Materials Literature
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Polykristallines In2(WO4)3 wurde elektrochemisch charakterisiert und eindeutig als ein In3+ leitender Festkörperelektrolyt identifiziert. Bei Temperaturen um 250 °C–260 °C erfährt Indiumwolframat einen Phasenwechsel mit dem Übergang von einer monoklinen in eine orthorhombische Kristallstruktur. Die in der Hochtemperat…
A remarkable increase of the silver conductivity in glassy ${\mathrm{AgPO}}_{3}$ by four orders of magnitude is known to occur on adding ${\mathrm{PbI}}_{2}.$ We have investigated the structural changes that occur on ${\mathrm{PbI}}_{2}$ doping in $({\mathrm{PbI}}_{2}{)}_{0.1}{\ensuremath{-}(\mathrm{A}\mathrm{g}\mathr…
The sorption of metal ions [Cd(II), Cu(II), Co(II), Pb(II), Zn(II), Cr(III), V(IV), V(V)] from aqueous solution by Whatman cellulose ion exchangers was investigated as a function of pH. Whatman P-11 (ammonium cellulose phosphate) exhibited better performance than a fibrous anion exchanger (Whatman Cellect-Ion Exchange…
Surface modification of argon plasma-pretreated poly(tetrafluoroethylene) (PTFE) film by UV-induced graft copolymerization with 4-vinylaniline (4-VAn), followed by oxidative copolymerization of the aniline moiety of the grafted 4-VAn polymer with aniline, was carried out to render the PTFE surface conductive. The surf…
Using Monte Carlo simulation methods, we explore the role of molecular shape in the phase behavior of liquid crystals and the electroclinic effect. We study a "bent-rod" mesogen shaped like the letter Z, composed of seven soft spheres bonded rigidly together with no intramolecular degrees of freedom. For strongly angl…
Abstract This paper presents a new correction procedure for quantitative x‐ray microanalysis in the environmental or variable pressure scanning electron microscope (SEM). This method is based on a plot of the measured intensity as a function of the fraction of nonscattered beam intensity, f p . The theory predicts tha…
Deuteron NMR (DNMR) measurements were performed with high-temperature and spectral resolution on the octylcyanobiphenyl (8CB) liquid crystal confined to the randomly interconnected pores of silica aerogel as a function of temperature and silica density. The aerogel density was varied by one order of magnitude and the…
A device for wrinkle recovery measurements involves the installation of a laser sensor. The shapes of fabric wrinkles are described by magnitude and sharpness using power spectra obtained from two-dimensional fast Fourier transformation and the distribution of fabric surface angles obtained from spline interpolation a…
29 Si magic‐angle spinning nuclear magnetic resonance (MASNMR) was used to study the room‐temperature hydration of C 3 S, ß‐C 2 S, and reactive ß‐C 2 S mixed with different amounts of silica fume (SF) that had been hydrated up to nine months and longer. The overall CaO:SiO 2 molar ratios of the mixes were 0.12, 0.20,…
The compatibilizing effect of a random copolymer, which is the transesterification product, on its corresponding blend system of bisphenol-A polycarbonate/poly(ethylene terephthalate) (PC/PET) has been studied using a Differential Scanning Calorimeter and a Phase Contrast Microscope. It was found that after a long tim…
The rotational temperature of a low energy (0.09 eV), C2 Swan band state (a 3Πu), obtained by white light absorption, is compared to the rotational temperatures of three electronic excited states [C2(d 3Πg),CH(A2Δ) and CN(B 2Σ+)] in a high power, H2/CH4 microwave plasma used for diamond deposition. All temperatures ar…
The graft copolymerization of maleic anhydride (MAH) onto a acryloni-trile-butadiene-styrene (ABS) terpolymer was carried out using benzoyl peroxide (BPO) as an initiator and toluene as a solvent. The effects of various parameters such as monomer concentration, initiator concentration, reaction time, and temperature o…
OBJECTIVE: To support the clinical use of gadobenate dimeglumine for injection as an intravascular magnetic resonance imaging contrast medium through an extensive battery of toxicological safety studies. METHODS: Single and multiple dose toxicity, reproduction and mutagenicity assessments were carried out in rodents a…
A tetranuclear mixed-spin nickel(II) complex featuring two urea molecules in an unprecedented μ3-ĸN:ĸN′:ĸO coordination mode has been structurally characterized. The two central high-spin nickel(II) ions exhibit ferromagnetic coupling (J = +3.4 cm−1) mediated by the NH2–C–O linkages of the bridging urea. In solution t…
We study the anchoring mechanism due to substrate-adsorbed ions by examining a related anchoring transition. An analytical solution to the Poisson equation shows that, as their number suffices for a non-negligible anchoring contribution, the surface field is screened over some characteristic microscopic distance. It i…
The dynamic magnetization reversal behavior of polycrystalline ${\mathrm{Ni}}_{80}{\mathrm{Fe}}_{20}$ films (thickness 60 and 200 \AA{}) was studied in the temperature range 90--300 K by applying a magnetic field along the easy magnetization axis of the samples. The loop area A is found to follow the scaling relation…
The synthesis and characterization of novel fluorine-containing PMR polyimides derived from the diethyl ester of 4,4‘-(2,2,2-trifluoro-1-phenylethylidene)diphthalic acid, p -phenylenediamine, and the monoethyl ester of cis -5-norbornene- endo -2,3-dicarboxylic acid in low boiling solvents were described. The fluoropol…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTIntramolecular Energy Transfer in 1,3,5-Phenylene-Based Dendritic PorphyrinsMutsumi Kimura, Tetsuo Shiba, Tsuyoshi Muto, Kenji Hanabusa, and Hirofusa ShiraiView Author Information Department of Functional Polymer Science, Faculty of…
Cross-correlation techniques have been used successfully to suppress multiple scattering in dynamic light-scattering experiments on turbid samples. This allows dynamic information to be obtained straightforwardly by processing the remaining single scattering. Here we show that cross-correlation techniques can also be…
We present a self-consistent method for deriving moment equations for kinetic models of polymer dynamics. The Doi model [J. Polym. Sci., Polym. Phys. Ed. 19, 229 (1981)] of liquid-crystalline polymers with the Onsager excluded-volume potential is considered as an example. To lowest order, this method amounts to a simp…