Materials Literature
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Abstract Structural pseudosymmetry is a fundamental property to be considered when trying to predict structural phase transitions at high temperatures. In the present work, two methods for detecting and characterizing pseudosymmetry, the here-called atomic displacements and electron density methods are briefly introdu…
Control of product characteristics during production is very important to achieve improvement in quality. This importance come into consideration in yarn texturing because of high demand for textured textiles. In this investigation, new methods are introduced for the determination of air-jet textured yarn's structure,…
Exemplarisch wird aufgezeigt, welche wichtige Rolle funktionale Polymere im täglichen Leben spielen. Mit diesen polymeren Wirkstoffen lassen sich bereits mit geringsten Einsatzmengen große Effekte erzielen. Anwendung finden funktionale Polymere in Wasch- und Reinigungsmitteln, der Papier- und Textilherstellung, sowie…
An “ionic(I)–ionic(II)” charge-transfer transition has been observed in a new molecular solid composed of dineopentylbiferrocene (D) and fluorotetracyanoquinodimethane (A). The material is a monovalent solid (D + A 3 - ) at room temperature and changes to a divalent solid (D 2+ A 3 2- ) at low temperatures, in associa…
Abstract The formation process of the α- and β-Keggin-type [PW12O40]3− complexes was investigated in an aqueous 50 mM (M = mol dm−3) W(VI)–5.0 mM P(V) system. The 31P NMR study confirmed the formation of A-α-[PW9O34]9−, A-β-[PW9O34]9−, α-[PW11O39]7−, and β1-[PW11O39]7− on acidification of an alkaline solution of WO42−…
The powder synchrotron X-ray diffraction technique was used to study the temperature evolution of the structural properties of the mixed valence rare earth fulleride, Yb 2.75 C 60, in the temperature range 5−295 K. The large lattice expansion (negative thermal expansion) on cooling below 60 K provides an unambiguous s…
Morphology of kaolinite crystals with high-crystallinity (Keokuk, Iowa) has been investigated by electron back-scattered diffraction (EBSD) and high-resolution scanning electron microscopy (SEM). EBSD patterns from the specimen generally correspond to those expected from ordered kaolinite. Elongated hexagonal crystals…
Cathodoluminescence (CL) properties of various kinds of organic material were investigated for the purpose of staining biological specimens and obtaining CL images. Several kinds of organic light emitting device (OLED) material exhibited CL. The europium complex, Eu(dbm)3(phen), showed the strongest CL signal and was…
Nucleation is of great concern in many cases---for example, the production of artificial rainfall and the synthesis of advanced amorphous alloys. Although exact solutions have been well known to both homogeneous nucleation and heterogeneous nucleation occurring on a large flat container wall, yet in more general situa…
Abstract Intermediate members of the grossular–andradite and grossular–uvarovite series are known to display anomalous birefringence, which is inconsistent with the ideal cubic space group of garnet Ia d . To determine the reason for such birefringence, the crystal structures of at least 15 samples were refined by dif…
Abstract Buttons of high-temperature shape-memory alloy Ni56Mn25–xFexGa19 were prepared by arc melting under argon atmosphere. The specimens were hot rolled to 1 mm plates, and their martensitic transformation behaviors, ductilities, and shape-memory effects were investigated through differential scanning calorimetry…
Peculiar light-matter interactions can break the rule that a single beam polarization can address only two states in an optical memory device. Multistate storage of a single beam polarization is achieved using self-induced surface diffraction gratings in a photoactive polymer material. The grating orientation follows…
As a key component for a future power substation system entirely consisting of solid insulating materials, a special connection system between different pieces of power equipment has to be developed. A soft dielectric such as silicone rubber and a hard one such as epoxy resin are to be used for this connection. This p…
We consider the imbibition of a liquid droplet into a deformable porous substrate. The liquid in the droplet is imbibed due to capillary suction in an initially dry and undeformed substrate. Deformation of the substrate occurs as the liquid fills the pore space. In our model, a pressure gradient in the liquid across t…
Hydrogen distributions around non-metallic inclusions in steels are successfully characterized with high-resolution tritium autoradiography. The autoradiographs show that hydrogen accumulation characteristics around the inclusions depend on types of the inclusions. In the case of MnS, hydrogen was inhomogeneously dist…
The behavior of fission gas in all major types of nuclear fuel has been reviewed with an emphasis on more recently discovered aspects. It is proposed that the behavior of fission gas can be classified in a number of characteristic types that occur at a high or low operating temperature, and/or at high or low fissile b…
Transport, thermal and magnetic measurements have been carried out on (Pr1-ySmy)1-xCaxCoO3. The system exhibits a structural phase transition accompanied by the spin state change from the intermediate spin (IS) state to the low spin (LS) state with decreasing temperature T. We have constructed a T-y phase diagram for…
Stark sublevels of multiplets of the $4{f}^{5}$ electronic shell ion have been determined and the Judd-Ofelt intensity parameters have been calculated. Decay curves of the luminescence originating with the $^{4}G_{5∕2}$ multiplet in ${\mathrm{K}}_{5}{\mathrm{Li}}_{2}{\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sm}}_{x}{\m…
The conjugates of some kinds of anticancer agents with chitin and chitosan derivatives display good anticancer effects with a decrease in the adverse effects of the original drug due to a predominant distribution into the cancer and a gradual release of free drug from the conjugates. For instance, doxifluridine and 1-…
This paper presents geometric and algebraic algorithms and relevant optimizing operators for 3D computer modelling of yarns in fabric. New algorithms and approaches are successfully employed to create more realistic and flexible geometry models with consideration of the differential and topological structure of yarns.…