[Degree of polymerization of rat cerebral hemisphere and testicular DNP-complex during hyperoxia and following it]

The concentration-related viscosity (formula: see text) of DNP-solutions in 4.0 M urea, 0.0005 M tris-buffer (pH 7.5) isolated from cell nuclei of cerebral hemispheres and testicles was determined for mongrel and Wistar rats of 5 groups: I -- normal, II -- after the action of 6 gauge atmospheres of pure oxygen before convulsions beginning, III -- 1 hour, IV -- 4 hours, V -- 12 hours after decompression. It was noted that the concentration-related viscosity of these DNP was equal both for mongrel and inbred rats. No differences in the polymerity degree of brain DNP were detected in all groups of animals under study. The viscosity of testicular DNP was found to decrease by 13.3% 1 hour and 10.3% 4 hours after decompression, whereas 12 hours after it does not differ from the control. Differences in the resistance degree of the brain and testicular DNP to the action of hyperoxia may depend on the cell division rates in these tissues.