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.
标本兼治防风险、守底线，统筹发展和安全。习近平总书记指出：“安全是发展的前提，发展是安全的保障。”坚持统筹发展和安全，是我们党治国理政的一条重大原则。党的十八大以来，习近平总书记围绕统筹发展和安全、防范化解重大风险作出一系列重要论述，并提出总体国家安全观。国资央企是维护国家安全的“压舱石”，涉及能源、通信、重大装备制造等多个行业，必须更好统筹发展和安全，既保障国家战略安全，也抓好企业自身生产经营安全，不断筑牢“防”的底线，提升“稳”的能力。近年来，国资央企不断强化底线思维、风险意识，突出抓好重点领域风险防控，持续加大粮食安全、能源资源安全等领域投入力度，大幅提升产业链供应链韧性和安全水平；不断完善安全监管措施、健全风险防控体系，牢牢守住不发生重大风险底线，全力维护人民群众生命财产安全和社会大局稳定。
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