Author:Lehutso, Raisibe F; Tancu, Yolanda; Maity, Arjun; Thwala, MelusiDate:Mar 2021Analytical limitations have constrained the determination of nanopollution character from real-world sources such as nano-enabled products (NEPs), thus hindering the development of environmental safety guidelines for engineered nanomaterials ...Read more
Author:Baisitse, TR; Forbes, A; Katumba, G; Botha, JR; Engelbrecht, JAADate:2008In this paper, infrared reflectance spectroscopy was employed to extract information on the optical and electrical properties of metal organic vapour phase epitaxial (MOVPE) grown InAs and InAsSb epilayers. These epitaxial layers were grown ...Read more
Author:Phokeer, A; Johnson, D; Densmore, MDate:Sep 2016The paper describes a measurement study of mobile Internet usage in township communities in South Africa. The idea is to understand usage pattern of mobile data that would motivate the provisioning of a localised cloudlet infrastructure with ...Read more
Author:Jayaramudu, J; Guduri, BR; Rajulu, AVDate:Mar 2010The new natural fabric Grewia tiliflia was extracted from its tree. This uniaxial fabric was analyzed by chemical, Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and polarized ...Read more
Author:Brady, D; Beeton, A; Zeevaart, J; Kgaje, C; Van Rantwijk, F; Sheldon, RADate:Mar 2004Bio-catalytic transformations converting aromatic and arylaliphatic nitriles into the analogous related amide or acid were investigated.These studies included synthesis of the beta-substituted nitrile 3-hydroxy-3-phenylpropionitrile, subsequent ...Read more
Author:Jele, TB; Sithole, Bishop B; Lekha, Prabashni; Andrew, Jerome EDate:May 2022In this study, three different pulp and paper mill sludge (PPMS) samples collected from different South African mills were chemically and physically characterised to investigate their suitability for various beneficiation pathways. The overall ...Read more
Author:Zondi, MC; Tekane, Yanga C; Magidimisha, Edwin; Wium, Elsmari; Gopal, Ajith K; Bemont, CDate:Sep 2017Infrared (IR) thermography is a technique used to measure temperature distribution of heat generation in manufacturing processes such as welding. IR thermography is a non-destructive and non-contact method, which makes it favoured for the arc ...Read more
Author:Timme, E; Walwyn, D; Bailey, ADate:May 2009Purple carotenoprotein containing astaxanthin as the prosthetic group was extracted from the carapace shells of Jasus lalandii. The material, with a molecular mass of around 400 000 Da and max 525nm (a-crustacyanin), was readily converted ...Read more
Author:Sanders, PJ; De Beer, Morris; du Plessis, HWDate:26 May 2009Various aspects of the determinations and use of elastic moduli of pavements materials are herein addressed. Included is an investigation into the sensitivity of pavement life to changes in elastic material parameters, an update of moduli ...Read more
Author:Gledhill, Irvy MA; Nordstrom, JDate:Sep 2011This study concludes that: 1. the energy equation is expressed in terms of translations and rotational acceleration, 2. the generalised enthalpy equation is similarly expressed, 3. but the meaning of these is still to be explored, 4. dimensionless ...Read more
Author:Frederick, J; Brady, D; Dirr, HDate:Oct 2006A versatile nitrile-degrading bacterium, Rhodococcus rhodochrous ATCC BAA-870, was isolated through enrichment culturing of soil samples from Johannesburg, South Africa. Useful nitrile-metabolising activity of a potential biocatalyst, Rhodococcus ...Read more
Author:Nthwane, Yvonne B; Tancu, Yolanda; Maity, Arjun; Thwala, MelusiDate:Apr 2019The application of titanium oxide engineered nanomaterials (TiO2 (sub 2) ENMs) in products is dominant in sunscreens and can be release into water systems with relative ease during sunscreen use. The current study examined the physico-chemical ...Read more
Author:Lovelock, HDL; Kinds, J; Young, PMDate:1998Fourteen commonly used commercially available, WC 12Co thermal spray powders were characterised in terms of their particle size distribution, surface morphology, cross-sectional morphology, and phase composition. Based on the results, four ...Read more
Author:Ngwenya, NS; Thambiran, TirushaDate:Oct 2014The City of Johannesburg (CoJ) is characterized by numerous industries ranging from heavy industries to the service provision industry. The aim of this study was to analyse the air quality risk in the CoJ within the context of the implementation ...Read more
Author:Grobler, Inus; Gitau, MNDate:Jun 2013High density high switching frequency power converter conducted EMC had been analysed, modelling the noise source and noise path, while providing accurate conducted EMC noise limits comparable to accredited noise measurements up to 100 MHz. ...Read more
Author:Grobler, Inus; Gitau, MNDate:Sep 2013High density high switching frequency power converter conducted EMC had been analysed, modelling the noise source and noise path, while providing accurate conducted EMC noise limits comparable to accredited noise measurements up to 100 MHz. ...Read more
Author:Olivier, Marius; Mostert, FJDate:Aug 2013A method to optimise the geometry, explosive charge mass and volume of an argon bomb for specific lighting requirements has been proposed. The method is specifically aimed at applications that require photographic diagnostics with ultra-high ...Read more
Author:Dudley, Angela L; Naidoo, Darryl; Forbes, ADate:Sep 2016We show how one can determine the various properties of light, from the modal content of laser beams to decoding the information stored in optical fields carrying orbital angular momentum, by performing a modal decomposition. Although the ...Read more
Author:Olivier, Marius; Mostert, FJ; Snyman, IMDate:2013The light output from Argon-bombs was investigated by means of ultra high speed photography (Cordin Model 550-32 camera) and locally developed photodiode sensors. Tubes of various sizes were inflated with Argon gas, and were detonated on one ...Read more