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.
英國超市將巧克力鎖進防盜盒阻止「訂單式」偷竊
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paper: “plain textured paper”
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The boar's head standard was made from sheet bronze. It would have been held aloft in battle like a flag and used as a rallying point for troops.
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