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 ISSUEPREVArticleNEXTBiomimetic aerobic 1,4-oxidation of 1,3-dienes catalyzed by cobalt tetraphenylporphyrin-hydroquinone-palladium(II). An example of triple catalysisJ. E. Baeckvall, A. K. Awasthi, and Z. D. RenkoCite this: J. Am. Chem. Soc. 1987, 109, 15, 4750–4752Publication Date (Print):July…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPressure effects on dielectric relaxation of supercooled ortho-terphenylMotosuke. Naoki, Hideki. Endou, and Katsuhiro. MatsumotoCite this: J. Phys. Chem. 1987, 91, 15, 4169–4174Publication Date (Print):July 1, 1987Publication History Published online1 May 2002Published iniss…
Abstract Complexes between diphenylcarbamido‐dicarboxybenzene and 1‐methyl‐2‐pyrrolidinone, 1/4 and 1/2 M, are obtained by reacting pyromellitic dianhydride with aniline in the solvent 1‐methyl‐2‐pyrrolidinone. Decomplexation and imidization of this diamic acid are studied by thermogravimetric analysis, differential s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT21-Thiatetra-p-tolylporphyrin and its copper(II) bicarbonate complex. Structural effects of copper-thiophene bindingLechoslaw Latos-Grazynski, Jerzy Lisowski, Marilyn M. Olmstead, and Alan L. BalchCite this: J. Am. Chem. Soc. 1987, 109, 14, 4428–4429Publication Date (Print):…
SUMMARY Images in the scanning electron microscope (SEM) are formed from both low‐energy secondary, and high‐energy backscattered, electrons. The quantitative interpretation of SEM images therefore requires a model which can predict the magnitude of both of these signal components for a specimen whose geometry and che…
The upconversion of infrared radiation into green and red fluorescence has been studied for Er3+ and Yb3+ ions in BaF2/ThF4 fluoride glass over a wide temperature range and several dopant concentrations. At room temperature an upconversion efficiency of 3.3×10−5 has been obtained for the green emission from the glass…
Four new organic hosts are described that contain a phthalocyanine core to which four crown ether rings are attached.These hosts include a free base phthalocyanine with 18-crown-6 rings and three copper phthalocyanines with 15-crown-5, 18-crown-6, and 21-crown-7 rings.The macrocycles are synthesized from benzo crown e…
We have studied experimentally the dynamics of soap froths in two dimensions. We observe two temporal regimes: a transient in which the average bubble area increases in time faster than a power law, and long-term behavior in which the average bubble area increases (over the decade observed) as a power law with exponen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMoessbauer study of D. gigas ferredoxin II and spin-coupling model for Fe3S4 cluster with valence delocalizationV. Papaefthymiou, J. J. Girerd, I. Moura, J. J. G. Moura, and E. MuenckCite this: J. Am. Chem. Soc. 1987, 109, 15, 4703–4710Publication Date (Print):July 1, 1987Pu…
This study introduces a simple in vitro arrangement to measure current densities of implant metals. The in vivo condition of a metallic implant lying in tissues exhibiting different redox potentials is simulated in so-called straddle tests by applying a constant potential difference of 250 mV in saline containing the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of surface tungsten oxide species in the tungsten trioxide/alumina supported oxide system from x-ray absorption near-edge spectroscopy and Raman spectroscopyJ. A. Horsley, I. E. Wachs, J. M. Brown, G. H. Via, and F. D. HardcastleCite this: J. Phys. Chem. 1987, 91,…
This book provides an up-to-date treatment of synthetic metals - a rapidly moving area of industrial and academic research. It discusses four classes of conductors having a high metal-like conductivity: synthetic organics, charge-transfer salts, organic polymers, and transition-metal-containing conductors.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBicontinuous microdomain morphology of block copolymers. 1. Tetrapod-network structure of polystyrene-polyisoprene diblock polymersHirokazu Hasegawa, Hideaki Tanaka, Komei Yamasaki, and Takeji HashimotoCite this: Macromolecules 1987, 20, 7, 1651–1662Publication Date (Print):…
Because of their practical interest, wetting phenomena have been the subject of many experimental and theoretical investigations in the past. However, no coherent description of this field had been obtained until recently. Some intriguing paradoxes remained unsolved. For example, once spreading is achieved, the rate o…
Abstract A method was developed to determine the concentrations of oxalate‐extractable Fe(III) and Fe(II) in sediments. Sediment was extracted in acid ammonium oxalate under N 2 . Iron(II) in the extract was determined with ferrozine. Iron(III) in the extract was reduced with hydroxylamine‐hydrochloride, and total Fe…
The term “white-layer” refers to hard layers of material which resist etching and appear featureless and white under the microscope. This paper presents some of the publications on white layer formed during machining and deformation processes. The mechanisms of white layer generation are discussed and to the three tra…
Despite the great technological importance of hydrogen embrittlement in many metals and alloys, and the many investigations thereby motivated, no firm consensus exists on the mechanism in any one case. This review concentrates on the degradation of ferrous alloys by hydrogen, discussing the often conflicting results o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility of amorphous chromium(III)-iron(III) hydroxide solid solutionsBruce M. Sass and Dhanpat RaiCite this: Inorg. Chem. 1987, 26, 14, 2228–2232Publication Date (Print):July 15, 1987Publication History Published online1 May 2002Published inissue 15 July 1987https://pubs…
Polymers produced by horseradish-peroxidase-catalyzed coupling of phenols have been explored as potential substitutes for phenol-formaldehyde resins. To overcome low substrate solubilities and product molecular weights in water, enzymatic polymerizations in aqueous-organic mixtures have been examined. Peroxidase vigor…
Consolidation experiments conducted on special prepregs made of constant viscosity oils and aligned graphite fibers are reported. Measurements of the deformation behavior of the fibers in the "drained" state (oil impregnated, but zero pressure in the oil) reveal that, to a first approximation, the fiber network can be…