FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (2): 261-265.

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Enzymatic Hydrolysis on Prawn Head

 CHEN  Li-Hua, SHI  Xu-Wen, XIAO  Zuo-Bing, ZHOU  Pei-Gen   

  1. 1.College of Food Science and Technology, Shanghai Fisheries University, Shanghai 200090, China;2.Department of Biology and Food Engineering, Shanghai Institute of Technology, Shanghai 200233, China
  • Online:2008-02-15 Published:2011-08-24

Abstract: The best enzyme and its optimum conditions to enzymatically hydrolyze prawn heads were studied and the free amino acids were analyzed also in this study. The results showed that papain is the best enzyme and its optimum conditions are ratio of material to water 1:0.6, original pH 7.5 and E/S 775 U/g under 42 ℃ for 3 h. Under these conditions, the hydrolysis degree (DH) is up to 64.82%. To avoid the bitterness in the product, flavourzyme and papain are mixed up (1:1, E/S 775 U/g) with the processing conditions listed above. The product flavor is better than before while the DH is 58.01%. The amount of free amino acids increases greatly and the content of glutamic acid is the highest.

Key words:  , prawn head; enzymatic hydrolysis; technics; free amino acids;