Contrails
The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Gaseous Exchange in a Closed Ecological System

Report Number: AMRL TDR 62-139
Author: London, Sheldon A.
Author: West, Arselus
Corporate Author: Aerospace Medical Research Laboratory
Laboratory: Aerospace Medical Research Laboratory
Date of Publication: 1962-12
Pages: 21
Contract: Laboratory Research - No Contract
Project: 7164
Task: 716403
AD Number: AD0402759

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.


Provenance:
RAF Centre of Aviation Medicine
Download this report

(PDF, 0.77 MB, 21 pages)

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a full-image download of the report, exists at DTIC

Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
The inside cover of this report indicates that it was released for public sale
The original price to the public, according to the cover, was 0.75