[Nhcoll-l] Paraloid and DNA preservation

[Mariana Di Giacomo]

Hi Sergio and all,

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.

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.

Sergio, cualquier cosa podemos seguir conversando. A las órdenes.

This is a really interesting topic and I wish there was more research on
it. Maybe I should do that after my PhD... 🤔
Best,
Mariana

*MSc. Mariana Di Giacomo*
PhD candidate University of Delaware
SI Conservation Fellow - Smithsonian NMNH

2017-11-30 12:37 GMT-05:00 Sergio Montagud <Sergio.Montagud at uv.es>:

>
> Hi all
>
> 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.
>
> 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?
>
> Thank you very much!
>
> Sergio
>
> --
> ********************************
> Sergio Montagud Alario
> Universitat de València
> e-mail: sergio.montagud at uv.es
> ********************************
>
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