Author:Oelofse, Suzanna HHDate:20 Nov 2009This paper presents the information concerning the definition of waste. Discussing the importance of the clear definition, ongoing debates, broad definition of waste, problems with the broad definition, interpretation, current waste management ...Read more
Author:House, JI; Archer, S; Breshears, DD; Scholes, RJDate:Nov 2003The article aims to identify approaches to improve our understanding of, and predictive capability for, mixed tree-grass systems. Elucidation of the interactions, dynamics and determinants, and identification of robust generalizations that ...Read more
Author:Wellington, Kevin W; Ooi, HC; Benner, SADate:Apr 2009The syntheses of N,N'-dibenzyl-2,4-diaminopyrimidine-2'-deoxyribonucleoside and 1-methyl-2'- deoxypseudoisocytidine via Heck coupling are described. A survey of the attempts to use the Heck coupling to synthesize N,N'-dibenzyl-2,4-diaminopy ...Read more
Author:Motshekga, S; Kesavan Pillai, Sreejarani; Ray, SSDate:Mar 2011Carbon nanotubes decorated with SnO2 nanoparticles were prepared by conventional and microwave-assisted wet impregnation. The composites were thoroughly characterized by X-ray diffraction, Raman spectroscopy, BET-surface area measurement, ...Read more
Author:Das, Sonali; Gupta, R; Kaya, PADate:2010This paper analyzes whether the Law of One Price (LOOP) holds in the housing market of five metropolitan areas of South Africa, namely Cape Town, Durban, Greater Johannesburg, Port Elizabeth/Uitenhage and Pretoria. The authors test the existence ...Read more
Author:Tugizimana, F; Steenkamp, Paul A; Piater, LA; Dubery, IADate:Nov 2016Untargeted metabolomic studies generate information-rich, high-dimensional, and complex datasets that remain challenging to handle and fully exploit. Despite the remarkable progress in the development of tools and algorithms, the “exhaustive” ...Read morecb
Author:De Beer, Morris; Maree, JP; Liebenberg, L; Doucet, FJDate:Nov 2014The production of elemental sulphur and calcium carbonate (CaCO(sub3)) from gypsum waste can be achieved by thermally reducing the waste into calcium sulphide (CaS), which is then subjected to a direct aqueous carbonation step for the generation ...Read more
Author:Palaniyandy, Nithyadharseni; Nkosi, FP; Raju, Kumar; Ozoemena, KIDate:Jan 2019A simple and versatile approach has been implemented for the preparation of some manganese oxide (MnxOy)-based lithium-ion battery anode materials from low-cost electrolytic manganese dioxide (EMD). Depending on the additive, calcination ...Read more
Author:Van Zyl, WH; Lodolo, EJ; Gericke, MDate:Apr 1993A simple method was developed for the conversion of homothallic Saccharomyces cerevisiae yeast strains to heterothallism through HO gene disruption. An integrative ho=neo disrupted allele was constructed by cloning a dominant selectable marker, ...Read more
Author:Van Zyl, WH; Lodolo, EJ; Gericke, MDate:Apr 1993A simple method was developed for the conversion of homothallic Saccharomyces cerevisiae yeaststrains to heterothallism through HO gene disruption. An integrative ho:: neo disrupted allele was constructed by cloning a dominant selectable ...Read more
Author:Nicolaides, CP; Stotijn, CJ; Van der Veen, ERA; Visser, MSDate:24 Sep 1993Over the resin catalyst Amberlyst 15, and under our reaction conditions, the yield of MTBE (methyl tert-butyl ether), from the reaction of methanol and isobutene, is at a maximum in the temperature rang of 40-60-degrees-C. Slightly higher ...Read more
Author:Musyoka, Nicholas M; Missengue, R; Kusisakana, M; Petrik, LFDate:Aug 2014Clays obtained from South Africa were used as feedstock materials for the synthesis of zeolites. The conventional alkaline hydrothermal treatment of the starting material (90 °C for 8 h)was preceded by a fusion step (550 °C for 1.5 h) to ...Read more
Author:Missengue, RNM; Losch, P; Musyoka, Nicholas M; Louis, B; Pale, P; Petrik, LFDate:Mar 2018Characteristics of ZSM-5 synthesized from H2SO4-treated coal fly ash and fused coal fly ash extracts are compared in this study. In the synthesis process, fused coal fly ash extract (without an additional silica source) was used in the synthesis ...Read more
Author:Scholes, RJDate:Dec 2003The relationship between grass production and the quantity of trees in mixed tree-grass ecosystems (savannas) is convex for all or most of its range. In other words, the grass production declines more steeply per unit increase in tree quantity ...Read more
Author:Mabaso, Matsilele A; Withey, Daniel J; Twala, BDate:Aug 2019This paper developed and evaluated a method for the detection of spots in microscopy images. Spots are subcellular particles formed as a result of biomarkers tagged to biomolecules in a specimen and observed via fluorescence microscopy as ...Read more
Author:Gololo, KV; Majozi, TDate:Sep 2010Cooling water systems are generally designed with a set of heat exchangers arranged in parallel. This arrangement results in higher cooling water flowrate and low cooling water return temperature thus reducing cooling tower efficiency. Previous ...Read more
Author:Mirumachi, N; Van Wyk, EDate:Mar 2010Theory on environmental governance and water governance emphasises decentralised, devolved forms of interaction between stakeholders. As previously excluded actors are empowered to take part in governance, new forms of cooperation are created. ...Read more
Author:Muswema, Aubrey P; Okem, A; Blottnitz, H; Oelofse, Suzanna HHDate:Oct 2018In post-apartheid South Africa, cooperatives appear to be the government’s SMME model for driving job creation. Unfortunately, the mortality rates of cooperatives in all sectors is very high with a reported 12% survival rate of cooperatives ...Read more
Author:Muswema, Aubrey P; Okem, A; Blottnitz, H; Oelofse, Suzanna HHDate:Oct 2018In post-apartheid South Africa, cooperatives appear to be the government’s SMME model for driving job creation. Unfortunately, the mortality rates of cooperatives in all sectors is very high with a reported 12% survival rate of cooperatives ...Read more
Author:Roux, FSDate:Nov 2013The study of optical vortices in stochastic optical fields involves various quantities, including the vortex density and topological charge density, that are defined in terms of local expectation values of the distributions of optical vortices. ...Read more