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Gamma irradiation combined with freezing of Macrolepiota procera preserves tocopherols, one of the most powerful natural antioxidants

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dc.contributor.authorFernandes, Ângela
dc.contributor.authorAntonio, Amilcar L.
dc.contributor.authorOliveira, Beatriz
dc.contributor.authorMartins, Anabela
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2013-09-06T08:58:17Z
dc.date.available2013-09-06T08:58:17Z
dc.date.issued2013
dc.description.abstractVitamin E is the common name for a group of compounds which include tocopherols and tocotrienols. These compounds are lipophilic antioxidants with important effects in the body including, in the prevention of aging, strengthening the immune system and reducing cancer risk [1]. Mushrooms are a source of antioxidants and in particular of tocopherols [2], the most powerful natural antioxidants. Nevertheless, they are perishable and tend to lose quality after harvesting, which is an impediment to their distribution and marketing in fresh. Therefore, several processing techniques have been applied to extend mushrooms shelf life. In the present work, freezing and oven-drying were selected and applied separately and combined with gamma irradiation to Macrolepiota procera wild samples, in order to evaluate the effects on the content and profile of tocopherols. After collection (Bragança, Northeastern Portugal), fresh (kept at 4ºC), frozen (kept at -20ºC in a freezer) and dried (at 30 ºC in an oven) fruiting bodies were submitted to gamma irradiation, performed in experimental equipment with four 60Co sources, at 0.5 and 1 kGy. Tocopherols were determined by high performance liquid chromatography (HPLC) coupled to a fluorescence detector. The combination of two different processing technologies tended to preserve the level of total tocopherols. If we focused in this vitamin, combining the freeze treatment with a 0.5 kGy dose would optimize the amount of total tocopherols in M. procera samples. Furthermore, frozen and dried samples presented the lower amounts of γ-tocopherol and δ-tocopherol, respectively. Individually, the gamma irradiation dose did not cause any noticeable change, either for individual vitamers or for total tocopherols. Overall, gamma irradiation might act as a useful adjuvant to other conservation techniques such as freezing to preserve important antioxidant molecules.por
dc.identifier.citationFernandes, Ângela; Antonio, Amilcar L.; M. Beatriz, P.P. Oliveira; Martins, Anabela; Ferreira, Isabel C.F.R. (2013). Gamma irradiation combined with freezing of Macrolepiota procera preserves tocopherols, one of the most powerful natural antioxidants. In 1st Symposium on Medicinal Chemistry. Bragapor
dc.identifier.urihttp://hdl.handle.net/10198/8644
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSPQpor
dc.relationStrategic Project - UI 690 - 2011-2012
dc.relationStrategic Project - LA 6 - 2011-2012
dc.subjectMushroomspor
dc.subjectMacrolepiota procerapor
dc.subjectGamma irradiationpor
dc.subjectFreezingpor
dc.subjectDryingpor
dc.subjectTocopherolspor
dc.titleGamma irradiation combined with freezing of Macrolepiota procera preserves tocopherols, one of the most powerful natural antioxidantspor
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleStrategic Project - UI 690 - 2011-2012
oaire.awardTitleStrategic Project - LA 6 - 2011-2012
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FAGR%2FUI0690%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6820 - DCRRNI ID/PEst-C%2FEQB%2FLA0006%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F76019%2F2011/PT
oaire.citation.conferencePlace17 Maio, Braga, Portugalpor
oaire.citation.endPage51por
oaire.citation.startPage51por
oaire.citation.title1st Symposium on Medicinal Chemistrypor
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6820 - DCRRNI ID
oaire.fundingStreamSFRH
person.familyNameFernandes
person.familyNameAntonio
person.familyNameMartins
person.familyNameFerreira
person.givenNameÂngela
person.givenNameAmilcar L.
person.givenNameAnabela
person.givenNameIsabel C.F.R.
person.identifier144781
person.identifier.ciencia-id2015-0434-AE7C
person.identifier.ciencia-id1014-5259-DE86
person.identifier.ciencia-id7B18-A810-6B93
person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0002-0157-9873
person.identifier.orcid0000-0001-8271-9964
person.identifier.orcid0000-0001-6218-4413
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridJ-1960-2014
person.identifier.ridG-5488-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id44560921900
person.identifier.scopus-author-id7203013518
person.identifier.scopus-author-id36868826600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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