Browsing Masters Degrees (Chemistry) by Title
Now showing items 146-165 of 255
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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 ... -
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 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 elemental analysis of Cyrtanthus obliquus and Lippia javanica.
(2012)A growing number of South Africans are relying more and more on alternative medicine for their healthcare needs due to the high cost of commercially available medicines and lack of medical aid. To these people, traditional ... -
Phytochemical and elemental studies of two indigenous medicinal plants of South Africa, Bridelia micrantha and Sideroxylon inerme.
(2014)Bridelia micrantha (Euphorbaceae) and Sideroxylon inerme (Sapoacaea) are two indigenous medicinal plants found in KwaZulu-Natal and are both known as ‘uMhlalamagwababa’ in isiZulu. These two plants species have similar ... -
A phytochemical investigation of Acridocarpus Natalitius and Typha Capensis.
(2001)In the present study, a phytochemical investigation of two medicinal plants, namely, Acridocarpus natalitius and Typha capensis is presented. The roots of A. natalitius afforded a variety of pentacyclic triterpenoids, ... -
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 ... -
A phytochemical study of Schefflera umbellifera and Elephantorrhiza elephantina.
(2007)In this study, two plant species, Schefflera umbellifera (Araliaceae) and -
Phytochemistry of Dais cotinifolia L.
(2018)Many plant-derived secondary metabolites have interesting biological activities and some plant compounds such as artemisinin (antimalarial) and vincristine (anticancer agent) are the active principles of main-stream ... -
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 ... -
The preferential oxidation of CO nickel oxide catalysts and the doping effects of platinum in hydrogen rich streams.
(2012)Hydrogen has now become a suitable candidate for alternative energy generation for small scale applications with the aid of fuel cells. On-board production of hydrogen from methane is the most preferred method via a ... -
Production and high temperature treatment of syngas.
(2010)Gas cleaning is an essential step in many chemical processes. The reason for cleaning is to remove components that can damage equipment or inhibit further reactions. The treatment can include the removal of particulates, ... -
Progress towards the pyrrolizidine alkaloid xenovenine (223H) via hydroamination.
(2016)Many natural products, pharmaceuticals and fine chemicals possess carbon-nitrogen bonds and thus the formation of such bonds is of great importance. Pyrrolizidine, indolizidine, quinolizidine and lehmizidine alkaloid ... -
Progress towards the stereoselective synthesis of Warburganal.
(1998)The aim of the project was to synthesize warburganal, a natural product isolated from the Warburgia plants native to Venda, known as a potent molluscicide, in a new, cheaper and more efficient way to be used in the ongoing ... -
Progress towards the synthesis of Indolizidine alkaloid 223AB
(2008)It has been shown that alkaloids from various sources are vital as lead compounds in medicinal research and thus also the efficient synthesis of these. With the goal of developing a general synthetic route that can potentially ... -
Proline n-oxide : manipulation of the 3D conformation of linear peptides.
(2013)During the last the few years, the number of peptide pharmaceutical drugs reaching the market has notably increased. Drug based peptides have many advantages, such as high potency of action and limited off-target side ...