Browsing School of Chemistry and Physics by Title
Now showing items 408-427 of 700
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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 ... -
Palladium complexes of (Benzoimidazol-2-ylmethyl) amine ligands : synthesis and applications as catalysts in methoxycarbonylation of olefins.
(2014)Compounds N-(1H-benzoimidazol-2-ylmethyl)-2-aniline(L1), N-(1H-benzoimidazol- 2-ylmethyl)-2-methoxyaniline (L2), N-(1H-benzoimidazol-2-ylmethyl)-2-thioaniline (L3) and N-(1H-benzoimidazol-2-ylmethyl)-2-bromoaniline (L4) ... -
Palladium complexes of diphosphazane and related ligands.
(2001)The synthesis, characterisation and X-ray structure detenninations of homonuclear nickel, palladium and platinum complexes with bis(phosphino)amine ligands is reviewed in Chapter 1. Particular attention is given to the ... -
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 ... -
Pharos : pluri-director, high-resolution, analyser of radiometric properties of soil cores.
(2001)The core-logger has been designed for the high-resolution radiometric analysis of soil cores using multiple detectors. This device allows for the automation of the measuring process and eliminates the need to dissect the ... -
Phase transitions in induced lattice gauge models.
(1995)The present research is based on the study of the phase structure of lattice models incorporating selfinteracting scalars and gauge background fields otherwise known as induced gauge models. Emphasis is placed on the effect ... -
Phosphine and phosphonite complexes of Mn(III), Co(III) and Rh(III) porphyrins.
(2003)This work is aimed at elucidating the structures and spectroscopic properties of phosphine and b phosphonite complexes of Mn(III), Co(III) and Rh(III) porphyrins, a class of coordination compounds that has been little ... -
Photo-degradation of caffeine in aqueous system using heterogeneous mixed oxide catalysts.
(2017)Abstract available in PDF file. -
Photo-switching of dabcyl modified silicon microwire field effect transistors.
(2017)Abstract available in PDF file. -
Photocatalyzed tandem oxidation reactions and their application in the synthesis of quinoxalines.
(2009.)No abstract available. -
A photochemical investigation of two suncreen absorbers in a polar and a non-polar medium.
(2002)Protection against the harmful effects of ultraviolet radiation is of increasing importance due to the depletion of stratospheric ozone, which shields the earth from harmful UVC rays (in the range 200-280 nm) and some UVB ... -
The photochemistry and photostabilization potential of plant extracts on sunscreen absorbers.
(2014)Abstract available in PDF file. -
Photothermal refraction and focusing.
(1997)This thesis begins with an introduction to the interaction and refraction of light in continuous media. It is shown how these properties can be exploited to achieve focusing of parallel light rays in such a medium. Past ... -
Physical and chemical properties of carbon nanotubes and silica nano-composites on the photo-catalytic activity of titania nanoparticles for selected organic pollutants.
(2014)High surface area materials were synthesized in order to support titanium dioxide (TiO2) photo-catalysts with the aim of enhancing the overall photo-catalytic properties of the catalyst. Mesoporous silica dioxide (SBA-15), ... -
Physico-chemical analysis of transformer oil and stability studies of their blends with synthetic and natural antioxidants.
(2012)This study is focused on the analysis of transformer oil commonly used in South African transformers and the characterisation of the blends of these oils with either synthetic antioxidants or those extracted from natural ... -
The physicochemical properties of carbon nanotube-titania nanocomposite for light harvesting.
(2014)Nanocomposites for dye-sensitised solar cells (DSSCs) were synthesised from ultrasonic acid-treated multiwalled carbon nanotubes (MWCNTs) and titania precursors by means of sol-gel and chemical vapour deposition (CVD) ... -
Phytochemical analyses and biological activities of four South African ficus species (moraceae)
(2015)Abstract available in PDF file. -
Phytochemical and analytical studies on two indigenous medicinal plants found in KwaZulu-Natal : Carissa macrocarpa and Harpephyllum caffrum.
(2012)Vulnerable communities and rural households usually turn to natural resources for their nutritional and healthcare needs. However, very little is known about the nutritional and medicinal value of many plant species ... -
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 ... -
Phytochemical and antiplasmodial studies of five ethnobotanically-selected South African medicinal plants.
(2019)Vachellia xanthophloea, Euclea natalensis, Ozoroa obovata, Gardenia thunbergia, and Pappea capensis are traditionally used to treat malaria/fever in Africa. Previous studies showed that the extracts of V. xanthophloea, G. ...