Materials Literature
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Hydrothermal synthesis has been used to synthesize nano‐sized manganese zinc ferrite powder. The results show that the pH value of the starting suspension has a decisive influence on the composition of the hydrothermally prepared manganese zinc ferrite powder. At a pH value of ∼8.5, stoichiometric amounts of manganese…
Abstract The solvent molecules included in the clathrates (δ‐form) of syndiotactic polystyrene (s‐PS) are removed by suitable extraction procedures. An emptied δ‐form is produced which is different from the known γ‐form obtained by heating. The structural changes induced by thermal treatments on emptied and filled cla…
We report the existence of a reversible pressure-induced first-order phase transition between the zinc-blende (B3) and the NiAs (B8) phase in the beryllium chalcogenides BeSe and BeTe at pressures of 56\ifmmode\pm\else\textpm\fi{}5 GPa and 35\ifmmode\pm\else\textpm\fi{}5 GPa, respectively. The NiAs phase remains stabl…
Recognition of antigens by immunocompetent cells involves interactions that are specific to the chemical sequence and conformation of the epitope (antigenic determinant). Adjuvants that are currently used to enhance immunity to antigens tend to either alter the antigen conformation through surface adsorption or shield…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolylactones. 35. Macrocyclic and Stereoselective Polymerization of .beta.-D,L-Butyrolactone with Cyclic Dibutyltin InitiatorsHans R. Kricheldorf and Soo-Ran LeeCite this: Macromolecules 1995, 28, 20, 6718–6725Publication Date (Print):September 1, 1995Publication History Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT90Mo NMR and kinetic studies of peroxomolybdic intermediates involved in the catalytic disproportionation of hydrogen peroxide by molybdate ionsV. Nardello, J. Marko, G. Vermeersch, and J. M. AubryCite this: Inorg. Chem. 1995, 34, 20, 4950–4957Publication Date (Print):Septem…
Boron carbide/titanium diboride composites with 20 and 40 vol% particulate TiB 2 and various amounts of free carbon were investigated with respect to microcrack toughening. In agreement with previous work, the mere addition of TiB 2 was found to raise the toughness from 2.2 MPa·m 1/2 up to 3.0 and 3.5 MPa·m 1/2 , resp…
Abstract This paper considers the fractal nature of primary and secondary carbon black aggregates in rubber and the implications for the mechanical and electrical properties of rubber goods. In particular, the effects of dispersion and primary aggregate breakup during mixing are investigated. Founded on recent studies…
What is the source of the epoxide oxygen in the Mo-catalyzed epoxidation of olefins? The olefinic side chain CH2CHCH2 of the isolated complex 1 (structure shown on the right) is epoxidized only on addition of hydroperoxides. Thus in complex 1, in contrast to previously proposed mechanisms for the title reaction, an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of Aniline with FeOCl. Formation and Ordering of Conducting Polyaniline in a Crystalline Layered HostC.-G. Wu, D. C. DeGroot, H. O. Marcy, J. L. Schindler, C. R. Kannewurf, T. Bakas, V. Papaefthymiou, W. Hirpo, J. P. Yesinowski, and Cite this: J. Am. Chem. Soc. 1995…
Thin two‐phase, Al 2 O 3 / t ‐Zr(3Y)O 2 layers bounded by much thicker Zr(3Y)O 2 layers were fabricated by co‐sintering powders. After cooling, cracks were observed along the center of the two‐phase, Al 2 O 3 / t ‐Zr(3Y)O 2 layers. Although the Al 2 O 3 / t ‐Zr(3Y)O 2 layers are under residual, biaxial compression far…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultistep Electron Transfer between Porphyrin Modules Assembled around a Ruthenium CenterAnthony Harriman, Fabrice Odobel, and Jean-Pierre SauvageCite this: J. Am. Chem. Soc. 1995, 117, 37, 9461–9472Publication Date (Print):September 1, 1995Publication History Published onli…
In this paper, we present a nonlinear constitutive relation for magnetostrictive materials that includes nonlinear coupling effects arising between temperature/preload and magnetic field strengths. The relations are derived from thermodynamic principles using Gibbs free energy expanded in a Taylor series with only the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Properties of Polyaniline and Poly(aniline-co-o-ethylaniline)Jeanine A. Conklin, Shu-Chuan Huang, Shiou-Mei Huang, Tianli Wen, and Richard B. KanerCite this: Macromolecules 1995, 28, 19, 6522–6527Publication Date (Print):September 1, 1995Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and Dynamics of Self-Assembling Peptide Nanotubes and the Channel-Mediated Water Organization and Self-Diffusion. A Molecular Dynamics StudyMichael Engels, Donald Bashford, and M. Reza GhadiriCite this: J. Am. Chem. Soc. 1995, 117, 36, 9151–9158Publication Date (Pr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactivity of Copper(II) Hydroxides and Copper(II) Alkoxides for Cleaving an Activated Phosphate DiesterMary Jane Young, Daphne Wahnon, Rosemary C. Hynes, and Jik ChinCite this: J. Am. Chem. Soc. 1995, 117, 37, 9441–9447Publication Date (Print):September 1, 1995Publication H…
This paper attempts to review the field of research into light emission from porous silicon. The driving force behind such research is the tantalizing goal of adding optoelectronic functions to the already impressive array of electronic functions provided by silicon-based devices. A silicon technology with included li…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of Metal Electronic Properties in Tuning the Second-Order Nonlinear Optical Response of Coordination Complexes. A Combined Experimental and Theoretical Investigation of a Homologous Series of (N,N'-Disalicylidene-1,2-phenylenediaminato)M(II) (M = Co, Ni, Cu) ComplexesSa…
Pyridoxal 5'-phosphate (PLP) acts as the coenzyme in a vast number of reactions in amino acid metabolism. The study of PLP enzymes is one of the most fascinating frontiers in enzymology, and now the mechanism s of several types of PLP enzymes are being discussed at the atomic level based on crystallographic, spectrosc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrdering Phenomena in Thin Block Copolymer Films Studied Using Atomic Force MicroscopyM. A. van Dijk and R. van den BergCite this: Macromolecules 1995, 28, 20, 6773–6778Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue…