Abstract: Using cellulase and xylanase to degrate the corn bran which is treated by amylase and protease,water-soluble dietary fiber could be obtained. The orthogonal test was adopted to explore the best technological conditions of enzymolysis process,in order to enhance the conversion rate of water insoluble dietary fiber that the result indicated that the optimal enzymolysis conditions are as follows: temperature 45℃,pH 4.8,solid-liquid ratio 1:12,enzymolysis time 8 h,and addition amount of cellulase and xylanase 1% and 0.3 % respectively. The maximum conversion rate of water insoluble dietary fiber reaches 6.57%. The addition amount of cellulase has the most significant influence to the experimental result. 更多还原

Key words: corn bran, cellulose, xylanase, soluble dietary fiber