阿拉伯木聚糖微球：结构和质地特性。

Arabinoxylan microspheres: structural and textural characteristics.

机构信息

Laboratory of Biopolymers, CTAOA,Research Center for Food and Development, CIAD, A.C. Carretera a La Victoria Km. 0.6, Hermosillo, Sonora, 83000 Mexico.

出版信息

Molecules. 2013 Apr 19;18(4):4640-50. doi: 10.3390/molecules18044640.

DOI:10.3390/molecules18044640

PMID:23603947

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6270067/

Abstract

The aim of this research was to study the structural and textural characteristics of maize bran arabinoxylan (MBAX) microspheres. The laccase-induced cross-linking process was monitored by storage (G') and loss (G'') moduli changes in a 4% (w/v) MBAX solution. The G' and G'' values at the plateau region were 215 and 4 Pa, respectively. After gelation, the content of ferulic acid dimers decreased from 0.135 to 0.03 µg/mg MBAX, suggesting the formation of ferulated structures unreleased by mild alkaline hydrolysis. MBAX microspheres presented an average diameter of 531 µm and a swelling ratio value (q) of 18 g water/g MBAX. The structural parameters of MBAX microspheres were calculated from equilibrium swelling experiments, presenting an average mesh size of 52 nm. Microstructure and textural properties of dried MBAX microspheres were studied by scanning electron microscopy and nitrogen adsorption/desorption isotherms, respectively, showing a heterogeneous mesoporous and macroporous structure throughout the network.

摘要

本研究旨在研究玉米麸阿拉伯木聚糖（MBAX）微球的结构和质地特性。通过监测 4%（w/v）MBAX 溶液中储存（G'）和损耗（G''）模量的变化，研究了漆酶诱导的交联过程。平台区的 G'和 G''值分别为 215 和 4 Pa。凝胶化后，阿魏酸二聚体的含量从 0.135µg/mg MBAX 降至 0.03µg/mg MBAX，表明形成了不易被温和碱性水解释放的阿魏酸结构。MBAX 微球的平均直径为 531µm，溶胀比（q）值为 18g 水/g MBAX。从平衡溶胀实验中计算出 MBAX 微球的结构参数，呈现出平均孔径为 52nm 的均一网状结构。通过扫描电子显微镜和氮气吸附/解吸等温线分别研究了干燥 MBAX 微球的微观结构和质地特性，结果表明整个网络具有不均匀的中孔和大孔结构。