Browsing Masters Degrees (Chemistry) by Title
Now showing items 152-171 of 255
-
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 ... -
Reactions and reactivity of allylic and benzylic carbamates.
(1995)The purpose of this investigation was to study the effect of the carbamate group on the reactions and reactivity of substituted 1,1-diphenylmethane and a,ro-diphenyl allylic compounds. A series of carbamates were prepared ... -
Reduction of aldehydes and ketones to their corresponding alcohols in 1-butyl-3-methylimidazolium tetrafluoroborate.
(2017)The use and release of volatile organic solvents (VOS) to the atmosphere have become detrimental to both human health and his environment. In addition, the non-recyclability and the excessive consumption of these solvents ... -
Rhenium(I) and -(V) complexes of N-donor heterocyclic chelates.
(2016)Abstract available in PDF file. -
The role of sodium silicate in newsprint deinking.
(2003)Mondi Ltd. operates a deinking plant at its Merebank mill. The plant recycles 85 000 tons per annum of flat news and magazine to produce a furnish for its newsprint papermachines. A review of the relevant pulping and ... -
Role of Substituents on the reactivity of mononuclear cis-platinum(II) complexes with 2 (phenylthiomethyl)pyridyl/quinolyl non-leaving ligands.
(2017)Abstract available in PDF file.