[Biological and physico-chemical properties of Yersinia pseudotuberculosis bacterial culture having the fra-operon Yersinia pestis].

The biological and physico-chemical properties of cultures of two isogenous recombinant variants of Yersinia pseudotuberculosis were studied. The cell genomes of the cultures are distinguished from one another only by the presence or by the absence of the fra-operon, which is a determined attribute of the plague microbe capsule-forming process. The expression of the attribute is amplified by rising the microbial biomass cultivation temperature and stimulates the decrease in the viability of the bacteria and adaptation potential in vitro.

[Intensification of microbial degradation of crude oil and oil products in the presence of perfluorodecalin].

The possibility of using perfluorinated organic compounds for growing microorganisms and degrading xenobiotics has been demonstrated for the first time with perfluorodecalin (PFD), a gas-transporting component of the blood substitute Perftoran. In particular, this is promising for intensifying microbial degradation of oil and oil products and production of biodegrader biomass in synthetic mineral media. Addition of PFD to a mineral medium with crude oil and masut increased 4.

[The distribution of chromosome aberrations in cells under the action of radiation of different qualities].

The distribution of chromosome aberrations in the cultured human peripheral blood lymphocytes exposed to 6 MeV neutrons was compared with that of lymphocytes exposed to gamma-rays. The regularities of both distributions were similar.

[The cytogenetic effects of 137Cs gamma quanta].

The data on the human chromosomal level have been first obtained showing that the values of relative biological effectiveness of the 137Cs radionuclide exceed 1. These findings were allowed for during intracavitary radiotherapy in more than 50 patients with uterine body cancer.