title: Effect of a low-density polyethylene film containing butylated hydroxytoluene on lipid oxidation and protein quality of Sierra fish (Scomberomorus sierra) muscle during frozen storage.
abstract: Fresh sierra fish (Scomberomorus sierra) fillets were packed in low-density polyethylene films with butylated hydroxytoluene (BHT-LDPE) added. Fillets packed in LDPE with no BHT were used as controls (LDPE). The packed fillets were stored at -25 degrees C for 120 days in which the film released 66.5% of the antioxidant. The influence of the antioxidant on lipid and protein quality, lipid oxidation, muscle structure changes, and shear-force resistance was recorded. As compared to LDPE films, fillets packed in BHT-LDPE films showed lower lipid oxidation, thiobarbituric acid values (4.20 +/- 0.52 vs 11.95 +/- 1.06 mg malonaldehyde/kg), peroxide values (7.20 +/- 1.38 vs 15.15 +/- 1.48 meq/kg), and free fatty acids (7.98 +/- 0.43 vs 11.83 +/- 1.26% of oleic acid). Fillets packed in BHT-LDPE films showed less tissue damage and lost less firmness than fillets packed in LDPE. A significant relationship between lipid oxidation and texture was detected (R2 adjusted, 0.70-0.73). BHT-LDPE films may be used not only to prevent lipid oxidation but also to minimize protein damage to prolong the shelf life of sierra fish.
authors.affiliation: Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Blvd. Luis Encinas y Rosales s/n, Apdo. Postal 1658, Col. Centro, Hermosillo, Sonora, 83000 Mexico.
authors.forename: Wilfrido
authors.initials: W
authors.lastname: Torres-Arreola
authors.forename: Herlinda
authors.initials: H
authors.lastname: Soto-Valdez
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Peralta
authors.forename: José Luis
authors.initials: JL
authors.lastname: Cardenas-López
authors.forename: Josafat Marina
authors.initials: JM
authors.lastname: Ezquerra-Brauer
mesh_terms: D000818:Animals; D002084:Butylated Hydroxytoluene; D018857:Food Packaging / Q000295:instrumentation; D005519:Food Preservation; D005615:Freezing; D015227:Lipid Peroxidation; D009124:Muscle Proteins / Q000032:analysis*; D009132:Muscles / Q000737:chemistry; D010473:Perciformes; D020959:Polyethylene
chemical_list: D009124:Muscle Proteins; D002084:Butylated Hydroxytoluene; D020959:Polyethylene