Chemical interactions between thiamin and tannic acid. I. Kinetics, oxygen dependence and inhibition by ascorbic acid
Consumption of food high in tannins can cause thiamin deficiency. The interactions between tannic acid and thiamin were studied by allowing them to react at pH 7.5, 60 C, and determining free remaining thiamin by the thiochrome method and by recording changes in ultraviolet absorption profiles at in...
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th-mahidol.102932018-03-22T16:30:51Z Chemical interactions between thiamin and tannic acid. I. Kinetics, oxygen dependence and inhibition by ascorbic acid K. Rungruangsak P. Tosukhowong B. Panijpan S. L. Vimokesant Mahidol University Medicine Nursing Consumption of food high in tannins can cause thiamin deficiency. The interactions between tannic acid and thiamin were studied by allowing them to react at pH 7.5, 60 C, and determining free remaining thiamin by the thiochrome method and by recording changes in ultraviolet absorption profiles at intervals. The reaction was biphasic, having a rapid initial phase which was oxygen-independent, followed by a slower phase which was oxygen concentration-dependent. Ascorbic acid completely inhibited the reaction if present at the beginning of the reaction and could partially reverse the reaction if added during the first 30 min. 2018-03-22T09:29:47Z 2018-03-22T09:29:47Z 1977-12-01 Article American Journal of Clinical Nutrition. Vol.30, No.10 (1977), 1680-1685 00029165 2-s2.0-0017690049 https://repository.li.mahidol.ac.th/handle/123456789/10293 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0017690049&origin=inward |
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Medicine Nursing K. Rungruangsak P. Tosukhowong B. Panijpan S. L. Vimokesant Chemical interactions between thiamin and tannic acid. I. Kinetics, oxygen dependence and inhibition by ascorbic acid |
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Consumption of food high in tannins can cause thiamin deficiency. The interactions between tannic acid and thiamin were studied by allowing them to react at pH 7.5, 60 C, and determining free remaining thiamin by the thiochrome method and by recording changes in ultraviolet absorption profiles at intervals. The reaction was biphasic, having a rapid initial phase which was oxygen-independent, followed by a slower phase which was oxygen concentration-dependent. Ascorbic acid completely inhibited the reaction if present at the beginning of the reaction and could partially reverse the reaction if added during the first 30 min. |
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Mahidol University |
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Mahidol University K. Rungruangsak P. Tosukhowong B. Panijpan S. L. Vimokesant |
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Article |
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K. Rungruangsak P. Tosukhowong B. Panijpan S. L. Vimokesant |
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K. Rungruangsak |
title |
Chemical interactions between thiamin and tannic acid. I. Kinetics, oxygen dependence and inhibition by ascorbic acid |
title_short |
Chemical interactions between thiamin and tannic acid. I. Kinetics, oxygen dependence and inhibition by ascorbic acid |
title_full |
Chemical interactions between thiamin and tannic acid. I. Kinetics, oxygen dependence and inhibition by ascorbic acid |
title_fullStr |
Chemical interactions between thiamin and tannic acid. I. Kinetics, oxygen dependence and inhibition by ascorbic acid |
title_full_unstemmed |
Chemical interactions between thiamin and tannic acid. I. Kinetics, oxygen dependence and inhibition by ascorbic acid |
title_sort |
chemical interactions between thiamin and tannic acid. i. kinetics, oxygen dependence and inhibition by ascorbic acid |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/10293 |
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1763488021105082368 |