食品与机械2017，Vol.33Issue(12)：143-147,5.DOI:10.13652/j.issn.1003-5788.2017.12.029
柚皮膳食纤维微波辅助碱法提取工艺优化及其功能特性研究
Functional properties and optimization of microwave assisted alkaline extraction of dietary fiber from pomelo peel
摘要
Abstract
The extraction technology of dietary fiber from Jiangyong pomelo peel by microwave assisted alkali method was established and the physicochemical properties and antioxidant activity of dietary fiber were analyzed.The results showed that,ensuring the extraction rate of soluble dietary fiber preferentially,the optimum extraction process of dietary fiber were solid-liquid ratio of 1︰10 (g/mL), NaOH concentration of 8%,microwave time 40 s and microwave power 350 W.With the contrl of the optimal conditions,the maxi-mum extraction yield rate of soluble dietary fiber (SDF)and insoluble dietary fiber (IDF)was 40.8% and 45.1%,respectively. Moreove,the dietary fiber showed fine water holding capacity(SDF:5.3 g/g;IDF:3.5 g/g),swelling capacity (SDF:5.1 mL/g;IDF:2.4 mL/g)and oil holding capacity (SDF:4.6 g/g;IDF:2.1 g/g). In addition,the a good antioxidant activity was also found in the diet-ary fiber,which could scavenge DPPH radicals and inhibit the oxida-tion of vegetable oil.The free radical scavenging rate of SDF was sig-nificantly higher than that of IDF and BHT (t-test,P<0.05)when these concentration reached 2 mg/mL.Finally,the inhibitory effect on POV of vegetable oil under the same mass fraction was SDF>IDF>BHT.关键词
江永香柚/膳食纤维/微波/碱法/理化性质/抗氧化Key words
Jiangyong pomelo/dietary fiber/microwave/alkali meth-od/physicochemical properties/antioxidant activity引用本文复制引用
闫荣玲,廖阳,毛龙毅,何福林..柚皮膳食纤维微波辅助碱法提取工艺优化及其功能特性研究[J].食品与机械,2017,33(12):143-147,5.基金项目
湘南优势植物资源综合利用湖南省重点实验室研究项目(编号:XNZW15C10,XNZW15C18) （编号:XNZW15C10,XNZW15C18）
湖南省教育厅科研项目(编号:17C0677) （编号:17C0677）
湖南科技学院校级重点项目(编号:17XKY007,17XKY010) （编号:17XKY007,17XKY010）
湖南省大学生研究性学习与创新性实验项目(编号:[2016]283号第637项) （编号:[2016]283号第637项）
