Adsorption Separation of Binary Gas Mixtures with Activated Carbon II. The concentrated Gas Mixture

application/pdfBulletin of University of Osaka Prefecture. Series A, Engineering and natural sciences. 1959, 8(1), p.117-126departmental bulletin pape

Adsorption Separation of Binary Gas Mixtures with Activated Carbon I. The dilute Gas Mixture

application/pdfBulletin of University of Osaka Prefecture. Series A, Engineering and natural sciences. 1959, 8(1), p.109-115departmental bulletin pape

Adsorption Separation of Binary Gas Mixtures with Activated Carbon IV Effect of Species of Carbon

application/pdfBulletin of University of Osaka Prefecture. Series A, Engineering and natural sciences. 1973, 22(1), p.69-75departmental bulletin pape

Adsorption Separation of Binary Gas Mixtures with Molecular Sieve

ArticleBulletin of University of Osaka Prefecture. Series A, Engineering and natural sciences. 1973, 22(1), p.77-82departmental bulletin pape

Infrared Spectra of Urea and Thiourea Thin Films on the Metal Surface

The infrared spectra of thin urea and thiourea films, several hundred Angstroms thick, on a steel plate were obtained using an optical system in which the beam polarized parallel to the plane of incidence was incident at 70° upon a steel plate covered with film. The spectra obtained showed that the c-axis of the urea crystal was parallel to the metal surface. However, the abnormal behavior of the NH_2 bending and the NH_2 twisting bands suggests that the urea molecule in the film was deformed from the planar structure. The intensities of the infrared bands of thiourea belonging to the B_1 species decreased in the film, and it may be concluded that the c-axis of the crystal is nearly parallel to the metal surface. The considerable rise in frequency of the NH_2 wagging band observed in the thin thiourea film may arise from the deformation of the crystal. As for the thiourea-collodion film, thiourea A_1 bands appeared to be very weak, corresponding to the C=S bond orientation parallel to the metal surface. The dichroism of the thiourea bands in the 3μ region obtained about the thiourea and thiourea-collodion thin films is in agreement with the Badger-Waldron assignment of the absorption bands

Far Infra-Red Absorption Spectra of Ferric Oxides and Oxyhydroxides

Far infra-red spectroscopy is believed to be a very powerful tool for identifying metallic compounds and studying their structures. Ferric oxides and oxyhydroxides are important corrosion products of iron alloys, but their far infra-red spectra have never been reported. For this reason, the far infra-red spectra of α-, β- and γ-FeOOH and α- and γ-Fe_2O_3 were observed in the region of 25～220μ. In addition, the diffuse reflection spectra of these compounds were measured, since diffuse reflection spectroscopy may also be a convenient method for identification of the compounds. The measurement of the far infra-red spectra of powdered samples was carried out using a JASCO DS-501 G grating far infra-red spectrophotometer. Fine powderes of the compounds were dispersed in MgO, and the diffuse reflection spectra of the dispersed samples were observed over the region of 240～1100mμ. It has been observed that the compounds show the characteristic absorption bands in the far infra-red region. The measurement of far infra-red spectra has proved to be an excellent method for identifying these compounds. An absorption band at 286 cm^ of α-FeOOH and those at 266cm^ of β- and γ-FeOOH are assigned tentatively to be the absorption due to the out of plane deformation vibration of the -O-H group. The results also show characteristic absorption curves for each compound in the diffuse reflection spectra, indicating the applicability of diffuse reflection spectroscopy for the said purpose

Formation of Fe(II)_1-Fe(III)_3 Green Complex on Oxidation of Ferrous Ion in Perchloric Acid Solution

The interaction between Fe(II)-Fe(III) in strong acidic solution has been investigated by means of electronic and Raman spectra, magnetic susceptibility measurement and chemical analysis of the solution. It was found that the green intermediate complex having an absorption band at 337 nm was formed on oxidation of Fe(H_2O)^_6 in perchloric acid solution. The Fe(II)/Fe(III) ratio in the green complex was a third. The configuration of the complex consisting of Fe(II)-O-Fe(III) oxo-bridges was suggested

The Absorption Spectra of Thiourea and Potassium Iodide on Nickel Metal

The absorption spectra of thiourea molecules adsorbed on nickel surfaces in acid aqueous solutions have been observed by means of reflection cells. A new band did not appear in the observed region, but the intensity of the absorption band at 236mμ decreased remarkably. The absorption spectra of potassium iodide have also been observed with reflection cells. For acidic solutions an absorption band at 226mμ decreased in intensity and a new band appeared at 310mμ, while for the solutions in pure water no change in the spectrum has been observed. The observed results have been discussed and a hypothesis of surface complex formation presented

Rupture of Internal carotid artery pseudoaneurysm in the sphenoid sinus as a complication of deep neck space infection

Background : Pseudoaneurysm of the internal carotid artery (ICA) is a very rare but potentially fatal complication of deep neck space infection. Methods : This paper describes a very rare case of an ICA pseudoaneurysm rupture in the sphenoid sinus caused by a deep neck abscess. Results : A 62-year-old male with a deep neck space infection underwent surgical drainage. On the postoperative 21st day, however, he suddenly had massive epistaxis. A transnasal endoscopic examination found massive bleeding out of the sphenoid sinus. Immediate intra-arterial angiography revealed two pseudoaneurysms of the left ICA at the cavernous segment (C4) and the clinoid segment (C5), which were embolized with coils. The patient made an uneventful recovery after the embolization. Conclusion : We found no reports in the literature that pseudoaneurysms associated with a deep neck infection rupture in the sphenoid sinus. Prompt treatment along with accurate diagnosis is essential for successful management of such cases

Surface Bond between Organic Corrosion Inhibitors and Metal Surfaces

The delocalization energy in the surface bond formation is estimated by the method proposed by Grimley, using a linear crystal model and the "tight-binding" approximation. The change of the energy with the electronegativity of a foreign atom and a surface metal atom is discussed. The change of polarization of electrolytic iron and pure nickel by the addition of an inhibitor in dilute mineral acids is in general agreement with the theoretical deduction attained on the assumption that the surface bond is formed by over-lapping of a lone pair electron orbital of an inhibitor molecule and a vacant orbital of a surface metal atom