不同气调包装组分协同壳聚糖基复合涂膜对金鲳鱼冷藏品质的影响

为研究气调包装组分及气调包装协同复合抑菌剂对金鲳鱼的保鲜效果，将新鲜金鲳鱼分别经气调包装和气调包装协同壳聚糖复合涂膜处理，分析14 d冷藏过程中金鲳鱼感官品质、微生物指标和理化指标的变化规律。结果表明：采用气体组分CO2、N2、O2体积比80∶10∶10气调包装能有效抑制金鲳鱼肉菌落总数、嗜冷菌总数、总挥发性盐基氮（total volatile basic nitrogen，TVB-N）含量和硫代巴比妥酸反应物（thiobarbituric acid reactive substances，TBARs）值增加，同时减缓鱼肉色泽变化；采用此气体组分包装与壳聚糖基复合涂膜（壳聚糖＋乳酸链球菌素、壳聚糖＋聚赖氨酸）协同处理金鲳鱼肉，能进一步减少冷藏过程中菌落总数和嗜冷菌总数，同时降低鱼肉颜色色差值变化，使TBARs值和TVB-N含量在整个冷藏期间维持在较低水平，有效延长金鲳鱼肉冷藏期，但壳聚糖＋乳酸链球菌素与壳聚糖＋聚赖氨酸涂膜处理组金鲳鱼肉的感官品质、理化指标和微生物数量无明显差异。

Combined Effects of Modified Atmosphere Packaging with Different Gas Compositions and Chitosan-based Composite Coatings on Quality of Trachinotus ovatus during Refrigerator Storage

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.