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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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Sasha Baker, head of national security policy at OpenAI, and Katrina Mulligan, who leads national security for OpenAI for Government, also spoke at the OpenAI all-hands, according to the source. One of those officials said the relationship between Anthropic and the government had broken down because Anthropic cofounder and CEO Dario Amodei had offended Department of War leadership, including publishing blog posts that “the department got upset about.”
2024年12月25日 星期三 新京报