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Type: Artigo
Title: Phenolic acids and flavonoids of peanut by-products: antioxidantcapacity and antimicrobial effects
Author: Camargo, Adriano Costa de
Regitano-d'Arce, Marisa Aparecida Bismara
Rasera, Gabriela Boscariol
Canniatti-Brazaca, Solange Guidolin
Prado-Silva, Leonardo do
Alvarenga, Verônica Ortiz
Sant'Ana, Anderson S.
Shahidi, Fereidoon
Abstract: Peanut skin (PS) and meal from dry-blanched peanuts (MDBP) were evaluated as sources of phenolic compounds. PS rendered the highest total phenolic content, antioxidant capacity towards ABTS radical cation, DPPH and hydroxyl radicals as well as reducing power. Phenolic acids were present in PS and MDBP whereas proanthocyanidins and monomeric flavonoids were found only in PS as identified by HPLC-DAD-ESI-MSn. Procyanidin-rich extracts prevented oxidation in non-irradiated and gamma-irradiated fish model system. Both extracts inhibited the growth of gram-positive (Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, Geobacillus stearothermophilus) and gram-negative bacteria (Pseudomonas aeruginosa, Pseudomonas fluorescens, Salmonella Enteritidis, Salmonella Typhimurium, Escherichia coli). Regardless of the strain, phenolic acid-rich extracts showed the lowest minimum inhibitory capacity (MIC); therefore presenting higher antibacterial effect. The MIC of phenolic acid-rich extracts (24–49 μg phenolics/mL) was higher but comparable to Ampicillin (10 μg/mL). Thus, phenolics in PS and MDBP may serve as antioxidants and antimicrobial compounds
Subject: Compostos fenólicos
Country: Países Baixos
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.foodchem.2017.05.046
Date Issue: 2017
Appears in Collections:FEA - Artigos e Outros Documentos

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