Study of nucleic acid metabolism in two astronauts.

During the last years data have evidenced that alteration in nucleic acid metabolism, expecially increased urinary excretion of modified nucleosides reflects physiological changes in living organism. In relation with the Soyuz-36-Salyut-6-Soyuz-35 mission in 1980 urinary nucleoside excretion of two astronauts /B.F.

Study of the biochemical indicators of chronic irradiation in rats.

Daily urinary excretion of pseudouridine, creatinine and creatine of chronically irradiated Wistar rats was estimated. The irradiation conditions were: 60Co gamma source, dose-rate 10 rad/day, total dose 200, 400 and 600 rad. Control groups were kept under similar conditions.