低温/中温花生粕蛋白的理化特性及结构特性分析Analysis of Physicochemical and Structural Chracteristics of Low-Temperature/Medium-Temperature Peanut Meal Protein
张彤,冯雨禾,戚朝霞,郭浩,曾里,贾利蓉,段飞霞,冉旭
摘要(Abstract):
对低温/中温花生粕的感官色差、功能特性和结构特性进行了研究和分析,旨在为提高花生粕的综合利用价值提供理论基础。结果表明,低温花生粕呈象牙色,中温花生粕呈灰白色。从功能特性上来看,低温/中温花生粕蛋白的持油性、乳化性和泡沫稳定性无显著性差异。低温花生粕蛋白具有更好的溶解度、起泡性、持水性、热稳定性,中温花生粕蛋白具有更好的乳化稳定性。进一步通过分子量、二级结构、DSC对蛋白质结构进行分析,低温花生粕和中温花生粕蛋白质二级结构主要是β-折叠、β-转角,中温花生粕蛋白变性程度更高,低温花生粕的蛋白结构相对更松散。低温花生粕蛋白具有更高的变性温度和热焓值,且具有更好的热稳定性。
关键词(KeyWords): 低温花生粕;中温花生粕;功能特性;结构特性
基金项目(Foundation): 四川大学青岛研究院“8122计划”项目(21GZ30201)
作者(Author): 张彤,冯雨禾,戚朝霞,郭浩,曾里,贾利蓉,段飞霞,冉旭
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