List of Titles

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Now a jazz from distinctively South African

- Baneshik, Percy

Authors: Baneshik, Percy
Subjects: McGregor, Chris--1936-1990 , Jazz , Jazz musicians , Blue Notes (Musical group : South Africa) , Brotherhood of Breath (Musical group) , Dollar Brand
Language: English
Type: Article
Identifier: vital:13487 , http://hdl.handle.net/10962/d1005622 , McGregor, Chris--1936-1990 , Jazz , Jazz musicians , Blue Notes (Musical group : South Africa) , Brotherhood of Breath (Musical group) , Dollar Brand
Description: Photocopied article from the newspaper the Rand Daily Mail about "South African sound beginning to emerge in Jazz" developed by Chris McGregor. There is also a portrait of Chris McGregor with this article.
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Physical implications of prolonged sitting in a confined posture - a literature review

- Todd, Andrew I, Bennett, Anthea I, Christie, Candice J

Authors: Todd, Andrew I , Bennett, Anthea I , Christie, Candice J
Date: 2007
Language: English
Type: Article
Identifier: vital:6756 , http://hdl.handle.net/10962/d1009458
Description: The main purpose of this review article was to highlight some of the physical consequences of sitting for prolonged periods in a confined setting. More specifically, the review relates this research to call centre work and where applicable comments on the limited literature relating specifically to ergonomics research within call centre settings. In particular the article explores the biomechanical stresses placed on the musculoskeletal system during prolonged sitting at a workstation, and the physiological consequences thereof. The paper then provides possible solutions to reduce the physical strain placed on these workers by looking at workstation design and work organisation emphasizing worker education and the promotion of worker well being.
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Date Issued: 2007

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The evaluation of Eudragit microcapsules manufactured by solvent evaporation using USP Apparatus 1

- Khamanga, Sandile M, Parfitt, Natalie R, Nyamuzhiwa, Tsitsi, Haidula, Hendrina, Walker, Roderick B

Authors: Khamanga, Sandile M , Parfitt, Natalie R , Nyamuzhiwa, Tsitsi , Haidula, Hendrina , Walker, Roderick B
Date: 2009
Language: English
Type: text , Article
Identifier: vital:6389 , http://hdl.handle.net/10962/d1006310
Description: The objectives of this study were to prepare microcapsules containing verapamil and propranolol and to evaluate the kinetics and mechanism of drug release from the microcapsules using USP Apparatus 1. The effects of polymer concentration and polymer type on the cumulative amount of drug released were evaluated. The microcapsules were manufactured using Eudragit RS and RL polymers by solvent evaporation with the ultimate aim of prolonging drug release. Twenty-four formulations were prepared using different drug/polymer ratios. The effects of polymer type and polymer/drug ratios on the size, flow properties, surface morphology, and the release characteristics of the microcapsules were examined. The effects of drug inclusion methods on drug loading, encapsulation efficiency, and release properties of the complex microcapsules were also investigated. The formulations containing drug/polymer ratio 1:4 (w/w) were the most appropriate with respect to encapsulation efficiency (70%), flow properties (HR = 1.2), drug loading (15–20%), and drug release characteristics, in all cases. The release kinetics from the different formulations followed mainly a diffusion-controlled mechanism.
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Date Issued: 2009

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An ion-imprinted polymer for the selective extraction of mercury(II) ions in aqueous media

- Batlokwa, Bareki Shima, Chimuka, Luke, Tshentu, Zenixole, Cukrowska, Ewa, Torto, Nelson

Authors: Batlokwa, Bareki Shima , Chimuka, Luke , Tshentu, Zenixole , Cukrowska, Ewa , Torto, Nelson
Date: 2012
Language: English
Type: Article
Identifier: vital:6566 , http://hdl.handle.net/10962/d1004125
Description: A double-imprinted polymer exhibiting high sensitivity for mercury(II) in aqueous solution is presented. Polymer particles imprinted with mercury(II) were synthesised by copolymerising the functional and cross-linking monomers, N’–[3– (Trimethoxysilyl)–propyl]diethylenetriamine (TPET) and tetraethylorthosilicate (TEOS). A double-imprinting procedure employing hexadecyltrimethylammonium bromide (CTAB), as a second template to improve the efficiency of the polymer, was adopted. The imprinted polymer was characterised by FTIR, scanning electron microscopy (SEM) and the average size determined by screen analysis using standard test sieves. Relative selective coefficients (k`) of the imprinted polymer evaluated from selective binding studies between Hg2+ and Cu2+ or Hg2+ and Cd2+ were 10 588 and 3 147, respectively. These values indicated highly-favoured Hg2+ extractions over the 2 competing ions. The results of spiked and real water samples showed high extraction efficiencies of Hg2+ ions, (over 84%) as evaluated from the detected unextracted Hg2+ ions by ICP-OES. The method exhibited a dynamic response concentration range for Hg2+ between 0.01 and 20 μg/mℓ, with a detection limit (LOD, 3σ) of 0.000036 μg/mℓ (36 ng/ℓ) that meets the monitoring requirements for the USA EPA of 2 000 ng/ℓ for Hg2+ in drinking water. Generally, the data (n=10) had percentage relative standard deviations (%RSD) of less than 4%. Satisfactory results were also obtained when the prepared sorbent was applied for the pre-concentration of Hg2+ from an aqueous certified reference material. These findings indicate that the double-imprinted polymer has potential to be used as an efficient extraction material for the selective pre–concentration of mercury(II) ions in aqueous environments.
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Date Issued: 2012

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Factors affecting ethical judgement of South African chartered accountants

- Maree, Kevin W, Radloff, Sarah E

Authors: Maree, Kevin W , Radloff, Sarah E
Date: 2007
Subjects: To be catalogued
Language: English
Type: Article
Identifier: vital:6073 , http://hdl.handle.net/10962/d1001647 , ISSN 1022-2529 , http://0-dx.doi.org.wam.seals.ac.za/10.1108/10222529200700001
Description: The start of the twenty-first century was marred by a spate of company collapses that involved fraudulent accounting activity. In many cases, company executives, many of whom belonged to the accounting profession, perpetrated the fraud. As a result, internationally, the accounting profession has suffered an enormous loss of goodwill, and its reputation as a profession with integrity has been severely harmed. Accounting professionals are no longer accorded the high regard they commanded in the past. The consequences for the profession have been far-reaching: accounting now faces a long, uphill battle to restore its reputation and to regain the trust of the international business community. This study replicates two famous international studies in the South African context. The focus of the study was to establish whether factors such as the Code of Professional Conduct of the South African Institute of Chartered Accountants (SAICA), the corporate ethical environment and their age influence the ethical judgement of individual accountants. The first such study was conducted in the United States of America (USA), and it was followed by similar research in Turkey. The results of these two studies suggested very different factors that could influence accountants' ethical judgement. The study reported in this article investigated South African chartered accountants; and its results were similar to those obtained in the US study.
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Date Issued: 2007

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African herbal medicines in the treatment of HIV: Hypoxis and Sutherlandia: an overview of evidence and pharmacology

- Mills, Edward, Cooper, Curtis, Seely, Dugald, Kanfer, Isadore

Authors: Mills, Edward , Cooper, Curtis , Seely, Dugald , Kanfer, Isadore
Date: 2005
Language: English
Type: Article
Identifier: vital:6401 , http://hdl.handle.net/10962/d1006337
Description: In Africa, herbal medicines are often used as primary treatment for HIV/AIDS and for HIV-related problems. In general, traditional medicines are not well researched, and are poorly regulated. We review the evidence and safety concerns related to the use of two specific African herbals, which are currently recommended by the Ministry of Health in South Africa and member states for use in HIV: African Potato and Sutherlandia. We review the pharmacology, toxicology and pharmacokinetics of these herbal medicines. Despite the popularity of their use and the support of Ministries of Health and NGOs in some African countries, no clinical trials of efficacy exist, and low-level evidence of harm identifies the potential for drug interactions with antiretroviral drugs. Efforts should be made by mainstream health professionals to provide validated information to traditional healers and patients on the judicious use of herbal remedies. This may reduce harm through failed expectations, pharmacologic adverse events including possible drug/herb interactions and unnecessary added therapeutic costs. Efforts should also be directed at evaluating the possible benefits of natural products in HIV/AIDS treatment.
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Date Issued: 2005

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Photophysicochemical and fFluorescence quenching studies of benzyloxyphenoxy substituted zinc phthalocyanines

- Durmuş, M, Nyokong, Tebello

Authors: Durmuş, M , Nyokong, Tebello
Date: 2008
Language: English
Type: Article
Identifier: vital:6570 , http://hdl.handle.net/10962/d1004133
Description: Photochemical and photophysical measurements were conducted on peripheral and non-peripheral tetrakis- and octakis(4-benzyloxyphenoxy)-substituted zinc phthalocyanines (1, 2 and 3). General trends are described for photodegradation, and fluorescence quantum yields, triplet lifetimes and triplet quantum yields as well as singlet oxygen quantum yields of these compounds in dimethylsulphoxide (DMSO) and toluene. The fluorescence of the complexes is quenched by benzoquinone (BQ), and fluorescence quenching properties are investigated in DMSO and toluene. The effects of the solvents on the photophysical and photochemical parameters of the zinc(II) phthalocyanines (1, 2 and 3) are also reported. Photophysical and photochemical properties of phthalocyanine complexes are very useful for PDT applications.
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Date Issued: 2008

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Validation of University of New Brunswick Ionospheric Modeling Technique with ionosonde TEC estimation over South Africa

- Moeketsi, D M, McKinnell, Lee-Anne, Combrinck, W L

Authors: Moeketsi, D M , McKinnell, Lee-Anne , Combrinck, W L
Date: 2009-09-01
Language: English
Type: Article
Identifier: vital:6809 , http://hdl.handle.net/10962/d1004302
Description: For more than a decade, ionospheric research over South Africa has been carried out using data from ionosondes geographically located at Madimbo (28.38°S, 30.88°E), Grahamstown (33.32°S, 26.50°E), and Louisvale (28.51°S, 21.24°E). The objective has been modelling the bottomside ionospheric characteristics using neural networks. The use of Global Navigation Satellite System (GNSS) data is described as a new technique to monitor the dynamics and variations of the ionosphere over South Africa, with possible future application in high frequency radio communication. For this task, the University of New Brunswick Ionospheric Modelling Technique (UNB-IMT) was applied to compute midday (10:00 UT) GNSS-derived total electron content (GTEC). GTEC values were computed using GNSS data for stations located near ionosondes for the years 2002 and 2005 near solar maximum and minimum, respectively. The GTEC was compared with the midday ionosonde-derived TEC (ITEC) measurements to validate the UNB-IMT results. It was found that the variation trends of GTEC and ITEC over all stations are in good agreement and show a pronounced seasonal variation for the period near solar maximum, with maximum values ( 80 TECU) around autumn and spring equinoxes, and minimum values ( 22 TECU) around winter and summer. Furthermore, the residual ΔTEC = GTEC − ITEC was computed. It was evident that ΔTEC, which is believed to correspond to plasmaspheric electron content, showed a pronounced seasonal variation with maximum values ( 20 TECU) around equinoxes and minimum ( 5 TECU) around winter near solar maximum. The equivalent ionospheric and total slab thicknesses were also computed and comprehensively discussed. The results verified the use of UNB-IMT as one of the tools for future ionospheric TEC research over South Africa.
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The role of non-timber forest products in household coping strategies in South Africa: the influence of household wealth and gender

- Paumgarten, Fiona, Shackleton, Charlie M

Authors: Paumgarten, Fiona , Shackleton, Charlie M
Date: 2011
Language: English
Type: Article
Identifier: vital:6648 , http://hdl.handle.net/10962/d1006897
Description: The prevalence and ranking of non-timber forest products (NTFPs) as safety-nets has been well discussed, but rarely quantified. We report on group discussions and household interviews in two South African villages to assess the frequency and nature of shocks and stresses over a 2-year period and the coping strategies employed, stratified by household wealth and gender of the de jure household head. Overall, kinship was the most widely adopted coping strategy, and NTFPs were the fifth most prevalent (employed by 70% of households). There were relatively few differences in the nature of shocks or responses between male- and female-headed households. Wealth influenced the experience of shocks or stresses as well as responses. Poorer households have fewer options with the increased use or sale of NTFPs being the second most commonly adopted strategy. Increased use and sale of NTFPs is a common manifestation of the safety-net function. To reconcile long-term economic development and biodiversity conservation, it is important to understand people’s use of natural resources and the factors that affect this use, including their responses to shocks and stresses.
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Date Issued: 2011

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Chris McGregor

- Atkins, Ronald

Authors: Atkins, Ronald
Subjects: McGregor, Chris -- 1936-1990 , Brotherhood of Breath (Musical group) , Jazz , Jazz musicians , Queen Elizabeth Hall
Language: English
Type: Article
Identifier: vital:13477 , http://hdl.handle.net/10962/d1001399 , McGregor, Chris -- 1936-1990 , Brotherhood of Breath (Musical group) , Jazz , Jazz musicians , Queen Elizabeth Hall
Description: Photocopied article from the newspaper The Guardian about a concert by Chris McGregor's Brotherhood of Breath at the QEH (Queen Elisabeth Hall), London, England.
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Efficacy of solar power units for small-scale businesses in a remote rural area, South Africa

- Hajat, A, Banks, D, Aiken, R, Shackleton, Charlie M

Authors: Hajat, A , Banks, D , Aiken, R , Shackleton, Charlie M
Date: 2009
Language: English
Type: Article
Identifier: vital:6636 , http://hdl.handle.net/10962/d1006860
Description: Much work has considered the practicalities and affordability of solar systems for domestic energy supplies in remote rural areas. There is less understanding of its utility for small-scale business enterprises in such areas. We examined the patterns of use of two 12 V and one 24 V systems for small-scale enterprises housed in transportable containers. Monitoring of load shed and top of charge indicated that the 12 V systems were inadequate to meet the requirements of the enterprises. The 24 V operation performed a lot better. Despite some technical limitations the system offered a number of social, economic and environmental positives; primarily the offering of business products not otherwise available in the area, incomes to the entrepreneurs and greater connectivity with regional centres through office services such as cell-phone charging and faxing. Customers of the small-scale enterprises felt that their presence in the area saved them some money because they no longer had to travel as frequently to regional urban centres.
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Date Issued: 2009

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