%0 Journal Article %T Monitoring of Physicochemical Changes in Frozen Fish Muscle Tissue %A Buchtov¨¢ %A Hana %A Je£¿ek %A Franti£¿ek %J - %D 2011 %X Sa£¿etak The aim of the study was to monitor physicochemical parameters (pH, nitrogen trimethylamine N-TMA, total volatile basic nitrogen TVBN, free fatty acids FFA, peroxide value and thiobarbituric acid assay TBA) of postmortal changes in muscle tissue of silver carp (Hypophthalmichthys molitrix) during a period of storage at -18¡ãC. Fresh silver carp samples and samples aft er three, six, nine and 12 months of storage were tested. The degree of acidification during the experiment was insignificant (P > 0.05). Proteolytic changes were almost stopped and TVBN levels remained unchanged (P > 0.05), while N-TMA levels fluctuated significantly (P < 0.01) between months 3 and 12. The essential were lipid hydrolysis and oxidation, which caused a significant increase in FFA values (5.89 ¡À 0.99% total lipids as oleic acid), peroxides (9.90 ¡À 2.83 mekv O2.kg-1) and TBA values (50.76 ¡À 31.52 mg MDA.kg-1). The shelf life recommended for silver carp was set at three months %K fish %K storage %K rancidity %K shelf life %U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=107282