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.
Experimental therapy of applying stem cells during surgery could be ‘major milestone’ in treatment of birth defects，推荐阅读51吃瓜获取更多信息
Greg Ford, who lives in Buriton, East Hampshire, already separates his food waste for composting.。服务器推荐对此有专业解读
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