A5063732723- Titanium Alloys Microstructure and Properties
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Dental materials and restorations
- Orthopaedic implants and arthroplasty
- Semiconductor materials and devices
- Intermetallics and Advanced Alloy Properties
- Venous Thromboembolism Diagnosis and Management
- Semiconductor materials and interfaces
- Advanced machining processes and optimization
- Silicon Nanostructures and Photoluminescence
- Chemical Synthesis and Analysis
- Dental Implant Techniques and Outcomes
- Integrated Circuits and Semiconductor Failure Analysis
- Asymmetric Hydrogenation and Catalysis
- Peripheral Artery Disease Management
- Silicon and Solar Cell Technologies
- Electron and X-Ray Spectroscopy Techniques
- Blood properties and coagulation
- Boron and Carbon Nanomaterials Research
- Bone Tissue Engineering Materials
- X-ray Spectroscopy and Fluorescence Analysis
- Aluminum Alloys Composites Properties
- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
Tohoku University
2010-2024
Shinko Hospital
2015-2024
University of Hyogo
2022-2024
Tokyo University of Science
2015-2017
Osaka University
1999-2015
Kameda Medical Center
2015
Osaka Research Institute of Industrial Science and Technology
1991-2014
Tokyo University of Technology
2014
Japan Science and Technology Agency
2004-2014
Keio University
1979-2012
In this study, experimental Ti-Ag alloys (5, 10, and 20 mass% Ag) Ti-Cu (2, 5, 10 Cu) were made in an argon-arc melting furnace. The cast into magnesia molds using argon gas-pressure dental casting machine, the mechanical properties microstructures of castings investigated. As concentration silver or copper increased, tensile strength, yield hardness became higher than those CP Ti, elongation lower that Ti. Changes by alloying considered to be caused solid-solution strengthening a-phases...
An x-ray absorption fine-structure (XAFS) spectroscopy beamline, BL01B1, was installed at a bending magnet source SPring-8 and has been open to users since October 1997.It designed for XAFS experiments covering wide energy range.Position tables automatical control programs were established adjust the optics achieve performance of beamline under each experimental condition.This enabled conventional measurements be made with good data quality from 4.5 110 keV.
Experimental Ti-Ag alloys (5, 10, and 20 mass% Ag) Ti-Cu (2, 5, 10 Cu) were cast into magnesia molds using a dental casting machine, their grindability was investigated. At the lowest grinding speed (500 m min(-1)), there no statistical differences among values of titanium alloys. The increased as increased. highest (1500 x 20% Ag, 5% Cu, 10% Cu significantly higher than that titanium. It found alloying with silver or copper improved titanium, particularly at high speed. appeared decrease in...
The vitreous condition in retinitis pigmentosa, high myopia, peripheral uveitis, and Wagner's disease normal eyes was evaluated biomicroscopically documented photographically using a present lens (El Bayadi-Kajiura) 205 eyes. Compared with the control group, incidence of partial or complete detachment significantly higher all four clinical entities more frequently found disease, but not pigmentosa. A cottonball-like opacities and/or spindle-shaped condensations posterior near retina...
Polymethyl methacrylate (PMMA)-made prostheses used in the oral cavity were evaluated by multimodal assessment order to elucidate biodeterioration of PMMA. In dentures (UD), micro-Vickers hardness polished denture surface and basal was lower than that torn (p<0.05), whereas shaved approximately 100 µm from showed a similar value surface. By contrast, there no differences among these surfaces new resin (NR). The volatile content UD higher NR (p<0.05). Component analysis ATR-FTIR specific...
We developed a high-power abiotic direct glucose fuel cell system using Au–Pt bimetallic anode catalyst. The high power generation (95.7 mW cm–2) was attained by optimizing operating conditions such as the composition of catalyst, loading amount metal catalyst on carbon support, ionomer/carbon weight ratio when applied to anode, and KOH concentrations in solution, temperature flow rate solution. It found that poly(N-vinyl-2-pyrrolidone)-stabilized Au80Pt20 nanoparticles (mean diameter 1.5...
Aiming at developing a dental titanium alloy with better mechanical properties and machinability than unalloyed titanium, series of Ti-Nb alloys Nb concentrations up to 30% was made. They were cast into magnesia-based molds using casting machine the grindability castings examined. The hardness 5% above significantly higher that titanium. yield strength tensile 10% those while elongation lower. A small addition niobium did not contribute improving Ti-30%Nb exhibited low grinding speed...
This study aimed to fabricate a growth factor-releasing biodegradable scaffold for tissue regeneration. We prepared multishell calcium phosphate (CaP) nanoparticles functionalized with DNA, polyethyleneimine (PEI), protamine and octa-arginine (R8) compared their respective transfection activity cell viability measures using human mesenchymal stem cells. DNA-protamine complexes improved the efficiency of CaP exception those R8. These also greatly reduced cytotoxicity PEI. In addition, we...
Abstract Asymmetric hydrosilylation of simple ketones with diphenylsilane proceeded at -40 °C in the presence a rhodium complex (0.001—0.01 molar amount) coordinated trans-chelating chiral bisphosphine ligand bearing linear alkyl substituents on phosphorus atoms, (R,R)-(S,S)-Et-, Pr-, or BuTRAP, giving corresponding optically active (S)-secondary alcohols up to 97% ee. The asymmetric using TRAP ligands bulkier P-substituents resulted much lower enantioselectivities. EtTRAP-rhodium catalyst...
Anodic polarization was performed in 0.9% NaCl and 1% lactic acid solutions to characterize the relationship between corrosion behavior microstructures of cast Ti-Au (5-40%) alloys. An abrupt increase current density occurred at approximately 0.6V vs. SCE for 30% 40% Au alloys solution. The after testing indicated that this breakdown may have been caused by preferential dissolution Ti3Au. However, potential higher than stainless steel or Co-Cr alloy, which meant resistance superior. In...
Experimental Ti-Au alloys (5, 10, 20 and 40 mass% Au) were made. Mechanical properties grindability of the castings examined. As concentration gold increased to 20%, yield strength tensile became higher without markedly deteriorating their ductility. This can be explained by solid-solution strengthening a titanium. The Ti-40%Au alloy brittle because intermetallic compound Ti3Au precipitated intensively near grain boundaries. There was no significant difference in grinding rate ratio among...
The purpose of this study was to improve the grindability titanium by alloying with zirconium. dental cast Ti-Zr alloys (10, 20, 30, 40 and 50 mass% Zr) evaluated using a carborundum wheel. up 30 Zr formed an α structure, α′ structure. Ti-40 alloy at 1000 m/min Ti-50 1250 exhibited significantly higher than titanium. More twice volume metal removed from per minute. improved could be attributed structure in addition decrease elongation. alloys, which phase are candidates for use as machinable...
Titanium-silver (Ti-Ag) alloy has been improved for machinability and mechanical properties, but its anti-biofilm properties have not elucidated yet. Thus, this study aimed to evaluate the effects of Ti-Ag on biofilm formation bacterial viability in comparison with pure Ti, Ag silver-palladium (Ag-Pd) alloy. Biofilm metal plates was evaluated by growing Streptococcus mutans sobrinus presence plates. Bactericidal activity using a film contact method. There were no significant differences...
Abstract A micromixer based on a surface acoustic wave (SAW) has attracted great deal of attention because their ability to mix liquids and multiphase flows with very high mixing efficiency. However, since microfluidic channels cloud only be formed directly the piezoelectric substrate in conventional SAW devices, contamination problems have arisen. In this study, by placing solution that propagates sound waves between channel excitation substrate, vibrations caused SAWs are propagated into...
Anodic polarization tests were performed in 0.9% NaCl and 1% lactic acid solutions to characterize the relationship between corrosion behavior microstructures of cast Ti-Ag (5-40% Ag) alloys. The anodic curves for alloys up 17.5% Ag similar those pure titanium both solutions. On other hand, an abrupt increase current density was observed with more than 20% solution 27.5% solution. corroded alloy surfaces indicated deterioration precipitated intermetallic compounds along grain boundaries. had...
This study investigated the machinability of experimental Ti-Ag alloys (5, 10, 20, and 30 mass% Ag) as a new dental titanium alloy candidate for CAD/CAM use. The were slotted with vertical milling machine carbide square end mills under two cutting conditions. Machinability was evaluated through force using three-component transducer fixed on table machine. horizontal tended to decrease concentration silver increased. Values component perpendicular feed direction Ti-20%Ag Ti-30%Ag more than...