Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 39 for “"Thiamin"”.
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Exploring Prokaryotic Thiamin Biosynthesis: Mechanistic Studies On Thiamin Thiazole Synthase And Pyrimidine Synthase
Thiamin (Vitamin B1) is made from a coupling a thiazole and a pyrimidine unit, which are assembled separately. Studies have shown that the biosyntheses of thiazole and pyrimidine are different in prokaryotes versus eukaryotes. Understanding of thiamin biosynthesis is still incomplete and a lot of …
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Investigation of the Evolutionary Aspects of Thiamin Diphosphate-Dependent Decarboxylases
Thiamin diphosphate (ThDP)-dependent enzymes catalyze a wide range of reactions including the oxidative and nonoxidative decarboxylation of 2-keto acids, carboligation reactions, the cleavage of C-C bonds, and the formation of C-S, C-N, and C-O bonds. Surprisingly, given this diversity, all …
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Genetic Engineering of Plant Seeds to Increase Thiamin (Vitamin B1) Content
Thiamine (Vitamin B1) in the form of thiamine pyrophosphate (TPP) is an essential cofactor for the function of numerous enzymes which are involved in central metabolism such as citric acid cycle, pentose phosphate pathway, Calvin cycle, isoprenoid biosynthesis, and branched-chain amino acid …
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Effect of cultivar, storage, cooking method and tissue type on the ascorbic acid, thiamin, riboflavin and vitamin B6 content of sweetpotato [Ipomoea batatas (L.)] Lam
… and cooking method on the ascorbic acid (AA), thiamin, riboflavin, and vitamin B6 content of sweetpotato was determined. A simplified and sensitive reverse-phase high performance liquid chromatography (HPLC) methodology was developed for the simultaneous determination of thiamin and riboflavin …
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Insights into structure, dynamics of thioredoxin reassembly and dynein light chain 8 and ionization states of thiamin cofactor by MAS NMR spectroscopy
… 4. Second, ionization and tautomeric states of thiamin diphosphate cofactor (ThDP) in large protein, ThDP-dependent family of enzymes are probed using MAS NMR spectroscopy, described in Chapters 5 and 6.
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The effects of a walking program on aerobic fitness, riboflavin and thiamin status, and birth outcome in pregnant women taking vitamin-mineral supplements
… wk gestation, on aerobic fitness, riboflavin and thiamin status, and birth outcome were studied in 28 healthy, pregnant women, 24-36 yr of age, receiving vitamin-mineral supplements. Aerobic capacity was evaluated by measurements of heart rate (HR) and relative oxygen consumption (VO₂, ml/kg/min) …
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The Relationship between Chemical Leavening Agents and Three Gastric Indices in Rats Subjected to Restraint Stress
… receiving the chemically-leavened diet.</p> <p>Thiamin and riboflavin-retention analyses done on various baked products produced conflicting results. Yeast-leavened products retained less thiamin and riboflavin than chemically-leavened products, but which chemical leavening agent was best for …
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The Relationship of Some Psycho-Social Factors to Food Consumption Behavior of Selected Married Men
… calcium, iron, vitamin A, vitamin C, and thiamin were all greater than 100 percent RDA as were intakes of all these nutrients except thiamin (89% RDA) for males 23 to 50 years of age. No relationships were found between dietary quality and the food consumption variables of frequency of …
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Studies on the Proteolytic Activation of the Membrane Enzyme, Pyruvate Oxidase
… presence of substrate, pyruvate, and cofactor, thiamin pyrophosphate, is required for proteolytic activation to occur. The enzyme is proteolytically inactivated in the absence of thiamin pyrophosphate regardless of the flavin oxidation-reduction state. Activation by endopeptidases such as …
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Studies on the Mechanism of the Pyruvate Oxidase Flavoprotein of Escherichia Coli (Rapid Kinetics, Biochemical Software, Lipid-Activated Enzyme)
… carbon dioxide. Flavin adenine dinucleotide and thiamin pyrophosphate are cofactors. The enzymatic activity of the purfied flavoprotein is very low in the absence of lipids. Following reduction by substrate, lipids and many other other amphiphilic substances bind to a high affinity site on the …
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Effects of pasteurization and refrigerated storage on the quality of precooked beef
… smokehouse cooling procedures (P $>$ 0.05) for thiamin retention and meat composition. A pasteurization process was established for steaks obtained from waterbath precooked roasts. Steaks were pasteurized using three different waterbath temperatures. Texture profiles of precooked steaks were …
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Maternal nutrition, breast milk micronutrients and infant growth in rural Gambia
… supplementation on breast milk iodine, thiamin, riboflavin, vitamin B6 and B12 was explored. Supplementation during pregnancy positively influenced maternal status for all investigated micronutrients, and modestly increased breast milk iodine and riboflavin concentrations across the …
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The influence of formulation and processing on the retention of B vitamins in Asian noodles
… of Asian noodles. Secondly, the stability of thiamin, riboflavin, folate and vitamin B-6 during processing of noodles has been investigated.
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Biochemical and genetic characterization of mercaptopyruvate sulfurtransferase and paralogous putative sulfurtransferases of Escherichia coli
… whereas ThiI is necessary for biosynthesis of thiamin and 4-thiouridine in transfer ribonucleic acid. These observations led to the hypothesis that sulfurtransferases might be involved in sulfur transfer for biosynthesis of some sulfur-containing cofactors (e.g., biotin, lipoic acid, thiamin …
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Nutrition services in adult day cares in Texas
… A, B6, B12, C, D, E, Folate, Niacin (B3), Thiamin (B1), Riboflavin (B2), as well as the minerals Calcium, and Zinc.
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Studies on the production, chemical composition and nutritional value of mushroom
… dense in protein, iron, magnesium, phosphorus, thiamin, riboflavin, niacin, and vitamin C.
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