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	<id>http://icrpaedia.org/index.php?action=history&amp;feed=atom&amp;title=Activity_median_thermodynamic_diameter</id>
	<title>Activity median thermodynamic diameter - Revision history</title>
	<link rel="self" type="application/atom+xml" href="http://icrpaedia.org/index.php?action=history&amp;feed=atom&amp;title=Activity_median_thermodynamic_diameter"/>
	<link rel="alternate" type="text/html" href="http://icrpaedia.org/index.php?title=Activity_median_thermodynamic_diameter&amp;action=history"/>
	<updated>2026-05-01T15:47:47Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.32.0</generator>
	<entry>
		<id>http://icrpaedia.org/index.php?title=Activity_median_thermodynamic_diameter&amp;diff=3174&amp;oldid=prev</id>
		<title>Chris Clement at 17:41, 18 August 2021</title>
		<link rel="alternate" type="text/html" href="http://icrpaedia.org/index.php?title=Activity_median_thermodynamic_diameter&amp;diff=3174&amp;oldid=prev"/>
		<updated>2021-08-18T17:41:51Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #222; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #222; text-align: center;&quot;&gt;Revision as of 17:41, 18 August 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;A value of aerodynamic diameter such that 50% of the activity in the aerosol is associated with particles of thermodynamic diameter (&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;dth&lt;/del&gt;) greater than the AMTD. The AMTD is used when deposition depends principally on diffusion, typically when the AMAD is less than about 0.3 μm. (Adapted from [[ICRP Publication 130]], 2015)&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;A value of aerodynamic diameter such that 50% of the activity in the aerosol is associated with particles of &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[&lt;/ins&gt;thermodynamic diameter&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;]] &lt;/ins&gt;(&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;d&amp;lt;sub&amp;gt;th&amp;lt;/sub&amp;gt;&lt;/ins&gt;) greater than the AMTD. The AMTD is used when deposition depends principally on diffusion, typically when the AMAD is less than about 0.3 μm. (Adapted from [[ICRP Publication 130]], 2015)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;''ICRP Glossary entry -  May 2019''&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;''ICRP Glossary entry -  May 2019''&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Chris Clement</name></author>
		
	</entry>
	<entry>
		<id>http://icrpaedia.org/index.php?title=Activity_median_thermodynamic_diameter&amp;diff=1996&amp;oldid=prev</id>
		<title>Karen Clement at 17:27, 12 September 2019</title>
		<link rel="alternate" type="text/html" href="http://icrpaedia.org/index.php?title=Activity_median_thermodynamic_diameter&amp;diff=1996&amp;oldid=prev"/>
		<updated>2019-09-12T17:27:09Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #222; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #222; text-align: center;&quot;&gt;Revision as of 17:27, 12 September 2019&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;A value of aerodynamic diameter such that 50% of the activity in the aerosol is associated with particles of thermodynamic diameter (dth) greater than the AMTD. The AMTD is used when deposition depends principally on diffusion, typically when the AMAD is less than about 0.3 μm. (Adapted from [[ICRP Publication 130]], 2015)&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;A value of aerodynamic diameter such that 50% of the activity in the aerosol is associated with particles of thermodynamic diameter (dth) greater than the AMTD. The AMTD is used when deposition depends principally on diffusion, typically when the AMAD is less than about 0.3 μm. (Adapted from [[ICRP Publication 130]], 2015)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;''ICRP Glossary entry -  May 2019''&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;''[[ICRP Glossary]] &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;entry -  May 2019&lt;/del&gt;''&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;''&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;'Return to &lt;/ins&gt;[[ICRP &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Glossary|&lt;/ins&gt;Glossary]]&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;'&lt;/ins&gt;''&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Karen Clement</name></author>
		
	</entry>
	<entry>
		<id>http://icrpaedia.org/index.php?title=Activity_median_thermodynamic_diameter&amp;diff=1198&amp;oldid=prev</id>
		<title>Intern: Created page with &quot;A value of aerodynamic diameter such that 50% of the activity in the aerosol is associated with particles of thermodynamic diameter (dth) greater than the AMTD. The AMTD is us...&quot;</title>
		<link rel="alternate" type="text/html" href="http://icrpaedia.org/index.php?title=Activity_median_thermodynamic_diameter&amp;diff=1198&amp;oldid=prev"/>
		<updated>2019-06-06T17:44:54Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;A value of aerodynamic diameter such that 50% of the activity in the aerosol is associated with particles of thermodynamic diameter (dth) greater than the AMTD. The AMTD is us...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;A value of aerodynamic diameter such that 50% of the activity in the aerosol is associated with particles of thermodynamic diameter (dth) greater than the AMTD. The AMTD is used when deposition depends principally on diffusion, typically when the AMAD is less than about 0.3 μm. (Adapted from [[ICRP Publication 130]], 2015)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
''[[ICRP Glossary]] entry -  May 2019''&lt;/div&gt;</summary>
		<author><name>Intern</name></author>
		
	</entry>
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