Influence of Chitosan Nanocomposite and Rosemary ( Rosmarinus officinalis L.) Extract Coating on Quality of Huso huso Fillet Inoculated with Listeria monocytogenes During Refrigerated Storage.

Jafari, Alika; Jafarpour, Ali; Safari, Reza

This study aimed to evaluate the antilisterial and antioxidative effects of chitosan nanocomposites and rosemary extract coating on the fillet ofHuso husoinoculated withListeria monocytogenesduring refrigerated storage (4°C). Fish fillets were subjected as control (without coating), 0.5% rosemary extract (RE), 1% chitosan (CS), and combination of chitosan and rosemary extract as chitosan nanocomposite (CS/RE). Then, samples were inoculated withL. monocytogenes. Subsequently, the chemical parameters (total volatile basic nitrogen (TVB-N), peroxide value (PV), pH, and thiobarbituric acid (TBA)) and antilisterial effects of coatings were monitored during 16 days of storage at 4°C. According to the results, CS/RE demonstrated a significant (p< 0.05) ability to inhibit the growth ofL. monocytogenesfrom 4.14 log cfu/g to 2.23 log cfu/g at the end of the storage period, followed by CT and RET treatments, respectively, compared to the control. Even though samples coated with CS/RE had the lowest pH and TVB-N values (p< 0.05), this coating was not able to pause the protein denaturation after 8 days of storage (p> 0.05) compared to the other treatments. On the other hand, CS/RE coating retarded lipid oxidation by decreasing PV and TBA production in the samples compared to the control up to the end of refrigerated storage (p< 0.05).

CHITOSAN; ROSEMARY; LISTERIA monocytogenes

Journal of Aquatic Food Product Technology, 2017, Vol 26, Issue 6, p675

1049-8850

Academic Journal

10.1080/10498850.2016.1266427