Browsing Doctoral Degrees (Chemistry) by Title
Now showing items 68-87 of 149
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N- and S-donor pincer complexes of Ni and Cu: synthesis and application as catalysts in alkane oxidation.
(2017)Abstract available in PDF file. -
N-heterocyclic carbene-iron(II) complexes : chemistry and application as transfer hydrogenation catalysts.
(2013-11-27)In the last decade N-heterocyclic carbene (NHC) ligands have become important in organometallic chemistry and homogeneous catalysis, rivalling the well established phosphines. Most of the current attention to date has ... -
Nitrogen- and phosphine-donor ruthenium(II/III) and palladium(II) complexes : synthesis and catalytic hydrogenation of ketones, alkenes and alkynes.
(2016-02-29)The ligands, 2-(2-pyridyl)benzimidazole (L1), 2-(2-pyridyl)bezothiazole (L2), and 2-(2-pyridyl)bezoxazole (L3) were prepared from o-phenylenediamine, o-aminothiophenol and 2-aminophenol, respectively, following literature ... -
Nitrogen-donor late transition metal complexes as ethylene oligomerization catalysts.
Abstract available in PDF file. -
Nitrogen-doped carbon nanotubes : controlled synthesis, physicochemical characterization and application as Pd catalyst supports in a hydrogenation reaction.
(2015)Catalysis is a fundamental pillar in the development of a sustainable economy that is in line with the principles of green chemistry. This drives the need to develop novel catalytic systems whose activity and selectivity ... -
Organic flame retardants in the indoor environment.
(2016-04-08)Flame retardants (FRs) have become ubiquitous contaminants found in humans, animals, various outdoor environments, e.g. air, soil, sediment, etc., and indoor environments particularly, homes, automobiles, classrooms and ... -
Oxidation and oxidative dehyrogenation of n-octane using V₂O₅ supported on hydroxyapatites.
(2012)Vanadium pentoxide with loadings varying from 2.5-15 wt% was supported on hydroxyapatite (HAp) by the wet impregnation technique. The materials were characterized by techniques such as X-ray powder diffraction (XRD), ... -
Oxidation of ɳ-octane over molybdenum oxide based catalysts.
(2016-04-11)The research into alternative feedstocks has gained importance in recent years to replace olefins by alkanes. The use of alkanes is viable since they are cheap, abundant and can be easily sourced from Gas to liquid (GTL) ... -
Oxidative degradation of textile dyes with hypochlorite and chlorine dioxide.
(2010)The oxidation reaction mechanisms of water soluble textile dyes amaranth (an azo dye), brilliant blue-R (a triaryl dye) and safranine-O (an azine dye) with oxidants- hypochlorite and chlorine dioxide, were investigated. ... -
The oxidative dehydrogenation of n-Hexane and n-Octane over vanadium magnesium oxide catalysts.
(2006)Vanadium magnesium oxide (VMgO) catalysts with different vanadium loadings were synthesized and tested for catalytic activity using pure «-hexane and «-octane as feeds. High surface area catalysts were obtained by the wet ... -
Oxidative dehydrogenation of n-octane over molybdate based catalysts.
(2014)The oxidative dehydrogenation of n-octane over different molybdates was investigated using a continuous flow fixed bed reactor in the temperature range of 350-550 °C at 50 °C intervals. Molybdates investigated in this ... -
Oxidative dehydrogenation of n-octane using vanadium-based hydrotalcite-like compounds.
(2010)The oxidative dehydrogenation of alkanes provides a potential route to higher value products such as olefins and aromatic compounds. Alkanes are of low environmental impact and their increasing availability has prompted ... -
Oxidative reactions to form ethyl methacrylate via a phase specific iron phosphate catalyst .
(2012)The importance of alkyl methacrylates has been firmly established within the chemical industry. For example, free radical polymers, which contain the methacrylate backbone are more rigid than acrylate polymers. Several ... -
The photochemistry and photostabilization potential of plant extracts on sunscreen absorbers.
(2014)Abstract available in PDF file. -
Phytochemical analyses and biological activities of four South African ficus species (moraceae)
(2015)Abstract available in PDF file. -
Phytochemical and analytical studies on two indigenous medicinal plants found in KwaZulu-Natal : Carissa macrocarpa and Harpephyllum caffrum.
(2012)Vulnerable communities and rural households usually turn to natural resources for their nutritional and healthcare needs. However, very little is known about the nutritional and medicinal value of many plant species ... -
Phytochemical and elemental analysis of nettles found in KwaZulu-Natal, South Africa.
(2016)There is a rich diversity of indigenous edible plants in South Africa. Rural communities have for years, been collecting indigenous edible medicinal plants for food and for their medicinal properties. However, a combination ... -
Phytochemical investigation and tissue culture studies on the South African knob trees, Zanthoxylum Capense and Senegalia Nigrescens.
(2017)Abstract available in PDF file. -
A phytochemical investigation of members of the hyacinthaceae family and biological screening of homoisoflavanones and structurally related compounds.
(2004)The Hyacinthaceae family is richly represented in southern Africa. Of the five subfamilies, three are found in southern Africa. These are the Urgineoideae (URG), Ornithogaloideae (ORN) and the Hyacinthoideae (HYA). The ... -
Phytochemical, elemental and biological studies of three Ficus species (Moraceae) found in KwaZulu-Natal, South Africa.
(2017)Ficus (Moraceae), with over 800 species, is one of the understudied genera in modern pharmacognosy. Rural households depend on their fruits for food while other plant parts such as leaves and bark are utilised for medicinal ...