Browsing Faculty of Natural Science by Title
Now showing items 1912-1931 of 2565
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Pre-equilibrium cross section calculations with a realistic effective nucleon-nucleon interaction
(University of the Western Cape, 1995)The principle aim of this work is to improve the way in which pre-equilibrium double differential cross-sections are currently calculated [1, 2, 3, 4]. The theoretical basis for these calculations is the Multistep Direct ... -
Pre-paid water metering: social experiences and lessons learned from Klipheuwel pilot project, South Africa
(University of the Western Cape, 2006)This thesis examined a pre-paid water metering pilot project which was implemented in Klipheuwel , Cape Town, South Africa in 2001. It was anticipated that the implementation of pre-paid water meters would help improve the ... -
Predicting reptile species distributions and biogeographic patterns within Kruger National Park
(University of the Western Cape, 2018)Knowledge of global reptile ecology is limited and there remains much to understand in terms of detailed reptile species information, including that of their distributions. In South Africa, despite being one of SANParks ... -
Prediction of antimicrobial peptides using hyperparameter optimized support vector machines
(University of the Western Cape, 2011)Antimicrobial peptides (AMPs) play a key role in the innate immune response. They can be ubiquitously found in a wide range of eukaryotes including mammals, amphibians, insects, plants, and protozoa. In lower organisms, ... -
Predictors of design and adoption of collaborative elearning environments: a multi-method analysis
(University of Western Cape, 2020)Research has shown that collaborative eLearning can provide educational opportunities to groups of learners; both distance learners as well as traditional campus-based learners. It provides innovative educational methods ... -
Preferential flow modelling in a vadose zone using macro 5.0 - Cape Flats porous sands and Mpumalanga highveld clays case studies
(University of the Western Cape, 2008)Understanding fluid flow and solute transport within the vadose (unsaturated) zone is an essential prerequisite for protection of groundwater from contaminant sources occurring overland. Preferential flow paths in the ... -
Preferential flow modelling in a vadose zone using macro 5.0 – Cape flats porous sands and Mpumalanga highveld clays case studies
(2008)The objectives of this study were: To review and understand flow and transport processes in unsaturated zones. In this study, particular emphasis is placed on understanding mechanisms that cause non-uniform (preferential) ... -
Preliminary investigation of the natural contamination of agricultural crops with selected mycotoxins in northern rural South Africa (Limpopo and Mpumalanga Provinces)
(University of Western Cape, 2013)Subsistence farmers may contribute significantly to food production, food security, and employment in South Africa. However poor storage practices and contamination with mycotoxins, particularly fumonisins and aflatoxins ... -
A preliminary understanding of deep groundwater flow in the Table Mountain group (TMG) aquifer system
(University of the Western Cape, 2007)The Table Mountain Group (TMG) Aquifer is the second largest aquifer system in South Africa, after dolomites. This aquifer has the potential to be a signinficant source of water for the people of the Western Cape. The ... -
Premature aging of the lungs of the offspring induced by maternal nicotine exposure during gestation and lactation: protective effects of tomato juice
(University of the Western Cape, 2012)exposed to nicotine through the blood and the milk of the mother. Nicotine is thus expected to interact with the developing fetus and the offspring of mothers who smoke or use NRT for smoking cessation, resulting in the ... -
Preparation and characterization of highly active nano pt/c electrocatalyst for proton exchange membrane fuel cell
(University of the Western Cape, 2006)Catalysts play an essential role in nearly every chemical production process. Platinum supported on high surface area carbon substrates (Pt/C) is one of the promising candidates as an electrocatalyst in low temperature ... -
Preparation and electrospinning of chitosan from waste Black Soldier Fly biomass
(University of the Western Cape, 2018)Black soldier flies are important in sustainability because of their ability to voraciously degrade organic waste without constituting a nuisance to the environment. In South Africa, Agriprotein Ltd, a company producing ... -
Preparation and physico-chemical properties of nickel nanostructured materials deposited in etched ion-track membrane
(University of the Western Cape, 2005)The development of finely dispersed powders and superfine-grained materials intended for application in various areas of science and engineering is one of the challenges facing modern nanotechnology. Thus, specific fundamental ... -
The preparation of an immunosensor for the detection of microcystins and nodularins by immobilisation of a labelled antibody onto a polymer modified electrode
(University of the Western Cape, 2011)South African dams and reservoirs are increasingly showing the propensity to support sustained populations of Cyanobacteria (blue green algae). These photosynthetic bacteria occur throughout the world and can rapidly form ... -
The preparation of binuclear and polynuclear methyl complexes of palladium as catalyst precursors in phenylacetylene polymerization
(University of the Western Cape, 2007)This study focused on the development of binuclear and multinuclear catalyst for use in vinylic monomer oligomerization and polymerization. The main objective was to develop new homogeneous catalysts systems with hopefully ... -
Preparation, characterisation and evaluation of Artemisia afra phytosomes with modified release properties
(University of the Western Cape, 2017)Dissolution studies on various dosage forms (powder, tablets, teabags and alginate beads) of the Artemisia afra freeze dried aqueous extract (FDAE) all exhibit a rapid release profile. Generally, such a release profile may ... -
Prescribing practice at a tertiary level paediatric hospital in South Africa
(University of the Western Cape, 2014)The objectives of the present study were to describe the type and frequency of prescribing errors and error frequency, to determine the error frequency for different drug classes, to identify potential drug interactions ... -
The presence and concentration of antiretroviral drugs in different water bodies around the Western Cape
(University of the Western Cape, 2023)Concerns regarding the prevalence of chemicals from medicines and personal care goods, such as cosmetics, in streams and rivers have grown in recent years. Water quality experts and environmentalists are becoming increasingly ... -
Prestasiemotivering by studente aan die Universiteit van Wes-Kaapland.
(University of the Western Cape, 1991)The major objective of this study was to investigate the nature of the relationship between achievement motivation, autonomous and social achievement values, study habits and attitudes, locus of control and socio-economic ... -
Prevalence and characterization of Gardnerella vaginalis in pregnant mothers with a history of preterm delivery
(University of the Western Cape, 2012)Risk factors such as intrauterine and vaginal infection put pregnant women at risk for delivering preterm. Bacterial vaginosis (BV) is a polymicrobial clinical syndrome commonly diagnosed in women of reproductive age, with ...