Polycondensation of Aminosilanes in Methanol
S.828-839
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Energy spectra and level statistics of Fibonacci and Thue-Morse chains
We study the density of states, the distribution of energy spacings, and the transmission coefficient of one-dimensional quasiperiodic Fibonacci and Thue-Morse systems. We consider arrays of \ensuremath{\delta} potentials with constant separation and two potential strengths, and tight-binding systems with constant nea…
Molecular structure of liquid‐crystalline copolyesters of vanillic acid, 4‐hydroxybenzoic acid and poly(ethylene terephthalate)
Abstract Thermotropic liquid‐crystalline copolyesters made from vanillic acid (V), 4‐hydroxybenzoic acid (B) and poly(ethylene terephthalate) (E) were examined by 1 H‐NMR and GPC investigations. Nine possible diads could be identified and assigned. The sequence distribution of V/B/E copolyesters tends to change from r…
Magnetic field analysis by finite element method using effective anisotropic field
This paper presents a new expression of the two dimensional magnetic properties using the effective anisotropic field. We give a definition of the effective anisotropic field under alternating flux condition and apply it to measured results. The method allows one to obtain a simple model even for grain-oriented steel.…
Studies on the interaction of selenite and selenium with sulfur donors. Part 3. Sulfite
Elemental selenium dissolves in sulfite solution to form selenosulfate ion: Se + SO 3 2− = SeSO 3 2− .The formation constants for this equilibrium at temperatures from 0 to 35 °C are reported for the first time. The isomeric thioselenate anion, SSeO 3 2− , is not, however, produced by the reaction of sulfur with selen…
Exchange Interactions in the Bimetallic Chain Compound Cu(ethylenediamine)2MnCl4
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange Interactions in the Bimetallic Chain Compound Cu(ethylenediamine)2MnCl4B. Chiari, A. Cinti, O. Piovesana, and P. F. ZanazziCite this: Inorg. Chem. 1995, 34, 10, 2652–2657Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inis…
Alkali feldspars as a main phosphorus reservoirs in rare‐metal granites: three examples from the Bohemian Massif (Czech Republic)
ABSTRACT Phosphorus‐rich alkali feldspars were found in three peraluminous highly differentiated albite‐topaz‐Li‐mica granites in the W and S parts of the Bohemian Massif. The average contents of P 2 O 5 in K‐feldspars (Křížovy kámen 0.57 wt%, Homolka 0.77 wt%, and Podlesí 0.83 wt%) are higher than the average content…
Convergent real-space cluster expansion for configurational disorder in ionic systems
We present a rapidly converging, real-space expansion to compute the electrostatic energy of point-charge configurations on a fixed lattice. The rapid convergence is obtained by requiring that the expansion only reproduce well the configurations with energies below some cutoff energy. The convergence rate can be syste…
Comparison of Surface‐Enhanced Raman and Hyper‐Raman Spectra of the Triphenylmethane Dyes Crystal Violet and Malachite Green
Abstract Vibrational spectra of two dyes, malachite green and crystal violet are presented. Raman and hyper‐Raman spectra are recorded as surface‐enhanced (hyper‐) Raman spectra on silver colloids. These data are compared to the respective IR spectra with respect to the point group of the molecules (C 2 and C 3 ). The…
Effect of Fictive Temperature on Dynamic Fatigue Behavior of Silica and Soda‐Lime Glasses
The dynamic fatigue characteristics of silica glasses with fictive temperatures of 1000°, 1100°, and 1300°C and soda‐lime glasses with fictive temperatures of 470° and 530°C were measured in air. For both glasses, samples with higher fictive temperatures had a greater fatigue resistance. Inert strength of silica glass…
Macroscopic theory for the flow behavior of smectic-Cand smectic-C*liquid crystals
Equations governing the flow behavior of Sm-C and Sm-${\mathit{C}}^{\mathrm{*}}$ liquid crystals are derived. It is shown that the general theory for the description of the macroscopic flow properties of the system demands 20 viscosity coefficients. Using thermodynamic arguments, one can show that these coefficients m…
Dielectric Spectroscopy on Dilute Blends of Polyisoprene/Polybutadiene: Effects of Matrix Polybutadiene on the Dynamics of Probe Polyisoprene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric Spectroscopy on Dilute Blends of Polyisoprene/Polybutadiene: Effects of Matrix Polybutadiene on the Dynamics of Probe PolyisopreneKeiichiro Adachi, Takao Wada, Tatsuyoshi Kawamoto, and Tadao KotakaCite this: Macromolecules 1995, 28, 10, 3588–3596Publication Date (…
Fractal Analysis of Commercial and Pyrolytic Carbon Blacks Using Nitrogen Adsorption Data
Abstract The surface fractal dimension of commercial rubber-grade carbon blacks and of pyrolytic carbon blacks ( CB p ) was determined using nitrogen sorption data. The CB p were produced by vacuum pyrolysis of used tires at different temperatures and pressures. Commercial carbon blacks and CB p obtained at low pyroly…
A Ca2+-binding Chimera of Human Lysozyme and Bovine α-Lactalbumin That Can Form a Molten Globule
In contrast to lysozymes, which undergo two-state thermal denaturation, the Ca(2+)-free form of the homologous alpha-lactalbumins forms an intermediate "molten globule" state. To understand this difference, we have produced a chimera of human lysozyme and bovine alpha-lactalbumin. In the synthetic gene of the former t…
Characterization of the 23S and 5S rRNA genes of Coxiella burnetii and identification of an intervening sequence within the 23S rRNA gene
Characterization of the rRNA operon from the obligate intracellular bacterium Coxiella burnetii has determined the order of the rRNA genes to be 16S-23S-5S. A 444-bp intervening sequence (IVS) was identified to interrupt the 23S rRNA gene beginning at position 1176. The IVS is predicted to form a stem-loop structure f…
A LIGHT MICROSCOPICAL INVESTIGATION AND MULTIVARIATE STATISTICAL ANALYSES OF HETEROVALVAR CELLS OFCYCLOTELLA-SPECIES (BACILLARIOPHYCEAE) FROM LAKES OF THE BERLIN-BRANDENBURG REGION
113 randomly selected frustules of Cyclotella taxa, taken from the plankton of four lakes, have been investigated with respect to variation between the two thecae of each frustule and also variation within and between populations occurring in the different lakes. Multivariate statistical analyses of phenetic similarit…
Isolation of Schizosaccharomyces pombe Isopentenyl Diphosphate Isomerase cDNA Clones by Complementation and Synthesis of the Enzyme in Escherichia coli
Isopentenyl diphosphate (IPP) isomerase catalyzes an essential activation step in the isoprene biosynthetic pathway. The Saccharomyces cerevisiae gene for IPP isomerase, IDI1, was recently isolated and characterized (Anderson, M. S., Muehlbacher, M., Street, I. P., Proffitt, J., and Poulter, C. D. (1989) J. Biol. Chem…
On the Modification of Chitosan Through Grafting
The feasibility of grafting poly(methyl acrylate) and poly[1-(methoxycarbonyl) ethylene] onto chitosan, poly-β(1←-4)-2-amino-2-deoxy-d-glucose, was investigated. The grafting reaction was carried out in aqueous solution by using ferrous ammonium sulfate (FAS) in combination with H2O2 as redox initiator. The effects of…
Bulk Photovoltaic Effect in Reduced/Oxidized Lead Lanthanum Titanate Zirconate Ceramics
The dependence of the bulk photovoltaic effect (BPE) on illumination intensity and wavelength has been studied in (Pb 0.97 , La 0.03 )(Zr 0.52 , Ti 0.48 ) 1-0.03/4 O 3 ceramics normally sintered at 1200° C for 2 h and then heat-treated in various atmospheres such as nitrogen, air and oxygen at 900° C for 1 h to invest…
A theoretical model of solvation in continuum anisotropic dielectrics
A new formulation of the polarizable continuum method (PCM) is presented to describe the electrostatic interaction between molecular solutes and anisotropic media (e.g., liquid crystals, crystalline matrices). The main features of the PCM (ab initio treatment of solute, cavity of arbitrary shape, dielectric reaction d…