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  Compressibility of lipid mixtures studied by calorimetry and ultrasonic velocity measurements

Schrader, W., Ebel, H., Grabitz, P., Hanke, E., Heimburg, T., Hoeckel, M., et al. (2002). Compressibility of lipid mixtures studied by calorimetry and ultrasonic velocity measurements. Journal of Physical Chemistry B, 106(25), 6581-6586. Retrieved from http://pubs.acs.org/doi/pdfplus/10.1021/jp014029g.

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Schrader, W., Author
Ebel, H.1, Author           
Grabitz, P.1, Author           
Hanke, E., Author
Heimburg, T.1, Author           
Hoeckel, M., Author
Kahle, M., Author
Wente, F., Author
Kaatze, U., Author
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1Research Group of Biophysics and Thermodynamics of Membranes, MPI for biophysical chemistry, Max Planck Society, ou_578546              

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 Abstract: Ultrasonic velocity and heat capacity temperature profiles of various lipid mixtures have been recorded with high accuracy. This included mixtures of phophatidylcholines with different chain length as well as phosphatidylcholine mixtures with diacyl glycerides. Following previous studies relating the heat capacity to the isothermal compressibility of lipids close to the chain melting transition, we found that the measured ultrasonic velocities are very similar to those calculated from the heat capacity. This implies that we are able to determine the compressibility changes from the excess heat capacity and the heat capacity changes from ultrasonic velocity measurements. The sound velocity and heat capacity traces are discussed with respect to the phase diagrams of the lipid mixtures.

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Language(s): eng - English
 Dates: 2002-06-27
 Publication Status: Issued
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 Rev. Type: Peer
 Identifiers: eDoc: 16477
URI: http://pubs.acs.org/doi/pdfplus/10.1021/jp014029g
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Title: Journal of Physical Chemistry B
Source Genre: Journal
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Pages: - Volume / Issue: 106 (25) Sequence Number: - Start / End Page: 6581 - 6586 Identifier: -