Author:Babajide, O; Petrik, L; Amigun, B; Ameer, FDate:Oct 2010Biodiesel has attracted increasing interest and has proved to be a good substitute for fossil-based fuels due to its environmental advantages and availability from renewable resources such as refined and waste vegetable oils. Several studies ...Read more
Author:Woodborne, S; Vogel, JCDate:Oct 1997Deal with infrared-stimulated luminescence and thermoluminescence dates from Rose Cottage Cave in South Africa. Discrepancy between luminescence and radiocarbon dates; Concentration of radioactive elements in sediments before and after leaching ...Read more
Author:Mhlongo, Gugu H; Dhlamini, MS; Ntwaeaborwa, OM; Swart, HC; Hillie, KTDate:Feb 2014Luminescence properties of Pr(sup3+) single doped SiO2 and Pr(sup3+) co-doped SiO(sub2):Tb(sup3+)/Eu(sup3+) nanophosphors synthesized using sol–gel method were investigated. X-ray diffraction (XRD), and scanning electron microscope (SEM) were ...Read more
Author:Raleaooa, PV; Roodt, A; Mhlongo, Gugu H; Motaung, David E; Kroon, RE; Ntwaeaborwa, OMDate:Feb 2017The structure, particle morphology, optical and magnetic properties of ZnO, ZnS and ZnO-ZnS nanoparticles prepared by the sol-gel method are reported. ZnO and ZnS were combined at room temperature by an ex situ synthetic route to prepare ...Read more
Author:Naidoo, Laven; Main, Russell S; Cho, Moses A; Madonsela, Sabelo; Majozi, Nobuhle, PDate:Jan 2022Maize has been identified as a strategic commodity for the reduction of poverty and enhancement of food security in the African continent. Climate variability and difficult economic conditions are pressuring farmers to produce higher (maize) ...Read more
Author:Machaka, RonaldDate:Feb 2021“The answer to the question “why HEAs exhibit such exceptional properties” lies in their phases” [1]. The implementation of machine learning (ML) approaches for the classification of solid solution high-entropy alloy (HEA) phases is, therefore, ...Read more
Author:Edwards, AL; Franz, RMDate:Mar 2009Noise-induced hearing loss (NIHL) can be prevented, but only by incorporating more proactive and innovative measures into our NIHL-prevention programmes. At present, direct and indirect costs to the mining industry resulting from occupational ...Read more
Author:Richter, PW; Thomas, ME; Van Deventer, TDate:Aug 1999Solid freeform fabrication is a recent technology by which prototype devices can be manufactured layer by layer under computer control. This allows the production not only of individual devices of complex shape, but also objects with an ...Read more
Author:Thomas, ME; Richter, PW; Van Deventer, T; Crooks, J; Ripamonti, UDate:Aug 1999An improved strategy is described for the manufacture of macroporous hydroxyapatite bioceramics for bone substitute applications. This is based on a modified fugitive phase technique, which allows production of relatively open, high-strength ...Read more
Author:Chigondo, M; Paumo, HK; Bhaumik, M; Pillay, K; Maity, ArjunDate:Feb 2019Magnetic arginine-functionalized polypyrrole (Fe3O4@Arg-PPy) nanocomposite was fabricated by in-situ polymerisation of pyrrole (Py) monomer in the presence of arginine and Fe3O4 nanoparticles for toxic chromium(VI) ions removal from simulated ...Read more
Author:Hato, MJ; Choi, HJ; Sim, HH; Park, BO; Ray, SSDate:Feb 2011Soft magnetic carbonyl iron (CI) based magnetorheological (MR) fluids containing three different loadings of submicron-sized organoclay were prepared. The MR characteristics were measured via rotational and oscillatory tests, in which the ...Read more
Author:Roul, BK; Mishra, DK; Ray, M; Sahu, DR; Mishra, PK; Srinivasu, VV; Pradhan, AKDate:May 2009Micron size Fe3O4 powders were chemically prepared and processed by radio frequency (13.56 MHz) oxygen plasma irradiation technique at different elevated temperatures using low radio frequency (RF) power level. Low magnetic field RF superconducting ...Read more
Author:Akande, AA; Rammutla, KE; Moyo, T; Osman, NSE; Nkosi, SS; Jafta, CJ; Mwakikunga, Bonex WDate:Feb 2015We report on the magnetic property of 0.67–WO3+0.33–VOx mixture film deposit on the corning glass substrate using the chemical sol–gel and atmospheric pressure chemical vapour deposition (APCVD) methods. The XRD and Raman spectroscopy confirm ...Read more
Author:Goedhals-Gerber, LL; Stander, C; Van Dyk, FEDate:Aug 2017South Africa is among the top 10 fruit-exporting countries in the world. The South African fruit industry has identifi ed temperature breaks along the fruit export cold chain that result in the deterioration of fruit quality, loss of market ...Read more
Author:Konrad, T; Uys, HDate:Jan 2012Unsharp measurements allow the estimation and tracking of quantum wave functions in real time with minimal disruption of the dynamics. Here we demonstrate that high-fidelity state monitoring, and hence quantum control, is possible, even in ...Read more
Author:Nelles, EM; Dewar, J; Bason, ML; Taylor, JRNDate:May 2000The pasting of commercial maize starches was found to be a biphasic phenomenon, exhibiting an expected first viscosity peak as well as an unexpected, relatively large second viscosity peak under specific cooking conditions when using a Rapid ...Read more
Author:Oboirien, BO; Thulari, V; North, Brian CDate:Sep 2014This paper presents a detailed study on the effect of temperature on the concentration of 27 major and trace elements in bottom ash generated from oxy fuel-combustion. The major elements are Na, Mg, Al, K, Ca and Fe and the minor and trace ...Read more