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。
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal modification of freshly precipitated aluminum hydroxide by lithium ion intercalationMoshe Frenkel, Abraham Glasner, and Sara SarigCite this: J. Phys. Chem. 1980, 84, 5, 507–510Publication Date (Print):March 1, 1980Publication History Published online1 May 2002Publish…
The crystal structure of the potassium salt of dihydrouridine 3'-monophosphate hemihydrate, K+.CgH14 N209P-.½H20, a modified nucleotide, has been determined from three-dimensional X-ray crystallographic data. The nucleotide crystallizes in the space group C2 with unit-cell dimensions a = 22.638 + 0.007, b = 5.765 + 0.…
An improved apparatus for determining the fracture strength of brittle materials by a hydraulic bursting technique is described. The new design greatly reduces the number of specimens which fail at their edge and reduces the scatter in the results. To complement this, a more detailed theory is developed to analyse res…
The first application of n-Si as an efficient photoelectrode for the photoelectrolysis of water is reported. The Si surface has been coated with a thin layer of iron-oxide to overcome corrosion problems in an electrolyte. By using this heterostructure electrode as a photoanode in a photo-electrochemical cell, O 2 -evo…
The synthesis and characterization of the first nematic transition metal complex and of smectic complexes of the dithiene type are described.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal-nitroxyl interactions. 14. Bis(hexafluoroacetylacetonato)copper(II) adducts of spin-labeled pyridinesP. M. Boymel, G. R. Eaton, and S. S. EatonCite this: Inorg. Chem. 1980, 19, 3, 727–735Publication Date (Print):March 1, 1980Publication History Published online1 May 20…
Abstract Polyterephthalamides of high molecular weight (η inh up to 1.9) were obtained by the direct polycondensation reaction of terephthalic acid and aromatic diamines in the presence of poly(ethylene oxide) (PEO) with triphenyl phosphite in a N ‐methylpyrrolidone (NMP)–pyridine solution that contained lithium chlor…
The potential difference between grain boundary and bulk and the concentrations of native and foreign point defects in the bulk, the grain boundary ( gb ), and the subgrain boundary space‐charge region ( sg ) of polycrystalline Al 2 O 3 doped with acceptors are computed for the case that the dopants segregate at the g…
Abstract The polycondensation reaction of aromatic dicarboxylic acids and diamines by using triphenyl phosphite were carried out in N ‐methylpyrrolidone (NMP) in the presence of poly(4‐vinylpyridine) (P4VP). The reaction, especially of terephthalic acid (TPA), was markedly facilitated to give the absence of P4VP. The…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal data for mixed-anion molybdenum dichalcogenidesLynn F. Schneemeyer and M. J. SienkoCite this: Inorg. Chem. 1980, 19, 3, 789–791Publication Date (Print):March 1, 1980Publication History Published online1 May 2002Published inissue 1 March 1980https://pubs.acs.org/doi/1…
Magnetic properties of several batches of commercial
Heat‐transfer theory was used to analyze the variables which control the thermal stress fracture of brittle ceramic specimens subjected to rapid cooling by quenching into fluid media. Expressions were derived for the maximum quenching temperature difference to which circular solid cylindrical specimens can be subjecte…
Abstract The effect of recycling on the properties of injection molded polycarbonate was investigated. One unreinforced and two glass‐reinforced grades were studied. Fiber degradation was distinguished from molecular scission by spiral flow measurements and molecular weight analysis. During the first cycles the averag…
The partial quenching of the fluctuations of orientation of nematic layers by very large magnetic fields predicted by de Gennes and leading to increased birefringence has received a first experimental verification by Poggi and Filippini. In this paper a detailed account of this effect is given: the progressive disappe…
Acinetobacter calcoaceticus was grown in 11-liter batch fermentations with hexadecane or sodium citrate as the sole source of carbon. Surface and interfacial tension measurements of the microbial broth indicated that surface-active compounds were being produced only during growth on the hydrocarbon substrate. Contact…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMacroions and Macroion Pairs in the Anionic Polymerization of β-Propiolactone (β-PL)Stanislaw Slomkowski and Stanislaw PenczekCite this: Macromolecules 1980, 13, 2, 229–233Publication Date (Print):March 1, 1980Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSub-part-per-billion determination of total dissolved selenium and selenite in environmental waters by x-ray fluorescence spectrometryHarry J. Robberecht and Rene E. Van GriekenCite this: Anal. Chem. 1980, 52, 3, 449–453Publication Date (Print):March 1, 1980Publication Histo…
A simple expression is presented which can be used to estimate the mean free paths of electrons in solid organic insulators as a function of the electon energy. Input parameters are the molecular weight and the density of the organic sample. The range of validity is 100 eV to 10 keV. It is demonstrated that, for this…
The low-temperature exciton luminescence of silicon has been measured and analyzed on the basis of rate equations describing the formation and decay kinetics of free exciton, bound exciton and bound multiexciton complexes. In particular, the excitation-level and impurity-concentration dependences of the luminescence-i…
Abstract The finite deformation elasticity of gels of stiff rodlike polymer chains is discussed theoretically. Unlike a rubber composed of flexible polymer chains, the elasticity of this system is energetic, and arises from the elastic deformation of the stiff chains which are forced to bend under macroscopic strain.…