title: Effects of low-dose X-ray irradiation of eggshells on radical production.
abstract: We investigated effects of low-dose X-ray irradiation on eggshells radical production. Eggshells irradiated by low-dose X-ray produced stable radicals. The stable radicals at the central region of the spectrum are the carbonates and CO2(•-) signals. The electron spin resonance (ESR) signals increase with increasing absorbed dose. The estimated radical concentration (spin number) was approximately 3.6 × 10(12) (spins/g) at 10-Gy dose using various known concentrations of TEMPOL (4-hydroxy-2, 2, 6, 6-tretramethylpiperidin-1-oxyl) aqueous solutions. The stable radicals in irradiated eggshells were recognized at the low-level dose (0.10 Gy). In addition, no significant dose rate (0.5-1.5 Gy/min) dependence was found for the radical production.
authors.affiliation: Department of Radiological Life Sciences, Graduate School of Health Sciences, Hirosaki University , Hirosaki , Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nakagawa
mesh_terms: D000818:Animals; D002245:Carbon Dioxide / Q000737:chemistry / Q000378:metabolism*; D002254:Carbonates / Q000378:metabolism*; D003497:Cyclic N-Oxides / Q000378:metabolism / Q000494:pharmacology; D004528:Egg Shell / Q000000981:diagnostic imaging*; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals / Q000528:radiation effects*; D011837:Radiation-Protective Agents / Q000378:metabolism / Q000494:pharmacology; D011859:Radiography; D013113:Spin Labels; D014965:X-Rays / Q000009:adverse effects*
chemical_list: D002254:Carbonates; D003497:Cyclic N-Oxides; D005609:Free Radicals; D011837:Radiation-Protective Agents; D013113:Spin Labels; D002245:Carbon Dioxide; C001803:tempol