Berlin 2014 – wissenschaftliches Programm
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UP: Fachverband Umweltphysik
UP 11: Postersession
UP 11.12: Poster
Mittwoch, 19. März 2014, 17:00–18:30, MAG Poster
Freezing mechanisms of antifreeze proteins — •Bernd Kutschan1, Silke Thoms2, Klaus Morawetz1,3,4, and Sibylle Gemming5 — 1Münster University of Applied Sciences, Stegerwaldstrasse 39, 48565 Steinfurt, Germany — 2Alfred Wegener Institut, Am Handelshafen 12, D-27570 Bremerhaven, Germany — 3International Institute of Physics (IIP), Avenida Odilon Gomes de Lima 1722, 59078-400 Natal, Brazil — 4Max-Planck- Institute for the Physics of Complex Systems, 01187 Dresden, Germany — 5Institute of Ion Beam Physics and Materials Research, Helmholtz- Zentrum Dresden-Rossendorf, P.O. Box 51 01 19, 01314 Dresden, Germany
The fascinating ability of algae, insects and fishes to survive at temperatures below normal freezing is realized by antifreeze proteins (AFPs). The mechanism of these proteins and how they inhibit the freezing of water is still an open question. We extend our earlier phase-field models for salt channel formation in sea ice to simulate and explain the mechanism of AFPs. We suggest a new thermodynamic hysteresis process stabilizing the supercooled liquid state by a non-equilibrium effect which explains the non-colligative behaviour of antifreeze proteins. The research is supported by DFG-Priority Program 1158.