The edge states of two-dimensional time-reversal topological insulators support a perfect helical conductance on wide ribbons due to the absence backscattering. Here, we study changes in transport properties insulator nanoribbons by introducing constriction along ribbon. This setup allows hybridize, leading reflections at ends constriction. We find that electronic running one can be reflected b...

Estrogen regulation of myocardial chymase and chymase effects on cardiac remodeling are unknown. To test the hypothesis that estrogen prevents pressure overload-induced adverse cardiac remodeling by inhibiting mast cell (MC) chymase release, transverse aortic constriction or sham surgery was performed in 7-week-old intact and ovariectomized (OVX) rats. Three days before creating the constrictio...

Tosun M, Erac Y, Selli C, Karakaya N. Sarcoplasmic-endoplasmic reticulum Ca -ATPase inhibition prevents endothelin A receptor antagonism in rat aorta. Am J Physiol Heart Circ Physiol 292: H1961–H1966, 2007. First published December 15, 2006; doi:10.1152/ajpheart.00298.2006.—This study tested whether sarcoplasmic-endoplasmic reticulum Ca -ATPase regulates the ability of endothelin receptor antag...

Graphene kinks are topological states of buckled graphene membranes. We show that when a moving kink encounters constriction, there three general classes behavior: reflection, trapping, and transmission. Overall, constriction is characterized by an attractive potential. In the case simple symmetric potential energy has relatively deep minimum surrounded barriers. However, alone does not fully d...

In hypertension, pressure-induced myogenic constriction and impaired endothelium-derived hyperpolarizing factor (EDHF)-mediated dilation may contribute to increased vasomotor tone. Myogenic constriction as well as EDHF-mediated dilation may share common signaling mechanisms, and both may control KCa channel activity to set arterial tone. To investigate a potential relation between the 2 mechani...

This study tested whether sarcoplasmic-endoplasmic reticulum Ca(2+)-ATPase regulates the ability of endothelin receptor antagonist to inhibit the endothelin-1 constriction. The endothelin A receptor antagonist BQ-123 (1 microM) completely relaxed constriction to 10 nM endothelin-1 in endothelium-denuded rat aorta. Challenge with cyclopiazonic acid (10 microM), a sarcoplasmic-endoplasmic reticul...

OBJECTIVES In order to elucidate the influence of sympathetic nerves on lumbar radiculopathy, we investigated whether sympathectomy attenuated pain behaviour and altered the electrical properties of the dorsal root ganglion (DRG) neurons in a rat model of lumbar root constriction. METHODS Sprague-Dawley rats were divided into three experimental groups. In the root constriction group, the left...

We explore air invasion in an initially water-filled dead-end compliant microchannel containing a constriction. The phenomenon is driven by the pervaporation of liquid present channel through surrounding medium. penetration intermittent, jerky, and characterised stop-and-go dynamics as bubble escapes demonstrate that this sequence arrest jump due to elastocapillary coupling between air-liquid i...

Abstract The results of experimental studies and numerical simulation the flow structure in separation region downstream an asymmetric narrowing smooth canal that simulates 70% one-sided stenosis artery are presented. Reynolds number was equal to 1800. instantaneous velocity vector fields were measured using SIV technique. solution obtained by large eddy (LES) method. Setting disturbances close...