Kinetic study on colour changes in wheat germ due to heat Original Research Article

Colour change during infrared heating of wheat germ was studied at 100–150°C for 5–40 min. An increase in L values and a decrease in a values were observed at increased time and temperature of heating. Scattered data were obtained for the b values. Results showed that the L and a values can be successfully modelled using a third-degree polynomial equation, which can be used to estimate the colour changes during heating. The activation energy for the colour changes in wheat germ, based on the L values, was found as 36.6 kJ/mol.