[Mating behavior in mutant strains of Drosophila melanogaster at different population densities].

The effects of mutations and genetic background on the mating activity of male and receptivity of female Drosophila melanogaster have been studied at different population densities. Population density, as well as its combinations with other factors, significantly affects mating behavior of D. melanogaster.

[Activity of enzymes of xenobiotics metabolism in peripheral blood lymphocytes in man].

The activity of NADPH-cytochrome c-reductase, benzpyrene hydroxylase, epoxy-hydratase and glutathione-S-transferase in human peripheral blood lymphocytes was studied. In the presence of NADPH, native lymphocytes were unable to reduce cytochrome c. In order to improve the availability of substrates for enzymes, lymphocytes were degraded by single-stage freezing-melting.

[Immunogenicity of Yersinia pestis grown on nutrient media at 28 and 37 degrees C].

The immunogenicity of Y. pestis strain EV, grown in yeast-casein medium, yeast medium with Hottinger digest and yeast medium with sunflower-seed protein at 28 degrees C and 37 degrees C, for guinea pigs and white mice has been studied. As revealed in this study, these media ensure the formation of highly immunogenic populations of Y.