A position dependent friction model for solution reactions in the high friction regime: Proton transfer in triosephosphate isomerase (TIM)

1996 ◽  
Vol 105 (24) ◽  
pp. 10812-10818 ◽  
Author(s):  
Eyal Neria ◽  
Martin Karplus
Keyword(s):  
Proton Transfer ◽  
Triosephosphate Isomerase ◽  
Friction Model ◽  
Friction Regime

Energetics of triosephosphate isomerase: the nature of the proton transfer between the catalytic base and solvent water

Biochemistry ◽  
1976 ◽  
Vol 15 (25) ◽  
pp. 5621-5626 ◽  
Author(s):  
L. Mark Fisher ◽  
W. John Albery ◽  
Jeremy R. Knowles
Keyword(s):  
Proton Transfer ◽  
Triosephosphate Isomerase ◽  
Solvent Water

Parallel Sliding Load Support in the Mixed Friction Regime. Part 2—Evaluation of the Mechanisms

1987 ◽  
Vol 109 (1) ◽  
pp. 196-205 ◽  
Author(s):  
A. O. Lebeck
Keyword(s):  
Carrying Capacity ◽  
Friction Model ◽  
Load Carrying Capacity ◽  
Small Deviations ◽  
Mixed Friction ◽  
Friction Regime ◽  
Load Carrying ◽  
Parallel Surfaces ◽  
Parallel Geometry ◽  
Oil Type

When two parallel surfaces slide parallel to each other in the presence of a liquid, classical lubrication theory shows that no load carrying capacity should result. In Part 1 of this work the experimental data showing that such load support does occur are reviewed. In this paper several of the proposed mechanisms for parallel sliding load support are evaluated by combining the mechanism with a mixed friction model and comparing predictions to experimental results. Both water and oil type bearings are considered. While there are exceptions, it has been found that in general the thermal wedge, microasperity lubrication, microasperity collisions, and squeeze effects cannot account for the large apparent load support in the experimental cases studied. However, small deviations from parallel geometry have a strong effect and can easily account for the observed load support, but several questions remain. It is concluded that future investigations should be directed to developing a better understanding of how favorable macrogeometries might be developed and searching for other sources of pressure generation in parallel sliding.

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