Materials Literature
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T(3)-gauge model of defects based on the gauge Lagrangian quadratic in the gauge field strength is considered. The equilibrium equation of the medium is fulfilled by the double curl Kroner's ansatz for stresses. The problem of replication of the static edge dislocation along third axis is analysed under a special, tho…
Depending on the temperature, the C70 solid crystallizes in several structures. At high temperature (T > 340K), the ellipsoidal C70 molecule rotates freely in all directions and may be treated as a uniform thick spherical shell with inner and outer radii as the minimum and the maximum distance of C-atom from the cente…
We calculate the pyrocoefficient, static dielectric susceptibility profiles and its thickness dependence of ferroelectric thin films. Also, the temperature dependences of above quantities have been calculated. For the calculations we use Landau phenomenological theory, leading to Lame equations. These equations subjec…
PEG-diacrylamide was synthesized and utilized to make materials for tissue engineering. Acrylamide groups readily react with thiol groups, and peptides containing a single thiol group were coupled to the PEG-diacrylamide in aqueous solution at room temperature in about 2 h. If only a portion of the acrylamide groups w…
Abstract In this work a morphological description of poly(vinyl alcohol) (PVA)/poly(vinyl acetate) (PVAc) incompatible blends was carried out combining scanning electron microscopy, epifluorescence microscopy, and fluorescence microspectroscopy, and using anthracene and fluorescein probes dissolved in the polymer blen…
Abstract The crystallization behavior of polyamide 66 under high pressure up to 2500 bar was investigated by the use of dilatometric and calorimetric techniques in nonisothermal and isothermal conditions. The solid–solid Brill transition is detected from the evolution of the specific volume in the PVT diagram. The var…
Two new vanadoselenites, [SeV(3)O(11)](3)(-) and [Se(2)V(2)O(10)](2)(-), were synthesized by reacting SeO(2) with VO(3)(-). Single-crystal X-ray structural analyses of [(n-C(4)H(9))(4)N](3)[SeV(3)O(11)].0.5H(2)O [orthorhombic, space group P2(1)2(1)2, a = 22.328(5) A, b = 44.099(9) A, c = 12.287(3) A, Z = 8] and [[(C(6…
Abstract The influence of vinyl ester/styrene network structure on thermal and mechanical properties was investigated. The crosslink density of the resins was altered by changing the molecular weight of the vinyl ester oligomer and by varying the amount of styrene used during the crosslinking reaction leading to varia…
An irreversible trans→cis isomerization of the imino group occurs during the irradiation of the new ferrocenyl Schiff-base polychlorotriphenylmethyl radical 1 by light. Low-temperature ESR investigations of frozen solutions revealed that the cis isomer exists as the (cis-1)2 dimer with strong antiferromagnetic interac…
A number of bacteria have been identified that aggravate corrosion of metals such as carbon steels, cast irons, stainless steels, aluminum alloys, and copper alloys. These are classified as aerobic and anaerobic according to their ability to grow in the presence or absence of air. They survive under a wide range of te…
Supported, air stable, and reusable hydroformylation catalysts have been prepared by immobilizing dinuclear rhodium(II) complexes bearing ortho-metalated arylphosphane ligands on amorphous silica and mesoporous MCM-41 supports by phosphane tethers. The oligosilsesquioxane model complex of the catalytic site 1 has been…
Abstract We prove that any global bounded solution of a phase field model tends to a single equilibrium state for large times though the set of equilibria may contain a nontrivial continuum of stationary states. The problem has a partial variational structure, specifically, only the elliptic part of the first equation…
We present experimental and theoretical results related to multiatom resonant photoemission, in which the photoelectron intensity from a core level on one atom is influenced by a core-level absorption resonance on another. We point out that some prior experimental data has been strongly influenced by detector nonlinea…
We have indented the surface of ice at temperatures between -1 \ifmmode^\circ\else\textdegree\fi{}C and -17 \ifmmode^\circ\else\textdegree\fi{}C with sharp atomic force microscope tips. For a thick viscous interfacial melt layer, a Newtonian treatment of the flow of quasiliquid between the tip and the ice suggests tha…
Low-energy electron diffraction and density-functional theory calculations are used to examine the adsorption properties of CO and ${\mathrm{N}}_{2}$ on ${\mathrm{RuO}}_{2}(110).$ Both molecules adsorb over the coordinatively unsaturated Ru sites (cus-Ru atoms) with their molecular axes normal to the surface plane. Th…
Folded drops: A skinlike folded drop surface is formed by the coadsorption of two components from different phases at the chloroform/water interface. Both pure β-lactoglobulin and mixtures of α-dipalmitoylphosphatidylcholine (DPPC) and β-lactoglobulin can form the skinlike film; the lipid accelerates this process by c…
We combine Raman scattering, optical absorption, and x-ray spectroscopies to determine the Zn content in $(\mathrm{ZnS}{)}_{x}(\mathrm{CdS}{)}_{1\ensuremath{-}x}$ nanometer-sized semiconductor particles precipitated in glass. We propose that the evolution of the Zn/Cd concentration ratio in particles can be understood…
Synthesis and photophysical/photochemical investigations of 1,8a-dihydro-2,3-bis(2,5-dimethy-3-thienyl)-azulene-1,1-dicarbonitrile (1A) and 1,8a-dihydro-2,3-diphenylazulene-1,1-dicarbonitrile (2A) are reported. The photoprocesses and thermal reactions of systems 1 and 2 were studied by time-resolved and steady-state t…
In this paper we investigate the time-resolved and stationary photoluminescence (PL) of silicon nanocrystals fabricated in a silicon oxide matrix. The PL intensity reveals a nonexponential decay for all temperatures which can be fitted by a ``stretch''-exponential function. From 60 down to 5 K an increase of decay tim…
AIMS: The study was attempted to determine the ability of a Gram-positive Bacillus cereus UW85 strain to biosynthesize poly (3-hydroxybutyrate) copolymers when epsilon-caprolactone, or epsilon-caprolactone and glucose, were used as carbon sources. METHODS AND RESULTS: Bacillus cereus was grown for 24 h under nitrogen-…