Author:Gregory, MA; George, RC; Marshall, DJ; Anandraj, A; McClurg, TPDate:Jan 1999This study investigated the possibility that changes in the surface morphology of mussel (Perna perna) gill filaments may be used to indicate the relative toxicity of pollutants in the marine environment. Healthy, adult P. perna were collected ...Read more
Author:Fernandes, PJL; Jones, DRHDate:Sep 1997Liquid-metal-induced embrittlement under tensile test conditions is identified by the existence of a characteristic ductility trough. In this study, the effect of molten gallium on the behaviour of two brass alloys with different microstructures ...Read more
Author:Khawula, TNY; Raju, Kumar; Franklyn, PJ; Sigalas, I; Ozoemena, Kenneth IDate:Jul 2016Mesoporous molybdenum disulfide (MoS(sub2)) with different morphologies have been prepared via hydrothermal method using different solvents, water or water/acetone mixture. The MoS(sub2) obtained with water alone gave a graphene-like nanoflakes ...Read more
Author:Steyn, WJvdM; Visser, ATDate:2002The purpose of this paper is to indicate the effect that moving dynamic tyre loads has on the tyre-pavement contact stresses used in pavement analysis. Traditionally tyre loads (in pavement analysis) are modelled as constant loads applied ...Read more
Author:Robertson, GJ; Stoychev, Stoyan H; Sayed, Y; Achilonu, I; Dirr, HWDate:Mar 2017Glutathione S-transferase A3-3 is the most catalytically efficient steroid isomerase enzyme known in humans, transforming Δ5-androstene-3-17-dione into Δ4-androstene-3-17-dione. GSTA3-3 catalyzes this reaction with ten-fold greater efficiency ...Read more
Author:Skhosane, Besabakhe S; Tlotleng, Monnamme; Pityana, Sisa LDate:Mar 2020Laser surface treatment is widely used as an engineering technique due to its special characteristics and several advantages over other surface modification techniques. In the present study, elemental mechanically pre-alloyed powder consisting ...Read more
Author:De Beer, MorrisDate:1992This paper summarises some of the main effects of non-linear, ie stress stiffening (in this case) behaviour of resilient elastic moduli of typical granular base pavement structures on the calculated deflection basin. The basin was characterized ...Read more
Author:Sefara, Tshephisho JDate:Nov 2019Speech emotion recognition systems require features to be extracted from the speech signal. These features include Time, Frequency, and Cepstral-domain features. To normalise features, it is a challenging task to select an appropriate ...Read more
Author:Tjelele, TJ; Ward, D; Dziba, LEDate:Feb 2015Seed pods of Dichrostachys cinerea and Acacia nilotica have higher nutritive value than grasses and other browse plants during the dry season and form an important part of the diet of livestock. Seeds of Acacia may be destroyed during passage ...Read more
Author:Long, Craig S; Loveday, Philip W; Groenwold, AADate:Jan 2009The effects of selected planar finite element formulations, and their associated integration schemes, on the stiffness of a checkerboard material layout are investigated. Standard 4-node bilinear elements, 8- and 9-node quadratic elements, ...Read more
Author:Semete, B; Booysen, L; Kalombo, Lonji; Ramalapa, B; Hayeshi, R; Swai, HSDate:Mar 2012The surface of nanoparticles is often functionalised with polymeric surfactants, in order to increase systemic circulation time. This has been investigated mainly for intravenously administered nanoparticles. This study aims to elucidate the ...Read more
Author:Mathabathe, Maria N; Modiba, Rosinah; Bolokang, Amogelang SDate:Aug 2021The effect of Nb, Sn, Mn, and Si at a concentration of (0.3-2 at. %) on -TiAl based alloys’ preferential occupancy, interfacial energetics and mechanical properties were investigated by density functional theory (DFT) encompassed by the ...Read more
Author:Le Roux, Lukas JDate:Aug 2009Dye-sensitised solar cells (DSC) have attracted much attention during the last few years due to their high efficiencies and their potentially low production costs. The technology is based on a thin layer of nano sized, high band gap (3.2 eV) ...Read more
Author:Tjelele, J; Ward, D; Dziba, LDate:Feb 2015The increasing rate of woody plant encroachment in grasslands or savannas remains a challenge to livestock farmers. The causes and control measures of woody plant encroachment are of common interest, especially where it negatively affects the ...Read more
Author:Luus, FPS; Van den Bergh, F; Maharaj, BTJDate:Jun 2013Settlement classifiers for multitemporal satellite image analysis have to overcome numerous difficulties related to across-date variances in viewing- and illumination geometry. Shadow anisotropy is a prominent contributing factor in classifier ...Read more
Author:Davis, PC; Small, JCDate:1964A range of experiments was done to investigate the influence of the distance of the impeller from the bottom of the cell on the product yield and ash content of the products.Read more
Author:Luus, FPS; Van den Bergh, F; Maharaj, BTJDate:Jul 2012QuickBird imagery acquired on separate dates may have significant differences in viewing- and illumination geometries, which can negatively impact across-date settlement type classification accuracy. The effect of cast shadows on classification ...Read more
Author:Lategan, KL; Walters, Chavon R; Pool, EJDate:Jan 2019Silver nanoparticles (AgNPs) are commonly found in consumer products due to their antimicrobial properties. This study evaluated the effects of AgNPs on the murine macrophage cell line RAW 264.7 and human whole blood cell cultures (WBCs). ...Read more
Author:Vhengani, LM; Griffith, D; Lysko, MDate:Jul 2012Modulation Transfer Function (MTF) is a measure of the spatial resolution of an optical imaging system. For Earth Observation (EO) imaging systems in space, continuous MTF assessment is crucial for data quality. Several techniques of measuring ...Read more