title: On the nature of free radicals induced by X-rays in puric bases.
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D011687:Purines / Q000528:radiation effects*; D011830:Radiation Effects; D011853:Radiobiology
chemical_list: D005609:Free Radicals; D011687:Purines