Effect of Adjusting the Water Activity to 0.95 with Different Solutes on the Kinetics of Thiamin Loss in a Model System |
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| Authors: | BEATRIZ FERNÁNDEZ LILIANA M MAURI SILVIA L RESNIK JOSEFINA M TOMIO |
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| Affiliation: | The authors are affiliated with PROIPA (CONICET-FCE y N), Depto. de industries, Facultad de Ciencias Exactas y Naturales, Univ. de Buenos Aires, (1428) Buenos Aires, Republica Argentina. Authors Fernaández and Resnik are a research fellow and member, of Comisidn de Investigaciones Cientificas de la Provincia de Buenos Aires;author Mauri is a research fellow of CONICET;and author Tomio is with Depto. de Quimica Biológica, Facultad de Ciencias, Exactas y Naturales. |
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| Abstract: | The kinetics of thiamin degradation in a model system of pH 6.0 and water activity (aw) 0.95 controlled with NaCl, KC1, glycerol or Na2SO4, was studied. The type of solute used to adjust aw, had a dramatic influence on the rate of degradation of thiamin. The loss of vitamin increased in the following order: NaCl > KCl > glycerol > Na2SO4. Activation energies, however, were independent of the type of solute and ranged between24–28 kcallmole. |
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