Kinetic Study on High Temperature Cooking of Polished Rice in a Pressure Pot

Abstract

Cooking rates of polished rice in a pressure pot were measured at high temperatures from 110 to 133°C. The cooking rate was evaluated from the gelatinization degree of rice starch measured with a enzyme method. The Arrhenius plots of cooking rate constant showed a good linear elationship, and the activation energy was 38.1kJ/mol. The cooking times for isothermal cooking process of polished rice at 110, 120, and 30°C were estimated at about 11, 8, and 6min, respectively.