酸解法青稞糊精理化性质及表征结构研究  

Study on the physicochemical properties and characterization structure of acid hydrolysis highland barley dextrin

作　　者：刘元靖 董丽雯 白佳怡 李思敏 张豫青 李梁 LIU Yuan-jing;DONG Li-wen;BAI Jia-yi;LI Si-min;ZHANG Yu-qing;LI Liang(Agricultural Products Processing Research Institute,Chinese Academy of Tropical Agricultural Sciences,Laboratory of Quality and Safety Risk Assessment on Agro-products Processing(Zhanjiang),Ministry of Agriculture and Rural Affairs,Zhanjiang 524001,Guangdong,China;Food Science College,Tibet Agriculture&Animal Husbandry University,R&D Center of Characteristic Agricultural Products in Qinghai-Tibet Plateau,The Provincial and Ministerial Co-founded Collaborative Innovation Center for R&D in Tibet Characteristic Agricultural and Animal Husbandry Resources,Nyingchi 860000,Tibet,China)

机构地区：[1]中国热带农业科学院农产品加工研究所,农业农村部农产品加工质量安全风险评估实验室(湛江),广东湛江524001 [2]西藏农牧学院食品科学学院,高原特色农产品研发中心,西藏特色农牧资源研发省部共建协同创新中心,西藏林芝860000

出　　处：《粮食与油脂》2023年第8期37-41,45,共6页Cereals & Oils

基　　金：农业农村部财政专项;农产品质量安全监管(风险评估)(GJFP20210502、GJFP20210503、GJFP20220206)。

摘　　要：采用酸解法制备青稞糊精,并对青稞淀粉和青稞糊精的理化性质、形貌结构、短长程有序结构、热特性和葡萄糖当量进行探究。结果表明:青稞淀粉的休止角、膨胀势、溶解率、析水率均大于青稞糊精,而青稞糊精的堆积密度大于青稞淀粉。扫描电子显微镜图像显示,青稞糊精展现出粗糙的表面、杂乱的微结构形态和更小的颗粒尺寸;红外光谱中发现青稞糊精在(1537±235)cm-1处产生了1个新峰,且青稞糊精的结晶度低于青稞淀粉;通过葡萄糖当量(DE)值可以发现,青稞糊精DE值明显高于青稞淀粉。The acid hydrolysis method was used to prepare highland barley dextrin,and the physicochemical properties,morphology structure,short and long range ordered structure,thermal properties and glucose equivalent of highland barley starch and highland barley dextrin were investigated.The results showed that the angle of repose,swelling potential,dissolution rate and water separation rate of highland barley starch were higher than those of highland barley dextrin,while the bulk density of highland barley dextrin was higher than that of highland barley starch.Scanning electron microscope images showed that highland barley dextrin showed rough surface,disordered microstructure and smaller particle size.In the infrared spectrum,a new peak of highland barley dextrin was found at(1537±235)cm,and the crystallinity of highland barley dextrin was lower than that of highland barley starch.The DE value of highland barley dextrin was significantly higher than that of highland barley starch.

关 键 词：青稞糊精 青稞淀粉 理化性质 表征结构 

分 类 号：TS236.3[轻工技术与工程—粮食、油脂及植物蛋白工程]