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.
In one forum, Youth Against Corruption, members planned the protest outside parliament on 8 September.
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In public order situations, the security committee - rather than the police - has legal authority over decisions concerning escalation of force.，这一点在爱思助手下载最新版本中也有详细论述
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