List of Titles

The Development of Palladium(II)-Specific Amine-Functionalized Silica-Based Microparticles: Adsorption and Column Separation Studies

- Fayemi, Omolola E, Ogunlaja, Adeniyi S, Antunes, Edith M, Nyokong, Tebello, Tshentu, Zenixole R

Authors: Fayemi, Omolola E , Ogunlaja, Adeniyi S , Antunes, Edith M , Nyokong, Tebello , Tshentu, Zenixole R
Date: 2015
Language: English
Type: Article
Identifier: vital:7269 , http://hdl.handle.net/10962/d1020278
Description: The adsorption and separation of platinum(IV) and palladium(II) chlorido species ([PtCl6]2− and [PdCl4]2−) on silica-based microparticles functionalized with ammonium centers based on ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetriamine (TETA) and tris-(2-aminoethyl)amine (TAEA) were investigated. The functionalized sorbent materials were characterized using SEM, XPS, BET, and FTIR. The sorbents were used in the batch and column study for adsorption and selective separation of [PtCl62− and PdCl4]2−. The adsorption model for both [PtCl6]2− and [PdCl4]2− on the different sorbent materials fitted the Freundlich isotherm with R2 values > 0.99. The S-TETA sorbent material was palladium(II) specific. Pd(II) loaded on the silica column was recovered using 3% m/v thiourea solution as the eluting agent. Separation of platinum and palladium was achieved by selective stripping of [PtCl6]2− with 0.5 M of NaClO4 in 1.0 M HCl while Pd(II) was eluted with 0.5 M thiourea in 1.0 M HCl. The separation of palladium (Pd) from a mixture containing platinum (Pt), iridium (Ir), and rhodium (Rh) was successful on silica functionalized with triethylenetriamine (TETA) showing specificity for palladium(II) and a loading capacity of 0.27 mg/g. S-TETA showed potential for use in the recovery of palladium from platinum group metals such as from solutions of worn out automobile emission control catalytic convertors and other secondary sources. , Original publication is available at http://dx.doi.org/10.1080/01496395.2014.978017
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Date Issued: 2015

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The time of hospitality in Samuel Beckett's Murphy, Michael Ondaatje's The English Patient and Damon Galgut's The Good Doctor:

- Marais, Mike

Authors: Marais, Mike
Date: 2015
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/144106 , vital:38312 , DOI: 10.1080/00138398.2015.1083193
Description: In this article, I focus on the temporal dimension of the differential process through which community constitutes itself. If community is premised on the sameness that is enabled by that which it excludes, and sees as a threat, then it must seek always to conserve itself and to render the future – which is hazardous in its uncertainty – calculable, predictable and determinable. In its search for stability and permanence, community must dominate time in such a way that it is overcome, that it withdraws from itself. Arguably, though, we would view time less teleologically and programmatically, if we could relate differently to the difference on which community depends. A form of hospitality that is predicated on an acceptance of otherness – not only that of a community's outsiders, but also the ‘common strangeness’ of its insiders – would alter the ways in which being-in-common is conceived, and would also change our experience of belonging.
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Date Issued: 2015

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Assessment of the long-term response to rehabilitation of two wetlands in KwaZulu-Natal, South Africa:

- Cowden, Craig, Kotze, Donovan C, Ellery, William F N, Sieben, E J J

Authors: Cowden, Craig , Kotze, Donovan C , Ellery, William F N , Sieben, E J J
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/144431 , vital:38345 , DOI: 10.2989/16085914.2014.954518
Description: Assessing the ecological outcomes of wetland rehabilitation activities is an important need recognised by the ‘Working for Wetlands’ programme in South Africa. An assessment of ecological response was conducted in the Killarney and Kruisfontein wetlands, KwaZulu-Natal, in 2005 prior to rehabilitation in 2006, and again in 2011 and 2012, respectively, following rehabilitation. The assessment criteria included an evaluation of changes in ecological integrity, the supply of ecosystem services, and vegetation composition. Improvements in hydrological and geomorphic integrity were recorded in both wetlands, resulting in improved ecosystem delivery.
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Date Issued: 2014

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Competition between two aquatic macrophytes, Lagarosiphon major (Ridley) Moss (Hydrocharitaceae) and Myriophyllum spicatum Linnaeus (Haloragaceae) as influenced by substrate sediment and nutrients

- Martin, Grant D, Coetzee, Julie A

Authors: Martin, Grant D , Coetzee, Julie A
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/76925 , vital:30641 , https://doi.org/10.1016/j.aquabot.2013.11.001
Description: Competition between two globally economic and ecologically important submerged aquatic macrophytes, Lagarosiphon major (Rid.) Moss ex Wager and Myriophyllum spicatum L., was studied in response to growing in different substrate nutrient and sediment treatments. Addition series experiments were conducted with mixed plantings of L. major and M. spicatum grown under two soil nutrient concentrations (high vs. low) and two sediment treatments (sand vs. loam). Competitive ability of the plants was determined using an inverse linear model of the total dry weights as the yield variable. In high nutrient sediment treatments, L. major was the stronger competitor relative to M. spicatum, with one L. major plant being competitively equivalent to 2.5 M. spicatum plants in terms of their respective ability to reduce L. major biomass. In the loam sediment treatments, L. major was an even stronger competitor relative to M. spicatum with one L. major being equivalent to 10 M. spicatum plants. Additionally, L. major had a faster relative growth rate (RGR) than M. spicatum when grown in mixed cultures, a loam sediment type and at both high and low planting densities. The results indicated that L. major is a superior competitor to M. spicatum and that both nutrient and sediment conditions significantly affect the competitive ability of both species. The results contribute to the understanding of competition between submerged invasive macrophytes, and provide insight into the establishment and spread of invasive submerged macrophytes.
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Date Issued: 2014

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Developing a relational perspective on intergenerational learning

- Schudel, Ingrid J

Authors: Schudel, Ingrid J
Date: 2014
Subjects: To be catalogued
Language: English
Type: text , book chapter
Identifier: http://hdl.handle.net/10962/437161 , vital:73349 , ISBN 978-9086862528 , https://doi.org/10.3920/978-90-8686-802-5_16
Description: This chapter argues for a critical perspective on the use of lo-cal knowledge and practices in teaching and learning, present-ing some pedagogical thinking tools for reviewing intergenera-tional teaching and learning processes. The chapter highlights five relational elements in teaching and learning processes, including the relationship between individual and community, social and historic contexts, school-based actions and local practices, local and regional/national/global concerns, and fi-nally between local knowledge and abstract school knowledge. These relational elements of learning illustrate how it is possi-ble to mitigate against conservative, over-simplistic or idealistic responses to environmental concerns. This argument is illus-trated through reference to a lesson designed and implement-ed by a school teacher participating in a Rhodes University ac-credited teacher professional development course–the Schools and Sustainability course. This teacher depended substantially on intergenerational communication for her les-son, which supported Grade 1 pupils to research the use of wild vegetables historically in their community and plant these vegetables in their school garden with the support of knowledgeable community members.
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Date Issued: 2014

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Development and evaluation of pictograms on medication labels for patients with limited literacy skills in a culturally diverse multiethnic population:

- Kheir, Nadir, Awaisu, Ahmed, Radoui, Amina, El Badawi, Aya, Jean, Linda, Dowse, Roslind

Authors: Kheir, Nadir , Awaisu, Ahmed , Radoui, Amina , El Badawi, Aya , Jean, Linda , Dowse, Roslind
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/156720 , vital:40041 , https://doi.org/10.1016/j.sapharm.2013.11.003
Description: Much of the migrant workforce in Qatar is of low literacy level and does not understand Arabic or English, presenting a significant challenge to health care professionals. Medicine labels are typically in Arabic and English and are therefore poorly understood by these migrant workers. To develop pictograms illustrating selected medicine label instructions and to evaluate comprehension of the pictograms or conventional text supported with verbal instructions in foreign workers with low literacy skills.
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Date Issued: 2014

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Diagnosing the sexual pattern of Diplodus cervinus hottentotus (Pisces: Sparidae) from southern Angola

- Winkler, Alexander C, Santos, Carmen V D, Potts, Warren M

Authors: Winkler, Alexander C , Santos, Carmen V D , Potts, Warren M
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/124286 , vital:35589 , https://doi.10.1007/s11160-006-9034-6
Description: The sexual pattern of Diplodus cervinus hottentotus was investigated in southern Angola. Females were significantly smaller and found in greater numbers, with an adult sex ratio of 1.0:0.7, F:M. Histological observations of preserved gonads indicated that the species is a rudimentary hermaphrodite, possessing a non-functional bisexual ovotestis before maturation. Histological examination of five macroscopically staged ‘bisexual’ individuals revealed that they were functional males with residual ovarian tissue in the gonad, which had persisted from a juvenile bisexual stage. Although empirical population structure and macroscopic observations suggested protogyny, histological evidence suggested otherwise, confirming the need for the use of histology when diagnosing the sexual pattern of sparid fishes.
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Date Issued: 2014

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Empathetic apprentice: pedagogical developments in aesthetic education of the social learning practitioner in South Africa

- McGarry, Dylan K

Authors: McGarry, Dylan K
Date: 2014
Subjects: To be catalogued
Language: English
Type: text , book chapter
Identifier: http://hdl.handle.net/10962/437176 , vital:73350 , ISBN 978-9086862528 , https://doi.org/10.3920/978-90-8686-802-5_12
Description: Apprenticeship is an ancient and intuitive approach to learning, yet today traditional forms of apprenticeship are becoming in-creasingly scarce. The role of apprenticeship in relation to learning through embodied, first hand experience is somewhat overlooked, particularly in the the pedagogical development of social learning. Understanding this in my early doctoral re-search, I focused on the process of apprenticeship and its contribution to social learning practice. I moved beyond the concept of traditional apprenticeship (that of learning a specific artisan practice) and explored the possibility of sharpening my capacities as an ‘ecological-citizen’; expanding Education for Sustainable Development (ESD) concepts, and investigating a wider embodied learning of a citizen situated in a greater social-ecological phenomenon.
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Date Issued: 2014

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Human perception of the measurement of a network attack taxonomy in near real-time

- Van Heerden, Renier, Malan, Mercia M, Mouton, Francois, Irwin, Barry V W

Authors: Van Heerden, Renier , Malan, Mercia M , Mouton, Francois , Irwin, Barry V W
Date: 2014
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/429924 , vital:72652 , https://doi.org/10.1007/978-3-662-44208-1_23
Description: This paper investigates how the measurement of a network attack taxonomy can be related to human perception. Network attacks do not have a time limitation, but the earlier its detected, the more damage can be prevented and the more preventative actions can be taken. This paper evaluate how elements of network attacks can be measured in near real-time(60 seconds). The taxonomy we use was developed by van Heerden et al (2012) with over 100 classes. These classes present the attack and defenders point of view. The degree to which each class can be quantified or measured is determined by investigating the accuracy of various assessment methods. We classify each class as either defined, high, low or not quantifiable. For example, it may not be possible to determine the instigator of an attack (Aggressor), but only that the attack has been launched by a Hacker (Actor). Some classes can only be quantified with a low confidence or not at all in a sort (near real-time) time. The IP address of an attack can easily be faked thus reducing the confidence in the information obtained from it, and thus determining the origin of an attack with a low confidence. This determination itself is subjective. All the evaluations of the classes in this paper is subjective, but due to the very basic grouping (High, Low or Not Quantifiable) a subjective value can be used. The complexity of the taxonomy can be significantly reduced if classes with only a high perceptive accuracy is used.
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Date Issued: 2014

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Hyperbenthic and pelagic predators regulate alternate key planktonic copepods in shallow temperate estuaries

- Wasserman, Ryan J, Vink, Tim J F, Kramer, Rachel, Froneman, P William

Authors: Wasserman, Ryan J , Vink, Tim J F , Kramer, Rachel , Froneman, P William
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/68224 , vital:29220 , https://doi.org/10.1071/MF13233
Description: Publisher version , Although predation has been identified as an important community driver, the role of predator diversity in structuring estuarine zooplankton has not been assessed. As such, we investigated the effects of two different zooplanktivorous fish species on the estuarine zooplankton community during a 12-day mesocosm study. Three experimental treatments were established, whereby natural zooplankton communities were subject to either (1) no predatory pressure, (2) predation by a pelagic predator (Monodactylus falciformis) or (3) predation by a hyper-benthic predator (Glossogobius callidus). The pelagic feeding M. falciformis fed largely on the numerically dominant mid-water copepod species, Paracartia longipatella. In contrast, the hyper-benthic fish had a greater predatory impact on the less numerically dominant copepod, Pseudodiaptomus hessei, which demonstrates strong diel vertical migration. Variations in prey-population regulation are ascribed to the distinct behavioural differences of the predators, and mediated by the differences in behaviour of the copepod species.
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Date Issued: 2014

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Reappraising the concept of biocultural diversity: a perspective from South Africa

- Cocks, Michelle L, Wiersum, K Freerk

Authors: Cocks, Michelle L , Wiersum, K Freerk
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/141176 , vital:37950 , DOI: 10.1007/s10745-014-9681-5
Description: Biocultural diversity has been conceptualised as the sum of the world’s differences regarding biological diversity at all levels and cultural diversity in all its manifestations, and their interactions. The concept is often framed in the context of conservation as a retention versus loss model by emphasizing the religious and spiritual values of the natural environment and the positive interactions between traditional indigenous people and conservation of natural ecosystems and indigenous species. On the basis of our research amongst the ‘non-traditional’ amaXhosa in South Africa, we argue that this interpretation is too narrow and that the concept needs to be reappraised in order to capture the dynamic, complex and relational nature of bio-cultural diversity relations. We conclude that the concept involves a complex of human values and practices related to the three main dimensions of biodiversity at landscapes, species and genetic levels.
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Date Issued: 2014

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Smallholder farmers’ access to credit in the Amathole District Municipality, Eastern Cape Province, South Africa

- Baiyegunhi, Lloyd J S, Fraser, Gavin C G

Authors: Baiyegunhi, Lloyd J S , Fraser, Gavin C G
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/69351 , vital:29503 , https://jarts.info/index.php/jarts/article/view/2014121946870/814
Description: Provision of credit has being identified as an important instrument for improving the welfare of smallholder farmers directly and for enhancing productive capacity through financing investment by the farmers in their human and physical capital. This study investigated the individual and household characteristics that influence credit market access in Amathole District Municipality, Eastern Cape Province, South Africa, using a cross sectional data from smallholder farmers’ household survey. The aim is to provide a better understanding of the households’ level socio-economic characteristics, not only because they influence household’s demand for credit but also due to the fact that potential lenders are most likely to base their assessment of borrowers’ creditworthiness on such characteristics. The results of the logistic regression suggest that credit market access was significantly influenced by variables such as gender, education, households’ income, value of assets, savings, dependency ratio, repayment capacity and social capital. Implications for rural credit delivery are discussed.
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Date Issued: 2014

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Some life-history parameters of the non-native amphipod Platorchestia platensis (Talitridae) in a warm temperate South African estuary

- Hodgson, Alan N, Booth, Anthony J, David-Engelbrecht, Viginia, Henninger, Tony O

Authors: Hodgson, Alan N , Booth, Anthony J , David-Engelbrecht, Viginia , Henninger, Tony O
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/126976 , vital:35940 , https://doi.10.1080/0035919X.2014.941961
Description: Density, population structure, growth, mortality and aspects of reproduction of the non-native amphipod Platorchestia platensis were studied for 20 consecutive months (October 2008 to May 2010) in the supralittoral wrack of the Knysna Estuary, South Africa. Amphipod density varied over the sampling period with the lowest numbers recorded in summer (January and February). Ovigerous females with embryos, and juveniles were found in most months with peaks in recruitment found in both April and October, suggesting that in Knysna this species is a biannual breeder. Average female size was significantly greater in winter, with larger females tending to brood more embryos. The largest adults (13.5 mm total length) were always male although the monthly sex ratio was nearly always female biased. Growth rate estimated from a cohort analysis was about 1 mm per month and monthly survival about 69%. The ability to reproduce all year round may be one reason why this introduced species has become established within this warm temperate estuary.
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Date Issued: 2014

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Songs of two starling species: common traits versus adaptations to the social environment

- Houdelier, C, Hausberger, Martine, Craig, Adrian J F K

Authors: Houdelier, C , Hausberger, Martine , Craig, Adrian J F K
Date: 2014
Subjects: To be catalogued
Language: English
Type: article
Identifier: http://hdl.handle.net/10962/465475 , vital:76612 , https://doi.org/10.1007/s00114-012-0987-0
Description: We analysed, for the first time, songs of the African Red-winged Starling Onychognathus morio and compared their general characteristics with those of the European Starling Sturnus vulgaris. Both species are gregarious during the non-breeding season, but European Starlings tend to nest in colonies, form unstable pair-bonds and are occasionally polygynous, whereas Red-winged Starlings form long-term pair-bonds and occupy exclusive nesting territories. Red-winged Starlings produced the same basic song categories as European Starlings: warbles and whistles. These two categories appeared to be involved in similar social interactions in the two species. However, several aspects of song behaviour differed between the two species: Red-winged Starlings, breeding in isolated nests, preferentially used whistles for long-distance communication and showed a simpler organization of warbling song. Whistles in the Red-winged Starling were mostly shared between birds and, in contrast to the European Starling, were not indicators of individual identity. Also in contrast to the European Starling, female song in Red-winged Starlings appeared very important throughout the breeding period. Our results suggest that some song characteristics in the two species are phylogenetically conserved whereas others are affected by the distinct social systems of the two species.
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Date Issued: 2014

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Xenophobia, sovereign power and the limits of citizenship:

- Idahosa, Grace E, Vincent, Louise

Authors: Idahosa, Grace E , Vincent, Louise
Date: 2014
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/141970 , vital:38020 , DOI: 10.1080/09744053.2014.914637
Description: African foreigners in South Africa have frequently been the targets of violent and discriminatory practices, which occur in the enabling context of negative discourses concerning African foreigners that circulate in various spheres of public life. This study is interested in one particular field of interaction between African foreigners and the South African state, namely the public health sector. Discriminatory and, sometimes, violent practices towards African foreigners on the part of South African citizens are widely documented. Less discussed are the ways in which these practices of violence and discrimination are in fact state practices. We show this with reference to the treatment of African foreigners in the public health sector. We refer to this prejudicial treatment as health-care Xenophobia which is made possible by a wider set of discourses related to citizenship and the rights accruing to citizens which suggest the ‘non-rights’ of the non-citizen.
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Date Issued: 2014

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