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Effects of gamma irradiation and extraction method in the antioxidant potential of wild and commercial Tuberaria lignosa samples

2014Conference object Open access
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dc.contributor.authorPinela, José
dc.contributor.authorAntonio, Amilcar L.
dc.contributor.authorCabo Verde, Sandra
dc.contributor.authorBarreira, João C.M.
dc.contributor.authorCarvalho, Ana Maria
dc.contributor.authorOliveira, Beatriz
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2015-02-24T09:41:12Z
dc.date.available2015-02-24T09:41:12Z
dc.date.issued2014
dc.description.abstractIrradiation is recognized as a safe and effective food preservation method used worldwide to decontaminate and extend the shelf-life of fresh and dried agricultural products [1]. Tuberaria lignosa (Sweet) Samp. is one of the most popular medicinal plants in several regions of the Iberian Peninsula, used to treat various diseases and ailments [2]. Interesting antioxidant properties were already highlighted by our research group in this plant [3], which may be related to beneficial effects in human health by neutralizing free radicals that arise from various metabolic processes. In the present work, the effects of gamma irradiation (doses of 0, 1, 5 and 10 kGy performed in a Co-60 experimental equipment) and extraction method (water infusion or decoction) on the antioxidant activity of wild and commercial dried samples of T. lignosa were evaluated and compared. Four in vitro assays were used to evaluate the antioxidant activity, measuring DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity, reducing power, inhibition of β-carotene bleaching and inhibition of thiobarbituric acid reactive substances (TBARS) formation. The potential effects of irradiation dose, extraction method and plant origin were evaluated by discriminant analysis, using the stepwise procedure. The results showed that the different irradiation dose does not have significant effects on the antioxidant activity of the samples. Regarding the extraction method, decoctions showed higher antioxidant activity than infusions (lower EC50values) in all in vitro assays, probably due to a higher extraction yield of bioactive compounds. Additionally, the origin of the plant (wild or commercial) also had no effect on the analyzed parameters. The results herein reported support the traditional use of T. lignosa in folk medicine (especially decoction preparations), and also the use of gamma-irradiation as an effective technology to process this plant in order to maintain antioxidant potential.por
dc.description.sponsorshipCT (Portugal) for financial support to the research centre CIMO (PEst-OE/AGR/UI0690/2011), J. Pinela (SFRH/BD/92994/2013) and J.C.M. Barreira (SFRH/BPD/72802/2010) grantspor
dc.identifier.citationPinela, José; Antonio, Amilcar L.; Cabo Verde, Sandra; Barreira, João C.M.; Carvalho, Ana Maria; Oliveira, M. Beatriz P.P.; Ferreira, Isabel C.F.R. (2014). Effects of gamma irradiation and extraction method in the antioxidant potential of wild and commercial Tuberaria lignosa samples. In International Symposium on Food Safety and Quality: Applications of Nuclear and Related Techniques. Vienapor
dc.identifier.urihttp://hdl.handle.net/10198/11687
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherIAEA - International Atomic Energy Agencypor
dc.relationStrategic Project - UI 690 - 2011-2012
dc.relationRECOVERY OF THE SUSTAINABLE USE OF TRADITIONAL FOODS THROUGH EMERGING PRESERVATION TECHNOLOGIES
dc.relationBIOACTIVE PROPERTIES & CYTOPROTECTIVE POTENTIAL OF NATURAL EXTRACTS/INDIVIDUAL COMPOUNDS: APPLICATION OF SINGLE CELL GEL ELECTROPHORESIS AND OTHER BIOCHEMICAL, CHEMICAL AND ELECTROCHEMICAL ASSAYS
dc.subjectTuberaria lignosapor
dc.subjectGamma irradiationpor
dc.subjectExtraction methodspor
dc.subjectAntioxidant potentialpor
dc.titleEffects of gamma irradiation and extraction method in the antioxidant potential of wild and commercial Tuberaria lignosa samplespor
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleStrategic Project - UI 690 - 2011-2012
oaire.awardTitleRECOVERY OF THE SUSTAINABLE USE OF TRADITIONAL FOODS THROUGH EMERGING PRESERVATION TECHNOLOGIES
oaire.awardTitleBIOACTIVE PROPERTIES & CYTOPROTECTIVE POTENTIAL OF NATURAL EXTRACTS/INDIVIDUAL COMPOUNDS: APPLICATION OF SINGLE CELL GEL ELECTROPHORESIS AND OTHER BIOCHEMICAL, CHEMICAL AND ELECTROCHEMICAL ASSAYS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FAGR%2FUI0690%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F92994%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F72802%2F2010/PT
oaire.citation.conferencePlaceViena, Áustriapor
oaire.citation.titleInternational Symposium on Food Safety and Quality: Applications of Nuclear and Related Techniquespor
oaire.fundingStream6817 - DCRRNI ID
person.familyNamePinela
person.familyNameAntonio
person.familyNameBarreira
person.familyNameCarvalho
person.familyNameFerreira
person.givenNameJosé
person.givenNameAmilcar L.
person.givenNameJoão C.M.
person.givenNameAna Maria
person.givenNameIsabel C.F.R.
person.identifierID G-7399-2011
person.identifier144781
person.identifier.ciencia-id771C-2B43-B108
person.identifier.ciencia-id1014-5259-DE86
person.identifier.ciencia-idD31A-35AF-E2A9
person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0001-7523-1637
person.identifier.orcid0000-0001-8271-9964
person.identifier.orcid0000-0003-1233-0990
person.identifier.orcid0000-0001-5508-5935
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridB-4466-2014
person.identifier.ridJ-1960-2014
person.identifier.ridD-8269-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id54392272800
person.identifier.scopus-author-id44560921900
person.identifier.scopus-author-id54895546900
person.identifier.scopus-author-id20336503900
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
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
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