Materials Literature
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2-Enoyl-CoA hydratase 2, a part from multifunctional enzyme type 2, hydrates trans-2-enoyl-CoA to 3-hydroxyacyl-CoA in the (3R)-hydroxy-dependent route of peroxisomal beta-oxidation of fatty acids. Unliganded and (3R)-hydroxydecanoyl coenzyme A-complexed crystal structures of 2-enoyl-CoA hydratase 2 from Candida tropi…
The complex impedance of a ${\mathrm{Pr}}_{0.67}{\mathrm{Ca}}_{0.33}{\mathrm{MnO}}_{3}$ crystal has been measured. The frequency dependence is studied for a wide range of temperatures (50--403 K) and is found to be characteristic of relaxation process with a single Debye time relaxation constant, which is interpreted…
Structural characteristics of phase transformations in epitaxial ferroelectric films are analyzed via a Landau–Devonshire thermodynamic formalism. It is shown that the phase transformation temperature, the lattice parameters, and the order of the phase transformation are a strong function of the misfit strain and are…
Apart from a reflecting and a transparent state, rare-earth-Mg alloys (RE-Mg) exhibit also a highly absorbing, black state during loading with hydrogen. The occurrence of such a black state is due to the disproportionation into subwavelength size ${\mathrm{REH}}_{2+\ensuremath{\epsilon}}$ and Mg grains during the firs…
The Mie theory for electromagnetic scattering by spherical particle is extended to the case of magnetic particle with gyromagnetic type of permeability. Specifically, we first construct for the magnetic induction B(I) inside the particle a new set of vector basis functions, which are the solution of the wave equation…
Magnetic shape memory (MSM) materials change their shape with the magnetic field. They can also be used in the reverse operation as sensors or voltage generators. The present paper demonstrates that large voltages are induced when the MSM material is mechanically compressed inside a MSM actuator. The experimental resu…
Microcrystals of a hydrophobic cargo were stabilized by EAK16 II, a self-assembling oligopeptide, and suspended in aqueous solution. Pyrene was used as a model hydrophobic compound. Egg phosphatidylcholine (EPC) vesicles were prepared to mimic a cell membrane. Pyrene was released from its EAK16 II coating into EPC ves…
Luminescent thin films were fabricated using CeO2 as a host crystal and Eu3+ and Sm3+ as activators. The films were deposited on glass substrates by a spin-on/pyrolysis technique at temperatures up to 700 °C using ethanolic solutions of rare-earth acetates. A cubic fluorite-type CeO2 phase was formed at the deposition…
Magnetoelectric (ME) Pb(Zr0.52Ti0.48)O3 (PZT)–NiFe2O4 bulk composites with various PZT volume fractions were prepared. The ME coupling coefficient, impedance, and flux density versus the frequency were measured. The magnetic bias and PZT volume fraction in the composites are investigated to optimize the ME output. It…
We study by means of ab initio calculations the ideal tensile and shear strengths of the C-46 clathrate phase. While its bulk modulus and elastic constants are smaller than in diamond, its strength is found to be in all directions larger than the critical stresses associated with the diamond [111] planes of easy slip.…
A new podand ligand has been designed and synthesized which reacts hydrothermally with either Nd(III) or Gd(III) nitrate forming an array of linked metallocycles with void spaces. Discrete dodecameric water clusters occupy the voids in the structures. The structure of the cluster can be described as an open-cube octam…
Abstract Summary: Biodegradable poly[( R )‐3‐hydroxybutyrate] (P(3HB)) fibers with high tensile strength of 1.32 GPa were processed from ultra‐high‐molecular‐weight P(3HB) by a method combining cold‐drawing and two‐step‐drawing procedures at room temperature. The distribution of molecular structures in a mono‐filament…
Ce 1 - x Zr x O 2 nanoparticle sols ( x = 0−1) are synthesized by hydroxide coprecipitation of a mixed precursor solution of cerium ammonium nitrate and zirconyl chloride followed by redispersion in an aqueous medium by sonication using nitric acid as the peptizing agent. The obtained sols are highly concentrated and…
Luminescence properties of ${\mathrm{CaWO}}_{4}$ have been investigated using complementary one- and two-photon excitation techniques. Analysis of the thermal changes in the luminescence spectra indicates that the observed high-energy shift of the ${\mathrm{CaWO}}_{4}$ emission maximum is mainly caused by a change of…
Photoluminescence from charged colloidal CdSe quantum dots, with definite and controllable electron occupation, is observed. As charged nanocrystals still emit light but are transparent at the emission wavelength, the threshold for amplified stimulated emission is strongly reduced. We demonstrate 65% threshold reducti…
The conduction electron energy exchanges are investigated in gold and silver nanoparticles with average size ranging from 2 to 26 nm, embedded in different matrices. The experimental studies were performed by following the internal thermalization dynamics of photoexcited nonequilibrium electrons with a femtosecond pum…
We report on the optical properties of magnetic cobalt-doped anatase phase titanium dioxide ${\mathrm{Ti}}_{1\ensuremath{-}x}{\mathrm{Co}}_{x}{\mathrm{O}}_{2\ensuremath{-}\ensuremath{\delta}}$ films for low doping concentrations, $0<~x<~0.02,$ in the spectral range $0.2<~\ensuremath{\Elzxh}\ensuremath{\omega}…
We report neutron powder diffraction measurements on a series of NaxCoO2 samples with x near 0.75 which were prepared under different synthesis conditions. Two different crystal structures for the samples are observed at room temperature. The two structures differ primarily by a shift of a large fraction of the Na ion…
Mesostructured carbons with graphitic framework walls are conveniently prepared at ambient pressures through the replication of a mesostructured silica template using an aromatic hydrocarbon as the carbon precursor and a catalyst.
We have carried out a density functional study of unoccupied, resonance states in a single Au atom, dimers, a trimer and infinite Au chains on the NiAl(110) surface. Two inequivalent orientations of the ad-chains with substantially different interatomic distances were considered. From the study of the evolution of the…