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投稿时间:2018-11-22
投稿时间:2018-11-22
中文摘要: 以薏米为原料,利用超声辅助水提醇沉法提取薏米多糖,通过正交试验设计优化薏米多糖的提取工艺条件,并对薏米多糖的抗氧化性进行研究。结果表明,薏米多糖提取的最佳工艺条件为:提取时间为2 h,提取温度为75 ℃,pH 值为5,料液比为1∶20(g/mL),此时薏米多糖得率为1.56%。在相同的质量浓度下,所提取的薏米多糖对羟自由基具有一定的清除能力,但效果弱于抗坏血酸。
Abstract:The polysaccharide was extracted from coix seed by water extraction and ethanol precipitation method assisted with ultrasound.The extraction conditions of polysaccharide were optimized by an orthogonal experimental design,and the antioxidant effects of the extracted polysaccharide was also studied.The results showed that the optimum extraction technology was extraction time 2 h,extraction temperature 75 ℃,pH value 5,and solid-liquid ratio 1∶20(g/mL).Under the condition,the extraction rate of polysaccharide reached 1.56%.The experiment indicated that extracted polysaccharide had a certain scavenging ability to hydroxy radicals,but the effect was weaker than ascorbic acid under the same quality concentrations.
文章编号:201918001 中图分类号: 文献标志码:
基金项目:国家自然科学基金项目(31501342);延安大学博士科研启动项目(YDBK2017-35)
Author Name | Affiliation |
YAN Xu-yu,LI Ling | College of Life Science,Yanan University,Yanan 716000,Shaanxi,China |
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