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
Author:Zlobinsky, N; Johnson, D; Mishra, AK; Lysko, Albert ADate:Dec 2021Channel Assignment (CA) in wireless mesh networks (WMNs) has not been well studied in scenarios where the network uses Dynamic Spectrum Access (DSA). This work aims to fill some of this gap. We compare metaheuristic algorithms for optimising ...Read more
Author:Ozoemena, KI; Mamuru, SA; Fukuda, T; Kobayashi, N; Nyokong, TDate:Jun 2009Novel hexabutylsulphonyltribenzotetraazachlorin–fullerene (C60) complexes of iron (FeHBSTBTAC–C60) and cobalt (CoHBSTBTAC–C60) have been synthesized and their electrochemistry and oxygen reduction reaction (ORR) compared with their ...Read more
Author:Machaka, RonaldDate:Oct 2018While the metal injection moulding (MIM) of the precipitation-hardenable 17-4 PH stainless steel has found wide-ranging applications in a number of industries and popularity as a workhorse alloy, data on the as-sintered properties ‘that can ...Read more
Author:Mphahlele, N; Ozoemena, KI; Le Roux, Lukas J; Cele, LMDate:May 2011Dye solar cell (DSC) has become one of the attractive devices for the conversion of solar energy into electricity worldwide, because of their remarkable properties such as low cost, non-toxicity and easy to fabricate as compared to other ...Read more
Author:Mphahlele, NDate:Sep 2013This study reports the successful synthesis and integration of metallo-octacarboxyphthalocyanines-multi-walled carbon nanotubes (MOCPc-MWCNTs) (M = Zn, Ga(OH) and Si(OH)2) hybrid system for the application of dye solar cells. The metal ...Read more
Author:Mphahlele, NDate:Nov 2011This presentation investigates alternative photosensitisers used to enhance the performance and efficiency of dye solar cells. It looks at the synthesis, characterization and electrochemical evaluation of these dye solar cells.Read more