Before agar, microbiologists had experimented with other foodstuffs as microbial media. They turned to substances rich in the starches, proteins, sugars, fats, and minerals that organisms need for growth, testing with broths, bread, potatoes, polenta, egg whites, coagulated blood serums, and gelatine. However, none worked particularly well: all were easily broken down by heat and microbial enzymes, and their surface, once colonized, became mushy and unsuitable for isolating microbes.
Publication date: 28 February 2026
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Hull KR face Leeds in Sin City on Saturday, with the supporters they bring in tow illustrating the league’s value to the global game，详情可参考下载安装 谷歌浏览器 开启极速安全的 上网之旅。
Мерц резко сменил риторику во время встречи в Китае09:25，详情可参考Line官方版本下载
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