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how high speed is called ultracentrifugation? - (Jul/24/2014 )

How high speed of centrifugation is called ultracentrifugation? And what is the speed range of ultracentrifugation?


This is a tricky one but probably any speed above what you would find in a standard centrifuge, which would usually be around 20-30,000 rpm.


and they top out at ~100,000 rpm (sorvall) or ~90,000 rpm (beckman).


perhaps you can define it from the function, i.e. centrifugation speeds that are capable to separate/sediment organelles and other cell components and (macro-)molecules...