Bollywood Nights: Indian youth and the creation of diasporic identity in South Africa
- Authors: Boshoff, Priscilla A
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143494 , vital:38251 , DOI: 10.3138/topia.26.29
- Description: Bollywoodâs popularity as a global cultural form has occurred at the same time as the valorization of difference in the South African political landscape. As the youngest members of the 19th-century labour diaspora, South African Indian youths are the inheritors of a conservativeâyet adaptableâhome culture amidst the marginalized identities of (post-)apartheid South Africa. Their desire to create an identity for themselves that encompasses their self-perception both as modern South African subjects and as guardians of their traditional home cultures is achieved through Bollywood, which speaks to its diasporic audiences through images of an idealized traditional yet modern India. While India is not a place of return for these youth, their reactivation of a diasporic identity through Bollywoodâs representations of a successful Indian diasporic culture and their participation in South African Bollywood concerts and award ceremonies has provided an opportunity for young South African Indians to reimagine their diasporic Indian identity in ways that (re-)connect them to India and to an imagined global diaspora.
- Full Text:
- Date Issued: 2018
- Authors: Boshoff, Priscilla A
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143494 , vital:38251 , DOI: 10.3138/topia.26.29
- Description: Bollywoodâs popularity as a global cultural form has occurred at the same time as the valorization of difference in the South African political landscape. As the youngest members of the 19th-century labour diaspora, South African Indian youths are the inheritors of a conservativeâyet adaptableâhome culture amidst the marginalized identities of (post-)apartheid South Africa. Their desire to create an identity for themselves that encompasses their self-perception both as modern South African subjects and as guardians of their traditional home cultures is achieved through Bollywood, which speaks to its diasporic audiences through images of an idealized traditional yet modern India. While India is not a place of return for these youth, their reactivation of a diasporic identity through Bollywoodâs representations of a successful Indian diasporic culture and their participation in South African Bollywood concerts and award ceremonies has provided an opportunity for young South African Indians to reimagine their diasporic Indian identity in ways that (re-)connect them to India and to an imagined global diaspora.
- Full Text:
- Date Issued: 2018
Between a cushion and a risky conversation: ARTS LOUNGE reviewed
- Authors: Baasch, Rachel M
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147703 , vital:38662 , https://doi.org/10.1080/00043389.2011.11877155
- Description: On the fringe of the National Arts Festival, at a point of transition between Rhodes University campus and the commercial side of Grahamstown, the walls of a former home and former horse-stable, now a research house, reverberate with the strain of cross-disciplinary, site-specific collaboration. The ARTS LOUNGE made its first official appearance at the Grahamstown National Arts Festival (ViPPA Research Center, Rhodes University) from 30 June to 9 July 2011. The ten-day event was organised by the Visual and Performing Arts of Africa Research (ViPPA) team in collaboration with musicians, artists, writers, performers and members of the public.
- Full Text:
- Date Issued: 2017
- Authors: Baasch, Rachel M
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147703 , vital:38662 , https://doi.org/10.1080/00043389.2011.11877155
- Description: On the fringe of the National Arts Festival, at a point of transition between Rhodes University campus and the commercial side of Grahamstown, the walls of a former home and former horse-stable, now a research house, reverberate with the strain of cross-disciplinary, site-specific collaboration. The ARTS LOUNGE made its first official appearance at the Grahamstown National Arts Festival (ViPPA Research Center, Rhodes University) from 30 June to 9 July 2011. The ten-day event was organised by the Visual and Performing Arts of Africa Research (ViPPA) team in collaboration with musicians, artists, writers, performers and members of the public.
- Full Text:
- Date Issued: 2017
Current developments in arbuscular mycorrhizal fungi research and its role in salinity stress alleviation a biotechnological perspective
- Kumar, Ashwani, Dames, Joanna F, Gupta, Aditi, Sharma, Satyawati, Gilbert, Jack A, Ahmad, Parvaiz
- Authors: Kumar, Ashwani , Dames, Joanna F , Gupta, Aditi , Sharma, Satyawati , Gilbert, Jack A , Ahmad, Parvaiz
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/443998 , vital:74177 , https://doi.org/10.3109/07388551.2014.899964
- Description: Arbuscular mycorrhizal fungi (AMF) form widespread symbiotic associations with 80% of known land plants. They play a major role in plant nutrition, growth, water absorption, nutrient cycling and protection from pathogens, and as a result, contribute to ecosystem processes. Salinity stress conditions undoubtedly limit plant productivity and, therefore, the role of AMF as a biological tool for improving plant salt stress tolerance, is gaining economic importance worldwide. However, this approach requires a better understanding of how plants and AMF intimately interact with each other in saline environments and how this interaction leads to physiological changes in plants. This knowledge is important to develop sustainable strategies for successful utilization of AMF to improve plant health under a variety of stress conditions. Recent advances in the field of molecular biology, âomicsâ technology and advanced microscopy can provide new insight about these mechanisms of interaction between AMF and plants, as well as other microbes. This review mainly discusses the effect of salinity on AMF and plants, and role of AMF in alleviation of salinity stress including insight on methods for AMF identification. The focus remains on latest advancements in mycorrhizal research that can potentially offer an integrative understanding of the role of AMF in salinity tolerance and sustainable crop production.
- Full Text:
- Date Issued: 2015
- Authors: Kumar, Ashwani , Dames, Joanna F , Gupta, Aditi , Sharma, Satyawati , Gilbert, Jack A , Ahmad, Parvaiz
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/443998 , vital:74177 , https://doi.org/10.3109/07388551.2014.899964
- Description: Arbuscular mycorrhizal fungi (AMF) form widespread symbiotic associations with 80% of known land plants. They play a major role in plant nutrition, growth, water absorption, nutrient cycling and protection from pathogens, and as a result, contribute to ecosystem processes. Salinity stress conditions undoubtedly limit plant productivity and, therefore, the role of AMF as a biological tool for improving plant salt stress tolerance, is gaining economic importance worldwide. However, this approach requires a better understanding of how plants and AMF intimately interact with each other in saline environments and how this interaction leads to physiological changes in plants. This knowledge is important to develop sustainable strategies for successful utilization of AMF to improve plant health under a variety of stress conditions. Recent advances in the field of molecular biology, âomicsâ technology and advanced microscopy can provide new insight about these mechanisms of interaction between AMF and plants, as well as other microbes. This review mainly discusses the effect of salinity on AMF and plants, and role of AMF in alleviation of salinity stress including insight on methods for AMF identification. The focus remains on latest advancements in mycorrhizal research that can potentially offer an integrative understanding of the role of AMF in salinity tolerance and sustainable crop production.
- Full Text:
- Date Issued: 2015
The effect of sewage effluent from De Beers marine diamond mining operations on the expression of cytochrome P450 (CYP1A) and vitellogenin (vtg)
- Authors: De Almeida, Louise
- Date: 2013-09-20
- Subjects: De Beers Consolidated Mines , Sewage disposal in rivers, lakes, etc. -- Namibia , Endocrine disrupting chemicals in water -- Namibia , Merluccius capensis -- Namibia , Merluccius -- Namibia , Water -- Pollution -- Namibia
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4096 , http://hdl.handle.net/10962/d1009440 , De Beers Consolidated Mines , Sewage disposal in rivers, lakes, etc. -- Namibia , Endocrine disrupting chemicals in water -- Namibia , Merluccius capensis -- Namibia , Merluccius -- Namibia , Water -- Pollution -- Namibia
- Description: Sewage effluents disposed into the marine environment from De Beers Marine Namibia diamond mining vessels have the potential to cause endocrine disruptive effects in marine organisms. Endocrine disruption refers to the alteration of the normal functioning of the endocrine system and various chemicals have the ability to mimic hormones, effecting endogenous hormone synthesis, transport, receptor interaction and intracellular signaling. The potential endocrine disruptive effects, caused by the release of different types of sewage effluents into the ocean, on fish species is a concern due to the commercial importance of fish species found in the mining area e.g. hake, sole, horse mackerel. Increased awareness of marine environmental degradation due to the presence of chemical contaminants has resulted in research being done on early warning systems, in the form of biomarkers. Cytochrome P450 monooxygenase 1A (CYP1A) and vitellogenin (vtg) are important proteins found in fish liver and blood, that have been used as biomarkers for the detection of pollutants in fish. CYP1A is a subfamily of the P450 superfamily of enzymes and catalyzes the oxidation, hydrolysis and reduction of exogenous and endogenous compounds (phase I reactions) and thus has the capacity to regulate the metabolism of several organic contaminants. CYP1A expression is altered by exposure to planar xenobiotic compounds e.g. polyaromatic hydrocarbons. Vtg is an important precursor for egg yolk proteins and plays a role in the growth and development of an oocyte. Expression of this protein is altered upon exposure to estrogenic compounds. The aim of this project was to isolate CYP1A from fish liver by differential centrifugation and optimize conditions for the CYP1A-mediated ethoxyresorufin-Odeethylase (EROD) assay and western blot analysis (to assess CYP1A expression). Another aim of this study was to evaluate the potential effects of biologically disruptive chemicals from sewage effluents, discharged into the marine environment, on the expression of CYP1A in two species of hake, Merluccius capensis and M. paradoxus (Cape hake). CYP1A in Cape hake is approximately a 60 kDa protein and the highest EROD activity was detected in the microsomal fraction after differential centrifugation. Optimal EROD assay conditions were observed at pH 7.5, a temperature of 25 °C, 10 Όl of sample and a reaction time of 30 seconds. Enzyme stability assays indicated a drastic decrease in enzyme activity after 30 seconds. The EROD assay was not NADPH dependent but was limited by NADPH supply, with an increase of 300% in EROD activity being observed with the addition of 0.1 M exogenous NADPH. The addition of dicumarol (40 ΌM), a phase II enzyme inhibitor, showed a 232% increase in EROD activity. This is because dicumarol inhibited enzymes with the capacity to metabolize the product (resorufin) of the EROD reaction. With regard to western blot analysis, the optimal primary (rabbit antifish CYP1A peptide) and secondary (anti-mouse/rabbit antibody-horseradish peroxidase conjugate (POD)) antibody dilutions were determined to be 1:1000 and 1:5000, respectively. The comparison of CYP1A expression in Cape hake samples from De Beers Marine mining area and reference sites showed higher EROD activity (16.29 ± 0.91 pmol/min) in fish samples from the mining area in comparison to the reference site (10.42 ± 2.65 pmol/min). Western blot analysis was in agreement with the EROD assay results and a higher CYP1A expression was observed in fish from the mining sites. The increased CYP1A expression observed in fish from the mining area is not definitively an indication of a pollutant effect in the environment, as several environmental and biological factors (e.g. photoperiod and age) must also be considered before reaching this conclusion. Another aim of this study was to purify vtg from Cape hake blood samples. Cape hake vtg was purified from fish plasma by selective precipitation with MgCl2 and EDTA. Precipitated sample was subjected to anion exchange chromatography using fast protein liquid chromatography (FPLC). Vtg eluted as two broad peaks and had a molecular weight above 200 kDa. SDS-PAGE analysis also resolved smaller molecular weight proteins below 70 kDa, which were thought to be vitellogenin cleavage proteins, lipovitellin and phosphovitins. Western blot analysis was performed; however, it did not produce any conclusive results. The purification of vtg enables further studies in characterizing this protein and developing assay aimed at detecting estrogenic pollutants in the marine environment
- Full Text:
- Authors: De Almeida, Louise
- Date: 2013-09-20
- Subjects: De Beers Consolidated Mines , Sewage disposal in rivers, lakes, etc. -- Namibia , Endocrine disrupting chemicals in water -- Namibia , Merluccius capensis -- Namibia , Merluccius -- Namibia , Water -- Pollution -- Namibia
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4096 , http://hdl.handle.net/10962/d1009440 , De Beers Consolidated Mines , Sewage disposal in rivers, lakes, etc. -- Namibia , Endocrine disrupting chemicals in water -- Namibia , Merluccius capensis -- Namibia , Merluccius -- Namibia , Water -- Pollution -- Namibia
- Description: Sewage effluents disposed into the marine environment from De Beers Marine Namibia diamond mining vessels have the potential to cause endocrine disruptive effects in marine organisms. Endocrine disruption refers to the alteration of the normal functioning of the endocrine system and various chemicals have the ability to mimic hormones, effecting endogenous hormone synthesis, transport, receptor interaction and intracellular signaling. The potential endocrine disruptive effects, caused by the release of different types of sewage effluents into the ocean, on fish species is a concern due to the commercial importance of fish species found in the mining area e.g. hake, sole, horse mackerel. Increased awareness of marine environmental degradation due to the presence of chemical contaminants has resulted in research being done on early warning systems, in the form of biomarkers. Cytochrome P450 monooxygenase 1A (CYP1A) and vitellogenin (vtg) are important proteins found in fish liver and blood, that have been used as biomarkers for the detection of pollutants in fish. CYP1A is a subfamily of the P450 superfamily of enzymes and catalyzes the oxidation, hydrolysis and reduction of exogenous and endogenous compounds (phase I reactions) and thus has the capacity to regulate the metabolism of several organic contaminants. CYP1A expression is altered by exposure to planar xenobiotic compounds e.g. polyaromatic hydrocarbons. Vtg is an important precursor for egg yolk proteins and plays a role in the growth and development of an oocyte. Expression of this protein is altered upon exposure to estrogenic compounds. The aim of this project was to isolate CYP1A from fish liver by differential centrifugation and optimize conditions for the CYP1A-mediated ethoxyresorufin-Odeethylase (EROD) assay and western blot analysis (to assess CYP1A expression). Another aim of this study was to evaluate the potential effects of biologically disruptive chemicals from sewage effluents, discharged into the marine environment, on the expression of CYP1A in two species of hake, Merluccius capensis and M. paradoxus (Cape hake). CYP1A in Cape hake is approximately a 60 kDa protein and the highest EROD activity was detected in the microsomal fraction after differential centrifugation. Optimal EROD assay conditions were observed at pH 7.5, a temperature of 25 °C, 10 Όl of sample and a reaction time of 30 seconds. Enzyme stability assays indicated a drastic decrease in enzyme activity after 30 seconds. The EROD assay was not NADPH dependent but was limited by NADPH supply, with an increase of 300% in EROD activity being observed with the addition of 0.1 M exogenous NADPH. The addition of dicumarol (40 ΌM), a phase II enzyme inhibitor, showed a 232% increase in EROD activity. This is because dicumarol inhibited enzymes with the capacity to metabolize the product (resorufin) of the EROD reaction. With regard to western blot analysis, the optimal primary (rabbit antifish CYP1A peptide) and secondary (anti-mouse/rabbit antibody-horseradish peroxidase conjugate (POD)) antibody dilutions were determined to be 1:1000 and 1:5000, respectively. The comparison of CYP1A expression in Cape hake samples from De Beers Marine mining area and reference sites showed higher EROD activity (16.29 ± 0.91 pmol/min) in fish samples from the mining area in comparison to the reference site (10.42 ± 2.65 pmol/min). Western blot analysis was in agreement with the EROD assay results and a higher CYP1A expression was observed in fish from the mining sites. The increased CYP1A expression observed in fish from the mining area is not definitively an indication of a pollutant effect in the environment, as several environmental and biological factors (e.g. photoperiod and age) must also be considered before reaching this conclusion. Another aim of this study was to purify vtg from Cape hake blood samples. Cape hake vtg was purified from fish plasma by selective precipitation with MgCl2 and EDTA. Precipitated sample was subjected to anion exchange chromatography using fast protein liquid chromatography (FPLC). Vtg eluted as two broad peaks and had a molecular weight above 200 kDa. SDS-PAGE analysis also resolved smaller molecular weight proteins below 70 kDa, which were thought to be vitellogenin cleavage proteins, lipovitellin and phosphovitins. Western blot analysis was performed; however, it did not produce any conclusive results. The purification of vtg enables further studies in characterizing this protein and developing assay aimed at detecting estrogenic pollutants in the marine environment
- Full Text:
An organisation development intervention in an Anglican church theological seminary in Southern Africa
- Authors: Chinganga, Percy
- Date: 2013-08-08
- Subjects: College of the Transfiguration (Grahamstown, South Africa) Organizational change -- Church of England -- Africa, Southern Leadership -- Religious aspects -- Christianity -- Africa, Southern Church management -- Church of England -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1959 , http://hdl.handle.net/10962/d1008377
- Description: "Organisation development is a planned, systematic process in which applied behavioral science principles and practices are introduced into ongoing organisations toward the goal of increasing individual and organisational effectiveness. " [French and Bell] This study describes and analyses the implementation of Organisation Development (OD) to an Anglican Church theological seminary, The College of the Transfiguration (Cott), in the Anglican Church of the Province of Southern Africa (ACSA). The origins of OD are business related, emerging in the late 1950s and early 1960s. Over the years, and recently in South Africa, OD has been applied in educational change initiatives. Unlike more traditional change strategies, OD promotes collaboration in organisational change processes through the inclusive participation of all stakeholders. This study is unique in the sense that OD is applied to an Anglican Church theological institution in Southern Africa. The goal of theological institutions, particularly Cot!, is to "form, inform and transform" (Cot! Prospectus, 2011) those who feel called to ordained ministry. Personal experience in this practice has confirmed that organisational emphasis is placed more on product than process; on results rather than the leadership and management of the organisation. This study was an attempt to introduce a process of planned change to such an organisational context. OD was introduced to The College of the Transfiguration in the form of action research using the Survey Data Feedback (SDF) strategy. Data gathered was interpreted and analysed, followed by action planning and implementation of agreed plans. The process had a positive impact on both stakeholders and the organisation despite the challenges associated with the unpredictable world of organisations. Ultimately, I propose tentative recommendations which could help Cott and other educational institutions to achieve long-term improvement in organisational leadership and management.
- Full Text:
- Authors: Chinganga, Percy
- Date: 2013-08-08
- Subjects: College of the Transfiguration (Grahamstown, South Africa) Organizational change -- Church of England -- Africa, Southern Leadership -- Religious aspects -- Christianity -- Africa, Southern Church management -- Church of England -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1959 , http://hdl.handle.net/10962/d1008377
- Description: "Organisation development is a planned, systematic process in which applied behavioral science principles and practices are introduced into ongoing organisations toward the goal of increasing individual and organisational effectiveness. " [French and Bell] This study describes and analyses the implementation of Organisation Development (OD) to an Anglican Church theological seminary, The College of the Transfiguration (Cott), in the Anglican Church of the Province of Southern Africa (ACSA). The origins of OD are business related, emerging in the late 1950s and early 1960s. Over the years, and recently in South Africa, OD has been applied in educational change initiatives. Unlike more traditional change strategies, OD promotes collaboration in organisational change processes through the inclusive participation of all stakeholders. This study is unique in the sense that OD is applied to an Anglican Church theological institution in Southern Africa. The goal of theological institutions, particularly Cot!, is to "form, inform and transform" (Cot! Prospectus, 2011) those who feel called to ordained ministry. Personal experience in this practice has confirmed that organisational emphasis is placed more on product than process; on results rather than the leadership and management of the organisation. This study was an attempt to introduce a process of planned change to such an organisational context. OD was introduced to The College of the Transfiguration in the form of action research using the Survey Data Feedback (SDF) strategy. Data gathered was interpreted and analysed, followed by action planning and implementation of agreed plans. The process had a positive impact on both stakeholders and the organisation despite the challenges associated with the unpredictable world of organisations. Ultimately, I propose tentative recommendations which could help Cott and other educational institutions to achieve long-term improvement in organisational leadership and management.
- Full Text:
A framework for successful SOA adoption in selected South African universities
- Authors: Jacobs, Carmen
- Date: 2013-07-26
- Subjects: System analysis -- Data processing , System design -- Data processing , Systems integration , Service-oriented architecture (Computer science) , Education, Higher -- Data processing
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:1153 , http://hdl.handle.net/10962/d1008366 , System analysis -- Data processing , System design -- Data processing , Systems integration , Service-oriented architecture (Computer science) , Education, Higher -- Data processing
- Description: The demand for systems i·ntegration has become more and more significant in higher education as institutions want systems that provide coherent information with data that is up to date and not redundant and can seamlessly support the end user experience. Institutions have become more reliant on information systems to support both administrative functions and those involved in teaching, learning and research, but because each department supports a diverse array of computing platforms and applications, it becomes very difficult to integrate these systems. SOA is classified as an innovative approach to integrating existing systems involving the use of independent services that can be accessed without knowledge of the underlying platform implementation. Unfortunately, the SOA initiative will not be success if it is not understood and used correctly by various applications and systems throughout the organisation. SOA introduces complexity and challenges in systems integration, acceptance, governance, data, development planning, security and external opportunities. If an organisation does not embrace or enable change in each of these areas, it is not ready for the adoption of SOA. This research investigates the systems integration challenge in selected South African universities and explores factors for SOA adoption. The framework for the adoption of SOA comprises seven factors, of which Systems Integration is the most significant and represents an efficient starting point for institutions considering SOA adoption. Acceptance, Governance, Data, Development Planning, Security and External Opportunities are other factors of SOA adoption that require careful and thorough consideration before an institution can successfully adopt SOA. The results of this research emphasise the importance of being able to embrace change and innovation and modify strategies in order to reflect the constant changes required for the adoption of SOA. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Authors: Jacobs, Carmen
- Date: 2013-07-26
- Subjects: System analysis -- Data processing , System design -- Data processing , Systems integration , Service-oriented architecture (Computer science) , Education, Higher -- Data processing
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:1153 , http://hdl.handle.net/10962/d1008366 , System analysis -- Data processing , System design -- Data processing , Systems integration , Service-oriented architecture (Computer science) , Education, Higher -- Data processing
- Description: The demand for systems i·ntegration has become more and more significant in higher education as institutions want systems that provide coherent information with data that is up to date and not redundant and can seamlessly support the end user experience. Institutions have become more reliant on information systems to support both administrative functions and those involved in teaching, learning and research, but because each department supports a diverse array of computing platforms and applications, it becomes very difficult to integrate these systems. SOA is classified as an innovative approach to integrating existing systems involving the use of independent services that can be accessed without knowledge of the underlying platform implementation. Unfortunately, the SOA initiative will not be success if it is not understood and used correctly by various applications and systems throughout the organisation. SOA introduces complexity and challenges in systems integration, acceptance, governance, data, development planning, security and external opportunities. If an organisation does not embrace or enable change in each of these areas, it is not ready for the adoption of SOA. This research investigates the systems integration challenge in selected South African universities and explores factors for SOA adoption. The framework for the adoption of SOA comprises seven factors, of which Systems Integration is the most significant and represents an efficient starting point for institutions considering SOA adoption. Acceptance, Governance, Data, Development Planning, Security and External Opportunities are other factors of SOA adoption that require careful and thorough consideration before an institution can successfully adopt SOA. The results of this research emphasise the importance of being able to embrace change and innovation and modify strategies in order to reflect the constant changes required for the adoption of SOA. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
Synthesis and evaluation of novel inhibitors of 1-Deoxy-D-xylolose-5-phosphate reductoisomerase as potential antimalarials
- Authors: Conibear, Anne Claire
- Date: 2013-07-19
- Subjects: Antimalarials -- Development , Malaria -- Chemotherapy , Drug development , Enzyme kinetics , Phosphate esters
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4451 , http://hdl.handle.net/10962/d1008282 , Antimalarials -- Development , Malaria -- Chemotherapy , Drug development , Enzyme kinetics , Phosphate esters
- Description: Malaria continues to be an enormous health-threat in the developing world and the emergence of drug resistance has further compounded the problem. The parasite-specific enzyme, 1-deoxY-D-xylulose-S-phosphate reductoisomerase (DXR), has recently been validated as a promising antimalarial drug target. The present study comprises a combination of synthetic, physical organic, computer modelling and bioassay techniques directed towards the development of novel DXR inhibitors. A range of 2-heteroarylamino-2-oxoethyl- and 2- heteroarylamino-2-oxopropyl phosphonate esters and their corresponding phosphonic acid salts have been synthesised as analogues of the highly active DXR inhibitor, fosmidomycin. Treatment of the heteroarylamino precursors with chloroacetyl chloride or chloropropionyl chloride afforded chloroamide intermediates, Arbuzov reactions of which led to the corresponding diethyl phosphonate esters. Hydrolysis of the esters has been effected using bromotrimethylsilane. Twenty-four new compounds have been prepared and fully characterised using elemental (HRMS or combustion) and spectroscopic (1- and 2-D NMR and IR) analysis. A 31p NMR kinetic study has been carried out on the two-step silylation reaction involved in the hydrolysis of the phosphonate esters and has provided activation parameters for the reaction. The kinetic analysis was refined using a computational method to give an improved fit with the experimental data. Saturation transfer difference (STD) NMR analysis, computer-simulated docking and enzyme inhibition assays have been used to evaluate the enzyme-binding and -inhibition potential of the synthesised ligands. Minimal to moderate inhibitory activity has been observed and several structure-activity relationships have been identified. In silica exploration of the DXR active site has revealed an additional binding pocket and information on the topology of the active site has led to the de novo design of a new series of potential ligands. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Authors: Conibear, Anne Claire
- Date: 2013-07-19
- Subjects: Antimalarials -- Development , Malaria -- Chemotherapy , Drug development , Enzyme kinetics , Phosphate esters
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4451 , http://hdl.handle.net/10962/d1008282 , Antimalarials -- Development , Malaria -- Chemotherapy , Drug development , Enzyme kinetics , Phosphate esters
- Description: Malaria continues to be an enormous health-threat in the developing world and the emergence of drug resistance has further compounded the problem. The parasite-specific enzyme, 1-deoxY-D-xylulose-S-phosphate reductoisomerase (DXR), has recently been validated as a promising antimalarial drug target. The present study comprises a combination of synthetic, physical organic, computer modelling and bioassay techniques directed towards the development of novel DXR inhibitors. A range of 2-heteroarylamino-2-oxoethyl- and 2- heteroarylamino-2-oxopropyl phosphonate esters and their corresponding phosphonic acid salts have been synthesised as analogues of the highly active DXR inhibitor, fosmidomycin. Treatment of the heteroarylamino precursors with chloroacetyl chloride or chloropropionyl chloride afforded chloroamide intermediates, Arbuzov reactions of which led to the corresponding diethyl phosphonate esters. Hydrolysis of the esters has been effected using bromotrimethylsilane. Twenty-four new compounds have been prepared and fully characterised using elemental (HRMS or combustion) and spectroscopic (1- and 2-D NMR and IR) analysis. A 31p NMR kinetic study has been carried out on the two-step silylation reaction involved in the hydrolysis of the phosphonate esters and has provided activation parameters for the reaction. The kinetic analysis was refined using a computational method to give an improved fit with the experimental data. Saturation transfer difference (STD) NMR analysis, computer-simulated docking and enzyme inhibition assays have been used to evaluate the enzyme-binding and -inhibition potential of the synthesised ligands. Minimal to moderate inhibitory activity has been observed and several structure-activity relationships have been identified. In silica exploration of the DXR active site has revealed an additional binding pocket and information on the topology of the active site has led to the de novo design of a new series of potential ligands. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
The nature of geometry instruction and observed learning-outcomes opportunities in Nigerian and South African high schools:
- Atebe, Humphrey U, SchÀfer, Marc
- Authors: Atebe, Humphrey U , Schäfer, Marc
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140919 , vital:37929 , DOI: 10.1080/10288457.2011.10740712
- Description: The purpose of this qualitative case study involving six secondary school teachers was to obtain insight into how geometry is taught in selected Nigerian and South African high schools. It also aimed, by making use of the van Hiele model of geometry instruction, to elucidate what possible learning opportunities observed instructional methods could offer learners in the subject. The sample comprised three mathematics teachers from Nigeria and three mathematics teachers from South Africa, all of whom were selected using purposive sampling techniques. Instructional activities in six geometry classrooms were recorded on videotape. The van Hiele learning phases provided the framework for data analysis. The findings of this study indicate that observed teaching methods in geometry classrooms in the participating schools offer learners scant opportunity to learn geometry.
- Full Text:
- Date Issued: 2013
- Authors: Atebe, Humphrey U , Schäfer, Marc
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140919 , vital:37929 , DOI: 10.1080/10288457.2011.10740712
- Description: The purpose of this qualitative case study involving six secondary school teachers was to obtain insight into how geometry is taught in selected Nigerian and South African high schools. It also aimed, by making use of the van Hiele model of geometry instruction, to elucidate what possible learning opportunities observed instructional methods could offer learners in the subject. The sample comprised three mathematics teachers from Nigeria and three mathematics teachers from South Africa, all of whom were selected using purposive sampling techniques. Instructional activities in six geometry classrooms were recorded on videotape. The van Hiele learning phases provided the framework for data analysis. The findings of this study indicate that observed teaching methods in geometry classrooms in the participating schools offer learners scant opportunity to learn geometry.
- Full Text:
- Date Issued: 2013
Detecting impacts of invasive non-native sharptooth catfish, Clarias gariepinus, within invaded and non-invaded rivers.
- Kadye, Wilbert T, Booth, Anthony J
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124100 , vital:35539 , https://doi.10.1007/s10531-012-0291-5
- Description: In aquatic ecosystems, impacts by invasive introduced fish can be likened to press disturbances that persistently influence communities. This study examined invasion disturbances by determining the relationship between non-native sharptooth catfish Clarias gariepinus and aquatic macroinvertebrates in the Eastern Cape, South Africa. A Multiple BeforeâAfter ControlâImpact (MBACI) experimental design was used to examine macroinvertebrate communities within two rivers: one with catfish and another one without catfish. Within the invaded river, macroinvertebrates showed little response to catfish presence, whereas predator exclusion appeared to benefit community structure. This suggests that the macroinvertebrate community within the invaded river was adapted to predation impact because of the dominance of resilient taxa, such as Hirudinea, Oligochaeta and Chironomidae that were abundant in the Impact treatment relative to the Control treatment. High macroinvertebrate diversity and richness that was observed in the Control treatment, which excluded the predator, relative to the Impact treatment suggests predator avoidance behaviour within the invaded river. By comparison, within the uninvaded river, catfish introduction into the Impact treatment plots indicated negative effects on macroinvertebrate community that was reflected by decrease in diversity, richness and biomass. A community level impact was also reflected in the multivariate analysis that indicated more variation in macroinvertebrate composition within the Impact treatment relative to the Control in the uninvaded river. Catfish impact within the uninvaded river suggests the dominance of vulnerable taxa, such as odonates that were less abundant in the Impact treatment plots after catfish introduction. From a disturbance perspective, this study revealed different macroinvertebrate responses to catfish impact, and suggests that within invaded habitats, macroinvertebrates were less responsive to catfish presence, whereas catfish introduction within uninvaded habitats demonstrated invasion impact that was shown by a decrease in the abundance of vulnerable taxa. The occurrence of non-native sharptooth catfish within many Eastern Cape rivers is a concern because of its predation impact and potential to influence trophic interrelationships, and efforts should be taken to protect uninvaded rivers, and, where possible, eradicate the invader.
- Full Text:
- Date Issued: 2012
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124100 , vital:35539 , https://doi.10.1007/s10531-012-0291-5
- Description: In aquatic ecosystems, impacts by invasive introduced fish can be likened to press disturbances that persistently influence communities. This study examined invasion disturbances by determining the relationship between non-native sharptooth catfish Clarias gariepinus and aquatic macroinvertebrates in the Eastern Cape, South Africa. A Multiple BeforeâAfter ControlâImpact (MBACI) experimental design was used to examine macroinvertebrate communities within two rivers: one with catfish and another one without catfish. Within the invaded river, macroinvertebrates showed little response to catfish presence, whereas predator exclusion appeared to benefit community structure. This suggests that the macroinvertebrate community within the invaded river was adapted to predation impact because of the dominance of resilient taxa, such as Hirudinea, Oligochaeta and Chironomidae that were abundant in the Impact treatment relative to the Control treatment. High macroinvertebrate diversity and richness that was observed in the Control treatment, which excluded the predator, relative to the Impact treatment suggests predator avoidance behaviour within the invaded river. By comparison, within the uninvaded river, catfish introduction into the Impact treatment plots indicated negative effects on macroinvertebrate community that was reflected by decrease in diversity, richness and biomass. A community level impact was also reflected in the multivariate analysis that indicated more variation in macroinvertebrate composition within the Impact treatment relative to the Control in the uninvaded river. Catfish impact within the uninvaded river suggests the dominance of vulnerable taxa, such as odonates that were less abundant in the Impact treatment plots after catfish introduction. From a disturbance perspective, this study revealed different macroinvertebrate responses to catfish impact, and suggests that within invaded habitats, macroinvertebrates were less responsive to catfish presence, whereas catfish introduction within uninvaded habitats demonstrated invasion impact that was shown by a decrease in the abundance of vulnerable taxa. The occurrence of non-native sharptooth catfish within many Eastern Cape rivers is a concern because of its predation impact and potential to influence trophic interrelationships, and efforts should be taken to protect uninvaded rivers, and, where possible, eradicate the invader.
- Full Text:
- Date Issued: 2012
Inter-seasonal persistence and size-structuring of two minnow species within headwater streams in the Eastern Cape, South Africa
- Kadye, Wilbert T, Booth, Anthony J
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124866 , vital:35705 , https://doi.10.1111/j.1439-0426.2012.02027.x
- Description: This study examined temporal variation in population dynamics and size structuring of two cyprinid minnows, Pseudobarbus afer and Barbus anoplus, in relation to their proximate physical habitats. Population estimates were determined using three-pass depletion sampling during both summer and winter. The habitats were characterised by seasonal variation in all physico-chemical conditions and spatial variation in substrata compositions. Whereas significant differences in population size were noted between seasons for B. anoplus, no differences were found between seasons for density and capture probability for either species. An increase in boulders was associated with increase in population size and density for P. afer; for B. anoplus, increased percentages of bedrock and bank vegetation were associated with an increase in population size and probability of capture, respectively. According to Canonical Correspondence Analysis, size structuring in P. afer was explained predominantly by seasonality, with smaller length classes associated with the seasonal variable of summer, while larger length classes were associated with pH that was higher in winter. By comparison, for B. anoplus, the habitat variables â bank vegetation and bedrock â accounted for much of the explained variance for size structuring. Recruitment appeared to be the major driver of size structuring for the two species; refugia, especially boulders and bank vegetation, also appeared to be important. Overall, the two species were adapted to the headwater streams that were generally variable in environmental conditions. Potential invasions by non-native invasive fishes that occur within the mainstream habitats threaten these two species. Efforts should continue to protect these minnows from such invasions by constructing barriers to upstream migration of non-native fishes into these headwater habitats.
- Full Text:
- Date Issued: 2012
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124866 , vital:35705 , https://doi.10.1111/j.1439-0426.2012.02027.x
- Description: This study examined temporal variation in population dynamics and size structuring of two cyprinid minnows, Pseudobarbus afer and Barbus anoplus, in relation to their proximate physical habitats. Population estimates were determined using three-pass depletion sampling during both summer and winter. The habitats were characterised by seasonal variation in all physico-chemical conditions and spatial variation in substrata compositions. Whereas significant differences in population size were noted between seasons for B. anoplus, no differences were found between seasons for density and capture probability for either species. An increase in boulders was associated with increase in population size and density for P. afer; for B. anoplus, increased percentages of bedrock and bank vegetation were associated with an increase in population size and probability of capture, respectively. According to Canonical Correspondence Analysis, size structuring in P. afer was explained predominantly by seasonality, with smaller length classes associated with the seasonal variable of summer, while larger length classes were associated with pH that was higher in winter. By comparison, for B. anoplus, the habitat variables â bank vegetation and bedrock â accounted for much of the explained variance for size structuring. Recruitment appeared to be the major driver of size structuring for the two species; refugia, especially boulders and bank vegetation, also appeared to be important. Overall, the two species were adapted to the headwater streams that were generally variable in environmental conditions. Potential invasions by non-native invasive fishes that occur within the mainstream habitats threaten these two species. Efforts should continue to protect these minnows from such invasions by constructing barriers to upstream migration of non-native fishes into these headwater habitats.
- Full Text:
- Date Issued: 2012
The nature and quality of the mathematical connections teachers make:
- Mhlolo, Michael K, SchÀfer, Marc, Venkat, Hamsa
- Authors: Mhlolo, Michael K , Schäfer, Marc , Venkat, Hamsa
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140893 , vital:37927 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC120887
- Description: Current reforms in mathematics education emphasise the need for pedagogy because it offers learners opportunities to develop their proficiency with complex high-level cognitive processes. One has always associated the ability to make mathematical connections, together with the teacher's role in teaching them, with deep mathematical understanding. This article examines the nature and quality of the mathematical connections that the teachers' representations of those connections enabled or constrained. The researchers made video recordings of four Grade 11 teachers as they taught a series of five lessons on algebra-related topics. The results showed that the teachers' representations of mathematical connections were either faulty or superficial in most cases. It compromised the learners' opportunities for making meaningful mathematical connections. The researchers concluded by suggesting that helping teachers to build their representation repertoires could increase the effectiveness of their instructional practices.
- Full Text:
- Date Issued: 2012
- Authors: Mhlolo, Michael K , Schäfer, Marc , Venkat, Hamsa
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140893 , vital:37927 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC120887
- Description: Current reforms in mathematics education emphasise the need for pedagogy because it offers learners opportunities to develop their proficiency with complex high-level cognitive processes. One has always associated the ability to make mathematical connections, together with the teacher's role in teaching them, with deep mathematical understanding. This article examines the nature and quality of the mathematical connections that the teachers' representations of those connections enabled or constrained. The researchers made video recordings of four Grade 11 teachers as they taught a series of five lessons on algebra-related topics. The results showed that the teachers' representations of mathematical connections were either faulty or superficial in most cases. It compromised the learners' opportunities for making meaningful mathematical connections. The researchers concluded by suggesting that helping teachers to build their representation repertoires could increase the effectiveness of their instructional practices.
- Full Text:
- Date Issued: 2012
Scoring an own goal? The Construction Workers 2010 World Cup Strike
- Authors: Cottle, Eddie
- Date: 2011-10-04
- Subjects: Labour disputes -- South Africa , Strikes and lockouts -- South Africa , Industrial relations -- South Africa
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/60018 , vital:27722
- Description: The nationwide strike by 70 000 construction workers between 8 and 15 July 2009 was unprecedented and significant in several respects. This was the first national strike on 2010 World Cup sites by South African construction workers and was therefore an historic event. A second key feature of the strike was the unity displayed by workers and trade unions within a sector organised by several trade unions. Engineering and building workers came out on strike, with the Building Construction & Allied Workers Union (BCAWU) and the National Union of Mineworkers (NUM) standing together as their representative organisations. A third feature of the strike was the widespread sympathy for it by the South African public and media. This was despite it potentially setting back progress with World Cup projects. Fourthly, the pressure placed upon the trade unions' negotiating team by the Ministry of Labour and the FIFA Local Organising Committee (LOC) proved lethal in undermining their, assisting in causing them to dilute their trade union demands and demobilising the national strike.
- Full Text:
- Date Issued: 2011-10-04
- Authors: Cottle, Eddie
- Date: 2011-10-04
- Subjects: Labour disputes -- South Africa , Strikes and lockouts -- South Africa , Industrial relations -- South Africa
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/60018 , vital:27722
- Description: The nationwide strike by 70 000 construction workers between 8 and 15 July 2009 was unprecedented and significant in several respects. This was the first national strike on 2010 World Cup sites by South African construction workers and was therefore an historic event. A second key feature of the strike was the unity displayed by workers and trade unions within a sector organised by several trade unions. Engineering and building workers came out on strike, with the Building Construction & Allied Workers Union (BCAWU) and the National Union of Mineworkers (NUM) standing together as their representative organisations. A third feature of the strike was the widespread sympathy for it by the South African public and media. This was despite it potentially setting back progress with World Cup projects. Fourthly, the pressure placed upon the trade unions' negotiating team by the Ministry of Labour and the FIFA Local Organising Committee (LOC) proved lethal in undermining their, assisting in causing them to dilute their trade union demands and demobilising the national strike.
- Full Text:
- Date Issued: 2011-10-04
"But what story?": a narrative-discursive analysis of "white" Afrikaners' accounts of male involvement in parenthood decision-making
- Authors: Morison, Tracy
- Date: 2011
- Subjects: Family planning -- South Africa -- Psychological aspects Family size Birth intervals Men -- South Africa -- Attitudes Men -- South Africa -- Psychology Couples -- South Africa -- Psychology Afrikaners -- Attitudes
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3025 , http://hdl.handle.net/10962/d1002534
- Description: Despite the increased focus on men in reproductive research, little is known about male involvement in the initial decision/s regarding parenthood (i.e., to become a parent or not) and the subsequent decision-making that may ensue (e.g., choices about timing or spacing of births). In particular, the parenthood decision-making of âWhiteâ, heterosexual men from the middle class has been understudied, as indicated in the existing literature. In South Africa, this oversight has been exacerbated by the tendency for researchers to concentrate on âproblematicâ men, to the exclusion of the âboring, normal caseâ. I argue that this silence in the literature is a result of the taken for granted nature of parenthood in the ânormalâ heterosexual life course. In this study, I have turned the spotlight onto the norm of âWhitenessâ and heterosexuality by studying those who have previously been overlooked by researchers. I focus on âWhiteâ Afrikaans menâs involvement in parenthood decision-making. My aim was to explore how constructions of gender inform male involvement in decision-making, especially within the South African context where social transformation has challenged traditional conceptions of male selfhood giving rise to new and contested masculine identities and new discourses of manhood and fatherhood. In an effort to ensure that womenâs voices are not marginalised in the research, as is often the case in studies of men and masculinity, I conducted in-depth, semi-structured interviews about male involvement in decision-making with both âWhiteâ Afrikaans women and men. There were 23 participants in total, who all identified as heterosexual and middle-class. The participants were divided into two age cohorts (21 â 30 years and >40 years), which were then differentiated according to gender, reproductive status, and relationship status. Treating the interviews as jointly produced narratives, I analysed them by means of a performativity/performance lens. This dual analytic lens focuses on how particular narrative performances are simultaneously shaped by the interview setting and the broader discursive context. The lens was fashioned by synthesising Butlerâs theory of performativity with Taylorâs narrative-discursive method. This synthesis (1) allows for Butlerâs notion of âperformativityâ to be supplemented with that of âperformanceâ; (2) provides a concrete analytical strategy in the form of positioning analysis; and (3) draws attention to both the micro politics of the interview conversation and the operation of power on the macro level, including the possibility of making âgender troubleâ. The findings of the study suggest that the participants experienced difficulty narrating about male involvement in parenthood decision-making, owing to the taken for granted nature of parenthood for heterosexual adults. This was evident in participantsâ sidelining of issues of âdecidingâ and âplanningâ and their alternate construal of childbearing as a non-choice, which, significantly served to bolster hetero-patriarchal norms. A central rhetorical tool for accomplishing these purposes was found in the construction of the âsacralisedâ child. In discursively manoeuvring around the central problematic, the participants ultimately produced a âsilenceâ in the data that repeats the one in the research literature.
- Full Text:
- Date Issued: 2011
- Authors: Morison, Tracy
- Date: 2011
- Subjects: Family planning -- South Africa -- Psychological aspects Family size Birth intervals Men -- South Africa -- Attitudes Men -- South Africa -- Psychology Couples -- South Africa -- Psychology Afrikaners -- Attitudes
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3025 , http://hdl.handle.net/10962/d1002534
- Description: Despite the increased focus on men in reproductive research, little is known about male involvement in the initial decision/s regarding parenthood (i.e., to become a parent or not) and the subsequent decision-making that may ensue (e.g., choices about timing or spacing of births). In particular, the parenthood decision-making of âWhiteâ, heterosexual men from the middle class has been understudied, as indicated in the existing literature. In South Africa, this oversight has been exacerbated by the tendency for researchers to concentrate on âproblematicâ men, to the exclusion of the âboring, normal caseâ. I argue that this silence in the literature is a result of the taken for granted nature of parenthood in the ânormalâ heterosexual life course. In this study, I have turned the spotlight onto the norm of âWhitenessâ and heterosexuality by studying those who have previously been overlooked by researchers. I focus on âWhiteâ Afrikaans menâs involvement in parenthood decision-making. My aim was to explore how constructions of gender inform male involvement in decision-making, especially within the South African context where social transformation has challenged traditional conceptions of male selfhood giving rise to new and contested masculine identities and new discourses of manhood and fatherhood. In an effort to ensure that womenâs voices are not marginalised in the research, as is often the case in studies of men and masculinity, I conducted in-depth, semi-structured interviews about male involvement in decision-making with both âWhiteâ Afrikaans women and men. There were 23 participants in total, who all identified as heterosexual and middle-class. The participants were divided into two age cohorts (21 â 30 years and >40 years), which were then differentiated according to gender, reproductive status, and relationship status. Treating the interviews as jointly produced narratives, I analysed them by means of a performativity/performance lens. This dual analytic lens focuses on how particular narrative performances are simultaneously shaped by the interview setting and the broader discursive context. The lens was fashioned by synthesising Butlerâs theory of performativity with Taylorâs narrative-discursive method. This synthesis (1) allows for Butlerâs notion of âperformativityâ to be supplemented with that of âperformanceâ; (2) provides a concrete analytical strategy in the form of positioning analysis; and (3) draws attention to both the micro politics of the interview conversation and the operation of power on the macro level, including the possibility of making âgender troubleâ. The findings of the study suggest that the participants experienced difficulty narrating about male involvement in parenthood decision-making, owing to the taken for granted nature of parenthood for heterosexual adults. This was evident in participantsâ sidelining of issues of âdecidingâ and âplanningâ and their alternate construal of childbearing as a non-choice, which, significantly served to bolster hetero-patriarchal norms. A central rhetorical tool for accomplishing these purposes was found in the construction of the âsacralisedâ child. In discursively manoeuvring around the central problematic, the participants ultimately produced a âsilenceâ in the data that repeats the one in the research literature.
- Full Text:
- Date Issued: 2011
"Nested" cryptic diversity in a widespread marine ecosystem engineer: a challenge for detecting biological invasions
- Teske, Peter R, Ruis, Marc, McQuaid, Christopher D, Styan, Craig A, Piggott, Maxine P, Benhissoune, SaĂŻd, Fuentes-GrĂŒnewald, Claudio, Walls, Kathy, Page, Mike, Attard, Catherine R M, Cooke, Georgina M, McClusky, Claire F, Banks, Sam C, Barker, Nigel P, Beheregaray, Luciano B
- Authors: Teske, Peter R , Ruis, Marc , McQuaid, Christopher D , Styan, Craig A , Piggott, Maxine P , Benhissoune, Saïd , Fuentes-Grünewald, Claudio , Walls, Kathy , Page, Mike , Attard, Catherine R M , Cooke, Georgina M , McClusky, Claire F , Banks, Sam C , Barker, Nigel P , Beheregaray, Luciano B
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/445529 , vital:74396 , https://doi.org/10.1186/1471-2148-11-176
- Description: Ecosystem engineers facilitate habitat formation and enhance biodiversity, but when they become invasive, they present a critical threat to native communities because they can drastically alter the receiving habitat. Management of such species thus needs to be a priority, but the poorly resolved taxonomy of many ecosystem engineers represents a major obstacle to correctly identifying them as being either native or introduced. We address this dilemma by studying the sea squirt Pyura stolonifera, an important ecosystem engineer that dominates coastal communities particularly in the southern hemisphere. Using DNA sequence data from four independently evolving loci, we aimed to determine levels of cryptic diversity, the invasive or native status of each regional population, and the most appropriate sampling design for identifying the geographic ranges of each evolutionary unit.
- Full Text:
- Date Issued: 2011
- Authors: Teske, Peter R , Ruis, Marc , McQuaid, Christopher D , Styan, Craig A , Piggott, Maxine P , Benhissoune, Saïd , Fuentes-Grünewald, Claudio , Walls, Kathy , Page, Mike , Attard, Catherine R M , Cooke, Georgina M , McClusky, Claire F , Banks, Sam C , Barker, Nigel P , Beheregaray, Luciano B
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/445529 , vital:74396 , https://doi.org/10.1186/1471-2148-11-176
- Description: Ecosystem engineers facilitate habitat formation and enhance biodiversity, but when they become invasive, they present a critical threat to native communities because they can drastically alter the receiving habitat. Management of such species thus needs to be a priority, but the poorly resolved taxonomy of many ecosystem engineers represents a major obstacle to correctly identifying them as being either native or introduced. We address this dilemma by studying the sea squirt Pyura stolonifera, an important ecosystem engineer that dominates coastal communities particularly in the southern hemisphere. Using DNA sequence data from four independently evolving loci, we aimed to determine levels of cryptic diversity, the invasive or native status of each regional population, and the most appropriate sampling design for identifying the geographic ranges of each evolutionary unit.
- Full Text:
- Date Issued: 2011
"On se DĂ©brouille": Congolese migrants' search for survival and success in Muizenberg, Cape Town
- Authors: Owen, Joy N
- Date: 2011
- Subjects: Foreign workers, Congolese -- Social aspects -- South Africa -- Muizenberg Social capital (Sociology) Immigrants -- Social networks -- South Africa -- Muizenberg South Africa -- Emigration and immigration -- Social aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2094 , http://hdl.handle.net/10962/d1002657
- Description: Situated in a Congolese transnational 'community' in Muizenberg, a suburb of Cape Town, South Africa, the thesis focuses on the lives of three middle class Congolese male informants. Their contingent acquaintance with a South African white Christian man gave them access to valuable social capital; social capital that positioned them advantageously to date and eventually marry European white women and thereby further their culturally-defmed economic/material career goals. To demonstrate the socio-economic trajectory of the three, I compare their social positioning with other Congolese men and women resident in Muizenberg. I show how these men and women, like my three main informants, activate their Congolese 'habitus' to secure access to social networks and the social capital therein. The difference between these Congolese men and women and my three main informants, however, is their strategic use of contingency, and the instrumental capitalisation of their cultural capital through the creation of a client-patron relationship with a South African in order to further their life goals. The thesis reorientates the migration literature on African migration from a focus on the implications of migrant remittances to the home country, to a focus on individual migrants' agency in the host country and the cultural influence of the society of origin. While I acknowledge that my research participants are part of a transnational social field, the focus on one locality and the relatively longitudinal approach of the study grounds the analysis both in the day-to-day lives of these migrants and in their migrant careers in and beyond Muizenberg and South Africa. With this orientation, the thesis is able to reveal that some Congolese migrants are comfortable to create a holding place for themselves in South Africa, while others - ever aware of the Congolese ambition to travel overseas - migrate beyond South African borders. For these Congolese migrants, South Africa is then a transit space. Fundamentally, all of my research participants give expression to Mobutu's edict of on se debrouille (literally, 'one fends for oneself), but some are more able to achieve the ultimate aspiration of settling in the First World -lola.
- Full Text:
- Date Issued: 2011
- Authors: Owen, Joy N
- Date: 2011
- Subjects: Foreign workers, Congolese -- Social aspects -- South Africa -- Muizenberg Social capital (Sociology) Immigrants -- Social networks -- South Africa -- Muizenberg South Africa -- Emigration and immigration -- Social aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2094 , http://hdl.handle.net/10962/d1002657
- Description: Situated in a Congolese transnational 'community' in Muizenberg, a suburb of Cape Town, South Africa, the thesis focuses on the lives of three middle class Congolese male informants. Their contingent acquaintance with a South African white Christian man gave them access to valuable social capital; social capital that positioned them advantageously to date and eventually marry European white women and thereby further their culturally-defmed economic/material career goals. To demonstrate the socio-economic trajectory of the three, I compare their social positioning with other Congolese men and women resident in Muizenberg. I show how these men and women, like my three main informants, activate their Congolese 'habitus' to secure access to social networks and the social capital therein. The difference between these Congolese men and women and my three main informants, however, is their strategic use of contingency, and the instrumental capitalisation of their cultural capital through the creation of a client-patron relationship with a South African in order to further their life goals. The thesis reorientates the migration literature on African migration from a focus on the implications of migrant remittances to the home country, to a focus on individual migrants' agency in the host country and the cultural influence of the society of origin. While I acknowledge that my research participants are part of a transnational social field, the focus on one locality and the relatively longitudinal approach of the study grounds the analysis both in the day-to-day lives of these migrants and in their migrant careers in and beyond Muizenberg and South Africa. With this orientation, the thesis is able to reveal that some Congolese migrants are comfortable to create a holding place for themselves in South Africa, while others - ever aware of the Congolese ambition to travel overseas - migrate beyond South African borders. For these Congolese migrants, South Africa is then a transit space. Fundamentally, all of my research participants give expression to Mobutu's edict of on se debrouille (literally, 'one fends for oneself), but some are more able to achieve the ultimate aspiration of settling in the First World -lola.
- Full Text:
- Date Issued: 2011
"Too tired to speak?": investigating the reception of Radio Grahamstown's Lunchtime Live show as a means of linking local communities to power
- Authors: Tsarwe, Stanley Zvinaiye
- Date: 2011
- Subjects: Community radio -- South Africa -- Grahamstown Radio broadcasting -- South Africa -- Grahamstown Radio journalism -- South Africa -- Grahamstown Mass media -- Political aspects -- South Africa -- Grahamstown Grahamstown (South Africa) -- Economic conditions -- 21st century Grahamstown (South Africa) -- Social conditions -- 21st century Civil society -- South Africa -- Grahamstown Political participation -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3488 , http://hdl.handle.net/10962/d1002943
- Description: This study sets out to investigate Lunchtime Live, a twice-weekly, one-hour long current affairs show broadcast on a small community radio station, Radio Grahamstown, to understand its role in the local public sphere, and its value in helping civil societyâs understanding of and involvement in the power structures and political activities in Grahamstown. Lunchtime Live seeks to cultivate a collective identity and promote public participation in the public affairs of Grahamstown. As a key avenue of investigation, this study seeks to test theory against practice, by evaluating Lunchtime Liveâs aspirations against the audiencesâ perception of it. This investigation uses qualitative content analysis of selected episodes of recorded transcripts of the shows that aired between August 2010 and March 2011, together with the audiencesâ verbalised experiences of this programme through focus group discussions. The study principally uses qualitative research informed by reception theory. The research reveals three key findings. First, that resonance rather than resistance is the more dominant âstanceâ or âattitudeâ towards the content of Lunchtime Live. Residents interviewed agreed that the programme is able to give a ârealisticâ representation of their worldview, and thus is able to articulate issues that affect their lives. Second, that whilst the programme is helping establish links between members of the civil society as well as between civil society and their political representatives, residents feel that local democracy is failing to bring qualitative improvements to their everyday lives and that more âparticipationâ is unlikely to change this. Most respondents blame this on a lack of political will, incompetence, corruption and populist rhetoric by politicians who fail to deliver on the mantra of âa better life for allâ in the socioeconomic sphere. The study finds a scepticism and even cynicism that participatory media seems to be able to do little to dilute. Thirdly, in spite of the largely positive view about Lunchtime Liveâs capacity to be a platform for public engagement, its participatory potential is structurally constrained by the material privations of most of its listeners. Given that in order to participate in talk shows and discussions audience members have to phone in, economic deprivation often precludes this. It is clear from this research that despite shows such as Lunchtime Live that are exploring new techniques of popular involvement, the voice of the ordinary people still struggles to be heard.
- Full Text:
- Date Issued: 2011
- Authors: Tsarwe, Stanley Zvinaiye
- Date: 2011
- Subjects: Community radio -- South Africa -- Grahamstown Radio broadcasting -- South Africa -- Grahamstown Radio journalism -- South Africa -- Grahamstown Mass media -- Political aspects -- South Africa -- Grahamstown Grahamstown (South Africa) -- Economic conditions -- 21st century Grahamstown (South Africa) -- Social conditions -- 21st century Civil society -- South Africa -- Grahamstown Political participation -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3488 , http://hdl.handle.net/10962/d1002943
- Description: This study sets out to investigate Lunchtime Live, a twice-weekly, one-hour long current affairs show broadcast on a small community radio station, Radio Grahamstown, to understand its role in the local public sphere, and its value in helping civil societyâs understanding of and involvement in the power structures and political activities in Grahamstown. Lunchtime Live seeks to cultivate a collective identity and promote public participation in the public affairs of Grahamstown. As a key avenue of investigation, this study seeks to test theory against practice, by evaluating Lunchtime Liveâs aspirations against the audiencesâ perception of it. This investigation uses qualitative content analysis of selected episodes of recorded transcripts of the shows that aired between August 2010 and March 2011, together with the audiencesâ verbalised experiences of this programme through focus group discussions. The study principally uses qualitative research informed by reception theory. The research reveals three key findings. First, that resonance rather than resistance is the more dominant âstanceâ or âattitudeâ towards the content of Lunchtime Live. Residents interviewed agreed that the programme is able to give a ârealisticâ representation of their worldview, and thus is able to articulate issues that affect their lives. Second, that whilst the programme is helping establish links between members of the civil society as well as between civil society and their political representatives, residents feel that local democracy is failing to bring qualitative improvements to their everyday lives and that more âparticipationâ is unlikely to change this. Most respondents blame this on a lack of political will, incompetence, corruption and populist rhetoric by politicians who fail to deliver on the mantra of âa better life for allâ in the socioeconomic sphere. The study finds a scepticism and even cynicism that participatory media seems to be able to do little to dilute. Thirdly, in spite of the largely positive view about Lunchtime Liveâs capacity to be a platform for public engagement, its participatory potential is structurally constrained by the material privations of most of its listeners. Given that in order to participate in talk shows and discussions audience members have to phone in, economic deprivation often precludes this. It is clear from this research that despite shows such as Lunchtime Live that are exploring new techniques of popular involvement, the voice of the ordinary people still struggles to be heard.
- Full Text:
- Date Issued: 2011
'Amanuensis' and 'Steatopygia': the complexity of 'Telling the Tale 'in Zoë Wicomb's David's Story
- Authors: Dass, Minesh
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142599 , vital:38094 , http://dx.doi.org/10.4314/eia.v38i2.3
- Description: Two words, 'amanuensis' and 'steatopygia,' each burdened with its own history, appear in Zoë Wicomb's David's Story with a frequency that commands further consideration. This study shows that these two words are in fact narratives which reveal the tension, inherent in all historical narratives, between that which is denotative or factual and that which is connotative or fictional. Similarly, the words also form the shifting horizon from which we may see history as a narrative of the past that is always also a narrative of the present. The link between these words will ultimately show the complex, compromised role of the narrator and, perhaps, of all historians.
- Full Text:
- Date Issued: 2011
- Authors: Dass, Minesh
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142599 , vital:38094 , http://dx.doi.org/10.4314/eia.v38i2.3
- Description: Two words, 'amanuensis' and 'steatopygia,' each burdened with its own history, appear in Zoë Wicomb's David's Story with a frequency that commands further consideration. This study shows that these two words are in fact narratives which reveal the tension, inherent in all historical narratives, between that which is denotative or factual and that which is connotative or fictional. Similarly, the words also form the shifting horizon from which we may see history as a narrative of the past that is always also a narrative of the present. The link between these words will ultimately show the complex, compromised role of the narrator and, perhaps, of all historians.
- Full Text:
- Date Issued: 2011
'Carrying the fire' : Cormac McCarthy's moral philosophy
- Authors: Davies, Christopher
- Date: 2011
- Subjects: McCarthy, Cormac, 1933- -- Criticism and interpretation American fiction -- 20th century -- Moral and ethical aspects American fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2217 , http://hdl.handle.net/10962/d1002260
- Description: In this thesis, I argue that the question of ethics, despite claims to the contrary, is a central concern in Cormac McCarthyâs fiction. My principal contention, in this regard, is that an approach that is not reliant on conventional systems of meaning is needed if one is to engage effectively with the moral value of this writerâs oeuvre. In devising such an approach, I draw heavily on the âimmoralistâ writings of Friedrich Nietzsche. The first chapter of the study contends that good and evil, terms central to conventional morality, do not occupy easily definable positions in McCarthyâs work. In the second chapter, the emphasis falls on the way in which language and mythâs mediation of reality informs choice. The final chapter focuses on the post-apocalyptic setting of The Road, in which normative systems of value are completely absent. It argues that, despite this absence, McCarthy presents a compassionate ethic that is able to find purchase in the harsh world depicted in the novel. Finally, then, this study argues that McCarthyâs latest novel, The Road, requires a reconsideration of the critical claim that his work is nihilistic and that it negates moral value.
- Full Text:
- Date Issued: 2011
- Authors: Davies, Christopher
- Date: 2011
- Subjects: McCarthy, Cormac, 1933- -- Criticism and interpretation American fiction -- 20th century -- Moral and ethical aspects American fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2217 , http://hdl.handle.net/10962/d1002260
- Description: In this thesis, I argue that the question of ethics, despite claims to the contrary, is a central concern in Cormac McCarthyâs fiction. My principal contention, in this regard, is that an approach that is not reliant on conventional systems of meaning is needed if one is to engage effectively with the moral value of this writerâs oeuvre. In devising such an approach, I draw heavily on the âimmoralistâ writings of Friedrich Nietzsche. The first chapter of the study contends that good and evil, terms central to conventional morality, do not occupy easily definable positions in McCarthyâs work. In the second chapter, the emphasis falls on the way in which language and mythâs mediation of reality informs choice. The final chapter focuses on the post-apocalyptic setting of The Road, in which normative systems of value are completely absent. It argues that, despite this absence, McCarthy presents a compassionate ethic that is able to find purchase in the harsh world depicted in the novel. Finally, then, this study argues that McCarthyâs latest novel, The Road, requires a reconsideration of the critical claim that his work is nihilistic and that it negates moral value.
- Full Text:
- Date Issued: 2011
'I want to tell the story again': re-telling in selected novels by Jeanette Winterson and Alan Warner
- Authors: Collett, Jenna Lara
- Date: 2011
- Subjects: Warner, Alan Criticism and interpretation Winterson, Jeanette, 1959- -- Criticism and interpretation English fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2248 , http://hdl.handle.net/10962/d1002291
- Description: This thesis investigates acts of âre-tellingâ in four selected novels by Jeanette Winterson and Alan Warner.Re-telling, as I have defined it, refers to the re-imagining and re-writing of existing narratives from mythology, fairy tale, and folktale, as well as the re-visioning of scientific discourses and historiography. I argue that this re-telling is representative of a contemporary cultural phenomenon, and is evidence of a postmodern genre that some literary theorists have termed re-visionary fiction. Despite the prevalent re-telling of canonical stories throughout literary history, there is much evidence for the emergence of a specifically contemporary trend of re-visionary literature. Part One of this thesis comprises two chapters which deal with Wintersonâs Sexing the Cherry (1989) and Weight (2005) respectively. In these chapters, I argue that, although the feminist and historiographic elements of her work are significant, there exist further motivations for Wintersonâs acts of re-telling in both Sexing the Cherry and Weight. In Chapter One, I analyse Wintersonâs subversion and re-imagining of historiography, as well as her re-telling of fairy tale, in Sexing the Cherry. Chapter Two provides a discussion of Wintersonâs re-telling of the myth of Atlas from Greek mythology, in which she draws on the discourses of science, technology, and autobiography, in Weight. Part Two focuses on Warnerâs first two novels, Morvern Callar (1995) and These Demented Lands (1997). In both novels, Warner re-imagines aspects of Christian, Celtic and pagan mythology in order to debunk the validity of biblical archetypes and narratives in a contemporary working-class setting, as well as to endow his protagonist with goddess-like or mythical sensibilities. Chapter Three deals predominantly with Warnerâs use of language, which I argue is central to his blending of mythological and contemporary content, while Chapter Four analyses his use of myth in these two novels. This thesis argues that while both Winterson and Warner share many of the aims associated with contemporary re-visionary fiction, their novels also exceed the boundaries of the genre in various ways. Winterson and Warner may, therefore, represent a new class of re-visionary writers, whose aim is not solely to subvert the pre-text but to draw on its generic discourses and thematic conventions in order to demonstrate the generic and discursive possibilities inherent in the act of re-telling.
- Full Text:
- Date Issued: 2011
- Authors: Collett, Jenna Lara
- Date: 2011
- Subjects: Warner, Alan Criticism and interpretation Winterson, Jeanette, 1959- -- Criticism and interpretation English fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2248 , http://hdl.handle.net/10962/d1002291
- Description: This thesis investigates acts of âre-tellingâ in four selected novels by Jeanette Winterson and Alan Warner.Re-telling, as I have defined it, refers to the re-imagining and re-writing of existing narratives from mythology, fairy tale, and folktale, as well as the re-visioning of scientific discourses and historiography. I argue that this re-telling is representative of a contemporary cultural phenomenon, and is evidence of a postmodern genre that some literary theorists have termed re-visionary fiction. Despite the prevalent re-telling of canonical stories throughout literary history, there is much evidence for the emergence of a specifically contemporary trend of re-visionary literature. Part One of this thesis comprises two chapters which deal with Wintersonâs Sexing the Cherry (1989) and Weight (2005) respectively. In these chapters, I argue that, although the feminist and historiographic elements of her work are significant, there exist further motivations for Wintersonâs acts of re-telling in both Sexing the Cherry and Weight. In Chapter One, I analyse Wintersonâs subversion and re-imagining of historiography, as well as her re-telling of fairy tale, in Sexing the Cherry. Chapter Two provides a discussion of Wintersonâs re-telling of the myth of Atlas from Greek mythology, in which she draws on the discourses of science, technology, and autobiography, in Weight. Part Two focuses on Warnerâs first two novels, Morvern Callar (1995) and These Demented Lands (1997). In both novels, Warner re-imagines aspects of Christian, Celtic and pagan mythology in order to debunk the validity of biblical archetypes and narratives in a contemporary working-class setting, as well as to endow his protagonist with goddess-like or mythical sensibilities. Chapter Three deals predominantly with Warnerâs use of language, which I argue is central to his blending of mythological and contemporary content, while Chapter Four analyses his use of myth in these two novels. This thesis argues that while both Winterson and Warner share many of the aims associated with contemporary re-visionary fiction, their novels also exceed the boundaries of the genre in various ways. Winterson and Warner may, therefore, represent a new class of re-visionary writers, whose aim is not solely to subvert the pre-text but to draw on its generic discourses and thematic conventions in order to demonstrate the generic and discursive possibilities inherent in the act of re-telling.
- Full Text:
- Date Issued: 2011
'Iron on iron': modernism engaging apartheid in some South African railway poems
- Authors: Wright, Laurence
- Date: 2011
- Language: English
- Type: text , article
- Identifier: vital:7068 , http://hdl.handle.net/10962/d1007459 , https://doi.org/10.1080/00138398.2011.626177
- Description: preprint , Modernism tends to be criticised, internationally, as politically conservative. The objection is often valid, although the charge says little about the quality of artistic achievement involved. This article argues that the alliance between Modernism and political conservatism is by no means a necessary one, and that there are instances where modernist vision has been used to convey substantive political insight, effective social critique and solid resistance. To illustrate the contrast,the article juxtaposes the abstract Modernism associated with Ben Nicholson and World War 2, with a neglected strain of South African railway poetry which uses modernist techniques to effect a powerful critique of South Africaâs apartheid dispensation. The article sustains a distinction between universalising modernist art that requires ethical work from its audiences to achieve artistic completion, and art in which modernist vision performs the requisite ethical work within its own formal constraints. Four very different South African railway poems, by Dennis Brutus, John Hendrickse, Alan Paton, and Leonard Koza, are examined and contextualised to demonstrate ways in which a modernist vision has been used to portray the social disruptions caused by apartheid. Modernist techniques are used to turn railway experience into a metonym for massive social disruption,without betraying the social reality of the transport technology involved.
- Full Text:
- Date Issued: 2011
- Authors: Wright, Laurence
- Date: 2011
- Language: English
- Type: text , article
- Identifier: vital:7068 , http://hdl.handle.net/10962/d1007459 , https://doi.org/10.1080/00138398.2011.626177
- Description: preprint , Modernism tends to be criticised, internationally, as politically conservative. The objection is often valid, although the charge says little about the quality of artistic achievement involved. This article argues that the alliance between Modernism and political conservatism is by no means a necessary one, and that there are instances where modernist vision has been used to convey substantive political insight, effective social critique and solid resistance. To illustrate the contrast,the article juxtaposes the abstract Modernism associated with Ben Nicholson and World War 2, with a neglected strain of South African railway poetry which uses modernist techniques to effect a powerful critique of South Africaâs apartheid dispensation. The article sustains a distinction between universalising modernist art that requires ethical work from its audiences to achieve artistic completion, and art in which modernist vision performs the requisite ethical work within its own formal constraints. Four very different South African railway poems, by Dennis Brutus, John Hendrickse, Alan Paton, and Leonard Koza, are examined and contextualised to demonstrate ways in which a modernist vision has been used to portray the social disruptions caused by apartheid. Modernist techniques are used to turn railway experience into a metonym for massive social disruption,without betraying the social reality of the transport technology involved.
- Full Text:
- Date Issued: 2011