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: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: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: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:Motaung, DE; Makgwane, Peter R; Ray, SSDate:Jul 2015We report the chemical synthesis of various ZnO nanostructures and TiO2 nanoparticles and their dispersion in a P3HT matrix. The photoluminescence studies revealed improved charge transport in the active layer of the optimized TiO2 nanoparticles ...Read more
Author:Maake, Popoti J; Bolokang, Amogelang S; Arendse, CJ; Vohra, V; Iwuoha, EI; Motaung, DEDate:Sep 2020The integration of noble metals nanostructures can be an effective method to improve the performance of organic solar cells by scattering the incident light that reaches the active layer. The resulting elongated active optical trail span of ...Read more
Author:Ozoemena, KI; Stefan-van Staden, RI; Nyokong, TDate:Jul 2009Novel electrochemical sensors based on carbon paste impregnated with metallopthalocyanine (MPc, M¼Co, Fe) complexes, have been constructed for the assay of anti-HIV drug 2’,3’-dideoxyinosine (didanosine, DDI). Both modified electrodes showed ...Read more
Author:Mathoho, Ipfi; Akinlabi, ET; Arthur, Nana KK; Tlotleng, Monnamme; Masina, Bathusile NDate:Mar 2019This study investigated the effect of laser peening on the surface integrity (surface roughness, microstructure and microhardness) of 17-4 PH stainless steel components which were built through the direct energy deposition (DED). Additive ...Read more
Author:Langmi, Henrietta W; Ren, Jianwei; Musyoka, Nicholas MDate:Aug 2015Over the past decade, hydrogen storage in metal-organic frameworks (MOFs) has received increasing attention worldwide because they possess versatile structures, high surface areas, large free volumes, ultrahigh porosities, and tunable pore ...Read more