The elastic filament system in myogenesis

1999 ◽  
pp. 139-161 ◽  
Author(s):  
A. B. Fulton
Keyword(s):  
Filament System ◽  
Elastic Filament

The elastic filament system in myogenesis

1999 ◽  
Vol 138 (1) ◽  
pp. 139-161
Author(s):  
A. B. Fulton
Keyword(s):  
Filament System ◽  
Elastic Filament

scholarly journals Soft Matter Emerging Investigators Issue 2021 - "Propulsion of an elastic filament in a shear-thinning fluid at low Reynolds numbers"

Soft Matter ◽  
2021 ◽  
Author(s):  
Ke Qin ◽  
Zhiwei Peng ◽  
Ye Chen ◽  
Herve Nganguia ◽  
Lailai Zhu ◽  
...  
Keyword(s):  
Soft Matter ◽  
Reynolds Numbers ◽  
Shear Thinning ◽  
Low Reynolds Numbers ◽  
Elastic Filament ◽  
Low Reynolds ◽  
Micro Organisms ◽  
Surrounding Fluid ◽  
Shear Thinning Fluid ◽  
Flexible Appendages

Some micro-organisms and artificial micro-swimmers propel at low Reynolds numbers (Re) via the interaction of their flexible appendages with the surrounding fluid. While their locomotion have been extensively studied with...

Characterization of a novel filament system in goldfish xanthophores

1997 ◽  
Vol 36 (3) ◽  
pp. 216-227 ◽  
Author(s):  
Seu-Mei Wang ◽  
Jin-Shan Chen ◽  
Tsorng-Harn Fong ◽  
Shu-Yuan Hsu ◽  
Soo-Siang Lim
Keyword(s):  
Filament System

Biophysics of flagellar motility

1979 ◽  
Vol 12 (2) ◽  
pp. 103-180 ◽  
Author(s):  
Jacob J. Blum ◽  
Michael Hines
Keyword(s):  
Viscous Medium ◽  
Hydrodynamic Interactions ◽  
Eukaryotic Cells ◽  
Flagellar Motility ◽  
Muscle System ◽  
Structured Products ◽  
Filament System ◽  
Complex Organization ◽  
Propagating Waves ◽  
Sudden Appearance

One feature characterizing the transition from prokaryote to eukaryote is the ‘sudden’ appearance of centrioles and their highly structured products, the typical eukaryotic flagella and cilia. These mechanochemical systems appear as fully developed machines, containing some 200 diffierent proteins (Luck et al. 1978) arranged in a remarkably complex organization which has undergone little modification since the advent of the first eukaryotic cells. It is now well established (see, for example, Satir, 1974) that ciliary and flagellar motility is based on a sliding filament mechanism that superficially resembles the far more extensively studied sliding filament system of striated skeletal muscle.The flagellar system, however, appears to be much more complex than the muscle system, because it does not ‘merely’ shorten and generate force, but develops propagating waves and exerts its effects via hydrodynamic interactions with a viscous medium.

scholarly journals Effects of thermal noise on the transitional dynamics of an inextensible elastic filament in stagnation flow

Soft Matter ◽  
2015 ◽  
Vol 11 (24) ◽  
pp. 4962-4972 ◽  
Author(s):  
Mingge Deng ◽  
Leopold Grinberg ◽  
Bruce Caswell ◽  
George Em Karniadakis
Keyword(s):  
Partial Differential Equations ◽  
Stagnation Point ◽  
Stochastic Partial Differential Equations ◽  
Continuum Model ◽  
Thermal Noise ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
Stagnation Flow ◽  
Anisotropic Friction ◽  
Elastic Filament

We investigate the dynamics of a single inextensible elastic filament subject to anisotropic friction in a viscous stagnation-point flow, by employing both a continuum model represented by Langevin type stochastic partial differential equations (SPDEs) and a dissipative particle dynamics (DPD) method.

scholarly journals Microtubules soften due to cross-sectional flattening

eLife ◽  
2018 ◽  
Vol 7 ◽  
Author(s):  
Edvin Memet ◽  
Feodor Hilitski ◽  
Margaret A Morris ◽  
Walter J Schwenger ◽  
Zvonimir Dogic ◽  
...  
Keyword(s):  
High Strain ◽  
Three Dimensional ◽  
Elastic Model ◽  
Softening Effect ◽  
Cross Sectional ◽  
Mechanical Compliance ◽  
Wide Range ◽  
Elastic Filament ◽  
New Interpretation ◽  
Effective Mechanical Properties

We use optical trapping to continuously bend an isolated microtubule while simultaneously measuring the applied force and the resulting filament strain, thus allowing us to determine its elastic properties over a wide range of applied strains. We find that, while in the low-strain regime, microtubules may be quantitatively described in terms of the classical Euler-Bernoulli elastic filament, above a critical strain they deviate from this simple elastic model, showing a softening response with increasing deformations. A three-dimensional thin-shell model, in which the increased mechanical compliance is caused by flattening and eventual buckling of the filament cross-section, captures this softening effect in the high strain regime and yields quantitative values of the effective mechanical properties of microtubules. Our results demonstrate that properties of microtubules are highly dependent on the magnitude of the applied strain and offer a new interpretation for the large variety in microtubule mechanical data measured by different methods.

The presence or absence of a vimentin-type intermediate filament network affects the shape of the nucleus in human SW-13 cells

1994 ◽  
Vol 107 (6) ◽  
pp. 1593-1607 ◽  
Author(s):  
A.J. Sarria ◽  
J.G. Lieber ◽  
S.K. Nordeen ◽  
R.M. Evans
Keyword(s):  
Electron Microscopy ◽  
Intermediate Filament ◽  
Nuclear Morphology ◽  
Intermediate Filament Protein ◽  
Mosaic Pattern ◽  
Expression Plasmid ◽  
Vimentin Expression ◽  
Filament System ◽  
Filament Protein ◽  
Filament Network

Human SW-13 cells express the intermediate filament protein vimentin in a mosaic pattern (Hedberg, K. K. and Chen, L. B. (1986). Exp. Cell Res. 163, 509–517). We have isolated SW-13 clones that do (vim+) or do not (vim-) synthesize vimentin as analyzed using anti-intermediate filament immunofluorescence, electron microscopy and two-dimensional gel analysis of detergent-extracted preparations. Vimentin is the only cytoplasmic intermediate filament protein present in the vim+ cells, and the vim- cells do not contain any detectable cytoplasmic intermediate filament system. The presence or absence of intermediate filaments did not observably affect the distribution of mitochondria, endoplasmic reticulum, microtubules or actin stress fibers when these structures were visualized by fluorescence microscopy. However, electron microscopy and anti-lamin A/C immunofluorescence studies showed that nuclear morphology in vim- cells was frequently characterized by large folds or invaginations, while vim+ cells had a more regular or smooth nuclear shape. When vim- cells were transfected with a mouse vimentin expression plasmid, the synthesis of a mouse vimentin filament network restored the smooth nuclear morphology characteristic of vim+ cells. Conversely, when vim+ cells were transfected with a carboxy-terminally truncated mutant vimentin, expression of the mutant protein disrupted the organization of the endogenous vimentin filaments and resulted in nuclei with a prominently invaginated morphology. These results indicated that in SW-13 cells the vimentin filament system affects the shape of the nucleus.

Two Energy-release Processes Observed in the Eruption of a Confined Filament System

2018 ◽  
Vol 130 (994) ◽  
pp. 124401 ◽  
Author(s):  
Hongbo Li ◽  
Yu Liu ◽  
Jihong Liu ◽  
A. Elmhamdi ◽  
A.-S. Kordi
Keyword(s):  
Energy Release ◽  
Filament System ◽  
Release Processes

Changes of the actin filament system in the green algaMicrasterias denticulata induced by different cytoskeleton inhibitors

PROTOPLASMA ◽  
2000 ◽  
Vol 212 (3-4) ◽  
pp. 206-216 ◽  
Author(s):  
M. Pfl�gl-Haill ◽  
L. Vidali ◽  
J. W. Vos ◽  
P. K. Hepler ◽  
U. L�tz-Meindl
Keyword(s):  
Actin Filament ◽  
Filament System
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