title: Effects of crystalline environment on pyrimidine free-radical formation: barbital crystal polymorphs and sodium barbital.
mesh_terms: D001463:Barbiturates / Q000528:radiation effects*; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D011743:Pyrimidines / Q000528:radiation effects*; D011854:Radiochemistry
chemical_list: D001463:Barbiturates; D005609:Free Radicals; D011743:Pyrimidines