食品工业科技2024，Vol.45Issue(3)：18-30,13.DOI:10.13386/j.issn1002-0306.2023060290
硒化天麻多糖的制备、结构表征及其抗氧化活性评价
Preparation,Structure Characterization and Antioxidant Activity Evaluation of Selenized Gastrodia elata Polysaccharides
摘要
Abstract
In this paper,the preparation of Selenized Gastrodia elata polysaccharides(SeGEP)was conducted through HNO3-Na2SeO3 method using GEP and sodium nitrite as the raw materials,and the modification conditions were optimized by single factor experiment combined with response surface method using selenium content as the index.Ultraviolet spectrum(UV),infrared spectrum(IR),nuclear magnetic resonance(NMR),particle size test,zeta potential test,Congo red test,iodine-potassium iodide test,and scanning electron microscope(SEM)techniques were carried out to explore the structure of GEP and SeGEP.Antioxidant tests were conducted to evaluate the effect of selenylation modification on GEP in vitro.The results showed that the optimum selenylation parameters were as follows:Reaction temperature 74℃,nitric acid concentration 0.041%,reaction time 8.4 h,and under the optimum conditions,the selenium content could be reached to 3891.05±10.86 μg/g.Structural characterization analysis showed that SeGEP had been successfully accomplished,and SeGEP had reduced the particle size,increased the absolute value of Zeta potential and improved the stability in solution by comparing with GEP.It was also found that both GEP and SeGEP might possess triple helix with long side branched chain structures,whereas selenylation modification could change the micromorphology of GEP.The in vitro antioxidant results showed that the DPPH radical scavenging rate of SeGEP at 10 mg/mL was 98%±1.52%and the maximum iron reducing power was 0.99±0.24,and the ABTS+ radical scavenging rate of SeGEP at 1 mg/mL was 97.49%±1.16%,respectively.SeGEP exhibited higher antioxidant activities than that of GEP,indicating that selenylation modification could improve the antioxidant ability of GEP.This study provided a theoretical basis for the development of selenium supplement and functional food related to selenized Gastrodia elata polysaccharides.关键词
天麻多糖/硒化修饰/工艺优化/结构表征/抗氧化活性Key words
Gastrodia elata polysaccharides/selenylation modification/process optimization/structure characterization/antioxidation activity分类
轻工纺织引用本文复制引用
温启华,陆逸昊,杨露芳,陈江旭,程永友,刘莹,许粟,马风伟..硒化天麻多糖的制备、结构表征及其抗氧化活性评价[J].食品工业科技,2024,45(3):18-30,13.基金项目
贵州省科技厅科技计划项目(黔科合平台人才-CXTD[2022]002) （黔科合平台人才-CXTD[2022]002）
贵州省科技厅基础研究计划项目(黔科合基础[2019]1013号) （黔科合基础[2019]1013号）
贵州省教育厅(黔教技[2023]042) （黔教技[2023]042）
贵阳市科技局贵阳学院专项资金(GYU-KYZ[2018]01-16) （GYU-KYZ[2018]01-16）
贵阳学院博士科研启动经费项目(GYU-ZRD[2018]-022]) （GYU-ZRD[2018]-022]）
2021年贵阳学院硕士研究生科研基金项目(GYU-YJS[2021]-51). （GYU-YJS[2021]-51）
