FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (14): 81-86.doi: 10.7506/spkx1002-6630-200914011

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Effects of Air-drying Ripening Processing on Lipolysis-oxidation of Dry-cured Duck

WANG Yong-Li, ZHANG Jian-hao*,JIN Guo-feng,ZHANG Yang-ping,LI Feng   

  1. Key Laboratory for the Processing and Quality Control of Domestic Animal Products,
    Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2008-10-30 Revised:2009-01-13 Online:2009-07-15 Published:2010-12-29
  • Contact: ZHANG Jian-hao*, E-mail:nau_zjh@sina.com,nau_zjh@yahoo.com.cn

Abstract:

The lipolysis-oxidation and its correlations with temperature, NaCl content and air-drying duration were investigated by comparing TBARs, POV and lipoxygenase activity in subcutaneous and intramuscular lipids of dry-cured duck (Cherry Valley variety) during high-temperature (18℃ for 24 h-21℃ for 48 h-24℃ for 72 h-26℃ for 96 h) and low-temperature (8℃ for 24 h-11℃ for 48 h-14℃ for 72 h-16℃ for 96 h) ripening. The results showed that in contrast with low-temperature processing, the POV in subcutaneous lipid was decreased by 30.77% after 72 h high-temperature ripening, and that in intramuscular lipid by 62.50% after 96 h drying; meanwhile, the activity of lipoxygenase was elevated by 7.26% while no significant changes were observed in TBARs. Additionally, the content of free fatty acid (FFA) was positively correlated with temperature during high-temperature processing; As well, NaCl content was significantly positively correlated with TBARs, suggesting that NaCl content and temperature were main factors responsible for lipolysis-oxidation.

Key words: dry-cured duck, TBARs, POV, FFA, lipoxygenase

CLC Number: