| The rice bran was treated by microwave in different ways, and the changes of acid value of rice bran oil was observed through room temperature storage test. The results showed that the acid value of rice bran oil from different sources of rice bran had different rising trends, which might be related to the activity of enzyme in rice bran.In the first stage storage test, the acid value of rice bran oil from rice bran 1# increased by 3.89 mgKOH/g in the first 2 d, and the acid value of rice bran oil from rice bran 3# improved by 17.4 mgKOH/g. However, the acid value of rice bran oil from microwave treated rice bran 1# only grew by 0.69 mgKOH/g in 5 d.In the second stage storage test, the acid value of rice bran oil from rice bran 4# without microwave treatment rose by 104.56 mgKOH/g after storage for 98 d, while its acid value just increased by 11.97 mgKOH/g when it was treated by microwave 7, while its acid value increased by 34.85 mgKOH/g when it was treated by microwave 4. So microwave treatment could help stabilize rice bran. |
