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  • Title: New Insights into the Changes of the Proteome and Microbiome of Shrimp ( Litopenaeus vannamei) Stored in Acidic Electrolyzed Water Ice.
    Author: Zhao L, Zhang Z, Wang M, Sun J, Li H, Malakar PK, Liu H, Pan Y, Zhao Y.
    Journal: J Agric Food Chem; 2018 May 16; 66(19):4966-4976. PubMed ID: 29708332.
    Abstract:
    Acidic electrolyzed water (AEW) ice is a novel technique for prolonging the shelf life of foods, but there is limited knowledge of its preservation mechanism. A proteomics approach and 16S rRNA-based Illumina sequencing were employed to investigate the changes of key proteins and bacterial communities in shrimp stored in AEW ice and tap water ice (TW ice) for 7 days. Compared with TW ice, AEW ice markedly retards the degradation of myofibrillar proteins in shrimp, including myosin, actin, and tropomyosin. Moreover, sarcoplasmatic proteins that participate in the carbohydrate catabolic process and amino acid metabolism were also influenced. Furthermore, the growth of spoilage bacteria, which includes the genera Psychrobacter, Shewanella, and Flavobacterium, was significantly inhibited by AEW ice, and the inhibition rates at day 7 were 71.6, 47.8, and 100%, respectively ( p < 0.05). Further correlation analysis showed the links between spoilage bacteria and protein changes can be broken by AEW ice treatment. Collectively, our findings indicated AEW ice can improve the quality of shrimp via previously undescribed mechanisms, which retarded the degradation of myofibrillar proteins and inhibited the growth of spoilage bacteria.
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