Author:Geldenhuys, CJDate:Dec 1997Commercial plantations in South Africa have been established mainly in grasslands adjacent to native forest which occur as small, scattered patches, restricted to valleys and scarps by regular fire-prone grasslands. Under storey vegetation ...Read more
Author:Möller, H; Govender, G; Stumpf, WEDate:Sep 2008The heat treatment cycles that are currently applied to semi-solid processed components are mostly those that are in use for dendritic casting alloys. These heat treatments are not necessarily the optimum treatments for non-dendritic ...Read more
Author:Moller, H; Govender, G; Stumpf, WEDate:Dec 2007International standards for aluminium alloys often permit significant fluctuations in the content of alloying elements. This allows metal suppliers more freedom in preparing these alloys. It is shown that the magnesium content of semisolid ...Read more
Author:Scholes, RJ; Scholes, MCDate:Sep 1998Nitric oxide (NO) reacts with hydrocarbons and carbon monoxide (CO) in the presence of sunlight to form ozone in the lower atmosphere. Tropospheric ozone can be harmful to plants and animals, and is usually regarded as a symptom of industrial ...Read more
Author:Ayele, M; Tesfaye, T; Alemu, D; Limeneh, M; Sithole, Bishop BDate:Sep 2020Recently, there has been a great deal of interest to circumvent the environmental problems associated with manufactured colouring agents by using natural dyes. This study focuses on extracting natural dyes from mango leave and mango peel and ...Read more
Author:Taljaard, Susan; Slinger, JH; Arabi, Sumaiya; Weerts, Steven P; Vreugdenhil, HDate:Oct 2020Rapid urbanization of the coast, growing global trade, stakeholder emancipation and ongoing depletion of natural resources mean that ports can no longer operate and develop without acknowledging and incorporating societal and environmental ...Read more
Author:Guduri, BBRDate:Dec 2006The influence of Hildegardia populofolia fabric content, fabric orientation, sodium hydroxide (NaOH) and silane coupling agent treatment on the surface properties of the fabric, mechanical and fracture properties of Hildegardia populifolia- ...Read more
Author:Balakrishnan, P; John, Maya J; Pothen, L; Sreekala, MS; Thomas, SDate:2016Fiber-reinforced polymer composite materials are fast gaining ground as preferred materials for construction of aircrafts and space crafts. In particular, their use as primary structural materials in recent years in several technology- ...Read more
Author:Gilgen, D; Williams, BG; MacPhail, C; Van Dam, CJ; Campbell, C; Ballard, RC; Taljaard, DDate:Sep 2001This paper presents the results of a cross-sectional biomedical and social survey, conducted in a major gold mining centre with a high prevalence of HIV infection. It also provides the baseline data for a comprehensive intervention programme. ...Read more
Author:Sefara, Tshephisho J; Rangata, Mapitsi RDate:Oct 2023Exaggerated news titles are used to deceive news readers and spread misleading information. This paper presents a new natural language processing (NLP) technique that identifies exaggerated news titles. The technique uses Jaccard similarity ...Read more
Author:Maharaj, VDate:Oct 2012In this presentation the author outlines the steps taken in developing a South African indigenous plant-based microbicide to prevent HIV infection in women.Read more
Author:John, Maya J; Thomas, SDate:Aug 2012The scarcity of natural polymers during the world war years led to the development of synthetic polymers like nylon, acrylic, neoprene, styrene-butadiene rubber (SBR) and polyethylene. The increasing popularity of synthetic polymers is partly ...Read more
Author:De Wit, MP; Swilling, M; Musango, JKDate:11 Aug 2008Cities in developing countries often have to face a multiplicity of external shocks that impact on their operations. These changes include increased rates of migration from the rural poor, natural resource shocks such as droughts, decreased ...Read more
Author:Weinert, HHDate:1980Naturally occurring materials, such as rock and soil, constitute a significant portion of the materials content and cost of a road. Most textbooks dealing with road construction materials, however, are mainly concerned with the manufactured ...Read more
Author:Clauss, KADate:20 Feb 2009The book brings together the results of research spread over a number of reports and papers during the past 27 years and to create a guide for soil stabilization work. Its aim is to provide sufficient knowledge of soil/lime reactions to make ...Read more