Materials Literature
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The effect of conformation (E/Z isomerism), nature (donor/acceptor) of substituents, and endgroups (indandione, pyrazolone, pyrazoledione) on the molecular hyperpolarizability βvec of dicyanomethylene (hetero)aromatic dyes is investigated by means of semiempirical (AM1, ZINDO) molecular orbital calculations. Unless Z…
A neutron diffuse scattering experiment on the relaxor ferroelectric PZN(PbZn1/3Nb2/3O3) has been carried out. The diffuse scatterings show strongly anisotropic distributions around the reciprocal lattice points, whose patterns change drastically depending on the index of the reciprocal lattice point. These experiment…
—An examination was made of the adhesion of nylon-6 resin to treated metals such as phosphor bronze, brass plates, and electronickel platings during injection molding. No adhesion to any of these metals was noted to occur under ordinary injection molding conditions and an aqueous solution of 1,3,5-triazine-2,4,6-trith…
The rigid pendant-arm macrocyclic ligand 1,4,7-tris(2-aminophenyl)-1,4,7-triazacyclononane (L1) has been synthesized. It reacts with divalent first row transition metal perchlorate salts to yield complexes of general formula [MII(L1)][ClO4]2 (M = FeII, NiII, CuII or ZnII). Single crystal X-ray crystallography indicate…
The Raman spectra of cadmium tris(thiourea) sulphate (CTS) single crystals were studied in the wavenumber range from 400 to 650 cm−1 for temperatures between 10 and 300 K. Two phase transitions occurring at 55 ± 2 and 134 ± 2 K were observed and characterized. Based on the evolutions of the spectral parameters (wavenu…
In designing EHV transmission systems, specific knowledge about the creepage distance of the insulator, which is subjected to adverse environmental contamination, is important. Various system components' configurations can be properly coordinated through the appropriate application of the relationship between insulato…
A novel in situ spectroelectrochemical cell has been constructed for the simultaneous measurement of fluorescence and current-voltage characteristics during redox cycling. This involves the use of a detachable rotating disc electrode (RDE), which allows the characterisation of luminescent redox active films produced e…
Ornamentation of the cell wall with special reference to granule density was evaluated as a taxonomic criterion for separating seven infraspecific taxa of Pediastrum boryanum (Turpin) Meneghini (Sphaeropleales, Chlorophyta). Twenty-two isolates from Danish lakes and three isolates from the culture collection in Göttin…
The high-speed melt spinning of sheath/core type bicomponent fibers was performed and the change of fiber structure with increasing take-up velocity was investigated in comparison with the results of our previous study. Two kinds of polyethylene, high density and linear low density (HDPE, LLDPE) with melt flow rates (…
The crystallisation, crystal structures, and crystal packing of [Mn(phen)3]I7 and [Fe(phen)3]I7 are reported. The crystal lattices are isomorphous, but there are informative small differences between the two structures. The [M(phen)3]2+ complexes occur as parallel (P4AE)∞ chains, forming two parallel fourfold aryl emb…
A new sublimation method of material purification in a vacuum based on the crystal-vapor-crystal phase transformation is outlined. A basic design of growth reactor and the main parameters of CdTe fine purification are given. With the use of low-temperature photoluminescence (PL), the purification dynamics are revealed…
We derive the equations of motion for N spherical and massless bubbles in an incompressible and irrotational liquid. The bubbles’ motion is assumed to be at high Reynolds, low Weber number and collisionless. External acoustic driving and viscous dissipation are included. In particular, we focus on the interplay of the…
Exponential polynomials are the building bricks of spectral synthesis. In some cases it happens that exponential polynomials should be extended from subgroups to whole groups. To achieve this aim we prove an extension theorem for exponential polynomials which is based on a classical theorem on the extension of homomor…
All articles of this category A "3 + 1" methodology has been developed for the synthesis of novel porphyrin analogues with carbon rings in place of one or more of the usual pyrrole units. This approach involves the acid catalyzed condensation of a tripyrrolic intermediate (tripyrrane) with dialdehydes, followed by oxi…
A diatom biostratigraphic study of the Maruyama Formation in the Makarov and Dolinsk areas of the southern part of Sakhalin Island indicates that its geologic time span ranges from ca. 14 Ma to 3.5 Ma or possibly younger, which is much longer than previous estimates (e.g. 9.5-5.3 Ma by Ingle, 1992). A middle Miocene a…
Effects of the Jahn-Teller (JT) distortion and the strong electron-electron correlation on the electronic structure of perovskite oxides ${\mathrm{LaMnO}}_{3}$ are studied by using the linear muffin-tin orbital method. Results show that the Jahn-Teller distortion has evident influence on the electronic structure and i…
It was found that an amorphous Mg62Ni33Ca5 alloy absorbs a large amount of hydrogen at 323 K and the hydrogen content is much larger than that of the corresponding crystalline alloy. The maximum absorption concentration of hydrogen at 323 K is 2.3 mass% in the amorphous phase and 1.3 mass% in the crystalline state. Th…
A detailed finite-difference approximation of equations of the model for crystal pattern formation in a solidifying binary alloy is given. The stability of the numerical scheme obtained is investigated and the criterion of von Neumann for computing stability is defined. A solution of the finite-difference equations si…
The main tendencies in the formation of local magnetic moments and hyperfine magnetic fields at Fe nuclei in Fe-Sn and Fe-Si alloys at low metalloid concentrations are analyzed on the basis of “first-principles” calculations. The results of calculations are compared with experimental data. The main differences between…
Austenitic stainless steels are currently known to have irradiation-assisted stress corrosion cracking (IASCC) susceptibility when exposed to critical neutron irradiation in pure water environment at high temperatures. Since the radiation induced segregation (RIS) at grain boundaries (GBs) has been considered as a pre…