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Food Funct

Title:		Lipid oxidation and flavor changes in saturated and unsaturated fat fractions from chicken fat during a thermal process
Author(s):		Han D; Deng S; Wang H; Huang F; Fauconnier ML; Li H; Zheng J; Meng L; Zhang C; Li X;
Address:		"Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China. zhangchunhui@caas.cn. Laboratory of Chemistry of Natural Molecules, Gembloux Agro-bio Tech, University of Liege, Gembloux 5030, Belgium. Shanxi Bangda Food Co., Ltd., Linfen 041000, China. Inner Mongolia Xibei Catering Group Co., Ltd., Huhhot 010000, China. Shanxi Yifa Tongcheng Agricultural Development Co., Ltd., Datong 037000, China"
Journal Title:		Food Funct
Year:		2023
Volume:		20230717
Issue:		14
Page Number:		6554 - 6569
DOI:		10.1039/d3fo01061a
ISSN/ISBN:		2042-650X (Electronic) 2042-6496 (Linking)
Abstract:		"Chicken fat, due to its rich fatty acids (FAs), is more prone to lipid oxidation and the production of volatile compounds. The aim of the present study was to investigate the oxidative characteristics and flavor changes of saturated (SFF) and unsaturated fat fractions (USFF) from chicken fat induced by heating (140 degrees C at 70 rpm min(-1) for 1 h and 2 h: SFF1, USFF1, SFF2 and USFF2). The FAs and volatile compounds were analyzed by gas chromatography-mass spectrometry (GC-MS) and two-dimensional gas chromatography time of flight mass spectrometry (GC x GC-ToFMS), respectively. The results showed that higher contents of unsaturated fatty acids (UFAs) were found in USFF compared to that in SFF, whereas USFF showed lower levels of saturated fatty acids (SFAs). With the extension of heating time, the SFA/UFA ratio in USFF and SFF significantly increased (p < 0.05), and more aldehydes, alcohols, ketones, and lactones were formed. Moreover, the odor activity values of 23 important compounds in USFF1-2 were significantly higher (p < 0.05) than those in SFF1-2. As revealed by principal component analysis (PCA) and cluster analysis (CA), it was obviously observed that all samples were divided into four clusters (USFF-SFF, USFF1-SFF1, USFF2, and SFF2). According to correlation analysis between FAs and volatile compounds, C18:2 omega6, C18:3 omega6 and C18:3 omega3 were significantly associated with dodecanal, (Z)-3-hexenal, (E)-2-decenal, 2-undecenal, (E)-2-dodecenal, (E,E)-2,4-nonadienal, (E,E)-2,4-decadienal, 2-decanone, gamma-octalactone and gamma-nonalactone. Our data elucidated that fat fractions from chicken fat with varying degrees of saturation could impart different flavor characteristics during a thermal process"
Keywords:		"Animals *Fats, Unsaturated Chickens Gas Chromatography-Mass Spectrometry/methods Odorants/analysis Alcohols/analysis Fatty Acids/analysis *Volatile Organic Compounds/analysis;"
Notes:		"MedlineHan, Dong Deng, Siyang Wang, Hang Huang, Feng Fauconnier, Marie-Laure Li, Hong Zheng, Jian Meng, Linchun Zhang, Chunhui Li, Xia eng England 2023/06/29 Food Funct. 2023 Jul 17; 14(14):6554-6569. doi: 10.1039/d3fo01061a"