Gaseous Exchange in a Closed Ecological System

Item

Title
Gaseous Exchange in a Closed Ecological System
Date
1962
Index Abstract
Not Available
Photo Quality
Complete
Report Number
AMRL TDR 62-139
Creator
London, Sheldon A.
West, Arselus
Corporate Author
Aerospace Medical Research Laboratory
Laboratory
Aerospace Medical Research Laboratory
Extent
21
Identifier
AD0402759
Access Rights
OTS
Distribution Classification
1
Contract
Laboratory Research - No Contract
DoD Project
7164
DoD Task
716403
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Cover Price
0.75
Abstract
A series of experiments was performed to deter mine the feasibility of using several types of organisms to maintain a gaseous balance in a closed system. The system consisted of: (a) a photosynthetic unit comprised of cells of Chlorella pyrenoidosa strain TX 71105, (b) a biological aerobic sewage- digesting unit, (c) a unit containing an ammonia-utilizing fungus, Linderina pennispora, and (d) an animal chamber containing a white adult male rat. Although many difficulties were encountered, this bioregenerating unit could be operated under closed conditions for 390 hours. Gas analyses indicated CO2 and O2 levels can be maintained at desirable levels. Material balance within the system was not attempted. However, nitrogen analysis of the resultant fungal mass showed that data on the basic physiology of the organism is required before such a balance can seriously be attempted. The relationship between mission requirements and the level of biological complexity of a closed ecological system was discussed.
Report Availability
Full text available
Date Issued
1962-12
Provenance
RAF Centre of Aviation Medicine
Type
report
Format
1 online resource
Media
AMRLTDR62-139.pdf

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