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.
中国人民解放军和中国人民武装警察部队按照中央军事委员会的规定，做好核事故应急相关工作。
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第十二条 国家支持仲裁机构加强与境外仲裁机构和有关国际组织的交流合作，积极参与国际仲裁规则的制定。
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2024年12月20日 星期五 新京报