Maillard Browning Reaction of D-Psicose as Affected by Reaction Factors

Abstract

This study examined the effects of temperature, D-psicose concentration, pH, and various amino acids on the Maillard browning reaction of D-psicose and glycine Mixture and compared browning color intensity with those of other sugars, such as sucrose, D-glucose, D-fructose, and D-tagatose. When D-psicose (0.1 M) and glycine (0.1 M) Mixture was heated at 70-100 degrees C for 5 hr, the absorbance at 420 nm increased with increasing reaction temperature and time. The Hunter a, b values, and color difference (Delta E) increased with increasing D-psicose concentration and pH within the range of pH 3-7 except at pH 6, while the L Value decreased. The rate of Maillard browning reaction was in order of D-tagatose>D-psicose = D-fructose>D-glucose>sucrose. The browning color intensity of the D-psicose-basic and non-polar amino acids mixtures was higher than that of the D-psicose-acidic amino acids.