Browsing Masters Degrees (Chemistry) by Title
Now showing items 186-205 of 287
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Reactions and reactivity of allylic and benzylic carbamates.
(1995)The purpose of this investigation was to study the effect of the carbamate group on the reactions and reactivity of substituted 1,1-diphenylmethane and a,ro-diphenyl allylic compounds. A series of carbamates were prepared ... -
Reduction of aldehydes and ketones to their corresponding alcohols in 1-butyl-3-methylimidazolium tetrafluoroborate.
(2017)The use and release of volatile organic solvents (VOS) to the atmosphere have become detrimental to both human health and his environment. In addition, the non-recyclability and the excessive consumption of these solvents ... -
Rhenium(I) and -(V) complexes of N-donor heterocyclic chelates.
(2016)Abstract available in PDF file. -
The role of sodium silicate in newsprint deinking.
(2003)Mondi Ltd. operates a deinking plant at its Merebank mill. The plant recycles 85 000 tons per annum of flat news and magazine to produce a furnish for its newsprint papermachines. A review of the relevant pulping and ... -
Role of Substituents on the reactivity of mononuclear cis-platinum(II) complexes with 2 (phenylthiomethyl)pyridyl/quinolyl non-leaving ligands.
(2017)Abstract available in PDF file. -
Safety assessment of skin-lightening formulations commonly available in the Nigerian market.
(2016)Abstract available in PDF file. -
Screening of water pollutants using metallophthalocyanine-based chemically modified electrodes.
(2021)Abstract available in PDF. -
Seasonal analysis of water and sediment along the Umgeni River, South Africa.
(2014)Increased pollution caused by industrialization, urbanization, afforestation and agriculture has resulted in severe reductions to the health of rivers in South Africa. Numerous studies carried out on South African rivers ... -
Seasonal and spatial distribution of heavy metals in surface water and sediments of Msunduzi river, KwaZulu-Natal, South Africa.
(2017)Some physicochemical parameters and heavy metal concentrations of surface water as well as sediments in the Msunduzi River were investigated to provide information on the spatial and seasonal characteristic patterns of ... -
Seed bank distribution and viability of selected Vachellia and Acacia species in KwaZulu-Natal, South Africa.
(2015)There is increasing concern regarding the impact of invasive alien plants (IAPs), where their spread is a serious threat to both the structure and functionality of ecosystems, which causes the loss of biodiversity. ... -
The selective hydrogenation of octanal in the presence of octene using y-alumina supported copper-silver bimetallic catalysts.
(2014)This work pertains to the selective hydrogenation of octanal in the presence of octene, which has applications in the hydroformylation process. The octanal should be hydrogenated to the desired product, octanol, while ... -
The selective oxidation of n-butane to maleic anhydride.
(2003)Industrial catalysts used in commercial processes for the production of maleic anhydride are mainly Vanadium Phosphorous Oxide (VPO) catalysts. The VPO catalyst used is Vanadyl Pyrophosphate (VO)2P207 made from its precursor ... -
South African plants as a source of herbicides : identification of a compound with phytotoxic activity from artemisia afra jacq. ex willd.
(2017)Abstract available in PDF file. -
Soya protein isolate production by various methods.
(1995)The concentrated protein fractions of soyabeans, known as soya protein isolate, was produced by three different methods from the same raw material namely defatted soya flakes. Extraction of the soluble fraction of the ... -
Structural and kinetic studies of the ring opening polymerization of lactides and ε-caprolactone by (Benzimidazolylmethyl)amine ZN(II) and Cu(II) complexes.
(2014)The syntheses and structural characterization of Zn(II) and Cu(II) carboxylate complexes supported on benzimidazolyl amine ligands and their application in the ring opening polymerization of lactides and ɛ-caprolactone are ... -
Structural and Physical Studies of Co(III) Salen Derivatives.
(2007)A number of ligands that belong to the salen-type family were synthesized in this thesis. These ligands were synthesized from salicylaldehyde and 1,2-phenylenediamine, 1,3- diamino-2-hydroxypropane, 1,2-diamino-ethane, ... -
Structural, physical and biological studies of transition metal Schiff base complexes.
(2013)The aims of this work were first to synthesize and fully characterize compounds that may function as bleomycin analogues and, second, to test their anticancer activity in vitro. Three novel tetradentate O,N,N,O Schiff ... -
The structure and synthesis of metabolites from virgilia oroboides and chlorophora excelsa (Iroko)
(1989)In the present study the acetone extract of the heartwood of two trees, Virgilia oroboides and Chlorophora excelsa, were investigated. The heartwood of Virgilia oroboides afforded a variety of known flavonoids, as well as ...