Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of mono- and diperoxovanadates with peptides containing functionalized side chainsJaswinder S. Jaswal and Alan S. TraceyCite this: J. Am. Chem. Soc. 1993, 115, 13, 5600–5607Publication Date (Print):June 1, 1993Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalytical-scale supercritical fluid extraction of aflatoxin B1 from field-inoculated cornScott L. Taylor, Jerry W. King, John L. Richard, and Judith I. GreerCite this: J. Agric. Food Chem. 1993, 41, 6, 910–913Publication Date (Print):June 1, 1993Publication History Publishe…
In directional solidification of alloys, the interface pattern assumes a cellular structure, with a periodic array of cells, when the velocity is increased beyond the threshold of planar interface instability. A detailed experimental study in the succinonitrile-acetone system has revealed a branch of cellular structur…
Abstract Results of a study of the orientation characteristics of extruded poly(ethylene terephthalate) (PET) (Homopolymer) sheets are discussed with respect to stretching condition. PET exhibits strain‐induced crystallization upon being stretched to large extension ratios. This may lead to strain‐hardening, which is…
BaTiO 3 ceramics doped with La (0.01–0.84 at.%) were prepared only with the addition of La and stoichiometric TiO 2 . As a result, even when BaTiO 3 was doped with 0.53 at.% La, it could be converted to a semiconductor by sintering at 1540°C for 2 h in air and cooled slowly in the furnace. Differential thermal analysi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorocarbon-modified water-soluble cellulose derivativesF. S. Hwang and T. E. Hogen-EschCite this: Macromolecules 1993, 26, 12, 3156–3160Publication Date (Print):June 1, 1993Publication History Published online1 May 2002Published inissue 1 June 1993https://pubs.acs.org/doi/…
The quenching of emission from the cluster-centered (ds/XMCT) excited state of the copper(I) cluster Cu4I4py4 (I, py = pyridine) by tris(β-dionato)chromium(III) complexes CrL3 and several organic substrates has been investigated in dichloromethane solution. The E00 energy of the excited state (I*) was estimated to be…
Abstract The objective this work was to determine the effects of selected polyester catalysts on the reaction of a polyester with epoxy functional polymers. Polyesters containing various catalyst metals were melt blended with either an ethylene‐co‐glycidyl methacrylate or a styrene‐co‐glycidyl methacrylate copolymer.…
Durch anionische Template wie NO und SCN − , aber auch durch H 2 O kann die Verknüpfung von VO‐Polyedern (Oktaedern, Tetraedern, quadratischen Pyramiden) gesteuert werden. Dabei können „Containerverbindungen”︁ mit dem Templat im zentralen Hohlraum, beispielsweise 1 , oder an der Außenwand des Containers entstehen. mag…
Acoustic mode frequency, lattice parameter, and refractive index measurements have been carried out on single crystals of cubic stabilized zirconia, ZrO2(xY2O3), in the temperature range 300 to 1450 K, using Brillouin scattering, x-ray diffraction, and interferometric methods, respectively. Elastic constants Cij and a…
Lead magnesium niobate (Pb(Mg 1/3 Nb 2/3 )O 3 or PMN) exhibits many attractive properties required by actuators for precision submicron control. At room temperature hysteresis is negligible, thermal expansion is less than 1 microstrain degrees C -1 , and the longitudinal strain sensitivity is 375 microstrain at 600 V…
The in situ cutting method to expose bare lithium metal, the corrosion potential‐time transients, and voltammetric measurements have been employed to study the behavior of lithium in various organic electrolyte environments. In situ optical and ex situ scanning electron microscopy techniques were used to examine the m…
Abstract A series of new side‐chain liquid‐crystalline copolymers has been prepared, and the thermal properties of the individual copolymers have been determined. These copolymers are derived from atactic polystyrene and contain both 4‐methoxyazobenzene and 4‐nitroazobenzene mesogens; these are linked through octyl sp…
The cDNA encoding human dCMP deaminase was isolated from a lambda ZAPII expression library using an antibody generated against highly purified HeLa cell dCMP deaminase. The cloned cDNA consists of 1856 base pairs and encodes a protein of 178 amino acids with a calculated molecular mass of 19,985 daltons. The sequence…
This paper reports the development of exciplex-based vapor/liquid visualization systems based on exciplexes formed from tertiary amines and fluorine-substituted benzene and/or toluene. These systems are expected to be virtually coevaporative with solvents (fuels) boiling in the temperature range 70 to 110°C and thus a…
A general life model, valid for any type of insulating material, with or without evidence of an electrical threshold at room temperature, is proposed. The definition of threshold is changed; the behavior of materials is classified as threshold or no-threshold according to the value of applied stresses. The electrical…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structure of [Sb7Ni3(CO)3]3-: a new structural type for nido 10-vertex polyhedral clustersScott Charles, Bryan W. Eichhorn, and Simon G. BottCite this: J. Am. Chem. Soc. 1993, 115, 13, 5837–5838Publication Date (Print):June 1, 1993Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies toward the total synthesis of (+)-ptilomycalin A. Use of a tethered Biginelli condensation for the preparation of an advanced tricyclic intermediateLarry E. Overman and Michael H. RabinowitzCite this: J. Org. Chem. 1993, 58, 12, 3235–3237Publication Date (Print):June…
Abstract The enzyme‐mediator‐conducting polymer model provides a convenient charge transporting immobilization matrix for redox enzymes in potential biosensor constructions. This study considers the charge transport mechanism in the benzoquinone (Q)‐polyaniline (Pani) system. An enhanced current can be obtained on Pan…
A high-pressure single crystal XRD study of KAlSi 3 O 8 with the tetragonal hollandite structure has been completed to 4.47 GPa. The a axis is approximately twice as compressible as c, so c/a increases with pressure. This anisotropy is similar to that of the structurally related mineral stishovite, though hollandite i…