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<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, thanks for
the precisions.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>But don’t the
recent studies found, or suspect, that below a certain size, like below 0.1µ,
retention increases since the nanoparticles cross the cell membranes?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Not sure I
understood right.<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'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Xavier<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'><o:p> </o:p></span></p>
<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>
plloyd@mweb.co.za<br>
<b>Envoyé :</b> mardi 22 mai 2018 09:01<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>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>We
measured retention of silica dust as a function of particle size. The human
filter scavenged everything above 10 micron very well. Between 10 & 2.5
there was degradation and increasing quantities were retained. Below 2.5 down
to about 0.8 retention increased. Below about 0.6retention dropped rapidly ,and
was effectively nil from 0.3.</span><br>
This was publshed back in about 1974, research by the gold mining industry in
Johannesburg.<br>
Philip<br>
<br>
Sent from my Huawei Mobile<o:p></o:p></p>
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<br>
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