Materials Literature
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中越パルプ工業株式会社川内工場は，製紙用原料として国内では放置されていた伐採竹を官民一体となって大量に且つ持続的に集荷し資源として活用する事で竹林整備，隣接する森林や里山，生物多様性の保全に貢献している。竹紙の生産は地域住民・木材加工業者・川内工場の三者が経済的・時間的な負担を等分に分け合うことで成り立っている。地域資源である伐採竹を使用した竹パルプ製造は当初連釜により開始したが，効率的，有効的利用を行うため，平成22年より小ロット品種生産に適したバッチ釜製造ラインに切替えて竹パルプの増産を図ってきたのでその事例について紹介する。
．はじめに 半導体集積回路においては，1997 年頃以降，微細配線に 電気めっきによる銅 (Cu) が用いられるようになった 1) 。その 理由は，Cu 配線がそれ以前に用いられてきたアルミニウム 合金の配線に比較して，低抵抗で電流密度耐性が高いため， 微細化に伴う配線遅延の増加や信頼性劣化の対策として必要 になったからである。微細 Cu 配線は図 1 に示すように，絶 縁膜の溝 (トレンチ) や孔 (ビア) に金属を埋め込んだ後，化学 的機械研磨 (CMP：Chemical Mechanical Polishing) で不要な金属 を除去・平坦化するダマシン (Damascene) 法で形成される 2) ,3) 。 金属の埋め込…
In this article, the synthesis and fundamental properties of [2.2]paracyclophane-containing through-space conjugated polymers are described. By incorporating pseudo-para-, pseudo-ortho-, and pseudo-geminal-linked [2.2]paracyclophane skeletons into conjugated polymer main chains, through-space conjugated polymers compr…
We have developed a high-performance thin-film multijunction thermal converter (TMJTC) with improved stability, and evaluated its frequency property, long-term stability, and environmental property using high-precision AC-DC transfer difference comparator system. We have fabricated a TMJTC with improved deposit patter…
Biaxial tensile tests of 6000 series aluminum alloy sheets with different density cube textures were carried out using cruciform specimens. The specimens were loaded under linear stress paths in a servo-controlled biaxial tensile testing machine. Plastic orthotropy remained coaxial with the principal stresses througho…
Radiological Risk Management is an important method to be implemented in the RTP in the early stages of radiation control. The goal is to reduce exposure to radiation and to avoid undesirable risk because of the exposure from happening. This paper outlines the evolution of the Radiological Risk Management that was imp…
A theory of quasi-stationary spectrum of electrons interacting with electromagnetic field of arbitrary intensity in an open two-barrier resonance tunnel structure is developed using exact solution of the complete Schrödinger equation.It is shown that, besides the quasi-stationary electronic states having usual resonan…
Ibuprofen (IB) is one of the most important non-steroidal anti-inflammatory drugs used in the treatment of inflammatory chronic diseases. This drug presents, in the pure state, poor physical and mechanical characteristics and their use in solid dosage forms needs the addition of excipients which improve these properti…
We provide a simplified measurement method for repetitive partial discharge inception voltage (RPDIV) of enameled wires subjected to repetitive impulses. Previously, a large number of faint discharge signals were monitored on a high-spec digitizing oscilloscope with long memory to count the number of the discharges af…
Applications of biomass-based materials have drawn attentions as a future material technology due to the green as well as the sustainable developments. Wood biomasses have a great abundance on the earth, and many studies aiming at an industrial use of wood biomass have been done by means of the physical and the chemic…
A novel, simple and highly sensitive amperometric flow-injection analysis (FIA) system with electrochemical detection for azide was developed by using hemoglobin-adsorbed carbon-felt (Hb-CF). This electrochemical FIA is based on the inhibitory effect of azide upon the Hb-CF-catalyzed electrochemical reduction of disso…
We have been developing a novel surface cleaning technique using steam and water mixed spray. Our technique shows great efficiency in removing thin surface film such as photo-resist film. However, the film-removal mechanism has not been clarified yet. One possible film-removal mechanism is the local heat expansion due…
A time dependent 3D numerical model for the behavior of flexible curtain in water was proposed, which is composed of two-way coupling of fluid flow calculation by SMAC method and simple model of curtain structure. The curtain structure is approximately described as an unclosed polyhedron with ribs and nodal points tra…
The present work is concerned with the growth of small-diameter single intermetallic compound crystals by the floating-zone method using a radio frequency(RF)induction heating.In order to maintain a convex solidification interface,which is required for the growth of single crystals,we have developed a novel two-phase…
The effects of finishing on the physical properties of yarn dyed cotton fabrics were studied. The fabric mechanical properties, surface properties, thermal/water/air transport properties and fabric handle were investigated in order to establish the performance characteristics of fabrics. The sample fabric with each fi…
Laser beam welding is one of the jointing processes by irradiating laser beam on the material surface locally and widely used at various industrial fields. Toshiba has developed various laser-based maintenance and repair technologies and already applied them to several existing nuclear power plants. Laser cladding is…
In the procedures of designing polystyrene-polyvinyl alcohol-CH (carbon and hydrogen elements) (PS-PVA-CH) triple-layer microspheres, there are many methods such as drop-tower technique, emulsion micro-encapsulation, dip (spin) coating, interfacial polycondensation, and spraying technique to prepare the PVA coating. D…
ポリビニルピロリドン（PVP）溶出制御は，ポリスルホン（PS）膜などPVP配合膜ダイアライザにおける重要な課題である．ダイアライザの滅菌法はPVP溶出に深く関与し，同じ銘柄のダイアライザでも保管期間の違いによりPVP溶出量が異なる．本研究では，PS膜のPVP溶出に及ぼす滅菌法と保管期間の影響を検討するため，共通のPS膜を使用し滅菌法が異なるウェットタイプダイアライザAPS-SA（APS-15SA：APS, n＝7）とRENAK PS（RENAK PS-1.6, n＝7）を用いて，ダイアライザ血液側について生理食塩液（生食）1.0Lによる洗浄時のPVP溶出量，充填液中のPVP濃度，洗浄開始0.5および1.0L時点におけるダイアライザ…
In this study, a numerical method to estimate the mechanical behaviors of woven fabric composite under off-axis loading is proposed. Although FEM has been widely used for the estimation of mechanical behaviors or optimization of the FRP structure to save designing costs, mechanical behaviors, especially damage develop…
The enhanced fluorescence effect of Rh6G molecules deposited on physically polished copper surface was studied.The result shows that the formation of oxidation film on the metal surface plays an important role in the fluorescence emission.The quench and enhanced surface fluorescence effect from the physically polished…