高压蒸汽处理玉米淀粉的回生：水分含量对抗性淀粉形成和结构的影响。
Retrogradation of autoclaved corn starches: Effect of water content on the resistant starch formation and structure.
机构信息
Instituto Politécnico Nacional, CICATA-IPN Querétaro, Cerro Blanco No. 141. Col, Colinas Del Cimatario, C.P. 76090, Santiago de Querétaro, Querétaro, Mexico.
División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Cerro de Las Campanas S/n, C.P. 76010, Santiago de Querétaro, Querétaro, Mexico.
出版信息
Carbohydr Res. 2020 Nov;497:108137. doi: 10.1016/j.carres.2020.108137. Epub 2020 Aug 22.
In this study, the resistant starch (RS) formation, crystallinity, and double helical order of autoclaved (120 °C) normal (ANS) and high amylose (AHS) corn starches retrograded at 4-26% of water content were investigated. ANS and AHS retrograded at ~25-26% of water content were more crystalline (35-40%) and formed by more close-packed double helices (R cm = 1.145-1.290). The highest content of RS (38.8%) was found in AHS retrograded at 25.52% of water content meanwhile in ANS, the maximum content of RS was 6.6% at 21.60% of water content despite its structural order was increased with the increase of water content. The recrystallization of amylopectin interfered with the formation of homogeneous crystalline structures of amylose preventing the formation of retrograded RS in ANS, while in AHS, a relationship between structure and RS formation was observed, suggesting that the close-packed double helices and the proportion of homogeneous amylose crystallites increased the resistance to enzymatic digestion.
本研究考察了在 4-26%含水量下回生的高压蒸汽处理（120°C）普通（ANS）和高直链淀粉（AHS）玉米淀粉的抗性淀粉（RS）形成、结晶度和双螺旋有序性。在 25-26%含水量下回生的 ANS 和 AHS 具有更高的结晶度（~35-40%）和更紧密堆积的双螺旋（Rcm = 1.145-1.290）。在 AHS 中，在 25.52%含水量下回生时发现 RS 的含量最高（38.8%），而在 ANS 中，尽管随着含水量的增加其结构有序性增加，但 RS 的最大含量为 6.6%，在 21.60%含水量下。支链淀粉的再结晶干扰了直链淀粉同质结晶结构的形成，从而阻止了 ANS 中回生 RS 的形成，而在 AHS 中，观察到结构与 RS 形成之间存在关系，表明紧密堆积的双螺旋和同质直链淀粉晶块的比例增加了对酶消化的抵抗力。
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