食品科学 ›› 2019, Vol. 40 ›› Issue (18): 281-286.doi: 10.7506/spkx1002-6630-20181017-177

• 成分分析 • 上一篇    下一篇

长白山区核桃青皮多糖分离纯化、鉴定及抗氧化活性分析

谢东雪,陆娟,王月,王超雪,陈瑞战,高佳欣   

  1. (长春师范大学化学学院,吉林?长春 130032)
  • 出版日期:2019-09-25 发布日期:2019-09-23
  • 基金资助:
    长春师范大学研究生教育创新基金项目(cscxy2018035)

Purification, Preliminary Characterization and Antioxidant Activity of Polysaccharides from Green Husks of Walnut (Juglans regia L.) Grown in Changbai Mountain

XIE Dongxue, LU Juan, WANG Yue, WANG Chaoxue, CHEN Ruizhan, GAO Jiaxin   

  1. (College of Chemistry, Changchun Normal University, Changchun 130032, China)
  • Online:2019-09-25 Published:2019-09-23

摘要: 对核桃青皮多糖(polysaccharide of walnut green husks,JPs)进行分离纯化,并对得到的多糖进行单糖组成及体外抗氧化活性分析。利用超声波辅助提取JPs,经醇沉、除蛋白、透析等一系列处理后,先后利用DEAE-Sepharose和Sephadex?G-100柱色谱分离纯化JPs得到了两种均一多糖(JPs-1-1和JPs-2-1);利用高效凝胶渗透色谱法测定两种均一多糖的分子质量分别为5.45×104、5.22×104?u;利用PMP-柱前衍生高效液相色谱法测定了两种均一多糖的单糖组成,均是由鼠李糖(Rha)、葡萄糖醛酸(GlcA)、半乳糖(Gal)、葡萄糖(Glc)、半乳糖醛酸(GalA)、木糖(Xyl)及阿拉伯糖(Ara)以不同的物质的量比组成。总抗氧化能力实验、1,1-二苯基-2-苦味基肼自由基和羟自由基清除实验结果表明JPs及分离纯化得到的两种均一多糖均具有较好的抗氧化活性,而且抗氧化活性的能力与样品的质量浓度呈正相关。

关键词: 核桃青皮, 多糖, 纯化, 抗氧化活性

Abstract: In this study, polysaccharides named as JPs were ultrasonically extracted from walnut green husks. After sequential treatments of ethanol precipitation, deproteinization and dialysis, JPs were fractionated by DEAE-Sepharose and Sephadex G-100 column chromatography into two homogenous fractions (JPs-1-1 and JPs-2-1). The molecular masses of JPs-1-1 and JPs-2-1 were measured to be 5.45 × 104 and 5.22 × 104 u by high performance gel filtration chromatography, respectively. Monosaccharide analysis by precolumn derivatization with 1-phenyl-3-methyl-5-pyrazolone (PMP) coupled to high performance liquid chromatography (HPLC) indicated that both polysaccharides were composed of rhamnose, glucuronic acid, galactose, glucose, galacturonic acid, xylose and arabinose, but in different molecular ratios. JPs and its fractions possessed a good antioxidant activity in terms of ferric-reducing antioxidant power and scavenging activities against hydroxyl and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals in a dose-dependent manner within a certain concentration range.

Key words: green walnut husks, polysaccharides, purification, antioxidant activity

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