食品科学 ›› 2011, Vol. 32 ›› Issue (18): 142-147.doi: 10.7506/spkx1002-6630-201118030

• 工艺技术 • 上一篇    下一篇

南极磷虾酶解工艺优化及模型建立

吕传萍1,2,李学英1,杨宪时1,*,郭全友1   

  1. 1. 中国水产科学研究院东海水产研究所
    2.上海海洋大学食品学院
  • 出版日期:2011-09-25 发布日期:2011-09-24
  • 基金资助:
    国家“863”计划项目(2011AA090801);中央级公益性科研院所基本科研业务费专项(2009T05)

Optimization and Modeling of Enzymatic Hydrolysis Process for Antarctic Krill

LU Chuan-ping1,2,LI Xue-ying1,YANG Xian-shi1,*,GUO Quan-you1   

  1. (1. East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China; 2. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China)
  • Online:2011-09-25 Published:2011-09-24

摘要: 以短肽得率(trichloroacetic acid-nitrogen soluble index,TCA-NSI)和水解度(degree of hydrolysis, DH)为指标,从7种常用酶中选出Alcalase酶作为酶解南极磷虾的最适酶。对Alcalase酶水解南极磷虾的酶用量、底物浓度、pH值、温度和时间5个因素进行单因素试验和正交旋转组合试验,建立TCA-NSI和DH与各因素的回归模型;在此基础上,结合实际生产确定Alcalase酶水解南极磷虾的最适工艺为温度50.7℃、pH8.01、加酶量3010U/g、时间239min,此时TCA-NSI值为73.02%,DH值为42.33%,短肽平均肽链长(peptide chain long,PCL)为2.36,平均相对分子质量为277.9。

关键词: 南极磷虾, Alcalase, 短肽, 水解度

Abstract: In the present work, alcalase was identified as the most suitable enzyme for enzymatic hydrolysis of Antarctic krill among 7 commonly used enzymes based on simultaneous consideration of chloroacetic acid-nitrogen soluble index (TCA-NSI) and degree of hydrolysis (DH). In order to optimize the hydrolysis of Antarctic krill by alcalase, the effects of the hydrolysis conditions enzyme dosage, substrate concentration, pH, temperature and hydrolysis time on TCA-NSI and DH were studied by one-factor-at-a-time and orthogonal rotary composite design methods. Two regression models with TCA-NSI or DH as a function of each hydrolysis condition were established. The optimal process conditions for hydrolyzing Antarctic krill with alcalase were 50.7 ℃ hydrolysis temperature, pH 8.01, 3010 U/g alcalase dosage and 239 min hydrolysis time. Under the optimal conditions, the TCA-NSI and DH were 73.02% and 42.33%, respectively. Meanwhile, peptides with an average length of 2.36 and a molecular mass of 277.9 were obtained.

Key words: Antarctic krill, alcalase, oligopeptide, hydrolysis degree

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