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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.，更多细节参见同城约会
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Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04。业内人士推荐safew官方版本下载作为进阶阅读
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