Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 54-60). Also available on the World Wide Web.

Thesis (M.A.)--San Francisco State University, 2002. / Includes bibliographical references (leaves 19-23).

Thesis (M.A.)--San Francisco State University, 2002. / Includes bibliographical references (leaves 36-40).

Thesis (Ph. D.)--University of Washington, 2007. / Vita. Includes bibliographical references (leaves 52-61).

Thesis (M.S.Ed.)--Baylor University, 2006. / Includes bibliographical references (p. 87-98).

M.Tech. (Engineering: Chemical) / South Africa has the second largest fluorspar reserves in the world, but about 95% of the mined fluorspar is exported without local beneficiation that would otherwise increase foreign exchange earnings., Creamer Mining Weekly G-Other Trade Topic- Investment, (2005). The first step of a possible local beneficiation process would be the feeding of fluorspar solid from a hopper fitted with a screw feeder, using nitrogen gas to transport the powder into a non-transfer plasma reactor system. This study had as a main goal the optimization of the applicable continuous feeding parameters. The objectives of the investigation were: (a) Evaluation of the feeding system. (b) Evaluation of pumping/vacuum generation requirements. (c) Evaluation of the effect of using solid powder with non - uniform particle size. (d) To develop a model to enable the design and preliminary costing of a fullscale plant. Tests were performed in a test rig constructed for this purpose using different pipe diameters and nitrogen flow rates for the transport of the powder. It was found that the level in the hopper would have to be kept constant or a control system would have to be implemented in order to maintain a constant powder feed rate. In addition, a model was developed for the transport of the powder, and was used to optimize the pipe diameter required. An initial estimate of the operating cost and earnings of a possible full scale plant indicated that the beneficiation process would be very profitable. It is therefore suggested that this process be investigated further for conditions closer to the optimum modelled in a mini-pilot plant operation that includes the plasma reactor system in preparation of full scale implementation

This study was undertaken to determine the effect of protein and wheat germ oil supplements upon selected measures of junior high school boys. The measures selected were for weight, arm strength, speed and endurance, and urinalyses for urea nitrogen. Thirty-six ninth grade athletes at Memorial Junior High School in Alice, Texas, were used as subjects. The subjects were placed in three groups of twelve each with one group receiving the supplements and the other two groups serving as control groups.

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Nutritional supplements are a combination of complementary medicines and functional foods. While research suggests that the usage of nutritional supplements is increasing worldwide, the growth of the industry is being hampered by a lack of understanding on the part of consumers. The main aim of this study was to determine the usage pattern of nutritional supplements amongst University of KwaZulu-Natal (UKZN), Masters of Business Administration (MBA) students registered in 2011. Research data for this study was obtained by surveying UKZN MBA students. From a population of 250, a probability sample of 152 responses was statistically analysed for the research. Quantitative data obtained from a questionnaire was used and analysed to meet the study’s objectives. A salient finding of the study was that there is an “uptapped” market amongst Black consumers that the nutritional supplement businesses should target. The study revealed that the majority of the respondents did not fully understand the benefits of nutritional supplements. The overall results of the study revealed the usage patterns of nutritional supplements amongst UKZN MBA students. The results also identified which population group and which gender consumed nutritional supplements. This study could assist nutritional supplement businesses to gain market share. The results can be used to formulate marketing strategies and to provide businesses with a competitive advantage. The recommendations of the study were that growth in the nutritional supplement industry could be achieved by targeting the Black market and that additional marketing campaigns were needed to educate and inform consumers about the benefits of nutritional supplements. / Thesis (MBA)-University of KwaZulu-Natal, Durban, 2012

The present study investigated whether vitamin E supplementation reduced oxidative stress in erythrocytes and improved vitamin E status in patients undergoing hemodialysis (HD). Plasma and erythrocyte α-tocopherol, plasma ascorbic acid, and iron status were determined in 11 regular HD patients prior to and post-dialysis, before and during oral supplementation of vitamin E, 400 IU daily for two months. HD patients were categorized into two groups according to their plasma ascorbic acid levels. We found that only the vitamin C sufficient group (>40 μM, Group I) had reliable measurements of erythrocyte α-tocopherol concentrations before vitamin E supplementation. In Group I prior to dialysis, erythrocyte α-tocopherol concentrations increased in response to vitamin E supplementation from 6.7 ± 0.7 μmol/L packed cells to 9.8 ± 0.6 (μmol/L packed cells (p<0.04). Moreover, there was a positive correlation (p<O.001) between plasma and erythrocyte α-tocopherol levels in Group I subjects. Additionally, vitamin E supplementation significantly increased hematocrits (39.9% ± 1.9% to 42.3% ±1.6%, p<0.004) post-dialysis only in Group I subjects. On the contrary, there was no change in hematocrits during vitamin E supplementation in the vitamin C deficient group (<40 μM, Group II). With respect to measures of iron status and recombinant human erythropoietin (rHuEPO) dose, no differences between before and during vitamin E supplementation were observed in two groups ofpatients. In summary, our data suggest that oral vitamin E supplementation protected erythrocytes from oxidative stress and improved vitamin E status in HD patients, but only in patients with adequate vitamin C status. / Graduation date: 2003