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The omega phase in as-quenched and aged Ti-V alloys was examined using high-resolution dark-field microscopy and selected-area diffraction. The asquenched omega morphology was shown to be based upon 〈111〉β‖〈0001〉ω rows containing particles which are 10-22 Å in diameter with an interparticle spacing of 20-25 Å. Cluster…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical studies of tetraphenylporphin, tetraphenylchlorin, and tetraphenylbacteriochlorinGeorge S. Wilson and Gerald. Peychal-HeilingCite this: Anal. Chem. 1971, 43, 4, 550–556Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Publish…
Recent electron (ESCA) and x-ray emission and absorption spectra for the cubic refractory carbides of Group IVb (TiC, ZrC, HfC) and Group Vb (VC, NbC, TaC) are summarized. Based on an interpretation of the experimental data by using self-consistent-field calculations on free atoms and ions and supported by an approxim…
Special techniques of metallurgical microscopy are reviewed. The mathematical presentation is kept to a minimum. The emphasis is on technique, showing how various physical factors affect the situation being considered. Illustrated with numerous photomicrographs and diagrams. The author is with C.S. 1.R.O., Melbourne,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlass transition in amorphous water. Application of the measurements to problems arising in cryobiologyDon H. Rasmussen and Alan P. MacKenzieCite this: J. Phys. Chem. 1971, 75, 7, 967–973Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of high polymersJohn. Mitchell and Jen. ChiuCite this: Anal. Chem. 1971, 43, 5, 267–334Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Published inissue 1 April 1971https://pubs.acs.org/doi/10.1021/ac60300a021https://doi.org/10.10…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared spectra of ground graphiteRobert A. Friedel and Gerald L. CarlsonCite this: J. Phys. Chem. 1971, 75, 8, 1149–1151Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Published inissue 1 April 1971https://pubs.acs.org/doi/10.1021/j10067…
Abstract There are four Debye equations for dilute solutions which can be used to determine the relaxation time of a polar solute molecule. This paper offers a critical examination of these equations, especially two representative formulas which are mutually independent. If the solute molecule has a non-rigid configur…
Selective light reflection at the plane structure of a cholesteric liquid crystal is treated by the theory of de Vries(1) for normal incidence only. A more general approach is outlined for arbitrary angles of incidence. Conditions for the borders of the reflection bands are given. Also the cases of ordinary total refl…
Beta-gadolinium molybdate, β-Gd2(MoO4)3, is ferroelectric and ferroelastic with a Curie temperature of about 160°C and is paramagnetic with a moment of 7.98 μB. β-Gd2(MoO4)3 crystallizes in the orthorhombic system with space group Pba2 and four formulas in the unit cell. The lattice constants at 298°K are a = 10.38582…
When electron-lifetime effects, electron-hole pair excitations, or both are included in the description of an electron gas, the frequency associated with the surface plasmon is a complex quantity, the imaginary part providing a measure of the damping of the plasmon. The surface-plasmon dispersion relation then involve…
Abstract Dynamic mechanical and dielectric properties of various kinds of polystyrene, including bulk‐polymerized, monodisperse, isotactic, and thermally degraded samples, have been measured below the glass temperature to 4°K. Five relaxation processes are found, designated β, γ, γ′, δ, and ε in order of descending te…
Complete, three-dimensional crystal structure studies, including site-occupancy refinement, of a high-iron epidote, allanite, and hancockite have yielded cation distributions Cal. ooCal.oo(Alo. 93F eo.05) Ah. 00(Alo.24F eo.76) Si30'3H for epidote, Ca,. oo(REo.74Ca0.26) (Alo...FeO.34)Ah.oo(Alo.17Feo. 83) ShO'3H for all…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of ferrichrome as a ferric ionophore in Ustilago sphaerogenaThomas EmeryCite this: Biochemistry 1971, 10, 8, 1483–1488Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Published inissue 1 April 1971https://pubs.acs.org/doi/10.1021/bi007…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFar-infrared and electronic spectra of some bis(ethylenediamine) and related complexes of copper(II) and the relevance of these data to tetragonal distortion and bond strengthsAlfred B. P. Lever and Elvio MantovaniCite this: Inorg. Chem. 1971, 10, 4, 817–826Publication Date…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural, magnetic, and optical properties of nickel oxide supported on .eta.- and .gamma.-aluminasAlessandro Cimino, M. Lo Jacono, and M. SchiavelloCite this: J. Phys. Chem. 1971, 75, 8, 1044–1050Publication Date (Print):April 1, 1971Publication History Published online1…
The partial purification and characterization of a factor from skeletal muscle which inhibits the activity of adenosine 3',5'-monophosphate-dependent protein kinases from skeletal muscle, heart, liver, adipose tissue, and brain is described. The inhibitor is stable to heating at 96° and to precipitation with 5%, w/v,…
CONTENTS Introduction 286 1. Model of a Thin Twin 289 2. Certain Properties of the Profile of a Twin 292 3. Why an Elastic Twin is Thin 296 4. Hysteresis Associated with Elastic Twinning 299 5. A Twin in a Lamina. Experimental Determination of the Parameters of the Theory 306 6. The Theory of I. M. Lifshitz and the Di…
The frequency-wave-vector dispersion relation $\ensuremath{\nu}(\stackrel{\ensuremath{\rightarrow}}{\mathrm{q}})$ for the normal vibrations of a CuCl single crystal at room temperature has been measured for the [100]-, [110]-, and [111]-symmetric directions using inelastic neutron scattering.
A simple, empirical connection between electronic and lattice ionicity is reported for $45 {A}^{N}{B}^{8\ensuremath{-}N}$ compounds. The Szigeti charge per effective ionic valence is found to be equal to the ratio of Phillips' electronegativity difference $C$ and the plasma energy of the free-valence-electron gas. Dev…