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Agar was first introduced into the laboratory in 1881. Since then, microbiologists have depended on agar to create strong jellies. When microorganisms are streaked or plated onto this jellied surface and incubated, individual cells multiply into distinct colonies that scientists can easily observe, select, and propagate for further experiments. Many of the most important findings in biological research of the last 150 years or so — including the discovery of the CRISPR/Cas9 gene-editing tool — have been enabled by agar.4 Agarose, a derivative of agar, is also essential in molecular biology techniques like gel electrophoresis, where its porous gel matrix separates DNA fragments by size, enabling researchers to analyze and isolate specific genetic sequences.
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Зарина Дзагоева
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"We have to let them participate in that. But I do think that access to children should be conditional, and it should be conditional on respecting their rights, on keeping them safe, on actually not addicting them and not extracting economic value out of their behaviour."。爱思助手下载最新版本对此有专业解读
Раскрыты подробности похищения ребенка в Смоленске09:27