Singlet oxygen quenching and radical scavenging capacities of structurally-related flavonoids present in Zuccagnia punctata Cav

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dc.contributor.authorMoran Vieyra, Faustino E.
dc.contributor.authorBoggetti, Hector J.
dc.contributor.authorZampini, Iris C.
dc.contributor.authorOrdonez, Roxana M.
dc.contributor.authorIsla, Maria I.
dc.contributor.authorAlvarez, Rosa M. S.
dc.contributor.authorRosso, Veridiana Vera de [UNIFESP]
dc.contributor.authorMercadante, Adriana Zerlotti
dc.contributor.authorBorsarelli, Claudio D.
dc.contributor.institutionUniv Nacl Santiago del Estero
dc.contributor.institutionUniv Nacl Tucuman
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T13:52:06Z
dc.date.available2016-01-24T13:52:06Z
dc.date.issued2009-01-01
dc.description.abstractThe singlet oxygen ((1)O(2)) quenching and free radical (DPPH(center dot), ABTS(center dot+) and O(2)(center dot-)) scavenging ability of three structurally-related flavonoids (7-hydroxyflavanone HF, 2',4'-dihydroxychalcone DHC and 3,7- dihydroxyflavone DHF) present in the Argentinean native shrub Zuccagnia punctata Cav. were studied in solution by combining electrochemical and kinetic measurements, mass spectroscopy, end-point antioxidant assays and computational calculations. the results showed that the antioxidant properties of these flavonoids depend on several factors, such as their electron- and hydrogen atom donor capacity, the ionization degree of the more acidic group, solvatation effects and electrostatic interactions with the oxidant species. the theoretical calculations for both the gas and solution phases at the B3LYP level of theory for the Osanger reaction field model agreed with the experimental findings, thus supporting the characterization of the antioxidant mechanism of the Z. punctata flavonoids.en
dc.description.affiliationUniv Nacl Santiago del Estero, CONICET, INQUINOA, Fac Agron & Agroind, RA-4200 Santiago Del Estero, Argentina
dc.description.affiliationUniv Nacl Tucuman, Fac Bioquim Quim & Farm, INQUINOA CONICET, RA-4000 San Miguel de Tucuman, Tucuman, Argentina
dc.description.affiliationUniv Nacl Tucuman, INSIBIO CONICET, RA-4000 San Miguel de Tucuman, Tucuman, Argentina
dc.description.affiliationUniversidade Federal de São Paulo, Dept Ciencias Saude, Santos, SP, Brazil
dc.description.affiliationUniv Estadual Campinas, Fac Food Engn, Dept Food Sci, BR-13083862 São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Ciencias Saude, Santos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipCONICET
dc.description.sponsorshipANPCyT
dc.description.sponsorshipCICyT-UNSE
dc.description.sponsorshipCIUNT
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt
dc.format.extent553-U14
dc.identifierhttps://dx.doi.org/10.1080/10715760902912264
dc.identifier.citationFree Radical Research. Abingdon: Taylor & Francis Ltd, v. 43, n. 6, p. 553-U14, 2009.
dc.identifier.doi10.1080/10715760902912264
dc.identifier.issn1071-5762
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/31196
dc.identifier.wosWOS:000266979100005
dc.language.isoeng
dc.publisherTaylor & Francis Ltd
dc.relation.ispartofFree Radical Research
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dc.subjectAntioxidant capacityen
dc.subjectFlavonoiden
dc.subjectFree radicalsen
dc.subjectReactive oxygen species (ROS)en
dc.subjectSinglet oxygenen
dc.titleSinglet oxygen quenching and radical scavenging capacities of structurally-related flavonoids present in Zuccagnia punctata Caven
dc.typeinfo:eu-repo/semantics/article
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