食品工业科技2024，Vol.45Issue(15)：85-90,6.DOI:10.13386/j.issn1002-0306.2023080197
挤压物料水分对白酒糟醇溶蛋白性质的影响
Extrusion Material Moisture on the Property of Prolamins from Distiller's Grains
摘要
Abstract
In this study,a single-screw extruder was used to extrude distiller's grains(DGs)and the effect of extrusion material moisture(21％,24％,27％,30％,33％)on prolamins from DGs(PDGs)was studied by measuring the physicochemical(solubility,hydrophobicity,sulfhydryl and the disulfide bonds contents),functional(water and oil holding capacities)and secondary and tertiary structure properties.The results showed that the modification effect of PDGs was significantly affected by different extrusion material moisture.The damage degree of the natural structure of PDGs was increased gradually with the increase of extrusion material moisture,and the change of molecular conformation promoted the exposure of internal hydrophilic groups and the formation of disulphide bonds.The solubility was increased by 1.56 times to 34.75％,the surface hydrophobicity was reduced by 56.11％at 27％extrusion materials moisture,and the water holding capacity was enhanced accordingly.The thermal denaturation temperature was increased from 96.79 ℃ to 102.53 ℃,indicating the thermal stability was stronger.The order of protein aggregates increased after the denaturation rearrangement of extruded PDGs.Extrusion led to excessive degeneration of PDGs when the material moisture was too high(higher than 27％),and the destruction of the stable aggregation state would weaken the hydrophilicity,thermal property and order degree of PDGs,indicating that the extrusion material moisture played a very important role in regulating the variation of PDGs properties.关键词
白酒糟醇溶蛋白/挤压/物料水分/理化性质/结构表征Key words
prolamins from distiller's grains/extrusion/material moisture/physicochemical property/structural characterization分类
轻工纺织引用本文复制引用
刘瑶,袁若云,李宏军,陈善峰,马成业,汪陈洁..挤压物料水分对白酒糟醇溶蛋白性质的影响[J].食品工业科技,2024,45(15):85-90,6.基金项目
国家自然科学基金(32201946) （32201946）
山东省自然科学基金(ZR2021QC072) （ZR2021QC072）
山东省博士后创新项目(20213048). （20213048）
