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.
那场葬礼之后，他和那边的联系渐渐多了起来。虽然五个兄弟姐妹各自在不同的地方讨生活，但谁家修了房子，谁家孩子要结婚，都会互相打个电话道声喜。
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这是a16z在2月最新报告里揭示的一个反差。
思想的伟力，跨越山海，指引前行道路。