title: Purified phenolics from hydrothermal treatments of biomass: ability to protect sunflower bulk oil and model food emulsions from oxidation.
abstract: The phenolic fractions released during hydrothermal treatment of selected feedstocks (corn cobs, eucalypt wood chips, almond shells, chestnut burs, and white grape pomace) were selectively recovered by extraction with ethyl acetate and washed with ethanol/water solutions. The crude extracts were purified by a relatively simple adsorption technique using a commercial polymeric, nonionic resin. Utilization of 96% ethanol as eluting agent resulted in 47.0-72.6% phenolic desorption, yielding refined products containing 49-60% w/w phenolics (corresponding to 30-58% enrichment with respect to the crude extracts). The refined extracts produced from grape pomace and from chestnut burs were suitable for protecting bulk oil and oil-in-water and water-in-oil emulsions. A synergistic action with bovine serum albumin in the emulsions was observed.
authors.affiliation: Departament of Chemical Engineering, University of Vigo (Campus Ourense), Edificio Politécnico, As Lagoas, 32004 Ourense, Spain.
authors.forename: Enma
authors.initials: E
authors.lastname: Conde
authors.forename: Andrés
authors.initials: A
authors.lastname: Moure
authors.forename: Herminia
authors.initials: H
authors.lastname: Domínguez
authors.forename: Michael H
authors.initials: MH
authors.lastname: Gordon
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Parajó
mesh_terms: D000383:Agriculture; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D004655:Emulsions / Q000737:chemistry*; D005502:Food; D005511:Food Handling / Q000379:methods; D006358:Hot Temperature; D006868:Hydrolysis; D007220:Industrial Waste / Q000032:analysis; D010084:Oxidation-Reduction; D010636:Phenols / Q000302:isolation & purification / Q000494:pharmacology*; D010938:Plant Oils / Q000737:chemistry*; D012710:Serum Albumin, Bovine / Q000494:pharmacology; D000074242:Sunflower Oil; D014867:Water
chemical_list: D000975:Antioxidants; D004655:Emulsions; D007220:Industrial Waste; D010636:Phenols; D010938:Plant Oils; D000074242:Sunflower Oil; D014867:Water; D012710:Serum Albumin, Bovine