نتایج جستجو برای: junctions
تعداد نتایج: 30514 فیلتر نتایج به سال:
Lens epithelial cells communicate with two different cell types. They communicate with other epithelial cells via gap junctions on their lateral membranes, and with fiber cells via junctions on their apices. We tested independently these two routes of cellcell communica t ion to determine if t reatment with a 90% CO2-equilibrated medium caused a decrease in junctional permeability; the transfer...
We study the origin of subharmonic synchronization in arrays consisting of few over-damped Josephson junctions. We show that for asymmetric arrays, the evolution equations contain second (or higher) order derivatives or non-sinusoidal terms, both leading to fractional Shapiro steps in presence of external ac drive .
sertoli cells are an essential group of cells in seminiferous epithelium which provide nutritional and structural supports for spermatogenic cells via cell junctions. in this study, the gene expression of connexin-43, the most abundantly distributed gap junction protein of cells, was investigated in ram sertoli cells under mild and severe heat stresses with real-time quantitative pcr. sertoli c...
Vascular endothelial growth factor (VEGF) and Ang1 (Angiopoietin-1) have opposing effects on vascular permeability, but the molecular basis of these effects is not fully known. We report in this paper that VEGF and Ang1 regulate endothelial cell (EC) junctions by determining the localization of the RhoA-specific guanine nucleotide exchange factor Syx. Syx was recruited to junctions by members o...
Direct electron-beam irradiation of high-Tc thin films has been used to create closely spaced Josephson junctions which operate at temperatures of 60-80 K. The electrodynamics of two junctions have been investigated by studying the dependence of the critical current on an applied magnetic field. The junctions spaced between 50 and 150 nm could be measured independently by using a narrow third e...
Temporary junctions were observed between developing optic fibers of the chick embryo and were distributed along the entire length of the axons from the cell body to the tip of the growth cone. These junctions were present in all material studied between days E-3 and E-18, the latter being the start of myelin formation of the optic tract. Junctions between adjacent axons were focal in nature an...
Understanding current-induced bond rupture in single-molecule junctions is both of fundamental interest and a prerequisite for the design molecular junctions, which are stable at higher bias voltages. In this work, we use fully quantum mechanical method based on hierarchical master equation approach to analyze dissociation mechanisms junctions. Considering wide range transport regimes, from off...
The connexin family of proteins (Cx) that form intercellular gap junctions in vertebrates is well represented in the mammalian central nervous system. Among these, Cx30 and Cx43 are present in gap junctions of astrocytes. Cx32 is expressed by oligodendrocytes and is present in heterologous gap junctions between oligodendrocytes and astrocytes as well as at autologous gap junctions between succe...
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