title: An evaluation of the B-V (continuous-flow) and B-IV (density gradient) rotors by use of live polio virus.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D002501:Centrifugation, Zonal; D046508:Culture Techniques; D000882:Haplorhini; D008854:Microscopy, Electron; D017955:Poliovirus / Q000302:isolation & purification*; D014461:Ultracentrifugation