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    <i>Interesting result.<br>
    </i><br>
    Curious.    Is the 90% figure based on particle count or weight, or
    something else?<br>
    <pre class="moz-signature" cols="72">Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  <a class="moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>
Skype:   paultlud    Phone: +1-309-452-7072
Website:  <a class="moz-txt-link-abbreviated" href="http://www.drtlud.com">www.drtlud.com</a></pre>
    <div class="moz-cite-prefix">On 5/9/2018 7:36 AM, Norbert Senf
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAGYvK4fXmb8Cj9PxLxw6aAp4cTbNKM8mPr2UysEirzg3H2c4rw@mail.gmail.com">
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      <div dir="ltr">Here's an interesting study, published today:<font
          size="2"><span style="font-weight:normal"><br>
            <br>
            "C</span><span style="font-weight:normal">oarse particulate
            matter (PM2.5–10) in Los Angeles Basin air induces
            expression of inflammation and cancer biomarkers in rat
            brains."<br>
          </span></font>
        <div><font size="2"><span style="font-weight:normal"><a
                href="https://www.nature.com/articles/s41598-018-23885-3"
                moz-do-not-send="true">https://www.nature.com/articles/s41598-018-23885-3</a><br>
            </span></font></div>
        <div><br>
        </div>
        <div><font size="2">What is interesting is that, even with long
            term exposure, they only found the specific biomarkers in
            PM2.5-10 (coarse PM), but not in ultrafine PM (<0.15 um)
            or fine PM (<2.5 um).<br>
          </font></div>
        <div><font size="2">90% of wood smoke PM is smaller than 1 um. <br>
          </font></div>
        <div><font size="2"><br>
          </font></div>
        <div><font size="2">Norbert</font><br>
        </div>
        <div><font size="2"><span style="font-weight:normal"></span></font></div>
        <div>
          <div class="gmail_extra"><br>
            <div class="gmail_quote">On Mon, May 7, 2018 at 3:19 PM,
              Norbert Senf <span dir="ltr"><<a
                  href="mailto:norbert.senf@gmail.com" target="_blank"
                  moz-do-not-send="true">norbert.senf@gmail.com</a>></span>
              wrote:<br>
              <blockquote class="gmail_quote" style="margin:0px 0px 0px
                0.8ex;border-left:1px solid
                rgb(204,204,204);padding-left:1ex">
                <div dir="ltr">(snip)<br>
                  <div>
                    <div class="gmail_extra">
                      <div class="gmail_quote">
                        <blockquote class="gmail_quote"
                          style="margin:0px 0px 0px
                          0.8ex;border-left:1px solid
                          rgb(204,204,204);padding-left:1ex">
                          <div>
                            ------------------------------<br>
                            Crispin Pemberton-Pigott <<a
                              href="mailto:crispinpigott@outlook.com"
                              target="_blank" moz-do-not-send="true">crispinpigott@outlook.com</a>>
                            wrote:<br>
                            (snip)<span class="gmail-"><br>
                              The cleaner the air in North America, the
                              more common asthma there is.  Is cleaner
                              air contributing to the shortening of
                              lives in North America? On the face of it,
                              possibly.<br>
                            </span></div>
                          (snip)<br clear="all">
                        </blockquote>
                        <div><br>
                        </div>
                        <div>"Yukon's clean air could be why fewer youth
                          are hospitalized with asthma"<br>
                          <a
href="http://www.cbc.ca/news/canada/north/yukon-asthma-hospitalization-cihi-clean-air-1.4639852"
                            target="_blank" moz-do-not-send="true">http://www.cbc.ca/news/canada/<wbr>north/yukon-asthma-<wbr>hospitalization-cihi-clean-<wbr>air-1.4639852</a></div>
                        <div><br>
                        </div>
                        <div>
                          <span>
                            <p><span>"...The report also shows that
                                asthma hospitalization rates tend to
                                be higher in urban areas in Canada,
                                compared to rural and remote areas. </span></p>
                            <p><span>"Our air is pretty pristine, and
                                air pollution is shown to be a factor
                                associated with asthma exacerbation,"
                                said Brendan Hanley, Yukon's Chief
                                Medical Officer of Health. </span></p>
                            <p><span>In places such as Nova Scotia and
                                Ontario, asthma hospitalization rates
                                are much higher in urban centres
                                compared to rural, the report said. A
                                similar comparison wasn't included
                                for Yukon because of a lack of data. </span></p>
                            (snip)
                            <p><span>But Hanley said Yukon's air quality
                                is not perfect. He says air pollution
                                tends to spike in residential areas due
                                to wood-burning, but those tend to be
                                short-term exposures. </span></p>
                            <p><span>Other possible reason for Yukon's
                                low rate could be attributed to good
                                access to primary care for children with
                                asthma and good rates of controls in
                                terms of medication, according to
                                Hanley." </span></p>
                          </span><span class="gmail-HOEnZb"><font
                              color="#888888">
                              <br>
                            </font></span></div>
                      </div>
                      <span class="gmail-HOEnZb"><font color="#888888">--
                          <br>
                          <div
                            class="gmail-m_-5555641857791561894gmail_signature">Norbert
                            Senf<br>
                            Masonry Stove Builders<br>
                            25 Brouse Road, RR 5<br>
                            Shawville Québec J0X 2Y0<br>
                            819.647.5092<br>
                            <a href="http://www.heatkit.com"
                              target="_blank" moz-do-not-send="true">www.heatkit.com</a></div>
                        </font></span></div>
                  </div>
                </div>
              </blockquote>
            </div>
            <br>
            <br clear="all">
            <br>
            -- <br>
            <div class="gmail_signature">Norbert Senf<br>
              Masonry Stove Builders<br>
              25 Brouse Road, RR 5<br>
              Shawville Québec J0X 2Y0<br>
              819.647.5092<br>
              <a href="http://www.heatkit.com" target="_blank"
                moz-do-not-send="true">www.heatkit.com</a></div>
          </div>
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