结晶度
辐照
乙酰化
直链淀粉
化学
回生(淀粉)
淀粉
傅里叶变换红外光谱
γ辐照
核化学
食品科学
生物化学
化学工程
结晶学
基因
物理
工程类
核物理学
作者
Xiangli Kong,Xin Zhou,Zhongquan Sui,Jinsong Bao
标识
DOI:10.1016/j.ijbiomac.2016.06.072
摘要
Effects of gamma irradiation on the physicochemical and crystalline properties of the native and acetylated wheat starches were investigated. Peak, hot paste, cool paste and setback viscosities of both native and acetylated wheat starches decreased continuously and significantly with the increase of the irradiation dose, whereas breakdown viscosity increased after irradiation. However, gamma irradiation only exerted slight effects on thermal and retrogradation properties of both native and acetylated wheat starches. X-ray diffraction and fourier transform infrared spectroscopy revealed that acetylation modification had considerable effects on the molecular structure of wheat starch, and the crystallinity of both untreated and acetylated starches increased slightly with the increase of irradiation dose. However, the V-type crystallinity of amylose-lipid complex was not affected by gamma irradiation treatments with doses up to 9kGy.
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