title: The use of ultrafiltration for the preparation of a cell growth factor.
mesh_terms: D000818:Animals; D001798:Blood Proteins / Q000032:analysis / Q000302:isolation & purification*; D002356:Cartilage / Q000166:cytology; D002417:Cattle; D002478:Cells, Cultured; D003470:Culture Media; D005374:Filtration; D005612:Freeze Drying; D006133:Growth Substances / Q000302:isolation & purification*; D046911:Macromolecular Substances; D008567:Membranes, Artificial; D008722:Methods; D008851:Micropore Filters; D008970:Molecular Weight; D011817:Rabbits
chemical_list: D001798:Blood Proteins; D003470:Culture Media; D006133:Growth Substances; D046911:Macromolecular Substances; D008567:Membranes, Artificial