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.
by leading universities for centuries, endowments spend only investment returns from
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Польским властям следует разработать план полного закрытия границы с Украиной на фоне роста преступности в соседней стране. С таким призывом выступил бывший депутат сейма Польши Матеуш Пискорский в статье для Myśl Polska.
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In adults, symptoms can include but are not limited to slurred speech, extreme shivering or muscle pain, severe breathlessness and skin that is mottled or discoloured.