Materials Literature
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The relationship between magnetic phase transition temperatures (Curie temperature: Tc, ferromagnetic-antiferromagnetic transition temperature: T0) and lattice distortions in L10 FePt1−xRhx thin films (6 nm thick) were studied. Thin film depositions on varied substrates modifies lattice constants due to misfits betwee…
The reprocessing of spent nuclear fuels at the Rokkasho reprocessing plant generates radioactive wastes in solid and liquid forms. These wastes contain a mixture of radioactive nuclides such as Transuranium (TRU) elements, fission products (FP), and corrosion products (CP). The waste processing methods prior to dispos…
The oil separation system plays an important role in improving the quality of oily metal cutting chip as recycled materials disposed from metalworking factories. In this paper, a practical circulation-type superheated steam degreasing system, which is applied to oily metal cutting chip disposed from a metalworking fac…
Dry textiles are usually incorporated into the RTM method as a fibrous reinforcing material. The architecture of the textile material affects both the permeability and material properties of the final product. We optimized the textile architecture to improve manufacturing efficiency and product quality. In this optimi…
The pebble bed reactor (PBR), a kind of high-temperature gas-cooled reactor (HTGR), is expected to be among the next generation of nuclear reactors as it has excellent passive safety features, as well as online refueling and high thermal efficiency. Rock-like oxide (ROX) fuel has been studied at the Japan Atomic Energ…
Corrosion is one of the basic reasons of the ship hull strength retrogression; therefore, it is necessary to control the operational mode of the systems of the ship steel hull electrochemical prevention from corrosion. At the same time, it is necessary to estimate the ship steel hull potential function by means of mob…
グルコース単位が環状に繋がったホスト分子シクロデキストリン(CD)および酸化還元応答性ゲスト分子フェロセン(Fc)を側鎖に導入したポリマーや高分子ゲルを用いて，酸化還元応答性超分子材料を創製した．側鎖にCDを修飾したポリマーとFcを修飾したポリマーとの混合により超分子ヒドロゲルが形成された．ホスト–ゲスト相互作用の可逆性に起因する自己修復性を見いだし，Fcの酸化還元に伴うCDとの相互作用の変化を利用してこれをオン・オフ制御した．この超分子ネットワークに化学架橋を導入すると，酸化還元に応じたゲル内部の架橋密度の変化に伴い膨潤・収縮するゲルとなった．さらにCDおよびFcを別々のゲルに導入するとそれらが接着することを見いだし，Fcの特徴…
O receptor P2X7, contido na família de receptores P2, é um receptor inotrópico purinérgico, cátion seletivo, ativado por nucleotídeos (ATP). Esses receptores são expressos em células do sistema nervoso central, periférico e células da linhagem hematopoiética além de estarem envolvidos em diversos processos biológicos…
Ethanol has the same theoretical air-fuel ratio as DME but has different reactivity. In this study, effect of ethanol blending on ignition and combustion of DME spray was investigated by numerical calculation. As the results, the ignition timing retards and the equivalence ratio in a spray shifted toward lean with eth…
We investigate the characteristics of cogging torque and unbalanced magnetic force (UMF) due to the interaction between magnetization of permanent magnet (PM) and stator eccentricity in PM motors. We numerically show that the third harmonic of PM magnetization interacts with stator eccentricity to decrease the amplitu…
Geopolymers are amorphous, inorganic structures based on silicate and aluminate tetrahedrons and could be beneficial in thermal and fire resistant applications. The outcomes from this work suggest that fly ash geopolymer composites suitable for thermal applications can be produced. When compared to OPC based systems g…
Metal/Metal universal joints reinforced by carbon fibers had been proposed to save the energy and to enhance the mobility of mover machines. The ductile fracture occurred at aluminum part in the Ti/Al joint with carbon fiber reinforcement (CFR). Although the tensile strength (σ_b) was slightly reduced, its strain (ε_b…
We report for the first time thermal conduction tuning in phononic crystals. This tuning is based on the wave properties of phonons at low temperature, similarly to what can be done with photons.
Last few decades, many researchers have experimented with micro-scale compression or tension test, and have reported that the plastic behavior of crystalline materials with small dimensions is different from that of bulk. For designing microsystems, it is very important to understand deformation mechanism of nano- and…
Aminosilanized micro patterns were transferred on mica substrate using PDMS soft stamp fabricated by utilizing anisotropic etched Si substrate as a mold and proteoglycan molecular immobilization were investigated. Two types of parting agents were investigated to improve detachability of PDMS stamp from Si mold, and pi…
In the present study, the interface fracture toughness and adhesioln strength between a Ti coating film and Al-alloy substrate was evaluated using a laser spallation method. The fracture toughness and adhesion strength can be estimated using inverse analyses by the boundary element method using a transfer function com…
Magnesium substituted hydroxyapatite (Mg-HA) thin films were prepared using rf-magnetron sputtering method. The Mg-HA films were coated onto a Ti substrate from a mixed HA/MgO powder target, which were undertaken in an Ar gas. The molar ratio of Mg to Ca in the mixture target was varied in the ratio of 0:10, 2:8, 4:6,…
Nanoscale hybrids attract much attention of researchers nowadays. Rebar graphene is one of such hybrids. It means polycrystalline graphene which is reinforced by carbon nanotubes laid across its grain boundaries. In this paper, the tensile properties of rebar graphene are investigated by means of molecular-dynamics. S…
一槽式微生物燃料電池（MFC）を用いて乳酸が主要な有機物成分として含有されることを特徴とする食品製造系排水の処理特性を実験的に検討した．また，開回路系と酢酸模擬排水供給系を対照として，基本的な処理ならびに発電特性について比較を行った．その結果，実排水に対する有機物分解速度はMFCでは1.4 kgCOD/m3/dayに達し，開回路系の0.9 kgCOD/m3/dayに比べ約1.6倍に向上した．MFC内では乳酸の分解産物と考えられるプロピオン酸等の有機酸の分解速度が大きく上昇しており，このことが有機物分解速度向上に寄与した．また，MFC内では開回路系に比べGeobacter属の細菌群が高い割合で検出され，実排水処理においても発電のみな…
Bioactive nanocrystalline Fe doped hydroxyapatite (Fe: HAP) were successfully prepared through auto-combustion route. The synthesized samples were characterized by various physico-chemical methods. Thermal stability investigated using thermo-gravimetric and differential thermal analysis (TG-DTA). Structural characteri…