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.
第八十七条 旅馆业、饮食服务业、文化娱乐业、出租汽车业等单位的人员,在公安机关查处吸毒、赌博、卖淫、嫖娼活动时,为违法犯罪行为人通风报信的,或者以其他方式为上述活动提供条件的,处十日以上十五日以下拘留;情节较轻的,处五日以下拘留或者一千元以上二千元以下罚款。
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