食品与机械2017，Vol.33Issue(3)：27-30,36,5.DOI:10.13652/j.issn.1003-5788.2017.03.006
玉米淀粉在DMSO/水体系中溶解性与精细结构变化
Solubility and structural changes of corn starch in DMSO / water system
摘要
Abstract
Dimethyl sulfoxide (DMSO) is the key reagent to dissolve starch in the starch structural analysis.In this paper,solubility and structural changes of corn starch in DMSO/water system were studied.Corn starch achieved maximum solubility of 97.15％ in 90％ DMSO solution when the dissolution time reaches 12 h.With the excessive dissolution,no significant change in solubility was detected.Scanning electron microscopy (SEM) analysis showed that starch granules structure were the largest damaged in 90％ DMSO,which confirmed that 90％ DMSO was the best solvent for starch.High performance size exclusion chromatography (HPSEC) and high performance anion-exchange chromatography (HPAEC) found that the molecular weight and radius of gyration of starch dissolved in 90％ DMSO gradually decreased with the extension of the dissolution time,which indicated that starch molecules were degraded.Furthermore,theB2 and B3 chains of amylopectin were more easily to degrade,and the B1 chains were relatively stable.关键词
二甲亚砜/分子量/侧链分布Key words
dimethyl sulfoxide/molecular weight/chain-length distribution引用本文复制引用
王瑞,田耀旗,谢正军..玉米淀粉在DMSO/水体系中溶解性与精细结构变化[J].食品与机械,2017,33(3):27-30,36,5.基金项目
江苏省产学研前瞻性联创项目(编号:BY2016022-06) （编号:BY2016022-06）
江苏省优秀青年基金项目(编号:BK20160052) （编号:BK20160052）
