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dc.contributor.author
Mohtar Mohtar, Lina Goumana
dc.contributor.author
Messina, Germán Alejandro
dc.contributor.author
Bertolino, Franco Adrián
dc.contributor.author
Pereira, Sirley Vanesa
dc.contributor.author
Raba, Julio
dc.contributor.author
Nazareno, Mónica Azucena
dc.date.available
2020-10-29T14:17:48Z
dc.date.issued
2020-11
dc.identifier.citation
Mohtar Mohtar, Lina Goumana; Messina, Germán Alejandro; Bertolino, Franco Adrián; Pereira, Sirley Vanesa; Raba, Julio; et al.; Comparative study of different methodologies for the determination the antioxidant activity of Venezuelan propolis; Elsevier Science; Microchemical Journal; 158; 11-2020; 1-8
dc.identifier.issn
0026-265X
dc.identifier.uri
http://hdl.handle.net/11336/117130
dc.description.abstract
Propolis is a complex resinous substance produced by bees. Its physical and chemical composition vary according to the flora near the apiary and its geographical origin. Seven propolis samples, collected from different productive areas from Venezuela were selected to characterize their main antioxidant properties taking as reference well recognized samples from Argentina and Brazil. Total phenolic compound and flavonoid contents were determined by Folin-Ciocalteu and AlCl3 methods, respectively. The antiradical activity (ARA) was evaluated by bleaching techniques using both the 1,1-diphenyl-2-picrylhydrazyl (DPPH[rad]) radical and 2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) radical (ABTS[rad]+). Ferric ion reducing power (FRAP) and the antioxidant activity (AAO) by the β-carotene bleaching method induced by lipoxygenase were also determined. The electrochemical behavior of the ethanolic extracts was evaluated by cyclic voltammetry. The values obtained using the different methodologies showed variable results among different samples even being from the same provenance. Phenolic contents of Venezuelan propolis reached values in a wide range between 19.1 and 107 mg GAE/g. Flavonoid contents varied between 2.6 and 8.5 mg QE/g. Samples from Bolivar and Miranda did not differ statistically each other in their properties, although, can be distinguished from other provenances as Argentinean and Brazilian. Regarding to the electrochemical behavior, half of the samples showed two oxidation peaks. The remaining ones had correlation between the IC50 from O2[rad]− and DPPH[rad] scavenging assays. The highest correlations were found between FRAP and IC50 (O2[rad]−) (R = 0.70); IC50 (DPPH) (R = 0.89) and phenolic contents (R = 0.93). These results demonstrated that the cyclic voltammetry is a useful tool to remark differences among propolis according their antioxidant profile.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ANTIOXIDANT
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PROPOLIS
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POLYPHENOLS
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CYCLIC VOLTAMMETRY
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Química Analítica
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Comparative study of different methodologies for the determination the antioxidant activity of Venezuelan propolis
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-10-27T17:48:43Z
dc.journal.volume
158
dc.journal.pagination
1-8
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Mohtar Mohtar, Lina Goumana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Centro de Investigación en Biofísica Aplicada y Alimentos. - Universidad Nacional de Santiago del Estero. Centro de Investigación en Biofísica Aplicada y Alimentos; Argentina
dc.description.fil
Fil: Messina, Germán Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentina
dc.description.fil
Fil: Bertolino, Franco Adrián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentina
dc.description.fil
Fil: Pereira, Sirley Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentina
dc.description.fil
Fil: Raba, Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentina
dc.description.fil
Fil: Nazareno, Mónica Azucena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina
dc.journal.title
Microchemical Journal
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0026265X20315034
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.microc.2020.105244
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