comparisons indicated no significant sex effect was present for any of the trials (Copy, IR or DR). Similarly, no significant age effect was present in the Copy trial. Significant age effects were observed for both recall trials (IR and DR). The local sample’s mean performance was descriptively and statistically compared to demographically equivalent nonlocal normative studies. Excluding an illiterate Columbian sample’s performance, the local sample performed significantly lower than all other available normative populations. Lastly, the local sample performed significantly lower than scores derived from a meta-analysis of normative indications in respect of educationally advantaged westernized groups for all three trials (p = .000 in all instances). These results assert the indispensable need for, and use of, culturally appropriate normative datasets in contemporary South African psychological assessments. Equally, these findings serve to highlight the significant influence of quality of education on cognitive test performance, being a critical socio-cultural variable that needs to be taken into consideration for norming purposes.
- Full Text:
- Date Issued: 2013
Prevalence and antibiotic resistance determinants of Escherichia coli pathotypes obtained from raw milk in two farms from the Eastern Cape, South Africa: public health implications
- Authors: Caine, Lesley-Anne
- Date: 2013
- Subjects: Raw Milk -- Escherichia coli , Polymerase -- Chain Reaction (PCR)
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11277 , http://hdl.handle.net/10353/d1015525 , Raw Milk -- Escherichia coli , Polymerase -- Chain Reaction (PCR)
- Description: Milk quality continues to be a topic of intense debate in the dairy industry, medical and public health communities. Production of maximum quantities of high-quality milk is an important goal of every dairy operation. High-quality milk must contain a low number of somatic cells and low bacteria count, and must be free of human pathogens and antibiotic residues. The objective of this study was to determine the prevalence of E. coli in unpasteurized milk recovered from Middledrift and Fort Hare dairy. In this study 400 milk samples were collected from two commercial farms (Middledrift and Fort Hare) in the Eastern Cape, South Africa, 200 raw milk samples from each farm. Samples were cultured on violet red bile mug-agar (VRB-MUG Agar) and incubated at 37ºC for 24 hours and preliminary identified by Gram stain and catalase test. Isolates that were Gram negative and catalase positive were screened for a marker of E. coli uidA gene using PCR assays. Middledrift dairy farm had 50 (25%) E. coli isolated from raw milk and Fort Hare farm showed 37 (18.5%) E. coli present in the milk samples. The presence of E. coli found in the milk samples points to the fact that fecal contamination was unavoidable and traditional practices are likely to contribute to the contamination of the milk and proliferation of the microorganisms.
- Full Text:
- Date Issued: 2013
- Authors: Caine, Lesley-Anne
- Date: 2013
- Subjects: Raw Milk -- Escherichia coli , Polymerase -- Chain Reaction (PCR)
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11277 , http://hdl.handle.net/10353/d1015525 , Raw Milk -- Escherichia coli , Polymerase -- Chain Reaction (PCR)
- Description: Milk quality continues to be a topic of intense debate in the dairy industry, medical and public health communities. Production of maximum quantities of high-quality milk is an important goal of every dairy operation. High-quality milk must contain a low number of somatic cells and low bacteria count, and must be free of human pathogens and antibiotic residues. The objective of this study was to determine the prevalence of E. coli in unpasteurized milk recovered from Middledrift and Fort Hare dairy. In this study 400 milk samples were collected from two commercial farms (Middledrift and Fort Hare) in the Eastern Cape, South Africa, 200 raw milk samples from each farm. Samples were cultured on violet red bile mug-agar (VRB-MUG Agar) and incubated at 37ºC for 24 hours and preliminary identified by Gram stain and catalase test. Isolates that were Gram negative and catalase positive were screened for a marker of E. coli uidA gene using PCR assays. Middledrift dairy farm had 50 (25%) E. coli isolated from raw milk and Fort Hare farm showed 37 (18.5%) E. coli present in the milk samples. The presence of E. coli found in the milk samples points to the fact that fecal contamination was unavoidable and traditional practices are likely to contribute to the contamination of the milk and proliferation of the microorganisms.
- Full Text:
- Date Issued: 2013
Prevalence of sustainability reporting practices of a sample of listed companies on established and emerging stock exchanges
- Turk, Brendan K, Shackleton, Charlie M, Whittington-Jones, Kevin J
- Authors: Turk, Brendan K , Shackleton, Charlie M , Whittington-Jones, Kevin J
- Date: 2013
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/60995 , vital:27908 , DOI: https://doi.org/10.4102/sajems.v16i1.234
- Description: The business sector has a substantial role in addressing current environmental issues and concerns. Consequently, there is a growing adoption of corporate sustainability principles and practices across all market sectors. This study examined four developed and four emerging stock markets and the sustainability reporting practices of the top 20 and bottom 20 companies in each. The results illustrate that the developed market sector was more advanced in its corporate sustainability reporting, both in the proportion of companies issuing a sustainability report (approximately 60 per cent) and the proportion of company webpages dedicated to sustainability reporting. This difference was largely due to the effect of the top 20 companies. There was little difference between developed and developing markets when only the bottom 20 companies were considered, of which less than one-third provided sustainability reports. These results show that sustainability reporting is prevalent in both developed and developing markets, especially among market leading companies, but that overall, most developing markets have some catching up to do.
- Full Text:
- Date Issued: 2013
- Authors: Turk, Brendan K , Shackleton, Charlie M , Whittington-Jones, Kevin J
- Date: 2013
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/60995 , vital:27908 , DOI: https://doi.org/10.4102/sajems.v16i1.234
- Description: The business sector has a substantial role in addressing current environmental issues and concerns. Consequently, there is a growing adoption of corporate sustainability principles and practices across all market sectors. This study examined four developed and four emerging stock markets and the sustainability reporting practices of the top 20 and bottom 20 companies in each. The results illustrate that the developed market sector was more advanced in its corporate sustainability reporting, both in the proportion of companies issuing a sustainability report (approximately 60 per cent) and the proportion of company webpages dedicated to sustainability reporting. This difference was largely due to the effect of the top 20 companies. There was little difference between developed and developing markets when only the bottom 20 companies were considered, of which less than one-third provided sustainability reports. These results show that sustainability reporting is prevalent in both developed and developing markets, especially among market leading companies, but that overall, most developing markets have some catching up to do.
- Full Text:
- Date Issued: 2013
Principles of South African prison law and proposals for their implementation
- Authors: Hornigold, Angus Lloyd
- Date: 2013
- Subjects: Prisons -- Law and legislation -- South Africa
- Language: English
- Type: Thesis , Doctoral , LLD
- Identifier: vital:10297 , http://hdl.handle.net/10948/d1021033
- Description: There are two broad areas of prisoner rights law that require development. The first area is that of the development of a common law framework with which to analyse disputes regarding the rights of prisoners. The second relates to the significant tension that exists between the conditions of detention that the Correctional Services Act envisages and the actual conditions of detention in South Africa prisons. This second aspect requires that a mechanism be created for the meaningful exercise of rights by prisoners. As a precursor to both of the above discussions it is necessary to understand the history of prisons and the intentions of those who designed this form of punishment. As will be illustrated there tends to be to-and-fro shift in intention on the part of the authorities between those who intend imprisonment as a humane form of punishment which seeks to reform the offender and the subsequent despair of that project of reformation with a resultant focus on security and mere detention of the offender. It is also a history of conditions of detention that are generally inhumane. These poor conditions are sometimes caused by neglect on the part of the authorities but ofttimes caused by the belief that harsh conditions of detention are a deterrent to wouldbe offenders. The advent of human rights law has placed an increasingly more onerous responsibility on the state to care for the well-being of prisoners whilst in custody. This duty includes, but is not limited to, the duty to care for the prisoner’s mental and physical health, ensure that they are safe from physical violence both from fellow prisoners and staff as well as a duty to ensure that they receive the necessities of life. Various failures by the state have led to increased litigation against the state. This will continue to create an ever increasing burden on the state as the number of long term prisoners increase and damages awards are made by the courts, in favour of prisoners, against the state for various reasons. These reasons include diseases contracted by prisoners whilst in custody and constitutional damages following death in custody. It is therefore necessary to develop a clear framework with which to analyse such disputes so that decisions are made which are consistent with the principles of South African law. It is this framework which this study seeks to develop. In order to do this the relevant principles of both international prison law as well as South African law will be drawn upon. In this regard the importance of the purposes of punishment will be emphasized when engaging upon an analysis of the limitations of the rights of a person in the context of prison law. Secondly, even though a sound framework may be developed with which to analyse prisoner rights there is still the difficulty of putting a system into operation which provides a mechanism through which prisoners can exercise those rights in a meaningful way. In order to create such a system there must be recognition of the impact of criminogenic conditions of imprisonment, the purposes of punishment and the values of the South African constitution. In this regard the principles of reductionism and restorative justice are considered. Furthermore, the role of special masters will be debated and amendments to the existing legislation will be proposed.
- Full Text:
- Date Issued: 2013
- Authors: Hornigold, Angus Lloyd
- Date: 2013
- Subjects: Prisons -- Law and legislation -- South Africa
- Language: English
- Type: Thesis , Doctoral , LLD
- Identifier: vital:10297 , http://hdl.handle.net/10948/d1021033
- Description: There are two broad areas of prisoner rights law that require development. The first area is that of the development of a common law framework with which to analyse disputes regarding the rights of prisoners. The second relates to the significant tension that exists between the conditions of detention that the Correctional Services Act envisages and the actual conditions of detention in South Africa prisons. This second aspect requires that a mechanism be created for the meaningful exercise of rights by prisoners. As a precursor to both of the above discussions it is necessary to understand the history of prisons and the intentions of those who designed this form of punishment. As will be illustrated there tends to be to-and-fro shift in intention on the part of the authorities between those who intend imprisonment as a humane form of punishment which seeks to reform the offender and the subsequent despair of that project of reformation with a resultant focus on security and mere detention of the offender. It is also a history of conditions of detention that are generally inhumane. These poor conditions are sometimes caused by neglect on the part of the authorities but ofttimes caused by the belief that harsh conditions of detention are a deterrent to wouldbe offenders. The advent of human rights law has placed an increasingly more onerous responsibility on the state to care for the well-being of prisoners whilst in custody. This duty includes, but is not limited to, the duty to care for the prisoner’s mental and physical health, ensure that they are safe from physical violence both from fellow prisoners and staff as well as a duty to ensure that they receive the necessities of life. Various failures by the state have led to increased litigation against the state. This will continue to create an ever increasing burden on the state as the number of long term prisoners increase and damages awards are made by the courts, in favour of prisoners, against the state for various reasons. These reasons include diseases contracted by prisoners whilst in custody and constitutional damages following death in custody. It is therefore necessary to develop a clear framework with which to analyse such disputes so that decisions are made which are consistent with the principles of South African law. It is this framework which this study seeks to develop. In order to do this the relevant principles of both international prison law as well as South African law will be drawn upon. In this regard the importance of the purposes of punishment will be emphasized when engaging upon an analysis of the limitations of the rights of a person in the context of prison law. Secondly, even though a sound framework may be developed with which to analyse prisoner rights there is still the difficulty of putting a system into operation which provides a mechanism through which prisoners can exercise those rights in a meaningful way. In order to create such a system there must be recognition of the impact of criminogenic conditions of imprisonment, the purposes of punishment and the values of the South African constitution. In this regard the principles of reductionism and restorative justice are considered. Furthermore, the role of special masters will be debated and amendments to the existing legislation will be proposed.
- Full Text:
- Date Issued: 2013
Probing the sensitive and selective luminescent detection of peroxynitrite using thiol-capped CdTe and CdTe@ ZnS quantum dots
- Adegoke, Oluwasesan, Nyokong, Tebello
- Authors: Adegoke, Oluwasesan , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/193757 , vital:45393 , xlink:href="https://doi.org/10.1016/j.jlumin.2012.08.002"
- Description: CdTe and CdTe@ZnS quantum dots (QDs) capped with 3-mercaptopropionic acid (MPA), thioglycolic acid (TGA), or glutathione (GSH) have been employed for the first time as luminescent probes for the sensitive and selective detection of peroxynitrite (ONOO−) in aqueous solution. The sensitivity of the proposed probe followed the order: MPA–TGA–CdTe@ZnS>GSH–TGA–CdTe@ZnS>MPA–CdTe QDs. The varying degree of quenching is elucidated based on the QD–thiolate bond of CdTe@ZnS being more sensitive to oxidation from ONOO− than CdTe. The selectivity of the probe in the presence of co-existing species followed the order: GSH–TGA–CdTe@ZnS>MPA–TGA–CdTe@ZnS>MPA–CdTe QDs. QDs capped with MPA showed less selectivity for ONOO− than GSH. The best limit of detection (LOD) of 12.6 nM was obtained for MPA–TGA–CdTe@ZnS QDs. Time-resolved fluorescence measurements indicated that the interaction between ONOO− and the QDs is static in nature.
- Full Text:
- Date Issued: 2013
- Authors: Adegoke, Oluwasesan , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/193757 , vital:45393 , xlink:href="https://doi.org/10.1016/j.jlumin.2012.08.002"
- Description: CdTe and CdTe@ZnS quantum dots (QDs) capped with 3-mercaptopropionic acid (MPA), thioglycolic acid (TGA), or glutathione (GSH) have been employed for the first time as luminescent probes for the sensitive and selective detection of peroxynitrite (ONOO−) in aqueous solution. The sensitivity of the proposed probe followed the order: MPA–TGA–CdTe@ZnS>GSH–TGA–CdTe@ZnS>MPA–CdTe QDs. The varying degree of quenching is elucidated based on the QD–thiolate bond of CdTe@ZnS being more sensitive to oxidation from ONOO− than CdTe. The selectivity of the probe in the presence of co-existing species followed the order: GSH–TGA–CdTe@ZnS>MPA–TGA–CdTe@ZnS>MPA–CdTe QDs. QDs capped with MPA showed less selectivity for ONOO− than GSH. The best limit of detection (LOD) of 12.6 nM was obtained for MPA–TGA–CdTe@ZnS QDs. Time-resolved fluorescence measurements indicated that the interaction between ONOO− and the QDs is static in nature.
- Full Text:
- Date Issued: 2013
Problems encountered by educators in the implementation of integrated quality management system (IQMS) in selected schools in the Butterworth Education District
- Authors: Memani, Theorine Nontando
- Date: 2013
- Subjects: Integrated quality management system -- Schools
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:18449 , http://hdl.handle.net/11260/d1007304
- Description: The study sought to investigate problems encountered by educators in the implementation of IQMS in selected schools in the Butterworth Education District. The study emerged out of an agreement reached by the Department of Education, Education Labour Relation Council, unions and stakeholders (ELRC, 2003) that Integrated Quality Management System (IQMS) be a developmental programme for quality performance in teaching and learning in public schools. The programme was based on the merging of three programmes, namely the Developmental Appraisal System (DAS), Performance Management System (PMS) and Whole School Evaluation (WSE) which were integrated in the implementation of IQMS (Resolution No.8 of 2003).The first three programmes, DAS, PMS and WSE, were less effective and had some flaws that caused implementers (educators) not to accept them as performance developmental programmes as they were punitive and judgmental. The researcher was interested in investigating those problems encountered by the educators in the implementation of IQMS. The study employed a qualitative research methodology with a qualitative survey design. Structured interviews were used to collect data. Five (5) schools out of three hundred and twenty five schools (325) in the Butterworth Education District were conveniently selected. From each school a sample of five (5) educators was purposively selected according to their duty lines on the IQMS structures, i.e. principal, school coordinator and three educators, for the purpose of getting relevant information from each level. Some of the main findings of the study were: the duration of the training was too short; unclear roles and responsibilities of role-players resulted in non-implementation of the programme; attachment of incentive to the programme made educators to focus on the incentives rather than on the programme and the heavy workload of educators hindered the implementation of IQMS. The researcher recommended that administrators/clerks be employed as a matter of urgency to all schools in order to lessen the educators’ workload especially the principals, for the benefit of accomplishing the objectives of IQMS programmes. Re-training was absolutely a necessity. Delinking of incentives to the development programme was a crucial issue. The researcher also recommended that the IQMS Departmental Officials should monitor the implementation of the programme timeuosly so as to tackle the problems in their premature stages. The improvement of working conditions in schools is essential. Key words: quality performance; quality management; quality performance measurement and quality implementation of IQMS programme.
- Full Text:
- Date Issued: 2013
- Authors: Memani, Theorine Nontando
- Date: 2013
- Subjects: Integrated quality management system -- Schools
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:18449 , http://hdl.handle.net/11260/d1007304
- Description: The study sought to investigate problems encountered by educators in the implementation of IQMS in selected schools in the Butterworth Education District. The study emerged out of an agreement reached by the Department of Education, Education Labour Relation Council, unions and stakeholders (ELRC, 2003) that Integrated Quality Management System (IQMS) be a developmental programme for quality performance in teaching and learning in public schools. The programme was based on the merging of three programmes, namely the Developmental Appraisal System (DAS), Performance Management System (PMS) and Whole School Evaluation (WSE) which were integrated in the implementation of IQMS (Resolution No.8 of 2003).The first three programmes, DAS, PMS and WSE, were less effective and had some flaws that caused implementers (educators) not to accept them as performance developmental programmes as they were punitive and judgmental. The researcher was interested in investigating those problems encountered by the educators in the implementation of IQMS. The study employed a qualitative research methodology with a qualitative survey design. Structured interviews were used to collect data. Five (5) schools out of three hundred and twenty five schools (325) in the Butterworth Education District were conveniently selected. From each school a sample of five (5) educators was purposively selected according to their duty lines on the IQMS structures, i.e. principal, school coordinator and three educators, for the purpose of getting relevant information from each level. Some of the main findings of the study were: the duration of the training was too short; unclear roles and responsibilities of role-players resulted in non-implementation of the programme; attachment of incentive to the programme made educators to focus on the incentives rather than on the programme and the heavy workload of educators hindered the implementation of IQMS. The researcher recommended that administrators/clerks be employed as a matter of urgency to all schools in order to lessen the educators’ workload especially the principals, for the benefit of accomplishing the objectives of IQMS programmes. Re-training was absolutely a necessity. Delinking of incentives to the development programme was a crucial issue. The researcher also recommended that the IQMS Departmental Officials should monitor the implementation of the programme timeuosly so as to tackle the problems in their premature stages. The improvement of working conditions in schools is essential. Key words: quality performance; quality management; quality performance measurement and quality implementation of IQMS programme.
- Full Text:
- Date Issued: 2013
Process heat flow model for temperature and hardness prediction during friction taper stud welding of AISI 4140
- Van Zyl, Carlo Angelo Antonio
- Authors: Van Zyl, Carlo Angelo Antonio
- Date: 2013
- Subjects: Friction welding Pressure welding
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/47780 , vital:40373
- Description: Friction Taper Stud Welding (FTSW) is a relatively new solid state welding process, developed from the concepts of friction welding, which theoretically operates below the melting temperatures of the material being welded. During friction welding, heat is generated by conversion of mechanical energy into thermal energy at the interface of the work pieces, during rotation under pressure. Quality welds are dependant on the correct selection of welding process parameters, which are currently chosen empirically, and the FTSW evaluated by mechanical testing. This method is time consuming, uneconomical and could cause that optimised conditions are overlooked. A proposed solution would be to numerically model the process, but reference to successful computational modelling of the FTSW process is currently not available and data regarding the responses during the process are limited. The ultimate aim of the present study is to develop a finite element model to simulate the FTSW process using AISI 4140 medium carbon low alloy steel, delivering temperature profiles and hardness predictions through the Heat Affected Zone (HAZ) – using a combined experimental and numerical study. To achieve the objectives of this study a systematic approach was adopted and conducted in several phases. A weld matrix was configured with ranging weld input parameters to determine the affect of weld input parameters on real-time responses. To provide a relationship between these factors, welding was conducted using a portable friction taper stud welding platform linked to a control and data logging system for measuring the real time axial forces, spindle speed, material displacement, torque and temperature responses as a function of time. The input process parameters applied being motor speed, axial forces, displacement and forging time. The temperature distribution through the weld, by direct measurement, as a function of weld time and position is investigated. During the experimental welds temperature responses, as influenced by welding parameters, were recorded using embedded N-Type thermocouples at various locations in the near vicinity of the weld interface. The main hot spots during welding were identified to be close to the top surface just before weld completion and at the bottom centre surface of the plug weld at the interface line. All the welds showed similar trends and a maximum temperature of 1078°C at the bottom of the weld was reached for a rotational tool speed of 5160rpm, axial friction force of 15kN and displacement of 6.5mm, due to the heat generated by friction between the tool and weld coupon. The weld torque increase rapidly at the start of the weld and reached a peak value shortly after the start of the weld, while a peak temperature of 1366°C, for a rotational tool speed of 5160rpm, axial friction force of 10kN and displacement of 8mm was reached at the top edge of the plug weld. This position of anticipated peak temperature value is due to the heat transferred during the FTSW process together with the accumulation of expelled material forming on the surface of the weld coupon. Statistical methods were applied to obtain knowledge of the trends and relationship between weld input parameters for various weld responses, including energy input, temperature, friction time, torque and displacement rate. Although it was shown that no single parameter solely controls the temperature gradients in the weld, the dominant influence of the rotational speed at the bottom of the weld and that of the displacement, at the top of the weld, were evident. The peak temperatures during the weld are of interest as these temperatures, together with the subsequent cooling rates, determine the Vickers hardness, of the material, through the weld. Spindle speed was found to have the dominant effect on temperature in the bottom half of the weld with displacement having a contributive effect closer to the top of the weld. Friction force dominate the effect on friction time, displacement rate and total energy input with friction force and spindle speed having an equal effect on torque. The multiple regression analysis resulted in valid models with varied, but acceptable accuracy with the equation for friction time resulting in an R predict value of 93.34%. These models provided a clear insight to the influence of weld input parameters on the weld responses and the model for friction time was used as an input parameter to the FTS welding simulation. The accurate prediction of the interface temperature is fundamental for process optimisation which will allow for producing consistent, reliable plug welds. A fully coupled transient two-dimensional axi-symmetrical analysis of heat flow during the FTSW process of AISI 4140 steel and subsequent Vickers hardness profiles through the HAZ, making use of numeric simulation applied in the commercially available FEA software, COMSOL Multiphysics®, is developed and reported on. Process optimisation hinges on a better understanding of the heat distribution during welding, making a major contribution to the resultant hardness. The thermal-plastic flow coupling of the model is such that temperature values are resolved together with that of the velocity field. The simulation utilises a Computational Fluid Dynamics (CFD) two phase laminar flow and Heat Transfer physics, applied in an Eulerian mesh-based scheme. The viscosity of the fluid is based on a constitutive law of the flow stress using the Zener-Hollomon parameter with a flow model based on the Navier-Stokes’ equations to simulate the plastic deformation. Temperature dependant thermo-physical material properties and coefficient of friction are applied, and the application of viscous heating is controlled by a material state variable. The heat source model, required for material softening, is applied as two components, frictional and shear, with the heat source moving along the z-axis delivering sufficient energy to soften the metal, causing flow. The Navier-Stokes approach is applied with solid-state material transport during the weld based on laminar, viscous flow of a non-Newtonian fluid, dependant on temperature and strain rate. Numerically calculated values for temperature profiles and peak temperatures through to the weld as well as subsequent Vickers hardness profiles at points through the HAZ, obtained from the Finite Element model, were found to be in close agreement with values from trial welds. The largest variance was 19% for the peak temperature of weld E4W2, applying an axial friction force of 7.5kN, 6.5mm displacement and a tool rotational speed of 4080rpm – resulting in a friction time of 330 seconds. Predictions of hardness are found to be between 0% and 19% (mean 3%) of experimentally determined values with the biggest variance at the positions of peak temperatures due to the friction interfaces. The heat applied as a result of plastic deformation was found to be 5.4% of the total heat. The FTSW model predicts the temperatures at the friction interface, during the welding process, to be within the range, and frequently exceeding the solidus temperature of AISI 4140 steel. Results show that the models applied in the FTSW simulation show good agreement when compared to experimental values. The main contribution of this thesis, towards knowledge of the FTSW process, is: The relationships between weld input parameters and responses; Temperature dependant models of thermo-physical properties for AISI 4140 in the high temperature region (ranging from ambient to the solidus temperature); Successful application of the Navier-Stokes approach to simulate the plastic flow during FTSW and A numerical finite element model for the prediction of temperature gradients and hardness profiles through a FTSW.
- Full Text:
- Date Issued: 2013
- Authors: Van Zyl, Carlo Angelo Antonio
- Date: 2013
- Subjects: Friction welding Pressure welding
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/47780 , vital:40373
- Description: Friction Taper Stud Welding (FTSW) is a relatively new solid state welding process, developed from the concepts of friction welding, which theoretically operates below the melting temperatures of the material being welded. During friction welding, heat is generated by conversion of mechanical energy into thermal energy at the interface of the work pieces, during rotation under pressure. Quality welds are dependant on the correct selection of welding process parameters, which are currently chosen empirically, and the FTSW evaluated by mechanical testing. This method is time consuming, uneconomical and could cause that optimised conditions are overlooked. A proposed solution would be to numerically model the process, but reference to successful computational modelling of the FTSW process is currently not available and data regarding the responses during the process are limited. The ultimate aim of the present study is to develop a finite element model to simulate the FTSW process using AISI 4140 medium carbon low alloy steel, delivering temperature profiles and hardness predictions through the Heat Affected Zone (HAZ) – using a combined experimental and numerical study. To achieve the objectives of this study a systematic approach was adopted and conducted in several phases. A weld matrix was configured with ranging weld input parameters to determine the affect of weld input parameters on real-time responses. To provide a relationship between these factors, welding was conducted using a portable friction taper stud welding platform linked to a control and data logging system for measuring the real time axial forces, spindle speed, material displacement, torque and temperature responses as a function of time. The input process parameters applied being motor speed, axial forces, displacement and forging time. The temperature distribution through the weld, by direct measurement, as a function of weld time and position is investigated. During the experimental welds temperature responses, as influenced by welding parameters, were recorded using embedded N-Type thermocouples at various locations in the near vicinity of the weld interface. The main hot spots during welding were identified to be close to the top surface just before weld completion and at the bottom centre surface of the plug weld at the interface line. All the welds showed similar trends and a maximum temperature of 1078°C at the bottom of the weld was reached for a rotational tool speed of 5160rpm, axial friction force of 15kN and displacement of 6.5mm, due to the heat generated by friction between the tool and weld coupon. The weld torque increase rapidly at the start of the weld and reached a peak value shortly after the start of the weld, while a peak temperature of 1366°C, for a rotational tool speed of 5160rpm, axial friction force of 10kN and displacement of 8mm was reached at the top edge of the plug weld. This position of anticipated peak temperature value is due to the heat transferred during the FTSW process together with the accumulation of expelled material forming on the surface of the weld coupon. Statistical methods were applied to obtain knowledge of the trends and relationship between weld input parameters for various weld responses, including energy input, temperature, friction time, torque and displacement rate. Although it was shown that no single parameter solely controls the temperature gradients in the weld, the dominant influence of the rotational speed at the bottom of the weld and that of the displacement, at the top of the weld, were evident. The peak temperatures during the weld are of interest as these temperatures, together with the subsequent cooling rates, determine the Vickers hardness, of the material, through the weld. Spindle speed was found to have the dominant effect on temperature in the bottom half of the weld with displacement having a contributive effect closer to the top of the weld. Friction force dominate the effect on friction time, displacement rate and total energy input with friction force and spindle speed having an equal effect on torque. The multiple regression analysis resulted in valid models with varied, but acceptable accuracy with the equation for friction time resulting in an R predict value of 93.34%. These models provided a clear insight to the influence of weld input parameters on the weld responses and the model for friction time was used as an input parameter to the FTS welding simulation. The accurate prediction of the interface temperature is fundamental for process optimisation which will allow for producing consistent, reliable plug welds. A fully coupled transient two-dimensional axi-symmetrical analysis of heat flow during the FTSW process of AISI 4140 steel and subsequent Vickers hardness profiles through the HAZ, making use of numeric simulation applied in the commercially available FEA software, COMSOL Multiphysics®, is developed and reported on. Process optimisation hinges on a better understanding of the heat distribution during welding, making a major contribution to the resultant hardness. The thermal-plastic flow coupling of the model is such that temperature values are resolved together with that of the velocity field. The simulation utilises a Computational Fluid Dynamics (CFD) two phase laminar flow and Heat Transfer physics, applied in an Eulerian mesh-based scheme. The viscosity of the fluid is based on a constitutive law of the flow stress using the Zener-Hollomon parameter with a flow model based on the Navier-Stokes’ equations to simulate the plastic deformation. Temperature dependant thermo-physical material properties and coefficient of friction are applied, and the application of viscous heating is controlled by a material state variable. The heat source model, required for material softening, is applied as two components, frictional and shear, with the heat source moving along the z-axis delivering sufficient energy to soften the metal, causing flow. The Navier-Stokes approach is applied with solid-state material transport during the weld based on laminar, viscous flow of a non-Newtonian fluid, dependant on temperature and strain rate. Numerically calculated values for temperature profiles and peak temperatures through to the weld as well as subsequent Vickers hardness profiles at points through the HAZ, obtained from the Finite Element model, were found to be in close agreement with values from trial welds. The largest variance was 19% for the peak temperature of weld E4W2, applying an axial friction force of 7.5kN, 6.5mm displacement and a tool rotational speed of 4080rpm – resulting in a friction time of 330 seconds. Predictions of hardness are found to be between 0% and 19% (mean 3%) of experimentally determined values with the biggest variance at the positions of peak temperatures due to the friction interfaces. The heat applied as a result of plastic deformation was found to be 5.4% of the total heat. The FTSW model predicts the temperatures at the friction interface, during the welding process, to be within the range, and frequently exceeding the solidus temperature of AISI 4140 steel. Results show that the models applied in the FTSW simulation show good agreement when compared to experimental values. The main contribution of this thesis, towards knowledge of the FTSW process, is: The relationships between weld input parameters and responses; Temperature dependant models of thermo-physical properties for AISI 4140 in the high temperature region (ranging from ambient to the solidus temperature); Successful application of the Navier-Stokes approach to simulate the plastic flow during FTSW and A numerical finite element model for the prediction of temperature gradients and hardness profiles through a FTSW.
- Full Text:
- Date Issued: 2013
Production and characterization of a bioflocculant from a consortium of bacteria belonging to the halomonas and micrococcus genera
- Okaiyeto, Kunle (https://orcid.org/0000-0002-7211-714X)
- Authors: Okaiyeto, Kunle (https://orcid.org/0000-0002-7211-714X)
- Date: 2013
- Subjects: Flocculents , Bacteria
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/25822 , vital:64489
- Description: The physicochemical properties of two bioflocculant producing bacteria; Halomonas sp. Okoh and Micrococcus sp. Leo were investigated. The optimum culture conditions for the individual species were determined. All the growth conditions examined for the individual bacteria were similar. Glucose and ammonium sulphate as sole carbon and nitrogen sources respectively resulted in optimum production of bioflocculant. The flocculating activity of the bioflocculants was stimulated when Al3+ was used as the coagulating aid under acidic medium. The information obtained from individual strains was used to produce a bioflocculant from the consortium of the two bacteria. After purification, the bioflocculant yields from 1L fermentation broths were 1.213 g from Halomonas sp. Okoh, 0.738 g from Micrococcus sp. Leo and 3.51 g from the consortium. The chemical analyses of the purified bioflocculants showed that they were glycoproteins. The thermostability property of the bioflocculants was investigated between 50-100oC and the results revealed that they are heat-stable. Fourier transform infrared revealed the presence of hydroxyl, carboxyl and amino groups in the bioflocculant molecules. Scaning electron microscope (SEM) images showed the structure of each bioflocculant(s) and kaolin clay before and after flocculation. From the results obtained, the idea of using the two strains in consortium for bioflocculant production resulted in an improvement in terms of flocculating activity and yield. The bioflocculants appears to have promise as an alternative to chemical flocculants used in various industrial processes such as wastewater treatment and drinking water purification. , Thesis (MA) -- Science and Agriculture, 2013
- Full Text:
- Date Issued: 2013
- Authors: Okaiyeto, Kunle (https://orcid.org/0000-0002-7211-714X)
- Date: 2013
- Subjects: Flocculents , Bacteria
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/25822 , vital:64489
- Description: The physicochemical properties of two bioflocculant producing bacteria; Halomonas sp. Okoh and Micrococcus sp. Leo were investigated. The optimum culture conditions for the individual species were determined. All the growth conditions examined for the individual bacteria were similar. Glucose and ammonium sulphate as sole carbon and nitrogen sources respectively resulted in optimum production of bioflocculant. The flocculating activity of the bioflocculants was stimulated when Al3+ was used as the coagulating aid under acidic medium. The information obtained from individual strains was used to produce a bioflocculant from the consortium of the two bacteria. After purification, the bioflocculant yields from 1L fermentation broths were 1.213 g from Halomonas sp. Okoh, 0.738 g from Micrococcus sp. Leo and 3.51 g from the consortium. The chemical analyses of the purified bioflocculants showed that they were glycoproteins. The thermostability property of the bioflocculants was investigated between 50-100oC and the results revealed that they are heat-stable. Fourier transform infrared revealed the presence of hydroxyl, carboxyl and amino groups in the bioflocculant molecules. Scaning electron microscope (SEM) images showed the structure of each bioflocculant(s) and kaolin clay before and after flocculation. From the results obtained, the idea of using the two strains in consortium for bioflocculant production resulted in an improvement in terms of flocculating activity and yield. The bioflocculants appears to have promise as an alternative to chemical flocculants used in various industrial processes such as wastewater treatment and drinking water purification. , Thesis (MA) -- Science and Agriculture, 2013
- Full Text:
- Date Issued: 2013