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dc.contributor.authorMárquez Ruiz, Gloriaes_ES
dc.contributor.authorHolgado, Franciscaes_ES
dc.contributor.authorRuiz Méndez, Mª Victoriaes_ES
dc.contributor.authorVelasco, Joaquínes_ES
dc.contributor.authorGarcía-Martínez, M. del Carmenes_ES
dc.date.accessioned2016-06-01T09:40:10Z-
dc.date.available2016-06-01T09:40:10Z-
dc.date.issued2016-05-05-
dc.identifier.citationEuropean Food Research and Technology: (2016)es_ES
dc.identifier.issn1438-2377-
dc.identifier.urihttp://hdl.handle.net/10261/132819-
dc.description14 Páginas; 1 Tabla; 5 Figuras (en archivo aparte)es_ES
dc.description.abstractThe objective of this work was to monitor and compare formation of non-volatile and volatile oxidation compounds in a conjugated linoleic acid (CLA)-rich oil, Tonalin® oil (TO) and a linoleic acid (LA)-rich oil, safflower oil (SO) at 40 °C in the dark. In the TO, formation of hydroperoxides was negligible and the first and major compounds formed were polymerization products. When tocopherols were exhausted, the SO showed 152 meq O2/kg oil and 3 % polymers, values which are consistent with the expected progress of oxidation in unsaturated oils under these conditions, while the TO showed only 19 meq O2/kg oil of peroxide value and as much as 15 % polymers. In relation to the composition of volatile compounds, that found in the SO was close to that expected from the cleavage of the alkoxyl radicals formed from the LA-derived hydroperoxides, where hexanal is the main compound. However, the composition of volatile compounds of the TO was characterized by the occurrence of heptanal and t-2-nonenal, which were absent in the SO. An alternative route of formation for these distinct volatile oxidation compounds in TO could be scission of dioxoethanes coming from 1,2 cycloadditions of CLA with oxygen. Overall, the results obtained in this study, both on non-volatile and on volatile compounds, support that oxidation kinetics of CLA-rich oils differ substantially from that expected according to the hydroperoxide theory. Oxidation of CLA seems to proceed preferentially by the addition of the peroxyl radical to a double bond during propagation reactions, thus supporting the formation of oligomeric peroxides from the early events of lipid degradation.es_ES
dc.description.sponsorshipThis research was financially supported by Projects AGL2010-18307 and AGL2013-45110-R of the Spanish Ministry of Economy and Competitiveness (MINECO).es_ES
dc.language.isoenges_ES
dc.publisherSpringeres_ES
dc.relationMINECO/ICTI2013-2016/AGL2013-45110-Res_ES
dc.relation.isversionofPostprintes_ES
dc.rightsopenAccessen_EN
dc.subjectCLAes_ES
dc.subjectOxidationes_ES
dc.subjectVolatileses_ES
dc.subjectPolymerses_ES
dc.titleOxidation of a functional, CLA-rich oil: determination of volatile and non-volatile compoundses_ES
dc.typeartículoes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://doi.dx.org/10.1007/s00217-016-2698-9es_ES
dc.identifier.e-issn1438-2385-
dc.embargo.terms2017-05-05es_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)es_ES
dc.relation.csices_ES
oprm.item.hasRevisionno ko 0 false*
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003329es_ES
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