Increased fluorescence intensity in CaTiO3:Pr3+ phosphor due to NH3 treatment and Nb Co-doping

Dy phosphor by Yb ions doping

The modification effect of the doping of Yb ions, as an auxiliary activator, onto the luminescent properties of SrAl2O4:Eu , Dy phosphor was studied for the first time. The phosphorescent nanoparticles were prepared by the combustion method. The experimental results indicate that the appropriate doping of Yb ions largely improves phosphorescence of the phosphors with more intense luminescence, ...

Treatment of nonlinear optical properties due to large amplitude anharmonic vibrational motions: umbrella motion in NH3.

A general reduced dimensionality finite field nuclear relaxation method for calculating vibrational nonlinear optical properties of molecules with large contributions due to anharmonic motions is introduced. In an initial application to the umbrella (inversion) motion of NH(3) it is found that difficulties associated with a conventional single well treatment are overcome and that the particular...

fluoride and dental fluorosis and treatment

چکیده ندارد.

Crystal structure of [Co(NH3)6][Co(CO)4]2

Hexaamminecobalt(II) bis-[tetra-carbonyl-cobaltate(-I)], [Co(NH3)6][Co(CO)4]2, was synthesized by reaction of liquid ammonia with Co2(CO)8. The Co(II) atom is coordinated by six ammine ligands. The resulting polyhedron, the hexa-amminecobalt(II) cation, exhibits point group symmetry -3. The Co(-I) atom is coordinated by four carbonyl ligands, leading to a tetra-carbonyl-cobaltate(-I) anion in t...

Spontaneous Rupture of Uterus in Midtrimester Pregnancy Due to Increased Uterine Pressure with PreviousLaparoscopic Myomectomy