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Relaxation kinetics of lipid membranes and its relation to the heat capacity

MPS-Authors
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Grabitz,  P.
Research Group of Biophysics and Thermodynamics of Membranes, MPI for biophysical chemistry, Max Planck Society;

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Ivanova,  V. P.
Research Group of Biophysics and Thermodynamics of Membranes, MPI for biophysical chemistry, Max Planck Society;

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Heimburg,  T.
Research Group of Biophysics and Thermodynamics of Membranes, MPI for biophysical chemistry, Max Planck Society;

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599720.pdf
(Publisher version), 335KB

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Citation

Grabitz, P., Ivanova, V. P., & Heimburg, T. (2002). Relaxation kinetics of lipid membranes and its relation to the heat capacity. Biophysical Journal, 82(1), 299-309. Retrieved from http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B94RW-4TX14BD-10-1&_cdi=56421&_user=38661&_pii=S0006349502753952&_origin=search&_coverDate=01%2F31%2F2002&_sk=999179998&view=c&wchp=dGLbVzz-zSkzV&md5=37014de769b9128c0a2a5c8dc854c5ab&ie=/sdarticle.pdf.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0012-F47A-5
Abstract
We investigated the relaxation behavior of lipid membranes close to the chain-melting transition using pressure jump calorimetry with a temperature accuracy of similar to10(-3) K. We found relaxation times in the range from seconds up to about a minute, depending on vesicular state. The relaxation times, are within error proportional to the heat capacity. We provide a statistical thermodynamics theory that rationalizes the close relation between heat capacity and relaxation times. It is based on our recent finding that enthalpy and volume changes close to the melting transition are proportional functions.