The search for life on Mars - Viking 1976 gas changes as indicators of biological activity
The objective of the gas exchange experiment (GEX) in the Viking lander biology instrument package is to determine whether life exists in a 1-cc Martian soil sample delivered to it. The GEX is capable of maximum flexibility while protecting the indigenous organisms from exposure to physiologically i...
Main Authors: | , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1976
|
Subjects: | |
Online Access: | http://ntrs.nasa.gov/search.jsp?R=19770035047 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19770035047 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19770035047 2023-05-15T13:38:12+02:00 The search for life on Mars - Viking 1976 gas changes as indicators of biological activity Oyama, V. I. Berdahl, B. J. Carle, G. C. Lehwalt, M. E. Ginoza, H. S. Unclassified, Unlimited, Publicly available Aug 1, 1976 http://ntrs.nasa.gov/search.jsp?R=19770035047 unknown http://ntrs.nasa.gov/search.jsp?R=19770035047 Accession ID: 77A17899 Copyright Other Sources 55 Origins of Life; 7; Aug. 197 1976 ftnasantrs 2012-02-15T13:02:52Z The objective of the gas exchange experiment (GEX) in the Viking lander biology instrument package is to determine whether life exists in a 1-cc Martian soil sample delivered to it. The GEX is capable of maximum flexibility while protecting the indigenous organisms from exposure to physiologically incompatible medium. The discussion covers the biological premises implemented in the GEX, the requirements for the GEX M4 medium, the operational aspects of the incubation chamber, nonbiological and biological changes, and Antarctica soil experiment. Sources of biological gas changes are examined along with ways of differentiating biological gas changes from nonbiological ones. From cold incubation of low-frequency soils, it is concluded that decisive negative tests of GEX may require extended incubations beyond the nominal mission plan of 60 days, barring any outright information that negates the presence of life on Mars. Other/Unknown Material Antarc* Antarctica NASA Technical Reports Server (NTRS) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
55 |
spellingShingle |
55 Oyama, V. I. Berdahl, B. J. Carle, G. C. Lehwalt, M. E. Ginoza, H. S. The search for life on Mars - Viking 1976 gas changes as indicators of biological activity |
topic_facet |
55 |
description |
The objective of the gas exchange experiment (GEX) in the Viking lander biology instrument package is to determine whether life exists in a 1-cc Martian soil sample delivered to it. The GEX is capable of maximum flexibility while protecting the indigenous organisms from exposure to physiologically incompatible medium. The discussion covers the biological premises implemented in the GEX, the requirements for the GEX M4 medium, the operational aspects of the incubation chamber, nonbiological and biological changes, and Antarctica soil experiment. Sources of biological gas changes are examined along with ways of differentiating biological gas changes from nonbiological ones. From cold incubation of low-frequency soils, it is concluded that decisive negative tests of GEX may require extended incubations beyond the nominal mission plan of 60 days, barring any outright information that negates the presence of life on Mars. |
format |
Other/Unknown Material |
author |
Oyama, V. I. Berdahl, B. J. Carle, G. C. Lehwalt, M. E. Ginoza, H. S. |
author_facet |
Oyama, V. I. Berdahl, B. J. Carle, G. C. Lehwalt, M. E. Ginoza, H. S. |
author_sort |
Oyama, V. I. |
title |
The search for life on Mars - Viking 1976 gas changes as indicators of biological activity |
title_short |
The search for life on Mars - Viking 1976 gas changes as indicators of biological activity |
title_full |
The search for life on Mars - Viking 1976 gas changes as indicators of biological activity |
title_fullStr |
The search for life on Mars - Viking 1976 gas changes as indicators of biological activity |
title_full_unstemmed |
The search for life on Mars - Viking 1976 gas changes as indicators of biological activity |
title_sort |
search for life on mars - viking 1976 gas changes as indicators of biological activity |
publishDate |
1976 |
url |
http://ntrs.nasa.gov/search.jsp?R=19770035047 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19770035047 Accession ID: 77A17899 |
op_rights |
Copyright |
_version_ |
1766102555506507776 |