**************** The 3rd., Lab Seminar *****************

Date: Mon, May 30, 2005  PM 1:30-

Place: No.616 Seminar room
　　　　　　 Graduate School of Information Science

Speaker: Masayosi Takayanagi

Title: Vibrational Energy Transfer and Heat Conduction in a Protein

Abstract:
 The normal modes of myoglobin, their lifetimes, the speed of sound, and
mean free path are calculated to determine the coefficient of thermal
conductivity and thermal diffusivity for the protein. A propensity is
found for frequency differences of normal modes localized to nearby regions
of the protein to be several hundred cm-1. As a result, the anharmonic decay
rate of higher frequency, localized normal modes, calculated by perturbation
theory, is typically nearly independent of temperature, consistent with
results of pump-probe studies on myoglobin. The thermal diffusivity of
myoglobin at 300K is calculated to be 14 Å2ps-1, the same as the value
for water. Ther thermal conductivity at 300K is found to be 2.0 mWcm-1K-1,
abount one-third the value for water.

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