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投稿时间:2022-05-13
投稿时间:2022-05-13
中文摘要: 以洋蓟加工副产物为原料,通过超微粉碎-微波复合改性获得可溶性膳食纤维(soluble dietary fiber,SDF),并以SDF 得率为评判指标,采用单因素试验对柠檬酸质量分数、液料比、微波功率和微波时间4 个因素进行研究,在该基础上开展响应面优化试验。结果表明:提取洋蓟SDF 的最佳工艺参数为柠檬酸质量分数1%、液料比25∶1(mL/g)、微波时间30 s 和微波功率500 W,该条件下洋蓟SDF 得率为19.37%。与普通粉碎进行比较,改性后SDF 含量增加199%(P<0.05),微观结构颗粒尺寸减小、疏松多孔、比表面积增加,为后续开发洋蓟的附加价值提供参考。
Abstract:Soluble dietary fiber(SDF)was obtained by processing artichoke by-products using superfine comminution and microwave modification.Four factors,namely citric acid mass fraction,liquid-to-material ratio,microwave power,and microwave time,were investigated by single-factor experiments.The results showed that the optimal process parameters for the extraction of artichoke SDF were:citric acid mass fraction(1%),liquidto-material ratio(25∶1),microwave time(30 s),and microwave power(500 W).The yield of artichoke SDF under these conditions was 19.37%.Compared with common grinding,SDF content increased by 199% after modification(P<0.05).Additionally,it was observed that the microstructure particle size decreased,loosened,and became porous,and the specific surface area increased thereby providing a reference for the development of superior artichoke SDF.
keywords: artichoke dietary fiber superfine comminution microwave-assisted extraction compound modification microstructure
文章编号:202316019 中图分类号: 文献标志码:
基金项目:湖南省自然科学基金项目(2019JJ60020);湖南省科技创新平台与人才计划项目(2017TP1021);长沙市科技计划项目(kc1704007);湖南省教育厅“十二五”重点学科资助项目(2011-76)
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