Interaction of physical-chemical and biological regeneration processes in ecological Life Support Systems.

Catalytic combustion of inedible biomass of plants in ecological Life Support Systems (LSS) gives rise to gaseous oxides (CO2, NO2, SO2, etc.). Some of them are toxic for plants suppressing their photosynthesis and productivity.

Long-term experiments on man's stay in biological life-support system.

We describe the experimental system having maximal possible closure of material recycling in an ecosystem, including people and plants, which was carried out in a hermetically sealed experimental complex "BIOS-3", 315 m2 in volume. The system included 2 experimentators and 3 phytotrons with plants (total sowing area of 63 m2). Plants were grown with round-the-clock lamp irradiation with 130 Wm-2 PAR intensity.

[Dynamics of the accumulation and retention of volatile organic substances released by bacteria].

The object of this work was to study the production of volatile biologically active compounds by microorganisms and their accumulation in the medium in the course of several days. The inhibiting action of the accumulated volatile metabolites was found to depend on the time within which the culture was incubated and on the sensitivity of the test organism. The activity of the accumulated metabolites was shown to decrease with the time of storage.

[Composition of a nutrient medium for the continuous cultivation of Thiobacillus ferrooxidans].

Thiobacillus ferrooxidans was found to require the following biogenous elements for constructing its biomass: phosphorus, 14 +/- 2; magnesium, 2 +/- 0.5; potassium, 5 +/- 1; nitrogen, 100 +/- 10 (milligrams per gram of dry biomass). It was shown that the concentrations of biogenous elements in the growth medium, which did not limit the biosynthesis, did not exceed 5 divided by 10 mg per litre for all of the studied elements.