title: Isolation of subpopulations of lymphocytic cells by the use of isotonically balanced solutions of Ficoll. I. Development of methods and demonstration of the existence of a large but finite number of subpopulations.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D004912:Erythrocytes / Q000276:immunology; D006462:Hemolytic Plaque Technique; D007114:Immunization; D007552:Isotonic Solutions; D008198:Lymph Nodes; D008214:Lymphocytes / Q000254:growth & development*; D008297:Male; D051381:Rats; D012756:Sheep; D013154:Spleen; D013950:Thymus Gland
chemical_list: D007552:Isotonic Solutions