Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 62, Issue 2, Pages 1053-1059Publisher
ELSEVIER
DOI: 10.1016/j.lwt.2015.02.002
Keywords
Lateolabrax japonicas; epsilon-Polylysine; Sodium alginate; Microbiological characteristics; Sensory quality
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Funding
- National Natural Science Foundation of China [31401478, 31471639]
- National Key Technologies R&D Program of China during the 12th Five-Year Plan Period [2012BAD29B06]
- Food Safety Key Laboratory of Liaoning Province [LNSAKF2013011]
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The combined effects of a novel epsilon-polylysine/sodium alginate (PLSA) treatment on the sensory and physicochemical characteristics of Japanese sea bass (Lateolabrax japonicas) stored at 4 +/- 1 degrees C for 16 days were investigated. Fish pH value, total volatile basic nitrogen, free fatty acids, K-value, thiobarbituric acid reactive substances, colour, texture, microbiological and sensory quality were measured. Sea bass coated with PLSA maintained flesh colour and tissue hardness, and showed the lower microbial counts, including mesophilic, psychrophilic, enterobacteria, lactic acid bacteria and yeasts compared with the control. In addition, PLSA coating also delayed changes in lipid oxidation, protein degradation and nucleotide breakdown. The results also proved that PLSA coating effectively maintained the sensory quality of sea bass during the storage period. The efficiency was better than that of PL or SA treatment alone. Therefore, the PLSA coating can be applied for preservation of the sea bass to extend its shelf life and improve its preservation quality. (C) 2015 Elsevier Ltd. All rights reserved.
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