Synthesis and Photovoltaic Performances of a Novel Phthalocyanine- perylene Molecular Heterojunction
b * ,a ( a 210009) ( b 100190) ( c 450001) ()(), -, . , 300780 nm . 10 5 Lmol -1 cm -1 , . , [6,6]--C 61 -(PC 61 BM) (OSCs)
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STUDY OF COMPLEX DUCTILE INCLUSIONS CONTROLLING IN MEDIUM-HIGH CARBON STEELS
Formation of a special kind of complex ductile inclusions (CDI), which were character as oxides covered by sulphides, was investigated in a medium-high carbon steel. It was believed that fatigue and toughness properties of carbon steels were benefited from CDI formation, for oxides were separated from steel matrix. By…
Effect of Biodiesel Fuel on a Fatigue Crack Growth Behavior of Al Cast Alloy
In order to investigate the effect of biodiesel fuel on a fatigue crack growth behavior of a squeeze cast Al alloy, AC4CH-T6, rotating bending fatigue tests were carried out using plain specimens in biodiesel fuel based rapeseed oil. The results were compared with those in mineral oils of light oil and turbine oil and…
Frequency Response Analysis of Electromagnetically Induced Vibration of Inverter Motors
Vibration and noise need to be calculated with a high degree of accuracy to estimate the radiated noise and vibration induced by the electromagnetic force from a motor. In the case of inverter motors, changes in rotation speed and load lead to changes in exciting frequencies and amplitudes of electromagnetic force har…
Pressure Dependence of Breakdown Voltage Under Inhomogeneous Field in CF3I Gas
CF3I gas is one of promising SF6 substitute. The insulation performances of CF3I, CF3I/N2, and CF3I/CO2 mixtures are examined through measuring sparkover voltage in inhomogeneous field under 0.1 to 0.5 MPa(abs)-gas pressure.
Precise Numerical Simulation of Gamma-ray Pulse Height Spectrum Measured with a CdTe Detector Designed for BNCT-SPECT
Boron neutron capture therapy (BNCT) is a new radiation therapy which can destroy tumor cells. In order to know the actual treatment effect directly in real time, we are developing a spectatorial system, which is called BNCT-SPECT. In the present study, we examined the feasibility of BNCT-SPECT by use of a CdTe detect…
Prediction Method for Temporal Change in Fiber Bundle Orientation on Cylindrical Braided Preforms
An advantage of braided composites is that the fiber bundle orientation angle, called the ″braiding angle,″ can be changed, because the braiding angle affects the mechanical properties. Control of the angle is an important means of adjusting the stiffness distribution as required. However, when the braiding angle is c…
Synthesis and Dielectric Properties of a Temperature Stable Ceramic: Ba4La3.73Sm4.66Bi0.93Ti18O54
A temperature stable high dielectric constant Ba4La3.73Sm4.66Bi0.93Ti18O54 ceramic was synthesized by conventional solid state route. The structural and micro-structural properties were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The compound crystallizes in the orthorhombic system…
Metals and alloys in the function of biomaterials
Biomaterials are natural or synthetic materials, used for guidance, maintaining or replacing the function of the human body's live tissues. Metal biomaterials are mainly used for replacing broken or damaged hard tissues such as bones, because of their high strength, toughness and corrosion resistance. The most frequen…
Tissue regeneration by recruitment of stem cells to injured tissues
現在行われている再生治療は、主として体外培養した幹細胞の移植である。これにより従来治療が困難と思われていた難治性疾患の治療の可能性が示されてきた。一方で、体外培養することによる遺伝子発現の変化も否定できない。たとえ有効性が示されたとしても用事調整の細胞では広く治療剤として普及することは難しい。もし体内の幹細胞を損傷部位に集積させて分化させることができれば、最も自然な形での組織再生が可能になるとともに、その誘導因子は再生治療剤として世界中に利用されるであろう。そのような幹細胞の損傷組織への動員や分化を促進する因子の研究も進んでおり、臨床応用に近づいているものもある。その取り組みの現状を紹介する。
EFFECTS OF Zn CONTENT ON MICROSTRUCTURE EVO-LUTION AND MECHANICAL PROPERTIES OF INDIRECT-EXTRUDED M}-BSn-Zn ALLOYS
SEM, TEM, EBSD, XRD £¡¼Ñת٠Zn É (1%-4%, ) ¥Þ Mg-8Sn-Zn ¸¨ ¡ ¨ ÚÐ Ö±Ë.°Â , º ¸ È ÜÖ¥Þ ¬ (250 ¦) ¾Ö¥Þ¥¬ (2 m/min) .¥ÞÄ , º É ÙÖ È ¥ÞÄ ³¬°¤ ¥Þ Ç ; ºÖ ¾ Þ » ÖÚÖ¾, ¹± ¾ À » 7.4, 8.3 10.5 µm.ª Zn É ÖÁ¯, ¥Þ ¸¾ ¾ µÖ ¤Î ÈÖ Ü Á¯, É Èظ ¸¦¢Ö Mg2Sn È ¦¢Ö• Zn Ȩ .¤Î µ ¾ ³ Ö Èº ß §Ã ¾³, Î ¾ À .Ö³ª Zn É ÖÁ¯, ¸Ö ¬ Ü, É ¾ Ö Ü º .¨ ¡…
Examination of Injection Molding Properties of Nozzle and Attempt of Product Filling into Mold in Injection Molding of Only Steamed Bamboo Powder
It is important to use reusable plant resources effectively from the viewpoint of the reduction in carbon-dioxide emission and the sustainable use of resources in the future. In this study, injection molding using only steamed bamboo powder by means of an industrial machine was carried out as a basic study of the form…
Polymer Brushes on Carbon Nanotubes by Thiol-Lactam Initiated Radical Polymerization of 2-Hydroxyethyl Methacrylate
Water-soluble polymer brushes with multi-walled carbon nanotubes (MWNTs) as backbones were synthesized by grafting 2-hydroxyethyl methacrylate (HEMA) from surface functionalized MWNTs via in situ surface thiol-lactam initiated radical polymerization. MWNTs were functionalized with 2-mercaptoethanol and used as initiat…
Study on Flux and Alloy of Lead Free Solder with Mitigation Effect and Consideration for Acceleration Test Method
はんだからのウィスカの発生は，高温湿度環境に放置することによって生じるので，電気化学的測定を採用し，あわせてEPMA分析を行って，その発生のメカニズムを考察した。この結果を踏まえて，ウィスカの発生を抑制する効果をもつ材料の提案を行った。まず，はんだがSn–3Ag–0.5Cuで，種々のフラックスを変えてウィスカの発生を見た結果，活性剤に臭素があると，腐食を促進する触媒となっており，他のフラックスではウィスカ発生までの時間が長くなった。また，Snはその水酸化物を経て酸化錫になることがAir-HAST（通常HASTで試験されている装置に空気分圧を追加したもの）の実験結果より導き出された。次に，臭素系活性剤を含むフラックスを使って，種々の…
Molecular Dynamics Study on the Particle Dispersion Mechanism of Polyamide-imide/Silica Nano-composite Materials
We studied the particle dispersion mechanism of polyamide-imide/silica nano-composite material by using molecular-dynamics simulation technique based on Newtonian dynamics and quantum mechanics. In simulations, adhesive fracture energies at the interfaces between silica and solvents were calculated, and Brownian motio…
Sorting Carbon Nanotubes by Density Gradient Ultracentrifugation
Single-wall carbon nanotubes have attracted recently a great interest in various applications. Existing methods for growing single-wall carbon nanotubes produce samples with a range of geometrical structures and different electronic properties, but many potential applications require nanotube samples with the determin…
10 GPa-Class High-Pressure NMR Technique Realized by the New Cell with Improved Space Efficiency
We describe our recent progress in high-pressure nuclear magnetic resonance (NMR) technique, which extends the range of practical NMR experiments to 10 GPa-class. The new opposed-anvil type cell has significantly large sample space, though the whole clamp cell size is small enough to put within superconducting magnets…
Fabrication and Characterization of Percolating Nanocluster Devices
We are reporting on the fabrication and characterization of palladium (Pd) nanocluster devices. Pd nanoclusters were synthesized inside a dc magnetron sputtering chamber, where the plasma vaporizes the target's material and nanoclusters are formed by inert gas condensation. The size distribution of the produced nanocl…
Structure-property relationships of an A36 steel alloy under dynamic loading conditions
Structure-property quantification of an A36 steel alloy was the focus of this study in order to calibrate and validate a plasticity-damage model. The microstructural parameters included grain size, particle size, particle number density, particle nearest neighbor distances, and percent of ferrite and pearlite. The mec…
Reduction of briquette composite made of lowgrade from ore and biomass ash
Mini blast furnace project has been constructed to increase pig iron production for domestic consumption produced by HyL process. Malaysia has no significant high grade iron ore deposit white domestic low grade ore could not utilized for direct reduction process. Beneficiation of the low grade ore containing crystalli…