Effects of corn fiber gum with different molecular weights on the gelatinization behaviors of corn and wheat starch
Effects of corn fiber gum with different molecular weights on the gelatinization behaviors of corn and wheat starch
复制标题
不同分子量玉米纤维胶对玉米、小麦淀粉糊化行为的影响
DOI：
10.1016/j.foodhyd.2015.01.034
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发表时间：
2016-02-01
影响因子：
10.7
通讯作者：
Yin, Lijun
中科院分区：
文献类型：
--
作者：
Qiu, Shuang;Yadav, Madhav P.;Yin, Lijun
玉米纤维胶（CFG）是一种新型的阿拉伯木聚糖水胶体，近年来的研究表明它在食品加工中具有很大的应用潜力。在这项研究中，评估了由淀粉和具有不同分子特征的CFG组成的复合体系。研究了玉米淀粉和小麦淀粉的糊化特性、热特性、微观结构和直链淀粉的溶出特性。与单独的淀粉悬浮液相比，CFG的加入导致玉米淀粉的峰值粘度、崩解值和最终粘度的降低。降低了小麦淀粉的峰值粘度和最终粘度，但增加了淀粉的崩解值。快速粘度分析仪（RVA）特性的变化随CFG分子量的增大而减小。玉米/小麦淀粉凝胶中直链淀粉的溶出量随CFG分子量的增加而减少。差示扫描量热法（DSC）测定的玉米淀粉/CFG混合物的热特性变化不大。共聚焦激光扫描显微镜（CLSM）证实了淀粉组分的凝胶微观结构的变化往往被抑制从颗粒中浸出。CFG的加入还导致小麦淀粉颗粒在糊化后的形态结构清晰，表明CFG对颗粒结构具有抑制作用。(C)2015爱思唯尔有限公司版权所有。
Corn fiber gum (CFG) is a novel arabinoxylan hydrocolloid and recent research indicates that it has a considerable potential in food processing. In this study, composite systems consisting of starch and CFG with different molecular characteristics have been evaluated. The pasting and thermal properties, microstructure and leached amylose of corn and wheat starch have been studied. When compared with the starch suspensions alone, CFG addition led to lowering of peak viscosity, breakdown and final viscosity of corn starch. It also led to lowering of peak viscosity and final viscosity, but increase of breakdown of wheat starch The changes in rapid viscosity analyzer (RVA) characteristics were less pronounced as the M-w of CFG was increased. The amount of leached amylose of corn/wheat starch gels decreased as the M-w of CFG increased. The thermal characteristics of corn starch/CFG mixtures varied insignificantly as determined in differential scanning calorimetry (DSC) heating process. Confocal laser scanning microscopy (CLSM) confirmed changes in gel microstructure as starch components tended to be inhibited from leaching out of the granules. CFG addition also led to a well-defined morphology of wheat starch granules after gelatinization, suggesting a leaching-inhibition effect of CFG on the granule structure. (C) 2015 Elsevier Ltd. All rights reserved.