Browsing Masters Degrees (Chemistry) by Issue Date
Now showing items 21-40 of 221
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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 ... -
Molluscicides and other compounds from indigenous plants.
(1996)The use of plants with molluscicidal properties IS a simple, inexpensive and appropriate technology for focal control of the snail vector. Isolation and identification of the active constituents is essential for the study ... -
The functionalisation of thenyl carbamates.
(1996)The carbamate functionality has always been associated with a major class of biocides because of its ability to function as an inhibitor of the enzyme acetylcholinetransferase. However, carbamates are not limited to ... -
Part 1: The determination of activity coefficients at infinite dilution ; Part 2: Investigations into the colour components of raw sugar.
(1996)PART I: This work is part of an investigation to determine activity coefficients at infinite dilution (1'73) of hydrocarbons dissolved in the industrially important polar solvent tetrahydrothiophene-l, l-dioxide ... -
Amino-, amido- and oxy-bipyridyl complexes of copper, ruthenium, molybdenum and rhodium.
(1996)The work described in this thesis concerns the synthesis and study of the coordination behaviour of the 6-anilino-2,2'-bipyridyl (Habipy), 6-N-methylanilino-2,2'-bipyridyl (mabipy), 6-piperidyl2,2'.- bipyridyl (pipbipy) ... -
An approach to the synthesis of chiral carbamates.
(1996)An attempt to obtain chiral induction across the carbamate linkage (-NCOO-), using chiral amines and the benzyl carbamate, was embarked upon. Initial studies centred around the benzyl carbamate protected form of ... -
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Extractives from Neobeguea mahafalensis and Cedrelopsis grevei.
(1997)Neobeguea mahafalensis Leroy. and Cedrelopsis grevei Baill. are the two Madagascan species which were investigated in this work. Neobeguea mahafalensis Leroy. belongs to the Neobeguea genus of the Meliaceae family and is ... -
The use of ephedrine and camphor in asymmetric Diels-Alder reactions.
(1997)Due to the ever increasing demand for the production of enantiopure drugs and biologically active compounds, the study of asymmetric synthesis and the production of more efficient and cost effective methods of obtaining ... -
Capillary electrophoresis and related techniques for the analysis of fresh water algal toxins.
(1997)As cyanobacteria (also known as blue green algae) produce a range of cyclic peptides which are highly toxic, capillary electrophoresis and associated techniques have been investigated to assess their applicability ... -
Thermodynamics of liquid mixtures containing N-methyl-2- pyrrolidone.
(1997)This thesis involves a study of the thermodynamics of liquid mixtures containing N-methyl-2pyrrolidone (NMP) and hydrocarbons or ethers. NMP is a polar liquid which is used in liquid extraction procedures for the separation ... -
Palladium catalysed oxidation of a-olefins to ketones.
(1997)The aim of this research project was to investigate the oxidation reactions of olefins to ketones. Initial studies revolved around the oxidation reactions of terminal olefins to symmetrical dialkyl ketones. The inability ... -
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 ... -
Oxidation of primary alcohols to aldehydes and esters.
(1998)The initial aim of this research project was to oxidise Cr C4 alcohols to their respective aldehydes. However, isolation of these aldehydes was impossible due to their low boiling points. Another problem was the proximity ... -
The effects of dissolved solids in process cooling water and mine water on concrete corrosion.
(1998)An investigation has been carried out to determine the effects of the dissolved solids in process cooling water (pcw) and mine water (mw) on concrete corrosion. An experimental set up was designed to simulate the process ... -
Extractives of three southern African medicinal plants.
(1998)In this investigation the chemistry of three southern African plants used for medicinal purposes was investigated. The plants were Dioscorea dregeana, Avonia rhodesica and Equisetum ramossisimum. Extracts of all three ... -
The chemical constituents of Ehretia rigida, Apodytes dimidiata and Ocotea kenyensis.
(1998)Three species have been investigated in this project: Iso-ocobullenone (p 23) and its probable precursor (p 27) have been isolated from the leaves and bark of Ocotea kenyensis. This is only the second time that these ... -
Homoisoflavonids and stilbenoids from Scilla species.
(1998)Bulbs of Scilla natalensis Planch, Scilla nervosa (Burch.) Jessop, Scilla dracomontana Hilliard and Burt and Scilla kraussii Bak. (Hyacinthaceae) were investigated. The plants are widely used by the local African people ... -
A kinetic and equilibrium study of rooibos tea infusions.
(1998)The total mineral ion concentration of Rooibos Tea was determined using ICP-OES. Significant concentrations of Na, K, Mg, Ca, P were found, and trace levels of Al, Fe, Mo, Sr, Zn, Ba, Cu and Pb detected. Protocatechuic ...
