Abstract：
:In this study, chitosan coatings incorporated with propolis extract (PE) were utilized to extend the shelf-life of refrigerated Nemipterus japonicus fillets. Microbiological (total mesophilic bacteria (TMB) and total psychrotrophic count (TPC)), physicochemical (pH, total volatile bases nitrogen (TVB-N), 2-thiobarbituric acid reactive substances (TBARS), free fatty acid (FFA)) and sensory (color, odor and preference) characteristics of coated fillets were evaluated during 12days. The results showed that incorporating PE into chitosan solution could significantly (P<0.05) improve the quality of fish fillets. The results showed that the chitosan+PE samples reduced the extent of lipid oxidation, as judged by TBARS and FFA, suggesting that there is a synergistic effect between chitosan coating and propolis. Moreover, the application of chitosan coatings with PE improved the TVB-N and pH values of the Nemipterus japonicus samples significantly compared to untreated sample, thus extending the shelf life of Nemipterus japonicus fillet approximately >10days. All wrapped fillets in treatment samples incorporated with PE had lower bacterial counts compared to control (P<0.05). However, the bacterial counts of chitosan coating combined with PE were lower than those treated by chitosan or PE alone during the storage. The fillets treated with chitosan and PE had the best sensory properties. The increase (>10days) in the shelf-life was attributed to the antioxidant and antimicrobial characteristics of chitosan and PE. These results confirmed that chitosan coating enriched with PE can be an improving method to reducing deterioration of refrigerated Nemipterus japonicus fillets.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Ebadi Z,Khodanazary A,Hosseini SM,Zanguee Ndoi
10.1016/j.ijbiomac.2019.07.204subject
Has Abstractpub_date
2019-10-15 00:00:00pages
94-102eissn
0141-8130issn
1879-0003pii
S0141-8130(19)33694-3journal_volume
139pub_type
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