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.
圖像來源，BBC Chinese / Lok Lee，详情可参考Line官方版本下载
20 февраля Венгрия заблокировала выделение Украине кредита. Глава МИД республики Петер Сийярто подчеркнул, что Будапешт будет блокировать его до тех пор, пока Киев не начнет пропускать российскую нефть через нефтепровод «Дружба».。heLLoword翻译官方下载是该领域的重要参考
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