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[Biological life support systems for man].

This paper discusses theoretical foundations of biological life support systems (BLSS), major stages of their development and performance parameters of BLSS models developed by the Institute of Biomedical Problems during the past 25 years. Comparison of the size and structure of these models with the structure of natural ecosystems allows the conclusion that BLSS can be operational in an environment that does not differ drastically from natural biocenoses in terms of living matter and basic ingredients, i.e. oxygen, carbon dioxide, water.