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  • Title: Experimental biological life support system. II. Gas exchange between man and microalgae culture in a 30-day experiment.
    Author: Kirensky LV, Terskov IA, Gitelson II, Lisovsky GM, Kovrov BG, Okladnikov YN.
    Journal: Life Sci Space Res; 1968; 6():37-40. PubMed ID: 11982027.
    Abstract:
    The experiments of a prolonged stay by man in a closed atmosphere regenerated by a biological method have been examined. In the course of the experiment, a study of isolated and compatible links of a gas-closed system of "man-microalga" was carried out. The main emphasis was placed on the study of the biological compatibility of the links of the system and primarily of the effect of gaseous metabolites built up in the system of man. The dynamics of a number of physiological parameters of the man under experiment were studied. The regular functional tests of the respiratory and cardiovascular system were carried out. An electrocardiogram was made and respiratory rate and pulse were registered. Oxyhemogram investigations and laboratory clinical examinations were also performed, as well as some psychological tests. It was possible to equalize the respiratory gas ratio by the composition of the cultural environment for algae and by the nutrition ration of man. This eliminates time limit for the life maintenance system, especially on microalga photosynthesis. The results of the experiments permit drawing a conclusion on the biological compatibility of man and microalgae in their prolonged direct gas contact. Thus the possibility of obtaining a balanced atmosphere regeneration system on the basis of counterbalanced gas exchange between man and controlled photosynthesis of algae has been proven experimentally.
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