Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
High concentrations of 226Ra (865-2,383 Bq kg(1)) were measured in the coal-slags, originated from the region of the settlement Tatabánya, Transdanubian Middle Mountains, Hungary. These slags are commonly used as building materials in this district. The external gamma dose rate was measured in 188 rooms at different h…
The strength degradation of alumina/alumina:calcium‐hexaluminate/alumina trilayers, after damage from Hertzian contacts, is evaluated. Relative to the monolithic alumina and alumina:calcium‐hexaluminate constituent layer materials, the trilayers show markedly improved strength retention in the damaged state at high co…
We have used small-angle scattering to study the calcium dependence of the interactions between calmodulin (CaM) and skeletal muscle myosin light chain kinase (MLCK), as well as the conformations of the complexes that form. Scattering data were measured from equimolar mixtures of a functional MLCK and CaM or a mutated…
Thin, homogeneous films of a high electron affinity (n-dopable) polymer, poly(3,4-dicyanothiophene) (PDCTh), were prepared by in-situ thermal polymerization of 2,5-diiodo-3,4-dicyanothiophene on substrates. As a result of the presence of two cyano substituents on the thiophene backbone, PDCTh is an electronegative pol…
The bidentate dithiolate ligands N,N-diethyl-2,3-dimercaptobenzamide (H(2)-1), bis(N,N-diethyl-2,3-dimercaptoterephthalamide (H(2)-2), and 1,4-bis(hydroxymethyl)-2,3-dimercaptobenzene (H(4)-3) were synthesized from 2,3-dimercaptobenzoic acid or 2,3-dimercaptoterephthalic acid. The air-sensitive ligands form metallocen…
In this article, an all-electron first-principles total energy calculation with Gaussian-type functions for the wave functions, for the exchange correlation potential, and for the charge density has been applied for single chains of polyparaphenylene (PPP). A local-density approximation within a helical band structure…
A model graft copolymer in which position of graft points was set to the center of a backbone molecule was prepared via anionic living polymerization. Polystyrene-block-poly(p-tert-butoxystyrene)-block-polystyrene (PSt-b-PBSt-b-PSt) was prepared by three-stage sequential addition. The tert-butyl group was removed from…
The correlation between paramagnetic defects and the electron emission in diamond films, which were deposited by the chemical vapor deposition method, has been studied using electron-spin-resonance (ESR) and field-emission measurements. The paramagnetic defects, which are a carbon dangling bond in the diamond layer (P…
Radiation effects on the formation of conjugated double bonds in the thermal degradation of poly(vinyl chloride) (PVC) and poly(vinyl alcohol) (PVA) were investigated. Thin films of PVC and PVA were either irradiated with γ-rays at ambient temperature (pre-irradiation) and then subjected to thermal treatment, or irrad…
A new versatile method for the preparation of thin polymer coatings is presented. It is based on the adsorption of reactive polyelectrolytes by electrostatic interactions. In a following activation step, the adsorbed polymers are modified by reacting with low molar mass reagents carrying the complementary charge, in o…
The kinetics of adsorption and surface structure of adsorbed layers of the human fibrinogen on the gold surface, determined by Surface Plasmon Resonance (SPR) and Atomic Force Microscopy (AFM) analysis, was employed to probe the lateral distribution and preferred orientation of protein molecules within the monolayer.…
Density functional theory is used to investigate the electronic and geometric structures and periodic trends in metal-metal bonding of d(1)d(1) and d(2)d(2) face-shared M(2)X(9)(3)(-) dimers of Ti, Zr, Hf (d(1)d(1)) and V, Nb, Ta (d(2)d(2)). For these systems three distinct coupling modes can be recognized, depending…
Abstract A novel scheme for simulating the selective catalytic reduction of NO with NH 3 on a honeycomb‐type catalyst was developed based on a 3‐D model. New insight was gained by considering such modeling aspects as: correct geometry (square ducts); hydrodynamic entrance effects; occurrence of adsorption phenomena an…
In this paper, the consistency of kilovoltage (tube potentials between 40 and 300 kV) x-ray beam dosimetry using the "in-air" method and the in-phantom measurement has been studied. The procedures for the measurement of the central-axis depth-dose curve, which serve as a link between the dose at the reference depth to…
A theoretical model for the metal hydride electrode has been developed assuming that hydrogen diffusion in the alloy and charge‐transfer at the surface control the discharge process. Theoretical equations for the dependence of equilibrium potential and exchange current density on the surface hydrogen concentration hav…
Synopsis The penetration of chemical reagents through human hair after bleaching has been spatially characterized using infrared microspectroscopy (IMS) with a synchrotron source. Chemical imaging of hair cross sections before and after bleaching was achieved with high contrast, using the peptide and lipid mid‐infrare…
An oxalic acid-based system for chemically retting flax is tested and compared with enzymatic retting. The retting effect is substantially higher at pH 10 and 11 than at lower pH levels, and the optimal oxalic acid concentration is 50 mmol. The presence of the strong detergent sodium dodecyl sulfate (SDS) further enha…
We report a study of the specific heat, resistivity, and magnetization of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{x}$ for $x=0.47,$ 0.5, 0.53 with and without an applied magnetic field. In zero (earth) field we find that the charge-ordered materials $(x=0.5,0.53)$ have extra entropy of nonmag…
Other| December 01, 1998 Complete substitution of Si for Ti in titanite Ca(Ti (sub 1-x) Si x ) vi Si iv O 5 R. Knoche; R. Knoche Universitaet Bayreuth, Bayerisches Geoinstitut, Bayreuth, Federal Republic of Germany Search for other works by this author on: GSW Google Scholar Ross J. Angel; Ross J. Angel Search for oth…
We present the concept and recent developments of spin-polarized low energy electron microscopy. A detailed discussion addresses the questions of magnetic resolution and the image acquisition rate. Examples of recent experiments illustrating the possibilities of the present instrumental setup are given.