Значения термина purify by centrifugation на английском

Islets were isolated from human pancreases by the distention method and purified by centrifugation on Ficoll or Percoll gradients.

Viruses are purified by centrifugation using discontinuous sucrose or cesium chloride (CsCl) gradients and resulting vectors are replication-incompetent and contain no detectable wild-type SV40 revertants.