Materials Literature
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The crystal structure of the gene product of At3g21360 from Arabidopsis thaliana was determined by the single-wavelength anomalous dispersion method and refined to an R factor of 19.3% (Rfree = 24.1%) at 2.4 A resolution. The crystal structure includes two monomers in the asymmetric unit that differ in the conformatio…
We report measurements of the dielectric loss in a series of monovalent metaphosphate glasses at cryogenic temperatures. An analysis of the scaling properties of the dielectric response reveals a nonionic contribution to the loss present only in glasses for which the conduction cation is constricted by the oxide netwo…
Photoinduced magnetization following a stretched exponential growth with time is observed in ${\mathrm{La}}_{0.9}{\mathrm{Ca}}_{0.1}{\mathrm{MnO}}_{3}$ films exposed to near infrared light in magnetic fields of $\mathit{B}\ensuremath{\geqslant}0.1\phantom{\rule{0.3em}{0ex}}\mathrm{mT}$. The magnetic irreversibility ob…
Abstract A series of reactive fluorescent dyes were successfully synthesized and their structure was proven by IR spectra, NMR spectra, elemental analysis, and mass spectra. The fluorescence performance 6‐amino‐2(‐3‐phenyl‐propyl)‐benzo[de]isoquinoline‐1,3‐dione and 2‐benzyl‐6‐hydroxy‐benzo[de]isoquinoline‐1,3‐dione a…
Mesoporous aluminophosphate materials with variable amounts of zirconium have been synthesized at room temperature using a nonionic surfactant tri-block copolymer (PEO(20)PPO(70)PEO(20)) as the structure-directing agent. Powder X-ray diffraction of as-synthesized and calcined AlPO and ZrAlPO mesoporous materials shows…
Wedged Mg–Y films with compositions ranging from pure Mg to Mg0.83Y0.17 were grown by dc-magnetron sputtering and hydrogenated. Mg1−xYx forms a substitutional alloy, ranging from 0 to at least 17at.% in thin films. The c lattice parameter of the film containing 17at.% of yttrium is determined to be approximatively 1%…
The microwave dielectric properties of the (Ba,Sr)TiO3 thin films annealed at various oxygen pressures ranging from 5to500mTorr were investigated over the frequency range 0.5–5GHz using a circular-patch capacitor geometry. The dielectric constant (ε) followed Curie–von Schweidler relaxation in the microwave-frequency…
Spin dynamics and magnetic frustration effects in La0.5Sr0.5Co1−xFexO3 (0⩽x⩽0.6) compounds were systematically studied by means of resistivity, dc magnetization, ac susceptibility, and electron-spin-resonance spectra. The Fe substitution caused a metal-semiconductor transition for x⩽0.3 compositions whereas the only s…
Abstract Finely dispersed blends of polyamide 6 (PA‐6) and poly(ethylene terephthalate) (PET) were obtained by direct injection molding throughout the full composition range. The blends comprised a probably pure PA‐6 phase, and a PET phase that was apparently pure in PET‐rich blends and contained slight reacted PA‐6 a…
The adsorbate-substrate interaction for Na and K on highly oriented pyrolytic graphite (HOPG) has been investigated by photoemission and by density functional calculations. With increasing coverage a peculiar spectral structure develops below the Fermi level reminiscent of the one observed for $\mathrm{Cu}∕\mathrm{Xe}…
A combination of piezoresponse force microscopy and x-ray diffraction sin2Ψ stress measurement have been used to investigate domain evolutions in (111)-oriented Pb(Zr0.55Ti0.45)O3 (PZT) and (115)-oriented SrBi2Ta2O9 (SBT) thin films with the repeated switching cycles (fatigue process). In the PZT film, it has been fou…
Two isomers of [Ni( α - rac -L)](ClO 4 ) 2 and [Ni( β ‘- rac -L)](ClO 4 ) 2 were prepared, and their configurations and reaction properties were investigated (L = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane). Reactions of [Ni( α - rac -L)](ClO 4 ) 2 isomer with HBDC -, BDC 2-, and pyca - ligands give s…
A structural study of the thermal evolution of Ni(0.69)Cr(0.31)(OH)(2)(CO(3))(0.155) x nH(2)O into NiO and tetragonal NiCr(2)O(4) is reported. The characteristic structural parameters of the two coexisting crystalline phases, as well as their relative abundance, were determined by Rietveld refinement of powder x-ray d…
This paper describes a simple strategy for the formation of photoaligned and micropatterned discotic liquid crystal (DLC) film on the surface of photoirradiated azobenzene-containing polymer thin film. The key material for the surface-mediated photoalignment of the DLCs was poly[4-(4-cyanophenylazo)phenyl methacrylate…
The influence of a vertical magnetic field and of surface tension on the stability of thermogravitational convection in an infinite layer subject to a horizontal temperature gradient is investigated through a linear stability analysis. Magnetic field is found to strongly stabilize the flow, as well as surface tension…
We have studied the charge disproportionation phenomenon in CaFeO3 using the local-spin density approximation with the on-site Coulomb interaction parameter U and exchange parameter J. The calculation reveals that the total number of the 3d electrons is about 5.1 for both Fe(1)(Fe5+) and Fe(2)(Fe3+) atoms, and that th…
In the present paper the possible DNA damaging effects of ultrasound in occupationally exposed medical personnel were investigated using the alkaline comet assay. The extent of DNA migration in peripheral blood leucocytes was measured. Parameters of the comet assay were studied in 30 medical workers occupationally exp…
Abstract This article investigates the effect of diol structure and acetoacetylation of the hydroxylated polyesters (HPs) on thermal stability and degradation profiles of HPs/hexamethoxymethylmelamine (HMMM) as well as HPs/diphenylmethane diisocyanate (MDI) high solids coatings (HSCs) by thermogravimetry. Thermal stab…
Abstract Investigated in the present study are the physical properties, morphology, and structure of PP/N6 alloy filaments (10, 20 wt % N6) made with or without PP‐ g ‐MAH as compatibilizer. The alloy filaments produced at the take‐up speeds of 300 and 800 m/min were drawn with draw ratio of 3.5 and 2, respectively. S…
The Pyrococcus horikoshii OT3 protein PH0500 is highly conserved within the Pyrococcus genus of hyperthermophilic archaea and shows low amino-acid sequence similarity with a family of PIN-domain proteins. The protein has been expressed, purified and crystallized in two crystal forms: PH0500-I and PH0500-II. The struct…