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.
11. World Economic Situation and Prospects 2026 | UN Trade and Development (UNCTAD), unctad.org/publication…
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正如当地一名干部所言，就像珍珠项链，“珠”是经营主体，颗粒饱满、绽放光彩，看不见的“线”则是营商环境，串珠成链、形成合力。对企业“无事不扰、有求必应”，为企业发展壮大减轻负担、持续赋能，有助于催生大企业顶天立地、中小企业铺天盖地、创新企业竞相生长的“热带雨林”生态。