Before agar, microbiologists had experimented with other foodstuffs as microbial media. They turned to substances rich in the starches, proteins, sugars, fats, and minerals that organisms need for growth, testing with broths, bread, potatoes, polenta, egg whites, coagulated blood serums, and gelatine. However, none worked particularly well: all were easily broken down by heat and microbial enzymes, and their surface, once colonized, became mushy and unsuitable for isolating microbes.
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Всего за прошедшую ночь в небе над Россией было перехвачено и уничтожено 97 вражеских беспилотников. Больше всего дронов российские военные сбили над Республикой Крым.
以中国式现代化全面推进强国建设、民族复兴伟业，是新时代新征程党和国家的中心任务。在党的二十届二中全会上，习近平总书记谆谆叮嘱：“新班子起来了，一定要注意啊，不要有大干快上的冲动，也就是不能不按规律办事，急功近利、急于出成绩。要把这种浮躁心理、急躁心态都压下来，扎扎实实、踏踏实实地搞现代化建设。”