Author:Turton, A; Earle, A; Drackner, MDate:Feb 2009As part of a global survey to evaluate the impacts of megaconferences in the water sector conducted by the Third World Centre for Water Management in Mexico, the African Water Issues Research Unit was commissioned to undertake a regional ...Read more
Author:John, Maya J; Anandjiwala, R; Oksman, K; Mathew, APDate:Apr 2012Bio-based continuous fibers were processed from polylactic acid (PLA) and cellulose nanowhiskers (CNWs) by melt spinning. Melt compounding of master batches of PLA with 10 wt % CNWs and pure PLA was carried out using a twin-screw extruder in ...Read more
Author:Kilinkissa, OEY; Báthori, NB; Govender, KrishnaDate:Mar 2020The impact of chirality is assessed via comparison of structural features and properties of binary cocrystals. 4,4'-Bipyridine and 1,2-bis(4-pyridyl)ethane were combined with achiral, racemic mixture or pure enantiomers of selected carboxylic ...Read more
Author:Van der Merwe, SW; Groenwold, AA; Loveday, Philip W; Thiart, GDDate:Jan 2010The valveless micropump holds great potential for the biomedical community in applications such as drug delivery systems, blood glucose monitoring, and many others. In this paper, the authors investigate the characteristics of a planar ...Read more
Author:Makitla, IDate:Nov 2014The proliferation of mobile phones in developing countries such as South Africa has been revolutionary. This might have sufficed to address the issues of digital divide but not the digital difference. The latter means that not all these mobile ...Read more
Author:Somerset, VSDate:May 2010Organophosphate and carbamate pesticides are powerful neurotoxins that impede the activity of cholinesterase enzyme leading to severe health effects. This study firstly reports the development, characterisation, and application of thick-film ...Read more
Author:Williams, CR; Leaner, LJ; Somerset, VS; Nel, JMDate:Feb 2011A mercury (Hg) processing plant previously operating in KwaZulu-Natal Province (South Africa) discharged Hg waste into a nearby river system causing widespread contamination since the 1980s. Although the processing plant ceased operation in ...Read more
Author:Williams, CR; Leaner, JL; Nel, JM; Somerset, VSDate:Sep 2010Total mercury (TotHg) and methylmercury (MeHg) concentrations were determined in various environmental compartments collected from water resources of three Water Management Areas (WMAs) - viz. Olifants, Upper Vaal and Inkomati WMAs, potentially ...Read more
Author:Kading, TJ; Mason, RP; Leaner, JJDate:2009Mercury deposition histories have been scarcely documented in the southern hemisphere. A sediment core was collected from the ecologically important estuarine floodplain of the Berg River (South Africa). The authors establish the concentration ...Read more
Author:Oosthuizen, MA; John, J; Somerset, VDate:2010The objective of this study is to establish whether a specific community in a gold mining area, with potentially associated small-scale gold mining activities, was exposed to mercury. The community was situated in Mpumalanga, where some ...Read more
Author:Matooane, MDate:Mar 2010South Africa is considered one of the major contributors to global Hg emissions into the atmosphere mainly due to coal-based power generation. Exposure to Hg occurs through the inhalation of Hg vapours, or ingestion of Hg-contaminated food ...Read more
Author:Matooane, M; Oosthuizen, RDate:Nov 2009This presentation highlights the toxic effects that over-exposure to mercury (Hg) might have on human health. This includes blindness, deafness, cerebral palsy, mental problems and abnormal reflexes and muscle tone. Hg emissions increasing ...Read more
Author:Watson, BP; Ryder, JA; Kataka, MO; Kuijpers, JS; Leteane, FPDate:Aug 2008The Bushveld platinum group metal deposits are two distinct, shallow-dipping stratiform tabular orebodies and strike for many hundreds of kilometres. Mining is extensive, with depths ranging from close-to-surface to 2 000 m. The mining method ...Read more
Author:Jerling, HL; Weerts, Steven PDate:Mar 2018The Kosi coastal lake system, a chain of four interconnected basins, is located in the subtropical north-eastern corner of South Africa. Little information is available on zooplankton of the system and the main aim of this study is to report ...Read more
Author:Nhemachena, C; Chakwizira, JDate:01 Sep 2010Changes in climate and climate variability significantly affect the fundamentals of human health, most notably ecosystems, availability of fresh water, food quantity and quality. The occurrence and distribution of some infectious diseases and ...Read more
Author:Cooper, Antony KDate:Apr 2014This presentation provides an overview of a meta-language for land use classification. It also explains why land use can’t always be determined from imagery, and why land use is not the same as land cover, zoning or planning - though they ...Read more
Author:Salmon, BP; Kleynhans, W; Van den Bergh, F; Olivier, JC; Marais, WJ; Wessels, Konrad JDate:Jul 2011Time series derived from the first two spectral bands of the MODerate-resolution Imaging Spectroradiometer (MODIS) land surface reflectance product can be modelled as a pair of triply (mean, phase and amplitude) modulated cosine functions. ...Read more
Author:Madala, NE; Steenkamp, PA; Piater, LA; Dubery, IADate:Oct 2013Plants have developed biochemical and molecular responses to adapt to different stress environments. One of the characteristics of the multi-component defence response is the production of defence-related metabolites. Plant defences can be ...Read more
Author:James, TJ; Tugizimana, F; Steenkamp, PA; Dubery, IADate:Apr 2013Centella asiatica is an important source of biologically active pentacyclic triterpenoids. The enhancement of the biosynthesis of the centellosides by manipulation of associated metabolic pathways is receiving much attention. Jasmonates play ...Read more
Author:Mhlongo, MI; Piater, LA; Steenkamp, Paul A; Madala, NE; Dubery, IADate:Jan 2015Previous studies suggest that only transisomers of chlorogenic acid (CGA) are naturally produced. Cis-isomers have been noted in some plant tissues exposed to different mechanical processes as well as untreated tobacco leaves exposed to ...Read more