Jasmine white rice (Khao Dawk Mali-105) that used in this study was purchased from Chia Meng Company, Bangkok, Thai- land. It had an equivalent spherical diameter of 3.43 mm and true density of 1419 kg/m3. The turmeric extract powder was pur- chased from Specialty Natural Products Company, Chonburi prov- ince, Thailand. The white rice and turmeric extract powder were stored in a dark room at temperature of 4–6 C prior to an experiment.