Raymond E. Goldstein: Fluid and Light: Dinoflagellate Bioluminescence at the Single Cell Level

Mon, Mar 22, 2021, 12:15 pm
Location: 
Zoom
Speaker(s): 
Sponsor(s): 
CPBF an NSF PFC

One of the characteristic features of many marine dinoflagellates is their bioluminescence, which lights up nighttime breaking waves or seawater sliced
by a ship’s prow. While the internal biochemistry of light production by these microorganisms is well established, the manner by which fluid shear or mechanical
forces trigger bioluminescence is still poorly understood.  In this seminar I will describe controlled measurements of the relation between
mechanical stress and light production at the single-cell level, using high-speed imaging of micropipette-held cells of the marine dinoflagellate 
Pyrocystis lunula subjected to localized fluid flows or direct indentation. We find a viscoelastic response in which light intensity depends on both
the amplitude and rate of deformation, consistent with the action of stretch-activated ion channels. A phenomenological model captures the experimental observations.

Andrej Kosmrlj: Pattern formation in biological systems via mechanical instabilities and phase separation

Mon, Sep 20, 2021, 12:15 pm

Pattern formation is ubiquitous in biological systems.

Location: Joseph Henry Room

Louise Jawerth: Fiber growth, ultra-low surface tensions and glass-like aging: Protein condensates as novel materials

Jeanne Stachowiak: TBD

Mon, Oct 25, 2021, 12:15 pm

Danielle Bassett: TBD

Mon, Nov 8, 2021, 12:15 pm
Location: Joseph Henry Room

Genes, Geometry, and Development

Fri, Nov 12, 2021, 11:00 am

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Location: Virtual Event

Andrew Gordus: TBD

Mon, Dec 6, 2021, 12:15 pm
Location: Joseph Henry Room, Jadwin Hall

Chris Wiggins: TBD

Mon, Dec 13, 2021, 1:15 pm
Location: Zoom

Zvonimir Dogic: TBD

Mon, Feb 7, 2022, 12:15 pm
Location: Joseph Henry Room

Na Ji: TBD

Mon, Mar 21, 2022, 12:15 pm
Location: Joseph Henry Room

Arnold Mathijssen: TBD

Mon, Mar 28, 2022, 12:15 pm
Location: Joseph Henry Room

Gijsje Koenderink: TBD

Mon, Apr 11, 2022, 12:15 pm
Location: Zoom