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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Among the 19 people killed in the capital, Kathmandu, on 8 September last year was a teenager in school uniform, who had been walking away from the crowd when he was shot in the back of the head. Dozens more were injured.，详情可参考旺商聊官方下载
Student Colby Wallis,18, tells Newbeat she was "really upset and quite annoyed" after learning the festival was moving outside the UK.