Materials Literature
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The commercially pure grades of titanium satisfy a wide range of engineering applications due to their excellent corrosion resistance, good mechanical properties, excellent fabricability, and competitive costs. As is the case for most metal systems, alloying of titanium greatly extends its usefulness. This is illustra…
Abstract Darstellung und spektroskopische Eigenschaften der Verbindungen 2, 3 , des nichtsubstituierten Azulenopseudophenalenons 4 sowie der Azulenderivate 5, 6, 7 und 8 werden beschrieben; ausgehend von dem 4‐Azulenyl‐dimethylthioether 5 wurden die weiteren Azulenderivate 9, 10, 11 erhalten. Reaktionen an der Carbony…
Miniaturization has made it possible for electronics to penetrate society more widely and deeply than ever before. Pocket calculators, electronic watches, miniature colour television receivers and the like are only some of the examples of the miniaturization of electronics of which the general public first became awar…
The CNDO method for transition metals in the UHF version has been used to study the equilibrium of configuration isomers of tetrahedral and square-planar tetrafluoro and tetrabromo complexes of the first transition row atoms in the oxidation degree II (Mn(II), Fe(II), Co(II), Ni(II), Cu(II) both in low-spin and in hig…
Measurements of creep by the indentation with Knoop indenter were performed for sintered UO2 pellets before and after irradiation and a non-irradiated single crystal with an applied load of 50 g. Room temperature creep of non-irradiated sinters included grain boundary sliding. The creep at the lowest dose (7.8×1014 fi…
Zr-0.5 wt% Nb alloy in the α-solid solution condition was electron irradiated at 4.5 K with 3 MeV electrons. Interaction of migrating self-interstitials with the solute atoms was determined by examining the residual-resistivity recovery behaviour of this irradiated alloy. It was found that niobium atoms act as effecti…
高分解能蛍光X線装置で幾つかの化合物のAlKαスペクトルを測定し, AlKαによるAlイオンの配位状態分析方法について詳細な検討を行った. その結果, まず, AlKαのシフトとプロファイル両方から単一配位と混合配位状態の判別方法を確立した. また, アンダルサイト中の5配位Alイオンの測定結果と分子軌道法による理論計算結果により, 5配位Alイオンのシフトは4配位と6配位のシフト領域の間の中間領域に入ることを証明した. それを踏まえ, シリマナイト中のAlイオンは5配位ではなく, 4配位と6配位の混合であることと, CaO・6Al2O3中のAlイオンは4配位と6配位の混合ではなく, 5配位と6配位の混合であることを明らかにした.…
Observations concerning contact dermatitis to derivatives of isothiazolin-3-one are reported. A systematic review of the literature of previously published cases is reported. A verified contact dermatitis to benzisothiazolin-3-one of a laborer in a rubber factory is discussed. Another case of occupational dermatitis c…
The effect of the spherical aberration on an electron probe with a moderate Gaussian diameter of 4.4 nm was investigated. The probe diameter was measured from the blurring of the bright field STEM image of the sharp edge of the molybdenum trioxide crystal plate for various convergence semi-angles of the probe ranging…
Pour mieux comprendre les réactions naturelles entre solutions et plagioclases, on a étudié expérimentalement la réaction 2NaAlSi3O8 + CaCl2 ⇌ CaAl2Si2O8 + 4SiO2 + 2NaCl On approche l'équilibre en partant d'une solution purement calcique et d'un gel sodi-calcique, car la réaction est rapide dans le sens de la formatio…
The UV-VIS diffuse reflectance and IR transmission spectra of MgO–CoO solid solutions show that the frequency of both electronic and vibrational transitions changes with x molar fraction of CoO. In particular: (i) the energy of the 4T1g(P)←4T1g(F), 4A2g(F)←4T1g(F), and 4T2g(F)←4T1g(F) transitions varies linearly with…
Recrystallization in Cu and Cu–Al alloys has been investigated by the aid of in situ experiments with a 3 MV electron microscope. The results are summarized as follows: (a) Recrystallization generally becomes difficult to occur in crystals with low stacking fault energies (LSFE-crystals) because of small crystal-rotat…
Abstract Slip traces were studied on high purity iron single crystals after deformation in tension in the temperature range from 4.2 to 473 K (the same crystals were used for the work‐hardening study described in Part I of this paper). By evaluation of Nomarski interference contrast and by method of repolishing of the…
CR-39 plastic sheets have been tested for their response to protons, deuterons, and alpha particles. The enlargement of the latent damage trail has been studied (a) under varying experimental conditions, and (b) as a function of energy, restricted energy loss, and Z2 crr/β2 of the light charged particles. The critical…
Abstract The heats of immersion, in water, of corn starch U. S. P. and a directly compressible corn starch were determined as a function of moisture content. This study, in conjunction with an equilibrium vapor phase adsorption study, allowed the thermodynamic parameters characterizing the two systems to be calculated…
In this paper, we present a study of the dielectric relaxation of p-phenyl-benzylidene p'-butylaniline. When the electric field is perpendicular to the optical axis, an absorption domain due, in particular, to the rotation of the molecules round their longitudinal axis is observed. At the transition SB → SE, the criti…
Phosphorescence enhancement induced by hydrogen adsorption is observed on UV-excited MgO powders in vacuo. The main peak of the spectrum is at 3.2 eV with a sub peak at 2.3 eV. The enhancement depends on the gas pressure and sample temperatures and the phosphorescence is quenched by the light illumination at 2.5 eV af…
Rb2O-, K2O-, Na2O-及びBaO-TiO2の2成分系のガラスをスプラット・クェンチング法により作製し, ガラス生成領域を決定するとともに, ガラス中のTi4+の酸素配位数を赤外線分光法 (IR) 及び光音響分光法 (PAS) により推定した. 電子線回折で確認したガラス生成領域は推定冷却度が高くなると広く, また添加酸化物の塩基度が大きいほどガラスを生成しやすい傾向を示した.これらガラスのPASスペクトルはIRスペクトルよりもTi4+の酸素配位数の変化を反映する傾向を示した. 2成分チタネートガラス中ではTi4+(4) とTi4+(6) が共存し, その存在割合を支配する因子はガラスの塩基度と考えられた. PASスペ…
Visually smooth and adherent deposits of molybdenum have been obtained electrolytically on a copper, a nickel and a molybdenum substrate in a KF-B2O3–K2MoO4 fused salt at temperatures of 1023–1173 K and current densities of 110–990 A/m2 with a molybdenum or a graphite anode.
L'uchucchacuaïte est associée à : galène, alabandite, bénavidésite, sphalérite, pyrite, pyrrhotite et mispickel dans la minéralisation télescopée de Uchuc-Chacua (Pérou). L'analyse à la microsonde électronique donne Pb 34,8 ; Sb 34,4 ; Ag 5,9 ; Mn 2,8 ; Fe 0,2 ; S 21,1 ; Se 0,3 ; total 99,5 %. Formule : Ag0,98(Mn0,91F…