甜玉米胚乳中水溶性葡聚糖的结构与性质初探  

Study on structure and properties of water - soluble glucan from maize endosperm

作　　者：李蓉[1] 缪铭[1] 张涛[1] 江波[1] 

机构地区：[1]江南大学食品科学与技术国家重点实验室,江苏无锡214122

出　　处：《食品工业科技》2012年第23期57-59,65,共4页Science and Technology of Food Industry

基　　金：国家自然科学基金项目(20976073);江苏省科技支撑项目(BE2010717);江南大学食品科学与技术国家重点实验室自主科研项目(SKLF-TS-201117)

摘　　要：针对从甜玉米胚乳获得一种新型葡聚糖,采用Zeta电位/粒径仪、傅立叶红外光谱仪、高效液相色谱、体外模拟消化等现代分析方法来测定其结构参数与功能性质。研究结果表明,该类葡聚糖溶于水,其颗粒尺寸在30～100nm范围内,属于典型的纳米微粒,具有伯醇、仲醇羟基的α-D-吡喃环等类似于淀粉空间结构的特征,其分子量分布呈单一峰,重均分子量为1483250,聚合度DP为9155.9,在体外模拟消化条件下其生物降解速率远低于蜡质玉米淀粉。The structure and properties of water-soluble glucan from mutant maize endosperm were investigated through Zetasizer Nano, high performance liquid chromotagraphy （ HPLC）, infrared spectrum （IR） and other modern analytical methods.Results showed that the particle sizes of the glucan were ranged from 30-100nm.The structure of water-soluble glucan which had co-D-pyranose ring structure with hydroxyl group of primary alcohol and secondary alcohol were analogous to that of starch.Plot of molecular weight distribution had a single peak.The weight-average molecular weight was 1483250, while the degree of polymerization was 9155.9. The amount of glucose released from water-soluble glucan was lower obviously than that from waxy corn starch（WCS）.

关 键 词：水溶性葡聚糖 甜玉米 粒径 消化性 

分 类 号：TS213.4[轻工技术与工程—粮食、油脂及植物蛋白工程]