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<div class="moz-cite-prefix">Dear Marion,</div>
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<div class="moz-cite-prefix">in your specific case, it is worth considering a permanent seal for the jars, as you cannot avoid fluctuations of relative humidity in the exhibition (even though this might be mitigated by your display cases).</div>
<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">Colleagues at the MNHN in Paris looked into (permanent) seals and sealants (there should be an article in the special edition of CoFo for the PFC conference in Paris), but there is also the group in Neuchatel ate the HE-Arc, which
you probably know.</div>
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<div class="moz-cite-prefix">Dries van Dam and Simon Moore also published on suitability of specimens in glycerin and surely comment ...<br>
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<div class="moz-cite-prefix">Hope this helps</div>
<div class="moz-cite-prefix">Dirk <br>
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<div class="moz-cite-prefix">Am 24.06.2025 um 15:40 schrieb Marion BILLOT:</div>
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<p class="MsoNormal">Dear colleagues,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am currently working on an exhibition project involving fluid-preserved specimens, and I am exploring the possibility of replacing ethanol with glycerol for long-term display purposes. The main objective is to reduce fire hazards and
mitigate health risks in display environments (cases that are not airtight).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am preparing to present this proposal internally. As this practice is not yet established in my institution and tends to raise concerns, I would be very grateful for any feedback from professionals who have experience using glycerol in
this context.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To clarify:<o:p></o:p></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo3">The specimens are of strictly pedagogical value, they are not scientifically rare or culturally significant.<o:p></o:p>
</li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo3">We aim for long-term display in semi-sealed cases with limited air exchange.<o:p></o:p>
</li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo3">I understand that transferring specimens from ethanol to glycerol requires several days of transitional baths in demineralized water to avoid osmotic shock and tissue damage. I am
considering a gradual transition: ethanol 70<span style="font-family:"Arial",sans-serif"> </span>% → 50<span style="font-family:"Arial",sans-serif"> </span>% → 30<span style="font-family:"Arial",sans-serif"> </span>% → 10<span style="font-family:"Arial",sans-serif"> </span>%,
followed by glycerol in increasing quart-step dilutions. I will let it in a minimum of 4 hours for small specimen (5 cm).<o:p></o:p>
</li></ul>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoNormal">Have you used glycerol for display purposes in your institution? If so, under what conditions, and with what types of specimens? Any technical advice, protocol suggestions, or reference materials would be most appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you very much in advance for your insights. They will be very helpful in supporting a safer and more sustainable exhibition strategy.<o:p></o:p></p>
<p class="MsoNormal">Best regards, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Marion<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<font color="#4f4f4f" face="Verdana" size="1">Marion BILLOT</font><br>
<font color="#4f4f4f" face="Verdana" size="1">Collaboratrice support scientifique<br>
Invertébrés<br>
T. +41 22 418 6459</font><br>
<a href="mailto:marion.billot@geneve.ch" moz-do-not-send="true"><font color="red" face="Verdana" size="1">marion.billot@geneve.ch</font></a></td>
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<font color="#4f4f4f" face="Verdana" size="1">Muséum d'histoire naturelle (MHN)</font><br>
<font color="#4f4f4f" face="Verdana" size="1">Département de la culture et de la transition numérique</font><br>
<font color="#4f4f4f" face="Verdana" size="1">Route de Malagnou 1<br>
1208 Genève</font><br>
<a href="http://www.museum-geneve.ch" style="text-decoration:none" moz-do-not-send="true"><font color="red" face="Verdana" size="1">www.museum-geneve.ch</font></a></td>
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<font color="#4f4f4f" face="Verdana" size="1">Notre environnement est fragile, merci de n'imprimer ce message qu'en cas de nécessité.</font></td>
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