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Dynamics of Crowded and Active Biological Systems

Author: Michael W Stefferson; Meredith D Betterton; Matthew A Glaser
Publisher: Ann Arbor : ProQuest Dissertations & Theses, 2018.
Dissertation: Ph.D. University of Colorado at Boulder 2018.
Edition/Format:   Thesis/dissertation : Document : Thesis/dissertation : eBook   Computer File : English
Publication:Dissertation Abstracts International, 80-02B(E)
Summary:
Interactions between particles and their environment can alter the dynamics of biological systems. In crowded media like the cell, interactions with obstacles can introduce anomalous subdiffusion. Active matter systems, e.g. , bacterial swarms, are nonequilibrium fluids where interparticle interactions and activity cause collective motion and dynamical phases. In this thesis, I discuss my advances in the fields of  Read more...
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Details

Genre/Form: Theses
Material Type: Document, Thesis/dissertation, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Michael W Stefferson; Meredith D Betterton; Matthew A Glaser
ISBN: 9780438382442 0438382447
OCLC Number: 1081379635
Language Note: English.
Notes: Source: Dissertation Abstracts International, Volume: 80-02(E), Section: B.
Advisors: Meredith D. Betterton; Matthew A. Glaser Committee members: Loren E. Hough; Joseph E. MacLennan; Franck J. Vernerey.
Description: 1 electronic resource (107 pages)
Responsibility: Michael W Stefferson.

Abstract:

Interactions between particles and their environment can alter the dynamics of biological systems. In crowded media like the cell, interactions with obstacles can introduce anomalous subdiffusion. Active matter systems, e.g. , bacterial swarms, are nonequilibrium fluids where interparticle interactions and activity cause collective motion and dynamical phases. In this thesis, I discuss my advances in the fields of crowded media and active matter. For crowded media, I studied the effects of soft obstacles and bound mobility on tracer diffusion using a lattice Monte Carlo model. I characterized how bound motion can minimize the effects of hindered anomalous diffusion and obstacle percolation, which has implications for protein movement and interactions in cells. I extended the analysis of binding and bound motion to study the effects of transport across biofilters like the nuclear pore complex (NPC). Using a minimal model, I made predictions on the selectivity of the NPC in terms of physical parameters. Finally, I looked at active matter systems. Using dynamical density functional theory, I studied the temporal evolution of a self-propelled needle system. I mapped out a dynamical phase diagram and discuss the connection between a banding instability and microscopic interactions.

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