本研究旨在揭示细菌动力学对烤肉(Larou)品质和生物胺(BA)积累的影响。物理化学参数,游离氨基酸,BAs,氨基酸脱羧酶,并确定了微生物概况,在Larou成熟和储存过程中探索了它们的关系。结果表明,在拉罗成熟期,水分和亚硝酸钠显著降低(p<0.05),而pH值,NaCl,TBARS,挥发性碱性氮总量显著增加(p<0.05)。BAs主要在Larou的干熟和储存阶段形成,可能存在酪胺和苯乙胺中毒的风险。厚壁菌和放线菌是主要的门,优势属是葡萄球菌属,棒状杆菌和乳球菌。相关性分析显示棒状杆菌,短杆菌,乳酸菌,四球菌和葡萄球菌属。在确定Larou的质量和安全性方面发挥了至关重要的作用。
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This study aimed to reveal the impact of bacterial dynamics on the quality and biogenic amine (BA) accumulation of dry-cured Chinese bacon (Larou). Physicochemical parameters, free amino acids, BAs, amino acid decarboxylase, and microbial profiles were determined, and their relationships were explored during Larou ripening and storage. The results showed that moisture and sodium nitrite decreased significantly during the Larou ripening stage (p < 0.05), while pH, NaCl, TBARS, and total volatile basic nitrogen considerably increased (p < 0.05). BAs were mainly formed during the stages of dry-ripening and storage of Larou and may present a risk of tyramine and phenylethylamine poisoning. Firmicutes and Actinobacteriota were the predominant phyla, and the dominant genera were Staphylococcus, Corynebacterium and Lactococcus. Correlation analysis showed Corynebacterium, Brevibacterium, Lactobacillus, Tetragenococcus and Staphylococci spp. played a crucial role in determining the quality and safety of Larou.
UNASSIGNED: The online version contains supplementary material available at 10.1007/s10068-023-01472-1.