Search
Now showing items 11-18 of 18
Coordinated Beating of Algal Flagella is Mediated by Basal Coupling
(National Academy of SciencesProceedings of the National Academy of Sciences (PNAS), 2016)
Cilia and flagella often exhibit synchronized behavior; this includes phase-locking, as seen in Chlamydomonas, and metachronal wave formation in the respiratory cilia of higher organisms. Since the observations by Gray and ...
Squirmers with swirl - a model for Volvox swimming
(Cambridge University PressJournal of Fluid Mechanics, 2016)
Colonies of the green alga Volvox are spheres that swim through the beating of pairs of flagella on their surface somatic cells. The somatic cells themselves are mounted rigidly in a polymeric extracellular matrix, fixing ...
Ferromagnetic and antiferromagnetic order in bacterial vortex lattices
(Nature Publishing GroupNature Physics, 2016-01-04)
Despite their inherently non-equilibrium nature [1] , living systems can self-organize in highly ordered collective states [2,3] that share striking similarities with the thermodynamic equilibrium phases [4,5] of conventional ...
Directed collective motion of bacteria under channel confinement
(Institute of PhysicsNew Journal of Physics, 2016-07-01)
Dense suspensions of swimming bacteria are known to exhibit collective behaviour arising from the
interplay of steric and hydrodynamic interactions. Unconfined suspensions exhibit transient,
recurring vortices and jets, ...
Instabilities and Solitons in Minimal Strips
(American Physical SocietyPhysical Review Letters, 2016-07-01)
We show that highly twisted minimal strips can undergo a nonsingular transition, unlike the singular transitions seen in the Möbius strip and the catenoid. If the strip is nonorientable, this transition is topologically ...
The Evolution of Silicon Transport in Eukaryotes
(Oxford University PressMolecular Biology and Evolution, 2016-10-11)
Biosilicification (the formation of biological structures from silica) occurs in diverse eukaryotic lineages, plays a major role in global biogeochemical cycles, and has significant biotechnological applications. Silicon ...
Elastohydrodynamic synchronization of adjacent beating flagella
(American Physical SocietyPhysical Review Fluids, 2016-11-01)
It is now well established that nearby beating pairs of eukaryotic flagella or cilia typically synchronize in phase. A substantial body of evidence supports the hypothesis that hydrodynamic coupling between the active ...
Filter-feeding, near-field flows, and the morphologies of colonial choanoflagellates
(American Physical SocietyPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2016-11-01)
Efficient uptake of prey and nutrients from the environment is an important component in the fitness of all microorganisms, and its dependence on size may reveal clues to the origins of evolutionary transitions to ...