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These functions can then be profiled randomly.
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.
到了奉节后，詹姆斯发现，吸引他的不止是诗意山水。在这里，他既能漫步古迹，也能体验直升机观光，传统与现代交织，旅行体验丰富立体。2025年，奉节接待境外游客5.86万人次，同比增长近2倍。