Institute of Light Industry and Food Engineering, Guangxi University, 530004 Nanning, China; College of Food Engineering, Guangxi College and University Key Laboratory of High-value Utilization of Seafood and Prepared Food in Beibu Gulf, Beibu Gulf University, 535011 Qinzhou, China.
College of Food Engineering, Guangxi College and University Key Laboratory of High-value Utilization of Seafood and Prepared Food in Beibu Gulf, Beibu Gulf University, 535011 Qinzhou, China.
Int J Biol Macromol. 2024 Nov;280(Pt 4):136098. doi: 10.1016/j.ijbiomac.2024.136098. Epub 2024 Sep 28.
In order to improve the processing and digestibility of the Arenga pinnata (Wurmb.) Merr. starch (APS), low concentration citric acid (CA) and chitosan (CS) were used for dual modification. The purpose of this study was to prepare APS and CS complexes with CA, the complexes (CA-CS-APS) physicochemical properties were investigated. The short-range ordered structure (DO), double helix structure (DO) and relative crystallinity (RC) were decreased; CA-CS resulted in the surface roughness of APS, but the particle integrity was preserved; the particle size of CA-CS-APS was increased. Compared with APS, the peak viscosity of CA-CS-APS was decreased from 2534 cP to 27 cP; CA-CS reduced the swelling power of APS, CA3%-CS-APS decreased from 19.00 g/g to 8.17 g/g. The gelatinization enthalpy was decreased after CA-CS modification from 3.25 J/g to 0.55 J/g. CA-CS-APS exhibits higher storage modulus and loss modulus (2067 Pa and 80 Pa). CA-CS significantly improved the anti-digestibility of APS, and the resistant starch (RS) content was increased from 32 % to 39 %. This study provided a simple and effective way to prepare modified starch, which had the potential as food additives or used as a base material for film preparation.
为了提高鱼尾葵（Wurmb.）淀粉（APS）的加工性和消化率，采用低浓度柠檬酸（CA）和壳聚糖（CS）对其进行双重改性。本研究旨在制备具有 CA 的 APS 和 CS 复合物，研究了复合物（CA-CS-APS）的物理化学性质。短程有序结构（DO）、双螺旋结构（DO）和相对结晶度（RC）降低；CA-CS 导致 APS 表面粗糙度增加，但保留了颗粒完整性；CA-CS-APS 的粒径增加。与 APS 相比，CA-CS-APS 的峰值黏度从 2534 cP 降低到 27 cP；CA-CS 降低了 APS 的溶胀能力，CA3%-CS-APS 从 19.00 g/g 降低到 8.17 g/g。CA-CS 改性后，糊化焓从 3.25 J/g 降低到 0.55 J/g。CA-CS-APS 表现出更高的储能模量和损耗模量（2067 Pa 和 80 Pa）。CA-CS 显著提高了 APS 的抗消化性，抗性淀粉（RS）含量从 32%增加到 39%。本研究为制备改性淀粉提供了一种简单有效的方法，有望作为食品添加剂或用作薄膜制备的基础材料。
