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。
Based on the ideas of Landau-de Gennes theory applied to nematic liquid crystals, several forms for the variation of the order parameter as a function of temperature are investigated over a wide nematic range. These functional forms are used to fit the experimental order parameters, determined through the use of C-13…
Abstract The paper consides the effects of compatibilization with maleic anhydride grafted polypropylene (PP‐g‐MAH) on the propertie of immiscible blends of polypropylene (PP) and nylon 6 (N6). We prepared the blends by three different mixing processes; single‐step blending, two‐step blending with reactive premixing,…
The ground state single-electron reduced density matrix is shown to contain the essential chemical bonding information relevant for calculating the nonlinear optical response of conjugated polymers. Applications to a series donor-acceptor substituted Hexatrienes demonstrate the interplay of electronic structure and dy…
Abstract Cu montmorillonite heated with or without potassium halide was studied by IR and ESR spectroscopy, supplemented by XRD measurements, microprobe and chemical analyses. It appears that on heating Cu montmorillonite, most of the Cu ions migrate into hexagonal cavities and eventually, when dehydroxylation occurs,…
ABSTRACT Experiments were undertaken in a recirculating flume to determine the relationships among water velocity, thallus area, drag, and the probability of thallus breakage or detachment in the foliose green alga Ulva lactuca L. In all specimens tested to breaking point, thalli detached from their bivalve substrates…
The dynamics of a Sm-${\mathit{C}}^{\mathrm{*}}$ director field in an ac electric field has been studied by means of light scattering. Scattering of resonance type has been observed by variation of field frequency at fixed temperatures. The resonance scattering is suppressed in high electric fields, at low temperature…
The proposed pH buffering and phosphagenic functions of polyphosphate were investigated by subjecting chemostat-cultivated Saccharomyces cerevisiae to alkalinization (NaOH addition) and anaerobiosis. The subsequent changes in intracellular phosphate-containing species were observed in situ by nuclear magnetic resonanc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNeutron Reflectometry Study of Surface Segregation in an Isotopic Poly(ethylenepropylene) Blend: Deviation from Mean-Field TheoryL. J. Norton, E. J. Kramer, F. S. Bates, M. D. Gehlsen, R. A. L. Jones, A. Karim, G. P. Felcher, and R. KlebCite this: Macromolecules 1995, 28, 25…
Abstract Titanites rich in antimony (up to 12.59 wt.% Sb 2 O 5 ; equal to 0.165 Sb 5+ per Si 4+ = 1.000) arc described for the first time. They coexist with various greenschist-facies minerals in three different petrographical environments in the manganese concentrations at St. Marcel-Praborna in the Aosta Valley, Ita…
Abstract The resin transfer molding (RTM) technique often utilizes reinforcement with a complex fiber architecture. Several parameters, including the permeability tensor, are necessary to characterize the flow behavior in these intricate fibrous porous media. In this paper, a general procedure for extracting three‐dim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation and Stability of Ni(I) Ions in MCM-41 Mesoporous Molecular SievesMartin Hartmann, Andreas Poppl, and Larry KevanCite this: J. Phys. Chem. 1995, 99, 49, 17494–17496Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published iniss…
A major field of neural networks (NN) application is function estimation, because the useful properties of NN such as adaptivity and nonlinearity are well suited to function estimation tasks where the equation describing the function is unknown. In this paper the prerequisite trainiing data are obtained from experimen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-Organization of Polymethine Dyes in Thin Solid LayersLars DaehneCite this: J. Am. Chem. Soc. 1995, 117, 51, 12855–12860Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1 December 1995https://doi.org/10.1021/ja00156…
Development of tensorial constitutive equations suitable to model the thermomechanical behaviour of shape memory alloys (SMA) would greatly help engineering design of sophisticated components. While a number of studies have focused on mechanical behaviour under tensile loading, only a few have been done to characteris…
Abstract The surface science of oxides has received considerably less attention than the study of metal surfaces. We review some of our work on structural characterization and electronic structure investigations on oxide surfaces which we prepare as thin oxide films on metallic substrates. This preparation method lead…
When in a powder diffraction pattern two or more peaks heavily overlap, the integrated intensities of the overlapping reflections are correlated. This paper describes a method, based on the study of the peak overlap, which estimates the number of statistically independent intensities associated with a powder diagram.…
Abstract Thin films of poly(styrene‐ block ‐methyl methacrylate) diblock copolymer [P(St‐ b ‐MMA)] with thickness ca. 50 nm were prepared by a dip‐coating method. The surface T g for the P(St‐ b ‐MMA) thin film was evaluated on the basis of the temperature‐dependent X‐ray photoelectron spectroscopic (TDXPS) measuremen…
In order to diminish the overpotential required for the electrochemical reduction of CO 2 , a metal complex‐fixed polyaniline (PAn)/prussian blue (PB)‐modified electrode has been developed, and the roles of the two laminated films as well as a fixed metal complex are disclosed here. The onset potential for the reducti…
Due to the inherent complexity of the general Lifshitz theory, the Hamaker–De Boer approach is still used in computing the van der Waals attractive force in systems with macrobodies of complex shapes. To account for the retardation of force computed by this approach, the London equation has in the past been modified b…
A computer code with the capability of simultaneously estimating the concentrations of radiolysis species, the electrochemical corrosion potential, and the kinetics of growth of a reference crack in sensitized Type 304 stainless steel is developed for the heat transport circuits of boiling water reactors (BWRs). The p…