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。
The dependence of the Raman-scattered intensity on exciting frequency is investigated theoretically for the case where this frequency is close to an absorption line or absorption band of the scattering crystal. Both spontaneous and stimulated Raman scattering are discussed. For scattering by electronic levels of impur…
Abstract A theoretical model for interstitial liquid flow in a stationary or moving foam was devised by relating the physical structure of the foam to the physical properties of the surfactant and the foam movement. This was accomplished through a differential momentum balance within a typical capillary (Plateau borde…
The Hamiltonian (Pauli approximation) which gives rise to the spinrotation coupling tensor and the electron spin g tensor is set up for a 2Σ polyatomic molecule. A relationship between the spin-rotation interaction and the Zeeman effect is suggested. The magnitudes of those terms which prevent this relationship from b…
Beta‐ray spectroscopy and radiotracer techniques have been used to study the transport of metal and oxygen during anodic oxidation. Both species are mobile during oxide film growth on Al, Nb, Ta, and W, but in Zr and Hf only oxygen transport is observed. Radiotracer measurements showed that the amount of metal dissolv…
Kinetic data for the formation of metal complexes obtained by various methods show that the complex formation of ML from metal ion, M, and ligand, L, can be described in terms of a rapid pre-equilibrium, involving formation of an outer sphere complex M(H 2 O)L, which then loses water in the rate-determining step of in…
A general method for the calculation of orbital energy differences within a partially filled l-shell of a central ion in an inorganic chromophore is described. The angular overlap model covers σ, π and δ anti-bonding (as well as bonding) effects, and it is shown that the consequence of the model is identical with that…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared and Gravimetric Study of the Surface Hydration of γ-AluminaJ. B. PeriCite this: J. Phys. Chem. 1965, 69, 1, 211–219Publication Date (Print):January 1, 1965Publication History Published online1 May 2002Published inissue 1 January 1965https://pubs.acs.org/doi/10.1021/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the Colloidal Hydrated Calcium Silicates. II. Solubility Relationships in the Calcium Oxide-Silica-Water System at 25°S. A. Greenberg and T. N. ChangCite this: J. Phys. Chem. 1965, 69, 1, 182–188Publication Date (Print):January 1, 1965Publication History Pub…
A. W. Johnson and I. T. Kay, J. Chem. Soc., 1965, 1620 DOI: 10.1039/JR9650001620
An investigation of the permeation rate of electrolytic hydrogen through Armco iron single crystals and polycrystals by an electrochemical technique is described. The variation of the permeation rate with cathodic overpotential has been determined in alkaline , alkaline cyanide, acidic , acidic iodide, acidic napthale…
The oxidation of MoSi 2 , Mo 5 Si 3 , and Mo 3 Si has been studied at temperatures of 1300°–2000°K, and at oxygen partial pressures of 2–20 Torr. Below 1970°K, at oxygen pressures around 10 Torr, measurements of the rate of total oxygen consumption vs. time show an initial period of high linear rate, an intermediate r…
By considering adsorption processes of organic compounds as being determined by the electronic distribution in the "anchoring" group of an adsorbate, a correlation has been derived between adsorption measurements and Hammett‐like substituent constants through the use of Linear Free Energy Relations (LFER). The analysi…
Influence of fiber and matrix characteristics on mechanics of deformation and fracture of fibrous composite
Properties of piezoelectric crystals and ceramics are reviewed as they affect use of such materials in electroacoustic transducers. Extensive data on lead titanate-zirconate ceramics are presented to help in selection of the appropriate material for a variety of applications in the lower and medium frequency range, up…
The rate-theory approach of Eyring and the free-volume theory of Cohen and Turnbull for liquid viscosities have been reconsidered. The rate theory has been reformulated using the Cohen and Turnbull expression for the probability of finding a vacant site and yields an equation of the form η=A0exp[Ev*/RT+γV0/Vf].This re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-Ray Diffraction in Crystals, Imperfect Crystals, and Amorphous Bodies.Bernard BorieCite this: J. Am. Chem. Soc. 1965, 87, 1, 140–141Publication Date (Print):January 1, 1965Publication History Published online1 May 2002Published inissue 1 January 1965https://pubs.acs.org/do…
The theory of phase separation from a single phase fluid by a spinodal mechanism is given. The predicted structure may be described in terms of a superpositioning of sinusoidal composition modulations of a fixed wavelength, but random in amplitude, orientation, and phase. Sections through a calculated structure are sh…
CONTENTS I. Introduction 609 II. Dependence of thermal stability on structure of monomer unit 610 III. Dependence of thermal stability on structure of polymer chain 615 IV. Dependence of thermal stability on reactivity of macromolecule 619 V. New thermostable polymers 624
An alcoholic extract of Asclepias curassavica L., a plant widely used in folk medicine for treating cancer and warts, shows cytotoxic activity when tested in vitro against cells derived from human carcinoma of the nasopharynx. Systematic fractionation of the extract has led to isolation and characterization of calotro…
Received 13 November 1964DOI:https://doi.org/10.1103/PhysRevLett.13.764©1964 American Physical Society