Browsing by Subject "Mechanism"
Now showing items 1-8 of 8
-
Affirmative action as a mechanism for education reform in South Africa
(Potchefstroom University for Christian Higher Education, 2002)The aim of the study was to investigate affirmative action as a mechanism for education reform in South Africa. This investigation was prompted by political changes, which took place after the democratic elections of April ... -
A critical review of the occurrence of perfluoroalkyl acids in aqueous environments and their removal by adsorption onto carbon nanotubes
(Springer, 2018)The presence of perfluoroalkyl acids (PFAAs) in aquatic environments is a cause of concern, due to their toxicity, possible ecological impact and adverse effects in man. The release of these pollutants into receiving water ... -
Experimental and DFT investigation of the 1-octene metathesis reaction mechanism with the Grubbs 1 precatalyst
(Elsevier, 2006)Using density functional theory the metathesis reactions of 1-octene in the presence of Grubbs 1 [RuCl2(PCy3)2( CHPh)] is investigated. At the GGA-PW91/DNP level, the complete geometry optimization and the activation ... -
Irreducible complexity as a nexus for an interdisciplinary dialogue between machine logic, molecular biology and theology
(North-West University, 2007)The claim that a principle known as Irreducible Complexity (IC) is empirically discoverable is investigated successively from the perspective of engineering, then molecular biology and finally theology, with the aim of ... -
Mechanistic study of hafnium and zirconium extraction with organophosphorus extractants
(Taylor & Francis, 2018)Research on the purification of Zr has increased in the last few decades and although effective processes have been developed, little is known about the mechanism of Hf and Zr extraction; particularly, at low acid ... -
Mineralogical observation made during the kinetic dissolution study of chalcopyrite mineral in sulphate media under free pH at room temperature
(EARET, 2018)An attempt to determine the various phenomena at play and leaching mechanism of chalcopyrite dissolution, was conducted on a chalcopyrite concentrate. The study was performed at atmospheric conditions (room temperature) ... -
Modelling of Grubbs type precatalysts with bidentate hemilabile ligands
(North-West University, 2012)Metathesis is a valuable reaction for the production of new alkenes. In the last 50 years, heterogeneous as well as homogeneous catalysts have been used for this reaction. In the homogeneous category are the very successful ... -
On the mechanism of homogeneous alkene metathesis : a computational study
(North-West University, 2012)A mechanism for alkene metathesis has been proposed by Chauvin, wherein metal carbenes act as catalysts for the reaction. The use and discovery of Fischer-, Tebbe-, Grubbs- and Schrock-type metal carbenes have to a certain ...