Was Myriophyllum spicatum L.(Haloragaceae) recently introduced to South Africa from Eurasia?
- Weyl, Philip S, Thum, RA, Moody, ML, Newman, RM, Coetzee, Julie A
- Authors: Weyl, Philip S , Thum, RA , Moody, ML , Newman, RM , Coetzee, Julie A
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/425463 , vital:72242 , xlink:href="https://doi.org/10.1016/j.aquabot.2015.09.003"
- Description: There is debate over the native or exotic status of Myriophyllum spicatum L. (Haloragaceae) in South Africa, which has important implications for developing and implementing management strategies. The aim of this study was to determine if M. spicatum was recently introduced from Eurasia by reconstructing the genetic relationships between South African and Eurasian M. spicatum using both a nuclear ribosomal (ITS1-5.8S-ITS2-26S) and a chloroplast intron (trnQ-rps16) sequence from 40 populations. For both these DNA markers, the South African populations were distinct from Eurasian populations, but always stemmed from a European origin. The data suggest that South African and European M. spicatum share a common ancestor, however the divergence of both markers are characteristic of a long period of isolation rather than a recent introduction from Europe. The genetic data from this study suggest that M. spicatum has not been introduced recently, but is most likely a native component of the South African flora.
- Full Text:
- Date Issued: 2016
- Authors: Weyl, Philip S , Thum, RA , Moody, ML , Newman, RM , Coetzee, Julie A
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/425463 , vital:72242 , xlink:href="https://doi.org/10.1016/j.aquabot.2015.09.003"
- Description: There is debate over the native or exotic status of Myriophyllum spicatum L. (Haloragaceae) in South Africa, which has important implications for developing and implementing management strategies. The aim of this study was to determine if M. spicatum was recently introduced from Eurasia by reconstructing the genetic relationships between South African and Eurasian M. spicatum using both a nuclear ribosomal (ITS1-5.8S-ITS2-26S) and a chloroplast intron (trnQ-rps16) sequence from 40 populations. For both these DNA markers, the South African populations were distinct from Eurasian populations, but always stemmed from a European origin. The data suggest that South African and European M. spicatum share a common ancestor, however the divergence of both markers are characteristic of a long period of isolation rather than a recent introduction from Europe. The genetic data from this study suggest that M. spicatum has not been introduced recently, but is most likely a native component of the South African flora.
- Full Text:
- Date Issued: 2016
Why a contextual approach to professional development?
- Leibowitz, B L, Vorster, Jo-Anne, Ndebele, C
- Authors: Leibowitz, B L , Vorster, Jo-Anne , Ndebele, C
- Date: 2016
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/61288 , vital:28009 , https://journals.co.za/content/journal/10520/EJC-4ad93ec2a
- Description: One of the peculiarities of the literature on academic professional development with regard to teaching is its a-political nature. It pays insufficient attention to issues of equity, and to how privilege, geographical location, class and ethnicity influence the way that staff in higher education learn to teach. This is surprising, or paradoxical, given the strong world-wide concern for widening participation and student success in higher education. The approaches towards professional academic development have been dominated by literature from the global North, which does not take into account conditions in resource-constrained environments. We contend that literature from these Southern environments enrich the international body of literature. Thus there is a need for scholarly writing on learning to teach in higher education, which takes a specifically social, contextual and relational approach and which considers these within resource-rich as well as resource-constrained environments.
- Full Text:
- Date Issued: 2016
- Authors: Leibowitz, B L , Vorster, Jo-Anne , Ndebele, C
- Date: 2016
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/61288 , vital:28009 , https://journals.co.za/content/journal/10520/EJC-4ad93ec2a
- Description: One of the peculiarities of the literature on academic professional development with regard to teaching is its a-political nature. It pays insufficient attention to issues of equity, and to how privilege, geographical location, class and ethnicity influence the way that staff in higher education learn to teach. This is surprising, or paradoxical, given the strong world-wide concern for widening participation and student success in higher education. The approaches towards professional academic development have been dominated by literature from the global North, which does not take into account conditions in resource-constrained environments. We contend that literature from these Southern environments enrich the international body of literature. Thus there is a need for scholarly writing on learning to teach in higher education, which takes a specifically social, contextual and relational approach and which considers these within resource-rich as well as resource-constrained environments.
- Full Text:
- Date Issued: 2016
Why a contextual approach to professional development?
- Leibowitz, B L, Vorster, Jo-Anne, Ndebele, C
- Authors: Leibowitz, B L , Vorster, Jo-Anne , Ndebele, C
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71141 , vital:29789 , https://doi.org/10.20853/30-6-714
- Description: One of the peculiarities of the literature on academic professional development with regard to teaching is its a-political nature. It pays insufficient attention to issues of equity, and to how privilege, geographical location, class and ethnicity influence the way that staff in higher education learn to teach. This is surprising, or paradoxical, given the strong world-wide concern for widening participation and student success in higher education. The approaches towards professional academic development have been dominated by literature from the global North, which does not take into account conditions in resource-constrained environments. We contend that literature from these Southern environments enrich the international body of literature. Thus there is a need for scholarly writing on learning to teach in higher education, which takes a specifically social, contextual and relational approach and which considers these within resource-rich as well as resource-constrained environments.
- Full Text:
- Date Issued: 2016
- Authors: Leibowitz, B L , Vorster, Jo-Anne , Ndebele, C
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71141 , vital:29789 , https://doi.org/10.20853/30-6-714
- Description: One of the peculiarities of the literature on academic professional development with regard to teaching is its a-political nature. It pays insufficient attention to issues of equity, and to how privilege, geographical location, class and ethnicity influence the way that staff in higher education learn to teach. This is surprising, or paradoxical, given the strong world-wide concern for widening participation and student success in higher education. The approaches towards professional academic development have been dominated by literature from the global North, which does not take into account conditions in resource-constrained environments. We contend that literature from these Southern environments enrich the international body of literature. Thus there is a need for scholarly writing on learning to teach in higher education, which takes a specifically social, contextual and relational approach and which considers these within resource-rich as well as resource-constrained environments.
- Full Text:
- Date Issued: 2016
Xenophilia in Muizenberg, South Africa: new potentials for race relations?
- Authors: Owen, Joy
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147972 , vital:38698 , (http://anthrosource.onlinelibrary.wiley.com/hub/journal/10.1111/(ISSN)1548-744X/about/author-guidelines.html)
- Description: Since the advent of democracy in 1994 race relations in South Africa have not improved substantially. The arrival of transmigrants from other African countries has emphasized a wounded South African psyche, as various xenophobic attitudes and attacks attest. However, a lesser known reality is the expression of xenophilia by South African women. In this article I argue that an intimate relationship between a South African coloured woman and a Congolese black man scripts a different potentiality for multiracial relations in the private and public spaces of urban Cape Town, South Africa.
- Full Text:
- Date Issued: 2016
- Authors: Owen, Joy
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147972 , vital:38698 , (http://anthrosource.onlinelibrary.wiley.com/hub/journal/10.1111/(ISSN)1548-744X/about/author-guidelines.html)
- Description: Since the advent of democracy in 1994 race relations in South Africa have not improved substantially. The arrival of transmigrants from other African countries has emphasized a wounded South African psyche, as various xenophobic attitudes and attacks attest. However, a lesser known reality is the expression of xenophilia by South African women. In this article I argue that an intimate relationship between a South African coloured woman and a Congolese black man scripts a different potentiality for multiracial relations in the private and public spaces of urban Cape Town, South Africa.
- Full Text:
- Date Issued: 2016
‘Abagyenda bareeba. Those who Travel, See’: Home, Migration and the Maternal Bond in Doreen Baingana’s Tropical Fish
- Authors: Spencer, Lynda G
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/139017 , vital:37696 , https://doi.org/10.1080/00020184.2016.1182319
- Description: Doreen Baingana’s Tropical Fish explores the migratory experiences of the main narrator-focalizer, Christine Mugisha, as she travels from Uganda to the United States of America. Although the analyses of home, exile, and migration by writers like Edward Said and Paul Tiyambe Zeleza tend to be ungendered; Baingana seems to elaborate on these concerns by reflecting on the gendered experience of travel. As Carole Boyce Davies has argued, the act of travelling and migration opens up new spaces and possibilities for black women writers as they come into contact with multiple places and cultures. In their encounters with migration, black women are able to negotiate and re-negotiate their identities. This article focuses on how Tropical Fish, interrogates complex, contradictory, ambiguous and often conflicted questions of home and migration with their concomitant issues of belonging and alienation/ estrangement and how they are intimately tied to the maternal bond.
- Full Text:
- Date Issued: 2016
- Authors: Spencer, Lynda G
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/139017 , vital:37696 , https://doi.org/10.1080/00020184.2016.1182319
- Description: Doreen Baingana’s Tropical Fish explores the migratory experiences of the main narrator-focalizer, Christine Mugisha, as she travels from Uganda to the United States of America. Although the analyses of home, exile, and migration by writers like Edward Said and Paul Tiyambe Zeleza tend to be ungendered; Baingana seems to elaborate on these concerns by reflecting on the gendered experience of travel. As Carole Boyce Davies has argued, the act of travelling and migration opens up new spaces and possibilities for black women writers as they come into contact with multiple places and cultures. In their encounters with migration, black women are able to negotiate and re-negotiate their identities. This article focuses on how Tropical Fish, interrogates complex, contradictory, ambiguous and often conflicted questions of home and migration with their concomitant issues of belonging and alienation/ estrangement and how they are intimately tied to the maternal bond.
- Full Text:
- Date Issued: 2016
“A Step Towards Silence”: Samuel Beckett’s The Unnamable and the Problem of Following the Stranger
- Authors: Marais, Mike
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144205 , vital:38320 , DOI: 10.1080/02564718.2016.1249617
- Description: In this article, I argue that Samuel Beckett’s The Unnamable evinces the kind of aesthetic ambivalence that Theodor Adorno, in Aesthetic Theory, ascribes to the artwork’s location both in and outside of society. By tracing the metaphors used in the narrator’s depiction of the act of narration, I demonstrate that this novel self-reflexively articulates and meditates on its ambivalent position in society. Thereafter, I relate the work’s suspicion of its medium, and therefore its estrangement from itself, to its critique of community’s norms of recognition, which are embedded in language. Finally, I reflect on the potential effect of the text’s aesthetic ambivalence on the reader.
- Full Text:
- Date Issued: 2016
- Authors: Marais, Mike
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144205 , vital:38320 , DOI: 10.1080/02564718.2016.1249617
- Description: In this article, I argue that Samuel Beckett’s The Unnamable evinces the kind of aesthetic ambivalence that Theodor Adorno, in Aesthetic Theory, ascribes to the artwork’s location both in and outside of society. By tracing the metaphors used in the narrator’s depiction of the act of narration, I demonstrate that this novel self-reflexively articulates and meditates on its ambivalent position in society. Thereafter, I relate the work’s suspicion of its medium, and therefore its estrangement from itself, to its critique of community’s norms of recognition, which are embedded in language. Finally, I reflect on the potential effect of the text’s aesthetic ambivalence on the reader.
- Full Text:
- Date Issued: 2016
“Turn on” fluorescence enhancement of Zn octacarboxyphthaloyanine-graphene oxide conjugates by hydrogen peroxide
- Shumba, Munyaradzi, Mashazi, Philani N, Nyokong, Tebello
- Authors: Shumba, Munyaradzi , Mashazi, Philani N , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/190438 , vital:44994 , xlink:href="https://doi.org/10.1016/j.jlumin.2015.11.001"
- Description: Zn octacarboxy phthalocyanine-reduced graphene oxide or graphene oxide conjugates were characterized by absorption spectroscopy, transmission electron microscopy, fluorescence spectroscopy, X-ray diffraction, thermo gravimetric analysis and X-ray photon spectroscopy. The presence of reduced graphene oxide or graphene oxide resulted in the quenching (turn on) of Zn octacarboxy phthalocyanine fluorescence which can be explained by photoinduced electron transfer. Zn octacarboxy phthalocyaninereduced graphene oxide or graphene oxide conjugates “turned on” fluorescence showed a linear response to hydrogen peroxide hence their potential to be used as sensors. The nanoprobe developed showed high selectivity towards hydrogen peroxide in the presence of physiological interferences.
- Full Text:
- Date Issued: 2016
- Authors: Shumba, Munyaradzi , Mashazi, Philani N , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/190438 , vital:44994 , xlink:href="https://doi.org/10.1016/j.jlumin.2015.11.001"
- Description: Zn octacarboxy phthalocyanine-reduced graphene oxide or graphene oxide conjugates were characterized by absorption spectroscopy, transmission electron microscopy, fluorescence spectroscopy, X-ray diffraction, thermo gravimetric analysis and X-ray photon spectroscopy. The presence of reduced graphene oxide or graphene oxide resulted in the quenching (turn on) of Zn octacarboxy phthalocyanine fluorescence which can be explained by photoinduced electron transfer. Zn octacarboxy phthalocyaninereduced graphene oxide or graphene oxide conjugates “turned on” fluorescence showed a linear response to hydrogen peroxide hence their potential to be used as sensors. The nanoprobe developed showed high selectivity towards hydrogen peroxide in the presence of physiological interferences.
- Full Text:
- Date Issued: 2016
“Turn on” fluorescence enhancement of Zn octacarboxyphthaloyanine-graphene oxide conjugates by hydrogen peroxide
- Shumba, Munyaradzi, Mashazi, Philani N, Nyokong, Tebello
- Authors: Shumba, Munyaradzi , Mashazi, Philani N , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/240875 , vital:50881 , xlink:href="https://doi.org/10.1016/j.jlumin.2015.11.001"
- Description: Zn octacarboxy phthalocyanine-reduced graphene oxide or graphene oxide conjugates were characterized by absorption spectroscopy, transmission electron microscopy, fluorescence spectroscopy, X-ray diffraction, thermo gravimetric analysis and X-ray photon spectroscopy. The presence of reduced graphene oxide or graphene oxide resulted in the quenching (turn on) of Zn octacarboxy phthalocyanine fluorescence which can be explained by photoinduced electron transfer. Zn octacarboxy phthalocyanine-reduced graphene oxide or graphene oxide conjugates “turned on” fluorescence showed a linear response to hydrogen peroxide hence their potential to be used as sensors. The nanoprobe developed showed high selectivity towards hydrogen peroxide in the presence of physiological interferences.
- Full Text:
- Date Issued: 2016
- Authors: Shumba, Munyaradzi , Mashazi, Philani N , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/240875 , vital:50881 , xlink:href="https://doi.org/10.1016/j.jlumin.2015.11.001"
- Description: Zn octacarboxy phthalocyanine-reduced graphene oxide or graphene oxide conjugates were characterized by absorption spectroscopy, transmission electron microscopy, fluorescence spectroscopy, X-ray diffraction, thermo gravimetric analysis and X-ray photon spectroscopy. The presence of reduced graphene oxide or graphene oxide resulted in the quenching (turn on) of Zn octacarboxy phthalocyanine fluorescence which can be explained by photoinduced electron transfer. Zn octacarboxy phthalocyanine-reduced graphene oxide or graphene oxide conjugates “turned on” fluorescence showed a linear response to hydrogen peroxide hence their potential to be used as sensors. The nanoprobe developed showed high selectivity towards hydrogen peroxide in the presence of physiological interferences.
- Full Text:
- Date Issued: 2016
'Meaningful engagement’: Towards a language rights paradigm for effective language policy implementation
- Docrat, Zakeerah, Kaschula, Russell H
- Authors: Docrat, Zakeerah , Kaschula, Russell H
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/174812 , vital:42512 , https://doi.org/10.1080/02572117.2015.1056455
- Description: This article aims to develop the concept of ‘meaningful engagement’ in terms of the contemporary language policy implementation framework in South Africa. By exploring the current language policies, implementation and the current lack of effectiveness, the authors offer a new implementation focus drawn from the legal concept of ‘meaningful engagement’. ‘Meaningful engagement’ is a concept within the socio-economic rights sphere. This article expands and advances the concept within a language policy framework. Against the enabling legislative environment created by the Use of Official Languages Act 12 of 2012 and the overarching Constitutional framework which embeds the rights of all official languages, ‘meaningful engagement’ is developed and applied to selected language policies and practices.
- Full Text:
- Date Issued: 2015
- Authors: Docrat, Zakeerah , Kaschula, Russell H
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/174812 , vital:42512 , https://doi.org/10.1080/02572117.2015.1056455
- Description: This article aims to develop the concept of ‘meaningful engagement’ in terms of the contemporary language policy implementation framework in South Africa. By exploring the current language policies, implementation and the current lack of effectiveness, the authors offer a new implementation focus drawn from the legal concept of ‘meaningful engagement’. ‘Meaningful engagement’ is a concept within the socio-economic rights sphere. This article expands and advances the concept within a language policy framework. Against the enabling legislative environment created by the Use of Official Languages Act 12 of 2012 and the overarching Constitutional framework which embeds the rights of all official languages, ‘meaningful engagement’ is developed and applied to selected language policies and practices.
- Full Text:
- Date Issued: 2015
Utilizing gesture recognition and Ethernet AVB for distributed surround sound control
- Hedges, Mitchell, Foss, Richard
- Authors: Hedges, Mitchell , Foss, Richard
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/426816 , vital:72393 , https://www.aes.org/e-lib/online/browse.cfm?elib=17540
- Description: Gesture recognition has become a preferred approach to the control of various systems. This allows users of the system to interact without having to use any controls or equipment. This paper investigates the use of gesture recognition in order to select and transport audio tracks over an Ethernet AVB network to speaker endpoints. The research uses equipment that is commercially available and relatively cost efficient. The endpoints receive audio samples that are encapsulated within network packets and processes them. The audio tracks are mixed at the endpoints according to gain ratios that will change and be different for each endpoint.
- Full Text:
- Date Issued: 2014
- Authors: Hedges, Mitchell , Foss, Richard
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/426816 , vital:72393 , https://www.aes.org/e-lib/online/browse.cfm?elib=17540
- Description: Gesture recognition has become a preferred approach to the control of various systems. This allows users of the system to interact without having to use any controls or equipment. This paper investigates the use of gesture recognition in order to select and transport audio tracks over an Ethernet AVB network to speaker endpoints. The research uses equipment that is commercially available and relatively cost efficient. The endpoints receive audio samples that are encapsulated within network packets and processes them. The audio tracks are mixed at the endpoints according to gain ratios that will change and be different for each endpoint.
- Full Text:
- Date Issued: 2014
A Review of Arterial Stiffness and HIV Infection in Adult Africans
- Awotedu, Kofoworola Olajire, Iputo, Jehu
- Authors: Awotedu, Kofoworola Olajire , Iputo, Jehu
- Date: 09-06-2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/3484 , vital:43615 , https://www.hilarispublisher.com/open-access/a-review-of-arterial-stiffness-and-hiv-infection-in-adult-africans-2167-1095-1000221.pdf
- Description: Aim: To review the impact of the human immunodeficiency virus and antiretroviral therapy on the vasculature. Objectives: This review seeks to identify the burden which the human immunodeficiency virus and antiretroviral therapy have on the vasculature. Method: Medline/PubMed and Google scholar were searched. There were over 100 publications reviewed. Some people who worked in similar fields were also contacted. The present review summarized current understanding of Human immunodeficiency virus, antiretroviral therapy and effect on the vasculature such as arterial stiffness. Atherosclerosis, endothelial dysfunction, the strengths and weaknesses of current testing strategies, and their potential applications in clinical research and patient care. The association of inflammatory biomarkers, blood pressure and ageing with arterial stiffness were also reviewed. Conclusion: Available literature shows that HIV and antiretroviral agents have a great impact on the vasculature and its progression.
- Full Text:
- Date Issued: 09-06-2016
- Authors: Awotedu, Kofoworola Olajire , Iputo, Jehu
- Date: 09-06-2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/3484 , vital:43615 , https://www.hilarispublisher.com/open-access/a-review-of-arterial-stiffness-and-hiv-infection-in-adult-africans-2167-1095-1000221.pdf
- Description: Aim: To review the impact of the human immunodeficiency virus and antiretroviral therapy on the vasculature. Objectives: This review seeks to identify the burden which the human immunodeficiency virus and antiretroviral therapy have on the vasculature. Method: Medline/PubMed and Google scholar were searched. There were over 100 publications reviewed. Some people who worked in similar fields were also contacted. The present review summarized current understanding of Human immunodeficiency virus, antiretroviral therapy and effect on the vasculature such as arterial stiffness. Atherosclerosis, endothelial dysfunction, the strengths and weaknesses of current testing strategies, and their potential applications in clinical research and patient care. The association of inflammatory biomarkers, blood pressure and ageing with arterial stiffness were also reviewed. Conclusion: Available literature shows that HIV and antiretroviral agents have a great impact on the vasculature and its progression.
- Full Text:
- Date Issued: 09-06-2016