Amyloglucosidase hydrolysis of high-pressure and thermally gelatinized corn and wheat starches

The study of glucose production using amyloglucosidase as a biocatalyst was carried out using high-pressure and thermally gelatinized corn and wheat s tarches. For corn starch, the measured initial rate of glucose production o btained from thermal gelatinization is faster than that obtained from the t wo high-pressure treatments, but the equilibrium yield of glucose was found to be similar for the three treatments. High-pressure treatments of wheat starch significantly improve the equilibrium yield of glucose compared with those obtained from the thermally gelatinized wheat starch. This differenc e has been related to the formation of amylose-lipid complexes during heati ng and could also explain previous physicochemical differences observed bet ween high-pressure and thermally gelatinized starch.