Browsing School of Chemistry and Physics by Title
Now showing items 160-179 of 700
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The effect of antioxidants on the Para-Aminobenzoic acid photosensitised formation of thymine dimer and singlet molecular oxygen.
(2005)On exposure to UV radiation DNA is damaged. The thymine cyclobutane dimer is one of the most significant of the lesions formed. This dimer is associated with the mutagenic and carcinogenic effect of UV radiation. It ... -
The effect of antisymmetrization in diquark models of baryons.
(1997)In this thesis the effect of antisymmetrization in diquark models of baryons composed of light (u and d) quarks is investigated. The diquark in this study is considered alternately as a pointlike and as a composite ... -
The effect of extraction methods on the oxidatives stability of marula and moringa seed oil.
(2017)Marula and moringa seeds are used as a source of food, and the seed oils are used in cosmetics, pharmaceuticals and in medicines. This is due to its high nutritive value and high content of unsaturated fatty acids, which ... -
The effect of metal nano-composites on the performance of thin film organic solar cells.
(2021)This thesis examines the role of plasmonic nano-particles in the fabrication of thin film organic solar cells (OSCs). Organic solar cells are made up of conducting polymers blend that are formed as ultrathin layers (a few ... -
The effect of metal nano-composites on the performance of thin film organic solar cells.
(2021)This thesis examines the role of plasmonic nano-particles in the fabrication of thin film organic solar cells (OSCs). Organic solar cells are made up of conducting polymers blend that are formed as ultrathin layers (a few ... -
The effect of Mo(CO)₆ as a catalyst in the carbonylation of methanol to methyl formate catalyzed by potassium methoxide under CO, syngas and H₂ atmospheres.
(2010)In patents describing the low temperature production of methanol from syngas catalysed by the Ni(CO)₄/KOCH₃ system, Mo(CO)₆ was claimed to enhance the catalytic activity of the system. However, there has been no clarity ... -
The effect of the f-component of the pseudopotential on selected properties of 5d transition metal systems
(2008)Cohesive energies, bulk moduli, and equilibrium lattice constants have been calculated for the 5d transition atoms (Hf, Ta, W, Re, Os, Ir and Pt) in face–centred cubic crystal lattices. We have used the ab initio ... -
The effect of the variable chaplygin gas on the CMB.
(2013)In this dissertation, we consider the variable chaplygin gas (VCG) model as derived from the Tachyon gas model and search for a sub-class of models that provide an adequate fit to the cosmic microwave background (CMB) ... -
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 ... -
Effects of novel chloroquine formulation on blood glucose concentration, renal and cardiovascular function in experimental animal paradigms.
(2011)Malaria disease poses a serious global health burden as recent reports have indicated that nearly half of the world’s population is at risk (WHO 2008). The World Health Organization (WHO) Expert Consultative Team has ... -
The effects of traveling ionospheric disturbances on SuperDARN near range echoes.
(2022)Traveling Ionospheric Disturbances (TIDs) and Near Range Echoes (NREs) are both natural phenomena observed by SuperDARN High Frequency (HF) radars. This study presents for the first time observations of NREs in the lower ... -
The electrochemical and electrocatalytic behaviour of glassy alloys.
(1999)The aim of this study was to investigate the electrochemical and electrocatalytic properties of a selection of glassy alloys for the hydrogen evolution reaction in base. The glassy alloy compositions tested included the ... -
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 ... -
Electrostatic wave phenomena in dusty plasma.
(1995)This thesis is concerned with the some aspects of electrostatic wave phenomena dusty plasmas. In particular Debye shielding, nonlinear potential structures such as diploar vortices and solitons are investigated. The ... -
Electrostatic waves and solitons in electron-positron plasmas.
(1998)The magnetosphere of pulsars is thought to consist of an electron-positron plasma rotating in the pulsar magnetic field (Beskin, Gurevich & Istomin 1983; Lominadze, Melikidze & Pataraya 1984; Gurevich & Istomin 1985). ... -
Elemental and phycochemical analysis of various seaweed species found along the east coast of KwaZulu-Natal, South Africa.
(2016)Abstract available in PDF file. -
Elemental composition and nutritional value of the edible fruits of coastal red milkwood (Mimusops caffra) and Transvaal red milkwood (Mimusops zeyheri) and the impact of soil quality.
(2017)Mimusops caffra and Mimusops zeyheri, both of the plant family Sapotaceae are indigenous plant species that grow widely in most parts of South Africa and the edible fruits of these species are picked and eaten raw in ... -
Elemental distribution in selected edible nuts and the impact of soil quality on the chemical characteristics of macadamia (Macadamia integrifolia) nuts
(2007)Environmental and nutritional imperatives make it necessary to carry out regular and reliable