[Nuclear spin catalysis in nanoreactors of living cells].

There is a great variety of chemical elements with magnetic and nonmagnetic isotopes in living cells. The question arises as to whether living cells can perceive the difference between magnetic and non-magnetic isotopes of chemical elements. It has been shown that bacteria Escherichia coli, which were previously enriched with the magnetic isotope of magnesium, 25Mg, essentially faster adapt to the new growth media in comparison with the cells, which were enriched with the nonmagnetic isotopes, 24Mg or 26Mg.

[Reliability of electron-transport membranes and the role of oxygen anion-radicals in aging: stochastic modulation of the genetic program].

All biomolecular constructions and nanorecators are designed to perform preset functions. All of them operate with limited reliability, namely, for each and every device or bionanoreactor normal operation alternates with accidental malfunctions (failures). Timely preventive maintenance replacement (prophylaxis) of functional elements in cells and tissues, the so-called turnover, is the main line of assuring high system reliability of organism as a whole.

[The radioecological problem of radon].

Radon and its daughter decay products are the main part of natural radiation background. The review presents the information on indoor radon radiation level, radon sources, exposure doses and effects on human health. In addition to radioecological aspects, the radon effects should be considered as the important problem of low-dose radiation biology.

[The modelling of survival and mortality curves for human populations based on the theory of reliability].

The reliability theory model of aging (Kol'tover 1981, 1982) was used for analysis of life-tables of Swedish males and females for 1951-1955, 1962-1973 and 1971-1975 calendar years. In terms of the model it has been possible 1) to explain the Gompertz "law" of mortality; 2) to describe quantitatively statistical life-table data including Gompertz's and geriatric ages; 3) to predict the behavior of mortality rate function depending on the extent of population heterogeneity, among them the existence, at respective degrees of heterogeneity, of a maximum in geriatric age range and 4) to estimate the species-specific maximum life-span potential of animals.

[Interconnection between activity and conformational mobility of alpha-chymotrypsin in reverse micelle systems].

A comparative study of the catalytic activity of alpha-chymotrypsin and the spin label rotation frequency in the alpha-chymotrypsin active center of reverse micellar systems solvated by H2O-organic mixtures was carried out. It was found that the decrease in the label rotation frequency resulting from the substitution of water in the micellar inner cavity by glycerol, 2.3-butanediol and dimethylsulfoxide (up to 95%) caused a marked increase (20-fold in the case of 2.