title: Effect of a Phenolic Extract from Olive Vegetation Water on Fresh Salmon Steak Quality during Storage.
abstract: This study aimed to evaluate the antioxidant and antimicrobial effects of a phenolic extract from olive vegetation water on fresh salmon steaks stored at 4°C under modified atmosphere. Twenty-four salmon steaks were respectively immersed in solutions of the diluted phenolic extract at 1.5 g/L (A), 3 g/L (B), and water only as a control (CTR), packaged within a protective atmosphere (70% carbon dioxide, 25% nitrogen and 5% oxygen) and then stored at 4°C. After 2 h, and 3 and 6 days of storage, the fish samples were analysed for the total viable count,Enterobacteriaceaecount, pH, colour (CIE L*a*b* colour system), phenolic composition, atocopherol content, antioxidant activity by 2,2- diphenyl- 1-picrylhydrazyl (DPPH˙) assay, and thiobarbituric reactive substances (TBARS). A 3 g/L phenolic extract contributed positively to the hygienic quality of the salmon by reducing the microbial growth during storage. The treated samples were slightly yellower than the CTR but only at the beginning of storage. The flesh contained 6.2% of the total polyphenols present in the initial solutions, with various percentages of the single fractions. After 6 days storage, theα-tocopherol content in the CTR and A samples was statistically lower than the B group that also showed the lowest DPPH˙ and TBARS values. In conclusion, the phenolic extract increased the microbiological quality and antioxidant concentration and decreased the lipid oxidation of salmon steaks during storage at 4°C under modified atmosphere.
authors.affiliation: Department of Veterinary Medicine, University of Perugia , Perugia, Italy.
authors.forename: Dino
authors.initials: D
authors.lastname: Miraglia
authors.affiliation: Department of Agricultural, Food and Environmental Sciences, University of Perugia , Perugia, Italy.
authors.forename: Sonia
authors.initials: S
authors.lastname: Esposto
authors.affiliation: Department of Veterinary Medicine, University of Perugia , Perugia, Italy.
authors.forename: Raffaella
authors.initials: R
authors.lastname: Branciari
authors.affiliation: Department of Agricultural, Food and Environmental Sciences, University of Perugia , Perugia, Italy.
authors.forename: Stefania
authors.initials: S
authors.lastname: Urbani
authors.affiliation: Department of Agricultural, Food and Environmental Sciences, University of Perugia , Perugia, Italy.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Servili
authors.affiliation: Circeo Pesca S.r.l., San Mariano-Corciano (PG) , Italy.
authors.forename: Simona
authors.initials: S
authors.lastname: Perucci
authors.affiliation: Department of Veterinary Medicine, University of Perugia , Perugia, Italy.
authors.forename: David
authors.initials: D
authors.lastname: Ranucci
keywords: Antimicrobial; Antioxidant; Olive vegetation water; Phenolic extract; Salmon