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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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伊朗方面已確認另外三名高級國防官員身亡，包括國防委員會秘書阿里·沙姆哈尼（Ali Shamkhani）、國防部長阿齊茲·納西爾扎德（Aziz Nasirzadeh），以及伊斯蘭革命衛隊總司令穆罕默德·帕克普爾（Mohammad Pakpour）。