PRODUCTION OF MALTOSE HAVING LOW OLIGOSACCHARIDE CONTENT AND ITS REDUCTION PRODUCT

摘要

PURPOSE:To obtain easily pulverizable maltose having low oligosaccharide content and its reduction product by saccharifying liquefied starch with maltogenic-alpha-amylase under specific condition. CONSTITUTION:An aqueous solution of starch having a concentration of 5-40wt.% is liquefied with a liquefaction enzyme and the enzyme is inactivated at a dextrose-equivalent of <=15. The obtained liquid is treated with beta-amylase and pullulanase and/or isoamylase and, simultaneous to or within 36hr after the start of the enzymatic action, treated with maltogenic-alpha-amylase to effect the saccharification of the starch. Within 1-48hr from the start of the saccharification process, 1-20 units (based on 1g of the solid component of the substrate) of a liquefaction enzyme is added to the system to obtain a saccharified product having a maltose contact of 70-90wt.% (based on the solid component) and an oligosaccharide content (calculated by the formula I) of <=7.