气调包装对大菱鲆的冷藏保鲜效果

以大菱鲆为研究对象，通过不同气调包装（60% CO2＋5% O2＋35% N2、60% CO2＋30% O2＋10% N2、40% CO2＋30% O2＋30% N2）进行处理，测定其感官、菌落总数、pH值、挥发性盐基氮（TVB-N）值、硫代巴比妥酸（TBA）值、汁液流失率等指标变化，综合评价气调包装对冷藏大菱鲆的保鲜效果。结果表明：空气包装组大菱鲆冷藏货架期为4 d，60% CO2＋5% O2＋35% N2气调包装组的保鲜效果最佳，货架期约为8 d；气调包装中高体积分数的CO2抑菌效果较为明显，能有效延缓pH值、菌落总数与TVB-N值的升高，但较高含量的CO2会导致鱼肉汁液流失较为严重；在鱼肉脂肪氧化方面，O2较CO2作用更大，高含量的O2对脂肪氧化具有一定促进作用；60% CO2＋5% O2＋35% N2气调包装组冷藏贮存8 d，大菱鲆的菌落总数为6.69（lg（CFU/g）），TVB-N值为11.99 mg/100 g，TBA值为2.34 mg/100 g。总体结果表明，气调包装能显著延长冷藏大菱鲆货架期，具有良好的保鲜抑菌作用。

Effect of Modified Atmosphere Packaging on Quality Preservation of Scophthalmus maximus during Cold Storage

This study aimed to evaluate the effects of modified atmosphere packages (MAPs) on quality maintenance of Scophthalmus maximus were packaged under different modified atmospheres (60% CO2 + 5% O2 + 35% N2, 60% CO2 + 30% O2 + 10% N2, and 40% CO2 + 30% O2 + 30% N2) for cold storage at 4 ℃. Changes in sensory evaluation score, total bacterial count, pH, total volatile basic nitrogen (TVB-N), thiobarbituric acid (TBA) and drip loss were measured during the storage. Results showed that the shelf-life of air-packaged S. maximus was 4 d, while that of MAP1 (60% CO2 + 5% O2 + 35% N2) treatment was the longest (8 d). High CO2 MAP had better antimicrobial effect and could significantly slow down the rise of pH, total bacterial count and TVB-N, but drip loss became more serious with increasing CO2 concentration. MAP, however, did not obviously inhibit lipid peroxidation in S. maximus but high O2 MAP accelerated lipid peroxidation. After eight days of storage with MAP1, total bacterial count of S. maximus turned out to be 6.69 (lg(CFU/g)), TVB-N was 11.99 mg/100 g, and TBA value was 2.34 mg/100 g. Thus, MAP could effectively extend the shelf-life of S. maximus during refrigerated storage and demonstrated good preservative and antibacterial effects.