摘要
对4种不同直链/支链淀粉含量玉米淀粉的结晶结构和形态学进行研究,并采用Englyst法对4种淀粉进行体外消化模拟试验,探索了淀粉结构与消化性质的关系。高支(蜡质和普通)和高链(HylonⅤ和HylonⅦ)玉米淀粉分别属于A型和B型结晶结构,其消化机理对应为"由内向外(inside-out)"和"由外向内(exo-pitting)"消化类型。高支玉米的慢消化淀粉(SDS)含量较高,而高链玉米淀粉的抗性淀粉(RS)含量远高于高支淀粉。
Crystalline structures and morphology of four different cornstarches with different amylose/amylopectin content were investigated. The vitro digestibility of four cornstarches was tested according to Englyst method. The relationship between starch structure and digestion mechanism was discussed. High-amylopeetin (waxy and normal) and high-amylose (Hylon Ⅴ and Hylon Ⅶ cornstarches belong to A-and B-type structures, respectively. A-type starches are "inside-out" digestion mechanism, while the B-type starches produce a different hydrolysis pattern observed as " exo-pitting". The level of slow digestion in high amylopectin cornstarch was higher than high-amylose cornstarch, while the Resistant Starch (RS) content of high-amylose cornstarches is much higher than high amylopection conrstarch.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2010年第8期26-30,共5页
Food and Fermentation Industries
基金
广东省高校优秀青年创新人才培养计划项目资助(x2qsN9100250)
华南理工大学中央高校基本科研业务费资助项目(2009ZM0058)
关键词
玉米淀粉
直链淀粉
体外消化
结晶结构
cornstarch, amylose, in vitro digestibility, crystalline structure