Withdrawal would be first since France and India in 1950
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.。关于这个话题,WPS下载最新地址提供了深入分析
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而这个“交接期”,将长达半年(这还是DoW要求的时长,实际上这已经是非常高的要求了)。