بررسي تاثير باكتريوسين Z و بنزوات سديم بر افزايش زمان ماندگاري فيله ي ماهي سفيد (Rutilus frisii kutum)

Effect of Bacteriocine Z and Sodium Benzoate on Shelf-life of Caspian Roach (Rutilus frisii kutum) Fillet

The effect of nisin Z (%0.2), and sodium benzoate (1.5 and 2.5 %) on Caspian roach (Rutilus frisii kutum) fillet shelf life at 40C for a 16 days has been studied. . Microbial parameters (total viable count, psychrotrophic, and LAB), and chemical parameters (PV, and TVN) have been monitored during the storage time with a 4 days intervals. .The results showed that TVN and PV, in control samples, exceeded the allowed limit after 12 days, but in combined treated samples (nisin +sodium benzoate) they were acceptable until 16 days. The microbial count showed that the count of TVC, PTC and LAB in control samples were higher than those for treated with nisin and sodium benzoate. It exceeded the allowed limit after 16 days, but they were acceptable in combined treated samples after d 16 days. Results from chemical and microbial analysis showed that simultaneous use of sodium benzoate, and nisin Z could improve the shelf life of Caspian roach fillet packed in vacuum at 40c..