Browsing Faculty of Natural Science by Author "Faculty of Science"
Now showing items 21-40 of 396
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Assessment of genome visualization tools relevant to HIV genome research: development of a genome browser prototype
Boardman, Anelda Philine (University of the Western Cape, 2004)Over the past two decades of HIV research, effective vaccine candidates have been elusive. Traditionally viral research has been characterized by a gene -by-gene approach, but in the light of the availability of complete ... -
An assessment of Hypoxis hemerocallidea extracts, and actives as natural antibiotic, and immune modulation phytotherapies
Muwanga, Catherine (University of the Western Cape, 2006)In South Africa, the crude aqueous extract from Hypoxis hemerocallidea is used by AIDS patients to treat opportunistic infections, such as tuberculosis. The rapid emergence of multidrug-resistant tuberculosis, and extreme ... -
An assessment of medicinal hemp plant extracts as natural antibiotic and immune modulation phytotherapies
Case, Olivia Hildegard (University of the Western Cape, 2005)This study aimed to evaluate the antimicrobial efficacy of medicinal hemp plant extracts to determine the antibacterial effects of indigenous Sansevieria species and exotic Cannabis sativa phytotherapy varieties. This study ... -
Assessment of the biological quality of raw and treated effluents from three sewage treatment plants in the Western Cape, South Africa
Hendricks, Rahzia (University of the Western Cape, 2011)The aim of this study was to compare the water quality of raw wastewater and treated sewage effluents from three different sewage treatment plants in the Western Cape, South Africa. The treatment plants investigated are ... -
Biological properties of selected flavonoids of rooibos (Aspalathus linearis)
Snijman, Petra Wilhelmina (University of the Western Cape, 2007)Bioactivity-guided fractionation was used to identify the most potent antioxidant and antimutagenic fractions contained in the methanol extract of unfermented rooibos (Aspalathus linearis), as well as the bioactive principles ... -
Boron-doped Diamond Sensors for the Determination of Organic Compounds in Aqueous Media
Hess, Euodia (University of the Western Cape, 2010)In electrochemical oxidation treatment of wastewater, the electrode material is an important parameter in optimizing oxidative electrochemical processes, since the mechanism and products of several anodic reactions are ... -
Brine treatment using natural adsorbents
Mabovu, Bonelwa (University of the Western Cape, 2011)The current study investigated application of natural adsorbents in brine treatment. Brines are hypersaline waters generated in power stations and mining industries rich in Mg2+, K+, Ca2+, Na+, SO4 2- , Cl- and traces of ... -
Browser-based and mobile video communication alternatives for Deaf people
Wang, Yuanyuan (University of the Western Cape, 2011)This thesis offers some prototypes to provide browser-based and mobile video communication services for Deaf people and evaluates these prototypes. The aim of this research is to identify an acceptable video communication ... -
Can Acacia Karroo and Boscia Albitrunca be used in the biogeochemical prospecting for gold :a case study at the Blue Dot Mine, Amalia, Northwest province, South Africa
Mshumi, Unathi (University of the Western Cape, 2006)In areas of transported overburden there is frequently a weak relationship between soil and the underlying mineralized bedrock. Vegetation has the capability to absorb metals from the underlying substrate via its extensive ... -
Cardiovascular effects of Leonotis leonurus extracts in normotensive rats and in isolated perfused rat heart
Obikeze, Kenechukwu (University of the Western Cape, 2004)This thesis discussed the cardiovascular effects of the aqueous leaf extract and a fraction of the methanol extract of Leonotis leonurus, a plant commonly used in traditional medicine in South Africa for the treatment of ... -
Catalyst Coated Membranes (CCMs) for polymerelectrolyte Membrane (PEM) fuel cells
Barron, Olivia (University of the Western Cape, 2010)The main objective of this work it to produce membrane electrode assemblies (MEAs) that have improved performance over MEAs produced by the conventional manner, by producing highly efficient, electroactive, uniform catalyst ... -
The catalytic membrane reactor for the conversion of methane to methanol and formaldehyde under mild conditions
Modibedi, Remegia Mmalewane (University of the Western Cape, 2005)This thesis described the development of new catalytic system for the conversion of natural gas (methane) to liquid products such as methanol and formaldehyde. This technology can allow the exploitation of small and medium ... -
Cesium hydrogen sulphate and cesium dihydrogen phosphate based solid composite electrolyte for fuel cell application
Naidoo, Sivapregasen (University of the Western Cape, 2004)A new high temperature solid electrolyte composite was developed, with CsHSO4 and CsH2PO4 as the proton conducting material in composition with PTFE and SiO2 to enhance the solid electrolyte composites mechanical strength ... -
The challenge of implementing integrated water resources management (IWRM) in the Lower Okavango River Basin, Ngamiland district, Botswana
Kgomotso, Phemo Karen (University of the Western Cape, 2005)Water resources management practice has undergone changes in management approaches and principles over time. It was previously characterised by what scholars refer to as the hydraulic mission where ‘extreme engineering’ ... -
Characterisation of AtPNP-A - a novel arabidopsis thaliana gene with role in water and salt homeostasis
Bastian, René (University of the Western Cape, 2009)Plant natriuretic peptides (PNPs) are a novel class of extracellular, systemically mobile molecules that elicit a number of plant responses important in homeostasis and growth. Natriuretic peptides were first identified ... -
Characterisation of eight non-codis Ministrs in four South African populations to aid the analysis of degraded DNA
Ismail, Aneesah (University of the Western Cape, 2009)In many forensic cases, such as mass disasters reconstruction cases, the recovered DNA is highly degraded. In such incidences, typing of STR loci has become one of the most powerful tools for retrieving information from ... -
Characterisation of microbial communities associated with hypolithic environments in Antarctic Dry Valley soils
Khan, Nuraan (University of the Western Cape, 2008)The Eastern Antarctic Dry Valley region is a polar desert, where conditions of extreme aridity, high temperature fluctuations and high irradiation levels make it one of the most extreme environments on earth. Despite the ... -
Characterization and chemical speciation modelling of saline effluents at Sasol Synthetic Fuels Complex-Secunda and Tukuta power station
Nyamhingura, Amon (University of the Western Cape, 2009)The study shows conclusively that brine composition and concentration is highly variable at these South African power utilities and processes such as RO, contact with ash and CO2 ingress can have an impact upon the overall ... -
Characterization of platinum-group metal nanophase electrocatalysts employed in the direct methanol fuel cell and solid-polymer electrolyte electrolyser
Williams, Mario (University of the Western Cape, 2005)Characterization of nanophase electrocatalysts, which are an essential part in the direct methanol fuel cell (DMFC) and solid-polymer electrolyte (SPE) electrolyser, have been studied in this work. Their nanoparticulate ... -
Chemical and biological investigation into some selected African indigenous medicinal plants
Babajide, Jelili Olalekan (University of the Western Cape, 2009)African medicinal plants are commonly used throughout Africa to treat a variety of ailments including wounds and ulcers, cough and chest complaints, gingivitis, fever and gonorrhoea, indication all related to infection and ...