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来源:百度知道 编辑:UC知道 时间:2024/05/10 14:36:30
为了了解大肠杆菌在食品中的生长规律,本试验采集了扬州市场上的肉制品和乳制品共26份样品,通过常规方法进行大肠杆菌分离,并采用光电比浊法对分离出的疑似大肠杆菌的生长曲线进行了测定。分离结果表明26份样品中共分离出5株疑似大肠杆菌,分离率达19.2%。生长曲线表明这五株疑似大肠杆菌在接种后10小时内数目增加甚少,说明生长速度缓慢;但在接种12~24小时内细菌数以稳定的几何级数极快增长,说明细菌生长繁殖速度。

In order to understand the backwoods coli in food growth rule, this experiment has gathered in the Yangchow market meat product and the dairy products altogether 26 samples, carries on the backwoods coli through the conventional method to separate, and used the doubtful backwoods coli growth curve which the photoelectricity turbidimetric method half separated out to carry on the determination.The separation result indicated 26 sample Chinese Communist Party separates 5 doubtful backwoods coli, the separative rate reaches 19.2%.The growth curve indicated these five doubtful backwoods coli in vaccinates in the latter 10 hours the number to increase few really, the showing growth speed is slow; But in vaccinates in for 12~24 hours the bacterial content to grow extremely quickly by the stable geometric series, explanation bacterium growth reproduction speed.