Browsing Masters Degrees (Chemistry) by Title
Now showing items 99-118 of 287
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Heterogenisation of selective ethylene tetramerisation catalysts.
(2010)The aim of the study was to heterogenise existing tetramerisation catalysts by supporting the bis(diphenylphosphino)amine ligands on polymer. The polymer of choice was Merrifield’s resin which was functionalized to enable ... -
Heteroleptic copper (II) chemotherapeutic agents.
(2019)In this study, a range of heteroleptic copper(II) chelates were synthesized as chemotherapeutic agents. Two primary heteroleptic copper(II) chelates, [Cu(L)(H2O)2]NO3 and [Cu(L1)(H2O)2]NO3 were successfully synthesized and ... -
Homogeneous dioxoruthenium(VI) catalysts for the oxidation of alcohols.
(2000)Compounds of the form RuO2(Y-py)2CI2 1 (py = pyridine, Y = H, 4-t-Bu, 3-CN, 4-CN, 2-Br, 3-Br, 4-Br, 4-Cl, 4-Me, 4-C(O)C6H5, 3-COOH, 4-COOH), RuO2ZCI2 2(Z = bipyridine, phenanthroline) and RuO2(OH)2(Y-py)2 3 (py = pyridine, ... -
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 ... -
Identification and quantification of chelidonic acid and other ligands with potential for Ni uptake in the hyperaccumulator, Berkheya coddii.
(2014)B. coddii is a known nickel hyperaccumulator, a plant that is able to take up high levels of Ni (< 37 000 mg kg -1) without exhibiting toxic effects. It grows in serpentine soil and is endemic to the Barberton Region, ... -
Identification of triterpenoids in Brachylaena discolor DC, a plant with antidiabetic activity.
(2019)In recent times, metabolic diseases such as diabetes and hypertension have become a huge burden in populations around the world. Among these diseases, the number of diabetes mellitus cases have been increasing at an alarming ... -
Immunological studies of thymine dimer quantitation.
(1992)Ultraviolet irradiation of DNA induces the formation of a number of mutagenic lesions. The most prolific of these is the cis-syn thymine dimer (formed maximally at 260 nm) and this has been implicated in the reaction ... -
Influence of alkali metal promotion on the properties of co-precipitated Cu/Zn/Cr higher alcohol synthesis.
(1994)Abstract available in PDF. -
The influence of physicochemical reaction parameters on the synthesis of multi-walled carbon nanotubes for use as catalyst supports.
(2012)Multi-walled carbon nanotubes (MWCNTs) and other shaped carbon nanomaterials (SCNMs) were synthesized by the floating catalyst chemical vapour deposition (CVD) method, using either ferrocene [1] as the catalyst at 2.5 ... -
The influence of surfactants on the solubility of acenaphthene and phenanthrene and their extraction from spiked soils.
(2005)In the first phase of the study, the effect of five Safol surfactants on the aqueous solubility of phenanthrene and acenaphthene was determined. The fixed variables were temperature and ionic strength, while surfactant ... -
Investigating the standard method used by Umgeni Darvill Waste Water Works for the determination of pseudo total metal concentrations in their sewage sludge.
(2016)Abstract available in PDF file. -
An investigation into air stable analogues of Wilkinson's catalyst.
(2010)Since the discovery of Wilkinson’s catalyst and its usefulness in the homogeneous hydrogenation of olefins many investigations have been carried out on trivalent, tertiary phosphine–rhodium complexes.¹ Studies have shown ... -
An investigation into the antimalarial activity of metal chelators
(2008)Malaria remains one of the greatest problems facing developing nations, especially in sub-Saharan Africa. Part of the problem stems from increased resistance to current treatments hence there is a large drive to develop ... -
An investigation into the influence of substituents and extended π-conjugation on the substitution reactions of bifunctional platinum (II) complexes.
(2015)Abstract available in PDF file. -
An investigation of a heterogeneous aminohydroxylation catalyst.
(2010)Os-Zn-Al hydrotalcite-like compounds (HTlc’s) were synthesised by the co-precipitation method and characterised using different techniques (powder XRD, ICP-OES, FT-IR spectroscopy, BET-surface area measurements, SEM and ... -
An investigation of acetone-photosensitised DNA kinetics.
(1992)Ultraviolet (UV) radiation is a potent DNA-damaging agent and a known inducer of mutations and skin cancer. The increasing incidence of skin cancer has emphasised the importance of understanding the mechanistic ... -
An investigation of new heterogeneous hydrotalcite-like catalysts for the cis-dihydroxylation of olefins.
(2004)The use of supported catalysts to essentially combine the positive traits offered by both homogeneous and heterogeneous catalysis has become a competitive field of research. In particular, hydrotalcite-like catalysts (HTIc) ...