title: Physicochemical characterization, antioxidant capacity, total phenolic and proanthocyanidin content of flours prepared from pequi (Caryocar brasilense Camb.) fruit by-products.
abstract: The potential of pequi by-products as substrates for the production of flours rich in antioxidant dietary fibers was evaluated. Dietary fiber contents ranged from 39.8 to 43.3g/100g with pectic polysaccharide fraction constituted of rhamnogalacturonans and hemicellulose fraction consisted of arabinogalactans, xylans and glucomannans. Total polyphenols, non-extractable proanthocyanidins (NEPA) and carotenoid contents of the flours were determined (respectively, 15.5-17.4g GAE/100g, 215.54-346.84mg/100g and 2116.52-3499.03μg/100g). The antioxidant capacities of pequi by-product flours (986.94-1154.42μM TE/g ABTS; 44.43-48.02g/g DPPH; and 3027.31-3216.27μmol Fe2SO4/g FRAP) were found to be exceptionally higher than those of fruits and fruits by-products reported in the literature. Exocarp removal promoted no significant changes in the technological properties of the flour, except for color. Results showed promising prospects for future exploitation of pequi peel as a potential source of dietary fiber and natural antioxidants.
authors.affiliation: PPGCA/Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil. Electronic address: danielapleao@gmail.com.
authors.forename: Daniela P
authors.initials: DP
authors.lastname: Leão
authors.affiliation: DEMEC/Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil. Electronic address: adriana@demec.ufmg.br.
authors.forename: Adriana S
authors.initials: AS
authors.lastname: Franca
authors.affiliation: DEMEC/Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil. Electronic address: leandro@demec.ufmg.br.
authors.forename: Leandro S
authors.initials: LS
authors.lastname: Oliveira
authors.affiliation: QOPNA, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal. Electronic address: ritabastos@ua.pt.
authors.forename: Rita
authors.initials: R
authors.lastname: Bastos
authors.affiliation: QOPNA, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal. Electronic address: mac@ua.pt.
authors.forename: Manuel A
authors.initials: MA
authors.lastname: Coimbra
mesh_terms: D000975:Antioxidants / Q000032:analysis; D002338:Carotenoids / Q000032:analysis; D004043:Dietary Fiber / Q000032:analysis; D020448:Ericales / Q000737:chemistry*; D005433:Flour / Q000032:analysis*; D005638:Fruit / Q000737:chemistry*; D059808:Polyphenols / Q000032:analysis*; D044945:Proanthocyanidins / Q000032:analysis*
chemical_list: D000975:Antioxidants; D004043:Dietary Fiber; D059808:Polyphenols; D044945:Proanthocyanidins; D002338:Carotenoids
keywords: Agricultural waste valorization; Antioxidant activity; Dietary fiber; Pequi peel; Polysaccharides; Proanthocyanidins; Technological properties