List of Titles

Recovery of the critically endangered river pipefish, Syngnathus watermeyeri, in the Kariega Estuary, Eastern Cape province

- Vorwerk, Paul D, Froneman, P William, Paterson, Angus W

Authors: Vorwerk, Paul D , Froneman, P William , Paterson, Angus W
Date: 2007
Language: English
Type: text , Article
Identifier: vital:6965 , http://hdl.handle.net/10962/d1012028
Description: An intensive ichthyofaunal survey in the permanently open Kariega Estuary along the Eastern Cape coast has identified a breeding population of the critically endangered river pipefish, Syngnathus watermeyeri, within the middle and upper reaches of the system. This is the first recorded capture of this species in the estuary for over four decades. We suggest that the presence of S. watermeyeri is the result of the heavy rainfall within the region, which contributed to the establishment of optimum habitat requirements (mesohaline conditions and increased food availability) of the pipefish.
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Reflecting on the 2007 World Environmental Education Congress

- Lotz-Sisitka, Heila

Authors: Lotz-Sisitka, Heila
Date: 2007
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/183047 , vital:43907 , xlink:href="https://doi.org/10.1177/097340820700100207"
Description: What motivates more than 800 people from 101 countries around the world to meet at a World Environmental Education Congress? And how does one make the most of such an incredible gathering of people, cultures, thoughts and minds? What did people learn and was it worthwhile? These are just some of the questions that have been chasing through my mind in the weeks following the fourth World Environmental Education Congress held in Durban, South Africa, in July 2007. This short paper shares some preliminary reflections on the 2007 WEEC event, noting that in-depth analyses will only become possible as time passes.
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Reflective (a)musings on 16 kinds of emptiness…: re-framing research for practice

- Finestone-Praeg, Juanita

Authors: Finestone-Praeg, Juanita
Date: 2007
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/468584 , vital:77092 , https://doi.org/10.1080/10137548.2007.9687863
Description: This paper would like to offer a personal account of my experiences as a practitioner coming to question notions of research through my involvement with the practice as research initiative in South Africa. This PaR project was a national initiative set up by university drama departments in consultation with the NRF (National Research Foundation in South Africa) to conduct a pilot project of peer review for live performance. The first of its kind in South Africa, this call for case studies seemed to present a unique opportunity to engage actively, and with some agency, towards shifting the status and perception of research in the performing arts within the academy and the profession. It also presented a space within which to experiment and extend my own understandings of practice as research. 16 kinds of emptiness… became one of the 6 pilot projects selected for this peer review process.
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Regulation of hyu gene expression in Agrobacterium tumefaciens strains RU-AE01 and RU-OR

- Jiwaji, Meesbah

Authors: Jiwaji, Meesbah
Date: 2007
Subjects: Agrobacterium tumefaciens Amino acids Gene expression Hydrolysis Hydantoin Enzymes
Language: English
Type: Thesis , Doctoral , PhD
Identifier: vital:3983 , http://hdl.handle.net/10962/d1004042
Description: Several Agrobacterium tumefaciens strains have been isolated for their ability to produce D-amino acids from D, L-substituted hydantoins. The optically pure D-amino acids are used in the synthesis of pharmaceuticals, as food additives and as insecticides. This hydrolysis of D, L-substituted hydantoins is catalysed by two hydantoin-hydrolyzing enzymes, an hydantoinase and an N-carbamyl amino acid amidohydrolase. While the hydantoin-hydrolyzing enzymes have been studied in detail, the mechanisms that control expression of the hyu genes have not. The research reported in this work elucidates some of the mechanisms involved in the regulation of the hyu genes in A. tumefaciens strains. The hydantoin-hydrolyzing enzyme activity from the environmental isolate A. tumefaciens RU-AE01 was characterized. A broad host range vector for the simultaneous analysis of divergent promoters was constructed. The promoter regions responsible for the activation of transcription of hyuH and hyuC were identified by deletion analysis. It was proposed that transcription of hyuH was activated by a putative σ[superscript 54]-dependent promoter or a putative σ[superscript 70]-dependent promoter identified upstream of the hyuH gene. The hyuC gene was activated by a putative σ[superscript 70]-dependent promoter identified upstream of the hyuC gene. The regulation of hydantoinase and N-carbamyl amino acid amidohydrolase enzyme activity was compared to the regulation of transcription from the RU-AE01 hyuH-hyuC region. Expression of the hydantoin-hydrolyzing enzymes was regulated by induction which correlated with reporter enzyme expression from the hyuH and hyuC promoter regions. However, the expression of the hydantoin-hydrolyzing enzymes was also regulated by nitrogen catabolite repression (NCR). This did not correlate to the reporter gene expression of the hyuH promoter region but did compare to the reporter gene expression of the hyuC promoter region. This suggested that NCR of hyuH was at the post-translational level whereas NCR of the hyuC promoter was at the transcriptional level. Pathways involved in the regulation of the hyu genes were characterized. The production of the hydantoin-hydrolyzing enzymes in both A. tumefaciens strains RU-AE01 and RU-OR were regulated by proteins involved in the global ntr pathway. The levels of the hydantoin-hydrolyzing enzymes in strain RU-AE01 were elevated in the presence of increased levels of NtrB and NtrC illustrating the importance of the ntr pathway in the regulation of the levels of the hydantoin-hydrolyzing enzymes. Similarly, in RU-OR the presence of exogenous NtrB and NtrC elevated levels of N-carbamyl amino acid amidohydrolase activity. However, the levels of hydantoinase enzyme activity in strain RU-OR were elevated in the presence of NtrC alone. In addition, the presence of a His6-tagged NtrC molecule abolished the elevation in the levels of the hydantoinase but not the N-carbamyl amino acid amidohydrolase enzyme activity in strain RU-OR. This suggests that NtrC has a direct role in the regulation of the expression of hyuH in RU-OR. In addition, it indicates that the hyu genes in the two A. tumefaciens strains RU-AE01 and RU-OR are different. The presence of the RU-AE01 hyuH-hyuC fragment caused a dramatic increase in the hydantoin-hydrolyzing enzyme activity in strain RU-OR but not strain RU-AE01. This implied the incidence of a possible repressor protein in RU-OR, which is titrated out by the presence of the RU-AE01 hyuH-hyuC fragment. Protein-DNA binding assays suggest that this putative repressor may be 38 kDa in RU-OR cells.
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Relating indigenous knowledge practices and science concepts : an exploratory case study in a secondary school teacher-training programme

- Mandikonza, Caleb

Authors: Mandikonza, Caleb
Date: 2007
Subjects: Ethnoscience -- Study and teaching (Secondary) -- Zimbabwe Science -- Study and teaching (Secondary) -- Zimbabwe Teachers -- Training of -- Zimbabwe
Language: English
Type: Thesis , Masters , MEd
Identifier: vital:1918 , http://hdl.handle.net/10962/d1007321
Description: This study reports research on how student teachers in Science at Mutare Teachers' College in Zimbabwe worked with indigenous knowledge practices in relation to science concepts in the secondary school syllabus. The study was conducted among first-year science students and involved them in developing science learning activities for a peer-teaching process that was part of their course. The research was undertaken during a review ofthe college syllabus and as a study to inform the Secondary Teacher Training Environmental Education Programme (ST²EEP). The research design involved the researcher in participant observations and interviews with rural people to document indigenous knowledge practices and to develop materials for the students to work with in the lessons design part of the study. The student teachers used the documented practices to generate learning activities and lesson plans to teach the science concepts they had identified. A peer review session and focus group interviews followed the lesson presentations. Findings from the research point to the rural community being a repository of diverse indigenous knowledge practices. Student teachers showed that they had prior knowledge of both indigenous knowledge practices and science concepts when they come to class. Student teachers were able to relate indigenous knowledge practices and science concepts in ways that have the potential to enhance the learning of science in rural school contexts that lack laboratories and science equipment. The scope of the study does not allow for anything beyond tentative conclusions that point to the need for further work to be undertaken with student teachers and for the research to be extended to teaching and learning interactions in schools. Recommendations are also made for further resource-based work to be undertaken within the forthcoming St²eep implementation phase in 2007.
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Report of the multidisciplinary investigation of differentiation and potential hybridisation between two Yellowfish species Labeobarbus Kimberleyensis and L. Aeneus from the Orange-Vaal system

- Bloomer, Paulette, Villet, Martin H, Bills, Ian R, Van der Bank, F Herman, Jones, Nick, Walsh, Gina

Authors: Bloomer, Paulette , Villet, Martin H , Bills, Ian R , Van der Bank, F Herman , Jones, Nick , Walsh, Gina
Date: 2007
Language: English
Type: Report
Identifier: vital:7162 , http://hdl.handle.net/10962/d1011937
Description: From the executive summary]: The relationships within and between two yellowfish species, Labeobarbus aeneus (smallmouth yellowfish) and L. kimberleyensis (largemouth yellowfish) from the Orange-Vaal system were investigated through three independently conducted studies of the same material collected from the Sak River (the type locality of L. aeneus), the upper Orange River at Aliwal North and the lower Orange River at Pella and Onseepkans.
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Resistance or tolerance: an examination of aphid (Sitobion yakini) phloem feeding on Betta and Betta-Dn wheat (Triticum aestivum)

- De Wet, L R, Botha, Christiaan E J

Authors: De Wet, L R , Botha, Christiaan E J
Date: 2007
Language: English
Type: Article
Identifier: vital:6517 , http://hdl.handle.net/10962/d1005945
Description: Engineering pest resistance into crops is important. However, the mechanisms of resistance are not clearly understood. In this study, we examined the effects of aphid feeding on Russian wheat aphid-resistant and -susceptible cultivars of wheat (Triticum aestivum L.); Betta-Dn and Betta, respectively, by the grass aphid, Sitobion yakini (Eastop). These cultivars were grown with or without aphid colonies. In each case, we examined the plants specifically for the formation of wound callose associated with the phloem, using aniline blue and fluorescence microscopy. We observed that aphid feeding stimulated the formation of wound callose in the susceptible cultivar, but that callose was comparatively reduced in the resistant cultivar of wheat. In a separate series of experiments, the xenobiotic, 5, 6-carboxyfluorescein diacetate was applied to attached sink leaves, distal to feeding aphids. When leaf segments were examined four hours after application, little evidence of phloem transport of the fluorescent cleavage product, 5, 6-carboxyfluorescein (5, 6-CF), was evident below known aphid-probed sieve tubes. Low levels or absence of 5, 6-CF indicates that either the aphids have successfully redirected sap to themselves, or that the phloem is no longer functional. In contrast, 5, 6-CF transport was evident below sites of aphid probing in Betta-Dn, suggesting that the phloem was still capable of long-distance transport. In addition, callose deposition was reduced in Betta-Dn leaf phloem and it is surmised that transport was not as affected by aphid feeding in the resistant cultivar. This indicates that the ‘resistant’ wheat cultivar may in fact be tolerant to aphid feeding by successfully overcoming the nutrient drain that feeding aphids imposed on the phloem transport system.
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Reviewing the use of environmental audits for environmental learning in school contexts: a case study of environmental auditing processes within a professional development course

- Hoffmann, Patricia Anne

Authors: Hoffmann, Patricia Anne
Date: 2007
Subjects: Environmental auditing -- Study and teaching -- South Africa -- Case studies Environmental education -- South Africa -- Case studies Sustainable development -- Study and teaching -- South Africa -- Case studies Professional education -- South Africa -- Case studies Teachers -- Training of -- South Africa -- Case studies Educational change -- South Africa -- Case studies
Language: English
Type: Thesis , Masters , MEd
Identifier: vital:1746 , http://hdl.handle.net/10962/d1003630
Description: This case study focuses on the use of environmental audits for learning, by teachers participating in the Schools and Sustainability professional development course in Durban, South Africa. It reviews ways in which audits were choreographed and used for lessons within school contexts. It explores ways in which audits shaped meaning-making interactions and environmental learning processes. This is an interpretive case study, characterized by a moderate realist perspective. Data were generated through interviews with teachers, field observations, photographs, document analysis, and group interviews with learners. Data were analyzed using the general comparative method. The research takes place in the context of educational transformation in South Africa. Some of the challenges accompanying the shift to Outcomes Based Education seem to be associated with naïve interpretations of constructivism and a view of reality as socially constructed and relative. This seems to have influenced ways in which audits are being undertaken in school contexts. This study argues that a realist orientation to auditing may be a more useful process for engaging with the world and enhancing the way learners perceive and respond to environmental risk. Ideas about reality-congruence and the interacting processes of involvement and detachment are of central importance in understanding processes of knowledge construction and meaning making in this study. The study draws on the work of Elias (1987) and Latour (1999) to shed light on the significance of auditing processes in which a close engagement with reality, coupled with a measure of detachment, can lead to the construction of a more reality-congruent account and a more realistic assessment of the environmental issue in focus. Key findings of the study suggest that the effectiveness of environmental auditing as a pedagogical process was influenced by the teachers’ intentions, knowledge and skills, choreography of the audit, nature of the teaching and learning interactions, and ways in which teachers and learners engaged with the findings. The study recommends that auditing activities should be carefully structured and mediated by teachers to be meaningful and to enable learners to identify environmental issues, gather data, engage in critical reflection and deliberate appropriate responses for social and environmental transformation.
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Rhodes University EE and Sustainability Unit

- Lotz-Sisitka, Heila, Schudel, Ingrid J

Authors: Lotz-Sisitka, Heila , Schudel, Ingrid J
Date: 2007
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/294423 , vital:57220 , xlink:href="https://doi.org/10.1177/097340820700100127"
Description: In the early 1990s, in response to the emphasis laid on environment and development issues by the new South African Constitution, Rhodes University undertook several initiatives such as establishing the first Chair of Environmental Education (EE) in Africa. Another important initiative was the introduction of an open-entry participatory course for environmental educators. Owing to its flexible format and practice-based methodology, the course gained rapid popularity, necessitating the setting up of a Service Centre to help meet the increased demand. The Chair and the Service Centre have been providing a range of short courses in environment and sustainability education to professionals, and are today widely known as the Rhodes University Environmental Education and Sustainability Unit (RUEESU). The Unit offers PhD and Masters level programmes in EE, encourages meaningful research in key thematic areas, and is actively involved in publishing, and policy transformation. It also endeavours to define the role of Universities in enabling sustainability education.
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Rhodes University Research Report 2007

- Rhodes University

Authors: Rhodes University
Date: 2007
Language: English
Type: Text
Identifier: vital:562 , http://hdl.handle.net/10962/d1011958
Description: [From Introduction] For the past 8 years Rhodes University has maintained a research output record (based on publications and Masters and PhD graduates) which has placed it consistently amongst the top three universities in the country on the basis of outputs per capita academic staff member. The past year was no exception. Journal publications were the highest to date (261.9 units) and Masters and PhD graduates (274 units) are amongst the highest achieved, largely due to the record number of PhD graduates (33) in the Science Faculty. In recent years this per capita output has consistently been over 60% higher than the national average. An encouraging aspect of the journal publications in 2007 is the increase in the percentage of articles in subsidy earning journals. While it is appreciated that the most appropriate journals in certain fields of research are not always those that are on the Department of Education’s approved lists, it is financially critical to the University’s research effort and the University as a whole that subsidy earning outputs are maximised. Another positive outcome of the most recent audit of Rhodes’s research outputs (2006; 2007 data will only be available at the end of 2008) is that 89% of the publications in the form of books, chapters and conference proceedings submitted to the Department of Education were approved for subsidy. This is a significantly higher percentage approval than in the past. The award of two highly prestigious NRF/DST Research Chairs to Profs Tebello Nyokong and Christopher McQuaid as part of the first round of the SA Research Chairs Initiative was another major achievement. These Chairs will significantly enhance the research profile and productivity of the University as will the recent award of the highly prestigious Centre of Excellence in Nanotechnology to be headed by Prof Nyokong. Only three such centres of excellence have been established and were officially launched by the Minister of Science and Technology in November 2007. The Centre will be host to researchers from throughout South Africa and will focus on novel technologies for cancer treatment and the development of new biosensors for disease treatment and water contamination. An encouraging statistic recently released by the National Research Foundation indicates that Rhodes has the fourth highest percentage (15.4%) of rated researchers in the country which is an excellent achievement. NRF ratings are awarded to researchers in all disciplines who are regarded as national and international leaders in their fields. Amongst these researchers, three were also recognised by the University and were awarded the Vice-Chancellor’s Research Awards (see highlights section). Postgraduate students have once again been the cornerstone of much of the research activities in all Faculties and have contributed significantly to the research outputs of the University both as co-authors on publications and through the good graduation rates of Masters and PhD candidates. This is particularly evident for example in the Science Faculty, in which Masters and Doctoral students contributed to over 90% of the Faculty and 60% of the University’s outputs. A key factor in the high profile and success of postgraduates at Rhodes is the excellent supervision they receive and all supervisors are to be congratulated for their dedicated approach to what has become an increasingly onerous academic responsibility. They and the Research Office have benefited enormously from the very able support of the Postgraduate Liaison Committee chaired for a second year by Dan Parker. The work of this committee is highly valued. Finally, this will be my last contribution to the annual Rhodes Research Reports as I will be retiring at the end of 2008. I would like to wish my successor with responsibility for Research at Rhodes, the new DVC: R&D Dr Peter Clayton, every success in the future which I am confident will see research at the University going from strength to strength. I would also like to take the opportunity to express my sincere and grateful thanks to all those who have supported me and contributed to the success of Rhodes research in my past 10 years as Dean of Research. This includes two Vice-Chancellors, members of Senior Management, Deans, Heads of Department and staff and postgraduate students in both academic departments and administrative divisions. In particular, a very big thank you to all the staff who have worked in the Research Office and have made such a significant contribution over this past decade. Special mention must be made of my first Assistant, Moira Pogrund, who was instrumental in the establishment and success of the Research Office from its inception in 1998. She gave true meaning to the word efficiency and her outstanding contribution is being continued by the excellent work of her successor, Dr Heather Davies-Coleman. John Gillam has been a tower of strength in the management and administration of postgraduate financial aid and has been an invaluable advisor and confidant to countless postgraduate students over this period.
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Role playing African development : an international comparison

- Fox, Roddy C, Assmo, P, Kjellgren, H

Authors: Fox, Roddy C , Assmo, P , Kjellgren, H
Date: 2007
Language: English
Type: Conference paper
Identifier: vital:6665 , http://hdl.handle.net/10962/d1006676
Description: The African Development Game is a role playing simulation developed to demonstrate the difficulties six African countries face in reaching the Millennium Development Goals. The game has been played in three different countries, South Africa, Sweden and Finland, to examine its utility as a learning tool for students who are unfamiliar both with the Millennium Development Goals and the problems of African development. Analysis of the games played in South Africa and Sweden. is based on a comparison of student reflections supplemented by participant observation and spreadsheet information of economic performances. Marked differences in the types of learning and success in repaying debt were observed between the two groups of students. They all commented, however, on the effectiveness of the role play as a learning tool.
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Roles : "I am as intently observed as the people photograph"

- Pelser, Monique Myren

Authors: Pelser, Monique Myren
Date: 2007
Subjects: Hugo, Pieter Portrait photography Self-portraits Photography, Artistic -- Philosophy
Language: English
Type: Thesis , Masters , MFA
Identifier: vital:2457 , http://hdl.handle.net/10962/d1007647
Description: With this dissertation I propose an investigation of how the photographic portrait attempts to construct and confirm identity through the representation of types. Drawing from theoretical texts by Roland Barthes and Robert Sobieszek and engaging with my own process of self-portraiture, as a means of troubling the usual power relations involved between the photographer and the sitter, I will demonstrate the dialectical nature of these roles involved in photographic portraiture. Looking at Pieter Hugo's portraits of judges in Botswana permits me to deal with issues of masquerade and how fashions and uniforms mask an individual allowing him/her to perform roles and stereotypes in society. Referring to another set of Hugo's images from his ongoing series Looking Aside, I will explore the paradoxical nature of the portrait through the dialectic of the 'self 'and 'other' subject and object split through an exploration of notions of skin and prosthetic skin and the relationship to the liminal space 'opened' between subject and object, or viewer and image.
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Satellite television use among Zimbabwean professionals : an investigation into audience consumption of SABC Africa's '60 Minutes live in Africa'

- Mugoni, Petronella Chipo

Authors: Mugoni, Petronella Chipo
Date: 2007
Subjects: Direct broadcast satellite television -- Zimbabwe Television viewers -- Zimbabwe Television viewers -- Zimbabwe -- Case studies Television broadcasting of news -- Zimbabwe
Language: English
Type: Thesis , Masters , MA
Identifier: vital:3512 , http://hdl.handle.net/10962/d1007707
Description: Within the context of debates surrounding the consumption of global media by local audiences in Third World countries, this study explores the reasons behind satellite television subscription, and consumption of international news among a sample of young professional men and women in contemporary Zimbabwe. The study seeks to uncover how the research participants respond to news broadcast on SABC Africa's '60 minutes live in Africa', a programme which they can only access via satellite television in their country. Working within the frame of audience studies which insists on understanding media consumption and reception in context, this study examines how the respondents, situated within the specific Zimbabwe context, characterised as it is by serious social, economic and political challenges, respond to both regional news and news about their country on '60 minutes live in Africa'. Within the frame of qualitative research the study employs a two-stage sampling procedure and data collection strategy to uncover the factors that underpin international media consumption and reception by professional men and women situated in a country undergoing rapid change. The findings of the study point to the various social and individual factors that underlie media consumption choices as well as to the different socially patterned reasons why local audiences are either attracted to, or reject global media. The study found that SABC Africa's '60 minutes live in Africa' is more popular and better received than Western-broadcast programmes on channels such as BBC, CNN, and Sky News among Zimbabwean professionals. I also uncovered some evidence that cultural proximity and relevance are of supreme importance in determining which media audiences chose to consume and what level of engagement they bring to their reception of global media. These and other findings directly confront media models that privilege beliefs in cultural imperialism and the dominance of Western media and their effects on Third World audiences.
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