Results 61 to 70 of about 2,373,621 (185)

Cilium height difference between strokes is more effective in driving fluid transport in mucociliary clearance: A numerical study

Mathematical Biosciences and Engineering, 2015
Mucociliary clearance is the first line of defense in our airway. The purpose of this study is to identify and study key factors in the cilia motion that influence the transport ability of the mucociliary system.
Ling Xu, Yi Jiang
doaj   +1 more source

Pathogenesis of chronic rhinosinusitis with nasal polyps: role of IL-6 in airway epithelial cell dysfunction

Journal of Translational Medicine, 2020
Background Chronic rhinosinusitis with nasal polyps (CRSwNP) is characterized by an alteration in airway epithelial cell functions including barrier function, wound repair mechanisms, mucociliary clearance.
Emilie Bequignon, David Mangin, Justine Bécaud, Jennifer Pasquier, Christelle Angely, Mathieu Bottier, Estelle Escudier, Daniel Isabey, Marcel Filoche, Bruno Louis, Jean-François Papon, André Coste   +11 more
doaj   +1 more source

Synchronization and metachronal waves of elastic cilia caused by unsteady viscous flow

Physical Review Research
Hydrodynamic coordination of cilia is ubiquitous in biology. It is commonly modeled using the steady Stokes equations. The flow around ciliated cells, however, exhibits finite-time vorticity diffusion, requiring a dynamical description. We present a model of elastic cilia coupled by unsteady viscous flow in the bulk fluid.
Albert von Kenne, Sonja Schmelter, Holger Stark, Markus Bär   +3 more
openalex   +3 more sources

Hydrodynamic Synchronization and Metachronal Waves on the Surface of the Colonial AlgaVolvox carteri [PDF]

Physical Review Letters, 2012
From unicellular ciliates to the respiratory epithelium, carpets of cilia display metachronal waves, long-wavelength phase modulations of the beating cycles, which theory suggests may arise from hydrodynamic coupling. Experiments have been limited by a lack of organisms suitable for systematic study of flagella and the flows they create.
Brumley, DR, Polin, M, Pedley, TJ, Goldstein, RE   +3 more
openaire   +5 more sources

A codimension-2 bifurcation controlling endogenous bursting activity and pulse-triggered responses of a neuron model. [PDF]

PLoS ONE, 2014
The dynamics of individual neurons are crucial for producing functional activity in neuronal networks. An open question is how temporal characteristics can be controlled in bursting activity and in transient neuronal responses to synaptic input ...
William H Barnett, Gennady S Cymbalyuk
doaj   +1 more source

Bioinspired Mechanisms and Actuation of Soft Robotic Crawlers

Advanced Science, Volume 12, Issue 16, April 24, 2025.
Researchers have been developing soft materials and robotic crawlers inspired by soft‐bodied animals to mimic effective crawling in complex environments. This review explores the state‐of‐the‐art in soft crawlers, highlighting the interaction between materials, crawling mechanisms, actuation, and applications. The review concludes by providing insights
Min Pan, Miaomiao Liu, Jiayi Lei, Yunyi Wang, Changhong Linghu, Chris Bowen, K. Jimmy Hsia   +6 more
wiley   +1 more source

Spontaneous Synchronization of Beating Cilia: An Experimental Proof Using Vision-Based Control

Fluids, 2018
This article investigates the formation of spontaneous coordination in a row of flexible 2D flaps (artificial cilia) in a chamber filled with a high viscous liquid (Re = 0.12). Each flap is driven individually to oscillate by a rotary motor with the root
Mohamed Elshalakani, Christoph H. Brücker   +1 more
doaj   +1 more source

Unicellular Organisms with Versatile Solutions at the Micro‐Scale: Functional Materials and Principles in Ciliates

Advanced Functional Materials, Volume 34, Issue 35, August 28, 2024.
Considering functional and structural materials and systems inspired by the principles of living nature, single‐celled organisms in particular are a promising model. The amazing bandwidth of different materials in ciliates ranges from nanostructured composites, over mineralized structures to self‐assembled protein structures.
Lennart Dörr, Jana Kohl, Michael Schweikert, Marie‐Louise Lemloh   +3 more
wiley   +1 more source

A Mathematical Model for the Flow of a Casson Fluid due to Metachronal Beating of Cilia in a Tube

The Scientific World Journal, Volume 2015, Issue 1, 2015., 2015
A mathematical model is developed to study the transport mechanism of a Casson fluid flow inspired by the metachronal coordination between the beating cilia in a cylindrical tube. A two‐dimensional system of nonlinear equations governing the flow problem is formulated by using axisymmetric cylindrical coordinates and then simplified by employing the ...
A. M. Siddiqui, A. A. Farooq, M. A. Rana, Abdelghani Bellouquid   +3 more
wiley   +1 more source

Flow assessment of the shear rate dependent viscoelastic fluid: Application of biomechanics in growing human embryo transport

Alexandria Engineering Journal, 2021
The present paper theoretically accords a biomechanical model with a brief biological and mathematical description of the growing embryo transport in the human fallopian tube.
H. Ashraf, A.M. Siddiqui, M.A. Rana, G.A. Gawo   +3 more
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