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  • (2018) Número 34
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E bitaminaren gehikuntza urdail-hesteetako in vitro digestioan: efektu antioxidatzailea edo prooxidatzailea?

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Date
2018
Author
Nieva Echevarría, Bárbara ORCID
Goikoetxea Osés, Encarnación ORCID
Guillén Loren, María Dolores
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Ekaia 34 : 83-98 (2018)
URI
http://hdl.handle.net/10810/38979
Abstract
Lan honen helburua liho-olioaren urdail-hesteetako in vitro digestioan d,l-alfa-tokoferolaren gehitzeak (200, 2000 eta 20000 ppm) konposatu lipidikoen hidrolisian eta oxidazioan duen efektua aztertzea zen. Horretarako, protoi erresonantzia magnetiko nuklearra (1H NMR) teknika erabili zen. Jatorri sintetikoko E bitamina honen gehikuntzak ez zuen efekturik izan lipolisian, baina oxidazioa areagotu zuen, dosi-mendeko modu batean. Hau kate poliasegabeen degradazioaren eta oxidazio-konposatuen sorreraren handipenek nabarmendu zuten. Ikerlan honen kondizioetan, alfa-tokoferolaren presentziak aldehidoen eta hidroxi edo keto taldeak dituzten dieno konjugatuen sorreran lagundu zuen.; The aim of this study was to investigate the effect of linseed oil enrichment with d,l-alpha-tocopherol (200, 2000 and 20 000 ppm) on the hydrolysis and oxidation undergone by lipidic components during in vitro gastrointestinal digestion. Proton Nu-clear Magnetic Resonance (1H NMR) was the technique employed. Although the addi-tion of this synthetic form of vitamin E did not affect lipolysis, the advance of oxidation reactions increased in a concentration-dependent manner. This was evidenced by the in-crease of polyunsaturated chains degradation and of oxidation compounds generation. Under the conditions of this study, the formation of aldehydes and of conjugated dienes having a hydroxy or a keto group was favoured in the presence of alpha-tocopherol.
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