食品科学 ›› 2009, Vol. 30 ›› Issue (12): 123-126.doi: 10.7506/spkx1002-6630-200912023

• 工艺技术 • 上一篇    下一篇

超滤法分离黑豆抗氧化活性肽

任海伟1,王常青2,*   

  1. 1.兰州理工大学生命科学与工程学院 2.山西大学生命科学与技术学院
  • 收稿日期:2008-09-08 修回日期:2009-02-04 出版日期:2009-06-15 发布日期:2010-12-29
  • 通讯作者: 王常青2,* E-mail:wcq@sxu.edu.cn
  • 基金资助:

    太原市大学生创新计划项目(07010737)

Ultrafiltration Preparation of Antioxidant Peptides from Black Soybean

REN Hai-wei1,WANG Chang-qing2,*   

  1. (1. College of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    2. School of Life Science and Technology, Shanxi University, Taiyuan 030006, China)
  • Received:2008-09-08 Revised:2009-02-04 Online:2009-06-15 Published:2010-12-29
  • Contact: WANG Chang-qing2,* E-mail:wcq@sxu.edu.cn

摘要:

采用不同截留分子量(MWCO)的超滤膜分离制备黑豆抗氧化活性肽,研究超滤系统主要参数对膜通量的影响,确定超滤条件和膜清洗方法,并测定各级多肽清除羟自由基的能力。结果表明:采用改性PES 平板超滤膜、室温、黑豆多肽液浓度2%,pH6.5 和压力0.25MPa 的条件下分离黑豆抗氧化活性肽效果较好;依次用蛋白酶液、含SDS 的碱液和NaClO 溶液清洗超滤膜后,膜通量恢复率达95.68%;分子量小于2ku 的小分子黑豆多肽具有很强的清除·OH 能力,抗氧化活性最强。

关键词: 超滤, 抗氧化活性肽, 膜清洗, 羟自由基

Abstract:

The neutral protease-catalyzed hydrolysis products of black soybean protein isolate (BSPI) were fractionated using ultrafiltration membrane with the molecular weight cut-off (MWCO) of 10, 6 and 2 ku. Effects of 4 ultrafiltration parameters, including membrane module type, operating pressure, and pH value and concentration of BSPI peptide solution on membrane separation efficiency, as well as cleaning effects of different reagents on membrane (represented by water flux recovery, WFR), were investigated. Furthermore, hydroxyl radical scavenging activities of BSPI peptides with different MWs were assayed. The results showed that a satisfying ultrafiltration effect was achieved using modified PES flat sheet ultrafiltration membrane module under the conditions of 0.25 MPa, pH 6.5, 2% peptide concentration, and 25 ℃, and the sequential cleaning procedure with proteinase liquid and alkali solution containing SDS and NaClO led to a WFR of 95.68%. Radical scavenging assay indicated that the peptides with MWCO less than 2 ku possessed higher antioxidant capacity and the IC50 was 0.587 mg/ml.

Key words: black soybean, ultrafiltration, antioxidant peptides, membrane cleaning, hydroxyl radical

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