Theses and dissertations (Applied Sciences)
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Item Cross-linking of saturated long-chain hydrocarbons(1999) Ishripersadh, Kogilambal; Luyt, A. S.; Timm, Delysia NorelleSaturated long chain hydrocarbons, such as paraffin waxes, have a large variety of applications. These applications may, however, be restricted by certain properties of the wax such as brittleness and in compounding. Cross-linking of the long chains in waxes may provide improved physical properties and hence a wider application of these waxesItem Criteria based academic and vocational predictor elements for student selection in the National Diploma of Food Service Management programme(1996) Koen, Pauline Anne; Coertze, Dirk J.As tertiary institutions, technikons are in the fortunate position that there is a demand for their educational programmes among prospective students, and an equally positive demand for technikon diplomates from the relevant industries who require skilled manpower. Unfortunately resources are limited and thus technikons cannot admit all the applicants who apply for the various courses. For this reason it has become essential to select only those candidates who are most likely to complete the educational training programmes, and fit successfully into the job market. When the value and nature of technikon education are compared to those of a university education, it seems appropriate that their respective students should possess different qualities and abilities, which should be accommodated in the selection criteria governing enrolment.Item The design and development of software simulating interactive marine radar and electronic navigation instruments based on a PC platform(1999) Cox, Kieron Michael Tesling; Stewart, M. J. M.This study was intended to develop suitable software to emulate Marine Radar and other Electronic Navigation Systems found on Merchant,vessels. This equipment includes Radar with or without Automatic Radar Plotting facilities, Navstar Global Positioning Systems, Echo Sounders, Radio Direction Finder as well as Decca Navigator. Certain of these aids are required in the Radar Simulator Specifications [ref 1] to which the SAMSA - South African Maritime Safety Authority (formerly the South African Department of Transport) adheres. SAMSA is the authority which approves Maritime training and Simulators in South Africa in compliance with International standards as laid down by, IMO - International Maritime Organisation.Item Development of objectives for an educational programme to improve consumer knowledge of and attitudes towards nutritional information on food labels(1994) Anderson, Diana Jane; Coertze, Dirk J.Much attention has been given to the prevalence of diseases related to over-consumption of food, with nutritional labelling playing an increasingly prominent role in the prevention and reduction of these diseases. The development of technology and the subsequent availability of processed food have greatly contributed to these diseases, and created gaps in both distance and concept between the consumer and the manufacturer. An increasing number of food manufacturers are providing nutritional information regarding their products in order to maintain their position in the market; however, this avalanche of information is outstripping the ability of the consumer to use it effectively or to even comprehend it. This study was undertaken to identify the objectives needed for the formulation of an educational programme concerning the nutritional labelling of food containers.Item The role of tissue kallikrein in helicobacter pylori-associated gastric disease(1999) Naidoo, Strinivasen; Bhoola, K. D.Today, the number one income-generating drugs are remedies prescribed for gastric disorders, in particular dyspepsia. These clinical conditions have a multi-faceted aetiology and pathology of dysfunction. One likely causal factor is the entero-pathogen Helicobacter pylori. It has been shown to be more than just a commensal related to gastric diseases like dyspepsia (80-90% incidence) and duodenal ulcer sufferers (100% incidence), with a total estimated world-wide population infection of 50%. The current therapy offered to dyspepsia sufferers is a triple regimen of an anti-bacterial, an Ir proton-pump inhibitor, and bismuth colloidal salts.Item The development of a method for the analysis of Mahewu(1994) de Goede, Richard Goodwin; Adamson, J. H.; Neethling, D. N.A comparison was made of various methods for the analysis of the odoriferous components of Mahewu, a fermented mealie meal porridge. The most satisfactory procedure was found to be that of dynamic headspace sampling. This technique, used in conjunction with gas chromatography and mass spectrometry, allowed the positive identification of several components .Item An environmental study to examine the distribution of selected airborne metals in the greater Chatsworth area(1999) Govender, Suendharan; Pillay, Visvanathan LingamurtiThe purpose of this study was to determine the distribution of selected metals in the atmosphere of the greater Chatsworth area. Six primary schools in the area were selected for the investigation. Two high volume air samplers were placed at one ofthe sites from 7hOOto I5hOO on school days. The filter assembly on which air particulates were collected was placed at a height of 1.45 m's above the ground. The vacuum pumps were preset to start and switch off at the selected times. Sampling was done for seven days from February to June and again for seven days from July to November at each of the six sites.Item A study to identify a feasible route for the production of the monomer 2-vinylfuran from furan by evaluating the effect of variables on the final yield and to recommend suitable conditions applicable to the chemical industry(1992) Gengan, Robert Moonsamy; Reimann, R. H.2- Vinylfuran has been synthesised from furan, obtained from furfural a degradation product of bagasse, and has the potential to be used as a monomer in the Polymer Industry. Furan was successfully reacted with ethylene under catalytic conditions of palladium (II) acetate and copper (II) acetate to produce 2-vinylfuran, via a direct substitution reaction, at atmospheric pressure and a temperature of 9Y C for two hours in dimethylformamide.Item A study of South African strains of the sugarcane mosaic potyvirus (SCMV) identified by sequence analysis of the 5' region of the coat protein gene(1999) Goodman, Bernadette; Huckett, Barbara IsobelSugarcane mosaic potyvirus (SCMV) IS the causal agent of the most important viral disease of sugarcane in South Africa, mosaic. Accurate knowledge of the prevalent SCMV strain(s) in the South African sugar industry is lacking and has never been determined using molecular analysis. Identification of SCMVstrains at the genomic level would provide valuable information for the development of appropriate in vitro diagnostic tests and in the genetic engineering of sugarcane for coat protein (CP) mediated resistance.Item The isolation, identification and characterisation of the causative agent involved in the "paralysis syndrome" and the implementation of suitable control measures(1999) Govender, Mogambery Kisten; Kasan, Hamanth C."Paralysis syndrome" was first described by Dr M.J Versveld in 1993. The disease appeared to be confined to the Natal area with a few sporadic outbreaks in Gauteng, but none in the Cape region, nor in non-Rainbow flocks. The syndrome tended to re-appear on affected farms but not necessarily in the same houses. There was no correlation between affected flocks and their parent flock or hatchery identity (Maharaj, pers.comms.1994).