Author:Khumalo, Mduduzi; Sithole, Bishop B; Tesfaye, TamratDate:May 2020Extraction of keratin from keratinous waste materials, such as chicken feathers, has been identified as the favourable approach in beneficiation of this biomass. The chemical extractions of keratin by reducing agents are usually preferred ...Read more
Author:De Lange, Willem J; Veldtman, R; Allsopp, MHDate:Aug 2013We assess the monetary value of forage provisioning services for honeybees as provided by an alien tree species in the Western Cape province of South Africa. Although Eucalyptus cladocalyx is not an officially declared invader, it is cleared ...Read more
Author:Pascual, U; Balvanera, P; Díaz, S; Pataki, G; O’Farrell, PatrickDate:Jun 2017Nature is perceived and valued in starkly different and often conflicting ways. This paper presents the rationale for the inclusive valuation of nature’s contributions to people (NCP) in decision making, as well as broad methodological steps ...Read more
Author:Page, D; Dillon, P; Toze, S; Bixio, D; Genthe, Bettina; Cisneros, BEJ; Wintgens, TDate:Mar 2010A quantitative microbial risk assessment C(QMRA) was performed at four managed aquifer recharge (MAR) sites (Australia, South Africa, Belgium, Mexico) where reclaimed wastewater and stormwater is recycled via aquifers for drinking water ...Read more
Author:Gummow, B; Bastianello, SS; Botha, CJ; Smith, HJC; Basson, AJ; Wells, BDate:Dec 1994An epidemiological investigation into an ''ill thrift'' problem occurring on a dairy farm adjacent to an alloy-processing unit, established that the probable cause of the problem was chronic vanadium poisoning. The disease manifested initially ...Read more
Author:Symes, CT; Woodborne, SMDate:Nov 2011The authors measured d13C and d15N isotope signatures in flight feathers of a White-bellied Sunbird to assess the value of using stable isotopes of feathers in avian dietary studies. Significant variation in d13C and d15N isotope values of ...Read more
Author:Makita, C; Madala, NE; Cukrowska, A; Abdelgadir, H; Chimuka, L; Steenkamp, Paul A; Ndhlala, ARDate:Sep 2017Recent evidence has shown that consumption of plants rich in phenolic compounds has health-promoting benefits. Amongst these plants, include Moringa oleifera Lam. (Moringaceae) which has gained significant attention due to its high contingency ...Read more
Author:Kemp, J; Lotter, Johanna M; Meyer, A; Kleinert, A; Pérez-Fernández, M; Valentine, ADate:May 2018We investigated the different functional strategies of N nutrition of cultivated and wild varieties of the legume Aspalathus linearis (N.L.Burm.) R.Dahlgren during wet and dry seasons in the Cape Floristic Region. The study addressed differences ...Read more
Author:Olbrich, BW; Le Roux, D; Poulter, AG; Bond, WJ; Stock, WDDate:01 Oct 1993This study aimed to determine whether the delta-C-13 levels in the foliage and twigs of four Eucalyptus grandis clones were related to their water use efficiency (WUE). This relationship has previously been demonstrated in a number of herbaceous ...Read more
Author:Nape, I; Mashaba, Nikiwe P; Mphuthi, N; Jayakumar, S; Bhattacharya, S; Forbes, AndrewDate:Mar 2021Vector beams are inhomogeneously polarized optical fields with nonseparable, quantum-like correlations between their polarization and spatial components, and hold tremendous promise for classical and quantum communication across various ...Read more
Author:Scott, L; Woodborne, SDate:2007Pollen analysis shed light on vegetation community structure over the last 23,000 year in the Western Cape. The pollen from dated hyrax faecal accumulations (hyraceum) relates to the evolution of climate and contributes to proxy records in ...Read more
Author:Lück-Vogel, Melanie; Rautenbach, K; Adams, J; Van Niekerk, Lara; Mbolambi, CikizwaDate:May 2016This paper examines the value of very high-resolution multispectral satellite imagery and LiDAR-derived digital elevation information for classifying estuarine vegetation types. Satellite images used are from the WorldView-2, RapidEye, and ...Read more
Author:Privette, JL; Tian, Y; Roberts, G; Scholes, RJ; Wang, Y; Caylor, KK; Frost, P; Mukelabai, MDate:Mar 2004The Kalahari Transect is one of several International Geosphere-Biosphere Programme (IGBP) transects designed to address global change questions at the regional scale, in particular by exploiting natural parameter gradients ( Koch et al., ...Read more
Author:Manzi, MSD; Hein, KAA; Durrheim, RJ; King, NDate:Feb 2014A model of the Ventersdorp Contact Reef (VCR) orebody at Kloof Gold Mine was derived by integrating 3D reflection seismic data with information derived from underground mine mapping and exploration drilling. The study incorporated the ...Read more
Author:Dye, PJ; Jacobs, SDate:17 May 2004The South African forestry industry perceives Process-based forestry models as important tools for improving predictions of growth and water use in forest plantations. The 3-PG process-based forest model was evaluated in South Africa using ...Read more
Author:Chetty, A; Kovács, J; Sulyok, Zs; Mészáros, A; Fekete, J; Domján, A; Szilágyi, A; Vargha, VDate:Jan 2013Poly(N-isopropylacrylamide-co-N,N"-methylene-bisacrylamide) (P(NIPAAm-co-MBA)) hydrogels were prepared in water using redox initiator. The copolymer composition at high conversion (> 95%) was determined indirectly by HPLC (high performance ...Read more
Author:Thackeray, MM; Rossouw, MH; De Kock, A; De la Harpe, AP; Gummow, RJ; Pearce, K; Liles, DCDate:15 Mar 1993Manganese dioxide has for many years found widespread use as a cathode material in aqueous Leclanche, zinc chloride and alkaline cells and, more recently, in nonaqueous lithium cells. However, despite the large number of polymorphic structures ...Read more
Author:Hakl, H; Le Roux, WHDate:Dec 2008Understanding airspace activity is essential for airspace control. Being able to detect vertical activity in aircraft allows prediction of aircraft intent, thereby allowing more accurate situation awareness and correspondingly more appropriate ...Read more
Author:Giddy, IS; Fer, I; Swart, S; Nicholson, Sarah-AnneDate:May 2023The seasonal warming of Antarctic Winter Water (WW) is a key process that occurs along the path of deep water transformation to intermediate waters. These intermediate waters then enter the upper branch of the circumpolar overturning circulation. ...Read more
Author:Govender, K; Alport, MJ; Mocke, G; Michallet, HDate:2002The cost-effective measurement of the velocity flow fields in breaking water waves, using particle and correlation image velocimetry, is described. The fluid velocities are estimated by tracking the motion of neutrally buoyant particles and ...Read more