title: Density gradient relaxation: a method for preparative buoyant density separation of DNA.
mesh_terms: D000643:Ammonium Chloride / Q000378:metabolism; D002498:Centrifugation; D002499:Centrifugation, Density Gradient; D002623:Chemistry Techniques, Analytical; D003090:Coliphages; D004247:DNA / Q000302:isolation & purification; D004269:DNA, Bacterial / Q000096:biosynthesis; D004279:DNA, Viral; D003720:Densitometry; D004926:Escherichia coli / Q000378:metabolism; D008722:Methods; D008837:Micrococcus; D009584:Nitrogen; D011868:Radioisotopes
chemical_list: D004269:DNA, Bacterial; D004279:DNA, Viral; D011868:Radioisotopes; D000643:Ammonium Chloride; D004247:DNA; D009584:Nitrogen