| DATE: |
2012-09-28 14:30 - 16:00 |
| PLACE: |
MLF #1 meeting room / #1meeting room on 2nd floor in 4-go-kan |
| TITLE: |
IMSS seminar (12-24) Viscous Dissipation Within Lipid Bilayers and Implications for Neutron Spin-Echo Spectroscopy |
| CONTACT: |
Hideki Seto, Norifumi Yamada |
| SPEAKER: |
Dr. Max Watson (National Institute of Standards and Technology) |
| LANGUAGE: |
English |
| ABSTRACT: |
Neutron spin-echo spectroscopy offers the unique ability to probe the dynamics of membranes on length scales which are especially relevant to biophysics. Modern interpretation of these measurements has relied on the theoretical predictions of Zilman and Granek; however, it was necessary to introduce an anomalously large solvent viscosity within this theory to obtain quantitative agreement with experiment. By using a model which includes the effect of viscous forces within the membrane, we have shown that a direct comparison between theory and experiment is indeed possible. For many cases, the results of the Zilman and Granek theory are recovered, except that the bending modulus appearing in their expressions is replaced by an effective dynamic bending modulus.
Numerical calculations have also allowed us to investigate several
effects which cannot be obtained with analytic techniques. |
