title: Letter: E.s.r. of irradiated single crystals of cytosine.
mesh_terms: D003596:Cytosine / Q000528:radiation effects*; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D005615:Freezing; D011830:Radiation Effects
chemical_list: D005609:Free Radicals; D003596:Cytosine