Results 51 to 60 of about 277,155 (334)
Proceedings of the National Academy of Sciences of the United States of America, 2019 Significance To which extent gene regulatory programs are optimized by evolution is one of the fundamental biological questions. Swimming motility is one of the costliest bacterial behaviors, but expression of motility genes nevertheless increases when ...
B. Ni +4 more
semanticscholar +1 more source
Fractional Chemotaxis Diffusion Equations [PDF]
, 2010 We introduce mesoscopic and macroscopic model equations of chemotaxis with anomalous subdiffusion for modelling chemically directed transport of biological organisms in changing chemical environments with diffusion hindered by traps or macro-molecular ...
B. I. Henry +5 more
core +3 more sources
Uniform Regularity and Vanishing Viscosity limit for the chemotaxis-Navier-Stokes system in a 3D bounded domain [PDF]
Mathematical Methods in the Applied Sciences, 2017, 2016 We investigate the uniform regularity and vanishing viscosity limit for the incompressible chemotaxis-Navier-Stokes system in a smooth bounded domain $\Omega\subset\mathbb{R}^3$. It is shown that there exists a unique strong solution of the incompressible chemotaxis-Navier-Stokes system in a finite time interval which is independent of the viscosity ...
arxiv +1 more source
Perfect and near perfect adaptation in a model of bacterial chemotaxis [PDF]
, 2002 The signaling apparatus mediating bacterial chemotaxis can adapt to a wide range of persistent external stimuli. In many cases, the bacterial activity returns to its pre-stimulus level exactly and this "perfect adaptability" is robust against variations ...
Alon +30 more
core +4 more sources
Enhanced Diffusion and Chemotaxis at the Nanoscale. [PDF]
Accounts of Chemical Research, 2018 Enzymes have been recently proposed to have mechanical activity associated with their chemical activity. In a number of recent studies, it has been reported that enzymes undergo enhanced diffusion in the presence of their corresponding substrate when ...
J. Agudo-Canalejo +3 more
semanticscholar +1 more source
Modelling cell movement and chemotaxis pseudopod based feedback [PDF]
, 2011 A computational framework is presented for the simulation of eukaryotic cell migration and chemotaxis. An empirical pattern formation model, based on a system of non-linear reaction-diffusion equations, is approximated on an evolving cell boundary using ...
Insall, Robert H. +3 more
core +1 more source
Hölder estimates of weak solutions to degenerate chemotaxis systems with a source term [PDF]
arXiv, 2022 In this note we consider degenerate chemotaxis systems with porous media type diffusion and a source term satisfying the Hadamard growth condition. We prove the H\"older regularity for bounded solutions to parabolic-parabolic as well as for elliptic-parabolic chemotaxis systems.
arxiv
Supracellular contraction at the rear of neural crest cell groups drives collective chemotaxis
Science, 2018 Supracellular cable drives collective cell movement Neural crest cells migrate far and wide through a vertebrate embryo during development. Shellard et al. used Xenopus and zebrafish embryos to study how these clumps of mesenchymal cells migrate (see the
Adam Shellard +3 more
semanticscholar +1 more source
Identification of Chemotaxis Models with Volume Filling [PDF]
, 2015 Chemotaxis refers to the directed movement of cells in response to a chemical signal called chemoattractant. A crucial point in the mathematical modeling of chemotactic processes is the correct description of the chemotactic sensitivity and of the ...
Egger, Herbert +2 more
core +1 more source
Mechanisms involved in human eosinophil chemotaxis induced by the newly cloned C-C chemokine eotaxin
Allergology International, 1998 The present study was performed in order to investigate the mechanism(s) involved in eotaxin-induced normal human eosinophil chemotaxis using a 48-well micro-chemotaxis chamber assay.
Amr El-Shazly +3 more
doaj +1 more source