Materials Literature
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We present the results of x-ray diffraction and x-ray absorption spectroscopy experiments in CuAlO(2) under high pressure. We discuss the polarization dependence of the x-ray absorption near-edge structure at the Cu K-edge. XRD under high pressure evidences anisotropic compression, the a-axis being more compressible t…
Abstract The interaction of pure capillary waves with boundaries that constrain the contact line are of interest for problems involving liquids contained by minimal solid contact for applications in low gravity and at small scales in normal gravity. Time-harmonic capillary waves on a liquid cylinder axially incident o…
Dissymmetric π-conjugated monomers and oligomers incorporating 3,4-ethylenedioxythiophene (EDOT) units and bearing terpyridine end groups were synthesized in good yields through Vilsmeyer-Haak formylation followed by a reaction with 2-acetylpyridine in basic media or, for the longest oligomers, direct C-H bond arylati…
This article focuses on the possibility of exciting some lanthanides (Ce(3+), Tb(3+), Gd(3+), and Eu(3+)) by ultrasound in aqueous solutions. Depending on the lanthanide ions and on the acoustic cavitation conditions (single-bubble or multibubble systems), the excitation mechanism is shown to be photoexcitation (e.g.,…
In this paper, the mixed alkalis, namely Ca(OH)2 and NaOH, were used to disrupt soy protein. The structure characteristics and thermal properties of soy protein treated by Ca(OH)2 and NaOH were studied by FT-IR and Differential scanning calorimetry (DSC). The results showed that soy-based adhesive by the mixed alkalis…
Density functional theory (DFT) based calculations are used here to investigate the magnetic behavior, spectroscopic transitions, and possible photomagnetic properties of stilbene derivatives using photochromicity of cis- and trans-forms of the parent molecule. Nitronyl nitroxide (NN), iminonitroxide (IN), tetrathiafu…
The article is devoted to the theoretical study of magnetocaloric effect in imhomogeneous ferromagnets in vicinity of magnetic phase transitions of first and second orders as well as in vicinity of tricritical and critical points. In the frame of Landau theory the formulae for the magnetic field induced entropy change…
Spaltung mit V: Ein neuer Oxovanadium-Katalysator (V-MPS; siehe Schema) wurde in den Poren von mesoporösem Siliciumdioxid immobiliert. Der Einsatz von V-MPS in Kombination mit Lipasen ermöglichte die dynamische kinetische Racematspaltung von Alkoholen der Form 1 oder 2 unter Bildung optisch aktiver Ester 3 in hohen ch…
We study the electronic structures of $ABA$ (Bernal) -stacked multilayer graphenes in a uniform perpendicular electric field, and we show that the interplay of the trigonal warping and the potential asymmetry gives rise to a number of emergent Dirac cones nearly touching at zero energy. The band velocity and the energ…
This work reports on the efficient cooperative upconversion and infrared cascade downconversion emissions in a novel Y₈V₂O₁₇:Eu:Yb nanophosphor. The excitation with UV light produces emission in the 950-1000 nm region, corresponding to the Yb³⁺:²F₅/₂-->²F₇/₂ transition, as well as visible emissions of the Eu³⁺ ion. Ti…
The moisture transport in fabrics determines its cooling effect and therefore the wearing comfort during sudorific activities. When liquid sweat is present, the moisture absorption by a fabric is characterized by the in-plane and transplanar wicking. We investigated the effect of fabric structure and fiber count on wi…
Environmentally valuable composites would be made by replacing synthetic fibers with various types of natural cellulose fibers.The most significant factor in finding good fiber reinforcement in the composite is the strength of the bond between matrix polymer and fiber.Due to the presence of hydroxide and other polar g…
Two groups of amine-functionalized organosilicas have been synthesized: amorphous polysiloxane xerogels (APX) and ordered mesoporous organosilicas (OMO) by co-condensation of tetraethoxysilane and appropriate alkoxysilanes: aminopropyltriethoxysilane and N-[3-(trimethoxysilyl)propyl]ethylenediamine. The obtained mater…
We analyze the phase diagram for a system of weakly coupled electrons having an electron- and a hole-band with imperfect nesting. Namely, both bands have spherical Fermi surfaces, but their radii are slightly different, with a mismatch proportional to the doping. Such a model is used to describe the antiferromagnetism…
In this study, various forms of non-woven waste were recycled for the manufacture of composites by the extrusion technique. The performance of the composites, as well as the effect of the reprocessing steps, was investigated with regards to the mechanical and thermal properties. A reinforcement material of polyester n…
A non-fire-retardant and a fire retardant polyurethane foam are tested under a nitrogen environment using thermogravimetry at different heating rates of 1, 5, 20 and 60 °C min −1 to obtain the foams’ decomposition behaviours. During decomposition, both foams experience two major mass loss reactions with the second rea…
New dispersants were investigated for the preparation of MnO2 and composites by electrophoretic deposition (ED). The investigation of molecules from salicylate, phenolate, catecholate, and phthalate families allowed the comparison of different mechanisms, which provided dispersant bonding to the MnO2. The deposition y…
We show that hot phonons emitted in energy conversion or resistive processes can be converted to electric potential in heterobarrier structures. Using phonon and electron interaction kinetics and self-consistent ensemble Monte Carlo, we find the favorable conditions for unassisted absorption of hot phonons and design…
Plusbacin-A3 (pb-A3) is a cyclic lipodepsipeptide that exhibits antibacterial activity against multidrug-resistant Gram-positive pathogens. Plusbacin-A3 is thought not to enter the cell cytoplasm, and its lipophilic isotridecanyl side chain is presumed to insert into the membrane bilayer, thereby facilitating either l…
The smecticA-hexaticB phase transition was studied in a homeotropic single domain sample and in a non-aligned sample of n-hexyl-4'-n-pentyloxybiphenyl-4-carboxylate liquid crystal compound to probe the effect of different amount of defects on the phase transition. The specific heat, the thermal diffusivity and the ent…