摘要
Abstract
In this paper,the effects of electron-beam irradiation on the rheological properties and the molecular mass distribution of starches separated from irradiated wheat were investigated.The experimental wheat was irradiated with different irradiation doses（0,1.0,2.75,4.4kGy）.The analysis using the Brabender Viscoamylograph showed that with the increasing of irradiation doses,the Brabender peak viscosity of wheat starches decreased significantly and the cold stability increased,while the retrogradations were weakened.When the irradiation dose reached 4.4kGy,the peak viscosity reduced from 85.0BU to 42.0BU,decreased by 50.6%,the setback reduced by 88.2%.As determined by HPSEC-MALLS-RI,the molecular masses of wheat starches degraded gradually with increasing irradiation dose,when the irradiation dose upped to 4.4kGy the molar mass of starch decreased by one order of magnitude.The results indicated that the electron-beam irradiation made wheat starch degradation and lead to the changes of rheological properties and the decrease of viscosity of wheat starches.关键词
电子束辐照/小麦淀粉/粘度/流变特性/分子量分布Key words
electron-beam irradiation/wheat starch/viscosity/rheological property/molecular weight distribution分类
轻工纺织
