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.
But there has been some energetic campaigning for change by high-profile figures, including Sir Chris Hoy, who has terminal prostate cancer, and Lord David Cameron, who recently revealed he'd been treated for it.
，更多细节参见搜狗输入法下载
Фото: Евгений Биятов / РИА Новости
How to watch Rockets vs. Magic for freeHouston Rockets vs. Orlando Magic in the NBA is available to live stream for free with a 30-day trial of Amazon Prime.