Materials Literature
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The flow properties of suspensions of weakly attractive particles are investigated as a function of volume fraction and strength of interparticle attraction. The suspensions are composed of uniform silica spheres with covalently bound octadecyl chains with diameters 100–125 nm suspended in decalin and tetradecane. At…
The adaptive finite-element method proposed in our previous work [Phys. Rev. B 54 (1996) 7602] is extended to fully self-consistent calculations of realistic materials. Our method is highly adaptive, sparse, parallel, and suited for the O(N) methods, thanks to the localized finite-element basis functions. Accurate ion…
Ammonium is an important nitrogen source for many microorganisms and plants. Ammonium transporters whose activity can be probed with [14C]methylammonium have been described in several organisms including some cyanobacteria, and amt genes encoding ammonium/methylammonium permeases have been recently identified in yeast…
We have used Brillouin light scattering (BLS) to measure the room-temperature, high-frequency mechanical properties of thin freely standing polystyrene (PS) films. We have investigated the effects of chain confinement and the free surface on the mechanical properties by measuring the velocity of film-guided acoustic p…
A finite element formulation using an elastoplastic polycrystal constitutive theory is presented. The crystal constitutive equations are expressed in an intermediate configuration obtained by unloading the deformed crystal without rotation from the current configuration to a stress-free state through small elastic str…
We present an improved quantitative mobility spectrum analysis (i-QMSA) procedure for determining free electron and hole densities and mobilities from magnetic-field-dependent Hall and resistivity measurements on bulk or layered semiconductor samples. The i-QMSA technique is based on a fundamentally new approach, whic…
Kinetic analyses for the solid‐state reactions of reactant particles in an assemblage with a particle‐size distribution (PSD) have been reexamined for the reactions that proceed by the advance of the reaction interfaces inward toward the center of the individual reactant particles. The experimental kinetic curves for…
At embryo implantation, it is postulated that the initial contact between blastocyst and maternal tissues is by adhesion of the trophoblast to the uterine epithelium. This cell-to-cell interaction is thought to be critical for implantation, although the actual adhesive forces have never been determined. In the present…
The unique structure and reactivity of cellulose opens up various possibilities for the design of advanced materials based on this biomacromolecule. In the present feature the state of the art of selected cellulose functionalization reactions is discussed adequately considering own research results. In particular, new…
Available data suggest that drugs should be delivered to a vascular lesion at a high concentration over an extended period of time to control vascular smooth muscle cell (VSMC) proliferation. This study was undertaken to formulate a paclitaxel, an antimicrotubule agent, into a biodegradable poly (ethylene oxide)-poly(…
Experimental results for a carbonated, high-CaO evolved nephelinite at 0.2 and 0.5 GPa at 900–1040°C are presented. Immiscible carbonate and silicate liquids are in equilibrium with a variety of crystal phases (clinopyroxene, nepheline, melilite, wollastonite, perovskite, melanite garnet, titanite, Fe-rich spinel, apa…
The deformations of a face-centered cubic polycrystal are simulated under idealized (plane strain compression) rolling conditions. A polycrystal is constructed using 1099 rhombic dodecahedron shaped crystals, each discretized with 48 tetrahedra elements. The rhombic dodecahedron is a 12-sided, space-filling polyhedron…
The ruthenium-substituted “sandwich” type polyoxometalate [WZnRu III 2 (XW 9 O 34 ) 2 ] 11 - where X = Zn II or Co II has been shown to be unique in its ability to catalyze the selective hydroxylation of adamantane at the tertiary carbon position with molecular oxygen as the oxygen donor. The hydroxylation features an…
The use of deuteration in concert with uniform 15 N, 13 C-labeling has been critical for the chemical shift assignment of several proteins and protein complexes over 30 kDa. Unfortunately, deuteration reduces the number of interproton distance restraints available for structure determination, compromising the precisio…
(001)-oriented heterostructures consisting of LaAlO3 substrates, SrRuO3 bottom electrodes, and Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN-PT) (70/30) films were deposited by pulsed laser deposition from Pb-enriched ceramic targets. The epitaxial growth of all layers was confirmed by four-circle x-ray diffraction. Film growth was ca…
In this article we report experimental results on the deformation and the critical breakup conditions of a single drop in a medium under simple shear flow. The role played by both drop and matrix elasticities is quantified by using constant viscosity elastic (Boger) fluids. The experiments were conducted using two tra…
The “3 + 1” route for porphyrinoid synthesis is an excellent methodology for preparing aromatic porphyrin analogues with six-membered ring subunits. Condensation of 5-formylsalicylaldehyde with tripyrranes 15, 24, and 25 in the presence of 5% TFA-dichloromethane, followed by neutralization and oxidation with DDQ, affo…
Spin fluctuation-induced superconductivity in two-dimensional organic compounds such as \kappa-(ET)_2-X is investigated by using a simplified dimer Hubbard model with right-angled isosceles triangular lattice (transfer matrices -\tau, -\tau^\prime). The dynamical susceptiblity and the self-energy are calculated self-c…
An in-situ hot pressing/solid-liquid reaction process was developed for the synthesis of dense polycrystalline Ti3SiC2 ceramics using Ti, Si, and graphite powders as starting materials. The present work demonstrated that this process was one of the most effective and simple methods for the preparation of dense bulk Ti…
The mechanism of luminance decrease in blue emitting phosphor after annealing has been studied. It was shown experimentally that annealing in air oxidizes and substantially changes the ion to an ion. This is also deactivates the luminescent center, thus decreasing emission. Furthermore, the compound , in which the val…