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- W46750305 abstract "Membranes are two-dimensional structures embedded in a three-dimensional heat reservoir. At constant temperature, the heat capacity is proportional to the enthalpy fluctuations. However, when the membrane is embedded in a finite aqueous reservoir, the enthalpy and temperature fluctuations of the reservoir are intimately coupled to the enthalpy fluctuations of the membrane. Employing Monte Carlo simulations, we show that membranes embedded in water reservoirs of various sizes display different enthalpy fluctuations and fluctuation time scales. In particular, larger water reservoirs result in a larger enthalpy fluctuations of the membrane and in slower fluctuation time scales (relaxation times). In periodic processes such as sound propagation in membranes, the membrane has only a finite time available to exchange heat with the medium. A larger frequency therefore reduces the accessible volume of the reservoir. We discuss the relevance of these considerations for the frequency dependence of the compressibility and the heat capacity, the velocity of sound in membranes, and the natural timescale of some dynamic processes such as the propagation of electromechanical pulses during the action potential of nerves." @default.
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- W46750305 date "2013-05-17" @default.
- W46750305 modified "2023-09-27" @default.
- W46750305 title "The heat capacity of lipid membranes in finite reservoirs and the relation to the frequency dependence" @default.
- W46750305 hasPublicationYear "2013" @default.
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