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。
At the wall in a hybrid cell with strong anchoring, the nematic director is parallel to one wall and perpendicular to the other. Usually, the free energy is minimized by a configuration where the director orientation changes continuously with position across the cell. The boundary conditions can also be satisfied, how…
The kinetics of monoatomic steps in diffusion-controlled crystal growth and evaporation processes are investigated analytically using a Green's function approach. Integro-differential equations of motion for the steps are derived; a systematic linear stability analysis is carried out treating simultaneously perturbati…
Dielectric properties of lead magnesium niobate (PMN) and Ta-bearing strontium barium niobate (SBNT) were measured as a function of temperature, and the crystal structure of PMN was refined by the Rietveld analysis method. The results of structure refinement indicate that the volume of polar microregions (PMR) increas…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization of .epsilon.-Caprolactone by Divalent Samarium ComplexesWilliam J. Evans and Hideo KatsumataCite this: Macromolecules 1994, 27, 8, 2330–2332Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 April 1994https:…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Modeling of Polycarbonate. 1. Force Field, Static Structure, and Mechanical PropertiesCun Feng Fan, Tahir Cagin, Zhuo Min Chen, and Kennith A. SmithCite this: Macromolecules 1994, 27, 9, 2383–2391Publication Date (Print):April 1, 1994Publication History Published o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAmorphous, biomimetic granules of polyhydroxybutyrate: preparation, characterization, and biological implicationsDaniel M. Horowitz and Jeremy K. M. SandersCite this: J. Am. Chem. Soc. 1994, 116, 7, 2695–2702Publication Date (Print):April 1, 1994Publication History Published…
Argon and carbon ion bombardment of p-diamond at 500–5000 eV in ultrahigh vacuum were studied by in situ x-ray photoelectron spectroscopy (XPS) and low energy electron diffraction analysis. Both argon and carbon ion bombardment at room temperature in the present energy range created a defective surface layer. The radi…
Abstract The binary exchange of cations on clays and soils is generally regarded as a thermodynamically reversible process. The literature on soil chemistry and geochemistry, however, abounds with reports on cation exchange reactions that appear to have only limited reversibility, i.e., that exhibit hysteresis. A sati…
A lumped-component equivalent circuit has been developed by our team to model the electric behavior of any two-winding transformer. This circuit is general: its topology is independent of shape, sizes, and technology chosen. Changing the sample results only in a change of numerical values. Moreover, this circuit is su…
Factors controlling the initiation and propagation of crevice corrosion on alloy 625 (UNS N06625) in ocean water of ambient temperature were explored within the contexts of the Oldfield-Sutton model for critical crevice corrosion solution (CCS) development and the ohmic criterion for crevice corrosion initiation. Data…
The cloned poly-3-hydroxybutyrate (PHB) synthesis pathway from Alcaligenes eutrophus has been introduced into sucrose-utilizing strains of Escherichia coli, Klebsiella aerogenes, and Klebsiella oxytoca. The plasmid-borne genes were well expressed in these environments and were able to mediate the production of signifi…
Ferroresonant overvoltages or undervoltages can occur in cable-fed power transformer installations when single phase switching or interrupting is practiced. This paper identifies the ferroresonant circuit as a nonlinear dynamical system. Analysis and classification methods are presented which provide new insight into…
Grain growth kinetics in alumina‐rich, zirconia–alumina composites have been examined as a function of volume fraction of zirconia. Both he microstructural scale and character alter during grain growth. Grain growth exponents between n = 3 and 4 were observed and have been rationalized in terms of current models for g…
Abstract The compounds (NMe 4 ) 5 [As 2 Mo 8 V 4 AsO 40 ] · 3 H 2 O 2a , (NH 4 ) 21 [H 3 Mo 57 V 6 (NO) 6 O 183 (H 2 O) 18 ] · 65 H 2 O 3a , (NH 2 Me 2 ) 18 (NH 4 ) 6 [Mo 57 V 6 (NO) 6 O 183 (H 2 O) 18 ] · 14 H 2 O 3b and (NH 4 ) 12 [Mo 36 (NO) 4 O 108 (H 2 O) 16 ] · 33 H 2 O 4a ( 3a and 4a were not correctly reported…
We report an off-lattice Monte Carlo calculation of the equilibrium properties of a monodisperse polymer brush in a good solvent. We find that the density profile, in general, is in agreement with the results of self-consistent field theory, with some discrepancies observed near the wall and at the tail of the profile…
The properties of thin films of Cu with 1 at. % Al are explored. As-deposited films of Cu(1 at. % Al) oxidize orders of magnitude more slowly than do those of pure Cu. After Cu(1 at. % Al) films are annealed in Ar at 400 °C for 30 min, very thin protective layers of aluminum oxide form on the surface. These thin oxide…
It is shown that the interaction between soft atomic potentials in glasses leads to a density of the low-energy tunneling states, P\ifmmode\bar\else\textasciimacron\fi{}, which does not depend on the concentration of defects. The dimensionless parameter P\ifmmode\bar\else\textasciimacron\fi{}${\ensuremath{\gamma}}^{2}…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses of Mixed-Metal Sulfide Cubane-Type Clusters with the Novel PdMo3S4 Core and Reactivities of the Unique Tetrahedral Pd Site Surrounded by Sulfide Ligands toward Alkenes, CO, tBuNC, and AlkynesTakashi MurataTakashi MurataMore by Takashi Murata, Yasushi MizobeYasushi…
DC excitation of transformers due to geomagnetically induced currents was studied by model experiments. First, differences in the DC excitation phenomenon due to the iron core structure were studied using three typical small-scale models. The results verified that single-phase three-legged cores were most susceptible…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural Predictions in the ABO3 Phase DiagramDaniel M. Giaquinta and Hans-Conrad zur LoyeCite this: Chem. Mater. 1994, 6, 4, 365–372Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 April 1994https://pubs.acs.org/doi/1…