title: Chemical evaluation, antioxidant capacity, and consumer acceptance of several oak infusions.
abstract: As part of an ongoing screening on natural products, 4 oak leaves were analyzed as potential nutraceutical beverages. The phenolic composition, antioxidant capacity, and sensory preferences of leaves infusions from Quercus resinosa, Q. sideroxyla, Q. eduadii, and Q. durifolia in comparison with 2 commercial green teas were investigated. Herbal infusions from oak leaves and Green teas (1%, 80 °C, 10 min) were evaluated for total polyphenol content (TPC), total flavonoid content (TFC), HPLC analysis, trolox equivalent antioxidant capacity (TEAC), oxygen radical absorbance capacity (ORAC), soluble solids, pH, color, and consumer preference analysis. Q. resinosa leaves infusions have shown the highest TPC, TEAC, and ORAC values but they have attained the lowest preference score. Quercus leaves infusions with higher content of gallic acid and catechins showed best antioxidant capacity but lower consumer preference.
authors.affiliation: Dept de Ings Química y Bioquímica, Instituto Tecnológico de Durango, Blvd Felipe Pescador 1830 Ote, Col Nueva Vizcaya, 34080 Durango, Dgo, México. nuria@itdposgrado-bioquimica.com.mx
authors.forename: Nuria Elizabeth
authors.initials: NE
authors.lastname: Rocha-Guzmán
authors.forename: Jose Roberto
authors.initials: JR
authors.lastname: Medina-Medrano
authors.forename: José Alberto
authors.initials: JA
authors.lastname: Gallegos-Infante
authors.forename: Rubén Francisco
authors.initials: RF
authors.lastname: Gonzalez-Laredo
authors.forename: Minerva
authors.initials: M
authors.lastname: Ramos-Gómez
authors.forename: Rosalía
authors.initials: R
authors.lastname: Reynoso-Camacho
authors.forename: Horacio
authors.initials: H
authors.lastname: Guzmán-Maldonado
authors.forename: Silvia Marina
authors.initials: SM
authors.lastname: González-Herrera
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000494:pharmacology; D001628:Beverages / Q000032:analysis*; D002392:Catechin / Q000032:analysis; D003258:Consumer Behavior; D019587:Dietary Supplements / Q000032:analysis; D005707:Gallic Acid / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry* / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry*; D059808:Polyphenols / Q000032:analysis; D029963:Quercus / Q000737:chemistry*; D017382:Reactive Oxygen Species / Q000032:analysis; D013662:Tea / Q000737:chemistry
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D059808:Polyphenols; D017382:Reactive Oxygen Species; D013662:Tea; D005707:Gallic Acid; D002392:Catechin