“中国脱贫历程表明，本着滴水穿石、一张蓝图绘到底的韧性、恒心和奋斗精神，发展中国家的贫困问题是可以解决的，弱鸟是可以先飞、高飞的。”如今，中国的实践以一种可知可感的方式打破了“贫困是宿命”的迷思。
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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.
19:47, 27 февраля 2026Мир