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Effect of γ-irradiation on radical scavenging, reducing power and lipid peroxidation inhibition properties of hydroalcoholic extracts from Malva neglecta

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dc.contributor.authorPinela, José
dc.contributor.authorAntonio, Amilcar L.
dc.contributor.authorBarros, Lillian
dc.contributor.authorCarvalho, Ana Maria
dc.contributor.authorOliveira, Beatriz
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2015-10-26T11:13:11Z
dc.date.available2015-10-26T11:13:11Z
dc.date.issued2014
dc.description.abstractRadiation processing technology has been used to improve food security, safety and quality. However there are a few reports in the literature on the effect of irradiation on bioactivity of herbs and medicinal plants1. Hence, the present work was undertaken to investigate the dose-response effects of gamma irradiation on free radical scavenging, reducing power and lipid peroxidation inhibition properties of hydroalcoholic extracts prepared from wild Malva neglecta Wallr. In the north-eastern of Portugal, this annual herbaceous plant is traditionally eaten raw as leafy vegetable or prepared in herbal beverages due to its disinfectant and anti-inflammatory properties2. Thus, dried M. neglecta samples were exposed to 0 (control), 1, 5 and 10 kGy of γ-rays in a 60Co experimental chamber. After irradiation, processed samples were extracted using methanol:water (80:20 v/v) and the radicals scavenging activity evaluated through the 2,2-diphenyl-1- picrylhydrazyl (DPPH) free radicals assay, the reducing power by the ferricyanide/Prussian blue assay, and the lipid peroxidation inhibition by β-carotene/linoleate and thiobarbituric acid reactive substances (TBARS) assays. The obtained results suggest that the different irradiation doses affect the extracts bioactivity. In general, the free radicals scavenging activity and the reduction power decreased in irradiated samples (except for 5 kGy in the DPPH assay) compared with the non-irradiated control. On the other hand, the lipid peroxidation inhibition was improved by the irradiation treatment (except for 1 kGy in the TBARS assay). Both β-carotene/linoleate and TBARS assays showed low EC50 values (corresponding to a high lipid peroxidation inhibition), while the DPPH assay demonstrated the highest ones (corresponding to a low free radicals scavenging effect). The results herein reported support the use of gamma-irradiation as an effective technology to maintain or improve the lipid peroxidation inhibition properties of hydroalcoholic extracts of M. neglecta, and their traditional use in folk medicine.pt_PT
dc.identifier.citationPinela, José; Antonio, Amilcar L.; Barros, Lillian; Carvalho, Ana Maria; Oliveira, M.B.P.P.; Ferreira, Isabel C.F.R. (2014). Effect of γ-irradiation on radical scavenging, reducing power and lipid peroxidation inhibition properties of hydroalcoholic extracts from Malva neglecta. In 4th International Nuclear Chemistry Congress. São Paulopt_PT
dc.identifier.urihttp://hdl.handle.net/10198/12192
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationStrategic Project - UI 690 - 2011-2012
dc.relationRECOVERY OF THE SUSTAINABLE USE OF TRADITIONAL FOODS THROUGH EMERGING PRESERVATION TECHNOLOGIES
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleEffect of γ-irradiation on radical scavenging, reducing power and lipid peroxidation inhibition properties of hydroalcoholic extracts from Malva neglectapt_PT
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.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.citation.title4th-INCC, 4th International Nuclear Chemistry Congresspt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNamePinela
person.familyNameAntonio
person.familyNameBarros
person.familyNameCarvalho
person.familyNameFerreira
person.givenNameJosé
person.givenNameAmilcar L.
person.givenNameLillian
person.givenNameAna Maria
person.givenNameIsabel C.F.R.
person.identifier469085
person.identifierID G-7399-2011
person.identifier144781
person.identifier.ciencia-id771C-2B43-B108
person.identifier.ciencia-id1014-5259-DE86
person.identifier.ciencia-id9616-35CB-D001
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person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0001-7523-1637
person.identifier.orcid0000-0001-8271-9964
person.identifier.orcid0000-0002-9050-5189
person.identifier.orcid0000-0001-5508-5935
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridB-4466-2014
person.identifier.ridJ-1960-2014
person.identifier.ridJ-3600-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id54392272800
person.identifier.scopus-author-id44560921900
person.identifier.scopus-author-id35236343600
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.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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