Optimization of liposomes for enhanced stability against degradation by gastrointestinal fluid content
- Authors: Scholtz, Carla Chleo
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54117 , vital:46305
- Description: Motivation: Liposomes are nanoparticulate carriers consisting of a hydrophobic bilayer and a hydrophilic core. Their application as drug carrier systems arises from their unique physiochemical structure, biocompatibility and biodegradability. Their biphasic nature is significant in the delivery of peptide and protein drug molecules as it is thus able to encompass both hydrophobic and hydrophilic molecules. Liposomes are actively being used for drug delivery intravenously. These formulations have been successful in reducing side effects and improving therapeutic efficacy. However, the intravenous route poses many challenges and is not the preferred route of administration amongst patients. The oral route of administration is non-invasive, and administration is of ease, therefore it is the preferred route of administration amongst patients, especially those with complex medicine regimes. Problem: The gastrointestinal tract is a harsh environment. In order for liposomes to maintain their integrity during their course they require a level of stability against gastric and intestinal fluids and its associated constituents such as gastric and pancreatic enzymes, low pH and bile acid. Methodology: Based on recommendations extrapolated from literature, the incorporation of a bile salt, sodium glycocholate, into liposomes in conjunction with coating the surface with chitosan was selected as the optimization strategies to enhance the stability of liposomes against degradation in the gastrointestinal tract. Bilosomes with encapsulated calce in were produced using the thin-film hydration method and coated with chitosan. An in vitrocalce in release assay was conducted in simulated gastric and intestinal fluids which presented with in vivo conditions in terms of pH and enzymes and additional constituents such as a bile salt. Stability was determined by the extent of digestion within the simulated fluids with time. Results: Characterization results suggested that the addition of chitosan and sodium glycocholate to the liposomal formulation has significant effects on the physiochemical properties. The colloidal dispersions could not retain their stability during storage which was noticeable during HRTEM. Despite optimization of the liposomes, in vitro studies showed significant release in both simulated gastric and intestinal fluids, with majority release seen in the presence of pepsin and pancreatic, at low pH and in the presence of bile acid. , Thesis (MSc) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Scholtz, Carla Chleo
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54117 , vital:46305
- Description: Motivation: Liposomes are nanoparticulate carriers consisting of a hydrophobic bilayer and a hydrophilic core. Their application as drug carrier systems arises from their unique physiochemical structure, biocompatibility and biodegradability. Their biphasic nature is significant in the delivery of peptide and protein drug molecules as it is thus able to encompass both hydrophobic and hydrophilic molecules. Liposomes are actively being used for drug delivery intravenously. These formulations have been successful in reducing side effects and improving therapeutic efficacy. However, the intravenous route poses many challenges and is not the preferred route of administration amongst patients. The oral route of administration is non-invasive, and administration is of ease, therefore it is the preferred route of administration amongst patients, especially those with complex medicine regimes. Problem: The gastrointestinal tract is a harsh environment. In order for liposomes to maintain their integrity during their course they require a level of stability against gastric and intestinal fluids and its associated constituents such as gastric and pancreatic enzymes, low pH and bile acid. Methodology: Based on recommendations extrapolated from literature, the incorporation of a bile salt, sodium glycocholate, into liposomes in conjunction with coating the surface with chitosan was selected as the optimization strategies to enhance the stability of liposomes against degradation in the gastrointestinal tract. Bilosomes with encapsulated calce in were produced using the thin-film hydration method and coated with chitosan. An in vitrocalce in release assay was conducted in simulated gastric and intestinal fluids which presented with in vivo conditions in terms of pH and enzymes and additional constituents such as a bile salt. Stability was determined by the extent of digestion within the simulated fluids with time. Results: Characterization results suggested that the addition of chitosan and sodium glycocholate to the liposomal formulation has significant effects on the physiochemical properties. The colloidal dispersions could not retain their stability during storage which was noticeable during HRTEM. Despite optimization of the liposomes, in vitro studies showed significant release in both simulated gastric and intestinal fluids, with majority release seen in the presence of pepsin and pancreatic, at low pH and in the presence of bile acid. , Thesis (MSc) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
- Full Text:
- Date Issued: 2021-12
Optimizing herbicide-use for the killing of eucalypt stumps
- Authors: Mavhungu, Tshilidzi
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53857 , vital:46023
- Description: The South Africa (SA) forest industry relies on plantations of exotic forestry trees (Pinus, Acacia and Eucalyptus) to fulfil its timber requirements. With 52.0% of the afforested land in South Africa planted to various eucalypts and their hybrid combinations. Of the total area planted to eucalypts in SA, 75 000 ha is re-established annually by means of silvicultural regimes and operations matched to site productivity, desired end-product and method of regeneration. Unlike other commercially grown tree species, eucalypt species have the ability to coppice after felling. Coppicing is a common form of regeneration in South African forestry as it allows the plantation owner the option of a second timber rotation without replanting. However, if any factors affecting coppicing are compromised, and the site is to be replanted, then it is important to kill the stumps before replanting as rapid initial growth of the coppice shoots will require earlier control than that associated with normal weeding operations. Over time, various methods of woody plant control have been proposed and tested, with most of these making use of herbicides as opposed to the repeated manual removal of coppice regrowth. Globally, most industries subscribe to standards associated with sustainable production (economic, environmental and social) against which they are measured. Within SA, 80% of the forests are certified though either the Forest Stewardship Council (FSC) or International Standards Organisation (ISO) which recommend the identification and avoidance of ‘highly hazardous’ chemicals; the promotion of ‘non-chemical’ methods for pest management as an element of an integrated pest and vegetation management strategy; and the appropriate use of chemicals that are used. To test the current recommendations for killing eucalypt stumps to include other species, the potential of reducing herbicides used, and the influence of time after application on the survival of eucalypt stumps, two trials were initiated at Entabeni plantation (Venda, Limpopo) and one at Wilgeboom plantation (Bushbuckridge, Mpumalanga) between 2018 and 2020. Extending eucalypt cut-stump control practices: Most of the trial work on killing of eucalypts in SA has been conducted on Eucalyptus grandis, Eucalyptus camaldulensis or Eucalyptus macarthurii, with all grown on shorter pulpwood rotations. To extend current recommendation to include Eucalyptus cloeziana (grown on a longer rotation for poles), a trial was established in 2018 at Entabeni plantation (Limpopo Province) to quantify the interaction between Application method (basal-frill; cut-surface; foliar) and Herbicide (no herbicide applied; Roundup; Garlon; Roundup + Garlon) for the killing of 12 year-old stumps following harvesting. Assessments were carried out at 1, 3 and 6 months following application and included Stump survival, Stump quarter with coppice and Coppice heath. Relative to the control plots (100% survival), all herbicides tested were equally effective, 70–90% of the stumps killed. This study confirms previous research regarding the killing of eucalypt stumps. Roundup, Garlon or a combination of two, when applied according to label recommendations to a stump as a basal-frill or cut-surface application (within 30 minutes of felling) resulted in 70-90% of the stumps killed. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mavhungu, Tshilidzi
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53857 , vital:46023
- Description: The South Africa (SA) forest industry relies on plantations of exotic forestry trees (Pinus, Acacia and Eucalyptus) to fulfil its timber requirements. With 52.0% of the afforested land in South Africa planted to various eucalypts and their hybrid combinations. Of the total area planted to eucalypts in SA, 75 000 ha is re-established annually by means of silvicultural regimes and operations matched to site productivity, desired end-product and method of regeneration. Unlike other commercially grown tree species, eucalypt species have the ability to coppice after felling. Coppicing is a common form of regeneration in South African forestry as it allows the plantation owner the option of a second timber rotation without replanting. However, if any factors affecting coppicing are compromised, and the site is to be replanted, then it is important to kill the stumps before replanting as rapid initial growth of the coppice shoots will require earlier control than that associated with normal weeding operations. Over time, various methods of woody plant control have been proposed and tested, with most of these making use of herbicides as opposed to the repeated manual removal of coppice regrowth. Globally, most industries subscribe to standards associated with sustainable production (economic, environmental and social) against which they are measured. Within SA, 80% of the forests are certified though either the Forest Stewardship Council (FSC) or International Standards Organisation (ISO) which recommend the identification and avoidance of ‘highly hazardous’ chemicals; the promotion of ‘non-chemical’ methods for pest management as an element of an integrated pest and vegetation management strategy; and the appropriate use of chemicals that are used. To test the current recommendations for killing eucalypt stumps to include other species, the potential of reducing herbicides used, and the influence of time after application on the survival of eucalypt stumps, two trials were initiated at Entabeni plantation (Venda, Limpopo) and one at Wilgeboom plantation (Bushbuckridge, Mpumalanga) between 2018 and 2020. Extending eucalypt cut-stump control practices: Most of the trial work on killing of eucalypts in SA has been conducted on Eucalyptus grandis, Eucalyptus camaldulensis or Eucalyptus macarthurii, with all grown on shorter pulpwood rotations. To extend current recommendation to include Eucalyptus cloeziana (grown on a longer rotation for poles), a trial was established in 2018 at Entabeni plantation (Limpopo Province) to quantify the interaction between Application method (basal-frill; cut-surface; foliar) and Herbicide (no herbicide applied; Roundup; Garlon; Roundup + Garlon) for the killing of 12 year-old stumps following harvesting. Assessments were carried out at 1, 3 and 6 months following application and included Stump survival, Stump quarter with coppice and Coppice heath. Relative to the control plots (100% survival), all herbicides tested were equally effective, 70–90% of the stumps killed. This study confirms previous research regarding the killing of eucalypt stumps. Roundup, Garlon or a combination of two, when applied according to label recommendations to a stump as a basal-frill or cut-surface application (within 30 minutes of felling) resulted in 70-90% of the stumps killed. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
- Full Text:
- Date Issued: 2021-12
Perceptions of Nelson Mandela University social sciences post-graduate students on the decolonization of the social sciences modules
- Authors: Manduluka, Lubabalo
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54481 , vital:46603
- Description: This research project is motivated by the students 2015-2016 higher education student protest that called for the decolonization of higher education institutions. It is widely accepted that for university module to serve students properly, it should be relevant to students it should be and must be localised. The research study considered the perceptions of post-graduate students on the decolonization of social sciences modules from the Nelson Mandela University. The objectives of the study are as follows: to investigate the perception of post-graduate students based within the School of Social Sciences on the decolonization of the social sciences modules at the Nelson Mandela University at South campus. To come up with recommendations with the view of addressing some to the challenges faced by tertiary institutions on decolonization of the social sciences modules at the Nelson Mandela University. The geographical area of the university is Eastern Cape, Port Elizabeth, Summerstrand, and the study was done on the south campus of the Nelson Mandela University. This study attempts to shed some light on the decolonization and Africanization of the modules through the lenses of post-graduate students. Literature is utilized to get a broader understanding of the concept of decolonization. The study also suggests how the university curriculum can be Africanized so that it can be more inclusive to African students and more relevant to African students. Interviews with post-graduate students are used as guideline to get a better understanding of how the modules affect them and the solutions to their concerns emerging from colonized modules. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Manduluka, Lubabalo
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54481 , vital:46603
- Description: This research project is motivated by the students 2015-2016 higher education student protest that called for the decolonization of higher education institutions. It is widely accepted that for university module to serve students properly, it should be relevant to students it should be and must be localised. The research study considered the perceptions of post-graduate students on the decolonization of social sciences modules from the Nelson Mandela University. The objectives of the study are as follows: to investigate the perception of post-graduate students based within the School of Social Sciences on the decolonization of the social sciences modules at the Nelson Mandela University at South campus. To come up with recommendations with the view of addressing some to the challenges faced by tertiary institutions on decolonization of the social sciences modules at the Nelson Mandela University. The geographical area of the university is Eastern Cape, Port Elizabeth, Summerstrand, and the study was done on the south campus of the Nelson Mandela University. This study attempts to shed some light on the decolonization and Africanization of the modules through the lenses of post-graduate students. Literature is utilized to get a broader understanding of the concept of decolonization. The study also suggests how the university curriculum can be Africanized so that it can be more inclusive to African students and more relevant to African students. Interviews with post-graduate students are used as guideline to get a better understanding of how the modules affect them and the solutions to their concerns emerging from colonized modules. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Plastic particle characterization and concentrations found in the river and marine water environment of Algoa Bay, South Africa
- Authors: Moss, Kerry-Leigh
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53874 , vital:46025
- Description: Only 12% of the world's published plastic research includes references to Africa despite it being a significant contributor to the global plastic waste and mismanagement problem (~88.5% of Africa's plastic waste is mismanaged). Ocean plastics are transported from land by rivers to the sea. However, source contextualization is complex. Many African rivers predominantly run alongside human settlements that host informal waste dumpsites. In this study a simple cost effective, easily deployed, consistent and replicable survey methodology was employed. The study quantified macro plastic in three rivers discharging into Algoa Bay, South Africa. The results indicated that industrial Swartkops and metropolitan Baakens Rivers both illustrate moderate plastic pollution (>3000 plastic particles/day), with the relatively natural Sundays River to showing minimal evidence of river macroplastic (<100 plastic particles/day). The types of plastic were noted using the RIMMEL app (premier African implementation), enabling proportional comparison of different plastic litter types to be completed. , Thesis (MSc) -- Faculty of Science, Oceanography Department,2021
- Full Text:
- Date Issued: 2021-12
- Authors: Moss, Kerry-Leigh
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53874 , vital:46025
- Description: Only 12% of the world's published plastic research includes references to Africa despite it being a significant contributor to the global plastic waste and mismanagement problem (~88.5% of Africa's plastic waste is mismanaged). Ocean plastics are transported from land by rivers to the sea. However, source contextualization is complex. Many African rivers predominantly run alongside human settlements that host informal waste dumpsites. In this study a simple cost effective, easily deployed, consistent and replicable survey methodology was employed. The study quantified macro plastic in three rivers discharging into Algoa Bay, South Africa. The results indicated that industrial Swartkops and metropolitan Baakens Rivers both illustrate moderate plastic pollution (>3000 plastic particles/day), with the relatively natural Sundays River to showing minimal evidence of river macroplastic (<100 plastic particles/day). The types of plastic were noted using the RIMMEL app (premier African implementation), enabling proportional comparison of different plastic litter types to be completed. , Thesis (MSc) -- Faculty of Science, Oceanography Department,2021
- Full Text:
- Date Issued: 2021-12
Post-apartheid geographies of studentification at Nelson Mandela University, Port Elizabeth, South Africa
- Authors: Mzileni, Pedro Mihlali
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53758 , vital:45759
- Description: This study takes the concept of studentification from its British conception to the post-apartheid African city, Port Elizabeth (Gqeberha), where the Nelson Mandela University is situated. Studentification refers to the mass arrival of students in university cities and towns and the economic, infrastructural, geographic and sociopolitical changes that the settlements of these students make overtime to such cities and towns. For the case of Nelson Mandela University in Port Elizabeth, this study identified four major areas that are engulfed by studentification and sought to understand how this phenomenon takes shape in them. The study extends the existing terms and languages used to comprehend studentification by introducing a viewpoint of how it emerges in an African post-apartheid city. This is a city that has deindustrialised and has also experienced a capital flight out of its city centre since the 1970s. These declining economic indicators over decades have left the city to decay and experience high rates of unemployment, poverty and housing displacements. But, the post-1994 massification of the South African higher education system introduced new micro-economies for the city mainly through the emergence of student accommodation as a thriving business opportunity in the city in light of increased university enrolments. However, the economic injection brought by student accommodation in this city that has been deindustrialising remains minimal in having the necessary power to turnaround the city’s fortunes and transform the urban space towards a developmental path. This socioeconomic problem is also compounded by the presence of a weak arm of the state (particularly local government) that is unable to play an active role in driving capital flows to deliver tangible urban development. As a result, the university emerges as one of the active public actors in the renewal efforts of the city even though this is not its primary mandate. Thus, the process of studentification in this case takes place in a context defined by a declining higher education political economy and a weak city planning regime. As a result, these factors leave studentification to be vulnerable to being impacted by old colonial-apartheid structures of the city and the economic shortfalls of post-apartheid urban South Africa that have produced a precarious urban space where the private property market and the illicit economy have a stronger hand in determining the power relations that emerge in the city space. Studentification in this African city is expressed in four major geographies: (1) the Summerstrand suburb that is nearest to the University’s main urban campuses, (2) the Central CBD that has experienced capital flight and currently has tall buildings that are former offices of apartheid commerce which have been converted to student accommodation, (3) the deindustrialised and abandoned manufacturing sites at the North End margins of the city which have also been converted to student accommodation, and (4) the Zwide township, an underprivileged black community that is close to the former black Missionvale campus of the University – this is the furthest student accommodation area in the city. The study examines these student communities that emerge out of these four identified areas of the urban space and it also underscores the genre of the political, social, and economic relations of each of these four geographies and their interconnectedness. The study found that the South African post-apartheid city is characterised by an urban model and a university campus design that is a structural outcome of colonisation, apartheid spatial planning, and racial capitalism that still has continuing legacies today. As a result, these four geographies of studentification in the city are historical, racial and economic outcomes of urban power relations that originate from colonialism. Key defining features of studentification in each of these four areas were identified and analysed to illustrate that the South African account of studentification resembles the city’s apartheid legacy and these untransformed urban structures get further compounded by the country’s underfunded higher education massification strategy, its declining economic indicators and a weak state that has ‘soft’ planning and governance systems that are unable to decisively impact the trajectory of socioeconomic development in this university city. These intersecting forces translate into precarious day-to-day student life experiences and structural complications for the governance of the University and the city. These socioeconomic misfortunes also handicap the potential of the city to renew through a studentification economy. Henri Lefebvre’s Production of Space Theory was utilised to frame the study. Methodologically, the study utilised qualitative narrative interviews and document interpretation. This is the first doctoral thesis written about the concept of studentification in South Africa. , Thesis (PhD) -- Faculty of Humanities, The Department of Sociology and Anthropology, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mzileni, Pedro Mihlali
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53758 , vital:45759
- Description: This study takes the concept of studentification from its British conception to the post-apartheid African city, Port Elizabeth (Gqeberha), where the Nelson Mandela University is situated. Studentification refers to the mass arrival of students in university cities and towns and the economic, infrastructural, geographic and sociopolitical changes that the settlements of these students make overtime to such cities and towns. For the case of Nelson Mandela University in Port Elizabeth, this study identified four major areas that are engulfed by studentification and sought to understand how this phenomenon takes shape in them. The study extends the existing terms and languages used to comprehend studentification by introducing a viewpoint of how it emerges in an African post-apartheid city. This is a city that has deindustrialised and has also experienced a capital flight out of its city centre since the 1970s. These declining economic indicators over decades have left the city to decay and experience high rates of unemployment, poverty and housing displacements. But, the post-1994 massification of the South African higher education system introduced new micro-economies for the city mainly through the emergence of student accommodation as a thriving business opportunity in the city in light of increased university enrolments. However, the economic injection brought by student accommodation in this city that has been deindustrialising remains minimal in having the necessary power to turnaround the city’s fortunes and transform the urban space towards a developmental path. This socioeconomic problem is also compounded by the presence of a weak arm of the state (particularly local government) that is unable to play an active role in driving capital flows to deliver tangible urban development. As a result, the university emerges as one of the active public actors in the renewal efforts of the city even though this is not its primary mandate. Thus, the process of studentification in this case takes place in a context defined by a declining higher education political economy and a weak city planning regime. As a result, these factors leave studentification to be vulnerable to being impacted by old colonial-apartheid structures of the city and the economic shortfalls of post-apartheid urban South Africa that have produced a precarious urban space where the private property market and the illicit economy have a stronger hand in determining the power relations that emerge in the city space. Studentification in this African city is expressed in four major geographies: (1) the Summerstrand suburb that is nearest to the University’s main urban campuses, (2) the Central CBD that has experienced capital flight and currently has tall buildings that are former offices of apartheid commerce which have been converted to student accommodation, (3) the deindustrialised and abandoned manufacturing sites at the North End margins of the city which have also been converted to student accommodation, and (4) the Zwide township, an underprivileged black community that is close to the former black Missionvale campus of the University – this is the furthest student accommodation area in the city. The study examines these student communities that emerge out of these four identified areas of the urban space and it also underscores the genre of the political, social, and economic relations of each of these four geographies and their interconnectedness. The study found that the South African post-apartheid city is characterised by an urban model and a university campus design that is a structural outcome of colonisation, apartheid spatial planning, and racial capitalism that still has continuing legacies today. As a result, these four geographies of studentification in the city are historical, racial and economic outcomes of urban power relations that originate from colonialism. Key defining features of studentification in each of these four areas were identified and analysed to illustrate that the South African account of studentification resembles the city’s apartheid legacy and these untransformed urban structures get further compounded by the country’s underfunded higher education massification strategy, its declining economic indicators and a weak state that has ‘soft’ planning and governance systems that are unable to decisively impact the trajectory of socioeconomic development in this university city. These intersecting forces translate into precarious day-to-day student life experiences and structural complications for the governance of the University and the city. These socioeconomic misfortunes also handicap the potential of the city to renew through a studentification economy. Henri Lefebvre’s Production of Space Theory was utilised to frame the study. Methodologically, the study utilised qualitative narrative interviews and document interpretation. This is the first doctoral thesis written about the concept of studentification in South Africa. , Thesis (PhD) -- Faculty of Humanities, The Department of Sociology and Anthropology, 2021
- Full Text:
- Date Issued: 2021-12
Preventive diplomacy and conflict prevention in Africa: an examination of South Africa’s role in conflict resolution in the Democratic Republic of The Congo
- Authors: Mandela, Siyabulela
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54471 , vital:46584
- Description: The Agenda 2063 tabled a blueprint of seven aspirations, for the Africa we want and one which was critical to this study being a peaceful and secure Africa. As postulated in this aspiration, by Agenda 2063, “Africa shall be free from armed conflict, terrorism, extremism, intolerance, and gender-based violence, which are major threats to human security, peace and development”. The Assembly of the AU committed in the agenda to fast-track actions to silence the guns by 2020, through enhanced dialogue-centred conflict prevention and resolution. The deadline for silencing guns and ending all wars in Africa was 2020, which has passed and Africa remains characterised by violent conflict and underdevelopment. Violent conflict of different magnitudes continues unabated across different states in Africa and remain insolent to any means towards resolution. The African continent is also a host to the most fragile states in the world, and the governments of these countries are unable to cultivate or facilitate the necessary conditions needed for sustainable peace and development. The conditions of poverty, frustration of basic human needs, maladministration, corruption, mismanagement of diversity and ethnic divisions so prevalent in Africa increase the likelihood of violent conflict. Conflict provention, preventive diplomacy, problem-solving workshops, peacebuilding and peacekeeping are all variants of peace operations deemed crucial in this study for Africa’s stability, peace and development. The advancement of preventive diplomacy and conflict provention as a hybrid framework for the prevention and resolution of violent conflict and promotion of sustainable peace and development in Africa was at the centre of this study. The study adopted John Burton’s basic human needs theory as a theoretical framework to further highlight an urgency by African states to prioritise policies and conflict resolution efforts directed at addressing the underlying issues giving rise to violent conflicts, if sustainable peace and development was to be realised in the continent. , Thesis (PhD) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mandela, Siyabulela
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54471 , vital:46584
- Description: The Agenda 2063 tabled a blueprint of seven aspirations, for the Africa we want and one which was critical to this study being a peaceful and secure Africa. As postulated in this aspiration, by Agenda 2063, “Africa shall be free from armed conflict, terrorism, extremism, intolerance, and gender-based violence, which are major threats to human security, peace and development”. The Assembly of the AU committed in the agenda to fast-track actions to silence the guns by 2020, through enhanced dialogue-centred conflict prevention and resolution. The deadline for silencing guns and ending all wars in Africa was 2020, which has passed and Africa remains characterised by violent conflict and underdevelopment. Violent conflict of different magnitudes continues unabated across different states in Africa and remain insolent to any means towards resolution. The African continent is also a host to the most fragile states in the world, and the governments of these countries are unable to cultivate or facilitate the necessary conditions needed for sustainable peace and development. The conditions of poverty, frustration of basic human needs, maladministration, corruption, mismanagement of diversity and ethnic divisions so prevalent in Africa increase the likelihood of violent conflict. Conflict provention, preventive diplomacy, problem-solving workshops, peacebuilding and peacekeeping are all variants of peace operations deemed crucial in this study for Africa’s stability, peace and development. The advancement of preventive diplomacy and conflict provention as a hybrid framework for the prevention and resolution of violent conflict and promotion of sustainable peace and development in Africa was at the centre of this study. The study adopted John Burton’s basic human needs theory as a theoretical framework to further highlight an urgency by African states to prioritise policies and conflict resolution efforts directed at addressing the underlying issues giving rise to violent conflicts, if sustainable peace and development was to be realised in the continent. , Thesis (PhD) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Protean career management of independent music creatives in Gqeberha : narratives of practice
- Authors: Henneberry, Robyn
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54439 , vital:46541
- Description: This study is concerned with the promotion of local music creatives. The literature explores ways to help the independent music creatives successfully navigate in the music industry by adopting a protean career profile. The research question that was explored in the study was whether or not the independent popular female creatives in the city of Gqeberha’s music industry adopted protean career profiles for successful career navigation. These pop music creatives’ profiles were compared to those of classical creatives for further insight. Relevant literature was analysed to collect data about what international authors have discovered about creatives’ successful navigation of their careers. The information that was gleaned from the analysis indicated that numerous individuals have adopted the profile of the protean career to successfully navigate their environment. The rationale for adopting the protean career profile was that it is directly related to one’s employability. Although the working world (including the music industry) is rapidly changing, this notion of employability will enable an individual to remain updated about the latest trends in their work environment and thus successfully navigate that environment. This concept was applied to research among music creatives in the South African (SA) context. Although there was limited research on the protean career profile, the published research findings that were available indicated that employability and information were in alliance with the international research on the protean career (which constitutes one’s employability). Employing qualitative data collection procedures, the researcher interviewed 14 independent female music creatives with different backgrounds, roles and experiences. Interviews were semi-structured one-on-one as well as focus groups. This narrative strategy of inquiry helped determine whether or not these individuals had adopted the protean career for successful navigation of their working environment. After data collection the researcher engaged in a cyclical coding process for deep analysation of the data utilising atlas.ti. The data was reduced from codes to categories, and eventually towards linking categories. The findings from the study revealed that the participants’ environment (surroundings) did not sufficiently support them, the creatives do not have sufficient guidance in their music paths and not all of them had adopted the protean profile. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Henneberry, Robyn
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54439 , vital:46541
- Description: This study is concerned with the promotion of local music creatives. The literature explores ways to help the independent music creatives successfully navigate in the music industry by adopting a protean career profile. The research question that was explored in the study was whether or not the independent popular female creatives in the city of Gqeberha’s music industry adopted protean career profiles for successful career navigation. These pop music creatives’ profiles were compared to those of classical creatives for further insight. Relevant literature was analysed to collect data about what international authors have discovered about creatives’ successful navigation of their careers. The information that was gleaned from the analysis indicated that numerous individuals have adopted the profile of the protean career to successfully navigate their environment. The rationale for adopting the protean career profile was that it is directly related to one’s employability. Although the working world (including the music industry) is rapidly changing, this notion of employability will enable an individual to remain updated about the latest trends in their work environment and thus successfully navigate that environment. This concept was applied to research among music creatives in the South African (SA) context. Although there was limited research on the protean career profile, the published research findings that were available indicated that employability and information were in alliance with the international research on the protean career (which constitutes one’s employability). Employing qualitative data collection procedures, the researcher interviewed 14 independent female music creatives with different backgrounds, roles and experiences. Interviews were semi-structured one-on-one as well as focus groups. This narrative strategy of inquiry helped determine whether or not these individuals had adopted the protean career for successful navigation of their working environment. After data collection the researcher engaged in a cyclical coding process for deep analysation of the data utilising atlas.ti. The data was reduced from codes to categories, and eventually towards linking categories. The findings from the study revealed that the participants’ environment (surroundings) did not sufficiently support them, the creatives do not have sufficient guidance in their music paths and not all of them had adopted the protean profile. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
Quantifying variability of emissions of greenhouse gas (CO2& CH4) across selected soils and agricultural practices
- Authors: Sebake, Tebogo Matsimela
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54107 , vital:46302
- Description: Increasing concentrations of greenhouse gases (GHG’s)in the atmosphere are warming the planet, and agriculture is responsible for about 30% of these emissions. Soils act as a host for greenhouse gases, since both their storage and emission capacities are large, accounting for two-times the amount of carbon in the atmosphere and in plant and animal life. It sequesters large amounts of carbon, and because agricultural practices depend on soil for production, the practices influence the soil’s ability to store the carbon effectively. Production soils emit greenhouse gas, predominantly carbon dioxide and methane, which are assessed for emissions in this study. Climate change creates unpredictability in precipitation and temperature; farmers need to be flexible and adapt production methods to such environmental changes in order to continue producing sustainably. Global food production needs to grow drastically to meet the projected demands for rising population and diet shifts; studies have shown that feeding a more populated and a more affluent, equal, world will require roughly a doubling of agricultural production by 2050, which means more GHG emissions from the soil. To enable better control on these emissions, their links to agricultural practices need to be better quantified. The study was done in two areas: (1) long-term comparative farming systems research trial with controlled vegetable plots, in the agricultural school of Nelson Mandela University, in George, Western Cape province and (2) long-term wheat research trial of the Free State University, in Bethlehem, Free State province. The objective in study area one is to assess and compare GHG emissions from conventional and organic systems. Temperature and soil moisture were measured during gas samples to establish the influence they have on gas emissions. The objective in study area two is to assess and compare GHG emissions from no-till, plough, and stubble mulch. Stubble mulch refers to crop residue left in place on the land as a surface cover during fallow periods. Two polypropylene canisters are placed in a sampled plot to trap gas emitted from the soil. Analyses of the trapped gases in the headspace gives concentrations of CO2and CH4that was emitted during the duration the canister was closed. The gas is analysed by a G2201-i Picarro gas analyser, presently the only such instrument in South Africa. The analyser’s near-infrared Cavity Ring Down Spectroscopy technology is capable of simultaneous measurements of CO2and CH4down to parts per million. In study area one, conventional plots (R2T6 & R1T6) emitted 65.089ppm CO2and 61.159ppm CO2, and 0.0010ppm CH4and 0.0004ppm CH4, respectively. Organic plots (R1T3 & R2T3) emitted 53.264ppm CO2and 47.885ppm CO2, and 0.0023ppm CH4and 0.0019ppm CH4respectively. Thus, conventional plots emitted 19.98% & 30.98% more CO2than organic plots; but organic plots emitted 81.97% & 155.5% more CH4thanconventional plots. In study area two, ploughed soils emitted 38.727ppm CO2and 0.015ppm CH4, no-tilled soils emitted 31.798ppm CO2 and 0.011ppm CH4andstubble mulched soils emitted 28.373ppm CO2 and 0.009ppm CH4. Thus, ploughed soils emitted 19.65%more CO2than no-tilled soils, no-tilled soils emitted 11.38% more CO2 than stubble mulched soils and ploughed soils emitted 30.36% more CO2 than stubble mulched soils. Ploughed soils emitted 30.77% more CH4 than no-tilled soils, no-tilled soils emitted 20% more CH4 than stubble mulched soils and ploughed soils emitted 50% more CH4than stubble mulched soils. Moist soils result in decreased CO2emissions in conventional plots and increased CH4emissions in organic plots. Increasing temperature patterns are followed by a trend of increasing gas emissions. Reducing GHG emissions from agriculture and developing sustainable tillage practices can help mitigate climate change and increases the chances of stabilizing GHG concentrations and temperature control within a required range. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Sebake, Tebogo Matsimela
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54107 , vital:46302
- Description: Increasing concentrations of greenhouse gases (GHG’s)in the atmosphere are warming the planet, and agriculture is responsible for about 30% of these emissions. Soils act as a host for greenhouse gases, since both their storage and emission capacities are large, accounting for two-times the amount of carbon in the atmosphere and in plant and animal life. It sequesters large amounts of carbon, and because agricultural practices depend on soil for production, the practices influence the soil’s ability to store the carbon effectively. Production soils emit greenhouse gas, predominantly carbon dioxide and methane, which are assessed for emissions in this study. Climate change creates unpredictability in precipitation and temperature; farmers need to be flexible and adapt production methods to such environmental changes in order to continue producing sustainably. Global food production needs to grow drastically to meet the projected demands for rising population and diet shifts; studies have shown that feeding a more populated and a more affluent, equal, world will require roughly a doubling of agricultural production by 2050, which means more GHG emissions from the soil. To enable better control on these emissions, their links to agricultural practices need to be better quantified. The study was done in two areas: (1) long-term comparative farming systems research trial with controlled vegetable plots, in the agricultural school of Nelson Mandela University, in George, Western Cape province and (2) long-term wheat research trial of the Free State University, in Bethlehem, Free State province. The objective in study area one is to assess and compare GHG emissions from conventional and organic systems. Temperature and soil moisture were measured during gas samples to establish the influence they have on gas emissions. The objective in study area two is to assess and compare GHG emissions from no-till, plough, and stubble mulch. Stubble mulch refers to crop residue left in place on the land as a surface cover during fallow periods. Two polypropylene canisters are placed in a sampled plot to trap gas emitted from the soil. Analyses of the trapped gases in the headspace gives concentrations of CO2and CH4that was emitted during the duration the canister was closed. The gas is analysed by a G2201-i Picarro gas analyser, presently the only such instrument in South Africa. The analyser’s near-infrared Cavity Ring Down Spectroscopy technology is capable of simultaneous measurements of CO2and CH4down to parts per million. In study area one, conventional plots (R2T6 & R1T6) emitted 65.089ppm CO2and 61.159ppm CO2, and 0.0010ppm CH4and 0.0004ppm CH4, respectively. Organic plots (R1T3 & R2T3) emitted 53.264ppm CO2and 47.885ppm CO2, and 0.0023ppm CH4and 0.0019ppm CH4respectively. Thus, conventional plots emitted 19.98% & 30.98% more CO2than organic plots; but organic plots emitted 81.97% & 155.5% more CH4thanconventional plots. In study area two, ploughed soils emitted 38.727ppm CO2and 0.015ppm CH4, no-tilled soils emitted 31.798ppm CO2 and 0.011ppm CH4andstubble mulched soils emitted 28.373ppm CO2 and 0.009ppm CH4. Thus, ploughed soils emitted 19.65%more CO2than no-tilled soils, no-tilled soils emitted 11.38% more CO2 than stubble mulched soils and ploughed soils emitted 30.36% more CO2 than stubble mulched soils. Ploughed soils emitted 30.77% more CH4 than no-tilled soils, no-tilled soils emitted 20% more CH4 than stubble mulched soils and ploughed soils emitted 50% more CH4than stubble mulched soils. Moist soils result in decreased CO2emissions in conventional plots and increased CH4emissions in organic plots. Increasing temperature patterns are followed by a trend of increasing gas emissions. Reducing GHG emissions from agriculture and developing sustainable tillage practices can help mitigate climate change and increases the chances of stabilizing GHG concentrations and temperature control within a required range. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Re-imagining Afrikaner masculinity through conceptual fashion design
- Authors: Smit, Dalton
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54563 , vital:46708
- Description: Traditional Afrikaner culture has often been associated with conservative beliefs, giving patriarchal figures such as the husband and father superior status. Although South Africa has undergone social progression, large numbers in Afrikaner communities still live according to old, patriarchal norms. My perceptions of Afrikaner masculinity, informed by my cultural background, enforce patriarchy's functioning in some Afrikaner homes, allowing the development of rigid expectations of a male's self-expression. These mind-sets of what masculinity is do not align with my values, beliefs, and the visual presentation of my identity. With the application of autoethnographic inquiry in this practice-based study, I was able to analyse and interpret the nuanced discrimination against the performance of my male identity in an Afrikaner cultural context. I implemented autoethnographic and practice-based methods to respond to and challenge outdated and conservative views regarding the prevalence of Afrikaner masculine ideals and their negative implications. The contribution of the research practice is FYN BOI, a fictive persona constructed and performed by me. He represents a liberated facet of my identity whose reaction is rejection against the Afrikaner cultural opinions of me, and in turn, is fuelled by the criticism to provoke further and challenge these views. The conceptual garments created are considered his wardrobe, which he uses in his self-expression online. With this unconventional approach to a fashion study, disseminating the research practice online instead of a physical exhibition allows for the study to be accessed to audiences beyond academia's domain. This undertaking intends to contribute to the existing discourse of masculinity and prejudice against individuals' self-expression of their identity. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Smit, Dalton
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54563 , vital:46708
- Description: Traditional Afrikaner culture has often been associated with conservative beliefs, giving patriarchal figures such as the husband and father superior status. Although South Africa has undergone social progression, large numbers in Afrikaner communities still live according to old, patriarchal norms. My perceptions of Afrikaner masculinity, informed by my cultural background, enforce patriarchy's functioning in some Afrikaner homes, allowing the development of rigid expectations of a male's self-expression. These mind-sets of what masculinity is do not align with my values, beliefs, and the visual presentation of my identity. With the application of autoethnographic inquiry in this practice-based study, I was able to analyse and interpret the nuanced discrimination against the performance of my male identity in an Afrikaner cultural context. I implemented autoethnographic and practice-based methods to respond to and challenge outdated and conservative views regarding the prevalence of Afrikaner masculine ideals and their negative implications. The contribution of the research practice is FYN BOI, a fictive persona constructed and performed by me. He represents a liberated facet of my identity whose reaction is rejection against the Afrikaner cultural opinions of me, and in turn, is fuelled by the criticism to provoke further and challenge these views. The conceptual garments created are considered his wardrobe, which he uses in his self-expression online. With this unconventional approach to a fashion study, disseminating the research practice online instead of a physical exhibition allows for the study to be accessed to audiences beyond academia's domain. This undertaking intends to contribute to the existing discourse of masculinity and prejudice against individuals' self-expression of their identity. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
Studies on seed germination and response to fertilization of Amaranthus accessions collected in the Eastern Cape Province, South Africa
- Ramangoele, Mpaballeng Alinah
- Authors: Ramangoele, Mpaballeng Alinah
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54112 , vital:46307
- Description: Studies were conducted at Döhne Agricultural Development Institute (D.A.D.I.), geographically located between latitude 32°31'34.077"S and longitude 27°27'37.473"E in Stutterheim, Eastern Cape Province from summer 2018 until autumn 2019.The objectives were to determine seed germination and seedling vigour of four local Amaranthus accessions and to evaluate the effect of organic and inorganic fertilization on the growth, yield and nutrient composition. In the germination studies, herein referred to as Experiment 1,laboratory assessments were laid out in a Complete Randomized Design (CRD) replicated four times to test seed germination, seedling emergence and seedling vigour of four Amaranthus accessions namely: A. Hypochondriacus, A. Retroflexus 1, A. Hybridus and A. Retroflexus 2. Data collection included germination percentage, radicle length, co-efficient of velocity of germination and seedling vigour. A.Retroflexus2 gave the highest germination percentage in summer (85%) and autumn (87.75%).Seed weight resulted in the highest germination percentage and was observed to have shown a high positive correlation of {R2=0.91} in summer and{R2=0.92} in autumn respectively. The highest seedling vigour (p<0.001) in summer was attained from A. Hypochondriacus and A. Retroflexus2.In the greenhouse in summer, the highest emergence percentage was observed from A. Hypochondriacus(93.00%), whilst in autumn it was A.Retroflexus2 (88.38%).A. Retroflexus1 was the least performer in both seasons. In summer, A. Hypochondriacus and A. Retroflexus2 resulted in very high seedling vigour. In autumn A. Hypochondriacus, A. Retroflexus2 and A. Hybridus resulted in high seedling vigour and A. Retroflexus1 in moderate seedling vigour. The relationship observed between seed weight and seedling vigour showed a negative (inverse)correlation in summer {R2=0.58} and autumn {R2=0.62}.In Experiment 2, seedlings of A. Hypochondriacus and A. Retroflexus 2were transplanted in 5litrebasal perforated plastic pots which were filled with soil. The experimental layout was a CRD replicated four times. The treatments were: control (no amendment), goat manure, cattle manure and NPK fertilizer. Growth performance data were collected for plant height, the number of leaves and stem girth. In summer, when goat manure was applied both accessions resulted in the tallest plants (78.80cm) yet A. Retroflexus 2 and vA. Hypochondriacus gave the greatest stem girthand highest number of leaves respectively. In autumn, the tallest plants and highest number of leaves were observed from A. Retroflexus 2fertilized with NPK and the greatest stem girth was observed from A. Hypochondriacus fertilized with goat manure. The interaction of fertilization and accessions resulted in A. Retroflexus 2 fertilized with goat manure generating the greatest fresh shoot biomass (137.27g plant-1) and the least from the control. Both accessions fertilized with goat manure attained the greatest dry leaf biomass. Insummer, A.Retroflexus2 outperformed A. Hypochondriacus in calcium content despite the treatments. Unfertilized A. Retroflexus2 produced leaves with high potassium. Both unfertilized accessions showed the highest magnesium content. All A. Retroflexus2 treatments outperformed A. Hypochondriacus treatments on iron content except the control. The summer season was the best in terms of growth and yield of the tested accessions. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Ramangoele, Mpaballeng Alinah
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54112 , vital:46307
- Description: Studies were conducted at Döhne Agricultural Development Institute (D.A.D.I.), geographically located between latitude 32°31'34.077"S and longitude 27°27'37.473"E in Stutterheim, Eastern Cape Province from summer 2018 until autumn 2019.The objectives were to determine seed germination and seedling vigour of four local Amaranthus accessions and to evaluate the effect of organic and inorganic fertilization on the growth, yield and nutrient composition. In the germination studies, herein referred to as Experiment 1,laboratory assessments were laid out in a Complete Randomized Design (CRD) replicated four times to test seed germination, seedling emergence and seedling vigour of four Amaranthus accessions namely: A. Hypochondriacus, A. Retroflexus 1, A. Hybridus and A. Retroflexus 2. Data collection included germination percentage, radicle length, co-efficient of velocity of germination and seedling vigour. A.Retroflexus2 gave the highest germination percentage in summer (85%) and autumn (87.75%).Seed weight resulted in the highest germination percentage and was observed to have shown a high positive correlation of {R2=0.91} in summer and{R2=0.92} in autumn respectively. The highest seedling vigour (p<0.001) in summer was attained from A. Hypochondriacus and A. Retroflexus2.In the greenhouse in summer, the highest emergence percentage was observed from A. Hypochondriacus(93.00%), whilst in autumn it was A.Retroflexus2 (88.38%).A. Retroflexus1 was the least performer in both seasons. In summer, A. Hypochondriacus and A. Retroflexus2 resulted in very high seedling vigour. In autumn A. Hypochondriacus, A. Retroflexus2 and A. Hybridus resulted in high seedling vigour and A. Retroflexus1 in moderate seedling vigour. The relationship observed between seed weight and seedling vigour showed a negative (inverse)correlation in summer {R2=0.58} and autumn {R2=0.62}.In Experiment 2, seedlings of A. Hypochondriacus and A. Retroflexus 2were transplanted in 5litrebasal perforated plastic pots which were filled with soil. The experimental layout was a CRD replicated four times. The treatments were: control (no amendment), goat manure, cattle manure and NPK fertilizer. Growth performance data were collected for plant height, the number of leaves and stem girth. In summer, when goat manure was applied both accessions resulted in the tallest plants (78.80cm) yet A. Retroflexus 2 and vA. Hypochondriacus gave the greatest stem girthand highest number of leaves respectively. In autumn, the tallest plants and highest number of leaves were observed from A. Retroflexus 2fertilized with NPK and the greatest stem girth was observed from A. Hypochondriacus fertilized with goat manure. The interaction of fertilization and accessions resulted in A. Retroflexus 2 fertilized with goat manure generating the greatest fresh shoot biomass (137.27g plant-1) and the least from the control. Both accessions fertilized with goat manure attained the greatest dry leaf biomass. Insummer, A.Retroflexus2 outperformed A. Hypochondriacus in calcium content despite the treatments. Unfertilized A. Retroflexus2 produced leaves with high potassium. Both unfertilized accessions showed the highest magnesium content. All A. Retroflexus2 treatments outperformed A. Hypochondriacus treatments on iron content except the control. The summer season was the best in terms of growth and yield of the tested accessions. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
- Full Text:
- Date Issued: 2021-12
The aesthetics of hegemony: a speculative design proposal exploring the convergence of surveillance capitalism and brain-computer interface technologies in the future
- Authors: Davies, James Tibbott
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54417 , vital:46517
- Description: This study examines the power dynamics of surveillance capitalism, and its role in shaping cultural hegemony. The research was expressed using graphic design to illustrate a (potential) future where Brain-Computer Interfaces (BCIs) and surveillance capitalism converge. The critique focused on Google and Facebook’s hegemony in the data-surveillance marketplace and what role this has in shaping global discourse. Both companies are funding the development of BCIs, with the aim of using brain signals as a means of interacting with the digital world, which would give the two biggest advertising companies in the world access to new sources of data. A speculative design framework was utilized to visually question the societal implications of this emerging technology and the funding behind its development. A theoretical investigation of the concepts underpinning critical theory and critical design was conducted to help clarify and critically inform this methodological approach, promoting the use of practice-based design as a critically reflective investigative tool. The resulting artefacts designed using this process were showcased in the form of a website and video that act as a visual embodiment the research, demonstrating the efficacy of this approach and the value of using communication design as a mechanism to question the status quo. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Davies, James Tibbott
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54417 , vital:46517
- Description: This study examines the power dynamics of surveillance capitalism, and its role in shaping cultural hegemony. The research was expressed using graphic design to illustrate a (potential) future where Brain-Computer Interfaces (BCIs) and surveillance capitalism converge. The critique focused on Google and Facebook’s hegemony in the data-surveillance marketplace and what role this has in shaping global discourse. Both companies are funding the development of BCIs, with the aim of using brain signals as a means of interacting with the digital world, which would give the two biggest advertising companies in the world access to new sources of data. A speculative design framework was utilized to visually question the societal implications of this emerging technology and the funding behind its development. A theoretical investigation of the concepts underpinning critical theory and critical design was conducted to help clarify and critically inform this methodological approach, promoting the use of practice-based design as a critically reflective investigative tool. The resulting artefacts designed using this process were showcased in the form of a website and video that act as a visual embodiment the research, demonstrating the efficacy of this approach and the value of using communication design as a mechanism to question the status quo. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
The benefits of community music on individuals in Port Elizabeth
- Authors: Rossouw, Carolyn
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54552 , vital:46703
- Description: Countless research studies have outlined the benefits of Community Music engagement. Community Music is a global phenomenon that offers benefits to and across both international and national music projects. There are many forms of Community Music, including choral groups, instrumentalists, bands, and other ensembles. A variety of reasons or perspectives exist as to why participants engage in Community Music activities, such as the benefits that they gain when engaging in a project and/or the experiences of learning music in a social context. Characteristics of Community Music entail voluntary participation for individuals from all walks of life (e.g., those of high or low socio-economic standing, different races, and/or different levels of mental and/or emotional well-being). This study investigated three Community Music projects that take place at three different churches in Port Elizabeth, South Africa. The Community Music projects described in this study were different to those that are usually described in academic studies in so far as they are not aimed at social reform, social intervention, creative possibilities, or self-expression. Instead, this study focussed on investigating Community Music in Port Elizabeth based purely on creative possibilities and self-expression in order to better understand the benefits it can have on the individuals and community taking part therein. The Community Music projects described in this study involve both adult and youth participants and all fall under ‘church music’. Specifically, the projects consist of an adult church choir, a youth worship band, and an instrumental ensemble. In this qualitative study, a multiple case study approach was adopted, and data were gathered through observations, unstructured interviews, and both audio-visual and written materials. Themes emerged from the study that have been categorised as follows: social benefits, well-being benefits, spiritual benefits, musical skills development benefits, and leadership benefits. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Rossouw, Carolyn
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54552 , vital:46703
- Description: Countless research studies have outlined the benefits of Community Music engagement. Community Music is a global phenomenon that offers benefits to and across both international and national music projects. There are many forms of Community Music, including choral groups, instrumentalists, bands, and other ensembles. A variety of reasons or perspectives exist as to why participants engage in Community Music activities, such as the benefits that they gain when engaging in a project and/or the experiences of learning music in a social context. Characteristics of Community Music entail voluntary participation for individuals from all walks of life (e.g., those of high or low socio-economic standing, different races, and/or different levels of mental and/or emotional well-being). This study investigated three Community Music projects that take place at three different churches in Port Elizabeth, South Africa. The Community Music projects described in this study were different to those that are usually described in academic studies in so far as they are not aimed at social reform, social intervention, creative possibilities, or self-expression. Instead, this study focussed on investigating Community Music in Port Elizabeth based purely on creative possibilities and self-expression in order to better understand the benefits it can have on the individuals and community taking part therein. The Community Music projects described in this study involve both adult and youth participants and all fall under ‘church music’. Specifically, the projects consist of an adult church choir, a youth worship band, and an instrumental ensemble. In this qualitative study, a multiple case study approach was adopted, and data were gathered through observations, unstructured interviews, and both audio-visual and written materials. Themes emerged from the study that have been categorised as follows: social benefits, well-being benefits, spiritual benefits, musical skills development benefits, and leadership benefits. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
The impact of institutional cultures on student’s wellbeing among postgraduate students: the case of Nelson Mandela University in South Africa
- Authors: Lebelo, Mpho Tiny
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55402 , vital:51990
- Description: Increasingly, students across the world in various tertiary institutions are faced with many challenges ranging from financial difficulties, accommodation, academic exclusion and many other challenges. Subsequently, the students’ academic performance suffers due to these challenges. This thesis therefore aims to focus on the perspectives of the post-graduate students at the Nelson Mandela University regarding the notion of wellbeing. This thesis attempts to uses a sociological indigenous perspective of wellbeing of “impilo” in describing well-being. Therefore, the thesis uses wellness as a conceptual framework to understand the challenges faced by postgraduate students at Nelson Mandela University. The thesis was conducted in Port Elizabeth, at Nelson Mandela University campus of Summerstrand focusing on post-graduate students in faculty of humanities. A qualitative research design and qualitative digital ethnographic research methodology was chosen as suitable for answering the research question. Data was collected using semi-structured interviews and transcribed verbatim. Data analysis included identifying consistent themes around notions of well-being and experiences of changing university culture in the responses. The thesis main findings reveal the impact of how the changing university institutional culture impacts post-graduate student’s wellbeing.The research found that students are affected by institutional cultures and this is narrated through their experience of university life and their reflections on #MustFall movements. The participants have detailed how the cultures in the university have a greater impact on the well-being on student because the university is more than just a place of learning but their home. The participants also detailed new colloquial ways of describing well-being using the term “inerves” and “umgowo” are general ways of describing their well-being. The dissertation has contributed to the limited body of knowledge in the context of post-graduate students experience and conception of well-being in the South African higher education. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Lebelo, Mpho Tiny
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55402 , vital:51990
- Description: Increasingly, students across the world in various tertiary institutions are faced with many challenges ranging from financial difficulties, accommodation, academic exclusion and many other challenges. Subsequently, the students’ academic performance suffers due to these challenges. This thesis therefore aims to focus on the perspectives of the post-graduate students at the Nelson Mandela University regarding the notion of wellbeing. This thesis attempts to uses a sociological indigenous perspective of wellbeing of “impilo” in describing well-being. Therefore, the thesis uses wellness as a conceptual framework to understand the challenges faced by postgraduate students at Nelson Mandela University. The thesis was conducted in Port Elizabeth, at Nelson Mandela University campus of Summerstrand focusing on post-graduate students in faculty of humanities. A qualitative research design and qualitative digital ethnographic research methodology was chosen as suitable for answering the research question. Data was collected using semi-structured interviews and transcribed verbatim. Data analysis included identifying consistent themes around notions of well-being and experiences of changing university culture in the responses. The thesis main findings reveal the impact of how the changing university institutional culture impacts post-graduate student’s wellbeing.The research found that students are affected by institutional cultures and this is narrated through their experience of university life and their reflections on #MustFall movements. The participants have detailed how the cultures in the university have a greater impact on the well-being on student because the university is more than just a place of learning but their home. The participants also detailed new colloquial ways of describing well-being using the term “inerves” and “umgowo” are general ways of describing their well-being. The dissertation has contributed to the limited body of knowledge in the context of post-graduate students experience and conception of well-being in the South African higher education. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
The impact of institutional cultures on student’s wellbeing among postgraduate students: the case of Nelson Mandela University in South Africa
- Authors: Lebelo, Mpho
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54450 , vital:46549
- Description: Increasingly, students across the world in various tertiary institutions are faced with many challenges ranging from financial difficulties, accommodation, academic exclusion and many other challenges. Subsequently, the students’ academic performance suffers due to these challenges. This thesis therefore aims to focus on the perspectives of the post-graduate students at the Nelson Mandela University regarding the notion of wellbeing. This thesis attempts to uses a sociological indigenous perspective of wellbeing of “impilo” in describing well-being. Therefore, the thesis uses wellness as a conceptual framework to understand the challenges faced by postgraduate students at Nelson Mandela University. The thesis was conducted in Port Elizabeth, at Nelson Mandela University campus of Summerstrand focusing on post-graduate students in faculty of humanities. A qualitative research design and qualitative digital ethnographic research methodology was chosen as suitable for answering the research question. Data was collected using semi-structured interviews and transcribed verbatim. Data analysis included identifying consistent themes around notions of well-being and experiences of changing university culture in the responses. The thesis main findings reveal the impact of how the changing university institutional culture impacts post-graduate student’s wellbeing. The research found that students are affected by institutional cultures and this is narrated through their experience of university life and their reflections on #MustFall movements. The participants have detailed how the cultures in the university have a greater impact on the well-being on student because the university is more than just a place of learning but their home. The participants also detailed new colloquial ways of describing well-being using the term “inerves” and “umgowo” are general ways of describing their well-being. The dissertation has contributed to the limited body of knowledge in the context of post-graduate students experience and conception of well-being in the South African higher education. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Lebelo, Mpho
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54450 , vital:46549
- Description: Increasingly, students across the world in various tertiary institutions are faced with many challenges ranging from financial difficulties, accommodation, academic exclusion and many other challenges. Subsequently, the students’ academic performance suffers due to these challenges. This thesis therefore aims to focus on the perspectives of the post-graduate students at the Nelson Mandela University regarding the notion of wellbeing. This thesis attempts to uses a sociological indigenous perspective of wellbeing of “impilo” in describing well-being. Therefore, the thesis uses wellness as a conceptual framework to understand the challenges faced by postgraduate students at Nelson Mandela University. The thesis was conducted in Port Elizabeth, at Nelson Mandela University campus of Summerstrand focusing on post-graduate students in faculty of humanities. A qualitative research design and qualitative digital ethnographic research methodology was chosen as suitable for answering the research question. Data was collected using semi-structured interviews and transcribed verbatim. Data analysis included identifying consistent themes around notions of well-being and experiences of changing university culture in the responses. The thesis main findings reveal the impact of how the changing university institutional culture impacts post-graduate student’s wellbeing. The research found that students are affected by institutional cultures and this is narrated through their experience of university life and their reflections on #MustFall movements. The participants have detailed how the cultures in the university have a greater impact on the well-being on student because the university is more than just a place of learning but their home. The participants also detailed new colloquial ways of describing well-being using the term “inerves” and “umgowo” are general ways of describing their well-being. The dissertation has contributed to the limited body of knowledge in the context of post-graduate students experience and conception of well-being in the South African higher education. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
The impact of transformed landscapes on the resource selection and occupancy of specialized browsing species in a lowland fynbos and renosterveld ecosystem
- Swanepoel, Hermanus Izak Johannes
- Authors: Swanepoel, Hermanus Izak Johannes
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54132 , vital:46308
- Description: Human activities have dramatically transformed the natural environment over the last century. In most cases these activities have resulted in the destruction and fragmentation of habitats. However, in some areas the transformation of landscapes through agriculture have created novel habitats which could benefit some species. The effect of these transformed landscapes on the resource selection and occupancy of antelope species in different vegetation types such as fynbos and renosterveld are still understudied. In order to investigate this,we conducted a study in the Overberg region of the Western Cape, South Africa. We studied theoccupancy and habitat useof five specialist browsing species (Tragelaphus scriptus sylvaticus(bushbuck), Rhaphicerus melanotis(cape grysbok), Sylvicapra grimmia(common duiker), Palea Capreolus(grey rhebok) and Rhaphicerus campestris(steenbok)) within a transformed landscape. We collected speciesdetection/ non-detectionand presence/ absence data using camera traps and road strip counts.Usinga single season, single species occupancy framework as a surrogate for habitat usewedeterminedhow transformed landscapes affected their occupancy. Using aniche factor analysis and resource selection functions wedetermine how transformed landscapes affected the resource selectionof these species. Our results from the resource selection analysis indicated that steenbok, grey rhebok, andcommon duiker included crops such as wheat and planted pastures in their resource selection while also including natural vegetation. Cape grysbok and bushbuck selected predominantly for natural vegetation areas such as critical biodiversity areas and ecological support areas while also including some crops in their resource selection. Our results from the occupancy analysis indicatedthat steenbok, grey rhebok and common duiker had a higher occupancy in the transformed landscape than in the natural landscape. Bushbuck and Cape grysbok showed little to no difference in their occupancy between land use types. The insight provided by our results will allow practitioners to maximise the potentialof these mosaic landscape in the Overberg for mammal conservation.The study also provides a baseline from which further research and monitoring programs can be developed to further understand the dynamics of this landscape. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Swanepoel, Hermanus Izak Johannes
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54132 , vital:46308
- Description: Human activities have dramatically transformed the natural environment over the last century. In most cases these activities have resulted in the destruction and fragmentation of habitats. However, in some areas the transformation of landscapes through agriculture have created novel habitats which could benefit some species. The effect of these transformed landscapes on the resource selection and occupancy of antelope species in different vegetation types such as fynbos and renosterveld are still understudied. In order to investigate this,we conducted a study in the Overberg region of the Western Cape, South Africa. We studied theoccupancy and habitat useof five specialist browsing species (Tragelaphus scriptus sylvaticus(bushbuck), Rhaphicerus melanotis(cape grysbok), Sylvicapra grimmia(common duiker), Palea Capreolus(grey rhebok) and Rhaphicerus campestris(steenbok)) within a transformed landscape. We collected speciesdetection/ non-detectionand presence/ absence data using camera traps and road strip counts.Usinga single season, single species occupancy framework as a surrogate for habitat usewedeterminedhow transformed landscapes affected their occupancy. Using aniche factor analysis and resource selection functions wedetermine how transformed landscapes affected the resource selectionof these species. Our results from the resource selection analysis indicated that steenbok, grey rhebok, andcommon duiker included crops such as wheat and planted pastures in their resource selection while also including natural vegetation. Cape grysbok and bushbuck selected predominantly for natural vegetation areas such as critical biodiversity areas and ecological support areas while also including some crops in their resource selection. Our results from the occupancy analysis indicatedthat steenbok, grey rhebok and common duiker had a higher occupancy in the transformed landscape than in the natural landscape. Bushbuck and Cape grysbok showed little to no difference in their occupancy between land use types. The insight provided by our results will allow practitioners to maximise the potentialof these mosaic landscape in the Overberg for mammal conservation.The study also provides a baseline from which further research and monitoring programs can be developed to further understand the dynamics of this landscape. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
- Full Text:
- Date Issued: 2021-12
The importance of public officials’ knowledge and understanding of the constitutional principles of public administration
- Authors: Zameko, Zamuxolo
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54596 , vital:46732
- Description: Public officials in South Africa have been accused of lacking accountability, transparency, corruption, inefficiencies, unethical practices and a general unmotivated approach to service delivery. Section 195 of the 1996 constitution emphasises the need for public officials to be efficient, effective and not to be partial in their execution of duty. On that basis the research sought to investigate whether the public officials can improve on their performance if they are exposed to and are knowledgeable of the constitution. The study utilized a qualitative research method and a document analysis in which documents which served as sources of information were selected based on their relevance to the subject area of Public Administration. The documents selected were legal instruments used to enforce the operations of public officials including the Constitution of South Africa (1996), Batho Pele, White Paper on the Transformation of the Public Service, 1995; Promotion of Access to Information (Act no 2 of 2000 and Promotion of Equality & Prevention of Unfair Discrimination (Ac no 4 of 2000) Findings of the research indicate that key skills of the public officials like effective communication, change management, conflict resolution, decision-making, negotiation and accountability can be enhanced if they are knowledgeable of their constitutional mandate. The Public Service board should among others emphasize on constitutional principles training of all its employees upon recruitment such that they are aware of the public expectations. Continuous on the job training should also be offered to public officials so that their operations are always adjusted to the prevailing environmental and technological conditions. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Zameko, Zamuxolo
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54596 , vital:46732
- Description: Public officials in South Africa have been accused of lacking accountability, transparency, corruption, inefficiencies, unethical practices and a general unmotivated approach to service delivery. Section 195 of the 1996 constitution emphasises the need for public officials to be efficient, effective and not to be partial in their execution of duty. On that basis the research sought to investigate whether the public officials can improve on their performance if they are exposed to and are knowledgeable of the constitution. The study utilized a qualitative research method and a document analysis in which documents which served as sources of information were selected based on their relevance to the subject area of Public Administration. The documents selected were legal instruments used to enforce the operations of public officials including the Constitution of South Africa (1996), Batho Pele, White Paper on the Transformation of the Public Service, 1995; Promotion of Access to Information (Act no 2 of 2000 and Promotion of Equality & Prevention of Unfair Discrimination (Ac no 4 of 2000) Findings of the research indicate that key skills of the public officials like effective communication, change management, conflict resolution, decision-making, negotiation and accountability can be enhanced if they are knowledgeable of their constitutional mandate. The Public Service board should among others emphasize on constitutional principles training of all its employees upon recruitment such that they are aware of the public expectations. Continuous on the job training should also be offered to public officials so that their operations are always adjusted to the prevailing environmental and technological conditions. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
The synthesis of anastrazole intermediates using continuous flow systems
- Authors: Tanyi, Sam Tambi
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54116 , vital:46304
- Description: In this study, the continuous flow synthesis of anastrozole intermediates were investigated using mesitylene as starting material. Anastrozole is an important drug used for the treatment of breast cancer. In the first step, mesitylene was brominated using N-bromosuccinimide to obtain 3,5-bis(bromomethyl)toluene. Selectivity became an issue due to the formation of two by-products; namely 1,3,5-tris(bromomethyl) benzene (the tribrominated by-product) and 1-(bromomethyl)-3,5-dimethylbenzene (the monobrominated by-product). Since the reaction parameters can be more precisely controlled in flow chemistry systems, we were able to optimize the formation the desired product 3,5-bis(bromomethyl)toluene. The reaction was initially optimized ina 15μLChemtrix glass micro reactor resulting in 100%conversion with 95%selectivity towards the desired product 3,5-bis(bromomethyl)toluenein 15 seconds, with a throughput of 0.006 g/h. The reaction was then scaled up in a 1.7 mLLTF reactor, equally yielding 100%conversion with 95%selectivityin 4minutes, with a throughput of2.01g/h. The bromination of mesitylene was also attempted in a homemade photochemical reactor consisting of a 3.02 polytetrafluoroethylene coil reactor and BLE-6T365 UV lamp. In this photochemical reactor, although 100%conversionwas again obtained only75%selectivity was achieved in 20minutes, with a throughput of 0.025g/h. This drop in selectivity was attributed to poorer mixing in the larger polytetrafluoroethylene coil reactor and possibly insufficient light penetration. The next step, involving the cyanation of 3,5-bis(bromomethyl)toluene to obtain 2,2'-(5-methyl-1,3-phenylene) diacetonitrilegave 100%conversion in 1 minute at 190 °C in a 1.7 mLLTFreactor, with a throughput of 5.2g/h. The subsequent methylation of 3,5-bis(cyanomethyl)toluene to obtain3,5-bis(1-cyano-1-methylethyl) toluene was investigated using a1mLpolytetrafluoroethylenecoil reactor, ultimatelyachieving99%conversionat40 °Cin 8minutes, with a throughput of 0.045g/h. Next, the bromination of3,5-bis(1-cyano-1-methylethyl)toluene using N-bromosuccinimideto yield 2,2'-(5-bromomethyl-1,3-phenylene)di(2-methyl propionitrile) gave 100%conversion at 120 °C in 4 minutes, with a throughput of 0.35g/h. Lastly, the multistep synthesis of 3,5-bis(cyanomethyl)toluene was done in two integrated 1.7 mLLTF reactors, using the predetermined optimum conditions to achieve 94%conversion towards 3,5-bis(cyanomethyl)toluene with a total r , Thesis (MSc) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Tanyi, Sam Tambi
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54116 , vital:46304
- Description: In this study, the continuous flow synthesis of anastrozole intermediates were investigated using mesitylene as starting material. Anastrozole is an important drug used for the treatment of breast cancer. In the first step, mesitylene was brominated using N-bromosuccinimide to obtain 3,5-bis(bromomethyl)toluene. Selectivity became an issue due to the formation of two by-products; namely 1,3,5-tris(bromomethyl) benzene (the tribrominated by-product) and 1-(bromomethyl)-3,5-dimethylbenzene (the monobrominated by-product). Since the reaction parameters can be more precisely controlled in flow chemistry systems, we were able to optimize the formation the desired product 3,5-bis(bromomethyl)toluene. The reaction was initially optimized ina 15μLChemtrix glass micro reactor resulting in 100%conversion with 95%selectivity towards the desired product 3,5-bis(bromomethyl)toluenein 15 seconds, with a throughput of 0.006 g/h. The reaction was then scaled up in a 1.7 mLLTF reactor, equally yielding 100%conversion with 95%selectivityin 4minutes, with a throughput of2.01g/h. The bromination of mesitylene was also attempted in a homemade photochemical reactor consisting of a 3.02 polytetrafluoroethylene coil reactor and BLE-6T365 UV lamp. In this photochemical reactor, although 100%conversionwas again obtained only75%selectivity was achieved in 20minutes, with a throughput of 0.025g/h. This drop in selectivity was attributed to poorer mixing in the larger polytetrafluoroethylene coil reactor and possibly insufficient light penetration. The next step, involving the cyanation of 3,5-bis(bromomethyl)toluene to obtain 2,2'-(5-methyl-1,3-phenylene) diacetonitrilegave 100%conversion in 1 minute at 190 °C in a 1.7 mLLTFreactor, with a throughput of 5.2g/h. The subsequent methylation of 3,5-bis(cyanomethyl)toluene to obtain3,5-bis(1-cyano-1-methylethyl) toluene was investigated using a1mLpolytetrafluoroethylenecoil reactor, ultimatelyachieving99%conversionat40 °Cin 8minutes, with a throughput of 0.045g/h. Next, the bromination of3,5-bis(1-cyano-1-methylethyl)toluene using N-bromosuccinimideto yield 2,2'-(5-bromomethyl-1,3-phenylene)di(2-methyl propionitrile) gave 100%conversion at 120 °C in 4 minutes, with a throughput of 0.35g/h. Lastly, the multistep synthesis of 3,5-bis(cyanomethyl)toluene was done in two integrated 1.7 mLLTF reactors, using the predetermined optimum conditions to achieve 94%conversion towards 3,5-bis(cyanomethyl)toluene with a total r , Thesis (MSc) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text:
- Date Issued: 2021-12
The synthesis, empirical and theoretical studies of various (N→B) diarylborinate esters
- Authors: Manana, Pholani Sakhile
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53869 , vital:46027
- Description: A series of core-functionalized borinic acids was synthesized from Grignard reagents and tributylborate and reacted with ethanolamine, amino acids, 2-pyridylmethanol as well as 2-(ethyl amino ethanol). Among the borinic acids synthesized were the ones bearing: para-(2, 15, 16, 22, 27)-methyl, (3, 20, 25)-chloro, (4, 23, 26)-fluoro, (5)-methoxy; meta-(7, 17)-methyl, (9)-fluoro; ortho-(6)-methyl, (8)-chloro, (10, 18, 19)-methoxy substituents on their respective aromatic systems. All compounds obtained by condensation of the borinic acids with the aforementioned nitrogen-containing substrates were characterized structurally by means of diffraction studies based on single crystals and found to constitute chelate esters/amides featuring covalent B-O and dative N→B bonds. The chelate compounds researched in this study could be classified into four families and represent the compounds: ethanol amine: (1) 2,2-diphenyl-1,3,2-oxazaborolidines, (2) 2,2-bis(p-tolyl)-1,3,2-oxazaborolidines, (3) 2,2-bis(p-chlorophenyl)-1,3,2-oxazaborolidines, (4) 2,2-bis(p-fluorophenyl)-1,3,2-oxazaborolidines, (5) 2,2-bis(p-methoxyphenyl)-1,3,2-oxazaborolidines, (6) 2,2-bis(o-tolyl)-1,3,2-oxazaborolidines, (7) 2,2-bis(m-tolyl)-1,3,2-oxazaborolidines, (8) 2,2-bis(o-chlorophenyl)-1,3,2-oxazaborolidines, (9) 2,2-bis(m-fluorophenyl)-1,3,2-oxazaborolidines, (10) 2,2-bis(o-methoxyphenyl)-1,3,2-oxazaborolidines. α-amino acids : (14) 4-methyl-2,2-diphenyl-1,3,2-oxazaborolidin-5-ones, (15) 2,2-bis(p-tolyl)-1,3,2-oxazaborolidin-5-ones, (16) 4-methyl-2,2-bis(p-tolyl)-1,3,2-oxazaborolidin-5-ones, (17) 4-isopropyl-2,2-bis(m-tolyl)-1,3,2-oxazaborolidin-5-ones, (18) 4-methyl-2,2-bis(o-methoxyphenyl)-1,3,2- oxazaborolidin-5-ones, (19) 4-acetamidyl-2,2-bis(o-methoxyphenyl)-1,3,2- oxazaborolidin-5-ones, (20) 4-phenylethane-2,2-bis(p-chlorophenyl)-1,3,2 oxazaborolidin-5-ones. 2-pyridylmethanol: (21) 1,3-hydroxypyridyl-2,2-diphenyl 1,3,2-oxazaborolidines, (22) 1,3-hydroxypyridyl-2,2-bis(p-tolyl)-1,3,2-oxazaborolidines, (23) 1,3-hydroxypyridyl-2,2-bis(p-fluorophenyl)-1,3,2-oxazaborolidines 2-(ethyl amino ethanol): (24) 3-ethyl-2,2-diphenyl-1,3,2-oxazaborolidines, (25) 3-ethyl-2,2-bis(p-chlorophenyl)-1,3,2-oxazaborolidines, (26) 3-ethyl-2,2-bis(p-fluorophenyl)-1,3,2-oxazaborolidines, (27) 3-ethyl-2,2-bis(p-tolyl)-1,3,2-oxazaborolidines. Apart from structural studies in the solid state, the compounds were also characterized by means of multinuclear NMR spectroscopy (1H, 11B, 13C) as well as UV/vis and FTIR. The typical 11B resonances were found in the range of (4-10 ppm). A series of characteristic metrical parameters for the compounds in the solid state as well as typical NMR shifts for the chelate target molecules was established that allowed for the determination of the coordination induced shift. The carbon atom bonded to the oxygen atom shifted upfield, while the carbon atom bonded to the nitrogen atom shifted downfield. Factors mentioned in the literature that has an influence on the hydrolytic stability on the heterocyclic borinate motif have been taken into consideration and verified for the systems researched in this study. The substitution at the nitrogen atom with one ethyl group caused the greatest increases in the N→B bond length (27) 1.714 Å, due to the increase in the nitrogen Lewis basicity, making it the least hydrolytically stable, these include compounds (24-26). Furthermore, DFT calculations were performed by employing Becke’s three parameter hybrid exchange functional with Lee–Yang–Parr functional (B3LYP) method using the Gaussian 16 program package (Rev. B01) employing the basis set 6-311++G(d,p), to corroborate and correlate the experimental findings, which gave a general R-squared value of 0.9978 for calculated vs experimental 13C chemical shifts. Thermal properties are recorded for select compounds, indicating the ΔH and the melting points. , Thesis (PhD) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Manana, Pholani Sakhile
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53869 , vital:46027
- Description: A series of core-functionalized borinic acids was synthesized from Grignard reagents and tributylborate and reacted with ethanolamine, amino acids, 2-pyridylmethanol as well as 2-(ethyl amino ethanol). Among the borinic acids synthesized were the ones bearing: para-(2, 15, 16, 22, 27)-methyl, (3, 20, 25)-chloro, (4, 23, 26)-fluoro, (5)-methoxy; meta-(7, 17)-methyl, (9)-fluoro; ortho-(6)-methyl, (8)-chloro, (10, 18, 19)-methoxy substituents on their respective aromatic systems. All compounds obtained by condensation of the borinic acids with the aforementioned nitrogen-containing substrates were characterized structurally by means of diffraction studies based on single crystals and found to constitute chelate esters/amides featuring covalent B-O and dative N→B bonds. The chelate compounds researched in this study could be classified into four families and represent the compounds: ethanol amine: (1) 2,2-diphenyl-1,3,2-oxazaborolidines, (2) 2,2-bis(p-tolyl)-1,3,2-oxazaborolidines, (3) 2,2-bis(p-chlorophenyl)-1,3,2-oxazaborolidines, (4) 2,2-bis(p-fluorophenyl)-1,3,2-oxazaborolidines, (5) 2,2-bis(p-methoxyphenyl)-1,3,2-oxazaborolidines, (6) 2,2-bis(o-tolyl)-1,3,2-oxazaborolidines, (7) 2,2-bis(m-tolyl)-1,3,2-oxazaborolidines, (8) 2,2-bis(o-chlorophenyl)-1,3,2-oxazaborolidines, (9) 2,2-bis(m-fluorophenyl)-1,3,2-oxazaborolidines, (10) 2,2-bis(o-methoxyphenyl)-1,3,2-oxazaborolidines. α-amino acids : (14) 4-methyl-2,2-diphenyl-1,3,2-oxazaborolidin-5-ones, (15) 2,2-bis(p-tolyl)-1,3,2-oxazaborolidin-5-ones, (16) 4-methyl-2,2-bis(p-tolyl)-1,3,2-oxazaborolidin-5-ones, (17) 4-isopropyl-2,2-bis(m-tolyl)-1,3,2-oxazaborolidin-5-ones, (18) 4-methyl-2,2-bis(o-methoxyphenyl)-1,3,2- oxazaborolidin-5-ones, (19) 4-acetamidyl-2,2-bis(o-methoxyphenyl)-1,3,2- oxazaborolidin-5-ones, (20) 4-phenylethane-2,2-bis(p-chlorophenyl)-1,3,2 oxazaborolidin-5-ones. 2-pyridylmethanol: (21) 1,3-hydroxypyridyl-2,2-diphenyl 1,3,2-oxazaborolidines, (22) 1,3-hydroxypyridyl-2,2-bis(p-tolyl)-1,3,2-oxazaborolidines, (23) 1,3-hydroxypyridyl-2,2-bis(p-fluorophenyl)-1,3,2-oxazaborolidines 2-(ethyl amino ethanol): (24) 3-ethyl-2,2-diphenyl-1,3,2-oxazaborolidines, (25) 3-ethyl-2,2-bis(p-chlorophenyl)-1,3,2-oxazaborolidines, (26) 3-ethyl-2,2-bis(p-fluorophenyl)-1,3,2-oxazaborolidines, (27) 3-ethyl-2,2-bis(p-tolyl)-1,3,2-oxazaborolidines. Apart from structural studies in the solid state, the compounds were also characterized by means of multinuclear NMR spectroscopy (1H, 11B, 13C) as well as UV/vis and FTIR. The typical 11B resonances were found in the range of (4-10 ppm). A series of characteristic metrical parameters for the compounds in the solid state as well as typical NMR shifts for the chelate target molecules was established that allowed for the determination of the coordination induced shift. The carbon atom bonded to the oxygen atom shifted upfield, while the carbon atom bonded to the nitrogen atom shifted downfield. Factors mentioned in the literature that has an influence on the hydrolytic stability on the heterocyclic borinate motif have been taken into consideration and verified for the systems researched in this study. The substitution at the nitrogen atom with one ethyl group caused the greatest increases in the N→B bond length (27) 1.714 Å, due to the increase in the nitrogen Lewis basicity, making it the least hydrolytically stable, these include compounds (24-26). Furthermore, DFT calculations were performed by employing Becke’s three parameter hybrid exchange functional with Lee–Yang–Parr functional (B3LYP) method using the Gaussian 16 program package (Rev. B01) employing the basis set 6-311++G(d,p), to corroborate and correlate the experimental findings, which gave a general R-squared value of 0.9978 for calculated vs experimental 13C chemical shifts. Thermal properties are recorded for select compounds, indicating the ΔH and the melting points. , Thesis (PhD) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text:
- Date Issued: 2021-12
The use of ambient seismic noise to investigate internal changes in a tailings storage facility and to image the subsurface geology in the Cradock area of the Eastern Cape
- Authors: Kunjwa, Thulisile
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53642 , vital:45690
- Description: Passive seismic interferometry is a process by which ambient noise data recorded at different seismic stations can be cross-correlated to estimate Green's functions. In the past, both surface waves and body waves have successfully been extracted by cross-correlation of ambient noise data on both regional and global scales. Recent advancements in ambient seismic noise techniques have the potential to provide new methods for subsurface imaging and monitoring. The ambient noise data processing procedure divides into four principal phases: (1) single station data preparation, (2) cross-correlation and temporal stacking, (3) measurement of dispersion curves and (4) inversion of dispersion curves to obtain 1-D shear wave profiles and computation of 2-D shear wave velocity cross-section. The purpose of this study is to investigate whether ambient seismic noise can be used to image and detect internal changes within a mine tailings dam wall and to image the subsurface geology of part of the Eastern Cape Karoo near Cradock. In the first experiment, the investigation consisted of continuous ambient noise data recordings over a period of 3 days with 20 three-component short period geophones. The geophones were deployed over a survey wall of roughly 100 m in length at the Harmony Gold mine tailings dam in Welkom. In the second experiment, the investigation consisted of data recordings over a period of 35 days. The geophones were deployed in Cradock. The first phase of the data processing procedure included de-trending, de-meaning and band-pass filtering the data. This was done to ensure that any long period trends associated with instrument glitches are removed from the data. A spectrogram was then computed to view the spectrum of frequencies in the signal and to check if the filter that was designed was able to cut off the unwanted frequencies. The horizontal and vertical components of the ambient noise data were cross-correlated and picked between sensor pairs to create surface wave dispersion curves. Subsequently, the dispersion curves were inverted to estimate the shear wave velocity of the dam wall and subsurface as a function of depth. The computed cross sections of shear wave velocity indicated a low-velocity zone between 2 and 10 m below the surface on the dam wall, this suggested that the phreatic surface is much closer to surface in this area. In the second experiment, the interpolated shear wave velocity profiles indicated that there is a layer of low velocity zone between depths 250 to 300 m below the surface. The cross-correlations were also used to compute group velocity maps from periods 1.5 seconds to 30 seconds. The group velocity maps showed various high and low velocity anomalies. The high velocity zones observed on the eastern section of the map were interpreted as evidence of dolerite intrusions. The low velocity zones observed in the western and southern sections of the map interpreted as Karoo sediments that belong to the Adelaide Subgroup which is dominated by mudstones. , Thesis (MSc) -- Faculty of Science, Department of Geosciences (Geology and Geography), 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Kunjwa, Thulisile
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53642 , vital:45690
- Description: Passive seismic interferometry is a process by which ambient noise data recorded at different seismic stations can be cross-correlated to estimate Green's functions. In the past, both surface waves and body waves have successfully been extracted by cross-correlation of ambient noise data on both regional and global scales. Recent advancements in ambient seismic noise techniques have the potential to provide new methods for subsurface imaging and monitoring. The ambient noise data processing procedure divides into four principal phases: (1) single station data preparation, (2) cross-correlation and temporal stacking, (3) measurement of dispersion curves and (4) inversion of dispersion curves to obtain 1-D shear wave profiles and computation of 2-D shear wave velocity cross-section. The purpose of this study is to investigate whether ambient seismic noise can be used to image and detect internal changes within a mine tailings dam wall and to image the subsurface geology of part of the Eastern Cape Karoo near Cradock. In the first experiment, the investigation consisted of continuous ambient noise data recordings over a period of 3 days with 20 three-component short period geophones. The geophones were deployed over a survey wall of roughly 100 m in length at the Harmony Gold mine tailings dam in Welkom. In the second experiment, the investigation consisted of data recordings over a period of 35 days. The geophones were deployed in Cradock. The first phase of the data processing procedure included de-trending, de-meaning and band-pass filtering the data. This was done to ensure that any long period trends associated with instrument glitches are removed from the data. A spectrogram was then computed to view the spectrum of frequencies in the signal and to check if the filter that was designed was able to cut off the unwanted frequencies. The horizontal and vertical components of the ambient noise data were cross-correlated and picked between sensor pairs to create surface wave dispersion curves. Subsequently, the dispersion curves were inverted to estimate the shear wave velocity of the dam wall and subsurface as a function of depth. The computed cross sections of shear wave velocity indicated a low-velocity zone between 2 and 10 m below the surface on the dam wall, this suggested that the phreatic surface is much closer to surface in this area. In the second experiment, the interpolated shear wave velocity profiles indicated that there is a layer of low velocity zone between depths 250 to 300 m below the surface. The cross-correlations were also used to compute group velocity maps from periods 1.5 seconds to 30 seconds. The group velocity maps showed various high and low velocity anomalies. The high velocity zones observed on the eastern section of the map were interpreted as evidence of dolerite intrusions. The low velocity zones observed in the western and southern sections of the map interpreted as Karoo sediments that belong to the Adelaide Subgroup which is dominated by mudstones. , Thesis (MSc) -- Faculty of Science, Department of Geosciences (Geology and Geography), 2021
- Full Text:
- Date Issued: 2021-12
The use of photography to visualise abstracted narratives of emotions associated with trauma
- Authors: Warner, Lauren
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54585 , vital:46726
- Description: The purpose of this qualitative research study is to comment on the use of photography to visualise abstracted narratives of the emotions associated with trauma. This is a practicebased study developed on the interweaving of theoretical and practical output. The practical output produced a photographic body of work which argues in favour of an abstracted narrative for the visualisation of trauma by engaging with visualised emotions associated with trauma. The theoretical output of the study relates to three visual themes: firstly, the direct or actual moment of trauma; secondly, the triggering of the traumatic experience and lastly, the abstracted narrative of emotions associated with trauma. Photographing a traumatic event freezes a moment in which the subjects are continually engaging in the traumatic experience. Sontag (2003: 93) asserts that this type of direct photographic representation should be discouraged for fear of aestheticising pain and desensitising the viewer to horror. The study aims not to visualise actual traumatic events, but rather to engage with abstracted narratives of emotions associated with trauma experienced or felt, both directly and indirectly. This is achieved by firstly, providing a context on how the role of photography dealing with trauma has evolved to move beyond the depiction of an actual traumatic experience. Secondly, Gillian Rose’s (2016) Visual Methodologies Framework is introduced and photographers Roger Ballen’s Cut Loose (2015) and Jo Ractliffe’s 1999 work entitled Vlakplaas: 2 June 1999 (Drive-by Shooting) analysed as visual expressions of trauma. Similarly, photographers Robert Frank’s 1978 work entitled Sick of goodby’s and Manuela Thames’s 2019 work entitled Trauma are analysed to reflect on the use of abstracted narratives as they comment on personal traumatic experiences. Lastly, the body of work produced in the practice-based output of the study, Public Places: Private Spaces, are analysed as a vehicle through which emotions are associated with trauma. These traumatic experiences are visually expressed using abstracted images in triptych narratives. This study contributes to the current body of knowledge by critically addressing ways of thinking about the visualisation of trauma. This provides insight into the topic of trauma and the various ways in which it could be visualised without depicting the actual trauma (with the potential of continuously wounding or replaying trauma) and instead engaging with the visualised traumatic experience as an abstracted narrative within a South African context. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Warner, Lauren
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54585 , vital:46726
- Description: The purpose of this qualitative research study is to comment on the use of photography to visualise abstracted narratives of the emotions associated with trauma. This is a practicebased study developed on the interweaving of theoretical and practical output. The practical output produced a photographic body of work which argues in favour of an abstracted narrative for the visualisation of trauma by engaging with visualised emotions associated with trauma. The theoretical output of the study relates to three visual themes: firstly, the direct or actual moment of trauma; secondly, the triggering of the traumatic experience and lastly, the abstracted narrative of emotions associated with trauma. Photographing a traumatic event freezes a moment in which the subjects are continually engaging in the traumatic experience. Sontag (2003: 93) asserts that this type of direct photographic representation should be discouraged for fear of aestheticising pain and desensitising the viewer to horror. The study aims not to visualise actual traumatic events, but rather to engage with abstracted narratives of emotions associated with trauma experienced or felt, both directly and indirectly. This is achieved by firstly, providing a context on how the role of photography dealing with trauma has evolved to move beyond the depiction of an actual traumatic experience. Secondly, Gillian Rose’s (2016) Visual Methodologies Framework is introduced and photographers Roger Ballen’s Cut Loose (2015) and Jo Ractliffe’s 1999 work entitled Vlakplaas: 2 June 1999 (Drive-by Shooting) analysed as visual expressions of trauma. Similarly, photographers Robert Frank’s 1978 work entitled Sick of goodby’s and Manuela Thames’s 2019 work entitled Trauma are analysed to reflect on the use of abstracted narratives as they comment on personal traumatic experiences. Lastly, the body of work produced in the practice-based output of the study, Public Places: Private Spaces, are analysed as a vehicle through which emotions are associated with trauma. These traumatic experiences are visually expressed using abstracted images in triptych narratives. This study contributes to the current body of knowledge by critically addressing ways of thinking about the visualisation of trauma. This provides insight into the topic of trauma and the various ways in which it could be visualised without depicting the actual trauma (with the potential of continuously wounding or replaying trauma) and instead engaging with the visualised traumatic experience as an abstracted narrative within a South African context. , Thesis (MA) -- Faculty of Humanities, School of Visual and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12