Author:Chhiba, Varsha P; Van der Westhuyzen, Christiaan W; Bode, M; Brady, DDate:Jun 2019Commercially, nitrilases are valuable biocatalysts capable of converting a diverse range of nitriles to carboxylic acids for the greener synthesis of chemicals and pharmaceuticals. Nitrilases are widespread in nature and are both important ...Read more
Author:van Zyl, PCDate:1966The present investigation was undertaken to determine whether bacteria, similar to those described in the literature, are also present in South African coal mines, and if so, to what extent they influence the oxidation of pyrites and the ...Read more
Author:Booysens, S; van Zyl, PCDate:1966This study concerns the use of a manometric method for the quantitative determination of the oxidation of ferrous sulphate, sulphur, thiosulphate and a sample of pyrites by Thiobacillus thio-oxidans, Thibacillus ferro-oxidans, Ferrobacillus ...Read more
Author:Du Plessis, JJL; Weiss, ES; Cashdollar, KLDate:May 2000The prime objective of this report was to evaluate single bag performance at various positions in the gallery when exposed to different explosions. These methane explosions varied in strength and position to generate varied explosion pulses ...Read more
Author:Meth-Cohn, O; Horak, RM; Fouché, GerdaDate:07 Jun 1994Alpha beta-Epoxy ketones on treatment with baker's yeast yield different types of products depending on their substitution. Small groups such as H or Me attached at the epoxy end protect that end from attack. Thus, 1-acyl epoxides with H, ...Read more
Author:Bolokang, AS; Phasha, MJ; Motaung, DEDate:Apr 2013Broadening and height reduction of X-ray diffraction peaks were observed after cold-pressing of unmilled Co-W pow- der mixture. It seems the effect of cold pressing has slightly reduced the lattice parameter of W from 3.165 to 3.143 Å. ...Read more
Author:Adebesin, F; Kotzé, Paula; Van Greunen, D; Foster, RDate:Jul 2013Although standardization is seen as the key to ensuring interoperability of healthcare information systems, the large numbers of standards available can make the selection decision difficult especially for a developing nation. This paper ...Read more
Author:Ntuli, Princess N; Mkhwebane, Sesie EDate:Nov 2018Renewable energy can be explained as energy that is derived from natural resources and processes, that are not depleted but replenished at a rate that is faster than the consumption thereof (International Energy Agency, 2018). This form of ...Read more
Author:Mkhwebane, Sesie EDate:Jun 2018Renewable energy can be explained as energy that is derived from natural resources and processes, that are not depleted but replenished at a rate that is faster than the consumption thereof (International Energy Agency, 2018).Read more
Author:Botha, Adèle; Herselman, Martha E; Rametse, S; Maremi, Keneilwe JDate:May 2017Teachers recognize the importance of integrating technology into their classroom practice and the endeavour has attracted much attention. Teacher Professional Development (TPD) initiatives have focused on enabling and supporting teachers. ...Read more
Author:Steyn, Maronel; Oberholster, PJDate:Dec 2021Sustainable development and the global move towards a more circular use of resources, where waste is reduced and resources are recycled, have caused a paradigm shift within the scientific community with regards to wastewater solutions. Nutrient ...Read more
Author:Pholotho, T; Mtsweni, Jabu SDate:May 2016Information and Communication Technologies (ICTs) are capable of expanding access to quality education, educational resources and provide teachers with new skills. Nevertheless, a majority of rural public schools have limited ICTs, mainly due ...Read more
Author:Strydom, Wilma FDate:Sep 2018A small percentage of South Africans regularly recycle most of their recyclables, which was only 4% and 7.2% in 2010 and 2015, respectively. This empirical quantitative study, the first study on this scale in South Africa, aimed to ascertain ...Read more
Author:Roux, Michael P; Lotter, S; Nordengen, Paul ADate:Jul 2015As part of the project to update the Malawian Directorate of Road Transport and Safety Services’ (DRTSS) 2005 Axle Load Control Strategy and to provide a five-year implementation plan, a country-wide axle load survey was undertaken to assess ...Read more
Author:Walters, Chavon R; Couto, M; McClurg, N; Silwana, B; Somerset, VDate:Feb 2017Mercury (Hg) speciation and bioavailability were studied in surface water, surface sediment and freshwater fish samples collected upstream and downstream of the Medupi (currently under construction) and Matimba power stations in the Waterberg ...Read more
Author:Strydom, WF; Godfrey, Linda KDate:Nov 2012This report presents the findings of a national research project undertaken in late 2010, before the requirements for source separation of recyclables under the National Environmental Management: Waste Act (NEM:WA) (RSA 2008) was implemented. ...Read more
Author:De Klerk, A; De Klerk, Arno RDate:Jul 2011A study was conducted in the Waterberg area to characterize the aquatic macro invertebrate community structure and fish assemblages in the Mokolo and Lephalala rivers prior to the onset of increased mining activities and coal fired power ...Read more
Author:Parmaliana, A; Frusteri, F; Mezzapica, A; Miceli, D; Scurrell, MS; Giordano, NDate:Sep 1993The partial oxidation of methane to formaldehyde by molecular oxygen on silica and silica-supported oxide catalysts has been investigated at a pressure of 1.7 bars in the temperature range 520-650°C by using a batch reactor with external ...Read more
Author:Matsebe, O; Namoshe, M; Tlale, NDate:2010The goal of the chapter is to provide an opportunity for researchers who are new to, or interested in, this exciting area of research with the basics, background information, major issues, and the state-of-the-art as well as future challenges ...Read more
Author:Foundation for Research Development, (Ecosystems section)Date:1985The Seminar on Basic Needs in Rural Areas was organized to provide an opportunity for interaction between researchers and decision-makers. Various aspects of basic needs in rural areas were covered. Papers delivered on the following topics ...Read more