Ecological Systems, Closed

"Ecological Systems, Closed" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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Systems that provide for the maintenance of life in an isolated living chamber through reutilization of the material available, in particular, by means of a cycle wherein exhaled carbon dioxide, urine, and other waste matter are converted chemically or by photosynthesis into oxygen, water, and food. (NASA Thesaurus, 1988)


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This graph shows the total number of publications written about "Ecological Systems, Closed" by people in this website by year, and whether "Ecological Systems, Closed" was a major or minor topic of these publications.
Bar chart showing 3 publications over 3 distinct years, with a maximum of 1 publications in 2004 and 2007 and 2008
To see the data from this visualization as text, click here.
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