Volume 16, Issue 89 (7-2019)
Abstract
Using the natural-based coating and natural preservatives has became a novel method in food packaging. Accordingly, the use of natural preservatives for prevention of spoilage and extend the shelf life of perishable foods like as fish burger has gained more attention. The aim of this paper was studying the effect of edible g on physiochemical, microbial and sensory characteristics of rainbow trout fish burger during 14 refrigerated storage. In this study, the effect of 2% gelatin coating containing different concentration of alga essential oil (0.3, 0.6, 0.9) on physiochemical (TBA, pH PV, TVB-N), microbial (PTC, TVC) and sensory properties were analyzed periodically during storage. According to the results, the combination effect of gelatin and alga essential oil on improvement the physiochemical and microbial values of treated samples were significantly higher than untreated samples (p<0.05), and this antimicrobial coating has significant effect to decrease the microbial spoilage and to extened the shelf life of rainbow trout fish burger during refrigerated storage.resulted in significant shelf life gelatin coating Dunaliealla salina alge essential oil 0.9% as compared to control sample (p<0.05).
Volume 19, Issue 123 (May 2022)
Abstract
Seafood contains compounds such as omega-3 fatty acids, fat-soluble vitamins, digestible proteins and micronutrients such as fluorine, calcium, iodine, copper, iron and zinc. Therefore, it is important to provide methods to increase the shelf life and also remove heavy metals from fish meat. In this study, using the biopolymers of chitosan (CS) and beta-cyclodextrin (β-CD), the oxidative stability of minced of commerson Scomberomorus fish during 12 days of refrigeration with chemical evaluations (acidity (pH), peroxide number (PV), and Thiobarbituric acid (TBA), water holding capacity (WHC)) and microbial (total microbial load count (TVC)) were studied. The ability of these two compounds to reduce the concentration of heavy metals during refrigeration was also investigated. According to the results, the use of CS and β-CD had a significant effect on the values of all indicators compared to the control treatment (P <0.05). Therefore, it can be said that the use of CS and β-CD is effective in reducing the oxidation and growth of minced meat bacteria during storage in the refrigerator. The lowest pH value was observed in T8 and T11 treatments, the lowest PV value was observed in T8, T10 and T11 treatments, the lowest TBA value was observed in T7 treatment, the highest WHC value was observed in T8 treatment and the lowest TVC value was observed in T8 and T11 treatments. The use of CS and β-CD solutions also reduced the concentration of heavy metals in the minced meat of commerson Scomberomorus, so that T8 treatment showed the best performance in reducing cadmium, lead and mercury and against nickel removal, different treatments had almost the same performance.
