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当前位置: 首页 > 文章 > 微波前处理酶法制备微孔淀粉研究 安徽农业科学 2009,37 (33) 16221-16223
Position: Home > Articles > Study on Preparation of Microporous Starch by Enzymatic Method after Microwave Pretreatment Journal of Anhui Agricultural Sciences 2009,37 (33) 16221-16223

微波前处理酶法制备微孔淀粉研究

作  者：
李维杰;杨光;刘灿召;耿玮蔚;袁超
单  位：
上海理工大学食品与生物技术研究所
关键词：
微波;微孔淀粉;吸油率
摘  要：
[目的]提高微孔淀粉的吸附性能,缩短其生产时间。[方法]以玉米原淀粉为材料,对其施加40W/g的超声波处理10min,然后用α-淀粉酶和葡萄糖苷酶的pH缓冲液制备微孔淀粉,研究各因素对微孔淀粉吸油率的影响。[结果]其他因素固定不变,当反应温度为30℃时,微孔淀粉的吸油率最低,反应温度在50～55℃时,微孔淀粉的吸油率较高;缓冲液pH值在5.0～5.5时,微孔淀粉的吸油率较高,缓冲液pH值高于5.5时,微孔淀粉的吸油率急剧下降;当缓冲液pH值为5.0,反应温度为50℃,反应时间为12h,α-淀粉酶用量为75U/g,葡萄糖苷酶用量为46U/g时,微孔淀粉的吸油率最高,达132.8%。[结论]微波预处理可提高微孔淀粉的吸油率。
译  名：
Study on Preparation of Microporous Starch by Enzymatic Method after Microwave Pretreatment
作  者：
LI Wei-jie et al(Institute of Food and Biotechnology,University of Shanghai for Science and Technology,Shanghai 200093)
关键词：
Microwave;Microporous starch;Oil absorption ratio
摘  要：
[Objective] The study was to increase the adsorption properties of microporous starch,and shorten its production time.[Method] With native corn starch as the material,it was treated by ultrasonic with 40 W/g for 10 min,and then the microporous starch was prepared by pH buffer of α-amylase and glucosidase.The effects of factors on oil absorption ratio of microporous starch were studied.[Result]When other factors were fixed,the oil absorption ratio of microporous starch was the lowest when reaction temperature was 30 ℃ and it was higher when reaction temperature was 50-55 ℃.The oil absorption ratio of microporous starch was higher when pH value of the buffer was 5.0-5.5,but it was decreased sharply when pH value of the buffer was higher than 5.5.When pH value of the buffer was 5.0,reaction temperature was 50 ℃,reaction time was 12 h with α-amylase amount of 75 U/g and glucosidase amount of 46 U/g,the oil absorption ratio of microporous starch was the highest,reaching 132.8%.[Conclusion] Microwave pretreatment could increase the oil absorption ratio of microporous starch.

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