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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) ...
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 ...
Oxidative dehydrogenation of n-octane using vanadium-based hydrotalcite-like compounds.
(2010)
The oxidative dehydrogenation of alkanes provides a potential route to higher value products such as olefins and aromatic compounds. Alkanes are of low environmental impact and their increasing availability has prompted ...
A study of nickel molybdenum oxide catalysts for the oxidative dehydrogenation of n-hexane.
(2009)
Nickel molybdenum oxide catalysts with different chemical compositions have been synthesized
and tested for the oxidative dehydrogenation of n-hexane. The co-precipitation method was used
for the synthesis and several ...
Electrochemical investigation of the growth of anodic films on iron and ferrous alloys.
(1994)
An electrochemical investigation of the corrosion of iron and Fe18Cr based stainless steel alloys was
undertaken with particular emphasis on the nucleation and growth of surface films.
Chronoamperometry was shown to be ...
Thermodynamics of liquid mixtures : experimental and theoretical studies on the thermochemical and volumetric behaviour of some liquids and liquid mixtures.
(1996)
The excess molar volumes VEm and the excess molar enthalpies HEm have been determined for several binary systems at 298.15 K using an Anton Paar Digital Densitometer and a 2277
Thermal Activity Monitor, respectively. VEm ...