Study on effect of ultrasonic treatment on GABA accumulation and antioxidant capacity in germinated brown rice

Using the organic brown rice as material,the effects of different ultrasonic treatment on the accumulation of GABA were studied and the appropriate ultrasonic treatment conditions were discussed,with different length of time and different frequencies of ultrasonic treatment being applied during several period of germinated brown rice growth. Result showed that during the early stage of germination(0 to 16 hours),ultrasonic treatment could have better contribution to the GABA accumulation than the middle(16 to 32 hours). In addition,using ultrasonic treatment during germination might increase the content of polyphenol. The ability to clean hydroxyl radicals of germinated brown rice which was treated by ultrasonic was 1.3 times greater than the one without ultrasonic treatment and the ability to clean superoxide anions was 10.34 percent better than the one without ultrasonic treatment.