title: Dose-response curves of gamma-irradiated purine and pyrimidine powders.
abstract: E.s.r. spectra have been obtained of gamma-irradiated dry purine and pyrimidine powders. Relative radical yields have been calculated and dose-response curves obtained. Relative recombination rates and recombination rates and formation rates of the radicals have been derived from the dose-response curves. The effect of crystalline structure on the dose-response curves is discussed.
mesh_terms: D004307:Dose-Response Relationship, Radiation; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D005720:Gamma Rays; D011687:Purines / Q000528:radiation effects*; D011743:Pyrimidines / Q000528:radiation effects*; D011839:Radiation, Ionizing
chemical_list: D005609:Free Radicals; D011687:Purines; D011743:Pyrimidines