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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，这一点在夫子中也有详细论述
She and the crew are enjoying the exaggerated story. Laughter erupted after each flip of the table and every slap.，推荐阅读雷电模拟器官方版本下载获取更多信息
17-летнюю дочь Николь Кидман высмеяли в сети за нелепую походку на модном показе20:47
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