[Lipid peroxidation and antioxidative system in imitation diving].

Plasma lipid oxidation (LPO) and antioxidative system were examined in test divers who made imitation diving in the pressure chamber to the depth of 250 meters. Imitation diving showed higher iron levels, followed by a rise in the concentration of primary LPO products. There were no increases in the levels of secondary LPO products probably due to the fact that the ceruloplasmin-transferrin system released active iron from the reaction and that peroxy radicals were inactivated by SH groups.

[The characteristics of the extreme actions on the bodies of deep-sea divers during saturation dives and the basic task of medical support for these descents].

A novel dive method, namely, saturation diving is presented. Extreme factors affecting the deep divers during such saturation dives are listed. The physiologic parameters of early adaptation, stable adaptation, early disadaptation and readaptation periods of a man during prolonged staying in a hyperbaric artificial gaseous environment are evaluated.

[Polyploidization of rat hepatocytes due to cell fusion caused by radiations of different LET].

The method of flow cytometry was used to study polyploidization of hepatocytes following X-, gamma-, and neutron-irradiation. Ionizing radiation was shown to induce cell polyploidization by two different ways: (1) cells and nuclei fusion, and (2) restriction of mitosis after DNA replication. RBE of 14 MeV neutrons with respect to fusion was about 5.