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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Indeed, Paramount is already in cost-cutting mode, after boss David Ellison merged it with his film studio Skydance last year. Many analysts are expecting further cuts, especially since Paramount took on debt to finance the deal.。关于这个话题，同城约会提供了深入分析
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But there are growing questions about whether the challenges he is facing could be here to stay.