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Radiobiology of ultrasoft X rays. V. Modification of cell inactivation by dimethyl sulfoxide
M R Raju1, M E Schillaci, S G Carpenter
1Los Alamos National Laboratory, New Mexico, 87545, USA.
Radiation Research
|May 1, 1996
Abstract:
The effects of the radioprotector dimethyl sulfoxide (DMSO) were investigated for carbon-K (0.28 keV) and aluminum-K (1.47 keV) X rays compared with 60Co gamma rays for inactivation of mouse C3H 10T1/2 cells. The protection factor for 2 M DMSO was found to be 2.8 for both of the ultrasoft X-ray energies, which is not significantly different from the protection factor of 2.6 found for gamma rays. The results indicate that the proportion of scavengeable lethal damage from gamma and X rays does not depend on the proportion of the total energy that is deposited by low-energy electrons of relatively high ionization density.