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.
After 11 episodes of conga lines and commiseration, The Traitors Season 4 comes to a close this week. But who will come out on top in this game of betrayal and murder? Will Traitor Rob Rausch continue to steamroll the competition with the help of new compatriot Eric Nam? Or will the Faithfuls finally come to their senses and realize Rob's been playing them masterfully this whole time? — B.E.，推荐阅读WPS官方版本下载获取更多信息
Филолог заявил о массовой отмене обращения на «вы» с большой буквы09:36，详情可参考safew官方版本下载
广州天河路商圈是全市离境退税申请开单量和销售额最多的地方。其中，天环广场共有40多家离境退税商店，成为广州第一个集中退付点所在地。，推荐阅读雷电模拟器官方版本下载获取更多信息