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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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广州天河华威达酒店的遭遇颇具代表性。这家老牌四星酒店因五年累积拖欠租金近360万元，于2026年1月被法院强制清退；西安天骊君廷酒店同样因五年租金拖欠，自2020年起逐步陷入经营困境，直至2025年11月被房东断水断电强制清退。这些案例并非孤例，而是正在蔓延的行业现实。
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