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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Apple's cheapest laptop is also its most repairable. iFixit gave the new MacBook Neo a 6/10 repairability score. Although that number would only be mediocre for, say, a game review or final exam grade, it's the MacBook line's highest iFixit score in about 14 years.，推荐阅读手游获取更多信息
fiber binding stacks. Getting this wrong means silent heap corruption.
Node-Based Robot Architecture