Hypertensive vasomotor dysfunction is defined by endothelium-dependent contractions involving prostaglandins and ROS. Since both thromboxane-prostanoid receptor (TPr) signaling and ROS activate RhoA-Rho kinase (ROCK) in vascular smooth muscle (VSM) preparations, we hypothesized that enhanced endothelium-dependent contraction in the common carotid artery (CCA) of spontaneously hypertensive rats ...

a r t i c l e i n f o The purpose of this study is to investigate the role of filling materials (e.g., quartz sand and kaolin clay) in the interaction between a P-wave and a rock fracture. The specific fracture stiffness reflects the seismic response of a filled fracture, while the wave transmission coefficient describes P-wave transmission across the filled fracture. A series of experimental t...

The relationship between the rock’s elastic modulus and deformation characteristics, affected by joint spacing ductility, was not determined. This study investigates size effect of rock with parallel joints using numerical simulation regression analysis. results showed an exponential a negative size. characteristic has power function spacing, spacing. general specific forms these relationships ...

The rockburst phenomenon occurs in dry red sandstone under high situ stress, and the effect is weaker for a water-bearing rock. on with different water contents analyzed this paper. A true triaxial testing machine used to conduct loading, acoustic emission recording equipment high-speed camera are monitor signal inside rock rock-caving situation throughout entire process order analyze character...

Rock burst is easy to occur in the water-rich roadway of coal mines, which closely related energy dissipation and fracture mechanism rocks under coupled hydro-mechanical (H-M) unloading. Therefore, combination with triaxial loading unloading process H-M coupling effect, mechanical test layered sandstones (TLUTP) was conducted. The were revealed. results show that: (1) influence angles on peak v...

Auger and X-ray photoelectron spectroscopies have been used to study the surface composition of MnxCo1−xO (0 ≤ x ≤ 1) solid solutions. The polycrystalline materials, which are bulk homogeneous, present clear signs of deviation in surface composition at xbulk ≈ 0.2–0.4 to become surface-enriched in manganese at the expense of the cobalt. Whether on stoichiometric or cobalt-depleted surfaces, cob...

Once segmentation of 3D surface data of a rock pile has been performed, the next task is to determine the visibility of the surface rocks. A region boundary-following algorithm that accommodates irregularly spaced 3D coordinate data is presented for determining this visibility. We examine 3D surface segmentations of laboratory rock piles and determine which regions in the segmentation correspon...