Browsing Magister Scientiae - MSc (Chemistry) by Issue Date
Now showing items 1-20 of 209
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Oxidative fixation of dinitrogen by photocatalysis
(University of Western Cape, 2000)The heterogeneous photocatalytic oxidation of dinitrogen to nitrate, NO3 and/or nitrite, no2 using peroxy species of titanium (IV) in aqueous suspensions has been investigated. The photocatalysts used were titanium peroxide ... -
The extraction, purification and evaluation of compounds from the leaves of Leonotis Leonorus for anticonvulsant activity
(University of the Western Cape, 2002)The aim of this study is to isolate and evaluate the anticonvulsant components from the leaves of Leonotis leonorus (L) R.aR. and to see if there is any change in activity with the origin of the plant material and I or the ... -
Cesium hydrogen sulphate and cesium dihydrogen phosphate based solid composite electrolyte for fuel cell application
(University of the Western Cape, 2004)A new high temperature solid electrolyte composite was developed, with CsHSO4 and CsH2PO4 as the proton conducting material in composition with PTFE and SiO2 to enhance the solid electrolyte composites mechanical strength ... -
Heterocycle carbonyl pyrazolyl palladium(II) complexes :synthesis, ethylene oligomerisation and polymerisation catalysis
(University of the Western Cape, 2004)Reactions of furan, thiophene and alkyl carbonyl chlorides with Unsubstituted and substituted pyrazoles produced the desired pyrazolyl ligands, [R2pyrazole-CO-R/] (R= H, Me, tBu, Ph, R/ = furan, thiophene, Me or tBu) in ... -
Pyrazole and pyrazolyl palladium(II) and platinum(II) complexes: synthesis and in vitro evaluation as anticancer agents
(University of the Western Cape, 2004)The use of metallo-pharmaceuticals, such as the platinum drugs, for cancer treatment illustrates the utility of metal complexes as therapeutic agents. Platinum group metal complexes therefore offer potential as anti-tumour ... -
Synthesis and characterisation of proton conducting membranes for direct methanol fuel cell (DMFC) applications
(University of the Western Cape, 2005)For a direct methanol fuel cell (DMFC), the proton exchange membrane must conduct protons and be a good methanol barrier. In addition to the high methanol permeability achieved by these membranes, they are very expensive ... -
The application of high capacity ion exchange absorbent material, synthesized from fly ash and acid mine drainage, for the removal of heavy and trace metals from secondary co-disposed process waters
(University of the Western Cape, 2005)The objective of this study was to investigate the feasibility of the application of low cost high capacity inorganic ion exchange material, synthesized form collected fly ash and acid mine drainage solid residues, for the ... -
Polymer/nano-organic composite proton exchange membranes for direct methanol fuel cell application
(University of the Western Cape, 2005)The proton exchange membrane is one key component of direct methanol fuel cells, which has double functions of conducting protons, separating fuels and oxidant. At present, the performance and price of sulfonic acid proton ... -
Characterization of platinum-group metal nanophase electrocatalysts employed in the direct methanol fuel cell and solid-polymer electrolyte electrolyser
(University of the Western Cape, 2005)Characterization of nanophase electrocatalysts, which are an essential part in the direct methanol fuel cell (DMFC) and solid-polymer electrolyte (SPE) electrolyser, have been studied in this work. Their nanoparticulate ... -
The synthesis of 3-allyl-4-ethyl-2- (1'-hydroxyethyl)-1-methoxynaphthalene and its behaviour towards base- and palladium-promoted cyclisation under aerobic and anaerobic conditions
(University of the Western Cape, 2005)Over the years, Giles and co-workers have established that, upon treatment with potassium tert-butoxide, tetra-substituted naphthalenes undergo cyclisations to afford naphthopyrans. It was suggested that these base-induced ... -
Pyridine carboxamide and pyrazole palladium(II) complexes as catalyst precursors for phenylacetylene polymerization
(University of the Western Cape, 2005)The objectives of this project were to synthesize and characterise pyridine carboxamide ligands and their palladium complexes and investigate their catalytic activity in the polymerization process of phenylactylene. -
The development of appropriate brine electrolysers for disinfection of rural water supplies
(University of the Western Cape, 2005)A comparative study of electrolysers using different anodic materials for the electrolysis of brine (sodium chloride) for the production of sodium hypochlorite as a source of available chlorine for disinfection of rural ... -
Studies on some biologically active natural products from Tulbaghia Alliacea
(University of the Western Cape, 2005)It is believed that early humans had knowledge of how to use traditional medicinal plants, but the knowledge has been partially lost as society underwent various changes leading to new civilizations. The aim of this study ... -
Synthesis and electrochemical characterisation of conducting polyaniline-fly ash matrix composites
(2005)The aim of this study was to produce useful composite materials from fly ash, a major waste product of coal combustion from power plants. Polyaniline-fly ash (PANI-FA) composites were prepared by in situ polymerisation of ... -
Fabrication and kinetic modeling of cytochrome P4502D6 amperometric biosensors for serotonin reuptake inhibitors
(University of the Western Cape, 2005)An amperometric biosensor was prepared by in situ deposition of cytochrome P4502D6 (CYP2D6, P4502D6) enzyme on a polyaniline (PANI)-doped glassy carbon electrode. The PANI film was electrochemically deposited on the electrode ... -
Homogeneity of nanophase electrocatalysts supported on mesoporous materials
(University of the Western Cape, 2006) -
Composite low temperate hydrogen storage material on the basis of iron-titanium alloy ; synthesis and structure
(University of the Western Cape, 2006)It is widely believed that hydrogen will within a few tens of years become the means of storing and transporting energy. The reason is the depletion of hydrocarbons and the relatively facile production of hydrogen from ... -
Hydrogen selective properties of cesium-hydrogensulphate membranes
(University of the Western Cape, 2006)Over the past 40 years, research pertaining to membrane technology has lead to the development of a wide range of applications including beverage production, water purification and the separation of dairy products. For the ... -
The electrogeneration of hydroxyl radicals for water disinfection
(University of the Western Cape, 2006)This study has shown that OHË radicals can be generated in an Fe/O2 cell from the electrode products via Fenton’s reaction and used for water disinfection. The cell system in which the experiments were carried out ... -
Phytochemical studies of Helichrysum patulum
(University of the Western Cape, 2006)Since Helichrysum is known by the indigenous people of Africa for therapeutic properties, such as against colds, flu and wounds, the aim of this study was to focus on the patulum species found predominantly in the Western ...
