Results 1 to 10 of about 5,755 (75)

Model of inverse bleb growth explains giant vacuole dynamics during cell mechanoadaptation [PDF]

, 2022
Cells can withstand hostile environmental conditions manifest as large mechanical forces such as pressure gradients and/or shear stresses by dynamically changing their shape. Such conditions are realized in the Schlemm's canal of the eye where endothelial cells that cover the inner vessel wall are subjected to the hydrodynamic pressure gradients ...
arxiv   +1 more source

Synchrotron radiation microtomography of brain hemisphere and spinal cord of a mouse model of multiple sclerosis revealed a correlation between capillary dilation and clinical score [PDF]

J. Comp. Neurol. (2019), 2018
Multiple sclerosis is a neurological disorder in which the myelin sheaths of axons are damaged by the immune response. We report here a three-dimensional structural analysis of brain and spinal cord tissues of a mouse model of multiple sclerosis, known as experimental autoimmune encephalomyelitis (EAE).
arxiv   +1 more source

Influence of Electromagnetic Field on Hyperbolically Symmetric Source [PDF]

Eur. Phys. J. Plus 136, 857 (2021), 2021
We pursue a coherent analysis of hyperbolically symmetric static sources by extending the work of Herrera \cite{26} to the case of electromagnetic field. We deeply analyze the impact of such a force on the physical characteristics of the hyperbolically symmetric spacetime under consideration.
arxiv   +1 more source

Is the cluster of galaxies "Abell 194" surrounded by an Einstein-Straus vacuole? [PDF]

Astron.Astrophys. 440 (2005) L41-L43, 2005
It is suggested that an ``Einstein-Straus vacuole'' -- a region of space time with a metric obtained by solving the equations of general relativity of a mass condensation in an expanding universe with vanishing cosmological constant -- surrounds the cluster of galaxies ``Abell 194''.
arxiv   +1 more source

The Vacuole Model: New Terms in the Second Order Deflection of Light [PDF]

JCAP 1102:028,2011, 2010
The present paper is an extension of a recent work (Bhattacharya et al. 2010) to the Einstein-Strauss vacuole model with a cosmological constant, where we work out the light deflection by considering perturbations up to order M^3 and confirm the light bending obtained previously in their vacuole model by Ishak et al. (2008).
arxiv   +1 more source

The riddle of the plant vacuolar sorting receptors [PDF]

Protoplasma 226 (12/2005) 103-8, 2006
Proteins synthesized on membrane-bound ribosomes are sorted at the Golgi apparatus level for delivery to various cellular destinations: the plasma membrane or the extracellular space, and the lytic vacuole or lysosome. Sorting involves the assembly of vesicles, which preferentially package soluble proteins with a common destination.
arxiv   +1 more source

Is gravitational collapse possible in $f(R)$ gravity? [PDF]

Phys. Rev. D 105, 084060 (2022), 2022
Gravitational collapse is still poorly understood in the context of $f(R)$ theories of gravity, since the Oppenheimer-Snyder model is incompatible with their junction conditions. In this work, we will present a systematic approach to the problem. Starting with a thorough analysis of how the Oppenheimer-Snyder construction should be generalised to fit ...
arxiv   +1 more source

More on Lensing by a Cosmological Constant [PDF]

Mon.Not.Roy.Astron.Soc. 403:2152-2156,2010, 2008
The question of whether or not the cosmological constant affects the bending of light around a concentrated mass has been the subject of some recent papers. We present here a simple, specific and transparent example where $\Lambda$ bending clearly takes place, and where it is clearly neither a coordinate effect nor an aberration effect.
arxiv   +1 more source

Cytoplasmic streaming in plant cells: the role of wall slip [PDF]

J. R. Soc. Interface 2012 9, 1398-1408, 2012
We present a computer simulation study, via lattice Boltzmann simulations, of a microscopic model for cytoplasmic streaming in algal cells such as those of Chara corallina. We modelled myosin motors tracking along actin lanes as spheres undergoing directed motion along fixed lines.
arxiv   +1 more source

Bondi accretion onto cosmological black holes [PDF]

Phys. Rev. D15, vol. 87, 04400(2013), 2012
In this paper we investigate a steady accretion within the Einstein-Straus vacuole, in the presence of the cosmological constant. The dark energy damps the mass accretion rate and --- above certain limit --- completely stops the steady accretion onto black holes, which in particular is prohibited in the inflation era and after (roughly) $10^{12}$ years
arxiv   +1 more source