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The objective of the present study was to develop the criteria for forensic-medical diagnostics of an electrical injury inflicted in the aqueous environment based on the characteristics of the electrical mark. The specific morphological features of the electrical injuries inflicted in the aqueous environment that were discovered in the materials available for the forensic medical expertise were analysed taking into consideration the results of the relevant research reported in the forensic medical literature. It was shown that an electrical injury inflicted in the aqueous environment results in the formation of an unusual mark in the form of blisters containing no watery liquid associated with electrogenic oedema in the surrounding tissues. Macroscopic and microscopic studies of the electrical mark failed to reveal the signs of grade III and IV grade thermal burning or thermally affected hair. It is concluded that the consistent characteristics of the electrical mark resulting from the injury inflicted by technical electricity in the aqueous environment include cell lengthening, blister formation inside the corneal layer, and the separation of epidermis from the skin proper.

The results of complex toxicological and hygienic study showed that the quality of pipe water filtered through the activated carbonic fibrous material (ACFM) "Dnepr-F" forming a part of absorptive filtering element improved markedly. The content of organic substances decreased drastically as well as that of nitrates and iron. Microbiological indices did not suffer appreciable changes and were within permissible limits. The water filtered through the absorptive element with ACFM had no adverse influence on the organisms of warm-blooded animals. Proceeding from foregoing one can conclude that the "Dnepr-F" may be recommended as a part of absorptive filtering element for the final refinement of drinking water.

Rubber D-51A under examination, treated by thiuram, following long-time contact with drinking water (static conditions of the experiment) discharges thiuram into it, which significantly worsens the water quality. Drinking of this water by animals leads to functional disturbances in their organisms. Short-time contact of rubber D-51A with drinking water does not cause deterioration of its quality. Therefore rubber D-51A can be recommended to be used as pump gaskets.

Disturbance and normalization of nucleic acid metabolism in rat thymus was studied after the effect of tritium oxide delivered in similar cumulative doses but at different dose rates. Both the disturbance and normalization were shown to be a function of dose rate, the slightest damage and the complete recovery being registered at the lowest dose rate (the amount of tritium oxide administered being 0.37 MBq/g/day). The rate of restoration was also a function of dose rate; with tritium oxide dose of 1.85 MBq/g/day (the dose rate at the stage of the equilibrium tritium content in the aqueous phase being 0.38 Gy/day) it was 9 times as high as that after a dose of 0.37 MBq/g/day (0.11 Gy/day dose rate).