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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) ...
The polycyclic aromatic hydrocarbon content and mutagenicity of the residue from cane burning and vehicle emissions.
(1992)
Polycyclic (or polynuclear) aromatic hydrocarbons (PAHs)
are environmental pollutants produced during the incomplete
combustion of organic matter. Since many of these compounds
have been shown to be mutagenic and/or ...
Characterisation and quantification of wood extractives and their impact on pitch.
(2011)
The aims of this study were to characterise and quantify wood extractives in E. grandis and E.
nitens and determine the impact of wood extractives on pitch formation. Initially a comparison
was made with individual solvent ...
A phytochemical investigation of two South African plants with the screening of extractives for biological activity.
(2006)
Two South African medicinal plants, Strophanthus speciosus and Eucomis montana,
were investigated phytochemically. From Strophanthus speciosus a cardenolide,
neritaloside, was isolated, whilst Eucomis montana yielded ...
Phytochemical and anti-drepanocytosis studies of Cajanus cajan, Callistemon viminalis, Melaleuca bracteata var. Revolution Gold and Syzygium guineense.
(2010)
All over Africa, traditional healers use medicinal plants to prepare medicines to treat a
wide range of illnesses. One of these illnesses is sickle cell anaemia or drepanocytosis
or sicklemia. This disease is particularly ...
The transpassive behaviour of the anodic film on Fe-Cr alloys.
(1993)
This work was undertaken to investigate the transpassive behaviour of the anodic film on two Fe-Cr alloys, namely Fe18Cr and Fe18Cr2Mo in acidic aqueous media in the pH range 0.5 to 3.8. Two electrochemical techniques were ...
Toxic compounds in cycads.
(1990)
The present-day cycads comprise the diverse, modified,
remnants of a much larger group of gymnosperms which
flourished in the Mezozoic era. The systematic position that
the cycads occupy in the botanical hierarchy is ...
Complexes formed by zinc and cyanide ions at elevated pH.
(1990)
The experimental work described in this thesis is aimed primarily towards elucidation of the speciation of zinc-cyanide systems at elevated pH. In this study the formation and stability of H+-eN-, binary Zn2+-eN- and ternary ...
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 ...
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) ...