Resumo

URIAS-ORONA, Vania; BASILIO HEREDIA, José; MUY-RANGEL, Dolores  e  NINO-MEDINA, Guillermo. Phenolic acids with antioxidant activity in maize bran and wheat bran. Ecosistemas y recur. agropecuarios [online]. 2016, vol.3, n.7, pp.43-50. ISSN 2007-901X.

Soluble and bound phenolic acids were obtained from maize and wheat bran and the level of total phenols were determined (Folin-Ciocalteu), phenolic acids (HPLC), antioxidant activity (DPPH, ORAC) and the presence of diferulic acids (UV spectra). The concentrations of total phenols, ferulic acid, and coumaric acid ranged from 1 637 to 9 718 µg EAF g^-1, from 12 to 4 527 µg g^-1 and from 7 to 664 µg g^-1, while the antioxidant activity µmol ET g^-1 acids 8-8', 8-5', 5-5' and 8-0-4' was identified in the bound fractions. All fractions presented significant levels of total phenols, phenolic acids and antioxidant activity, the bound fraction of maize bran being the one that presented the highest concentrations.

Palavras-chave : Phenolic acids; DPPH; Total phenols; ORAC; Maize bran; Wheat bran.

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