[A laboratory model of the cyanobacterial mat from the Kotel'nikovskii hot spring (Baikal Region)].

A laboratory model of the cyanobacterial community of the Kotel'nikovskii hot spring (Baikal Region) was developed. A step-by-step description of the algocenosis formation along both the time and temperature gradient was given. The natural and laboratory mats were compared, and the major differences in the qualitative and quantitative composition of the cyanobacterial community were revealed.

[Biogeochemical processes in the algal-bacterial mats of the Urinskii alkaline hot spring].

The structure and production characteristics of microbial communities from the Urinskii alkaline hot spring (Buryat Republic, Russia) have been investigated. A distinctive characteristic of this hot spring is the lack of sulfide in the issuing water. The water temperature near the spring vents ranged from 69 to 38.

[Complications high frequency catheter destruction of heart conduction pathways].

An analysis of 490 operations in 442 patients with different variants of supraventricular and ventricular tachycardia was made. Complications developed in 23 cases (4.7%).