title: E.S.R. spectra of free radicals induced in nucleic acid purine and pyrimidine bases and selected analogues by exposure to hydrogen atoms.
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D006859:Hydrogen; D009696:Nucleic Acids / Q000528:radiation effects*; D011687:Purines / Q000528:radiation effects; D011743:Pyrimidines / Q000528:radiation effects; D011830:Radiation Effects; D011854:Radiochemistry
chemical_list: D005609:Free Radicals; D009696:Nucleic Acids; D011687:Purines; D011743:Pyrimidines; D006859:Hydrogen