Abstract: The digestion and absorption quality of infant formula rice flour could be improved if technology of enzymolysis of rice flour was combined with traditional production of infant formula rice flour. α-amylase named AN30 was selected to hydrolyze rice flour to meet dietary demand of infant. The results showed that the optimal enzymolysis temperature forα-amylase was 60℃ with crude pH value of rice slurry and DE value in the range of 5% to 10% was obtained by adding 0.05% to 0.1% enzyme amount to rice mass and hydrolyzing 30min. α-amylase AN30 was found to be inactive by heating at 70℃ for 15min. The ratio of enzymolysis was increased with pre-gelatinization of rice slurry at 70℃ to 100℃. Digest index of the product which has not been hydrolysis is 83.6%,and which has been hydrolysis is 92.6%,the digest index increased by 10%. This will be more conducive to digestion and absorption of infants formula.
Key words: infant formula rice flour;α-amylase; hydrolysis; digestion inde