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.
Цены на нефть взлетели до максимума за полгода17:55，详情可参考爱思助手下载最新版本
김현중, ‘꽃보다 남자’ 당시 인기? “100억 이상 벌었을 수도”，这一点在同城约会中也有详细论述
Wait — block until space becomes available