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。
An over-all view of the solution luminescence of metal complexes is given. The three major classes of emission are examined in moderate detail including brief discussions of theoretical considerations. These are attuned to the problem of predicting which metal ion—ligand combinations should form luminescent compounds.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-pressure synthesis of rare earth polysulfidesAlan Wendell Webb and Howard Tracy HallCite this: Inorg. Chem. 1970, 9, 5, 1084–1090Publication Date (Print):May 1, 1970Publication History Published online1 May 2002Published inissue 1 May 1970https://pubs.acs.org/doi/10.102…
Summary The formation and structure of glass is described and elementary wave-mechanics is used to show that, despite the disordered liquid-like configuration, electron energy-bands will nevertheless be formed in semiconducting glasses. The main effect of the disordered structure is to cause the formation of a high de…
The variation of total normal emittance as a function of oxide thickness on a metal sub strate is investigated experimentally for Al-Al2O3 and Cu-CuO systems. The measurements are made using a comparative black-body technique. Over the range of aluminumoxide thicknesses investigated (1.2μ–86.4μ) the total normal emitt…
Presented in this paper are some new analytical results for two exchange-coupled magnetic thin films. The formulation of the problem which is used is similar to that of Goto et al., who reduced the determination of the magnetic configuration of the films in the presence of an external magnetic field to the evaluation…
Static magnetic susceptibilities of simplified model vibronic systems where non-Kramers paramagnetic ions in triplet ground state interact either with localized tetragonal modes of vibration with sharp frequency spectrum at ω (localized model), or with tetragonal modes composed of the superposition of phonons with con…
Critical nominal stress and critical stress intensity factors for sulfide stress corrosion cracking of various steels were determined using fatigue-precracked, laboratory, cantilever beam specimens and short lengths of oil field casing and tubing pressured to failure. The laboratory critical constants were found to be…
The present paper is concerned mainly with studies from my laboratory on regeneration of the lizard's tail. Over the past five years my students and I have focused our attention on: (1) a careful description of the histology of tail regeneration; (2) the role of neural elements (nerve and ependyma) in the initiation o…
The statistical relationships between surface chlorophyll concentration and the depth, chlorophyll content, and primary productivity of the euphotic layer have been investigated. They all proved to be statistically significant.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTManganese porphyrin complexes. III. Spectroscopy of chloroaquo complexes of several porphyrinsLaurence J. BoucherCite this: J. Am. Chem. Soc. 1970, 92, 9, 2725–2730Publication Date (Print):May 1, 1970Publication History Published online1 May 2002Published inissue 1 May 1970h…
The oxygen index method is shown to be a valuable tool for the investigation of the flammability of textile samples as a function of their chemical composition. Measurements of limiting oxygen index (LOI) are reported for polyester/cotton blends of varying composition, and for 50/50 polyester/cotton blends in which on…
Abstract Face rates of growth of ammonium and potassium dihydrogen phosphate crystals have been measured for crystallisation from pure solutions and from solutions that contained known amounts of foreign ions. The level of supersaturation and the solution pH both effect the crystal habit. Low supersaturation at normal…
Representations of the displacements and distortions produced by dislocation loops are given as Fourier integrals. These integrals are then reduced, to obtain solutions which are more explicit than any obtained previously, for the fields produced by infinite straight dislocations, a finite straight segment of a disloc…
Results obtained by Devin [J. Acoust. Soc. Amer. 31, 1654–1667 (1959)] for the damping constants of resonant bubbles are extended to the off-resonance case. Calculated results show for the range of conditions considered that thermal damping is important for bubbles driven below resonance, and radiation damping is impo…
Abstract Zinc adsorption was studied in suspensions of 10 calcareous Arizona soils in dilute ZnSO 4 solutions. At low concentrations, Zn 2+ adsorption was described by the Langmuir adsorption equation. The calculated Langmuir adsorption maxima were related to the carbonate and organic matter contents of the soils. Whe…
An analysis of the switching mechanism in semiconducting glasses is given which indicates that the actual switching involves electronic processes which prevent a thermal runaway. The rapid and reversible transition between the highly resistive and conductive states can have a thermal origin from Joule's heating of a c…
This paper describes the isolation from reduced collagen of two new amino acids believed to be involved, in their non-reduced form, as intermolecular cross-links stabilizing the collagen fibre. The reduction of intact collagen fibrils with tritiated sodium borohydride was found to stabilize the aldehyde-mediated cross…
The ferroelectric properties of a single crystal of Pb(Zn 1/3 Nb 2/3 )O 3 were investigated in the ferroelectric and paraelectric temperature regions. The crystal undergoes a ferroelectric phase transition in a wide temperature range, changing from cubic perovskite structure to rhombohedral one. A broad peak was obser…
Electromigration studies of large- and fine-grain aluminum films showed that fine-grain films were characterized by a mixed orientation and a grain size of ≈2 μ, and that large-grain films had a highly preferred 98% 〈111〉 orientation and a grain size of ≈8 μ. Stripes fabricated from the large-grained films had a consi…
CHAIN FOLDING is one of several unexpected features of long-chain polymer crystals that have come to light during the last decade or so. The polymers that exhibit these features are among our most important synthetic products—nylon and polyethylene, for example—and also abound in nature. The organization of their long…