Materials Literature
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ホウ素中性子捕捉療法（Boron neutron capture therapy, 以下BNCT）は，主として悪性脳腫瘍，悪性黒色腫に対して施行されてきた。2001年に標準治療後の再発耳下腺癌に対して，BNCTが世界初の試みとして実施され，放射線治療後の再照射であったにもかかわらず，重篤な有害事象を引き起こさずに腫瘍が著しく縮小した。それ以来，頭頸部腫瘍に対するBNCTの施行例は増加しており，日本とフィンランドから，頭頸部腫瘍に対するBNCTの治療効果として，重篤な有害事象は認めず，良好な局所治療効果が得られているとの報告がされている。今後，BNCTが頭頸部腫瘍の臨床現場に対して大きな貢献をするためには，原子炉を中性子源とするBN…
The surface structures of SrTiO3 thin films homoepitaxially grown by pulsed laser deposition (PLD) were studied using low temperature scanning tunneling microscopy (STM). We suggest microscopic pictures of the near-surface stoichiometry of SrTiO3 thin films, depending on their thickness and the growth mode. For compar…
The effect of crack tip strain rate (CTSR) on environmentally assisted cracking was studied for alloys AA-7075 (Al-Zn-Mg-Cu) and AA-8090 (Al-Li-Cu-Mg) in the artificially aged condition. Fatigue pre-cracked double cantilever beam (DCB) specimen were employed with the crack plane parallel to the rolling plane. The crac…
A mathematical model for prediction of the end breakage rate due to knots in the plain knitting zone is formulated by using the mathematical model of the plain knitting process and the mechanism of the end breakage due to knots in the plain knitting zone. The only unknown value in the computer program based on this mo…
Cottonisation of flax not only makes flax usable for producing textiles, it also further divides the technical fibre into (bundles of) elementary fibres and removes partly the alkali-sensitive pectin and hemicellulose. An experimental investigation was performed to assess the characteristics of cottonised flax in fibr…
以Bi（NO3）3.5H2O和Ti片为原料,无水乙醇为溶剂,采用溶剂热法合成了具有取向性的织构化Bi0.5 Na0.5 TiO3（BNT）无铅压电陶瓷.采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）和能谱仪（EDS）对BNT无铅压电陶瓷物相、显微形貌和成分进行了表征.系统研究了NaOH浓度、[Bi3＋]浓度、表面活性剂和溶剂等因素对BNT晶粒物相、微观形貌和成分的影响.结果表明：NaOH浓度为1 mol.L-1,[Bi3＋]浓度为0.1 mol.L-1,聚乙二醇（PEG）加入量为1～6 mL,且溶剂为无水乙醇时可以制备出织构化BNT陶瓷,产物颗粒尺寸平均为10～20μm.
Graphene, as an ideal two-dimensional material, holds great potential for building high-performance sensors. Traditional microfabrication processes, such as lithography and etching, often require multiple complex steps including masking and aligning. Moreover, the graphene is often configured as the semiconducting mat…
細い管型反応器によるホットソープ法（高温の界面活性剤中での反応晶析）で，マンガンドープ半導体ナノ粒子の連続調製を試みた．反応管内流れは層流であるため，拡散支配の緩慢な混合過程，広い滞留時間分布などが問題となる．そこで，反応管内部の液相の混合状態を改善するために，反応管に気液スラグ流を導入し，その効果を検討した．その結果，ドーパントに由来する蛍光スペクトルが発現するまでの管内における滞留時間が，液一相で反応させた場合に比べて，大幅に短縮できることが明らかになった．
We have studied the electrical properties and depth concentration profiles of Au/Ni-Zn-O/p-GaN and Au/Ni-Zn/p-GaN, thus of structures containing zinc as a p-type dopant utilized to increase the concentration of free charge carriers in the subsurface region of GaN and to gain a low-resistance ohmic contact. The layers…
We investigate the effect of drawing conditions on the drawn diameter in cold wire drawing by Finite Element Method. The mechanism of diameter variation was elucidated including the elastic deformation of the die, undershoot, diameter thickening during drawing and unloading springback. Undershoot was caused by the sep…
Zn-Ni and Zn-Co alloy coatings with 5-18 at% Ni and 8-25 at% Co have been prepared by DC plating in additive free chloride baths.Effects of bath composition on the alloy composition, texture, grain size, morphology and hardness were investigated. Potentiodynamic anodic stripping, reverse chronopotentiometry were emplo…
Materials property data, and broader materials information, are essential to the wide range of people and functions in engineering enterprises involved in the design and construction of power generation facilities. This paper focuses on how this complex and specialist information must be managed, and how it can be dep…
This work examines the average value of electronic kinetic energy during the dielectric ageing of solid insulators. For this purpose, samples of various insulators with a relative permittivity e r =2.5-4.5 (e.g. industrial bakelite) were electrically stressed by the imposition of a high AC voltage. The electrode set-u…
Structure Determination from Powder Diffraction data (SDPD) technique for organic and organo-metallic molecular crystals has been developed since 1990s, and is now widely used. The X-ray powder diffraction data has a difficulty in extraction of correct intensity data from overlapping diffraction peaks, however, the de…
Several R & D topics related to surface science in automobile industry are reviewed in chronological order from early 1970s, including topics on instrumental analysis of surfaces, sputtering and plasma processing, birefringent thin films, all optical sensors, transient analyses of surface chemical reactions in automob…
Conjugated Schiff-base macrocycles are interesting compounds of interest as platforms for catalysis, the preparation of novel synthetic ion channels and potentially as porous or tubular discotic liquid crystals. The preparation of organic macrocycles is typically low yielding, with polymerization competing with cycliz…
近年の資源保護，環境保護への取り組みにより製紙原料として植林木パルプ，古紙原料の利用が多くなっている。植林木パルプは短繊維であり多くの主材料はLBKPである。叩解工程において無駄な繊維カットを行なわずに紙力を得ることが重要な課題であるといえる。そして更なる課題としては省エネルギーである。本稿では当社での最新のLBKP叩解テストデータを元にADCダブルコニファイナーとDDR，そしてFINEBARと鋳鋼刃の特徴を説明する。また，古紙利用の増加に伴い原質設備のスクリーン工程でも省エネルギーは重要である。省エネルギー用スクリーンローターとして開発されたGHCローターと更に開口面積を増加させたNW1バスケットの説明をする。
Epithelial downgrowth on implants can result in deep pockets or sinus tracts which in turn can lead to marsupialization and eventual failure of the implant. One solution to this problem would be to have a surface of an implant that has the ability to impede the apical migration of epithelium. The present studies were…
The ZnO nanowires were grown on Si(100) substrates by chemical vapor deposition method without using catalyst.The X-ray diffraction(XRD) indicates the highly preferred crystal orientation along the c axis of ZnO in this sample.Field emission scanning electron microscope(FE-SEM) showed well-aligned ZnO nanowires with u…
類に分類されよう．①実験室的腐食試験，②パイロット プラント腐食試験，③実地試験(プラント試験)である． 腐食は材料と環境の相互作用により，かなりの長時間