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An atom is cooled by a standing-wave light field between two high-quality mirrors. Cavity cooling avoids the usual light scatter into the surroundings. Instead, the light leaking out of the mirrors is blue-shifted to a higher frequency (image credit: Pepijn Pinkse Max Planck Institute of Quantum Optics)
Artist's impression of an atom cooling device
NECF Meeting Abstracts

75th New England Complex Fluids Meeting
MIT | Friday, June 15, 2018
Registration deadline: Wednesday, June 13, 2018
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Abstracts for Invited Talks and Sound Bites:

Invited Talks

1. Invited; Julia Ortony


2. Rogers; W. Benjamin Rogers

Brandeis University

3. Weitz; TBD


4. Zhou; Shuang Zhou

UMass Amherst

Sound Bites

1. Srinivasan; C. Nadir Kaplan, L. Mahadevan

Harvard University
"Shape, form and dynamics of bacterial swarms and biofilms"
Collective microbial swarming and biofilm colonization on hydrated surfaces are important in many clinical settings, such as in the contamination of implants, catheters and during chronic infections. What are the physical constraints that set the limits to the structure and dynamics in expanding microbial colonies? To address this question, we develop a single unified multiphase framework that couples geometry, fluid flow, mechanical stresses, nutrient and osmolyte transport with localized cell growth and biomass production. Our model describes steady-state swarm expansion as fluid-mediated, and governed by osmolyte production and fluid exudation from the substrate. In contrast, transient biofilm colonization is nutrient-transport mediated, and governed by localized zones of exopolysaccharide production that drives expansion. Our unified framework allows us to explain a range of recent experimental observations associated with the shape, form and dynamics of Escherichia coli, Bacillus subtilis and Pseudomonas aeruginosa swarms and biofilms in terms of underlying mechanical and physical forces. In this manner, we demonstrate how hydrodynamics and transport serve as key physical constraints in regulating biological organization and function in microbial communities.
Keywords: bacterial swarms, bacterial biofilms, thin-film dynamics, capillarity, osmotic flows, front propagation

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