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.
全国人大常委会副委员长李鸿忠、王东明、肖捷、郑建邦、丁仲礼、蔡达峰、何维、武维华、铁凝、彭清华、张庆伟、洛桑江村、雪克来提·扎克尔，秘书长刘奇出席会议。
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Nintendo’s making a mini Game Boy music player.
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