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Collective behavior of proteins on biomembranes is usually studied within the spontaneous curvature model. Here we consider an alternative phenomenological approach, which accounts consistently for partial ordering of proteins as well as…

软凝聚态物质 · 物理学 2014-09-03 O. V. Manyuhina

Spatiotemporal patterns are common in biological systems. For electrically-coupled cells previous studies of pattern formation have mainly used external forcing as the main bifurcation parameter. The purpose of this paper is to show that…

动力系统 · 数学 2021-11-02 H. O. Fatoyinbo , R. G. Brown , D. J. W. Simpson , B. van Brunt

We describe the formation of deposition patterns that are observed in many different experiments where a three-phase contact line of a volatile nanoparticle suspension or polymer solution recedes. A dynamical model based on a long-wave…

流体动力学 · 物理学 2011-06-24 Lubor Frastia , Andrew J. Archer , Uwe Thiele

We introduce a minimal model for a collection of self-propelled apolar active particles, also called as `active nematic', on a two-dimensional substrate and study the order-disorder transition with the variation of density. The particles…

统计力学 · 物理学 2015-09-18 Rakesh Das , Manoranjan Kumar , Shradha Mishra

We present theory and simulation of simultaneous chemical demixing and phase ordering in a polymer-liquid crystal mixture in conditions where isotropic- isotropic phase separation is metastable with respect to isotropic-nematic phase…

材料科学 · 物理学 2015-05-13 Ezequiel R. Soulé , Alejandro D. Rey

In this work we investigate the effect of density dependent nonlinear diffusion on pattern formation in the Brusselator system. Through linear stability analysis of the basic solution we determine the Turing and the oscillatory instability…

数学物理 · 物理学 2015-06-17 G. Gambino , M. C. Lombardo , M. Sammartino , V. Sciacca

We analyze a model of mutually-propelled filaments suspended in a two-dimensional solvent. The system undergoes a mean-field isotropic-nematic transition for large enough filament concentrations and the nematic order parameter is allowed to…

软凝聚态物质 · 物理学 2011-05-26 L. Giomi , L. Mahadevan , B. Chakraborty , M. F. Hagan

Simulations show that when a phase-separated binary AB fluid is driven to flow past chemically patterned substrates in a microchannel, the fluid exhibits unique morphological instabilities. For the pattern studied, these instabilities give…

软凝聚态物质 · 物理学 2009-11-10 Olga Kuksenok , David Jasnow , Julia Yeomans , Anna C. Balazs

A collection of thin structures buckle, bend, and bump into each-other when confined. This contact can lead to the formation of patterns: hair will self-organize in curls; DNA strands will layer into cell nuclei; paper, when crumpled, will…

软凝聚态物质 · 物理学 2023-04-19 Arman Guerra , Anja Slim , Douglas P. Holmes , Ousmane Kodio

Topological defects play a central role in the formation and organization of various biological systems. Historically, such nonequilibrium defects have been mainly studied in the context of homogeneous active nematics. Phase-separated…

软凝聚态物质 · 物理学 2023-07-13 Timo Krüger , Ivan Maryshev , Erwin Frey

The dynamics of cellular pattern formation is crucial for understanding embryonic development and tissue morphogenesis. Recent studies have shown that human dermal fibroblasts cultured on liquid crystal elastomers can exhibit an increase in…

生物物理 · 物理学 2023-08-25 Mengyang Gu , Xinyi Fang , Yimin Luo

The presence of one or more species at some spatial locations but not others is a central matter in ecology. This phenomenon is related to ecological pattern formation. Nonlocal interactions can be considered as one of the mechanisms…

种群与进化 · 定量生物学 2017-12-29 Ozgur Aydogmus

We study two mechanisms for the formation of protein patterns near membranes of living cells by mathematical modelling. Self-assembly of protein domains by electrostatic lipid-protein interactions is contrasted with self-organization due to…

细胞行为 · 定量生物学 2007-05-23 Karin John , Markus Baer

Vertically vibrated rod-shaped granular materials confined to quasi-2D containers self organize into distinct patterns. We find, consistent with theory and simulation, a density dependent isotropic-nematic transition. Along the walls, rods…

软凝聚态物质 · 物理学 2009-11-11 J. Galanis , D. Harries , D. L. Sackett , W. Losert , R. Nossal

We consider the weakly first order phase transition between the isotropic and ordered phases of nematics in terms of the behavior of topological line defects. Analytical and Monte Carlo results are presented for a new coarse-grained lattice…

凝聚态物理 · 物理学 2009-10-28 Paul E. Lammert , Daniel S. Rokhsar , John Toner

Engineering synthetic materials that mimic the remarkable complexity of living organisms is a fundamental challenge in science and technology. We study the spatiotemporal patterns that emerge when an active nematicfilm of microtubules and…

There is now growing evidence of the emergence and biological functionality of liquid crystal features, including nematic order and topological defects, in cellular tissues. However, how such features that intrinsically rely on particle…

软凝聚态物质 · 物理学 2019-02-06 Romain Mueller , Julia Yeomans , Amin Doostmohammadi

Pattern formation in the classical and fractional Schnakenberg equations is studied to understand the nonlocal effects of anomalous diffusion. Starting with linear stability analysis, we find that if the activator and inhibitor have the…

斑图形成与孤子 · 物理学 2021-06-21 Hatim Khudhair , Yanzhi Zhang , Nobuyuki Fukawa

When thin films are grown on a substrate by chemical vapor deposition, the evolution of the first deposited layers may be described, on mesoscopic scales, by dynamical models of the reaction-diffusion type. For monoatomic layers, such…

介观与纳米尺度物理 · 物理学 2015-06-16 Daniel Walgraef

Fully developed turbulence is a universal and scale-invariant chaotic state characterized by an energy cascade from large to small scales where the cascade is eventually arrested by dissipation. In this article, we show how to harness these…

软凝聚态物质 · 物理学 2024-04-09 Xander M. de Wit , Michel Fruchart , Tali Khain , Federico Toschi , Vincenzo Vitelli