[Modeling the Propagation of Microbial Cells and Phage Particles from the Sites of Permafrost Thawing.].

A method is proposed for integral assessment of the propagation of microbial cells and viral parti- cles during seasonal thawing of relic ice wedge layers. The results of on-site and laboratory investigation car- ried out in the upper part of permafrost exposure at Mamontova Gora (Yakutiya, Russia) are presented. To increase reliability of the results, suspensions of two microbial species and two coliphage species were intro- duced as biomarkers directly on the surface of thaing ice and in the meltwater flow.

[Diversity of bacterial forms in ice wedge of the Mamontova Gora Glacial complex (central Yakutiya)].

Electron microscopic investigation of four samples of ancient ice wedge from the Pleistocene glacial complex of Mamontova Gora (Yakutiya, Russia) revealed high diversity of bacteriomorphic particles. Their structural features included the presence of electron-transparent zones, presumably inclusions containing storage compounds, and microenvironment (capsules or external sheaths). These features may be a result of adaptive strategies providing for microbial survival under permafrost conditions.

[Effects of relic microorganism B. sp. on development, gaseous exchange, spontaneous motor activity, stress resistance and survival of Drosophila melanogaster].

The effect of relic microorganism B. sp., living in severe environment of Siberian permafrost during thousands and millions of years, on development and stress resistance of Drosophila melanogaster has been studied.

[Influence of permafrost microorganisms on the quality and duration of life of laboratory animals].

Microorganisms of genus Bacillus strain 3M (permafrost microorganisms--PM), allocated from the samples of permafrost soils from Mamontova Mountain (Yakutia) are influenced by the quality and duration of life of elderly mice. PMs were injected intraperitoneally to CBA mice at the age of 17 months. Motion activity, muscular force (lifting of cargo test), food instinct activity (dosed starvation test) and cellular immunity activity (reaction of delayed-type hypersensitivity in vivo) of animals have increased, and psychoemotional condition of animals has improved under influence of PM.

[Relict microorganisms of cryolithozone as possible objects of gerontology].

Permafrost is widely distributed in the Northern Hemisphere, and its age reaches hundreds of thousands and millions of years. Permafrost contains alive microorganisms which are not frozen due to relatively high temperature of the environment (-2..