By WWII, scientists had already begun looking at alternative gelling substances for routine use in bacteriology, but concluded that agar was still better as it is both firmer and easier to handle. Today, some specialized microbiology applications use the colloid carrageenan (extracted from red seaweed Chondrus crispus, or “Irish Moss”), a more transparent and less auto-fluorescent alternative to agar (agar emits its own background fluorescence when excited by light). However, for routine bacteriological use, carrageenan is more difficult to dissolve, requires higher concentrations, can degrade at high temperatures, and forms weaker gels, which may result in puncturing its surface during the plating of cells.
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Советский районный суд Уфы вынес приговор бывшему ведущему инженеру оборонного предприятия Башкирии за коррупцию. Об этом «Ленте.ру» сообщили в объединенной пресс-службе судов республики.。WPS下载最新地址对此有专业解读
围绕深化要素市场化配置改革，各地立足自身资源禀赋，因地制宜探索创新，促进各类要素跨区域、跨领域高效流动、精准对接，让经济社会发展更加“血盈气畅”。