[Exogenous hydrogen sulfide attenuates gastric ischemia-reperfusion injury via activation of K(ATP) channel].

The present study aimed to investigate the protective effect and mechanism of hydrogen sulfide donor NaHS administration against gastric mucosal injury induced by gastric ischemia-reperfusion (GI-R) in rats. GI-R injury was induced by clamping the celiac artery of adult male SD rats for 30 min and followed by reperfusion for 1 h. The rats were randomly divided into sham group, GI-R group, NaHS group, glibenclamide group and pinacidil group.

Optical waveguides in Nd:GGG crystals produced by H+ or C3+ ion implantation.

The optical waveguides in neodymium-doped gadolinium gallium garnet crystal are fabricated, to our knowledge for the first time, by either H(+) or C(3+) ion implantation. The reconstructed refractive index profiles of the planar waveguides have shown, in both cases, the typical "enhanced well" + "barrier" distributions. The two-dimensional modal profiles of the channel waveguides, obtained by using an end-face coupling arrangement, are in good agreement with the simulated modal distributions.

Ion-implanted optical-stripe waveguides in neodymium-doped calcium barium niobate crystals.

We report on the fabrication and characterization of optical-stripe waveguides in neodymium-doped calcium barium niobate (Nd:CBN) crystals by using He ion implantation assisted with a mask. The guided-mode profiles are successfully modeled through numerical simulations. After annealing at 200 degrees C for 30 min, the waveguide propagation loss could be reduced down to ~3 dB/cm.

Annealing effect on mono-mode refractive index enhanced RbTiOPO4 waveguides formed by ion implantation.

We reported on the annealing features of the RbTiOPO4 planar waveguides fabricated by 6.0 MeV C3+ ion implantation. The thermal stability of the ion-implanted RbTiOPO4 waveguide was investigated by annealing at different temperatures ranging from 260 degrees C to 650 degrees C.

Ion exchange in KTiOPO4 crystals irradiated by copper and hydrogen ions.

Cs(+)-K+ ion exchanges were produced on KTiOPO4 crystals which is prior irradiated by Cu+ can H+ ions. The energy and dose of implanted Cu+ ions are 1.5 MeV and 0.

2,4,6-Trimethyl-1,3,5-tris-(morpholino-meth-yl)benzene.

In the title compound, C(24)H(39)N(3)O(3), the H atoms of the methyl groups are disordered over two positions, with site-occupation factors fixed at 0.5. The three morpholino groups are arranged in an asymmetrical fashion with respect to the anchoring mesitylene ring and adopt chair conformations.

1,3,5-Tris{[3-(1H-benzotriazol-1-ylmeth-yl)phen-oxy]meth-yl}-2,4,6-trimethyl-benzene.

In the title compound, C(51)H(45)N(9)O(3), three 1-(1H-benzotriazol-1-ylmeth-yl)-3-phen-yloxy (bmph) ligands are bonded to the central benzene ring in an asymmetric arrangement, two bmph located on one side of the central benzene ring and the other bmph located on the opposite side of the central benzene ring. The dihedral angles between the central benzene ring and the three pendant phenoxy rings are 76.71 (14), 67.

Lithium niobate channel waveguide at optical communication wavelength formed by multienergy implantation.

Channel waveguides at 1540 nm in X- and Z-cut LiNbO3 are formed by one-step multienergy MeV O2+ implantation. Single perpendicular mode in both planar and channel waveguides is demonstrated. In the ne channel waveguide, double transverse modes are observed because of the large index difference and broad width of the channel.

Investigation and analysis of a single-mode waveguide formed by multienergy-implanted LiNbO3.

We demonstrate a single-mode waveguide in LiNbO3 by use of both prism and end-face coupling methods. The waveguide is formed by multienergy megaelectron-volt O2+ implantation at room temperature. A bright line is observed only when moderate postimplant annealing was performed.

Optical planar waveguide fabricated in Nd:LuVO4 crystal by MeV oxygen implantation.

We report the first time optical planar waveguide fabricated in vanadate laser crystal Nd:LuVO4 by 3.0 MeV oxygen ion implantation with the dose of 6x1014 ions/cm2 at room temperature. After the implantation, an enhanced ordinary refractive index region was formed with a width of about 2.

Low propagation loss of the waveguides in fused quartz by oxygen ion implantation: errata.

The calculated data of propagation loss of the waveguide were incorrect. Corrected data show the actual results in the measurements.

Low propagation loss of the waveguides in fused quartz by oxygen ion implantation.

The planar waveguides have been fabricated in fused quartz by 3.0 MeV oxygen ion implantation at dose of 1x10;15 ions/cm2. The guiding modes were observed at wavelengths of both 633 nm and 1539 nm before and after annealing at 320 masculineC, 450 masculineC and 500 masculineC in 60 min characterized by the prism-coupling method.

Monomode optical waveguide excited at 1540 nm in LiNbO(3) formed by MeV carbon ion implantation at low doses.

The monomode enhanced-index LiNbO(3) waveguide excited at 1540 nm is reported. X-cut LiNbO(3) crystals were implanted at room temperature by 6.0 MeV C(3+) ions with a dose of 2.