部分糊化马铃薯淀粉颗粒及老化特性影响研究Study on the Effect of Partially Gelatinized Potato Starch Granules and Retrogradation Properties
于婷婷,雷鸣,刘宁,赵凯
摘要(Abstract):
以马铃薯淀粉为原料,在不同温度下对其进行处理,制备部分糊化淀粉,研究糊化度对淀粉颗粒及老化特性的影响。结果表明,随着处理温度升高,淀粉糊化程度提高,颗粒表面变得粗糙、凹陷,部分颗粒出现熔融、团聚等现象,偏光十字逐渐消失,且糊化程度越高,此现象越明显;X-射线衍射结果表明,随着糊化度提高,淀粉的结晶度逐渐降低至完全失去结晶结构,特征峰消失呈无定形状态;热焓特性分析表明,淀粉的糊化起始温度(T_o)、峰值温度(T_p)、终止温度(T_c)均随着糊化度的提高而升高,糊化焓(△H)随着糊化度提高而降低。随着温度和储存时间的增加,部分糊化淀粉老化度也不断提高,其T_o、T_p、T_c都有所上升,老化焓也有所增加,完全糊化淀粉具有最大老化焓,为部分糊化淀粉的2~3倍。
关键词(KeyWords): 马铃薯淀粉;糊化度;老化特性
基金项目(Foundation): 黑龙江省自然科学基金项目(LH2020C062);; 2021年哈尔滨商业大学教师创新项目支持计划
作者(Author): 于婷婷,雷鸣,刘宁,赵凯
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