抗性淀粉
化学
延伸率
淀粉
直链淀粉
肿胀 的
酶
溶解度
食品科学
生物化学
化学工程
有机化学
材料科学
极限抗拉强度
工程类
冶金
作者
Dong Hyun Jung,Cheon Seok Park,Hyun‐Seok Kim,Tae Gyu Nam,Byung Hoo Lee,Moo-Yeol Baik,Sangjun Yoo,Dong Ho Seo
标识
DOI:10.1016/j.foodhyd.2021.107086
摘要
Branch-chain elongated starches can be synthesized by amylosucrase (AS). In this study, potato starches with different branch-chain length were produced using the temperature-dependent elongation property of AS from Deinococcus geothermalis (DGAS). Decreasing the reaction temperature led to a significant rise in the length of the branch-chains, in addition to amylose content. As branch-chain length increased, B-type crystal structure increased significantly alongside it, and the thermal transitions were enhanced, suggesting that the crystalline structure was further stabilized. In addition, a decrease in solubility and swelling power was observed, whereas the gelatinization temperatures and peak viscosities increased accordingly. With respect to digestive properties, a remarkable rise in slowly digestible starch (0–19.8%) and resistant starch (38.2%–62.2%) contents was observed, along with an enhanced resistance to mammalian mucosal α-glucosidase. In conclusion, enzymatic modification by DGAS might be an innovative method to regulate the physicochemical and digestive properties of starches.
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