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<span style="margin:0px">Hello all,<span style="margin:0px"></span></span></p>
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<span style="margin:0px"><span style="margin:0px"> </span></span></p>
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<span style="margin:0px">Please join us today (2/28) for our Enviro-linch seminar series. Today, our guest speaker is Dr. Kate Heckman from USDA who will present her research about carbon cycling in forests and grasslands. Please join us between 12-1 pm (PST)
via zoom.<span style="margin:0px"></span></span></p>
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<span style="margin:0px"><span style="margin:0px"> </span></span></p>
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<a href="https://ucmerced.zoom.us/j/175736103" target="_blank" style="margin:0px;color:rgb(5, 99, 193);text-decoration:underline"><span style="margin:0px">https://ucmerced.zoom.us/j/175736103</span></a><span class="x_gmail-MsoHyperlink" style="margin:0px;color:rgb(5, 99, 193);text-decoration:underline"><span style="margin:0px"><span style="margin:0px"></span></span></span></p>
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<span style="margin:0px">Title:<span> </span></span>Climate and physicochemical controls on C cycling in forests and grasslands of the conterminous USA</p>
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See you all soon.</p>
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Regards,</p>
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Manisha and KJ</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Enviro-lunch <enviro-lunch-bounces@lists.ucmerced.edu> on behalf of Kyungjin Min <kjmin.21@gmail.com><br>
<b>Sent:</b> Tuesday, February 22, 2022 10:51 AM<br>
<b>To:</b> enviro-lunch@lists.ucmerced.edu <enviro-lunch@lists.ucmerced.edu><br>
<b>Subject:</b> [Enviro-lunch] Enviro-lunch (2/28, M): Dr. Kate Heckman from USDA</font>
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<div dir="ltr"><img alt="image.png" width="353" height="94" data-outlook-trace="F:1|T:1" src="cid:ii_kzyhfqg90"><br>
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<span>Hello all,<span></span></span></p>
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<span><span> </span></span></p>
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<span>Next Monday (2/28) Dr. Kate Heckman from USDA will present her research about carbon cycling in forests and grasslands. Please join us between 12-1 pm (pacific) via zoom.
<span></span></span></p>
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<span><span> </span></span></p>
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<a href="https://ucmerced.zoom.us/j/175736103" target="_blank" style="color:rgb(5,99,193); text-decoration:underline"><span>https://ucmerced.zoom.us/j/175736103</span></a><span class="x_gmail-MsoHyperlink" style="color:rgb(5,99,193); text-decoration:underline"><span><span></span></span></span></p>
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<span>Title: </span>Climate and physicochemical controls on C cycling in forests and grasslands of the conterminous USA<span style="background:white none repeat scroll 0% 0%"><span></span></span></p>
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<span><span> </span></span></p>
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<span>Abstract: </span>Mechanisms of soil organic matter (SOM) stabilization regulate turnover of SOM by making biodegradation energetically or physically unfavorable. Though similar mechanisms of SOM stabilization are at work across a wide diversity of soils,
which soil conditions determine their relative importance is just beginning to be elucidated. We utilized soil cores from 35 National Ecological Observatory Network (NEON) experimental plots, covering a wide diversity of ecosystem and soil types, to examine
the influence of physicochemical parameters on soil C abundance and turnover, and their relative importance in comparison to climatic variables. Soils from three depths at each site were density fractionated into free/light, occluded and heavy fractions. Carbon
and radiocarbon abundance were examined among fractions and in the context of climatic variables (e.g. temperature, precipitation, moisture balance) and soil physiochemical variables (e.g. texture, pH, exchangeable cations, reactive metals). The abundance
and persistence (i.e. stability or mean residence time) of C differed among fractions and with depth, as expected. Organic matter abundance in surface horizons was more closely associated with climate variability than that of subsurface horizons. Perhaps the
most interesting result of this study is the strong bifurcation in soil organic matter cycling characteristics in arid versus humid environments.
<span></span></p>
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Bio: </p>
<img alt="image.png" width="263" height="197" data-outlook-trace="F:1|T:1" src="cid:ii_kzyhgpfm1"><br>
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<span></span></p>
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<span style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span>BA in Biology & Environmental Science in 2004 from Drury University in Springfield, Missouri.<span></span></p>
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<span style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span>PhD in Soil, Water & Environmental Science in 2010 from University of Arizona in Tucson, Arizona.<span></span></p>
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<span style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span>2011-2015: Postdoc focused on the application of radiocarbon to earth system sciences with an emphasis on temperate mineral soils. Employed by the USDA Forest Service and stationed remotely as a Visiting Scientist at Lawrence Livermore
National Laboratory.<span></span></p>
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<span style="font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span>2015-current: Research Scientist for the USDA Forest Service, Northern Research Station, in Houghton, Michigan. Directs a radiocarbon research program for the Forest Service, mostly focused on assisting and leading research associated with
the application of radiocarbon analysis to C cycle and climate change questions. Personal research assignment focused on the biogeochemistry of mineral soils, specifically regarding mechanisms of soil organic carbon stabilization.<span></span></p>
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<span><span> </span></span></p>
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<span style="font-size:11pt; font-family:"Calibri",sans-serif; color:black">Sincerely,</span><span style="font-size:11pt; font-family:"Calibri",sans-serif"><span></span></span></p>
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<span>co-host: KJ Min & Manisha Dolui<span></span></span></p>
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<span>Faculty coordinator: Asmeret Asefaw Berhe<span></span></span></p>
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<span>Spring 2022 Enviro-Lunch Schedule<span></span></span></p>
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<b><span style="color:white">date</span><span style="color:white"><span></span></span></b></p>
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<b><span style="color:white">speaker</span><span style="color:white"><span></span></span></b></p>
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<b><span style="color:white">title</span><span style="color:white"><span></span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">1/31</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Mariela Garcia Arrendondo<br>
</span><span style="font-size:8pt; color:black">@ Umass-Amherst</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Root-mediated weathering</span><span></span></p>
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<td width="47" valign="top" style="width:35.1pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219); border-style:none solid solid; border-width:medium 1pt 1pt; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">2/7</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span>Michael Philben<br>
</span><span style="font-size:8pt">@ Hope College</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Rethinking carbon and nitrogen isotope fractionation during soil organic matter decomposition</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">2/14</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Alyssa Griffin*<br>
</span><span style="font-size:8pt; color:black">@ UC Davis</span><span style="color:black">
</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">The role of coastal marine sediments in carbon cycling from local to global scales</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:red">2/21</span><span style="color:red"><span></span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:red">Presidents’ day</span><span style="color:red"><span></span></span></p>
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<span style="color:red"><span> </span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">2/28</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Katherine Heckman<br>
</span><span style="font-size:8pt; color:black">@ USDA</span><span></span></p>
</td>
<td width="396" valign="top" style="width:296.75pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219) currentcolor; border-style:none solid solid none; border-width:medium 1pt 1pt medium; background:rgb(217,226,243) none repeat scroll 0% 0%; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Density fractionation and soil carbon stabilization</span><span></span></p>
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<td width="47" valign="top" style="width:35.1pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219); border-style:none solid solid; border-width:medium 1pt 1pt; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">3/7</span><span></span></b></p>
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<td width="181" valign="top" style="width:135.65pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219) currentcolor; border-style:none solid solid none; border-width:medium 1pt 1pt medium; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span>Bhavna Arora<br>
</span><span style="font-size:8pt">@ LBNL</span><span></span></p>
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<td width="396" valign="top" style="width:296.75pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219) currentcolor; border-style:none solid solid none; border-width:medium 1pt 1pt medium; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Reactive transport modeling</span><span></span></p>
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<td width="47" valign="top" style="width:35.1pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219); border-style:none solid solid; border-width:medium 1pt 1pt; background:rgb(217,226,243) none repeat scroll 0% 0%; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">3/14</span><span></span></b></p>
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<td width="181" valign="top" style="width:135.65pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219) currentcolor; border-style:none solid solid none; border-width:medium 1pt 1pt medium; background:rgb(217,226,243) none repeat scroll 0% 0%; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Darian Smercina <br>
</span><span style="font-size:8pt; color:black">@ PNNL</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Free N fixing under switchgrass (Linking microbial scale processes to ecosystem function)</span><span></span></p>
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<b><span style="color:red">3/21</span><span style="color:red"><span></span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:red">spring break</span><span style="color:red"><span></span></span></p>
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<span style="color:red"><span> </span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">3/28</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Meng Zhao<br>
</span><span style="font-size:8pt; color:black">@ Stanford U</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Plant-water relationship (evapotranspiration) modeling</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">4/4</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span>Hannah Naughton<br>
</span><span style="font-size:8pt">@ LBNL</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Root vs. topographic generation of redox anomalies on a subalpine hillslope and floodplain</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">4/11</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Michael Rowley<br>
</span><span style="font-size:8pt; color:black">@ LBNL</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Ca-mediated soil organic carbon stabilization</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">4/18</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span>Weiyu Li*<br>
</span><span style="font-size:8pt">@ Stanford U</span><span></span></p>
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<td width="396" valign="top" style="width:296.75pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219) currentcolor; border-style:none solid solid none; border-width:medium 1pt 1pt medium; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Data-driven hydraulic modeling</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">4/25</span><span></span></b></p>
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<td width="181" valign="top" style="width:135.65pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219) currentcolor; border-style:none solid solid none; border-width:medium 1pt 1pt medium; background:rgb(217,226,243) none repeat scroll 0% 0%; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Daniel Zuleta</span><span><span></span></span></p>
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="font-size:8pt; color:black">@ Smithsonian Institute</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Tree mortality in tropical ecosystems</span><span></span></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<b><span style="color:black">5/2</span><span></span></b></p>
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<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span>Genevieve Noyce<br>
</span><span style="font-size:8pt">@ Smithsonian Institute</span><span></span></p>
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<td width="396" valign="top" style="width:296.75pt; border-color:currentcolor rgb(142,170,219) rgb(142,170,219) currentcolor; border-style:none solid solid none; border-width:medium 1pt 1pt medium; padding:0in 5.4pt">
<p class="x_MsoNormal" style="margin:0in; line-height:normal; font-size:11pt; font-family:"Calibri",sans-serif">
<span style="color:black">Greenhouse gas emissions from wetland with climate change</span><span></span></p>
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<span><span> </span></span></p>
<p class="x_MsoNormal" style="margin:0in 0in 8pt; line-height:107%; font-size:11pt; font-family:"Calibri",sans-serif">
<span><span> </span></span></p>
<p class="x_MsoNormal" style="margin:0in 0in 8pt; line-height:107%; font-size:11pt; font-family:"Calibri",sans-serif">
<span><span> </span></span></p>
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