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.
South Korea's 'movie of the year' is an indie story about a teen's trauma
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“要不试试顺风车？”爱人的提议点醒了我。要是能遇上顺路的车主，直接送到家门口，哪怕多花点钱，也比来回折腾强。于是，我在某顺风车App上发布了行程计划，标注了出发时间和目的地，满心期待能有合适的车主接单。没过多久，就有车主私信我，简单确认了行程细节后，我们约定了初二一早在小区门口碰面。
Author(s): Uttiyoarnab Saha, Ali Hamedani, Miguel A. Caro, Andrea E. Sand