Author:Nyadongo, ST; Pityana, Sisa L; Olakanmi, EODate:Jul 2021It is anticipated that laser cladding assisted with preheat (LCAP)-deposited Tribaloy (T-800) composite coatings enhances resistance to structural degradation upon exposure to elevated-temperature oxidation service environments. The oxidation ...Read more
Author:Smart, SM; Fawcett, SE; Thomalla, Sandy J; Weigand, MA; Reason, CJC; Sigman, DMDate:Apr 2015We report wintertime nitrogen and oxygen isotope ratios (δ15N and δ18O) of seawater nitrate in the Southern Ocean south of Africa. Depth profile and underway surface samples collected in July 2012 extend from the subtropics to just beyond the ...Read more
Author:Harmer, RE; Farrow, DDate:Apr 1995Many geochronological studies on silicic magmatic rocks associated with the Bushveld Complex (rhyolitic lavas of the Rooiberg Group and granites of the Lebowa Granite Suite) have shown evidence of open-system behaviour of the Rb-Sr and Pb-Pb ...Read more
Author:Oosthuizen, R; Matooane, M; Wright, C; Phala, NDate:Aug 2012The West Rand is part of the Gauteng Province and is surrounded by mining activities. There have been several media and scientific reports about acid mine drainage (AMD) in this area. However, AMD is not the only environmental problem faced ...Read more
Author:Van Deventer, Heidi; Apleni, PhilaniDate:Jun 2021This poster is related to the WRC 427 project and consists of two A0 posters. The first page shows the knowledge of wetlands we currently have, recognising that there are different wetland types. We are concerned about the degradation and ...Read more
Author:Owen, GR; Stoychev, Stoyan H; Achilonu, I; Dirr, HWDate:Mar 2013JNK1 is activated by phosphorylation of the canonical T183 and Y185 residues, modifications that are catalysed typically by the upstream eukaryotic kinases MKK4 and MKK7. Nonetheless, the exact sites at which the most abundant JNK variant, ...Read more
Author:De Freitas, A; De Villiers, Johan P; Nel, Willem AJDate:Jun 2015A target of interest measured by a high range resolution radar may be modelled by multiple dominant points of reflections referred to as dominant scatterers. In this study a non-linear state space setting is used to model the states and ...Read more
Author:Slingsby, JA; De Buys, A; Simmers, ADA; Prinsloo, E; Forsyth, Gregory G; Glenday, J; Allsopp, NDate:Apr 2021The Jonkershoek Forestry Research Station was established in the Mediterranean climate region of South Africa in 1935 to implement a multiple catchment experiment to determine the effects of afforestation on water yield. The experiment consists ...Read more
Author:Burger, L; Forbes, ADate:Aug 2008The authors apply a new method of modeling Porro prism resonators, using the concept of rotating loss screens, to study stable and unstable Porro prism resonator. They show that the previously observed petal–like modal output is in fact only ...Read more
Author:Mokhothu, Thabang H; Guduri, BR; Luyt, ASDate:Dec 2011In this study the morphology and properties of a biodegradable aliphatic–aromatic copolyester mixed with kenaf fiber were investigated. Untreated kenaf fiber, as well as kenaf fiber treated with NaOH, and with NaOH followed by silane coupling ...Read more
Author:John, Maya J; Bellmann, C; Anandjiwala, RDDate:Oct 2010This paper presents an experimental study on the use of zein as a coupling agent in natural fibre composites. Kenaf nonwovens were treated with zein coupling agent, which is a protein extracted from corn. The surface characteristics of untreated ...Read more
Author:Butgereit, L; Botha, RA; Van den Heever, MDate:Jul 2012Different human languages look different from other human languages. To use a term from the computer industry, each human language has its own “look and feel”. European English speakers can easily recognise a phrase such as “Comment allez-vous?” ...Read more
Author:Mhlanga, N; Ray, SSDate:Jan 2015For decades, studies on drug-release kinetics have been an important topic in the field of drug delivery because they provide important insights into the mechanism of drug release from carriers. In this work, polylactide (PLA), doxorubicin ...Read more
Author:Salehiyan, Reza; Nofar, M; Ray, Suprakash S; Ojijo, Vincent ODate:Jul 2019This study illustrates the effects of the kinetic parameters [processing time, polyvinylidene fluoride (PVDF) viscosity, carbon nanotube (CNT) aspect ratio, and processing method] on the CNT migration and consequently the viscoelastic properties, ...Read more
Author:Masindi, Vhahangwele; Gitari, WM; Ngulube, TDate:Sep 2015In the present study, the defluoridation capabilities and adsorption mechanisms of cryptocrystalline magnesite were evaluated. All experiments were done by batch procedure. Conditions assessed include time, dosage, concentration, pH and the ...Read more
Author:Mashangoane, BF; Chirwa, EN; Mahlathi, Christopher DDate:May 2023Palladium is a rare platinum group metal concentrated in the Earth's core and mantle; because of its scarcity, its waste recovery and reuse options are economically appealing. Traditional strategies for extracting PGMs from effluents have a ...Read more
Author:Cambridge, GJ; Smith, R; Gush, Kim LDate:2008The Digital Doorway is a joint project between the South African Department of Science and Technology (DST) and the Meraka Institute, aimed at the promotion of computer literacy and associated skills in Africa. The assumption is that people ...Read more
Author:Coetzer, W; Moodley, D; Gerber, ADate:Nov 2014We modeled expert knowledge of arthropod flower-visiting behavioral ecology and represented this in an event-centric domain ontology, which we describe along with the ontology construction process. Two smaller domain ontologies were created ...Read more