The Effect Of Ultra-high Pressure (Uhp) Treatment On Material Characteristics Of Oat Convenient Rice

The objective of the study is to evaluate the effect of different ultra-high pressure (UHP) and different time treatment on sterilization,deactivating enzyme and starch conversion of oat and rice.Three factors of UHP treatment and time treatment which are300MPa,400MPa,500MPa,600MPa and5min,10min,15min,respectively are investigated. With the total number of bacterial colony as index,the optimum UHP trearment and time treatment process is optimized optimized with the test as follows:pressure of600MPa,time of5min and the above conditions,the total number of bacterical colony is less than10cfu/g.with the activity of enmyze as index,the experiment is performed as follows:when the pressure is300-500MPa and time is0-15min,pressure passivation lipase response can fit the level1dynamic midel,accurately:when the press is above600MPa and time is5min,97.5%of the lipase of oat has not activity and more than92%of hydrogenperoxidase is inactive.With the starch conversion as index,the test is following:when the pressure is600MPa and the time is5min,rice pasting rate is increasing75.40%,the time of reaching85%rice pasting decreases46.1%,in the process of pasting,the heat of absorbing reduces42.76%.The sensory quality of oats and rice of high pressure treatment is significantly higher than the untreated samples,and the major qualitie are the even color of rice,glossy,no cracking,good taste and flexibility of the rice.