title: Tomato waste: a potential source of hydrophilic antioxidants.
abstract: Waste obtained from six genotypes of tomato was subjected to evaluation as potential sources of hydrophilic antioxidants on the basis of content of total phenolics (TPh; from 11.7 to 18.6 mg/g), total flavonoids (TFl; from 7.62 to 12.1 mg/g) and ascorbic acid (AA; from 0.51 to 1.89 mg/g), and antioxidant activities. The antioxidant activities of tomato waste extracts were evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ferrous ion chelating activity (CA) and reducing power (RP) assay. The O(2) tomato waste extract was found to have the strongest antioxidant activity in scavenging DPPH radicals (effective concentration, EC(50) = 0.18 mg/ml). The Saint Pierre tomato waste extract showed the best performance in RP assay (EC(50) = 1.57 mg/ml). The Rutgers tomato waste extract exhibited a strongest CA (EC(50) = 1.49 mg/ml). The linear correlation analysis produced moderate-to-high correlation coefficients between the antioxidant activities and TPh, TFl and AA.
authors.affiliation: Faculty of Technology, University of Novi Sad, Novi Sad, Serbia.
authors.forename: Sladjana
authors.initials: S
authors.lastname: Savatović
authors.forename: Gordana
authors.initials: G
authors.lastname: Ćetković
authors.forename: Jasna
authors.initials: J
authors.lastname: Canadanović-Brunet
authors.forename: Sonja
authors.initials: S
authors.lastname: Djilas
mesh_terms: D000975:Antioxidants / Q000032:analysis / Q000494:pharmacology*; D001205:Ascorbic Acid / Q000032:analysis / Q000494:pharmacology*; D001713:Biphenyl Compounds / Q000378:metabolism; D002614:Chelating Agents / Q000378:metabolism; D019649:Food Industry; D005838:Genotype; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D018551:Solanum lycopersicum / Q000737:chemistry* / Q000235:genetics; D010851:Picrates / Q000378:metabolism; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D059808:Polyphenols / Q000032:analysis / Q000494:pharmacology*; D014866:Waste Products
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D002614:Chelating Agents; D010851:Picrates; D010936:Plant Extracts; D059808:Polyphenols; D014866:Waste Products; C004931:1,1-diphenyl-2-picrylhydrazyl; D001205:Ascorbic Acid