淀粉
直链淀粉
回生(淀粉)
结晶度
化学
吸水率
辐照
马铃薯淀粉
核化学
溶解度
食品科学
化学工程
材料科学
有机化学
复合材料
结晶学
工程类
物理
核物理学
作者
Monika Sujka,Krystyna Cieśla,Jerzy Jamroz
出处
期刊:Starch-starke
[Wiley]
日期:2015-07-14
卷期号:67 (11-12): 1002-1010
被引量:14
标识
DOI:10.1002/star.201500113
摘要
Potato starch was modified with γ‐rays applying doses of 5, 10, 20 and 30 kGy. The effect of irradiation on starch structure was assessed on the basis of blue value (BV), A 680 /A 545 ratio, apparent amylose content and λ max . The results showed that modification of starch led to the reduction of all parameters connected with the starch‐iodine complex. The main effects of γ‐irradiation on starch granules revealed by scanning and transmission electron microscopies were cracks on the surface. Low‐temperature nitrogen adsorption data showed that modification with γ‐rays increased specific surface area and volume of mesopores and decreased their average diameter. DSC data indicated decreased crystallinity of starch and facilitated retrogradation taking place after irradiation in the 20% starch gels. Treatment with γ‐rays influenced also functional properties of potato starch increasing water absorption, least gelling concentration, solubility, paste clarity and susceptibility to α‐amylolysis, and decreasing fat absorption and viscosity.
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