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Food Chem

Title:		The formation pattern of off-flavor compounds induced by water migration during the storage of sea cucumber peptide powders (SCPPs)
Author(s):		Wang K; Yang R; Sun N; Dong Y; Cheng S; Lin S;
Address:		"National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China. College of Food Science and Technology, Jilin University, Changchun 130062, PR China. Analysis and Test Center, Dalian Polytechnic University, Dalian 116034, PR China. National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China. Electronic address: linsongyi730@163.com"
Journal Title:		Food Chem
Year:		2019
Volume:		20180828
Issue:
Page Number:		100 - 109
DOI:		10.1016/j.foodchem.2018.08.123
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"The formation pattern of off-flavor compounds induced by water migration in sea cucumber peptide powders (SCPPs) stored at 25?ª+ degrees C and 75% RH for 24?ª+h and 80?ª+days were investigated. Water migration characteristic of SCPPs was monitored by LF-NMR. The effect of water migration on structure and morphology were analyzed by SEM, CD, and FTIR, respectively. The antioxidant activity of SCPPs was detected by EPR. Volatiles generated from SCPPs were detected by P&T-GC-MS. The antioxidant activity of SCPPs declined and structure exhibited abnormalities during the storage. After 24?ª+h of storage, kinds of aldehydes decreased and the content of alcohols increased obviously. After 80?ª+days, (Z)-3,5-dimethyl-2-(1-propenyl)-pyrazine and 1,2-benzenedicarboxylic acid-bis(2-methylpropyl) ester were identified as the characteristic off-flavor. These off-flavor compounds were probably formed through Maillard reaction. esterification, and microbial metabolism. This study can provide a basis for further exploration of the off-flavor formation mechanism"
Keywords:		"Aldehydes/analysis Animals Antioxidants/analysis/pharmacology Circular Dichroism Food Storage/*methods Gas Chromatography-Mass Spectrometry Magnetic Resonance Spectroscopy Maillard Reaction Microscopy, Electron, Scanning Peptides/analysis/*chemistry Phtha;"
Notes:		"MedlineWang, Ke Yang, Ruiwen Sun, Na Dong, Yifei Cheng, Sheng Lin, Songyi eng England 2018/10/31 Food Chem. 2019 Feb 15; 274:100-109. doi: 10.1016/j.foodchem.2018.08.123. Epub 2018 Aug 28"