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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Dear Philip,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>OK, what I read
was regarding nanoparticles, so less than 0.1µ.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>I was trying to
understand Crispin’s sentence:<o:p></o:p></span></p>
<p class=MsoNormal><i><span lang=EN-CA style='font-size:11.0pt'>”particles are
too small to be impacted and stick in the lungs, and only enter the body by
diffusion, like gases. Small particles are inhaled and exhaled again.”<o:p></o:p></span></i></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Please bear
with me, so if I understand correctly:<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt;color:#1F497D'>From
2.5 to 0.5 micron particles : they are impacted and stick to the lungs<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt;color:#1F497D'>0.5,
0.4 (and below?): they start behaving like a gas, retention in the lungs is
very low, and they are inhaled and exhaled again?<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt;color:#1F497D'>Less
to 0.1 (nanoparticles): they go directly to the bloodstream?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>The INSERM has
found metal oxide nanoparticles in lung tissue sections of welders lungs. The
welders had lung alterations. The researchers tried to confirm if the metal
oxide nanoparticles could have an effect on health. So they tested it on rats.
They concluded there is a potential risk for respiratory health:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><a
href="https://www.tandfonline.com/doi/abs/10.1080/17435390.2016.1242797?src=recsys&journalCode=inan20">https://www.tandfonline.com/doi/abs/10.1080/17435390.2016.1242797?src=recsys&journalCode=inan20</a>
<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Best,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><br>
Xavier<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-family:"Tahoma","sans-serif"'>De :</span></b><span
style='font-family:"Tahoma","sans-serif"'> Stoves
[mailto:stoves-bounces@lists.bioenergylists.org] <b>De la part de</b> Philip
Lloyd<br>
<b>Envoyé :</b> dimanche 20 mai 2018 21:01<br>
<b>À :</b> 'Discussion of biomass cooking stoves'<br>
<b>Objet :</b> Re: [Stoves] ***SPAM*** Re: ***SPAM*** RE: Stoves Digest,
Vol 93, Issue 5<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;color:#1F497D'>Dear
Xavier<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;color:#1F497D'>The
question is – what capture mechanism can you dream up for a sub 0.5 micron
particle? It behaves just like a gas, has effectively no momentum. So how
does it “penetrate the body”? That is NOT true for 2,5-0.5 micron particles –
their kinetic energy at normal temperatures is enough to allow them to interact
with the stuff we are made of. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;color:#1F497D'>Philip<o:p></o:p></span></p>
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