Guidelines for Metals and Metalloids in Ambient ... - ARCHIVE: Defra
Guidelines for Metals and Metalloids in Ambient ... - ARCHIVE: Defra
Guidelines for Metals and Metalloids in Ambient ... - ARCHIVE: Defra
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Glossary<br />
Threshold Limit<br />
Values (TLVs)<br />
Toxicological<br />
Toxicok<strong>in</strong>etics<br />
Transferr<strong>in</strong><br />
Vasospastic symptoms<br />
These values are established by the American<br />
Conference of Governmental Industrial<br />
Hygienists (ACGIH). They are the concentration<br />
<strong>in</strong> air of a substance to which, it is believed that,<br />
most workers can be exposed daily without<br />
adverse effect. Quoted as time weighted<br />
concentrations <strong>for</strong> a seven or eight hour workday<br />
<strong>and</strong> a 40 hour work<strong>in</strong>g week. For most substances<br />
the value may be exceeded, to a certa<strong>in</strong> extent,<br />
provided there are compensat<strong>in</strong>g periods of<br />
exposure below the value dur<strong>in</strong>g the workday or,<br />
<strong>in</strong> some cases, work<strong>in</strong>g week. A limited number of<br />
substances are given ceil<strong>in</strong>g concentrations that<br />
should never be exceeded.<br />
Relat<strong>in</strong>g to toxicology, ie, the nature <strong>and</strong> effects<br />
of poisons.<br />
Application of pharmacok<strong>in</strong>etics to determ<strong>in</strong>e the<br />
relationship between the systemic exposure of a<br />
compound <strong>in</strong> experimental animals <strong>and</strong> its<br />
toxicity. It is used primarily <strong>for</strong> establish<strong>in</strong>g<br />
relationships between exposures <strong>in</strong> toxicology<br />
experiments <strong>in</strong> animals <strong>and</strong> the correspond<strong>in</strong>g<br />
exposures <strong>in</strong> humans.<br />
Any of several beta globul<strong>in</strong>s found <strong>in</strong> blood<br />
serum which b<strong>in</strong>d <strong>and</strong> transport iron.<br />
Sudden constriction of a blood vessel, result<strong>in</strong>g <strong>in</strong><br />
reduced flow.<br />
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