Materials Literature
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Diffusion coefficients of hydrogen in fully annealed specimens of pure iron, Fe-(0.46∼5.17 at%)Al, Fe-(0.53∼5.06 at%)Si, Fe-(0.47∼7.67 at%)V, Fe-(0.40∼5.10 at%)Cr, Fe-0.35 at%Mn, Fe-(0.41∼4.79 at%)Co, Fe-(0.98∼5.16 at%)Ni, and Fe-(0.51∼3.35 at%)Mo alloys have been measured by the electrochemical permeation method betw…
Behavior of hydrogen in an austenitic stainless steel SUS316L was investigated by tritium transmission electron microscopic autoradiography.Distribution of silver grains in the autoradiograph obtained by the β-rays emitted from tritium in the specimen indicated that hydrogen was trapped by defects and precipitates in…
Semiconducting characteristics of oxide film on pure Zr, Zr-Sn binary alloy, and Zr-Sn-X (X: Fe, Ni, or Cr) ternary alloy were evaluated by a photo-electrochemical method to study the effects of alloying elements on the oxidation mechanism of Zr alloy in a boiling water reactor (BWR) environment. Oxide films of the al…
A series of isothermal investigations have been performed in static autoclaves at 623 K in both standard start of cycle coolant and a series of more concentrated lithium and lithium-boron solutions to simulate the environment which might result within a porous oxide due to hideout. In solutions containing 220 ppm of l…
The magnetic susceptibility of the dinuclear iron(III) complex [Fe2(bpmar)(H2O)4](NO3)4·3H2O {H2bpmar–4,6-bis[N, N-bis(2′-pyridylmethyl)aminomethyl]-2-methylresorcinol}, in which the bridging ligand was designed by considering the topological relationship of the network of dπ spins to the bridging ligands, has indicat…
An appropriate evaluation technology of corrosion is essential for the development of precoated steels for automotive use. There are various test methods: field surveys, monitor car tests, proving ground tests, vehicle exposure tests, under- and on-vehicle tests, the Volvo test and laboratory tests. They are briefly e…
The amphiphilic porphinato zinc(II), i.e.[5, 10, 15,20-tetra{α,α,α,α,-o-[2′,2′-dimethyl-20′-((2″-trimethyl-ammonio) ethyl) phosphonatoxy octaneamido]phenyl}porphinato]zinc(II) complex (abbreviated to ZnP), was embedded in the liposomes of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC). The electron-transfer reacti…
Water-based technology has undergone revolutionary changes during the past two decades. Interest in the properties and uses of water-based coatings, paints and inks has continued to grow since the est
Fracture toughness, modulus of rupture (MOR), and thermal shock resistance were evaluated on COG, X7R, and Z5U type commercial ceramic capacitors with and without internal electrodes. Fracture toughness measurements show similar values for X7R and Z5U dielectrics and a slightly higher value for COG dielectrics. The pr…
Transformation characteristics, deformation behaviour and hardness properties of near equi-atomic Ti-Ni shape memory alloys irradiated at 323 K by neutrons to the fast neutron fluence of 8×1023 m−2 have been studied by remote-controlled electrical resistance measurement and tensile and hardness tests.The MS temperatur…
Samples of an ovine collagen-polyester composite device suitable for peripheral revascularization, the Omniflow Vascular Prosthesis, have been retrieved for morphological and immunohistological analyses during and up to 4 years of implantation in a dog aortoiliac by-pass model. At the various sample times, the prosthe…
The steric stabilization of polymer colloids by diblock copolymers is simulated on a 22×22×22 cubic lattice with periodic boundary conditions. In the systems described here, the lattice contains 20 chains, the volume fraction of polymer never exceeds 0.0376, and the number of beads in a chain never exceeds 20. The beh…
An analysis of the frequencies of different values encountered in protein electron-density syntheses reveals characteristic shapes for their distributions (histograms). This property can be used to refine ill-defined phases (and, perhaps, some of the moduli) of structure factors, and thus to obtain more-interpretable…
Immiscible blends of thermoplastics containing copolymer to enhance compatibilization between the phases have been analyzed using dynamic mechanical analysis. Results are compared to blends in which no compatibilization was attempted. Systems studied included polyphenylene sulfide/poly ether imide, impact modified pol…
Adhesion strength of a photoresist during pattern development decreases as penetration of an alkaline aqueous solution into the photoresist film increases. The penetration is accelerated by increasing the quantity of residual solvent in the photoresist film. Resistance measurements confirmed the penetration. The tensi…
In order to understand cathodic reactions of Ti-based alloys, local electronic states of the cathode were simulated by a DV-Xα cluster method. A local electronic cell model was assumed here, in which the anode is the titanium-matrix region and the cathode is the alloying-element containing region. The cathodic reactio…
The history of precoated steel usage as car body materials in Japan is reviewed first. Japanese steelmakers developed galvannealed steel, duplex Zn–Fe coated steel, Zn–Ni coated steel and organic composite coated steel. All of them have been widely used. Recently, electrolytically Fe–Zn plated galvannealed steel and 1…
Abstract Tetramethylammonium 3‐aminopropyl dimethylsilanolate, readily prepared from bis(3‐aminopropyl) tetramethyldisiloxane and tetramethyl‐ammonium hydroxide pentahydrate, has been found to serve as a highly effective catalyst for the ring opening polymerization of cyclic siloxanes with an end blocker such as bis(3…
The alkaline hydrolysis of several powdered methacryloyl polymeric prodrugs (1P-3P) prepared by mechanochemical polymerization, each of which contains acetaminophen (1), 7-theophyllineacetic acid (2) and 5-fluorouracil (3) as a pendant drug group has been examined in a heterogeneous system on its comparison with that…
In an effort to formulate the pharmacologically active ibuprofen isomer ((+)-S-ibuprofen) into a solid oral dosage form, preformulation studies were performed on both the racemate and this stereoisomer of ibuprofen. Results of the respective physical pharmacy profiles were compared to predict the pharmaceutical behavi…