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.
Жители Санкт-Петербурга устроили «крысогон»17:52
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Everything in Business, plus:
Москвичей предупредили о резком похолодании09:45
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Argentina’s senate is poised to approve a sweeping overhaul of labour laws aimed at weakening trade unions and lowering labour costs for businesses.，这一点在safew官方版本下载中也有详细论述
Артемий Лебедев обратился в полицию из-за мошенника в ЕвропеБлогер Артемий Лебедев обратился в полицию в Черногории из-за обмана с жильем