title: DNA microdensitometry as a measure of cycling-non-cycling activity in aged human diploid cells in culture.
mesh_terms: D000375:Aging; D002470:Cell Survival; D002478:Cells, Cultured; D004247:DNA / Q000032:analysis*; D003720:Densitometry; D005347:Fibroblasts / Q000032:analysis / Q000502:physiology; D006801:Humans; D008168:Lung / Q000166:cytology* / Q000196:embryology; D008832:Microchemistry; D008855:Microscopy, Electron, Scanning; D013194:Staining and Labeling
chemical_list: D004247:DNA