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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Так она ответила на вопрос, возможен ли сценарий «второго Чернобыля» из-за бомбардировок ядерных объектов в Иране. «Конечно. Это недопустимо — то, как Запад манипулирует ядерной темой», — сказала дипломат.
希望能有Apple TV，mac mini估计要到6月了
The first-ever Lego Pokémon sets are here. Everyone's favorite Danish toy company revealed the highly anticipated sets at the start of the year and they became officially available for preorder from Jan. 12. To coincide with Pokémon Day (yes, that's a real thing), all three sets officially launch on Feb. 27, 2026. That day has finally come.