Materials Literature
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The efficiency of imidazole and its derivatives (4-methylimidazole, 4-methyl-5-hydroxymethylimidazole, 1 phenyl-4-methylimidazole, 1-[p-tolyl]-4-methylimidazole) for corrosion inhibition of copper in 0.5 M hydrochloric acid (HCl) was investigated. Corrosion inhibition was studied using impedance spectroscopy and poten…
The hydrolytic degradation under physiological conditions of a series of poly(ester amide)s prepared from 1, n -amino alcohols and aliphatic dicarboxylic acids including succinic, glutaric, and tartaric acids was examined. Degradability was observed to increase with the content in ester groups. Poly(ester amide)s cont…
Elastic and inelastic neutron scattering has been used to study static and dynamic magnetic properties in Ca-doped ${\mathrm{LaMnO}}_{3}$ perovskites in the region of low doping (5% and 8%) and to determine the phase diagram. In addition to the spin-wave branch related to the superexchange coupling between Mn ions (fe…
Oxygen bulk diffusion rates were experimentally determined in a natural ultramylonite sample ( c . 5 μ m grain size; 15–20% biotite, 20% quartz, 60–65% feldspars, and minor Fe‐oxides) from the Gerrish Island shear zone, SE Maine, USA. The diffusion experiments were performed at 250–550 °C and 100 MPa water pressure. O…
Gadolinium-based contrast agents in angiography and interventional radiology.D J Spinosa, A H Matsumoto, K D Hagspiel, J F Angle and G D HartwellAudio Available | Share
Protein aggregation plays an important role in biotechnology and also causes numerous diseases. Human carbonic anhydrase II is a suitable model protein for studying the mechanism of aggregation. We found that a molten globule state of the enzyme formed aggregates. The intermolecular interactions involved in aggregate…
The mechanism of the heat-induced charge transfer observed in Prussian-blue compounds ${\mathrm{K}}_{1\ensuremath{-}2x}{\mathrm{Co}}_{1+x}\mathrm{Fe}(\mathrm{CN}{)}_{6}$ is studied theoretically in connection with photoinduced magnetism. In the case of $x=0,$ our first-principles band calculation confirms that the ban…
Highly oriented perovskite films of PbMg1/3Nb2/3–PbTiO3 and PbSc1/2Nb1/2O3–PbTiO3 with compositions near the morphotropic phase boundary were formed by pulsed laser deposition on La0.5Sr0.5CoO3/MgO (100). The dielectric properties of the films were studied over the frequency range of 100 Hz–1 MHz in the temperature ra…
A spectrum-inversion approach to extract information from MQ-MAS NMR spectra in glasses is presented. This allows the reconstruction of the underlying two-dimensional distribution of the isotropic chemical shift correlated to the quadrupolar interaction. The dependency upon the quadrupolar interaction and the RF field…
Both selenomethionine (SeMet) based multiwavelength anomalous diffraction (MAD) phasing and protein production in baculovirus expression vector systems have greatly enhanced the scope and speed of macromolecular crystallography, but the apparent incompatibility of these two powerful techniques presents an obstacle to…
Optical reflectivity spectra were measured on cleaved surfaces of ${\mathrm{La}}_{0.825}{\mathrm{Sr}}_{0.175}{\mathrm{MnO}}_{3}$ single crystals ${(T}_{\mathrm{C}}=283$ K) over a temperature range 10--295 K. The optical conductivity $\ensuremath{\sigma}(\ensuremath{\omega})$ shows incoherent-to-coherent crossover with…
The fracture behavior of an oxide/oxide ceramic‐matrix composite, alumina/alumina‐silica (Nextel610/AS), was investigated at 23° and 950°C using a single edge notched specimen geometry with clamped ends. Crack growth and damage progression were monitored during the tests using optical microscopy, ultrasonic C‐scans, a…
Stable organic biradical crystals PNNNO, ${\mathrm{F}}_{2}\mathrm{PNNNO},$ and PIMNO of the PNNNO family were synthesized. ${\mathrm{PNNNO}=2\ensuremath{-}[{4}^{\ensuremath{'}}\ensuremath{-}$ $(N\ensuremath{-}\mathit{tert}\ensuremath{-}\mathrm{butyl}\ensuremath{-}N\ensuremath{-}\mathrm{oxyamino})\mathrm{phenyl}]\ensur…
Amorphous materials in the system , with or without the addition of , were synthesized by mechanical milling treatment of starting oxides in a dry atmosphere at room temperature. These materials, obtained as fine powders, worked as an anode for a lithium‐ion secondary battery using a conventional liquid electrolyte. T…
Raman spectra were measured for the full range of hole doping of the orthomanganites of the form ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ $(0<~x<~1)$ from ambient temperature to 75 K. Two high-frequency phonons that we assign to stretching modes of the oxygen atoms in the ${\mathrm{M…
The scanning reference electrode technique (SRET) has been used to study the influence of a range of anodic and cathodic corrosion inhibitors on patterns of localized corrosion occurring on the intact zinc surface of galvanized sheet steel. SRET spatially can resolve localized anodic and cathodic activity occurring ac…
The photocurrent measurements in combination with a modulation of the depletion region is a method which has the potentiality to determine the diffusion length profile in semiconductors directly. In this article the method is applied to strongly compensated (Au-doped) silicon. The expressions for signal description ar…
The highly branched ester rac-1 has been prepared. It exists in the form of a conglomerate (m.p. 90–92 °C) in which the two enantiomers are present in separate crystal lattices, as indicated by the melting point diagram. Both enantiomers of 1 have been isolated by crystallization [m.p. 112–114 °C, [α]D22 = +24.4 ± 0.7…
The paper presents the results of a study of kinetics of the recombination processes in crystals LiB3O5 (LBO) obtained by the use of time-resolved luminescence and optical absorption spectroscopy. It was revealed that the observed peculiarities of the recombination processes in LBO are due to a participation of the tr…
Highly oriented strontium barium niobate (SBN) thin films have been grown on MgO {100}substrates by pulsed laser deposition. The films have been characterised by X-ray diffraction (XRD), scanning electron microscopy and atomic force microscopy. XRD theta - 2 theta scans indicate that the single phase crystalline SBN l…