title: An attempt to concentrate ribosomal RNA cistrons in Bacillus subtilis by Millipore filtration.
mesh_terms: D001412:Bacillus subtilis; D002499:Centrifugation, Density Gradient; D004247:DNA / Q000302:isolation & purification*; D005374:Filtration; D006358:Hot Temperature; D008722:Methods; D008967:Molecular Biology; D010759:Phosphorus Isotopes; D012270:Ribosomes; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
chemical_list: D010759:Phosphorus Isotopes; D014316:Tritium; D004247:DNA; D013936:Thymidine