Materials Literature
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In 0.5[xPZ-(1-x)PT]-0.5[yPZN-(1-y)PNN] system ceramics, the dielectric and piezoelectric properties, the temperature and electric field dependences have been studied as a function of PT and PZN content. In both calcined powders and fired samples with the addition of columbite precursor materials, a presence of the pyr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical versus thermal electron transfer between iridium(I) maleonitriledithiolate complexes and methyl viologenElise Graham Megehee, Curtis E. Johnson, and Richard EisenbergCite this: Inorg. Chem. 1989, 28, 12, 2423–2431Publication Date (Print):June 1, 1989Publication Histo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry of nickel picket fence porphyrin. Electrogeneration and spectral characterization of nickel complexes in unusual oxidation statesK. M. Kadish, D. Sazou, G. B. Maiya, B. C. Han, Y. M. Liu, A. Saoiabi, M. Ferhat, and R. GuilardCite this: Inorg. Chem. 1989, 28,…
A new indole alkaloid glucoside, named palicoside, has been isolated from the leaves of PALICOUREA MARCGRAVII (Rubiaceae) collected in Brazil. The structure was established by spectroscopic methods and its chemical conversion to strictosamide.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolythioamide and poly(1,3,4-thiadiazole) synthesis from dimethyl tetrathioterephthalateIsabelle Delfanne and Guy LevesqueCite this: Macromolecules 1989, 22, 6, 2589–2592Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 Ju…
Compared with wood pulp cellulose, alkaline H2O2-treated wheat straw [suitable for incorporation into baked foods, to reduce caloric density and increase dietary fibre levels] becomes more extensively hydrated, increases more in size when hydrated, and contains a larger glucose accessible internal vol. These and other…
Three different binuclear phthalocyanines were prepared and characterized. Two of the binuclear phthalocyanines are cofacially linked by rigid naphthalene and anthracene spacers, while the third consists of a direct linkage between two phthalocyanine rings. The dicobalt, dicopper, and dizinc derivatives were prepared…
The adsorption of CO2 on clean silver films, oxygen treated silver films and alkali metal predosed silver films has been studied with surface enhanced Raman spectroscopy (SERS) and work function measurements. At 50 K, CO2 was observed to adsorb on vapor deposited silver films with downward vibrational frequency shifts…
The reaction of horseradish peroxidase with alkylhydrazines results in delta-meso-alkylation of the prosthetic heme group and enzyme inactivation (Ator, M. A., David, S. K., and Ortiz de Montellano, P. R. (1987) J. Biol. Chem. 262, 14954-14960). As reported here, enzyme inactivation is associated with the accumulation…
Tri-allylthiourea cadmium chloride (ATCC), an organometallic complex, is a new nonlinear optical material with high second harmonic generation (SHG) effect. Transparant single crystal of 30 × 30 × 25 mm has been grown. Comprehensive studies of crystal growth, structure and general properties have been carried out. The…
Abstract Very good agreement between the observed and the calculated intensities was obtained using the Pearson VII profile shape function. The variable exponent m could be refined only in the damped iterations involving exclusively the profile parameters. Simultaneous refinement of the m with the positional and/or th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVitrified dilute aqueous solutions. 3. Plasticization of water's hydrogen-bonded network and the glass transition temperature's minimumKlaus Hofer, Andreas Hallbrucker, Erwin Mayer, and G. P. JohariCite this: J. Phys. Chem. 1989, 93, 11, 4674–4677Publication Date (Print):Jun…
Grain orientation effects of (NaBi)(l-x)/2Ca x Bi4Ti4O15 (NCBT-100x) ceramics, which belong to a bismuth layer-structured ferroelectric (BLSF) family, are studied using the hot-forging (H.F.) method on the piezoelectric and pyroelectric properties. The dielectric constant ε s is small and almost constant at the wide r…
Abstract Siliconpolymere werden heute weit verbreitet dort eingesetzt, wo hohe Anforderungen an Werkstoffe gestellt werden. Ihr Eigenschaftsprofil – hohe Lebensdauer und große thermische Beständigkeit – hat eine Produktpalette entstehen lassen, die von Ölen über Elastomere bis zu Harzen reicht. Charakteristisches Merk…
Abstract This paper compares the texture of palygorskite after acid leaching with that of the product after extraction silica is removed. These effects were evaluated on the basis of nitrogen adsorption-desorption and mercury penetration porosimetry. Acid leaching at reflux temperature with 2 N HCl resulted in an incr…
The problem of dislocations emitted from a semi-infinite crack in mode II or III loading and blocked by a penetrable barrier (grain boundary), or many such equally spaced barriers, is studied. Analytical solutions for the continuous distribution of dislocations between the crack tip and a barrier is obtained. The case…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMatrix IR spectrum and ab initio SCF calculations of molecular silicon disulfideHansgeorg Schnoeckel and Ralf KoeppeCite this: J. Am. Chem. Soc. 1989, 111, 13, 4583–4586Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 Jun…
The thermal expansion of five cubic zirconias of different yttria content were determined using high-temperature X-ray diffraction. Yttria content was found to have no significant effect on thermal expansion.
Measurement errors often lead to large uncertainties in parameter estimation for dynamical systems. However, a considerable improvement of the preciseness may be obtained by a suitable choice of the experimental conditions. An approach is given to calculate optimal input functions by solving a minimization problem, ba…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the bis(2,9-dimethyl-1,10-phenanthroline)copper(I/II) self exchange reaction in solutionHideo Doine, Yoshiko Yano, and Thomas W. SwaddleCite this: Inorg. Chem. 1989, 28, 12, 2319–2322Publication Date (Print):June 1, 1989Publication History Published online1 May 2…