Browsing Masters Degrees (Chemistry) by Title
Now showing items 160-179 of 255
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Production and high temperature treatment of syngas.
(2010)Gas cleaning is an essential step in many chemical processes. The reason for cleaning is to remove components that can damage equipment or inhibit further reactions. The treatment can include the removal of particulates, ... -
Progress towards the pyrrolizidine alkaloid xenovenine (223H) via hydroamination.
(2016)Many natural products, pharmaceuticals and fine chemicals possess carbon-nitrogen bonds and thus the formation of such bonds is of great importance. Pyrrolizidine, indolizidine, quinolizidine and lehmizidine alkaloid ... -
Progress towards the stereoselective synthesis of Warburganal.
(1998)The aim of the project was to synthesize warburganal, a natural product isolated from the Warburgia plants native to Venda, known as a potent molluscicide, in a new, cheaper and more efficient way to be used in the ongoing ... -
Progress towards the synthesis of Indolizidine alkaloid 223AB
(2008)It has been shown that alkaloids from various sources are vital as lead compounds in medicinal research and thus also the efficient synthesis of these. With the goal of developing a general synthetic route that can potentially ... -
Proline n-oxide : manipulation of the 3D conformation of linear peptides.
(2013)During the last the few years, the number of peptide pharmaceutical drugs reaching the market has notably increased. Drug based peptides have many advantages, such as high potency of action and limited off-target side ... -
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. -
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 ... -
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.
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 ...