4 papers · 1 filter
Theory of Cell Body Lensing and Phototaxis Sign Reversal in "Eyeless" Mutants of
Sumit Kumar Birwa, Ming Yang, Adriana I. Pesci +1
Phototaxis of many species of green algae relies upon directional sensitivity of their membrane-bound photoreceptors, which arises from the presence of a pigmented "eyespot" behind…
Algal Optics
Ming Yang, Sumit Kumar Birwa, Raymond E. Goldstein
Nearly a decade ago it was discovered that the spherical cell body of the alga can act as a lens to concentrate incoming light onto the cell's membrane-…
Spatiotemporal distribution of the glycoprotein pherophorin II reveals stochastic geometry of the growing ECM of
Benjamin von der Heyde, Anand Srinivasan, Sumit Kumar Birwa +4
The evolution of multicellularity involved the transformation of a simple cell wall of unicellular ancestors into a complex, multifunctional extracellular matrix (ECM). A suitable…
Effect of Wall Friction on 2D Hopper Flow
Neil Shah, Brenda Carballo-Ramirez, Sumit Kumar Birwa +2
We report here on experiments and simulations examining the effect of changing wall friction on the gravity-driven flow of spherical particles in a vertical hopper. In 2D experimen…