木材の割裂破壊耐力推定のための基礎的研究

学位の種別: 課程博士審査委員会委員 : （主査）東京大学教授 稲山 正弘, 東京大学准教授 青木 謙治, 東京大学教授 信田 聡, 東京大学准教授 恒次 祐子, 関東学院大学専任講師 神戸 渡University of Tokyo(東京大学

ICAR: endoscopic skull‐base surgery

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Low-Temperature Synthesis of Cu-Doped Anatase TiO₂ Nanostructures via Liquid Phase Deposition Method for Enhanced Photocatalysis

Titanium dioxide (TiO2) photocatalysis can harness the energy from sunlight, providing a solution to many green- and energy-related problems. In this study, we aimed to produce Cu doped TiO2 (Cu-TiO2) structures at a low temperature (~70 °C) under atmospheric pressure based on liquid phase deposition. The products prepared with Cu nitrate exhibited anatase-phase TiO2 with the presence of Cu, and the particles showed a waxberry-like structure. Changing the Cu nitrate concentration allowed control of the atomic concentration; we confirmed ~1.3 atm.% of Cu ions in the product when we applied 10 mM in the precursor solution. By doping Cu, the light absorption edge shifted to 440 nm (~2.9 eV), and we proved the photocatalytic reaction through action spectral measurement. We observed the decomposition of acetaldehyde into CO2 on Cu-TiO2 photocatalysts, which produced optimized improvements in photocatalytic activity at Cu dopant levels between 0.2 and 0.4 atm.%. This study demonstrates that the liquid phase deposition technique can be used for doping metallic ions into TiO2, which shows promise for preparing novel and unique nanomaterials as visible light photocatalysts

Cholesterol Granuloma of the Orbit. Report of Cases and Analysis of Controversial Treatment

Cholesterol granuloma of the orbit is a rare entity originated from a foreign body reaction against cholesterol crystal. Its pathogenesis still remains unclear, while controversy is still present concerning its management. In the present report, two new cases of cholesterol granuloma of the orbit are presented and the authors focus on treatment considerations