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KINETICS OF THERMAL DEGRADATION OF METHYLTETRAHYDROFOLIC ACID
Author(s) -
RUDDICK J. E.,
VANDERSTOEP J.,
RICHARDS J. F.
Publication year - 1980
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1980.tb07502.x
Subject(s) - arrhenius equation , chemistry , activation energy , reaction rate constant , degradation (telecommunications) , kinetics , ascorbic acid , order of reaction , reaction rate , oxygen , chemical kinetics , first order , organic chemistry , catalysis , mathematics , telecommunications , physics , food science , quantum mechanics , computer science
Thermal degradation of N 5 methyltetrahydrofolic acid (N 5 MTHFA) under various conditions was studied, using a radioassay method to measure N 5 MTHFA concentrations. In the presence of an unlimited oxygen supply, the degradation reaction could be described as pseudo first order. Reaction rate constants were found to increase with increasing reaction temperature. Conformity with the Arrhenius equation enabled calculation of the activation energy (7.10 Kcal mole −1 ). The overall reaction appeared to be second order in the presence of a limited oxygen supply. The presence of mercaptoethanol or ascorbic acid in the assay system delayed the beginning of the N 5 MTHFA degradation reaction but did not alter the reaction rate constants.