جستجوی مقالات مرتبط با کلیدواژه "اسانس پونه کوهی" در نشریات گروه "دامپزشکی"

Chicken meat is one of the most perishable foods. coating and modified atmosphere packaging are the new methods to increase its shelf-life. The present study was conducted to evaluate the effect of carrageenan edible coating () containing (Mentha longifolia) essential oil () under modified atmosphere packaging (% O ، % N ، % Co) on the quality of chicken meat during refrigerated storage. Samples were separated into three groups: uncoated (control), coated with carrageenan and coated with carrageenan contained essential oil (Mentha longifolia) were stored at refrigerator temperature for days and microbial (bacterial count of psychrotrophic and mesophilic), chemical properties (pH, total volatile nitrogen (TVN) and thiobarbituric acid (TBA)) and sensory characteristics (appearance, muscles elasticity, odor and color). Were evaluated at regular intervals storage time (days , , , , , , and). The results of the bacterial analysis showed that coating with carrageenan and carrageenan- essential oil coatings had significant effects on delaying the increasing trend of psychrophilic and mesophilic bacterial counts as compared to control. Chemically, carrageenan- essential oil treatment showed lower TBA, TVN and pH values than the other two groups during storage (P <). The carrageenan and carrageenan contained essential oil treatments that maintained sensorial factors at acceptable levels for and days respectively. According to the results, the carrageenan and carrageenan- essential oil coating could extend the shelf life of chicken fillets for and days.

The coating is one of the methods to extend the chicken fillet shelf life. The present study was conducted to evaluate the effect of carrageenan edible coating (1%) containing (Mentha longifolia) essential oil (1.5%) on the quality of chicken fillet during refrigerated storage. Samples were separated into three groups: uncoated (control), coated with carrageenan and coated with carrageenan contained essential oil (Mentha longifolia) were stored at refrigerator temperature for 21 days and were evaluated for microbial (psychrotrophic and mesophilic) counts, chemical properties [pH, total volatile nitrogen (TVN) and thiobarbituric acid (TBA)] and sensory characteristics (appearance, muscles elasticity, odor, and color). The results of the bacterial analysis showed that coating with carrageenan and carrageenan- essential oil coatings had significant effects on delaying the increasing trend of psychrophilic and mesophilic bacterial counts as compared to control. Chemically, carrageenan-essential oil treatment showed lower TBA, TVN, and pH values ​​than the other two groups during storage (p < 0.01). Moreover, the carrageenan and carrageenan contained essential oil treatments maintained sensorial factors at acceptable levels for 3 and 9 days respectively. Based on the results of the present study, carrageenan coating did not have the ability to extend the shelf life of chicken fillets but, the carrageenan-essential oil coating could extend the shelf life of chicken fillets for 9 days.

Due to its high concentration of polyunsaturated fatty acids, poultry meat is prone to oxidative deterioration. The aim of this study was to investigate the effect of essential oils of thyme, oregano and their combination in comparison with virginiamycin on quality of quail’s meat. The dietary treatments consisted of the basal control (without any added compounds or with 100 mg/kg of virginiamycin), 100 and 200 mg/kg of thyme and oregano essential oils, as well as an equal mixture of thyme and oregano essential oil (levels of 50 and 100 mg /kg). At the end of 35 days of the experiment, two birds from each group were slaughtered for testing the meat quality (including malondialdehyde, pH, water holding capacity, dripping loss and cooking loss). Results showed that essential oils of thyme, oregano and their mixture reduced the thiobarbituric acid value, dripping loss and cooking loss; on the other hand pH value and water holding capacity was increased. Oregano and thyme essential oils contain compounds with high antioxidant properties. Therefore, the presence of these compounds in the bloodstream and their accumulation in the muscle tissue could results in an increase in the antioxidant capacity and consequently enhance the keeping quality of meat. It seems that the application of natural antioxidants such as thymol or carvacrol could be helpful to improve the quality of poultry meat.