食品科学 ›› 2011, Vol. 32 ›› Issue (21): 165-170.doi: 10.7506/spkx1002-6630-201121034

• 生物工程 • 上一篇    下一篇

小黄鱼抗氧化肽制备条件的响应面优化

徐 鑫,何佳易,刘国艳*,蔡丽丽,魏晓蕊,徐 娜   

  1. 扬州大学食品科学与工程学院
  • 出版日期:2011-11-15 发布日期:2011-11-11
  • 基金资助:
    江苏省科技型中小企业技术创新资金项目(BN2008207)

Process Conditions Optimization for Antioxidant Peptide Preparation from Small Yellow Croaker by Response Surface Methodology

XU Xin,HE Jia-yi,LIU Guo-yan*,CAI Li-li,WEI Xiao-rui,XU Na   

  1. (College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China)
  • Online:2011-11-15 Published:2011-11-11

摘要: 目的:优化胰蛋白酶(PTN 6.0S)酶解小黄鱼制备抗氧化肽的条件。方法:以酶解产物对1,1-二苯基苦基苯肼 (DPPH)自由基的清除率为指标,通过单因素试验及响应曲面法优化酶解条件。结果:酶解条件在pH7.0、温度52℃、时间19h、底物质量浓度4.2g/100mL,酶与底物比6‰时,产物对DPPH自由基的清除率达到最大值(46.90±0.3)%。响应面分析表明,酶解时间对产物的抗氧化活性有显著影响;温度与酶与底物比、时间与底物质量浓度、酶与底物比与底物质量浓度在酶解工艺中存在复杂的交互作用。

关键词: 小黄鱼, 抗氧化肽, 响应曲面法, DPPH

Abstract: Objective: To optimize trypsin (PTN 6.0S) hydrolysis conditions of small yellow croaker for preparing antioxidant peptides. Methods: The optimization was performed using one-factor-at-a-time method and response surface methodology based on DPPH radical scavenging activity. Results: The optimal hydrolysis conditions were substrate concentration of 4.2 g/100 mL, enzyme-to-substrate ratio of 6‰, hydrolysis time of 19 h and hydrolysis temperature of 52 ℃. Maximum DPPH scavenging rate was obtained under the system of pH 7.0, reaching (46.90 ± 0.3)%. Response surface analysis showed that hydrolysis time had a significant effect on antioxidant activity of products and that the interactions between hydrolysis temperature and enzyme-to-substrate ratio, between hydrolysis time and substrate concentration, and between enzyme-to-substrate ratio and substrate concentration were complicated.

Key words: small yellow croaker, antioxidant peptides, response surface methodology, DPPH radical

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