<div dir="ltr">Hi Sergio and all,<div><br></div><div>I am sharing a pdf of a published paper on the matter. It is not 100% conclusive for paraloid in the sense that they only tested one concentration and not others. My recommendation would be not to use it unless extremely necessary for the survival of the specimen. Also, it can be used locally and not in the whole surface, so that there are pristine surfaces, although this may be hard when the specimen is small or if contamination of the rest of the specimen is suspected to happen.</div><div><br></div><div>Finally, documentation is key. If the specimen has the treatment well documented, then it will be either discarded in the pool of possible ones to analyze, or sampled only in the suspected pristine surfaces.</div><div><br></div><div>Sergio, cualquier cosa podemos seguir conversando. A las órdenes.</div><div><br></div><div>This is a really interesting topic and I wish there was more research on it. Maybe I should do that after my PhD... 🤔</div><div>Best,</div><div>Mariana</div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><font color="#351c75" style="font-size:12.8px"><b>MSc. Mariana Di Giacomo</b></font><div style="font-size:12.8px"><font color="#351c75">PhD candidate University of Delaware</font></div><div style="font-size:12.8px"><font color="#351c75">SI Conservation Fellow - Smithsonian NMNH</font></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">2017-11-30 12:37 GMT-05:00 Sergio Montagud <span dir="ltr"><<a href="mailto:Sergio.Montagud@uv.es" target="_blank">Sergio.Montagud@uv.es</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Hi all<br>
<br>
As you know, some samples (including biological samples) must be treated with some kind of varnish taht helps to compact the external surface. This is important for woods, bones and nests collections, for example. A very useful product for this is the Paraloid, mixed with acetone to obtain a convenient solution that penetrates so inner in the object.<br>
<br>
Do you know (or imagine) if this combination (Paraloid + acetone) could be agressive for DNA preservation? I want to say if a sample treated with this chemical could lost the DNA (or DNA quality) much more than another without treatment?<br>
<br>
Thank you very much!<br>
<br>
Sergio<br>
<br>
--<br>
******************************<wbr>**<br>
Sergio Montagud Alario<br>
Universitat de València<br>
e-mail: <a href="mailto:sergio.montagud@uv.es">sergio.montagud@uv.es</a><br>
******************************<wbr>**<br>
<br>
______________________________<wbr>_________________<br>
Nhcoll-l mailing list<br>
<a href="mailto:Nhcoll-l@mailman.yale.edu">Nhcoll-l@mailman.yale.edu</a><br>
<a href="http://mailman.yale.edu/mailman/listinfo/nhcoll-l" rel="noreferrer" target="_blank">http://mailman.yale.edu/<wbr>mailman/listinfo/nhcoll-l</a><br>
<br>
______________________________<wbr>_________________<br>
NHCOLL-L is brought to you by the Society for the Preservation of<br>
Natural History Collections (SPNHC), an international society whose<br>
mission is to improve the preservation, conservation and management of<br>
natural history collections to ensure their continuing value to<br>
society. See <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.spnhc.org&d=DwMFaQ&c=cjytLXgP8ixuoHflwc-poQ&r=LpYc_Z_iN1KRw0hheb3x6-8MJUMu482qfHowpGYJqwc&m=YqHR6siCMqoicpDlZ7ICC9CvRt_mjraCZ7cCijsLE_U&s=moVGUD76UliJlLvB-xqLRTDqb-Z3YK62_DxOKxtJhu0&e=" rel="noreferrer" target="_blank">http://www.spnhc.org</a> for membership information.<br>
Advertising on NH-COLL-L is inappropriate.<br>
</blockquote></div><br></div></div>