酸性电解水预处理结合不同冰藏方式对大黄鱼保鲜效果的影响

Effects of acidic electrolyzed water pretreatment combined with different ice preservation on the quality of large yellow croaker(Pseudosciaena crocea)

为探究大黄鱼冰鲜贮藏期间理化指标(K值、色泽、质构)、微生物指标、水分迁移特性、微观结构、感官特性的变化,该实验设置酸性电解水预处理结合流化冰、酸性电解水冰、碎冰的处理组,可横向对比同种冰藏方式下预处理对品质的影响、纵向对比不同冰藏方式间的差异。结果表明,酸性电解水预处理的减菌作用能将初始菌落总数3.84 lgCFU/g降至3.06 lgCFU/g(P<0.05),杀菌率达87.2%,在同种冰藏方式下能更长时间维持产品在一级鲜度范围内;酸性电解水冰、流化冰贮藏均能在贮藏初期抑制K值、菌落总数上升,维持大黄鱼体表色泽、质构及感官特性,但流化冰因能提供持续的低温、阻氧条件在贮藏后期效果更优,可减缓肌原纤维蛋白结构劣化并抑制水分迁移;其中酸性电解水预处理复合流化冰贮藏组保鲜效果显著优于其他处理组,货架期为19 d,比同预处理下的酸性电解水冰组延长4 d,比碎冰组延长8 d。故酸性电解水与流化冰的协同作用是维持大黄鱼高品质、延长货架期的关键所在。

The effects of acidic electrolyzed water pretreatment combined with different ice storage methods(slurry ice,acidic electrolyzed water ice,crushed ice)on the physicochemical properties(K value,color,texture),microorganism,water mobility,microstructure and sensory properties of Pseudosciaena crocea were evaluated.Both the influence of pretreatment and different ice preservation could be observed through comparison.The results revealed that acidic electrolyzed water pretreatment could decrease the initial total viable count from 3.84 lgCFU/g to 3.06 lgCFU/g(P<0.05)owing to the antibacterial property,with the sterilization rate of 87.2%.The excellent grade time of Pseudosciaena crocea treated with acidic electrolyzed water was longer than its counterpart.Preservation with acidic electrolyzed water ice or slurry ice could inhibit the increase of K value,total viable counts,whereas the color of surface,the texture and sensory properties remained unchanged at the initial stage effectively.While the slurry ice was more competitive at the later storage because of its persistent low temperature and oxygen resistance,which could retard the deterioration of myofibrillar protein structure and water migration.Furthermore,the combined use of acidic electrolyzed water and slurry ice was significantly superior than other groups.The shelf life was extended to 19 days,while it was 15 days and 11 days after acidic electrolyzed water ice and crushed ice group respectively with the same pretreatment.The research indicated that the synergistic action of acidic electrolyzed water and slurry ice might offer an alternate strategy to keep high quality and extend the shelf life of Pseudosciaena crocea.