Author:Kesavan Pillai, Sreejarani; Moyo, Lumbidzani; Ray, Suprakas S; Scriba, Manfred RDate:Nov 2012Organically modified phyllosilicates (montmorillonite and palygorskite) using Arquad 2HT-75 surfactant were effectively synthesized utilizing a microwave irradiation technique. The microwave method was successfully used also for the surface ...Read more
Author:Jafta, CJ; Raju, Kumar; Mathe, Mahlanyane K; Manyala, N; Ozoemena, KIDate:Feb 2015A hybrid synthesis procedure, combining microwave irradiation and conventional annealing process, is described for the preparation of lithium-rich manganese-rich cathode materials, Li[Li0.2Mn0.54Ni0.13Co0.13]O2 (LMNC) and its aluminum-doped ...Read more
Author:Makgabutlane, B; Nthunya, LN; Nxumalo, EN; Musyoka, Nicholas M; Mhlanga, SDDate:Sep 2020Class F South African coal fly ash was used as a precursor for the synthesis of zeolite A via complete microwave irradiation. To attain optimal conditions for the synthesis of zeolite A with minimum impurities, the microwave synthesis time, ...Read more
Author:Motshekga, S; Kesavan Pillai, Sreejarani; Ray, Suprakas S; Krause, R; Jalama, KDate:01 Sep 2010Metal nanoparticles coated onto carbon nanotubes (CNTs) provide a way to obtain novel materials with useful properties for gas sensing and catalyst application. Metal oxides are well-known materials suitable for detecting a wide spectrum of ...Read more
Author:Sikhwivhilu, L; Ray, Suprakas SDate:01 Sep 2010Synthesis and engineering of the nanostructured semiconductors based on metal oxides have received considerable attention due to their unique physical and chemical properties, and their potential applications in industry and technology. While ...Read more
Author:Nkosi, FP; Jafta, CJ; Kebede, Mesfin A; Le Roux, Lukas J; Mathe, Mahlanyane K; Ozoemena, KIDate:Mar 2015Microwave irradiation at the pre- and post-annealing steps of the synthesis of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel cathode materials for rechargeable lithium ion battery is a useful strategy to optimize the average manganese ...Read more
Author:Rohwer, Mark B; Ozoemena, K; Modibedi, Remegia MDate:Nov 2012Fuel cells provide a means for the direct conversion of fuels to electricity. Direct alcohol fuel cells (DAFCs) are particularly attractive because liquid fuels such as methanol or ethanol have a relatively low cost, a high volumetric energy ...Read more
Author:Monchusi, BDate:Oct 2012As part of the ongoing development of novel mining methods, the CSIR has developed alternative methods to break rocks. In this case, we show the application of microwave energy to break narrow tabular ore bodies.Read more
Author:Oboirien, BO; North, Brian C; Sadiku, ERDate:Sep 2013Fluidised bed gasification (FBG) is a clean coal technology suitable for power and fuel generation from low grade coals. However, the resulting bottom ash presents some disposal challenges to the power plants and the environment. The production ...Read more
Author:Jafta, CJ; Mathe, Mahlanyane K; Manyala, N; Roos, WD; Ozoemena, KIDate:Aug 2013The LiMn1.5Ni0.5O4 spinel is an important lithium ion battery cathode material that has continued to receive major research attention because of its high operating voltage (∼4.8 V). This study interrogates the impact of microwave irradiation ...Read more
Author:Mathe, Ntombizodwa R; Scriba, Manfred R; Rikhotso, Rirhandzu S; Coville, NJDate:2017Bimetallic Pt–Ni nanoparticles were synthesized for use as electrocatalysts for the methanol oxidation reaction using a cost-effective microwave-irradiation synthesis procedure that offers precise temperature control. By varying the concentration ...Read more
Author:Henshilwood, C; D'Errico, F; Vanhaeren, M; Van Niekerk, K; Jacobs, ZDate:16 Apr 2004There are two competing models for the emergence of modern human behaviour: first, a late emergence in Africa or Eurasia similar to 50 to 40 thousand years ago and second, and a gradual transition in Africa between 250 to 50 ka. The earliest ...Read more
Author:Duvenhage, B; Kourie, DGDate:Jul 2007A legacy non-distributed logical time simulator is migrated to a distributed architecture to parallelise execution. The existing Discrete Time System Specification (DTSS) modelling formalism is retained to simplify the reuse of existing models. ...Read more
Author:Duvenhage, BDate:Sep 2007A legacy non-distributed logical time simulator was previously migrated to a distributed architecture to parallelise execution. The existing Discrete Time System Specification (DTSS) modelling formalism was retained to simplify the reuse of ...Read more
Author:Van Heerden, AdelaiDate:Dec 2016The African life philosophy of ubuntu is about two aspects ubu and ntu, and constitutes a wholeness and oneness (Ramose, 2002).1 Modern psychology has until very recently entailed oneness with its Western ideas and approaches (Sinha, 1986).2 ...Read more
Author:Carpenter, SR; DeFries, R; Dietz, T; Mooney, HA; Polasky, S; Reid, WV; Scholes, RJDate:Oct 2006The Millennium Ecosystem Assessment (MA) was designed to meet the needs of decision-makers for scientific information on the consequences of ecosystem change for human well-being. Even though the intended audience is decision-makers, the ...Read more