title: Effect of thyme oil on the preservation of vacuum-packaged chicken liver.
abstract: In this study fresh chicken liver meat was stored under vacuum packaging (VP) and under refrigeration (4 °C). The following treatments were used: V (control samples, stored under VP), VT1 (thyme oil; 0.1% v/w, stored under VP) and VT2 (thyme oil; 0.3% v/w, stored under VP). Lipid oxidation was low, as judged by determination of malondialdehyde (MDA) values, in vacuum-packaged chicken liver meat, both in the absence or presence of thyme essential oil (EO) during the entire storage period. Of the color parameters (L*, a*, b*) monitored during storage time, L* (lightness) values for vacuum-packaged chicken liver, irrespective of treatment, showed a varying trend, whereas a* (redness) values for V, VT1, and VT2 liver samples decreased, showing no significant differences. As determined by sensory analysis the observed shelf life of chicken liver samples was longest for VT2 (>12 d) followed by VT1 (12 d) and control (V) samples (7 d). Our results suggest that a Brochothrix thermosphact count (7 log CFU/g) and appearance of visible colonies can be used as indicators of chicken liver spoilage.
authors.affiliation: Department of Chemistry, University of Ioannina, Ioannina 45110, Greece.
authors.forename: Stefania
authors.initials: S
authors.lastname: Papazoglou
authors.forename: Maria
authors.initials: M
authors.lastname: Tsiraki
authors.forename: Ioannis N
authors.initials: IN
authors.lastname: Savvaidis
mesh_terms: D000818:Animals; D058640:Brochothrix / Q000254:growth & development / Q000302:isolation & purification; D055598:Chemical Phenomena; D002645:Chickens; D015169:Colony Count, Microbial; D003258:Consumer Behavior; D005506:Food Contamination / Q000517:prevention & control; D005516:Food Microbiology; D018857:Food Packaging / Q000379:methods*; D005519:Food Preservation / Q000379:methods*; D061353:Food Storage; D006801:Humans; D008099:Liver; D008460:Meat / Q000382:microbiology*; D009812:Odorants / Q000032:analysis; D009822:Oils, Volatile / Q000494:pharmacology*; D010938:Plant Oils / Q000494:pharmacology*; D013649:Taste; D046930:Thymus Plant / Q000737:chemistry; D014618:Vacuum
chemical_list: D009822:Oils, Volatile; D010938:Plant Oils