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 reaction layers between silicon carbide continuous fibers (Nicalon) and a calcium aluminosilicate glass‐ceramic (anorthite composition) matrix in hot‐pressed composites have been characterized both structurally and chemically using high‐resolution, field‐emission scanning transmission electron microscopy. Chemical…
An experimental study of the temporal evolution of two-dimensional drained soap froths is presented. The long-time behavior of the froth shows a linear dependence of the average bubble area on time. By keeping nearly constant and thin plateau borders at all times, deviations from 120\ifmmode^\circ\else\textdegree\fi{}…
Development of epilithic algal communities was monitored in fast- (29 cm∙s −1 ) and slow-current (12 cm∙s −1 ) outdoor experimental stream channels for 33 d following a simulated spate. Disturbance reduced diatom densities in both current regimes to equal levels, but recovery was more rapid in slow current. Maximum al…
Abstract Utilizing a newly developed apparatus, force‐length measurements were performed on a series of unfractionated random ethylene copolymers having different counit types and a wide composition range. By controling crystallization conditions, crystallinity levels could be varied over wide extremes and a complete…
The surface of titanium has been modified by covalent attachment of an organic monolayer anchored by a siloxane network. This coating completely covers the metal and allows controlled modification of surface properties by the exposed chemical endgroups of the monolayer forming surfactant. The attachment of such a film…
The triplet energy of alpha-terthienyl has been determined by heavy atom-induced optical absorption: the value of 39.7 +/- 1.5 kcal/mol is consistent with earlier energy transfer work. Combining this result with calorimetric data from optoacoustic calorimetry indicates that intersystem crossing occurs with at least 90…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of highly crosslinked poly(acrylamides) and poly(methacrylamides). A new class of macroporous polyamidesKenneth J. Shea, G. J. Stoddard, D. M. Shavelle, F. Wakui, and R. M. ChoateCite this: Macromolecules 1990, 23, 21, 4497–4507Publication Date…
A series of 66 terpolymers of dl-lactide, glycolide, and epsilon-caprolactone was synthesized for the purpose of identifying those materials which exhibited rapid degradation in vitro. Polymers having half-lives from a few weeks to several months were identified. The morphology of each material was characterized by di…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA quasi-tetrahedral tetracopper cluster with syn-anti bridging carboxylate groups: crystal and molecular structure and magnetic propertiesEnrique Colacio, Jean Pierre Costes, Raikko Kivekas, Jean Pierre Laurent, and Jose RuizCite this: Inorg. Chem. 1990, 29, 21, 4240–4246Pub…
Quantum-confinement effects in CdSe microcrystallites in a glass matrix are investigated in the nanosecond time domain. The results of pump–probe and single-beam absorption saturation measurements show strong evidence for electron–hole quantization in the semiconductor microstructures, a different bleaching behavior f…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Silica glasses were prepared by three different techniques, vapor phase axial deposition method, oxidation of SiCl4 in O2-H2 flame, and O2 or O2-Ar plasma method with changing preparation conditions. This was done with the expectation that O2 molecules dissolve in the glasses with different concentrations by using a w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIonically crosslinkable polyphosphazene: a novel polymer for microencapsulationSmadar Cohen, M. Carmen Bano, Karyn B. Visscher, Marie Chow, Harry R. Allcock, and Robert LangerCite this: J. Am. Chem. Soc. 1990, 112, 21, 7832–7833Publication Date (Print):October 1, 1990Publica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxalato-bridged and related dinuclear copper(II) complexes: theoretical analysis of their structures and magnetic couplingSantiago Alvarez, Miguel Julve, and Michel VerdaguerCite this: Inorg. Chem. 1990, 29, 22, 4500–4507Publication Date (Print):October 1, 1990Publication Hi…
It frequently occurs that a biological assembly in a crystallographic asymmetric unit has more than one noncrystallographic symmetry operator. For instance, a tetramer might have the point group 222 or a spherical virus will have the point group 532. A self-rotation function searches for the direction and angle of rot…
Article Geometrische Größen und einfache Modellrechnungen für BO4-Gruppen was published on October 1, 1990 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 191, issue 1-4).
Abstract not Available.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolythioamide synthesis through chemical modification of polyamidesMylene Deletre and Guy LevesqueCite this: Macromolecules 1990, 23, 22, 4876–4878Publication Date (Print):October 1, 1990Publication History Published online1 May 2002Published inissue 1 October 1990https://do…
Abstract A relative increase of the lattice parameters equal to 2.05 × 10 −3 ± 1.8 × 10 −4 is established by X‐ray analysis in ultradisperse powder diamond with average size of crystallites equal to 4.6 ± 0.4 nm as compared with the lattice parameter of a large‐crystal sample. The effect found for diamond as well as t…
Abstract Ausgehend von dem bekannten Konzept der lokalen Dauerfestigkeit werden Probleme bei dessen Anwendung auf martensitische Randschichten, insbesondere Laserhärtungsschichten, erörtert. Es wird eine Methode für die Berechung der Dauerfestigkeit randschichtgehärterer Proben bzw. Bauteile aus martensitisch härtbare…