Author:Giffen, MHDate:1975The diatom flora from several stations on the eastern shore of Saldanha Bay (South Africa) has been studied. Saldanha bay is situated on the western coast of South Africa 110Km north of Cape Town.Read more
Author:Hirschberg, G; Baradlai, P; Varga, K; Myburg, G; Schunk, J; Tilky, P; Stoddart, PDate:01 Mar 1999Formation, presence and deposition of corrosion product radionuclides (such as 60Co, 51Cr, 54Mn, 59Fe and/or 110mAg) in the primary circuits of water-cooled nuclear reactors (PWRs) throw many obstacles in the way of normal operation. During ...Read more
Author:Vogel, JC; Fuls, A; Visser, EDate:Sep 2002The artificial radiocarbon produced by the thermonuclear bomb tests in the 1950s and 1960s significantly increased the level of C-14 in the environment. A detailed record of the subsequent changes in the C-14 concentration of the atmosphere ...Read more
Author:McLaren, M; Sidderas-Haddad, E; Forbes, ADate:Sep 2011It is now well known that matter may be trapped by optical fields with high intensity gradients. Once trapped, it is then possible to manipulate microscopic particles using such optical fields, in so-called optical tweezers. Such optical ...Read more
Author:Mosangi, Damodar; Moyo, Lumbidzani; Kesavan Pillai, Sreejarani; Ray, Suprakas SDate:Oct 2016In this study, a pharmaceutically active ingredient, acetyl salicylic acid (ASA), was intercalated into ZnAl layered double hydroxide (LDH). The LDH–ASA nanohybrid material was characterized by XRD, FTIR, SEM, ICP-MS, TEM and TGA. Successful ...Read morecb
Author:Kumar, Neeraj; Fosso-Kankeu, E; Ray, Suprakas SDate:May 2019The development of new synthesis approaches for MoS2 is necessary to achieve controlled morphologies and unique physicochemical properties that can improve its efficiency in particular applications. Herein, a facile one-step hydrothermal route ...Read more
Author:Wright, CDate:Oct 2012Schools have a unique advantage to help curb the negative human health effects of excess personal sun exposure by providing a sun safe environment and promoting sun protection behaviour among children and adolescents.Read more
Author:Garland, Rebecca MDate:Feb 2012This article discusses the effects of acid mine drainage on human health. Skin irritation, kidney damage, neurological diseases are some of the human health effects.Read more
Author:Garland, Rebecca MDate:2011Acid Mine Drainage (AMD) has recently attracted lots of attention in South Africa, both in parliament and in the media. AMD is formed in the mine itself through a variety of chemical reaction pathways, before it enters the environment as ...Read more
Author:Vadapalli, VRK; Zvimba, JN; Mathye, M; Fischer, H; Bologo, LDate:Oct 2015This study investigated the implications of using two grades of limestone from a paper and pulp industry for neutralization of acid mine drainage (AMD) in a pilot sequencing batch reactor (SBR). In this regard, two grades of calcium carbonate ...Read more
Author:Brink, S; Dorfling, C; Aldrich, CDate:May 2016Relatively small rocks that detach from stope hanging walls during periods when miners are working in the vicinity pose a lethal risk, and contribute significantly to underground fatalities in the South African mining industry, totalling 89 ...Read more
Author:von Bergmann, HM; Forbes, A; Roberts, T; Botha, LRDate:Aug 2008Results are presented on the influence of acoustic waves on the performance of high-repetition-rate TEA CO2 lasers. It is shown that acoustic waves generated inside the laser cavity lead to nonuniform discharges, resulting in a deterioration ...Read more
Author:Van Reenen, Coralie A; Du Plessis, ChrisnaDate:Aug 2021This research set out to broaden the pool of evidence regarding the acoustic conditions at schools in South Africa. A review of local and international literature, standards and design guidelines shows that the ideal classroom acoustic ...Read more
Author:Du Plessis, CDate:Sep 2005Sustainable development, and by extension sustainable building, is an evolving concept that relies for its implementation on the development of regional and local approaches and solutions. There is, in particular, a split between the definitions, ...Read more
Author:Rosman, Benjamin S; Ramamoorthy, SDate:Apr 2015An agent tasked with solving a number of different decision making problems in similar environments has an opportunity to learn over a longer timescale than each individual task. Through examining solutions to different tasks, it can uncover ...Read more
Author:Wepener, V; Van Vuren, JHJ; Chatiza, FP; Mbizi, Z; Slabbert, L; Masola, BDate:2005This paper presents results from a field study in the Rietvlei Wetland system, Gauteng, South Africa using the freshwater mollusk and freshwater fish as bioindicator organisms. Active biomonitoring (ABM) exposures were conducted where organisms ...Read more
Author:Simpson, BRS; Van Wyngaardt, WMDate:2006Authors describe the activity measurements undertaken at the CSIR’s National Metrology Laboratory on a solution of the pure beta emitting Radio nuclide phosphorus-32 that formed part of an international key comparison. Depending on the ...Read more
Author:Simpson, BRS; Van Wyngaardt, WMDate:Oct 2006The absolute activities of the pure beta-emitters Sr-89 and Y-90 have been determined by a direct method, namely the triple-to-double coincidence ratio (TDCR) efficiency calculation technique. This undertaking has extended further the number ...Read more
Author:Afolayan, AJ; Wintola, OA; Fouché, GerdaDate:2016The acute and subacute toxicity profile of the aerial extract of Monsonia angustifolia in Wistar rats was evaluated. The Organization for Economic Cooperation and Development (OECD) 420 guideline was adopted in the acute toxicity testing with ...Read more
Author:Lukhele, LP; Mamba, BB; Musee, N; Wepener, VDate:Jan 2015This study investigated the toxicity of double walled carbon nanotubes (DWCNTs) to three aquatic organisms, namely, Pseudokirchneriella subcapitata, Daphnia pulex, and Poecilia reticulata under the influence of exposuremedia properties ...Read more