细菌数量阈值感应系统 quorum sensing ; QS
The results showed that the bacteria number changed with the seasons in seawater, but not too much in sediment and other environments.
结果显示，随着季节的变化海水中细菌数量变化显著，底泥及其他环境中变化不大；不同区域的海水中的细菌数量差异很大。
参考来源 - 青岛近岸不同环境中海洋弧菌的检测及用PCR方法快速检测病原鳗弧菌In four seasons of the spring, summer, fall, and winter, the concentration of both phosphate and ammonium has remarkable correlations to the bacterial abundance(BA), and they play important roles on the distribution of the BA.
在春夏秋冬四个季节中，磷酸盐和铵盐与异养浮游细菌数量之间都有较显著的相关性，对异养浮游细菌的分布起十分重要的作用。
参考来源 - 胶州湾无机营养盐对异养浮游细菌的影响研究·2,447,543篇论文数据，部分数据来源于NoteExpress
美国的细菌数量上限是每毫升水不超过500个菌落形成单位。
The U.S. bacterial limit is no more than 500 colony-forming units of bacteria per milliliter of water.
五分钟后，我们将培根或面包放在表面5秒、30秒或60秒，然后检测转移到食物上的细菌数量。
Five minutes after that, we placed either bacon or bread on the surface for 5, 30 or 60 seconds, and then measured the number of bacteria transferred to the food.
一项有关电脑键盘上细菌数量的最新研究称，以后捡起落在键盘上的食物碎屑往嘴里塞之前可得想好了。
Think twice before eating those dropped crumbs off your computer keyboard, according to a new study on the amount of germs on keyboards.
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