Estimation of the absorbed dose in radiation-processed food--1. Test of the EPR response function by a linear regression analysis.
Free radicals produced in chicken bone tissue by 137Cs gamma-rays were measured using electron paramagnetic resonance spectroscopy. The yield of radicals was found to be proportional to the absorbed dose. Additive re-irradiation of previously irradiated bones is the basis of a method to estimate the absorbed dose in radiation-processed foods. The ability of the method to provide accurate dose assessments for a range of doses (0.5-7.4 kGy) is tested here. A linear fit to the data yields reasonable dose estimates for bone irradiated less than 2 kGy, but fails at the higher doses using a linear approximation to the dose response. These data and their implications are discussed.
Desrosiers
M F
MF
Center for Radiation Research, National Institute for Standards and Technology, Gaithersburg, MD 20899.
Wilson
G L
GL
Hunter
C R
CR
Hutton
D R
DR
D000818:Animals; D001842:Bone and Bones / Q000528:radiation effects; D002645:Chickens; D004578:Electron Spin Resonance Spectroscopy; D005514:Food Irradiation; D005609:Free Radicals; D011829:Radiation Dosage; D012044:Regression Analysis
D005609:Free Radicals