From Big Medical Encyclopedia

The ULTRACENTRIFUGE — the device for the accelerated sedimentation of colloid particles based on action of centrifugal force (range of speeds of a rotor — to 80 000 in 1 min.), providing particle sorting in finely divided suspensions and colloidal solutions; it is applied in biochemical researches, napr, during the determination of molecular weight of high-molecular compounds — see the Centrifuge.