title: ESR of hydrogen addition radicals in single crystals of 1-methylcytosine and 1-methyluracil.
mesh_terms: D003037:Cobalt Radioisotopes; D003596:Cytosine / Q000031:analogs & derivatives* / Q000528:radiation effects; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D005720:Gamma Rays; D011830:Radiation Effects; D014498:Uracil / Q000031:analogs & derivatives* / Q000528:radiation effects
chemical_list: D003037:Cobalt Radioisotopes; D005609:Free Radicals; D014498:Uracil; D003596:Cytosine