第三十一条 当事人对仲裁协议的效力有异议的，可以请求仲裁机构或者仲裁庭作出决定，也可以请求人民法院作出裁定。一方请求仲裁机构或者仲裁庭作出决定，另一方请求人民法院作出裁定的，由人民法院裁定。
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.
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