[Nhcoll-l] optimal temperature

[Dirk Neumann]

Dear Marcela,

as John & Simon pointed out the relative humidity is as least as 
important as temperature, and even though temperature control seems most 
wanted, humidity fluctuations may cause even more issues. Whatever 
condition seems appropriate for your collection, try to keep conditions 
as constant as possible.

Two points I would like to add to the previous postings:
Humidity may not only effect containers and closures, but also shelving; 
wooden shelves may be distorted and warp which might endanger slender 
glasses to tip over, metal shelves may start rusting.

Rising temperatures or falling temperatures (compared to temperature 
conditions when closing containers) effect the inside pressure of 
containers. In relation to the head space, inside pressure may rise or 
fall by 1-2 bar, which is a lot. Both scenarios have potential to crack 
neck and/or lids of containers or, in case of rising temperatures, lift 
the lids.

This may be an issue in Buenos Aires especially during winter from May 
to June when you have low average temperatures but high humidity in the air.

Hope this helps
Dirk

Am 14.03.2013 17:12, schrieb Marcela Cosarinsky:
> Hi All,
> What temperature would you recommend for the best conservation of 
> biological collections kept in liquids (alcohol, formalin), squeletons 
> and embalmed animals?
>
> Many thanks, Marcela
>
> Marcela Cosarinsky (Curator)
> Sala de Colecciones - Departamento de Biodiversidad y biología 
> Experimental
> Facultad de Cs. Exactas y Naturales
> Universidad de Buenos Aires
> Argentina
> email: marce_irene at yahoo.com.ar
>
>
>
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> Nhcoll-l mailing list
> Nhcoll-l at mailman.yale.edu
> http://mailman.yale.edu/mailman/listinfo/nhcoll-l


-- 
Dirk Neumann

Tel: 089 / 8107-111
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---------

Dirk Neumann

Tel: +49-89-8107-111
Fax: +49-89-8107-300
email: Dirk.Neumann(a)zsm.mwn.de

postal address:

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