短时贮藏后油炸专用改性淀粉的初级结构变化Change of Primary Structure of Modified Starch for Frying after Short-Term Storage
郭希娟,郭鹏,李艳青,韩齐,陈洪生
摘要(Abstract):
以玉米淀粉为主要原料,将其用乳清蛋白、棕榈油进行改性处理获得复合物,分析油炸复合物贮藏期间的结构变化。结果显示,贮藏的前4 h,普通淀粉的过氧化值(peroxide value, POV)是复合物的1.69倍;复合物的粒径呈单峰分布,d_(4,3)缓慢减小,说明复合物结构变化速度减缓;T_(21)、T_(22)弛豫时间增加,表现为对结合水和不易流动水具有更好的持水作用;复合物在1 400 cm~(-1)和1 200 cm~(-1)波段处为单一特征峰,说明形成更多的疏水空腔,并且在1 743 cm~(-1)处波峰随着贮藏时间的延长而减弱,说明复合物减少,不饱和脂肪酸中ROOH分解成新的游离基R·。
关键词(KeyWords): 油炸;淀粉改性;结构;贮藏
基金项目(Foundation): 2021年度黑龙江省省属高等学校基本科研业务费科研项目(ZRCPY202109)
作者(Author): 郭希娟,郭鹏,李艳青,韩齐,陈洪生
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