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.
2025年，京津冀三地地区生产总值分别比上年增长5.4％、4.8％和5.6％，协同发展效能持续释放。
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In a ministerial statement, Luce said there had been more than 200 responses from individuals and businesses to a consultation on the plan for vehicles.
「她們回國只能等死」：香港重病外傭的掙扎2025年4月14日