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Biological Physics : Poincare Seminar 2009 - Bertrand Duplantier

Biological Physics

Poincare Seminar 2009

By: Bertrand Duplantier (Editor), Vincent Rivasseau (Editor)

Hardcover Published: 29th October 2010
ISBN: 9783034604277
Number Of Pages: 170

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The book contains articles from leading experts in different areas of biological physics. Topics ranging from cell dynamics to the evolution of multicellularity to conscious versus non-conscious evidence accumulation are reviewed and discussed, both from a theoretical and an experimental perspective. Furthermore, current developments of practical applications like magnetic tweezers for the study of DNA replication and brain imaging are presented.

Forewordp. ix
Constructing Tools for the Description of Cell Dynamics
Introductionp. 1
Hydrodynamic theory of active gelsp. 2
Material science aspectsp. 5
Cell motilityp. 9
Cell oscillationsp. 16
Wound healing and cytokinesisp. 21
Conclusionp. 28
Referencesp. 30
A Physical Model of Cellular Symmetry Breaking
Introductionp. 33
The actin cortex and polarizationp. 34
Build-up and release of tension in actin cortices grown around beadsp. 36
Modeling of actin shell growth and rupture around beadsp. 38
Comparison of symmetry breaking in cells and around beadsp. 40
Symmetry can break from one point or from multiple pointsp. 41
Stress-induced polarization in other systemsp. 42
Conclusionp. 43
Referencesp. 43
Motor Proteins as Nanomachines: The Roles of Thermal Fluctuations in Generating Force and Motion
The force-generation problemp. 47
Rectified-diffusion modelp. 49
Flashing-ratchet modelp. 51
Huxley 1957 and powerstroke modelsp. 52
Hand-over-hand modelsp. 55
Open questionsp. 56
Referencesp. 57
Fluctuation Relations for Molecular Motors
Introductionp. 61
Stochastic models of molecular motorsp. 63
Fluctuation relations in models of molecular motorsp. 74
Conclusionsp. 84
Referencesp. 85
Studies of DNA-Replication at the Single Molecule Level Using Magnetic Tweezers
Introductionp. 89
Magnetic tweezersp. 90
How stretching and twisting DNA helps to track replication processp. 93
Study of the Replisomep. 98
Characterizing the helicase activityp. 101
Behaviour of the primosome: coupling activity of the helicase and the primasep. 107
DNA synthesisp. 114
Conclusionsp. 118
Referencesp. 119
Evolution of Biological Complexity
Introductionp. 123
Volvox and its relatives as model organismsp. 125
The advection-diffusion problemp. 127
Allometric scaling of flagella-driven flowsp. 129
Phototactic steeringp. 133
Flagellar synchronizationp. 134
Conclusionsp. 137
Referencesp. 137
Conscious and Nonconscious Processes: Distinct Forms of Evidence Accumulation?
An experimental strategy for exploring consciousnesp. 141
How do we measure whether conscious access occurred?p. 142
Subliminal processing and evidence accumulation modelsp. 144
Subliminal perceptionp. 145
Subliminal semantic processingp. 147
Subliminal accumulation of evidence towards a decisionp. 147
Role of instruction and attention in subliminal processingp. 149
Modulation by instructionsp. 150
Modulation by executive attentionp. 150
Modulation of subliminal priming by temporal attentionp. 150
Modulation by spatial attentionp. 152
Recent evidence for extended subliminal processingp. 152
Limits to subliminal processingp. 153
Durable and explicit information maintenancep. 154
Global access and novel combinations of operationsp. 154
Intentional actionp. 155
Cerebral bases of conscious and nonconscious computationsp. 155
A global workspace model of conscious accessp. 157
Accounting for subliminal processingp. 160
A distinct state of preconscious processingp. 161
Conclusion: Conscious access as a solution to von Neumann's problem?p. 163
Referencesp. 164
Table of Contents provided by Ingram. All Rights Reserved.

ISBN: 9783034604277
ISBN-10: 3034604270
Series: Progress in Mathematical Physics
Audience: Professional
Format: Hardcover
Language: English
Number Of Pages: 170
Published: 29th October 2010
Publisher: Birkhauser Verlag AG
Country of Publication: CH
Dimensions (cm): 23.5 x 15.5  x 1.52
Weight (kg): 0.47

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