title: Display life of beef packaged with an antioxidant active film as a function of the concentration of oregano extract.
abstract: Fresh beef steaks were packaged with a new antioxidant active system containing increasing concentrations (0.5, 1, 2 and 4%) of an oregano extract. Control samples were packaged without the active film. Additional samples were sprayed with the extract and packaged as the control samples. Packages were filled with a 80%O(2)/20%CO(2) atmosphere and displayed under illumination (14 h) at 1 ± 1 °C for 28 days. Metmyoglobin formation, lipid oxidation (TBARS), instrumental colour (CIE a*) and sensory colour, discoloration, off-odour and oregano smell were determined. Active packaging significantly (P < 0.05) enhanced oxidative stability of beef steaks, depending on the oregano concentration of the active film. The display life of beef samples demonstrated that at least 1% oregano was needed for obtaining a significant increase of display life from 14 to 23 days. A concentration of 4% gave rise to unacceptable oregano smell. As a consequence, most suitable oregano extract concentrations for optimum active packaging in this system should be within the range 1-2%.
authors.affiliation: Dept of Animal Production and Food Science, Laboratory of Food Technology, Faculty of Veterinary Science, University of Zaragoza, 50013 Zaragoza, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Camo
authors.forename: Alberto
authors.initials: A
authors.lastname: Lorés
authors.forename: Djamel
authors.initials: D
authors.lastname: Djenane
authors.forename: José Antonio
authors.initials: JA
authors.lastname: Beltrán
authors.forename: Pedro
authors.initials: P
authors.lastname: Roncalés
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry*; D002417:Cattle; D018857:Food Packaging / Q000379:methods*; D016014:Linear Models; D050356:Lipid Metabolism; D008460:Meat; D008786:Metmyoglobin / Q000032:analysis / Q000378:metabolism; D031341:Origanum / Q000737:chemistry*; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry*; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis / Q000378:metabolism
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D017392:Thiobarbituric Acid Reactive Substances; D008786:Metmyoglobin