title: Circular dichroism of DNA films: reversibility studies.
mesh_terms: D002942:Circular Dichroism / Q000295:instrumentation; D004269:DNA, Bacterial; D004926:Escherichia coli; D008722:Methods; D012964:Sodium; D013057:Spectrum Analysis / Q000295:instrumentation*
chemical_list: D004269:DNA, Bacterial; D012964:Sodium