在日照市昱岚新材料有限公司智能车间,一卷3毫米厚的钢卷从生产线一端“吞”入,5分钟后便从另一端“吐”出,化作厚度不足0.1毫米的薄钢板。“钢比纸薄”的行业奇迹,在此生动上演。
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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