[Nhcoll-l] Freezer recommendation

[Gali Beiner]

Dear All,

I'd like to ask for opinions regarding the choice of a freezer for our
herbarium. The herbarium already has a -40C freezer for pest
control purposes, but the combination of large quantities of incoming
material for freezing with questions regarding additional possible uses for
the freezer raised the question whether a new, additional freezer should be
a -40C freezer or a -80C freezer.

Generally speaking, pest control does not usually require temperatures as
low as -80C, but DNA preservation (samples, tissues from non-herbal
collections) does. Would you consider keeping a -80C freezer to serve both
purposes as need arises? I'm curious to hear whether other herbaria use
-80C freezers or choose higher temperatures. There is of course the
question of cost vs actual requirements, and the main requirement right now
is for pest control prior to entry into the herbarium.

A penny for your thoughts,

Gali
-- 
Gali Beiner (ACR)
Conservator, Palaeontology Lab
National Natural History Collections
The Hebrew University of Jerusalem
Berman Building, Edmond J. Safra campus, Givat Ram
Jerusalem 91904, Israel
Fax. 972-2-6585785
*gali.beiner at mail.huji.ac.il <gali.beiner at mail.huji.ac.il>*

*https://nnhc.huji.ac.il/?lang=en <https://nnhc.huji.ac.il/?lang=en>*
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