Effect of Pretreatment Conditions on γ-Aminobutyric Acid Content of Brown Rice and Germinated Brown Rice

Effects of pretreatment conditions on acid (GABA) contents of brown rice and germinated brown rice were investigated. As steeping time increased, GABA contents of brown rices increased gradually. The highest GABA content, 3.33mg/100g, was found in brown rice steeped at for 8 hr. GABA content of brown rice decreased significantly at pH 8 (p, which was much higher than that of untreated brown rice. Anaerobic treatment of brown rices using gas increased GABA contents, ranging from . Germinated brown rice steeped in glutamate solution under anaerobic condition had GABA content of , two-fold higher than that of untreated brown rice, . Optimum pretreatment condition established in this study could significantly increase GABA content in germinated brown rice.