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Eisenstein, Laura Marque, Jeffrey Joshua 2011-06-07T18:20:21Z 2011-06-07T18:20:21Z 10000-01-01 1984 This thesis is a report on three separate but closely related experiments with the energy tranducing purple membrane from Halobacterium halobium. In the first experiment, we used flash photolysis to measure the effects of solvent viscosity on the kinetics of the purple membrane photocycle, and we analyzed the data in terms of a modified Kramers' theory. In the second experiment, we determined the purple membrane's apparent density, thermal expansivity, isothermal and adiabatic compressibilities, and specific heats at constant pressure and constant volume. In the final experiment, we studied the effects of high pressure on the kinetics of the photocycle. We found that all of the distinct processes in the photocycle are retarded by pressure. The results of the pressure and viscosity studies are very highly correlated. We interpret this to mean that the primary effect of pressure on the photocycle is via its increase of the intrinsic viscosity of the membrane. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-07T18:20:21Z No. of bitstreams: 1 1984_marque.pdf: 3681336 bytes, checksum: 2a50eacc056afb217cff463478c452ff (MD5) Made available in DSpace on 2011-06-07T18:20:21Z (GMT). No. of bitstreams: 1 1984_marque.pdf: 3681336 bytes, checksum: 2a50eacc056afb217cff463478c452ff (MD5) Previous issue date: 1984 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-07T18:20:21Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:14:06-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 840250 http://hdl.handle.net/2142/25345 eng 1984 Jeffrey Joshua Marque thermodynamics kinetics purple membrane halobacterium halobium flash photolysis solvent viscosity Thermodynamic and kinetic studies of purple membrane from halobacterium halobium text Dissertation / Thesis Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.