Quenching of tris(2,2'-bipyridine)ruthenium(II) (Ru(bpy)32+) ionically bound to porous Vycor glass by oxygen, nitrous oxide, and sulfur dioxide

1983 ◽  
Vol 87 (26) ◽  
pp. 5395-5401 ◽  
Author(s):  
Steven Wolfgang ◽  
Harry D. Gafney
Keyword(s):  
Nitrous Oxide ◽  
Sulfur Dioxide ◽  
Vycor Glass ◽  
Porous Vycor Glass ◽  
Oxygen Nitrous Oxide

Measurement of surface self-diffusion of sulfur dioxide on porous vycor glass by radioisotope tracer method

AIChE Journal ◽  
1981 ◽  
Vol 27 (6) ◽  
pp. 1035-1038 ◽  
Author(s):  
Morio Okazaki ◽  
Hajime Tamon ◽  
Tomoyoshi Hyodo ◽  
Ryozo Toei
Keyword(s):  
Sulfur Dioxide ◽  
Tracer Method ◽  
Vycor Glass ◽  
Self Diffusion ◽  
Porous Vycor Glass ◽  
Radioisotope Tracer

scholarly journals Chronic pain relief after the exposure of nitrous oxide during dental treatment: longitudinal retrospective study

2015 ◽  
Vol 73 (7) ◽  
pp. 578-581 ◽  
Author(s):  
Francisco Moreira Mattos Júnior ◽  
Rafael Villanova Mattos ◽  
Manoel Jacobsen Teixeira ◽  
Silvia Regina Dowgan Tesseroli de Siqueira ◽  
Jose Tadeu Tesseroli de Siqueira
Keyword(s):  
Chronic Pain ◽  
Nitrous Oxide ◽  
Dental Treatment ◽  
Chronic Pain Patients ◽  
Before And After ◽  
Nitrous Oxide Oxygen ◽  
Oxygen Nitrous Oxide ◽  
Prevalence Of Pain ◽  
Underlying Mechanisms ◽  
Pain Patients

The objective was to investigate the effect of nitrous/oxygen in chronic pain. Seventy-seven chronic pain patients referred to dental treatment with conscious sedation with nitrous oxide/oxygen had their records included in this research. Data were collected regarding the location and intensity of pain by the visual analogue scale before and after the treatment. Statistical analysis was performed comparing pre- and post-treatment findings. It was observed a remarkable decrease in the prevalence of pain in this sample (only 18 patients still had chronic pain, p < 0.001) and in its intensity (p < 0.001). Patients that needed fewer sessions received higher proportions of nitrous oxide/oxygen. Nitrous oxide may be a tool to be used in the treatment of chronic pain, and future prospective studies are necessary to understand the underlying mechanisms and the effect of nitrous oxide/oxygen in patients according to the pain diagnosis and other characteristics.

scholarly journals Thermal properties of metal-metal bonded Pd(I) complexes supported onto porous Vycor glass

2008 ◽  
Vol 80 (2) ◽  
pp. 263-269
Author(s):  
Iara F. Gimenez ◽  
Oswaldo L. Alves
Keyword(s):  
Solid State ◽  
Thermal Stabilization ◽  
Decomposition Products ◽  
Vycor Glass ◽  
X Ray ◽  
Porous Vycor Glass ◽  
Metal Metal ◽  
Condensed Phosphates ◽  
Diffuse Reflectance Infrared ◽  
Immobilized Complexes

Thermal behavior of the complexes Pd2(dppm)2Cl2, Pd2(dppm)2(SnCl3)Cl and Pd2(dppm)2(SnCl3)2 (dppm = bis[diphenylphosphino(methane)], ((C6H5)2PCH2P(C6H5)2) in the solid state and immobilized onto porous Vycor glass was studied. Similar decomposition mechanisms were observed for the solid and immobilized complexes, with a small thermal stabilization upon immobilization. The decomposition products were characterized by X-ray diffractometry, Raman and diffuse reflectance infrared spectroscopy, which indicated the presence of a mixture of metallic palladium and oxidized species such as PdO,condensed phosphates, SnO2 and SnP2O7. According to X-ray diffractometry, the decomposition products of the immobilized complexes presented higher amounts of PdO than the solid-state residues, probably as an effect of interactions with silanol groups present in the glass surface.

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