[The concentration of methane and trace organic admixtures in the air expired by submariners during a dive simulation in a hyperbaric chamber]. / Kontsentratsiia metana i nekotorykh organicheskikh mikroprimesei v vydykhaemom vozdukhe vodolazov pri imitatsii pogruzheniia v giperbaricheskoi kamere.

The article describes the procedure of determining methane and some organic trace elements in expired air during simulated "dive" in a hyperbaric chamber. Partial pressures of methane breathed out by divers in 29 experiments are reported. Concentrations of 8 trace organic components have been measured in the expired air of two divers. The results obtained show that expired methane increases by 3-10 times during simulated descent down to 80-115 m.

[An experimental study on the effects of high pressure on adsorption properties of silochrome C-120]. / Eksperimental'noe izuchenie vliianiia povyshennogo davleniia na adsorbtsionnye svoistva silokhroma C-120.

Adsorption properties of silochrome in a helium atmosphere at 77 as were investigated. It was demonstrated that at a high pressure adsorption properties of silochrome changed and Henry coefficients decreased.

[Analysis of the trace contaminants in the atmosphere formed by the life-support environment of the closed system of man-higher plants-lower plants-microorganisms]. / Analiz mikroprimesei v atmosfere, formiruemoi sredoi obitaniia zamknutoi sistemy chelovek-vysshie rasteniia-nizshie rasteniia-mikroorganizmy.

Trace contaminants in the air of a biological life support system which was continuously complicated were examined. Air samples were taken by cooled traps and analyzed by gas chromatography. Changes in the air of the biological life support system as a function of its structure were compared using Hamming distance and composition similarity measures. Matrices of the measures were obtained and a graph whose structure corresponded to changes in the biological life support system was constructed. During prolonged experiments trace contaminants remained relatively stable and changed when a mineralization component was attached. It is concluded that the composition and variations in the organic components of the atmosphere can be used as an integral indicator of the function of the biological life support system as a whole.