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Re: [beemonitoring] alcohol based hand sanitizer preserved specimens

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  • Sam Droege
    Carbomer is the gelling agent and it is very sensitive to salts and changes in pH. Salts in particular cause the gel matrix to liquify. We seem to have good
    Message 1 of 3 , Mar 29, 2011
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      Carbomer is the gelling agent and it is very sensitive to salts and changes in pH.  Salts in particular cause the gel matrix to liquify.  We seem to have good luck with almost anything that has been preserved in alcohol or is a small dried insect.  Worms, small salamanders, isopods all have worked well.  

      Fresh specimens or things like grass cause the gel to dissolve.

      sam

      Sam Droege  sdroege@...                      
      w 301-497-5840 h 301-390-7759 fax 301-497-5624
      USGS Patuxent Wildlife Research Center
      BARC-EAST, BLDG 308, RM 124 10300 Balt. Ave., Beltsville, MD  20705
      Http://www.pwrc.usgs.gov

      I wish I were a jelly fish
      That cannot fall downstairs:
      Of all the things I wish to wish
      I wish I were a jelly fish
      That hasn't any cares,
      And doesn't even have to wish
      'I wish I were a jelly fish
      That cannot fall downstairs.'

      G.K.  Chesterton





      From:Elena Tartaglia <etartag@...>
      To:"Howlett, Anita" <ahowlett@...>
      Cc:"beemonitoring@yahoogroups.com" <beemonitoring@yahoogroups.com>
      Date:03/29/2011 08:19 PM
      Subject:Re: [beemonitoring] alcohol based hand sanitizer preserved specimens
      Sent by:beemonitoring@yahoogroups.com





       

      Interesting. I had this problem for some of my specimens but not others. All had been preserved in alcohol prior to when I put them into the hand sanitizer. I thought perhaps since my apartment (where I prepared the specimens) is cold but my office/lab (where I brought them later on to show off) is overly heated, it had caused the sanitizer to be in a more liquid-y state. But it didn't happen for all the specimens.

      Elena
      _____________________
      Elena Tartaglia
      Ph.D. Candidate
      Ecology & Evolution Program
      Rutgers University

      etartag@...


      On Tue, Mar 29, 2011 at 6:41 PM, Howlett, Anita <ahowlett@...> wrote:
       

      So, I tried the hand sanitizer specimen technique that was posted here a few weeks ago (I think it was here). I used Purell brand, (62% Ethyl Alcohol) and a deceased /dried Emperor Scorpion. After just a couple of days, the scorpion started to “leak” a white cloud like substance that took up most of the gel volume. The hand sanitizer gel turned completely liquid and I ended up ditching the entire nasty thing. The only step in the directions I didn’t do was the heating of the vial to release the air bubbles. I skipped it since my project had no bubbles. Any insight on what went wrong?

      I’ve got a few insect programs coming up and would like to use the specimens in vials, but not if I can’t figure this out. Thanks in advance! &n bsp;

      regards,

       

      Anita Schiller Howlett,

      Naturalist & natural resource specialist

      Jesse H. Jones Park & Nature Center

      20634 Kenswick Dr. Humble, TX 77338

      281.446.8588 www.hcp4.net/jones

      ahowlett@...

       




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