title: Physical markers of change in a virion population during passage.
mesh_terms: D000818:Animals; D002417:Cattle; D002501:Centrifugation, Zonal; D002642:Chick Embryo; D046508:Culture Techniques; D005321:Extraembryonic Membranes; D007739:L Cells; D008196:Lymph; D008297:Male; D051379:Mice; D008854:Microscopy, Electron; D011817:Rabbits; D012900:Smallpox Vaccine / Q000592:standards*; D013395:Sucrose; D013737:Testis; D014613:Vaccines, Attenuated / Q000592:standards; D014616:Vaccinia virus / Q000254:growth & development; D010948:Viral Plaque Assay; D014776:Virus Cultivation
chemical_list: D012900:Smallpox Vaccine; D014613:Vaccines, Attenuated; D013395:Sucrose