Materials Literature
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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…
Professor Stefan Bergman [1] introduced the idea of Repräsentantenbereich of a bounded domain in ℂn. However the strict definition of a representative domain is not very clear as noted in [2]. It seems that he called the image f( ) of the mapping f: 1 $$ {\text{z}} \to \frac{{\partial \log \frac{{{\text{k}}({\text{z}}…
A pseudo weak phase object approximation to the principle of image formation in high resolution electron microscopy is presented. It is pointed out that there is the possibility of preferential revealing lighter or heavier atoms in the crystal structure in high resolution electron micrographs by choicing different cry…
Laser flash excitations at 640 nm have been used to generate the transient spectra of the lowest-lying 3ππ* state of phthalocyaninatoruthenium(II) complexes. The properties of this excited state such as the positions of the maxima, λmax.= 500 ± 30 nm, and lifetimes, t½= 70–4 500 ns, exhibit a large dependence on the e…
Multilayer coatings for high-power laser mirrors and lenses have been optimized by a particular constrained gradient method to reach together with a reduction of damage threshold (i.e., suppression of the peak electric field), good values of optical parameters (reflectance or transmittance). The problem has been solve…
Electrochemical studies of corrosion of Ni, Fe and their alloys have been made in molten carbonate at 973 K by using potentiodynamic polarization and polarization resistance methods. It was concluded that metallic corrosion in molten carbonate was well explained by the mixed potential theory. Partial cathodic reaction…
The cell division rates of ten species of attaching diatoms isolated from Ago Bay were measured on the bottom of the culture vessel with running nutrient-poor natural seawater under the illumination of 4000 lx with a dark/light cycle of 10/14 hours at ca. 19°C. The exchange rate of running seawater through the culture…
This paper describes the light-microscopic observations of polystyrene latexes with spherical particles of two different diameters, d and 1.4–1.9d. Polystyrene latexes are available for simulating real structures in intermetallic compounds. An amorphous state appeared for a few hours after stirring or vibrating the la…
Glucosamine-6-phosphate synthetase from Escherichia coli K-12 is progressively inactivated L-beta-(2,3-epoxycyclohexyl-4-on)alanine (anticapsin). With increasing concentrations of anticapsin the reaction exhibits rate saturation: the minimum inactivation half-time is 1.15 minutes, with a Kin alpha ct of 2.5 microM. Gl…
We have recently developed a method of nucleation of large perfect monocrystallites of Blue Phases on glass surfaces. We have obtained spectra of Bragg-reflected light on such crystallites of BPI and show that they can be very easily interpreted in terms of the dynamical theory of light diffraction. From a comparison…
Within the general framework of Landau-de Gennes theory for nematic liquid crystals it is shown that the difference of flexoelectric coefficients e* = e1 - e3 ∼ S2 , where S is the nematic order parameter. This result agrees with the molecular theory but is in contradiction with recent measurements of the constant e*…
A Moraxella strain capable of utilizing 1, 4-type polybutadiene as a sole source of carbon was isolated from soil. About 40% of polybutadiene having a number average molecular weight (Mn) of 2, 350 was degraded and assimilated by the strain in 5 days. A polybutadiene sample with an Mn of 16, 100, however, was hardly d…
(1984). The influence of relative humidity in the polymerization of methyl trimethoxy silane. Studies in Conservation: Vol. 29, Preprints of the Contributions to the Paris Congress, 2-8 September 1984. Adhesives and Consolidants, pp. 177-181.
The results of a neutron diffraction study on U0.5Np0.5 O2 solid solution at low temperature are reported. Below T = 12 K the solid solution is magnetically ordered with a magnetic structure different from that of the UO2 low temperature phase. The temperature dependence of the observed magnetic line width could sugge…
Stationary behavior is investigated by plotting the stationary polarization curves (I,V) and by examination of the dissolution morphology with scanning microscopy. It is shown that in 4 M deaerated HCl, the TU2 alloy dissolves more rapidly than the unalloyed titanium T40, whereas the TA6V alloy dissolves less rapidly.…
In this account, a systematic enumeration of 109 littoral and epiphytic diatoms of the south west coast of India is presented. This work forms a supplement to the available information regarding the diatom flora of the Indian Seas.
The crystal structures of K3Sn2(SO4)3X (X = Br or Cl) have been determined by the heavy-atom method and refined by the full-matrix least-squares method to R= 0.0564 for the bromide and 0.0839 for the chloride. The crystals of both compounds are of the hexagonal space group P63(C66, no. 173) with a= 10.256(2), c= 7.582…
Geometrical relationships between fabric and sewing thread are developed for lock- stitch seams in plain woven fabrics. The tendency to pucker is associated with structural jamming within the fabric. Jamming increases with stitch count and decreases with thread size as reported in earlier studies.