Toru Nonami

© 2017 Trans Tech Publications, Switzerland. In this study, a novel titania-supported spherical porous hydroxyapatite (sHAp + TiO2) was prepared by compounding minute, uniquely shaped spherical porous hydroxyapatites (sHAp) with TiO2. Adsorption o...

This study pertains to the adsorption of radioactive substances (caesium and iodine) by mesoporous carbon compounds derived from bamboo (bamboo charcoal). We prepared bamboo charcoals by heat treatment, to investigating the adsorption characterist...

We examined the apatite precipitate ability of CaO-MgO-SiO 2 compounders. Synthesized materials were Diopside, Akermanite, Pseudowollastonite, Forsterite and Protoenstatite. Materials were synthesized with solid solution me...

We developed the porous Hydroxyapatite particle by wet method. The synthesis condition to make the spherical and porous Hydroxyapatite was examined. To synthesize the Hydroxyapatite, phosphorus and calcium were dissolved in water and the solution ...

Diopside has ability of repair for incipient dentin caries because apatite is decomposed on the surface. The synthesized Diopside,akermanite and pseudowollastonite soaked calcium free pseudo body fluid (PBF) and distilled water (DW). It was added ...

This study sought to decrease dishing and erosion as they cause reduced yield in copper chemical mechanical polishing (Cu-CMP), which is a multilayer interconnect process that is a part of the overall semiconductor manufacturing process. We prepar...

本研究は,アパタイト被覆酸化チタン光触媒コーティングが運動による発汗後のウェア臭気に及ぼす影響について検討した.被検者は,健康な成人男性8名とし,アパタイト被覆酸化チタン光触媒をコーティング加工したウェアを着用する条件(光触媒ウェア条件)とコーティング加工しないウェアを着用する条件(通常ウェア条件)で,温熱運動負荷実験を実施した.各条件における実験手順は,被検者に高温多湿環境条件下(室温30℃,相対湿度70%)で60%HRmaxの強度のトレッドミル走を20分間行わせ,その後30分間座位安静...

When investigating of vital tooth bleaching, it is considered difficult to simply apply a clinical result as an index for evaluating the bleaching effect, because of individual variations as well as varied staining substances and degrees of staini...

義歯の清掃は口腔衛生の維持に重要であり、高齢者や要介護者とって容易ではない。より安全で簡便な義歯の清掃法の確立を目的として、光触媒である二酸化チタンを義歯床用レジンに配合し検討を行った。本研究では、義歯床用レジンに二酸化チタン(Ti)およびアパタイト被覆型二酸化チタン(AP)を1・5・10重量%の割合で配合して試験片を作製、紫外線照射と非照射による色調の変化ならびに物性試験、表面性状について評価を行った。その結果、色調の変化では、色差はTi・AP共に光触媒反応により急激に増大を示した。その...

An acid resistant fluoroapatite coated titanium dioxide (FAp-TiO_2) was synthesized by adding a fluoride ion (F^-) to hydroxyapatite (HAp), in order to avoid dissolution of the HAp at an acidic atmosphere. In this study, the optimization of synthe...

The simplification of the cleaning process of plastic containers used in the storage and/or distribution of fruits or vegetables is important. We coated a plastic container with an apatite-coated titanium dioxide photocatalyst (TiO2-Ap container),...

An acid resistant fluoroapatite (FAp) coated titanium dioxide (TiO_2) was synthesized by adding a fluoride ion (F^-) to hydroxyapatite (HAp), in order to avoid dissolution of the HAp at an acidic atmosphere. In this study, different methods of add...

In the present study, Pt, NiO, and RuO2fine particles as co-catalyst were loaded on the LiInO2surface by different methods for enhancing its adsorption capability and photocatalytic activity for methylene blue dye (MB) decomposition. Clear adsorpt...

Two kinds of dispersed nanoparticle photocatalysts of antimonic acid, HSbO3·nH2O, namely, SbI and SbII, were prepared separately by the direct reactions of an aqueous H2O2solution with Sb alkoxide complex, Sb(O-i-C3H7)3and metallic Sb powder accor...

Hydroxyapatite (HAp) was crystallized on anatase titanium dioxide (TiO 2) photocatalytic crystals or their thin films using of a pseudo-body solution method, and electrochemical properties of the HAp-adhered anatase TiO2 photocatalytic surfaces we...

This paper examines whether a polishing pad with abrasive grain can be adapted for oxide CMP (ILD CMP and STI CMP), which is currently performed by free abrasive polishing. Using the Loosely Held Abrasive (LHA) pad that is effective in the polishi...

An acid resistant fluoroapatite (FAp) coated titanium dioxide (TiO2) was synthesized by adding a fluoride ion (F-) to hydroxyapatite (HAp), in order to avoid dissolution of the HAp at an acidic atmosphere. In this study, different methods of addin...

On the hydroxyapatite/titanium alloy composite disks, the normal human osteoblast cells were cultured. As a result, the samples were covered with normal human osteoblast cells after 2 hours. Moreover, we did not observe cracks in any of the HA gra...

アルミハードディスク基板は, 磁気ヘッドと磁気ディスク基板上の磁性体を円周方向に揃えるために, ほぼ同心円状の微小な傷を入れる加工であるテクスチャリング加工が施される. 本研究ではテープを用いたテクスチャリング加工であるテープテクスチャリング加工において加工能率の向上と表面性状の向上を目指して, テープテクスチャリング加工液の界面活性剤の種類の選定, 砥粒濃度の最適化, キレート剤の添加, 砥粒の改質を行い, 加工能率と表面粗さの向上を達成した.

Titanium dioxide coated with apatite (AP-TiO2) was produced by stirring commercial TiO2 (ST-01) into a simulated body fluid (SBF). Radicals generated at the surface of photoaccelerated ST-01 and AP-TiO 2 were analyzed by electron spin resonance (E...

In glass disk polishing, fatty acid salts are added to Ceria Polishing Slurry for the purpose of the cost cut and the improvement in processing accuracy. A polishing performance improves by optimizing the concentration and the kind of fatty acid s...

A multifunctional composite material, titanium dioxide covered with apatite, has been developed for application in air purification and as an antimicrobial, antifungal, and antifouling coating. This composite can absorb and decompose bacteria and ...

Nanocomposites consisting of conducting polyaniline (PANI) and montmorillonite (MMT) were synthesized by the mechanochemical intercalation method. The mixtures of sodium MMT and anilinium chloride were mechanochemically ground in a mortar. X-ray d...

Methylene blue, hematoporphyrin and tar were used in pigmentation models to investigate whether titanium dioxide photocatalyst could be used to remove plaque or tar on dentures. Titanium dioxide and small amounts of acids were used to prepare a ti...

We developed a multifunctional composite material with a titanium dioxide surface covered by apatite for application in air purification and as an antimicrobial, antifungal, and antifouling coating. This composite has a function to absorb and deco...

For examining fracture process and influence of HA-granule-implantation on material property, HA-granule-implanted titanium alloy composites for tensile testing were prepared under the conditions of 1073 K, 17 MPa, 10 min in vacuo. Then, mechanica...

A novel photocatalyst was fabricated by coating TiO_2 and successively apatite on a fibrous ceramic body through the following procedure. At the first step, TiO_2 from Ti[(CH_3)_2CHO]_4 was deposited on the fibrous body by means of the sol-gel met...

For uniformly implanting hydroxyapatite (HA) granules into curved surfaces of titanium alloy implants such as dental roots, a new superplastic forming system was developed. By fixing PVA films with HA granules on a die's curved inner surface, HA g...

A novel photocatalyst was fabricated by coating Tio2and successively apatite on a fibrous ceramic body through the following procedure. At the first step, Ti02from Ti[(CH3)2CHO]4was deposited on the fibrous body by means of the sol-gel method (Tio...

In order to deform titanium plates superplastically, a SiO_2-CaO mold has been developed. SiO_2-CaO particles were observed on the surface of plates pressed by this mold. The particles were transferred from the mold surface. For the examination of...

A Branemark dental implant, which broke in the mouth, was investigated and the fracture process was examined. The implant had functioned as a dental root, but it was broken after a decrease in the marginal bone. In the fracture area, the outer scr...

歯科用補綴物は,長期にわたって口腔内で安定していなければならないことから,光触媒性を持つアナターゼ型二酸化チタン粉末を混合した(Ti5),(Ti0.1)は,この粉末状態のままでは歯科用樹脂材料としての使用は不可と思われる.アパタイトを被覆した二酸化チタン粉末を混合した(Ap5),(Ap0.1)については,強度試験,光照射試験の結果から,歯科用樹脂としての応用が可能である

Titanium matrix composites reinforced with alumina short fiber were fabricated by the hot-press method. Altex fiber (85 mass% γ-alumina, 15 mass% silica) was used in this study. A reaction layer was observed at the interface between Altex fi...

二酸化チタンを主成分とした漂白剤を用いることで,エナメル質を痛めずに5分から20分程度の処理で漂白効果が得られることがわかった.また,安全試験の結果から漂白剤が生物に対して安全性が高いことも示唆された

二酸化チタン光触媒を使用して,歯の漂白を簡単に短時間で行う方法を確立することを目的に,低濃度の過酸化水素と二酸化チタン粉末を混合した溶液を抜歯した変色歯表面に塗布し,光を照射してその前後の色調の変化等について観察し,二酸化チタンの歯の漂白剤としての可能性を検討した.1回5分間の漂白処理で,肉眼的に色調は変化し,処理回数が増えるとともに漂白された.L*,a*,b*表色系のいずれも漂白処理を行うことで変化し,漂白処理を2回行った歯のΔEの平均値は11.07と,明らかな色調の変化を示した.エナメ...

Hydroxyapatite (HA) -granule-implanted titanium alloy composites were obtained by a superplastical deformation in a ceramic die, which was fixed HA granules on its curved inner surface by polyvinyl alcohol (PVA). PVA films with HA granules are mad...

In order to deform titanium plates superplastically, a SiO2-CaO mold has been developed. SiO2-CaO particles were observed on the surface of plates pressed by this mold. The particles were transferred from the mold surface. For the examination of h...

Titanium matrix composites reinforced with alumina short fiber were fabricated by the hot-press method. Altex fiber (85 mass% γ-alumina, 15 mass% silica) was used in this study. A reaction layer was observed at the interface between Altex fiber an...

It was attempted to implant hydroxyapatite granules into a superplastic Ti-4.5Al-3V-2Fe-2Mo-alloy substrate. In order to improve the biocompatibility of the Ti-alloy, a pure titanium film was initially coated on the alloy substrate by reactive dir...

Glass-ceramics were investigated to obtain a glass with a composition of CaO·MgO·2SiO2·0.375TiO2 · 0.007Ag2O. The glass melted at 1500°C and could be cast. Crystallization of diopside of this glass is controlled by volume nucleation and growth pro...

A TiO2and apatite coated fibrous ceramics photocatalyst filter has been developed. This filter has a function to absorb and decompose bacteria and various other materials. TiO2was coated on the surface of the fibrous ceramics by a sol-gel method, ...

Diopside was prepared by sintering a powder compact of composition CaO-MgO-2SiO2, at 1300°C for 2 h. The bending strength of diopside was 300 MPa and the fracture toughness was 3.5 MPa m(1/2). It was proved that diopside has no general toxicity in...

In order to obtain a biomaterial that has both biological affinity and high mechanical strength, hydroxyapatite (HAp) granules were implanted into the surface of superplastic titanium-alloy. HAp granules (32-38 μm diameter) were spread over a supe...

Hydroxyapatite granules (32-50 μm in diameter) were spread over a superplastic titanium alloy substrate and pressed to implant the granules in the substrate. The more the stress increases, the deeper the granules were buried. Under 17 MPa for 10 m...

TiO2photocatalysts film supported on glass plate was soaked in a pseudo body solution (PBS) containing excess phosphate ions. The surfaces were characterized by scanning electron microscopy, energy-dispersive spectroscopy, thin-film X-ray diffract...

To obtain a biomaterial which has both biological affinity and high mechanical strengths, the hydroxyapatite granules were implanted into surperplastic Ti-4.5Al-3V-2Fe-2Mo alloy substrates. It is known that this alloy becomes superplastic when hea...

To obtain a biomaterial which has both biological affinity and high mechanical strengths, the hydroxyapatite granules were implanted into surperplastic Ti-4.5Al-3V-2Fe-2Mo alloy substrates. It is known that this alloy becomes superplastic when hea...

Glass-ceramics were searched for in the systems based on CaO-MgO-SiO_2-TiO_2-Ag_2O. The glasses melted at 1500℃ could be cast. The absorptions were measured. Silver colloids formed in the glasses of composition CaO・MgO・2SiO_2・0.375TiO_2・0.007Ag-2O...

The hydration and hardening characteristic of materials in the system CaO-MgO-SiO_2 have been investigated by XRD, SEM, FT-IR and calorimetry. 2CaO・MgO・2SiO_2 glass hydrated and calcium silicate hydrate gels(C-S-H)were formed after 90 min of curin...

The hydration and hardening characteristic of materials in the system CaO-MgO-SiO2have been investigated by XRD, SEM, FT-IR and calorimetry. 2CaO·MgO·2SiO2glass hydrated and calcium silicate hydrate gels (C-S-H) were formed after 90 min of curing....

Glass-ceramics were searched for in the systems based on CaO-MgO-SiO2-TiO2-Ag2O. The glasses melted at 1500°C could be cast. The absorptions were measured. Silver colloids formed in the glasses of composition CaO·MgO·2SiO2·0.375TiO2·0.007Ag2O, and...

Properties of diopside, CaMgSi_2O_6, powder prepared from metal alkoxides were investigated examine for its application as a biomaterial. Gel powder was synthesized by hydrolysis of mixed alkoxides, i. e. Ca(OEt)_2, Mg(OC_2H_4OEt)_2 and Si(OEt)_4....

The double-torsion method was employed to study the effect of environments on crack-growth law of hydroxyapatite. Three regions (regions 1, 2 and 3) were distinctly observed for measurement in air. In water only region 1 was observed. As the tempe...

Diopside has been developed for use in dental root implants and for the filling of bone defects. In previous studies, diopside developed hydroxyapatite (HA) on its surface and achieved a direct bond with bone. The purpose of this study was to inve...