Author:Pelly, SC; Parkinson, CJ; Van Otterlo, WAL; De Koning, CBDate:09 Dec 2005The metathesis reaction is used as a key step for the synthesis of the indolo [2,3-a] carbazole core of rebeccamycin 13 and the sulfur analog of furostifoline 21. Using the same methodology for the attempted synthesis of furostifoline, the ...Read more
Author:White, N; teWaterNaude, J; Van der Walt, A; Ravenscroft, G; Roberts, W; Ehrlich, RDate:Sep 2009Community concern about asthma prompted an epidemiological study of children living near a petrochemical refinery in Cape Town, South Africa. Because of resource constraints and the complexity of refinery emissions, neither direct environmental ...Read more
Author:Mathe, Ntombizodwa R; Scriba, Manfred R; Coville, NJDate:Nov 2014Bimetallic Pt nanoparticles were prepared by alloying Pt with the non-noble transition metals, Co and Ni, using a conventional heat-treatment (HT) method and microwaveirradiation (MW). The resulting samples were PteCo-Ht, PteNi-HT, PteCo, MW ...Read more
Author:Heyns, T; Heyns, PS; De Villiers, JPDate:Apr 2012Current haul road management techniques, such as routine, periodic and urgent maintenance have shortcomings in many complex haul road environments. Real-time road condition monitoring may significantly reduce maintenance costs, both to the ...Read more
Author:Venter, SN; Kuhn, AL; Harris, JDate:1998The increased threat of faecal pollution in recent years and the high priority of protecting human health by the government led to the initiation of a national microbial monitoring programme for surface water in South Africa. According to the ...Read more
Author:Brill, G; Anderson, P; O’Farrell, PatrickDate:May 2017This study contributes to both the methodological and empirical literature by developing an integrative approach to assessing temporal and spatial change in riparian ecosystem service delivery by drawing on available and diverse data sets. ...Read more
Author:Debba, Pravesh; Carranza, E; Stein, A; Van der Meer, FDate:Mar 2010This research describes a quantitive methodology for deriving optimal exploration target zones based on a probalistic mineral prospectivity map.The Rodalquilar mineral district is located in the Sierra del Cabo de Gata volcanic field, in the ...Read more
Author:Kruger, OADate:2000In angle calibrations the uncertainty contributions of the autocollimator and index table are easily estimated as these uncertainties are well documented, but it is more difficult to determine the uncertainties associated with flatness ...Read more
Author:Archibald, S; Nickless, A; Scholes, RJ; Schulze, RDate:Nov 2010In southern African savannas, grass production, and therefore the annual extent of fire, is highly dependent on rainfall. This response has repeatedly been noted in the literature but authors used different input variables and modelling ...Read more
Author:Du Plessis, Louw; Krüger, JJDate:Apr 2016The purpose of this article is to provide updated information by identifying and discussing methods, measures and indicators for evaluating benefits appropriate for transportation-related research facilities/programmes. The information has ...Read morecb
Author:Dludlu, MK; Oboirien, Bilainu; Sadiku, RDate:2017In this study, coal fly ashes (CFAs) from three different boiler sites in South Africa, Eskom (E coal fly ash), George Mukhari Academic Hospital (GMH coal fly ash), and KarboChem (KBC coal fly ash), were used to produce geopolymers. The coal ...Read more
Author:Mathekga, BSP; Nxumalo, Precious Z; Thimiri Govindaraj, Deepak BDate:Jan 2022In this book chapter, we elaborate on the state-of-the-art technology developments in high throughput screening, microfluidics and nanofluidics. This book chapter further elaborated on the application of microfluidics and nanofluidics for ...Read more
Author:Barros, E; Van Staden, C; Lezar, SDate:May 2009Fast-growing Eucalyptus grandis trees are one of the most efficient producers of wood in South Africa. The most serious problem affecting the quality and yield of solid wood products is the occurrence of end splitting in logs. Selection of ...Read more
Author:Staebe, K; Botes, M; Madlala, Tebogo E; Oberholster, Paul J; Cloete, TEDate:Dec 2018Freshwater resources in semi-arid countries are under constant threat from pollution. One of the major pollutants is acid mine drainage (AMD), which not only lowers the pH of the water, but contains high sulphuric acid and high metal ...Read more
Author:Thuku, RN; Brady, D; Benedik, MJ; Sewell, BTDate:Mar 2009The nitrilases are enzymes that convert nitriles to the corresponding acid and ammonia. They are members of a superfamily, which includes amidases and occur in both prokaryotes and eukaryotes. The superfamily is characterized by having a ...Read more
Author:Kfir, R; Franck, MDate:1995In this study the source of microbial pollution to a tidal pool was investigated. Both adjacent seawater which could contribute to possible faecal pollution and potential direct bather pollution were studied. The microbial quality of the ...Read more
Author:Le Rouw, Wouter J; Schaefer, Lisa M; Genthe, BettinaDate:Sep 2012The Olifants river has been described as one of the most environmentally polluted rivers in Southern Africa, particularly in the upper catchment. Untreated water from the catchment may be used for many purposes including irrigation, recreation, ...Read more
Author:Nchabeleng, T; Cheng, Po-Hsun; Oberholster, Paul J; Botha, A-M; Smit, WJ; Luus-Powell, WJDate:Dec 2014The effects of a decomposing cyanobacteria bloom on water quality and the accumulation of microcystin-LR equivalent toxin in fish at Loskop Dam were studied in May 2012. Enzyme-linked immunosorbent assay [ELISA] was used to confirm the presence ...Read more