INFLUENCE of REACTION CONDITIONS ON the FORMATION of NONDIALYZABLE MELANOIDINES FROM D-FRUCTOSE and GLYCINE

The influence of the water content, molar ratio of reagents, time and temperature on the formation of nondialyzable melanoidines of the model system D-fructose-glycine has been studied. The rate constants of the reaction for molar ratios 2.5:1, 1:1, 1:2.5 have been calculated to be (2.38 ± 0.17) x 10−5 S−1, (3.94 ± 0.28) x 10−5 S−1 and (5.11 ± 0.36) x 10−5 S−1, respectively. The activation energy has been determined (105.0 ± 3.6) kJ/mol and (74.6 ± 7.1) kJ/mol for molar ratios 2.5:1 and 1:2.5, respectively.