Results 261 to 270 of about 12,410,794 (299)
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Population dynamics of an algal–bacterial cenosis in closed ecological system
Advances in Space Research, 2005The paper deals with microalgae-bacteria interrelationships in the "autotroph-heterotroph" aquatic biotic cycle. Explanations of why and how algal-bacterial ecosystems are formed still remain controversial. The paper presents results of experimental and theoretical investigations of the functioning of the algal-bacterial cenosis (the microalga ...
T I, Pisman +2 more
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Experimental Study of Nitrogen Fixation System in a Closed Ecological System
SAE Technical Paper Series, 1994<div class="htmlview paragraph">Nitrogen Fixation Systems(NFS) suitable for plant cultivation in a closed environment have been studied through experimental verification. The system is composed of physico-chemical processes only. Nitrogen gas and water are fed into the system as raw materials,and ammonia and ammonium nitrate solution are produced
Masatoshi Tsuji +5 more
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Biosphere II: Engineering of Manned, Closed Ecological Systems
Journal of Aerospace Engineering, 1991Space Biospheres and Ventures, a private, for-profit firm, has undertaken a major research and development project in the study of biospheres, with the objective of creating and producing biospheres. Biosphere II-scheduled for completion in March 1991-will be essentially isolated from the existing biosphere by a closed structure, composed of components
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Computer modeling of the biotic cycle formation in a closed ecological system
Advances in Space Research, 2001The process of biotic turnover in a closed ecological system (CES) with an external energy flow was analyzed by mathematical modeling of the biotic cycle formation. The formation of hierarchical structure in model CESs is governed by energy criteria.
A V, Brilkov +3 more
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Eucaryote/Procaryote Ratio as an Indicator of Stability for Closed Ecological Systems
BioSystems, 1983The eukaryote/prokaryote ratio permits immediate and direct estimation of ecological stability in closed microbial ecosystems as well as in natural systems. Previous research demonstrated partial pressure of oxygen can be used as a long term indicator of stability (Kearns and Folsome , 1981).
D C, Obenhuber, C E, Folsome
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Closed Ecological Systems, Space Life Support and Biospherics
2010This chapter explores the development of a new type of scientific tool – man-made closed ecological systems. These systems have had a number of applications within the past 50 years. They are unique tools for investigating fundamental processes and interactions of ecosystems.
Mark Nelson +4 more
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Opportunities and constraints of closed man-made ecological systems on the moon
Advances in Space Research, 1994Abstract Most scenarios for a manned lunar base include a combination of physical-chemical and bioregenerative life support systems. Especially on the lunar surface, however, there is a series of special environmental factors which seriously affect the organisms suitable for food production and biological regeneration of the habitat atmosphere and ...
V. Blüm +3 more
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Formation of higher plant component microbial community in closed ecological system
Acta Astronautica, 2001Closed ecological systems (CES) place at the disposal of a researcher unique possibilities to study the role of microbial communities in individual components and of the entire system. The microbial community of the higher plant component has been found to form depending on specific conditions of the closed ecosystem: length of time the solution is ...
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Man as a component of a closed ecological life support system
Life support & biosphere science : international journal of earth space, 1996Material support of all manned space flights so far has been provided from a prestored stock of substances or replenished from the Earth's biosphere. Exploration of space will, however, become real only when man is able to break away from Earth completely, when he will be accompanied by a system providing everything necessary to sustain full-valued ...
J I, Gitelson, , Okladnikov YuN
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The emerging field of closed ecological systems
Journal of Biogeography, 2005John P. Allen, Mark Nelson
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