Materials Literature
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A hitherto unknown class of dyestuff compounds exhibiting three key characteristics, namely absorption in the near infrared (NIR) region, high photostability and good processability, is described.
Acrylic resins have been used in many different applications in dentistry, especially in the fabrication of provisional fixed partial dentures. Ideally, a provisional crown and bridge material should be easy to handle and should protect teeth against physical, chemical, and thermal injuries. Some of the problems assoc…
A series of eighteen new ‘push–pull’ molecules obtained by self-assembly of salicylideniminophenols and various phenylboronic acids is reported. Electric field-induced second-harmonic measurements of the nonlinear optical response reveal that the nature of the phenylboron moieties has a modest influence on the molecul…
Two composite systems, “Ag” and “Ag–S” nanoparticles in silica films, were approached by using two different synthesis routes, namely sol–gel and ion implantation. Silica composites containing embedded nanosized silver- and silver sulfide-crystallites were obtained by the sol–gel process. The formation of silver nanog…
We report a novel method for the preparation of well-defined metallic nanoparticles, which is illustrated with the technologically important example of palladium nanoparticles dispersed in gamma-alumina.
Transmission electron microscopy (TEM) was used to examine Zircaloy fuel ladding, either discharged from several PWRs and a BWR after irradiation to fluence levels of 3.3 to 8.6 × 1021 n cm-2 (E > 1 MeV) or hydrogen-charged and heat-treated under stress to produce radial hydrides; the goal was to determine the…
Self-diffusion along dislocations in ultra high purity iron containing 0.5–1.2 mass ppm carbon, 0.1–1.0 mass ppm nitrogen and 1.8–4.0 mass ppm oxygen has been studied by the radioactive tracer method with the sputter-microsectioning technique. Below 700 K, the self-diffusion coefficient along dislocations has been det…
Using the Mitsunobu reaction as a key step, a general and efficient method for the synthesis of EDOT monomers has been developed. Novel substituted EDOTs and the first chiral derivatives were generated in high yields.
Abstract We describe various molecular switching processes occurring in several types of inorganic solids: spin cross-over (SC) compounds, photomagnetic Prussian blue analogs (PBAs), and valence-tautomeric system. Their thermo-, photo-, piezo-, and magneto-chromic properties are illustrated by recent examples. A commo…
The synthesis of a verdazyl radical with a carboxylate substituent renders the radical highly soluble in water, thereby permitting the aqueous synthesis of Ni(II) and Co(II) verdazyl complexes which have been structurally and magnetically characterized.
Abstract The influence of the dominance of different processes on the microstructural development of a quartzite was investigated using the numerical model ‘ELLE’. Dynamic recrystallization of a polycrystalline aggregate was simulated by the concurrent operation of viscous deformation, lattice rotation, subgrain forma…
Block copolymers create various types of nano-structures, e. g., spheres, rods, cubes, and lamellae. This review discloses the dynamic macromolecular organization of block copolymers comprising poly(L-lactide) (PLLA) and poly(oxyethylene) (PEG) that allows to simulate elaborate biological systems. The block copolymers…
Incorporation of alkaline-earth cations into the zircon-type lattice of Ce1 − xAxVO4 (A = Ca, Sr; x = 0–0.2) leads to higher p-type electronic conductivity, while the tetragonal unit cell volume and Seebeck coefficient decrease due to increasing concentration of electron holes localised on cerium cations. The oxygen i…
The study investigating the electrical properties of dense lead-free piezoelectric ceramics in the (1 − x)Sr2NaNb5O15–xCa2NaNb5O15 (SCNN) system with x ranging from 0.05 to 0.35 is reported here. X-Ray diffraction patterns all showed a single tetragonal tungsten bronze phase, peak broadening being seen on increasing t…
The main operational parameters controlling borehole stability in drilling shales with environmentally acceptable water-based drilling fluids are the density and the chemical composition of the fluid. An electro-chemo-poro-elastic model for saturated shale is presented, which describes the interaction between the dril…
OBJECTIVE: The purpose of our study was to assess the safety and dialysability of gadobutrol, a new, electrically neutral, and highly concentrated MR contrast agent, in patients who require hemodialysis. SUBJECTS AND METHODS: Eleven patients with end-stage renal failure who required ongoing hemodialysis were enrolled…
The dimercaptan 2,5-dimercapto-1,3,4-thiadiazole (DMcT) has been employed as a component in secondary lithium battery cathodes. However, spectroscopic studies of its behavior have been impeded by general uncertainty regarding its vibrational band character. The purpose of this study is to provide a spectroscopic basis…
The structural changes and magnetic anomalies accompanying martensitic transformations in Ni–Mn–Ga alloys are briefly discussed. The role of lattice tetragonality of martensite in the reduction of magnetic field needed for the observation of large magnetostrain effect is theoretically analyzed, considering the compens…
Abstract A hyperbranched polycarbosilane of the type [R 3 SiCH 2 −] x [−SiR 2 CH 2 −] y [−SiR(CH 2 −) 1.5 ] z [−Si(CH 2 −) 2 ] l (R = H, –CH 2 CH=CH 2 , or OR) has been prepared, which was used as a source of inorganic/organic hybrid materials and, through pyrolysis, as a precursor to inorganic solids with unusual mic…
We present a method that alleviates some of the sensitivity to the inclusion of diffuse basis functions when calculating partial atomic charges from a Löwdin population analysis. This new method locally redistributes that part of the Löwdin population that comes from diffuse basis functions so that the final charges c…