Water chemistry and effect of evapotranspiration on chemical sedimentation on the Mkuze River floodplain, South Africa:
- Humphries, M S, Kindness, A, Ellery, William F N, Hughes, J C
- Authors: Humphries, M S , Kindness, A , Ellery, William F N , Hughes, J C
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144376 , vital:38340 , https://doi.org/10.1016/j.jaridenv.2011.01.013
- Description: The Mkuze Wetland System, forming part of the iSimangaliso World Heritage Site, is South Africa’s largest freshwater wetland area and is known to act as a sink for naturally occurring solutes within the landscape. The chemistry of groundwater and porewater samples, collected from two transects on the Mkuze River floodplain, was investigated to identify processes involved in the control of solute concentrations. Results show that solutes in the groundwater become increasingly concentrated under the influence of evapotranspiration, resulting in the saturation, precipitation, and accumulation of less soluble compounds.
- Full Text:
- Authors: Humphries, M S , Kindness, A , Ellery, William F N , Hughes, J C
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144376 , vital:38340 , https://doi.org/10.1016/j.jaridenv.2011.01.013
- Description: The Mkuze Wetland System, forming part of the iSimangaliso World Heritage Site, is South Africa’s largest freshwater wetland area and is known to act as a sink for naturally occurring solutes within the landscape. The chemistry of groundwater and porewater samples, collected from two transects on the Mkuze River floodplain, was investigated to identify processes involved in the control of solute concentrations. Results show that solutes in the groundwater become increasingly concentrated under the influence of evapotranspiration, resulting in the saturation, precipitation, and accumulation of less soluble compounds.
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Water-soluble quaternized mercaptopyridine-substituted zinc-phthalocyanines
- Durmuş, Mahmut, Yaman, Hanif, Göl, Cem, Ahsen, Vefa, Nyokong, Tebello
- Authors: Durmuş, Mahmut , Yaman, Hanif , Göl, Cem , Ahsen, Vefa , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247133 , vital:51549 , xlink:href="https://doi.org/10.1016/j.dyepig.2011.02.007"
- Description: The synthesis and characterization of the new zinc phthalocyanine derivatives, tetra- (non-peripheral, 5) and octa-(peripheral, 6) substituted with 2-mercaptopyridine and their respective quaternized derivatives (8 and 9) are reported. Photochemical and photophysical properties of the new complexes are compared with those of the previously reported peripherally tetra-substituted complexes 7 and 10. The quaternized compounds exhibit excellent solubility in water, making them potential photosensitizers for use in photodynamic therapy (PDT) of cancer. Spectroscopic, aggregation, photophysical and photochemical properties of these complexes are also investigated and compared. Photophysical (fluorescence quantum yields and lifetimes) and photochemical (singlet oxygen and photodegradation quantum yield) properties of these phthalocyanine photosensitizers are very important for the assessment of these complexes as PDT agents. In this study, the effects of the position of the substituents and quaternization of the substituents on the photophysical and photochemical parameters of the zinc phthalocyanines are also reported. This study also showed that the water-soluble quaternized zinc phthalocyanines strongly bind to blood plasma proteins such as bovine serum albumin (BSA).
- Full Text:
- Authors: Durmuş, Mahmut , Yaman, Hanif , Göl, Cem , Ahsen, Vefa , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247133 , vital:51549 , xlink:href="https://doi.org/10.1016/j.dyepig.2011.02.007"
- Description: The synthesis and characterization of the new zinc phthalocyanine derivatives, tetra- (non-peripheral, 5) and octa-(peripheral, 6) substituted with 2-mercaptopyridine and their respective quaternized derivatives (8 and 9) are reported. Photochemical and photophysical properties of the new complexes are compared with those of the previously reported peripherally tetra-substituted complexes 7 and 10. The quaternized compounds exhibit excellent solubility in water, making them potential photosensitizers for use in photodynamic therapy (PDT) of cancer. Spectroscopic, aggregation, photophysical and photochemical properties of these complexes are also investigated and compared. Photophysical (fluorescence quantum yields and lifetimes) and photochemical (singlet oxygen and photodegradation quantum yield) properties of these phthalocyanine photosensitizers are very important for the assessment of these complexes as PDT agents. In this study, the effects of the position of the substituents and quaternization of the substituents on the photophysical and photochemical parameters of the zinc phthalocyanines are also reported. This study also showed that the water-soluble quaternized zinc phthalocyanines strongly bind to blood plasma proteins such as bovine serum albumin (BSA).
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When breast is not best: young women and breast reduction surgery
- Lamb, Tessa, Vincent, Louise
- Authors: Lamb, Tessa , Vincent, Louise
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141832 , vital:38008 , DOI: 10.1080/10130950.2011.610978
- Description: Most cosmetic surgery patients in South Africa are younger than 21, and in this focus we examine narrative accounts from young South African women who have chosen to undergo cosmetic breast reduction surgery. Feminist debates on cosmetic surgery have focused on the question of whether to regard women who modify their bodies in this way as active agents engaged in liberatory ‘body projects’, or whether such projects are evidence of their subjection to oppressive stereotypes and beauty norms. The latter perspective is challenged here by the participants’ characterisation of breast reduction surgery as profoundly ‘freeing’. The article deals in particular with the conscious choice of participants to knowingly risk not being able to breastfeed children in future in order to achieve a body type which conforms to their understanding of youthful beauty and sexuality.
- Full Text:
- Authors: Lamb, Tessa , Vincent, Louise
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141832 , vital:38008 , DOI: 10.1080/10130950.2011.610978
- Description: Most cosmetic surgery patients in South Africa are younger than 21, and in this focus we examine narrative accounts from young South African women who have chosen to undergo cosmetic breast reduction surgery. Feminist debates on cosmetic surgery have focused on the question of whether to regard women who modify their bodies in this way as active agents engaged in liberatory ‘body projects’, or whether such projects are evidence of their subjection to oppressive stereotypes and beauty norms. The latter perspective is challenged here by the participants’ characterisation of breast reduction surgery as profoundly ‘freeing’. The article deals in particular with the conscious choice of participants to knowingly risk not being able to breastfeed children in future in order to achieve a body type which conforms to their understanding of youthful beauty and sexuality.
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Where leaders learn: constructions of leadership and leadership development at Rhodes University
- Authors: Andrews, Rushda Ruth
- Date: 2011
- Subjects: Leadership -- Education (Higher) -- South Africa -- Grahamstown Leadership -- Research -- South Africa -- Grahamstown Development leadership -- Education (Higher) -- South Africa -- Grahamstown Rhodes University -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:782 , http://hdl.handle.net/10962/d1003903
- Description: This thesis explores the Where Leaders Learn slogan of Rhodes University. It does this by means of an analysis of discourses constructing leadership and leadership development within the institutional context. The discourse analysis was made possible as a result of interviews with a range of people involved in leadership and leadership development at the University. The analysis revealed that leadership development is constructed as taking place within a highly structured system that enables instructional and managerial leadership but constrains transformational leadership. The discourses that give meaning and understanding to the construct of leadership draw heavily on position within a hierarchy. The discourse of functional efficiency is enabled through practices related to reward, recognition, succession planning and mentorship which all serve to replicate the existing leadership structures creating more of the same and in essence stifling the potential for emancipatory leadership. The analysis also shows that a discourse of collegiality serves to create a false sense of a common understanding of leadership in the light of evidence of uncertainty and contestation around the meaning of the slogan Where Leaders Learn and, by association, the very construct of leadership. The discursive process of understanding leadership and developing an institutional theory for the purposes of infusing this into a curriculum poses many challenges. Barriers to new ways of thinking reside within the researchers' ontological and epistemological commitments. This amplifies the need for a more reflective ontology towards leadership and its consequences, especially so in a multidisciplinary environment such as Rhodes University.
- Full Text:
- Authors: Andrews, Rushda Ruth
- Date: 2011
- Subjects: Leadership -- Education (Higher) -- South Africa -- Grahamstown Leadership -- Research -- South Africa -- Grahamstown Development leadership -- Education (Higher) -- South Africa -- Grahamstown Rhodes University -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:782 , http://hdl.handle.net/10962/d1003903
- Description: This thesis explores the Where Leaders Learn slogan of Rhodes University. It does this by means of an analysis of discourses constructing leadership and leadership development within the institutional context. The discourse analysis was made possible as a result of interviews with a range of people involved in leadership and leadership development at the University. The analysis revealed that leadership development is constructed as taking place within a highly structured system that enables instructional and managerial leadership but constrains transformational leadership. The discourses that give meaning and understanding to the construct of leadership draw heavily on position within a hierarchy. The discourse of functional efficiency is enabled through practices related to reward, recognition, succession planning and mentorship which all serve to replicate the existing leadership structures creating more of the same and in essence stifling the potential for emancipatory leadership. The analysis also shows that a discourse of collegiality serves to create a false sense of a common understanding of leadership in the light of evidence of uncertainty and contestation around the meaning of the slogan Where Leaders Learn and, by association, the very construct of leadership. The discursive process of understanding leadership and developing an institutional theory for the purposes of infusing this into a curriculum poses many challenges. Barriers to new ways of thinking reside within the researchers' ontological and epistemological commitments. This amplifies the need for a more reflective ontology towards leadership and its consequences, especially so in a multidisciplinary environment such as Rhodes University.
- Full Text:
Zimbabwe's Land Reform: myths and realities
- Authors: Helliker, Kirk D
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144710 , vital:38372 , DOI: 10.1080/02589001.2011.581502
- Description: Zimbabwe’s land reform is the first book on contemporary Zimbabwe that offers an empirically-rich and detailed account of redistributed farms that arose from ‘fasttrack’ land reform 10 years ago. In order to fully appreciate the significance of this book, it is necessary to outline briefly recent intellectual debates on Zimbabwe. Two main positions exist on Zimbabwean politics and society. The first position argues that the radical restructuring of agrarian relations (including undermining white agricultural capital and breaking up large commercial farms into smaller units) is a progressive tendency that has opened up opportunities for black small-scale farmers. Simultaneously, this position often underplays the existence of state restructuring of an authoritarian kind. The second position argues that land redistribution has dramatically undercut agricultural production thereby severely compromising food security for all Zimbabweans. It brings to the fore violent state action in instigating land occupations and in thwarting political opposition to ‘fast-track’.
- Full Text:
- Authors: Helliker, Kirk D
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144710 , vital:38372 , DOI: 10.1080/02589001.2011.581502
- Description: Zimbabwe’s land reform is the first book on contemporary Zimbabwe that offers an empirically-rich and detailed account of redistributed farms that arose from ‘fasttrack’ land reform 10 years ago. In order to fully appreciate the significance of this book, it is necessary to outline briefly recent intellectual debates on Zimbabwe. Two main positions exist on Zimbabwean politics and society. The first position argues that the radical restructuring of agrarian relations (including undermining white agricultural capital and breaking up large commercial farms into smaller units) is a progressive tendency that has opened up opportunities for black small-scale farmers. Simultaneously, this position often underplays the existence of state restructuring of an authoritarian kind. The second position argues that land redistribution has dramatically undercut agricultural production thereby severely compromising food security for all Zimbabweans. It brings to the fore violent state action in instigating land occupations and in thwarting political opposition to ‘fast-track’.
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‘Adolescence’, pregnancy and abortion: constructing a threat of degeneration
- Authors: Macleod, Catriona I
- Date: 2011
- Subjects: Adolescent Development Gender identity Gender studies
- Language: English
- Type: Book
- Identifier: vital:545 , http://hdl.handle.net/10962/d1014341 , https://www.tandfonline.com/doi/pdf/10.1080/13691058.2013.774523
- Description: Why, despite evidence to the contrary, does the narrative of the negative consequences of teenage pregnancy, abortion and childbearing persist? This book outlines a critical view of "teenage pregnancy" and abortion, arguing that the negativity surrounding early reproduction is underpinned by a particular understanding of adolescence. The book traces the invention of "adolescence" and the imaginary wall that the notion of "adolescence" constructs between young people and adults. It examines the entrenched status of "adolescence" within a colonialist discourse that equates development of the individual with the development of civilisation, and the consequent threat of degeneration that is implied in the very notion of "adolescence". Many important issues are explored, such as the ideologies and contradictions contained within the notion of "adolescence"; the invention of teenage pregnancy as a social problem; the construction of abortion as the new social problem; issues of race, culture and tradition in relation to teenage pregnancy; and health service provider practices, specifically in relation to managing risk. In the final chapter, an argument is made for a shift from the signifier "teenage pregnancy" to "unwanted pregnancy". Using data gathered from studies from four continents, this book highlights central issues in the global debate concerning teenage pregnancy. It is suitable for academics, postgraduate and undergraduate students of health psychology, women’s studies, nursing and sociology, as well as practitioners in the fields of youth and social work, medicine and counselling.
- Full Text: false
- Authors: Macleod, Catriona I
- Date: 2011
- Subjects: Adolescent Development Gender identity Gender studies
- Language: English
- Type: Book
- Identifier: vital:545 , http://hdl.handle.net/10962/d1014341 , https://www.tandfonline.com/doi/pdf/10.1080/13691058.2013.774523
- Description: Why, despite evidence to the contrary, does the narrative of the negative consequences of teenage pregnancy, abortion and childbearing persist? This book outlines a critical view of "teenage pregnancy" and abortion, arguing that the negativity surrounding early reproduction is underpinned by a particular understanding of adolescence. The book traces the invention of "adolescence" and the imaginary wall that the notion of "adolescence" constructs between young people and adults. It examines the entrenched status of "adolescence" within a colonialist discourse that equates development of the individual with the development of civilisation, and the consequent threat of degeneration that is implied in the very notion of "adolescence". Many important issues are explored, such as the ideologies and contradictions contained within the notion of "adolescence"; the invention of teenage pregnancy as a social problem; the construction of abortion as the new social problem; issues of race, culture and tradition in relation to teenage pregnancy; and health service provider practices, specifically in relation to managing risk. In the final chapter, an argument is made for a shift from the signifier "teenage pregnancy" to "unwanted pregnancy". Using data gathered from studies from four continents, this book highlights central issues in the global debate concerning teenage pregnancy. It is suitable for academics, postgraduate and undergraduate students of health psychology, women’s studies, nursing and sociology, as well as practitioners in the fields of youth and social work, medicine and counselling.
- Full Text: false
“Beautiful powerful you” : an analysis of the subject positions offered to women readers of Destiny magazine
- Authors: Jangara, Juliana
- Date: 2011
- Subjects: Destiny Magazine , Women's periodicals , Women, Black -- South Africa -- Social conditions , Sex role -- South Africa , Femininity -- South Africa , Women -- Identity , Feminism and mass media , Femininity (Philosophy)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3533 , http://hdl.handle.net/10962/d1013395
- Description: Women's magazines are popular cultural forms which offer readers representations intended to advise women on how to work towards and achieve idealised femininities. They perform such a function within the wider socio-historical context of gender relations. In a country such as South Africa, where patriarchal gender relations have historically been structured to favour men over women and masculinity over femininity, the representation of femininity in contemporary women's magazines may serve to reinforce or challenge these existent unequal gender relations. Informed by a feminist poststructuralist understanding of the gendered positioning of subjects through discourse, this study is a textual analysis that investigates the subject positions or possible identities offered to readers of Destiny, a South African business and lifestyle women's magazine. Black women, who make up the majority of Destiny's readership, have historically been excluded from the formal economy. In light of such a background, Destiny offers black women readers, through its representations of well-known business women, possible identities to take up within the white male dominated field of business practice. The magazine also offers 'lifestyle content', which suggests to readers possible ways of being in other areas of social life. Through a method of critical discourse analysis, this study critically analyses the subject positions offered to readers of Destiny, in order to determine to what extent the magazine's representations of business women endorse or confront unequal gender relations. The findings of this study are that Destiny offers women complex subject positions which simultaneously challenge and reassert patriarchy. While offering readers positions from which to challenge race based gender discrimination – a legacy of the apartheid past – the texts analysed tend to neglect non-racially motivated gender prejudice. It is concluded that although not comprehensively challenging unequal gender relations, the magazine whittles away some tenets of patriarchy.
- Full Text:
- Authors: Jangara, Juliana
- Date: 2011
- Subjects: Destiny Magazine , Women's periodicals , Women, Black -- South Africa -- Social conditions , Sex role -- South Africa , Femininity -- South Africa , Women -- Identity , Feminism and mass media , Femininity (Philosophy)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3533 , http://hdl.handle.net/10962/d1013395
- Description: Women's magazines are popular cultural forms which offer readers representations intended to advise women on how to work towards and achieve idealised femininities. They perform such a function within the wider socio-historical context of gender relations. In a country such as South Africa, where patriarchal gender relations have historically been structured to favour men over women and masculinity over femininity, the representation of femininity in contemporary women's magazines may serve to reinforce or challenge these existent unequal gender relations. Informed by a feminist poststructuralist understanding of the gendered positioning of subjects through discourse, this study is a textual analysis that investigates the subject positions or possible identities offered to readers of Destiny, a South African business and lifestyle women's magazine. Black women, who make up the majority of Destiny's readership, have historically been excluded from the formal economy. In light of such a background, Destiny offers black women readers, through its representations of well-known business women, possible identities to take up within the white male dominated field of business practice. The magazine also offers 'lifestyle content', which suggests to readers possible ways of being in other areas of social life. Through a method of critical discourse analysis, this study critically analyses the subject positions offered to readers of Destiny, in order to determine to what extent the magazine's representations of business women endorse or confront unequal gender relations. The findings of this study are that Destiny offers women complex subject positions which simultaneously challenge and reassert patriarchy. While offering readers positions from which to challenge race based gender discrimination – a legacy of the apartheid past – the texts analysed tend to neglect non-racially motivated gender prejudice. It is concluded that although not comprehensively challenging unequal gender relations, the magazine whittles away some tenets of patriarchy.
- Full Text: