Evaluation Of The Effects Of Nano-Chitosan Coating On Quality Properties Of Cynoglossus arel Fish (Bloch & Schneider, 1801) During Superchilling (-3° C)

Fish corruption is due to biological reactions such as microbial growth, lipid oxidation and the activity of fish autolysisenzymes, resulting in a shorter shelf life of fish and other marine products. In the present study, the effects of nanochitosancoating on the quality of fillets of Cynoglossus arel fish were measured during superchilling (-3°C). Thus, largescaletonsole fillets were coated at three groups including the following: nanochitosan (% w/v chitosan and 2% sodiumtripolyphosphate, Nanochitosan), treated with 1% glacial acetic acid and distilled water as control sample. The controland coated sample were periodically evaluated for microbiological (total bacterial count (TVC)), physicochemical (totalvolatile nitrogen (TVBN), thiobarbituric acid (TBA), and trimethylamine (TMA)) and sensory properties (flavor andodor) (the number of sapmles= 45). Results showed that the samples coated with nano-chitosan, had lower Total viablebacteria, volatile nitrogen, thiobarbituric acid, trimethylamine and sensory properties than the control group.In general,the results showed that fish coating with nano-chitosan solution could effectively preserve the optimum quality of thesamples and increase their useful life compared to the control group during superchilling at -3°C.