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This was not the first time that microbiologists experienced problems with agar. A phenomenon called “The Great Plate Count Anomaly” baffled researchers in the early 20th century when they observed that the number of cells seen under a microscope didn’t match the actual number of colonies growing on an agar plate. Investigating this discrepancy, researchers found agar itself to be the culprit: when nutrient broths are heated with agar during boiling, harmful byproducts (hydroperoxide) can form due to the reaction of agar with phosphate minerals contained in the media. Researchers can avoid this by autoclaving agar separately from the nutrient broth, or by reducing the amount of agar used.
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like validation rules for input. In other ways, they were very primitive,
Protesters scatter, ducking into the gaps between buildings and pavement. Some simply cover their heads for protection. Yogendra Nyaupane, 24, is hit and fatally wounded.
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当地时间2月27日，匈牙利外长西雅尔多在贝尔格莱德举行的匈牙利-塞尔维亚联合经济委员会会议后的新闻发布会上表示，匈塞铁路货运已正式开通，每天有10列货运列车在该线路运行，使得两国成为东南欧港口与西欧之间最便捷、最高效的货运通道。此外，匈塞铁路客运服务将于三月恢复，届时每天将有16趟直达的国际高速列车，其中4趟经布达佩斯连接维也纳和贝尔格莱德。