Electron density fluctuations in collisional dusty plasma with variable grain charge.

The kinetic theory of electric fluctuations in a collisional weakly ionized dusty plasma is formulated with due regard to the grain charging dynamics. The correlation functions of electron and ion density are obtained by considering their collisions with neutrals described within the Bhatnagar-Gross-Krook model. The electron density correlation spectra in isothermal and nonisothermal plasma are calculated for various values of grain density, grain size, and ion collisionality.

[The assessment of biocenosis contamination in the region of radioactive waste storage (RWS) placing and influence of this storage on rodents].

The results of radiative and of chemical monitoring show definite contamination of this zone by 90Sr and toxic metals. The essential local contaminations of geosystems (up to 2.3 x 10(4) Bk/kg of soil) require in environmental condition assessment at biocenosis level.

Toxic aluminium and heavy metals in groundwater of middle Russia: health risk assessment.

Two approaches are distinguished in modern ecological monitoring. The first one is physicochemical analysis of environmental objects with respect to maximum allowable concentrations (MACs) of chemical substances, which is performed by standards methods in accordance with state regulations. The second approach (biological monitoring) is based on the methodology of biotesting and bio indication.

[Molecular-epidemiological characteristics of basic foci of the HIV epidemic among substance abusers in Russia].

A serological test has been developed, allowing a rapid and reliable differentiation between envA and envB genotypes in the sera from HIV-1-infected IDUs and their sexual partners. We analyzed 556 specimens from HIV-1-seropositive IDUs and their sexual partners. The sera were collected in five regions of Russia with the greatest number of HIV-1-infected IDUs.