食品科学

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厚朴多糖提取工艺及其体外抗氧化活性

姜 宁1,刘晓鹏1,2,*,陈 芳1,喻长发1,勒栋梁3,丁振国3,吴 皓2   

  1. 1.湖北民族学院生物科学与技术学院,湖北 恩施 445000;2.南京中医药大学博士后流动站,江苏 南京 210023;
    3.南京同仁堂洪泽中药材科技有限公司,江苏 洪泽 223200
  • 出版日期:2015-03-25 发布日期:2015-03-17
  • 通讯作者: 刘晓鹏
  • 基金资助:

    国家自然科学基金地区科学基金项目(81460573);“十二五”国家科技支撑计划项目(2011BAI04B04);
    江苏省“企业博士后集聚计划”项目(2011033);2013年湖北省战略性新兴(支柱)产业人才培养(生物工程)项目

Extraction and Antioxidant Activities of Polysaccharides from Magnolia officinalis Rehd. et Wils. Barks

JIANG Ning1, LIU Xiaopeng1,2,*, CHEN Fang1, YU Changfa1, LE Dongliang3, DING Zhenguo3, WU Hao2   

  1. 1. School of Biological Science and Technology, Hubei Institute for Nationalities, Enshi 445000, China;
    2. Postdoctoral Research Station, Nanjing University of Chinese Medicine, Nanjing 210023, China;
    3. Nanjing Tongrentang Hongze Chinese Herbal Science and Technology Co. Ltd., Hongze 223200, China
  • Online:2015-03-25 Published:2015-03-17
  • Contact: LIU Xiaopeng

摘要:

通过Box-Behnken试验优化提取厚朴多糖的工艺;以超氧阴离子自由基、1,1-二苯基-二苦基肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)自由基和2,2’-连氮基-双-(3-乙基苯并噻唑-6-磺酸)(ABTS+•)清除能力,Fe2+螯合力、铁离子还原抗氧化力(ferric reducing antioxidant power,FRAP)为指标,探究厚朴多糖的体外抗氧化活性。结果表明,提取厚朴多糖的最佳工艺条件为pH 7.3、液固比32∶1(mL/g)、提取温度78 ℃、提取时间139 min,此条件下多糖提取率达3.35%~3.52%。体外抗氧化活性结果表明,厚朴多糖超氧阴离子自由基清除力为(18.72±2.12) μmol VC/mg,DPPH自由基清除能力达(0.59±0.05) μmol Trolox/mg,ABTS+•清除能力为(0.57±0.04) μmol Trolox/mg,Fe2+螯合力为(0.38±0.02) μmol EDTA/mg,FRAP值为(2.19±0.31) μmol Trolox/mg。

关键词: 厚朴, 多糖, 提取, 响应面分析, 抗氧化

Abstract:

In this study, we investigated the optimization of polysaccharides extraction from the dried barks of Magnolia
officinalis Rehd. et Wils. by response surface methodology (RSM) based on Box-Behnken design and measured the
antioxidant activities of the extracted polysaccharides by superoxide anion radical scavenging, 1,1-diphenyl-2-picrylhydrazyl
(DPPH·) scavenging, 2,2’-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid (ABTS+·) radical scavenging, Fe2+ chelating
activity, as well as Ferric reducing antioxidant power (FRAP) assays. The results indicated that the optimal extraction
conditions for polysaccharides from Magnolia officinalis Rehd. et Wils. were obtained as follows: pH, 7.3; liquid-to-solid
ratio, 32:1 (mL/g); temperature, 78 ℃; and extraction time, 139 min. Under these conditions, the yield of polysaccharides
was 3.35%-3.52%. The extracted polysaccharides exhibited powerful antioxidant activities. The radical scavenging activities
against superoxide anion, DPPH and ABTS+· radicals, Fe2+ chelating activity and FRAP value were (18.72 ± 2.12) μmol
ascorbic acid equivalent (AAE)/mg, (0.59 ± 0.05) μmol Trolox equivalent (TE)/mg, (0.57 ± 0.04) μmol TE/mg, (0.38 ±
0.02) μmol EDTA-2Na equivalent (EE)/mg, and (2.19 ± 0.31) μmol TE/mg, respectively.

Key words: Magnolia officinalis Rehd. et Wils., polysaccharides, extraction, response surface methodology, antioxidant activity

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