WITHDRAWN: Efficacy of Chitosan/propolis Liquid Extract Emulsion Coating on Refrigerated Storage Quality of Crayfish Meat 

Abstract

In this study, the efficiency of chitosan-propolis liquid extract coatings on the storage quality of crayfish meat at 4 ºC was studied. With respect to the treatments, chitosan at 2% (w/v) in 1% (v/v) of glycerol is dissolved and then emulsified with propolis liquid extract at 0.3 and 0.6 % (v/v). The control and treated samples were analyzed periodically for chemical (pH, Thiobarbituric acid, Peroxide value, Total volatile basic nitrogen and K values), microbiological (Total aerobic mesophilic bacteria, Psychrotrophic bacteria H2S-producing bacteria, Yeasts- Moulds) and sensorial attributes (Odor, Taste, Firmness and Overall acceptance) along storage. Results demonstrate that chitosan coatings containing propolis liquid extract are effective in controlling the growth of bacteria and chemical indices. These results can be beneficial for seafood processing sectors, as well as for food technologists.