Univ Brest, INRAE, Laboratoire Universitaire de Biodiversité et Écologie Microbienne, F-29000, Quimper, France.
Univ Brest, INRAE, Laboratoire Universitaire de Biodiversité et Écologie Microbienne, F-29000, Quimper, France.
Food Microbiol. 2023 Sep;114:104289. doi: 10.1016/j.fm.2023.104289. Epub 2023 Apr 25.
The growth of six bacterial species (Carnobacterium maltaromaticum, Bacillus weihenstephanensis, Bacillus cereus, Paenibacillus spp., Leuconostoc mesenteroides and Pseudomonas fragi) was studied in various gas compositions. Growth curves were obtained at various oxygen concentrations (between 0.1 and 21%), or various carbon dioxide concentrations (between 0 and 100%). Decreasing the O concentration from 21% to about 3-5% has no effect on the bacterial growth rates, which are only affected by low oxygen levels. For each strain studied, the growth rate decreased linearly with carbon dioxide concentration, except for L. mesenteroides which remained insensible to this gas. Conversely, the most sensitive strain was totally inhibited by 50% of carbon dioxide in the gas phase at 8 °C. Predictive models were fitted, and the parameters characterizing the inhibitory effect of these two gases were estimated. This study provides new tools to help the food industry design suitable packaging for MAP storage.
研究了六种细菌（包括麦芽糖明串珠菌、酒香酵母、蜡状芽孢杆菌、类芽孢杆菌属、肠膜明串珠菌和脆弱拟杆菌）在不同气体组成中的生长情况。在不同的氧气浓度（0.1%至 21%之间）或不同的二氧化碳浓度（0%至 100%之间）下获得了生长曲线。将 O 浓度从 21%降低到约 3-5%不会影响细菌的生长速度，因为只有低氧水平才会影响生长速度。对于研究的每种菌株，除了对这种气体不敏感的肠膜明串珠菌外，其生长速率随二氧化碳浓度呈线性下降。相反，最敏感的菌株在 8°C 时，在气相中 50%的二氧化碳就会完全受到抑制。拟合了预测模型，并估计了这两种气体抑制作用的特征参数。这项研究为食品工业设计适合 MAP 储存的合适包装提供了新的工具。
