Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/7631
Título: Antioxidant potential of two red seaweeds from the brazilian coasts
Autor: Souza, Bartolomeu W. S.
Cerqueira, Miguel A.
Martins, Joana T.
Quintas, Mafalda A. C.
Ferreira, António C. S.
Teixeira, José A.
Vicente, António A.
Palavras-chave: Antioxidant
Seaweeds
Phenolic content
Data: 2011
Editora: American Chemical Society
Citação: SOUZA, Bartolomeu W. S....[et al] - Antioxidant potential of two red seaweeds from the brazilian coasts. Journal of Agricultural and Food Chemistry. ISSN 0021-8561.Vol. 59 (2011), p. 5589–5594
Resumo: In this work, in vitro antioxidant activity of two Brazilian red seaweeds, Gracilaria birdiae and Gracilaria cornea, was characterized. The total phenolic content, the radical-scavenging activity and the antioxidant activity were determined in two solvent extracts of the algae. Liquid chromatography mass spectrometry (LC MS/MS) allowed identification of important antioxidant compounds. The ethanol extract of G. birdiae was found to have the highest value of total phenolic content: 1.13 mg of gallic acid equiv (GAE)/g of extract.The radical-scavenging activity of G. birdiae and G. cornea extracts has been evaluated at different extract concentrations; the IC50 values of ethanolic extracts of G. cornea and G. birdiae were 0.77 and 0.76mgmL 1, respectively, while formethanolic extracts, the IC50 values of G. cornea and G. birdiae were 0.86 and 0.76mgmL 1, respectively. The antioxidant activities of these two seaweeds’ extracts as assessed by the β-carotene linoleic acid assay were equally high, achieving values of β-carotene oxidation inhibition of up to 40%. Finally, in the methanolic extracts, LC MS/MS allowed identification in both algae of two important antioxidants: apigenin and gallic acid.
Peer review: yes
URI: http://hdl.handle.net/10400.14/7631
Versão do Editor: http://pubs.acs.org/doi/abs/10.1021/jf200999n
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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