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<div class="moz-cite-prefix">Dear John,</div>
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<div class="moz-cite-prefix">I would prefer NUNC Store-it tubes
(article 264300;
<a class="moz-txt-link-freetext" href="https://www.thermofisher.com/order/catalog/product/264262#/264262">https://www.thermofisher.com/order/catalog/product/264262#/264262</a>)</div>
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<div class="moz-cite-prefix">We tested them against Sarsted and
other brands in a warm water bath > 50°C and they were among
the tightest ones; also, they DON'T have an silicone O-ring (which
will fail after some time); we had to replace poor quality tubes
twice so far and besides necessary replacement costs and time
needed to transfer tissues the huge evaporation loss (> 50% in
some tubes) surely affected the integrity of the tissues / DNA.</div>
<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">The NUNC-tubes have a flange and really
need to be screwed down tight (which is a bit annoying), but we
have them on storage since 2004, use them in the tropic in the
field and their performance is excellent. Bit more expensive, but
this slightly higher investment pays off in the long run.</div>
<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">Hope this helps,</div>
<div class="moz-cite-prefix">with best wishes</div>
<div class="moz-cite-prefix">Dirk<br>
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<div class="moz-cite-prefix">Am 17.08.2020 um 23:42 schrieb John
Edwin Lattke Bravo:<br>
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Hello,</div>
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<br>
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Does anybody have any thoughts or experience to share regarding
the comparative merits of 2ml cryogenic vials by Corning,
Sarstedt and Granier for long term storage of insects in
ethanol? Is the quality amongst the three similar? Positive
experiences? Negative one? Just needing some user experience to
help decide what might deliever the best bang for the buck (or
real, in my case).</div>
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<br>
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Obrigado, <br>
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<br>
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John Lattke<br>
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<div class="moz-signature">-- <br>
<p><img src="cid:part1.E0834200.7EE10A57@snsb.de" alt=""
width="152" height="59"></p>
<p><br>
Dirk Neumann<br>
<br>
Tel: 089 / 8107-111<br>
Fax: 089 / 8107-300<br>
neumann(a)snsb.de<br>
<br>
Postanschrift:<br>
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Zoologische Staatssammlung München<br>
Dirk Neumann, Sektion Ichthyologie / DNA-Storage<br>
Münchhausenstr. 21<br>
81247 München<br>
<br>
Besuchen Sie unsere Sammlung:<br>
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<br>
---------<br>
<br>
Dirk Neumann<br>
<br>
Tel: +49-89-8107-111<br>
Fax: +49-89-8107-300<br>
neumann(a)snsb.de<br>
<br>
postal address:<br>
<br>
Bavarian Natural History Collections<br>
The Bavarian State Collection of Zoology<br>
Dirk Neumann, Section Ichthyology / DNA-Storage<br>
Muenchhausenstr. 21<br>
81247 Munich (Germany)<br>
<br>
Visit our section at:<br>
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