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.
Drizzle over Prisma(Opus 4.6; Sonnet picks Prisma)
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老爸知道自己喊人抬牛的做法危险,他也怕再麻烦亲戚们,说自己记住了教训,以后会将牛犊拴起来。在农村,将一头牛拴住最保险的方式,是用一个铁环硬生生扎过牛的鼻孔,再套上连接槽边木桩的绳索,牛会因为怕疼,不敢摆脱缰绳逃跑。
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О том, что Париж и Лондон планируют передать Украине ядерное оружие, замаскировав его под самостоятельную разработку Киева, 24 февраля сообщила Служба внешней разведки России.
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