From: Helmut Coelfen <Helmut.Coelfen@MPIKG-GOLM.MPG.DE>
  To  : rasmb@alpha.bbri.org
  Date: Wed, 07 Mar 2001 20:10:22 +0100

Estimate of the density of hydration water

Hello out there,

for a principal investigation, I'm interested in the structuration of
water by
polymers expressed in a density increase. We find huge differences in the
overall solution density when certain synthetic polyelectrolytes are added;
far 
higher than expected from the buoyancy increment of the polymer. From some
of the 
last AUC conference talks I think to remember that it was observed that
hydration
water of proteins has a higher density than bulk water - probably an effect
of its
structuration in the contact area to the protein. Does anyone of you have a
citeable
Reference about this effect ?

Thanks a lot in advance for any help you can give. 

Best wishes

Helmut Cölfen




_______________________________________________________________
Dr. Helmut Cölfen
Max-Planck-Institute of Colloids and Interfaces
Colloid Chemistry
Am Mühlenberg 2
14424 Potsdav
Germany

Tel: --49 331 567-9513
Fax: --49 331 567-9502
http://www.mpikg-golm.mpg.de/kc/coelfen/
_______________________________________________________________