Bibliography: pages 245-268. / Archaeological evidence reveals that a diet consisting of mainly of cereals, pulses and olives, supplemented by fish and with a low percentage of animal products, was consumed on Crete in the Minoan period, as it was up to this century. Modem clinical and biochemical research indicates that this traditional 'Mediterranean diet' offers certain nutritional and health benefits depending on the balances of the components - particularly relating to moderately high carbohydrate intake, low saturated (mainly animal) fatty acids and the presence of beneficial fatty acids of vegetable (especially olive) and fish origin. It has been demonstrated that intake of these latter fatty acids is associated with reduction in cardiac pathology and the development of visual and mental acuity in neonatal infants. Beneficial effects in certain cancers and auto-immune diseases are also being investigated. Lipid analyses of samples of Cretan olive oil and Aegean fish (identified taxonomically from faunal remains and Minoan frescoes) confirm good levels of both essential and other dietary fatty foods. An assessment of the nutritional benefits of the Minoan diet and its possible role in the development of Minoan Crete are investigated, using archaeological, demographic, biochemical and skeletal evidence.

<p>The aims of this study were therefore: 1) to test the suitability of various seaweed-based diets against that of the formulated feed Abfeed&reg / -S34 on the growth of the abalone H. midae / and 2) to compare the growth of H. midae fed protein-enriched U. lactuca as opposed to those fed wild, naturally low protein U. lactuca in both single-species and mixed feeds.</p>

<p>The aims of this study were therefore: 1) to test the suitability of various seaweed-based diets against that of the formulated feed Abfeed&reg / -S34 on the growth of the abalone H. midae / and 2) to compare the growth of H. midae fed protein-enriched U. lactuca as opposed to those fed wild, naturally low protein U. lactuca in both single-species and mixed feeds.</p>

Magister Scientiae - MSc / The direct methanol fuel cell or DMFC is emerging as a promising alternative energy source for many applications. Developed and developing countries, through research, are fast seeking a cheap and stable supply of energy for an ever-increasing number of energyconsuming portable devices. The research focus is to have DMFCs meet this need at an affordable cost is problematic. There are means and ways of making this a reality as the DMFC is found to be complementary to secondary batteries when used as a trickle charger, full charger, or in some other hybrid fuel cell combination. The core functioning component is a catalyst containing MEA, where when pure platinum is used, carbon monoxide is the thermodynamic sink and poisons by preventing further reactions at catalytic sites decreasing the life span of the catalyst if the CO is not removed. Research has shown that the bi-functional mechanism of a platinum-ruthenium catalyst is best because methanol dehydrogenates best on platinum and water dehydrogenation is best facilitated on ruthenium. It is also evident that the addition of other metals to that of PtRu/C can make the catalyst more effective and increase the life span even further. In addition to this, my research has attempted to reduce catalyst cost for DMFCs by developing a low-cost manufacturing technique for catalysts, identify potential non-noble metal catalytic systems and develop a basic process to combine various non-noblel, less expensive metallic systems to form binary, ternary and quaternary catalysts. The initial research focused on the identification of a suitable Pt/C preparation method, and characterization of the resulting catalysts by electrochemical methods (including voltammetry), elemental analysis (by EDS), and morphological characterization (by TEM). Once the preparation method for Pt/C had been established, binary (Pt–M/C), ternary (Pt–M1M2 /C) and quaternary (Pt–M1M2M3 /C) catalysts were prepared by modifying the initial Pt/C preparation method. These multi-metallic catalysts primarily function in preventing CO poisoning and allowing MeOH oxidation at the anode. To determine the effectiveness of the in-house multi-metallic catalysts the catalysts were then compared to the commercially available bench mark JM commercially available catalyst. Cyclic voltammetric and chronoamperommetric analysis revealed that the in-house catalysts electrochemical catalytic activity were similair to that of the commercially available catalysts. The Fuel application testing revealed similair trends to that of the EC activity at 0,5V (Ag/AgCl) test results, with the quaternary catalyst proving to be the most active anode catalyst producing the highest power density. The quaternary catalysts proved to be superior with its increased mass activity and high surface area (80% of the catalytic particles < 3nm). / South Africa

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Thesis (M.A.)--University of Missouri-Columbia, 2003. / Typescript. Vita. Includes bibliographical references (leaves 89-102). Also available on the Internet.

Thesis (M.A.)--University of Missouri-Columbia, 2003. / Typescript. Vita. Includes bibliographical references (leaves 89-102). Also available on the Internet.

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