Materials Literature
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Abstract Hydroxyl orientation has a major influence on the strength of the ionic interlayer bonding in micas because of the strong repulsion between the hydrogen and the interlayer cation (IC). In order to determine if other factors also influence the magnitude of the interlayer bond energy, the effect due to the vary…
Die ersten Acylisocyanide sind jetzt synthetisiert worden. Die hohe Carbonylaktivierung von Benzoylisocyanid (1) zeigt sich u. a. in der Acylierung von Inaminen; mit Acetylendicarbonsäureester reagiert (1) dagegen unter Cycloaddition. equation image
The method of self-consistent phonons is applied to the melting of the interchain phase locking of linear CDWs. The melting point is obtained as T c =0.11( m * / m ) 1/2 θ t , where m * is the effective mass of the phase mode phonon and θ t is its transverse Debye temperature essentially equal to the phase locking ene…
Methods for measuring residual stresses and distortions in welded structures are described and initial results are given of a survey being carried out during manufacture of warship hull sections. The stresses are determined by measuring the elastic strain induced in the plate and stiffeners due to contraction of the s…
Abstract Neu dargestellt wurden durch Tempern inniger Gemenge von aktiven Oxiden M 2 O 3 bzw. MO 2 und Alkalioxiden AO x (A = Na, K, Rb, Cs) bislang unbekannte kubische Formen von NaScO 2 (a = 4,52 5 Å), NaYO 2 (a = 4,79 1 Å), NaDyO 2 (a = 4,80 0 Å), NaTmO 2 (a = 4,74 3 Å), NaYbO 2 (a = 4,73 0 Å), NaLuO 2 (a = 4,71 5…
Efficient emission has been found in the phosphate phosphors, and under u.v. excitation. For the preparation of these phosphors, an appropriate firing temperature must be selected in regard to the ionic radius of rare earth ions. The luminescence intensity changes little over the wide range of activator concentration,…
Abstract not Available.
Electron diffraction studies of alkali-metal (Li, Na and K) and rare-earth metal (Eu) intercalates of lT-TaS2 reveal the existence of a number of complex super-lattice patterns which are interpreted in terms of a coupled charge density wave and periodic lattice distortion arising from a Kohn anomaly, rather than in te…
A self-avoiding walk on a lattice, confined between two planes, is examined as a model of the stabilization of a colloidal system by adsorbed polymer. If the walk interacts with neither plane, there is a repulsive force on the planes due to the decrease in the volume of configuration space available to the walk. This…
Abstract Two kinds of glassy crystalline phases (I and III) of cyclohexene were realized by different thermal treatments. The heat capacities of the glassy and the supercooled crystal-I and -III, as well as the stable crystalline phases were measured by an adiabatic calorimeter in the temperature range 12–300 K. The g…
Phase relations have been determined for the system Cu-Sb-As-S between 350 degrees C and 500 degrees C. A new compound, Cu 4 (As,Sb) 2 S 5 , the only quaternary phase synthesized in this study, has not yet been reported as a mineral. It is not stable in either the Cu-Sb-S or Cu-As-S ternary system yet is ideally a ter…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew tetrapyrrolic macrocycles. 18 and 20 .pi. Electron homoporphyrinsH. J. Callot and E. SchaefferCite this: J. Org. Chem. 1977, 42, 9, 1567–1570Publication Date (Print):April 1, 1977Publication History Published online1 May 2002Published inissue 1 April 1977https://pubs.acs…
Raman spectra of oriented single crystals of KNO 3 (II) have been recorded at 298 and 77 K. At both temperatures the data are in excellent agreement with the factor group analysis based on the generally accepted Pmcn space group. Additional spectral features observed near room temperature suggest the presence of a sig…
<p>As social networks, shared editing platforms and other collaborative systems are becoming increasingly popular, the demands for proper protection of the data created and used within these systems grows. Yet, existing access control mechanisms are not suited for the challenges imposed by collaborative systems.…
Film breakdown phenomena leading to transpassive high rate dissolution of nickel in nitrate electrolytes were investigated under controlled flow conditions. Current efficiencies for metal dissolution were determined as a function of current density at different p H, temperature, and nitrate ion concentration. Initiati…
Abstract Hellbernsteinfarbene Einkristalle von Na 3 AsS 3 kristallisieren kubisch, a = 8,57 3 Å; d rö = 2,52; d pyk = 2,47 g · cm −3 ; Z = 4. Die dreidimensionale Strukturaufklärung, 428 I 0 ‐Daten (0kl–4kl), MoKα, R = 6,9 und R′ = 7,6% für 428 von 443 möglichen Reflexen, zeigt, daß eine aufgefüllte Variante des NaClO…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe addition of alkyl halides to rhodium(I) dithiolene complexes. The synthesis, structure, and chemical properties of rhodium(III) acyl speciesChien-Hong Cheng, Bruce D. Spivack, and Richard EisenbergCite this: J. Am. Chem. Soc. 1977, 99, 9, 3003–3011Publication Date (Print…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of multifunctional triarylfluoroethanes. 1. Condensation of fluoro ketonesWilliam D. Kray and Robert W. RosserCite this: J. Org. Chem. 1977, 42, 7, 1186–1189Publication Date (Print):April 1, 1977Publication History Published online1 May 2002Published inissue 1 Apri…
Fission fragment tracks from neutron activation have been used to observe the alpha-emission-induced fragmentation in water of monodisperse particles of 239PuO2 of 0.30 μm geometric diameter into subparticles containing 60–10,000 plutonium atoms. The measured size distribution can be described by a power law relation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudy of metal oxide catalysts by temperature programmed desorption. 2. Chemisorption of oxygen on copper(II) ion-exchanged Y-type zeolitesMasakazu Iwamoto, Kouji Maruyama, Noboru Yamazoe, and Tetsuro SeiyamaCite this: J. Phys. Chem. 1977, 81, 7, 622–629Publication Date (Pri…