Materials Literature
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Abstract We carried out the polyaddition of dye‐embedded diols with diisocyanates to obtain novel nonlinear optical (NLO) polyurethanes, where the NLO units were embedded in the polymer backbone. The obtained polymers showed high glass‐transition temperatures (138–184 °C) and thermal stability (temperature of 10% weig…
Halide lattices singly doped with ${\mathrm{Os}}^{4+}$ or ${\mathrm{Er}}^{3+}$ are both known to show visible upconversion luminescence upon excitation around 10 000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$. In this study, we analyze the cooperative processes in ${\mathrm{Cs}}_{2}{\mathrm{NaYCl}}_{6}$ codoped with $…
Electron absorption, excitation and emission as well as electron spin-resonance spectra were measured for orthorhombic (K, Rb, Cs) and monoclinic (Li, Na) M I Cr x In 1- x (MoO 4 ) 2 ( x = 0.5-2%, M I = Li, Na, K, Rb, Cs) in the temperature range 5-300 K. The local structure of the Cr 3+ ions is discussed on the basis…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTRedirection of Oxidation Reactions by a Polyoxomolybdate: Oxydehydrogenation Instead of Oxygenation of Alkanes with tert-Butylhydroperoxide in Acetic AcidAlexander M. Khenkin and Ronny NeumannView Author Information Department of Organic Chemistry Weizmann Institute of…
The low temperature TL spectra of undoped alkaline earth fluorides consistently show a continuous broad band emission around 280-300 nm. The origin of this emission is related to the relaxation of the self-trapped exciton (STE) in the form of an F-H pair. In doped samples, the broad emission is quenched in favour of e…
An iterative, computer-assisted, drug design strategy that combines molecular design, molecular mechanics, molecular dynamics (MD), and free energy perturbation (FEP) calculations with compound synthesis, biochemical testing of inhibitors, and crystallographic structure determination of protein-inhibitor complexes was…
Peritoneal carcinomatosis is a late stage in cancer progress, for which no effective therapeutic modality exists. Targeting therapeutic agents to disseminated lesions may be a promising modality for treating peritoneal carcinomatosis. Gadolinium ((157,155)Gd) is known to generate Auger and internal conversion electron…
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A novel synthetic route for the preparation of a phosphorylcholine terminated thiol is presented. The new molecule was characterized by FTIR and NMR and was used to prepare one- and two-component monolayers rich in phosphorylcholine. The new surfaces had an intermediate hydrophilicity based on their sessile contact an…
We report the successful fabrication of single-filament composite MgB2/SUS ribbons, as an ultra-robust conductor type, employing the powder-in-tube (PIT) process, by swaging and cold rolling only. The remarkable transport critical current (Ic) of the non-sintered MgB2/SUS ribbon has observed, as an unexpected result.…
We present a detailed study of different exchange-correlation (xc) functionals in describing the dynamical properties of finite systems. For that purpose, we calculated the static polarizabilities, ionization potentials and optical absorption spectrum of four small clusters, Na_2, Na_4, SiH_4 and Si_2H_6, using a real…
We present a novel technique for enhancing Fermi surface (FS) signatures in the 2D distribution obtained after the 3D momentum density in a crystal is projected along a specific direction in momentum space. These results are useful for investigating fermiology via high resolution Compton scattering and positron annihi…
We have examined two-dimensional diffraction features of novel nanosheet crystallites of quasi-TiO 2 . A single crystallite gave a face-centered orthogonal array of hl diffraction spots representing a 0.38 nm × 0.30 nm periodicity, which reflects the two-dimensional atomic arrangement in the nanosheet. Diffraction col…
Ultrasonication of single-wall carbon nanotubes (SWNTs) in a monochlorobenzene (MCB) solution of poly(methyl methacrylate) (PMMA) enabled us to react SWNTs with MCB or PMMA chemically. After the SWNTs reacted with these organic materials, they turned into ragged SWNTs (r-SWNTs) with many defects in the sidewall when b…
Recent work on magnetic properties of transition-metal nanowire arrays produced by electro-deposition is reviewed. The wires, which are electro-deposited into self-assembled porous anodic alumina, form nearly hexagonal arrays characterized by wire diameters down to less than 10 nm, wire lengths up to about 1 µm, and v…
Abstract Mechanical, thermal, and morphological properties of blends of high density polyethylene and poly(ethylene‐ co ‐1‐octene) (PEO) were evaluated. The blends were prepared in a single screw extruder at 230°C and 50 rpm with volume fraction of elastomer varying in the range from 0.05 to 0.8. Factors such as chemi…
We investigated the sequential generation characteristics of partial discharge (PD) pulses in SF 6 gas under the application of a positive dc voltage, in order to discuss the PD mechanism based on space charge behaviour and corona stabilization effect. Highly time-resolved measurement of PD current pulses enabled us t…
Abstract The pressure‐volume‐temperature and thermal properties of dendrimers based on benzyl ether were measured and compared with literature values for monodisperse, linear polystyrenes. In addition, property measurements are presented for an exact linear analogue to the fifth‐generation dendrimer. The thermodynamic…
Abstract Elements of the technology of nylon fibers and nylon plastics are reviewed. These include the development of equations to quantify the effects of end‐group imbalance and chain‐ending impurities, the kinetics of the polymerization of caprolactam, the solid‐state polymerization of nylon‐66, and the dependence o…
A finite element model of the Sikorsky Advanced Composite Airframe Program (ACAP) helicopter was developed using the non-linear, explicit transient dynamic code, MSC.Dytran. Analytical predictions were correlated with experimental data obtained from a full-scale crash test of the Sikorsky ACAP helicopter flight test a…