The bioavailability of vitamin B-6 from four selected foods was investigated in five men, aged 22 to 25 years, who were receiving a pyridoxine supplement. The subjects received a constant diet containing 1.34 mg of vitamin B-6 throughout this five-week study, except on Saturdays and Sundays when they ate their self-chosen diets. Starting on day 6 of week 1, following a five-day adjustment period, the subjects received orally 5-mg crystalline pyridoxine supplement daily, except on Tuesday and Thursday of each week. On these two days, the subjects were given orally 0 mg or 2 mg of crystalline pyridoxine, or test doses of bananas, filberts, soybeans and beef which contained around 2 mg of vitamin B-6. Vitamin B-6 was determined by microbiological assay with Saccharomyces uvarum. Vitamin B-6 bioavailability in the test food was determined by comparing 24-hour urinary total vitamin B-6 in response to the test food doses to that excreted following a 2-mg crystalline pyridoxine dose in each subject. Compared to the 100 percent bioavailability of the 2-mg crystalline PN dose, the average vitamin B-6 bioavailability in bananas was 115 + 32% and that in filberts, soybeans and beef was 93 + 8%, 73 + 20% and 87 + 7%, respectively. The metabolism of vitamin B-6 in pyridoxine-supplemented subjects was also investigated by measuring changes in plasma total vitamin B-6 which increased and was stablized after three weeks of pyridoxine supplementation. It was concluded that urinary total vitamin B-6 in pyridoxine-supplemented subjects can be used as a measure of vitamin B-6 bioavailability from test food doses. / Graduation date: 1983

Thesis (Ph. D.)--University of Queensland,2001. / Includes bibliographical references.

Thesis--PlanA (M.S.)--University of Wisconsin--Stout, 2003. / Includes bibliographical references.

No description available.

The objective of this study was to determine Thai women's nutrition awareness of folic acid and its role in the prevention of neural tube defects. Three hundred and two Thai women between 18-45 years completed a 30 itemized survey. There was a significant lack of nutrition awareness of folic acid. Many women (n= 274; 91.9%) had not heard of neural tube defects (NTD) and only 8.1 % (n=24) had heard of spina bifida/NTD. More than 50% (n=176) were unaware of NTD. Only 11.6% of the women (n=35) thought consuming vitamins during pregnancy would reduce the risk of birth defects. More than 80% of the women reported the best time to take folic acid supplement was during pregnancy. Less than 20% of the women indicated taking folic acid supplement before or after pregnancy. In this population, nutrition awareness of folic acid was minimal. / Department of Family and Consumer Sciences

The aim of this study was to characterize the fat composition of camel milk fat and camel hump fat and thereby assist in the technological development of camel milk and meat based products. The latter is of major interest in parts of Africa where the camel resides in large numbers. A combination of silver-ion and reversed phase HPLC enables the isolation of triglycerides according to their saturation class and carbon number. Subjection of the isolated triglycerides to enzymatic splitting with lipase and subsequent analysis of the free fatty acids generated enables a positional analysis of the main triglyceride components and thus a characterization of the fat. The analytical techniques employed may equally well be applied to other fats or oils to allow their characterization.

Graduation date: 1978

Thesis (M. Consumer Science (General))(Natural and Agricultural Science)) -- University of Pretoria, 2007. / Includes bibliographical references. Available on the Internet via the World Wide Web.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis--University of Wisconsin--Madison. / Typescript. Vita. Includes bibliographical references.