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Threshold Limit Values

"Threshold Limit Values" 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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Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).


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This graph shows the total number of publications written about "Threshold Limit Values" by people in this website by year, and whether "Threshold Limit Values" was a major or minor topic of these publications.
Bar chart showing 2 publications over 2 distinct years, with a maximum of 1 publications in 2008 and 2009
To see the data from this visualization as text, click here.
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