Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Infrared scanning near-field optical microscopy (IR-SNOM) is an extremely powerful analytical instrument since it combines IR spectroscopy's high chemical specificity with SNOM's high spatial resolution. In order to do this in the infrared, specialty chalcogenide glass fibers were fabricated and their ends tapered to…
We present a microscopic description for the impacting process of silicon nanospheres onto a silicon substrate. In spite of the relatively low energy regime considered (up to 1 eV/atom), the impacting process exhibits a rich behavior: A rigid Hertzian model is valid for speeds below 500 m/s, while a quasi-ellipsoidal…
Conditions of green body preparation and consequently the conditions of sintering are prerequisite for the preparation of dense samples of Al2O3 with superior optical and mechanical properties. The goal of this work was to determine the optimum forming conditions for preparation of green body, and to find out the opti…
New transparent and electric conductive material, Mg(OH)2-C, was prepared by the sputtering Mg and C, and post-reaction of the Mg-C film with moisture in the air. The prepared film was composed of Mg, C, O, and H, and the lattice symmetry was identified to be Mg(OH)2 structure (P-3m1) with slightly elongated c-axis co…
New tool materials, high performance spindle systems and intelligent driving systems make possible a drastic increase in the cutting speed for machine tools. High Speed Cutting (HSC) can lead to enhanced surface qualities and lower cutting forces. With a view to the state of the art, it can be pointed out that the sci…
Orotidine-5'-monophosphate decarboxylase (OMP decarboxylase, ODCase) catalyzes the decarboxylation of orotidine-5'-monophosphate (OMP) to uridine-5'-monophosphate (UMP). Despite extensive enzymological, structural, and computational studies, the mechanism of ODCase remains incompletely characterized. Herein, carbon ki…
The effect of inclusions, generated during de-oxidation and solidification, of low carbon (0.07 wt%) and high manganese (0.9 wt%) steels, on the rates of migrations of the boundaries between delta-ferrite/gamma-austenite interfaces, during austenite formation was investigated. The presence of two types of de-oxidation…
4-ヒドロキシブチルビニルエーテルの重付加により得られるポリアセタール(PHBVE)をソフトセグメントとして有するポリウレタンエラストマー(PHBVE-PU)を合成し，PHBVE-PU の熱的性質と力学的性質に及ぼすソフトセグメント鎖長の影響を検討した．PHBVE-PU の弾性率やゴム弾性を示す温度領域は，ソフトセグメントである PHBVE 鎖長により制御でき，従来の汎用的なポリエーテル系熱可塑性エラストマーと同程度の物性を有していた．PHBVE-PU は，熱的に安定であるが，塩酸を作用させると，ポリアセタールソフトセグメントが室温で速やかに加水分解し，分解生成物として 1,4-ブタンジオールを定量的に生成した．
International audience
Gamma-glutamyl hydrolase, a cysteine peptidase, catalyzes the hydrolysis of poly-gamma-glutamate derivatives of folate cofactors and many antifolate drugs. We have used internally quenched fluorogenic derivatives of glutamyl-gamma-glutamate and (4,4-difluoro)glutamyl-gamma-glutamate to examine the effect of fluorine s…
The technology of solid-state lighting and flat panel displays can benefit from advances in organic layer deposition and homogeneous light output. Displays based on organic light-emitting diodes (OLEDs) have benefited from significant advances that have now made them commercially available. Due to the high efficiency…
A 3D scaffold, in the form of a foam, with the top surface carrying a micropattern, was constructed from biodegradable polyesters poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) (PHBV) and poly(L-lactide-co-D,L-lactide) (P(L/DL)LA) to serve as a substitute for the extracellular matrix (ECM) of tissues with more t…
Hexagonal-shaped nanoprisms of ZnO on indium tin oxide substrates are grown using an electrochemical process. The surface morphology and crystallinity of the ZnO nanostructures are characterized by field-emission scanning electron microscopy and X-ray diffraction, respectively. Perfectly hexagonal-shaped ZnO nanoprism…
We have developed high-efficiency red organic light emitting diodes (OLEDs) incorporating 1,3,5-tris(1-pyrenyl)benzene (TPB3) as the host material and 4-(dicyanomethylene)-2- tert -butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)- -pyran (DCJTB) as the dopant. The highly efficient energy transfer, which arose as a result…
In a fast reactor safety analysis determination of the molten core conditions when it reaches the core catcher plate is one of the main factors after a postulated MFCI event. If large fragmentation and quenching is accomplished in the coolant column no major problems for main vessel attack would occur. If instead, a s…
Electronic states at chemically treated SiC surfaces have been studied by scanning tunneling spectroscopy. Charge accumulation on the surface is deduced through a voltage shift observed in the spectra. More charge is observed on electropolished surfaces as compared to untreated (as-received) surfaces. This difference…
The wettabilities of Al2O3/nylon 1010 (Al2O3/PA1010) composite, polysiloxane/steel T8 (polysiloxane/T8) composite, polyethylene, nylon 1010, nylon 6, polystyrene, steel T8 (a high carbon steel with 0.75–0.84% carbon), steel 45 (a medium carbon steel with 0.42–0.50% carbon), and Al2O3 surfaces were tested and analyzed.…
Single-phase (β-SiAlON (Si4Al2O2N6, z = 2) powder has been prepared by the combustion synthesis method. The raw materials (Si, Al and SiO2) were combusted with different ratios of (β-SiAlON (z = 1) diluent (0, 10, 20, 30, 40, 50wt%) in 1MPa of N2 pressure. Without diluent, the reaction temperature was very high (> 200…
We explored the mutual incorporation tendency of branched chain amino acids (L-leucine, L-isoleucine, L-valine) and isomorphic amino acids in cooling crystallization conducted in water solvent. In most cases, a guest amino acid (an impurity amino acid) whose side chain is longer than that of a host amino acid (a purif…
Single crystals of BiFeO3 were prepared by hydrothermal synthesis using hydrate sodium bismuth oxide (NaBiO3·nH2O) and iron nitrates (Fe(NO3)3·9H2O) in the potassium hydroxide solutions. The size of BiFeO3 single crystals increased with the reaction temperature and duration. Single crystals of sillenite-type Bi12.5Fe0…