Optimization of Process for Preparing Pyrodextrin by Acid Thermal Method With Branched Enzyme Intervention
Resistant dextrin is a small molecule,low calorie dietary fiber,widely used in the food industry,with the largest market for health products,accounting for 38.7%.However,at present,the yield of resistant dextrin produced by high-temperature acid heating is generally low and there are many by-products.Research has been conducted on using low moisture corn starch as raw material and high-temperature acid heating method to prepare cyclodextrin.Through single factor experiments,the optimal process was determined,and the operating methods were refined.The acid absorption pre reaction process was added,and the yield could reach 61.9%.On this basis,starch branching enzymes were introduced to act on cyclodextrin and catalyze the conversion of α-1,4 to α-1,6 glycosidic bond,the conversion rate of 1,6 glycosidic bonds could reach 68.5%,the degree of glucose polymerization increased,and the resistance content was increased by 1.2%.
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