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Food Res Int

Title:		"Behaviour of non-oxidized and oxidized flaxseed oils, as models of omega-3 rich lipids, during in vitro digestion. Occurrence of epoxidation reactions"
Author(s):		Nieva-Echevarria B; Goicoechea E; Guillen MD;
Address:		"Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad n degrees 7, 01006 Vitoria-Gasteiz, Spain. Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad n degrees 7, 01006 Vitoria-Gasteiz, Spain. Electronic address: mariadolores.guillen@ehu.eus"
Journal Title:		Food Res Int
Year:		2017
Volume:		20170328
Issue:
Page Number:		104 - 115
DOI:		10.1016/j.foodres.2017.03.047
ISSN/ISBN:		1873-7145 (Electronic) 0963-9969 (Linking)
Abstract:		"Fresh and partially oxidized flaxseed oil, as models of omega-3 rich lipids, were submitted to in vitro gastrointestinal digestion. Hydrolysis level, lipid composition and oxidative status of the samples before and after digestion were studied by Proton Nuclear Magnetic Resonance ((1)H NMR) and Solid Phase Microextraction-Gas Chromatography/Mass Spectrometry (SPME-GC/MS). Although a great degree of lipolysis was reached in both kinds of samples after digestion, it was somewhat lower in the digests of oxidized flaxseed oil. The occurrence of lipid oxidation during digestion was evidenced by decreased unsaturated lipids and increased primary and secondary oxidation products, especially in oxidized samples. In these latter, linolenic-derived monoepoxy-octadecadienoates were the main oxidation products generated. SPME-GC/MS study showed the highest abundances of highly reactive alkadienals (C5-C10), alkatrienals (C9-C10) and linolenic-derived 4,5-epoxy-2-heptenals in the headspace of oxidized flaxseed oil digests. Volatile markers of Maillard-type reactions were also detected"
Keywords:		"Digestion Fatty Acids, Omega-3/*chemistry/*metabolism Humans Linseed Oil/*chemistry/*metabolism Magnetic Resonance Spectroscopy *Models, Biological Oxidation-Reduction Volatile Organic Compounds/analysis/chemistry/metabolism (1)h nmr (2E, 4E)-heptadienal (;"
Notes:		"MedlineNieva-Echevarria, Barbara Goicoechea, Encarnacion Guillen, Maria D eng Research Support, Non-U.S. Gov't Canada 2017/06/05 Food Res Int. 2017 Jul; 97:104-115. doi: 10.1016/j.foodres.2017.03.047. Epub 2017 Mar 28"