title: The isonicotinyl hydrazones of Escherichia coli ribosomal ribonucleic acids.
mesh_terms: D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D002501:Centrifugation, Zonal; D004926:Escherichia coli / Q000032:analysis*; D007539:Isonicotinic Acids; D010084:Oxidation-Reduction; D012329:RNA, Bacterial / Q000032:analysis*; D012270:Ribosomes / Q000032:analysis*; D013053:Spectrophotometry
chemical_list: D002247:Carbon Isotopes; D007539:Isonicotinic Acids; D012329:RNA, Bacterial