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2024年12月20日 星期五 新京报，详情可参考WPS下载最新地址
By WWII, scientists had already begun looking at alternative gelling substances for routine use in bacteriology, but concluded that agar was still better as it is both firmer and easier to handle. Today, some specialized microbiology applications use the colloid carrageenan (extracted from red seaweed Chondrus crispus, or “Irish Moss”), a more transparent and less auto-fluorescent alternative to agar (agar emits its own background fluorescence when excited by light). However, for routine bacteriological use, carrageenan is more difficult to dissolve, requires higher concentrations, can degrade at high temperatures, and forms weaker gels, which may result in puncturing its surface during the plating of cells.
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«Первая в мире "демократия", где выборы не важны… За это платите ВЫ. Отвечая на его вопрос: и американцы, и русские хотят, чтобы Зеленский ушел. Он безумен», — отметил аналитик.