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.
他还否认了赴俄罗斯的可能性，表示愿在俄罗斯和白俄罗斯以外的地方与俄方对话。（新华社）
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据德国商业日报《商报》周二报道，BMW宝马正与欧盟委员会就最低限价机制展开谈判，该机制或将替代欧盟对这家德国车企中国产电动 MINI 车型征收的关税。此前，欧盟与大众集团已于2月初达成协议。经过数月谈判，大众旗下西雅特 / CUPRA品牌的纯电动SUV轿跑Tavascan已获得关税豁免。（新浪财经）
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