title: Heavy atoms in model compounds and nucleic acid imaged by dark field transmission electron microscopy.
mesh_terms: D001483:Base Sequence; D001555:Benzene Derivatives; D001565:Benzoates; D003090:Coliphages; D004279:DNA, Viral; D003624:Darkness; D003720:Densitometry; D004602:Elements; D007455:Iodine; D008854:Microscopy, Electron; D009992:Osmium; D010165:Palladium; D010984:Platinum; D011119:Polynucleotides; D013941:Thymine; D014498:Uracil; D014500:Uracil Nucleotides; D014501:Uranium
chemical_list: D001555:Benzene Derivatives; D001565:Benzoates; D004279:DNA, Viral; D004602:Elements; D011119:Polynucleotides; D014500:Uracil Nucleotides; D009992:Osmium; D010984:Platinum; D014501:Uranium; D014498:Uracil; D010165:Palladium; D007455:Iodine; D013941:Thymine