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。
[ 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 mieroporous 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 mieroporous 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 mieroporous starch was the highest, reaching 132.8%. [ Conclusion ] Microwave prctreatment could increase the oil absorption ratio of microporous starch.
出处
《安徽农业科学》
CAS
北大核心
2009年第33期16221-16223,共3页
Journal of Anhui Agricultural Sciences
基金
上海市科技攻关重点项目(08521102000)
上海市自然科学基金项目(08ZR1415200)
关键词
微波
微孔淀粉
吸油率
Microwave
Microporous starch
Oil absorption ratio
