Results 181 to 190 of about 1,001,571 (236)

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, Toru Numaguchi, Shigeo Iiyama, Katsutoshi Kikuchi, Keiji Nitta, Akira Ashida   +5 more
openaire   +1 more source

Population dynamics of an algal–bacterial cenosis in closed ecological system

Advances in Space Research, 2005
The 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, Ya V, Galayda, N S, Loginova   +2 more
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Safe and Ecological Refluxing with a Closed‐Loop Air Cooling System

ChemSusChem, 2016
AbstractOff‐the‐shelf computer cooling hardware was used to construct a closed‐loop air cooling system (CLACS) that is distinguished by scalability, low energy, and no tap water consumption. Constructed to be generally used with laboratory condensers, the system was tested with several common low and high boiling solvents and showed a condensation ...
Stefan Böhmdorfer, Gottfried Eilenberger, Thomas Zweckmair, Ivan Sumerskii, Antje Potthast, Thomas Rosenau   +5 more
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Initial experimental results from the laboratory biosphere closed ecological system facility

Advances in Space Research, 2003
An initial experiment in the Laboratory Biosphere facility, Santa Fe, New Mexico, was conducted May-August 2002 using a soil-based system with light levels (at 12 h per day) of 58-mol m-2 d-1. The crop tested was soybean, cultivar Hoyt, which produced an aboveground biomass of 2510 grams. Dynamics of a number of trace gases showed that methane, nitrous
M, Nelson, W F, Dempster, A, Alling, J P, Allen, R, Rasmussen, S, Silverstone, M, Van Thillo   +6 more
openaire   +2 more sources

Closed Ecological Recirculating Aquaculture Systems

2017
Closed habitation experiments are essential for global environment improvement and maintenance of self-sustaining ecosystems. Hydro-ecosystems, which utilize aquatic organisms, are a promising prospect in habitation experiments. The utilization of aquatic organisms in closed systems can essentially be divided into three parts: (1) cultivation of ...
openaire   +1 more source

Computer modeling of the biotic cycle formation in a closed ecological system

Advances in Space Research, 2001
The 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, V V, Ganusov, E V, Morozova, N S, Pechurkin   +3 more
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Formation of higher plant component microbial community in closed ecological system

Acta Astronautica, 2001
Closed 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 ...
openaire   +2 more sources

Incorporating fast and intelligent control technique into ecology: A Chebyshev neural network-based terminal sliding mode approach for fractional chaotic ecological systems

, 2021
Bo Wang, H. Jahanshahi, H. Dutta, E. Zambrano-Serrano, V. Grebenyuk, Stelios D. Bekiros, A. Aly   +6 more
semanticscholar   +1 more source

BIOSPHERE II: Technical Overview of a Manned Closed Ecological System

SAE Technical Paper Series, 1989
<div class="htmlview paragraph">This paper reports engineering updates on the temperature and humidity control, water cycling, energy, ocean and marsh ecosystems, redundancies in energy systems, variable volume chambers, and computer monitoring and control systems for the Biosphere II project under construction at present and scheduled for ...
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Mineral recovery system for a Closed Ecology Experiment Facility (CEEF).

Life support & biosphere science : international journal of earth space, 1999
A unique recovery system, which consists of electrodialysis (ED) and crystallization processes, is proposed for NaCl (salt) from waste water after oxidation of urine. NaCl recovery characteristics from the oxidized urine, which contains KCl and NO3- impurities, were experimentally evaluated.
H, Kurokawa, K, Funabashi, M, Oda, S, Sugawara, A, Ashida, K, Nitta   +5 more
openaire   +1 more source