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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There's lots of Moon on display tonight, so plenty of opportunity to do some Moon gazing. With just your naked eye, you'll be able to see the Mares Tranquillitatis, Vaporum and Serenitatis. With binoculars you'll also be able to see the Mare Nectaris, and the Alphonsus and Endymion Craters, and with a telescope you'll see also see he Apollo 16 and 11 landing spots, and the Rupes Altai.，推荐阅读safew官方版本下载获取更多信息
Author(s): Michael Pilipchuk, Chaitali Patil, Veera Sundararaghavan