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| Combined Effects of Modified Atmosphere Packaging with Different Gas Compositions and Chitosan-based Composite Coatings on Quality of Trachinotus ovatus during Refrigerator Storage |
| WANG Jiamei, FU Tengfei, LIU Yafu |
| College of Food Science and Engineering, Hainan University, Haikou 570228, China |
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Abstract To study the effects of modified atmosphere packaging (MAP) alone and in combination with chitosan-based composite coating on preserving the quality of Trachinotus ovatus, the fish samples were stored at refrigerator temperature for up to 14 days after treatment. Changes in sensory, microbiological and physicochemical properties were analyzed during the storage period. Results showed that MAP with CO2:N2:O2 = 80:10:10 (V/V) effectively inhibited the increase in total bacterial count, total psychrotrophic bacterial count, total volatile basic nitrogen (TVB-N) content and thiobarbituric acid reactive substances (TBARs) value, slowed down the change of color. The combined use of MAP with chitosan-nisin or chitosan-ε-polylysine coating further reduced the total bacterial count and total psychrotrophic bacteria count while decreasing the change of color difference (ΔE), and maintained lower levels of TBARs value and TVB-N content, thereby prolonging the storage life. No significant difference in sensory quality, physicochemical properties or microbial load was found between the chitosan-nisin and chitosan-ε-polylysine coating groups.
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2021, Vol. 35 
