Materials Literature
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3-Carboxy-cis,cis-muconate lactonizing enzyme (CMLE; EC 5.5.1.5) from Neurospora crassa catalyzes the reversible gamma-lactonization of 3-carboxy-cis,cis-muconate by a syn-1,2 addition-elimination reaction. The stereochemical and regiochemical course of the reaction is (i) opposite that of CMLE from Pseudomonas putida…
Thermal decomposition behaviour of single and mixed blowing agents formulations based on azodicarbonamide (ADC) were investigated. It was shown that the addition of an auxiliary blowing agent 4,4'oxybisbenzenesulfonylhydrazide (OBSH) with decomposition behaviour complimentary to the main blowing agent (activated ADC)…
Abstract Pr(CH 3 COO) 3 entsteht beim Entwässern von Pr(CH 3 COO) 3 · 1,5 H 2 O bei 180°C als amorphes Pulver. Einkristalle konnten daraus mit Hilfe von (NH 4 )CH 3 COO als „Mineralisator”︁ ebenfalls bei 180°C in einer geschlossenen Glasampulle gezüchtet werden. Die Kristallstruktur (tetragonal, P 4 2 1 c (Nr. 114), Z…
Corrosion behavior of three aluminum-lithium (Al-Li) alloys was investigated in aerated 0.5 M sodium sulfate (Na2SO4), deaerated 3.5% sodium chloride (NaCI), and aerated 3.5% NaCI. Corrosion behavior of the Aluminum Association (AA) alloys 2090-T8E41 (UNS A92090, sheet), AA 8090-T851 (UNS A98090, sheet), and AA 8090-T…
Abstract Increasing and constant temperature gravimetric methods were used to measure the thermal decomposition rates of Mg(OH) 2 particles. An Arrhenius‐type kinetic equation was proposed and tested. Temperature, exposure time on surface area of the calcined particles and other effects of variables were explored. A f…
Al-Zr alloy thin films are prepared via alternate sputtering deposition. The as prepared films exhibit metastable phases including amorphous, cubic ZrAl3(L12), supersaturated Al-in-Zr close-packed hexagonal structures, and Zr-in-Al face-centered cubic solid solutions with uniform composition distribution. The amorphou…
A study of thread tensions on a lockstitch sewing machine was made, measuring simultaneously both the needle and bobbin thread tensions. Experiments were carried out under specified sewing conditions, whereby needle and bobbin thread tensioner adjustment, sewing speed, number of plies, fabric quality and sewing thread…
Abstract After a general introduction including definition of biodegradability, the recent literature is briefly summarized. The results obtained in our laboratory for various polymers in three different composting units are then presented. They demonstrate that there is an urgent need for a quantitative method to cha…
Slow strain rate tests (SSRT) were conducted in solutions of hydrochloric acid (HCl) + sodium chloride (NaCl) at ambient temperature on type 304 (UNS S30400) stainless steel (SS) weldments that exhibited a duplex ferrite-austenite structure in the weld fusion zone. Results indicated the weld fusion zone corroded prefe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid Crystalline Fluorocarbon Side-Chain PolyestersL. M. Wilson and A. C. GriffinCite this: Macromolecules 1994, 27, 7, 1928–1931Publication Date (Print):March 1, 1994Publication History Published online1 May 2002Published inissue 1 March 1994https://pubs.acs.org/doi/10.10…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Structure of the Oxygen-Deficient Perovskite YBaCuFeO5+.delta.Alvaro W. Mombru, Christos Christides, Alexandros Lappas, Kosmas Prassides, M. Pissas, C. Mitros, and D. NiarchosCite this: Inorg. Chem. 1994, 33, 7, 1255–1258Publication Date (Print):March 1, 1994Publica…
An optimised set of thermodynamic functions consistent with the phase diagram was derived for the Fe-Nb system from information on phase equilibria and thermodynamic data available in the literature. The thermodynamic properties of the intermediate e (Fe 2 Nb) phase were described using the sublattice model. A Redlich…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Laser-Induced Fluorescence Study of OH Desorption from Pt in H2O/O2 and H2O/H2 MixturesErik Fridell, Arne Rosen, and Bengt KasemoCite this: Langmuir 1994, 10, 3, 699–708Publication Date (Print):March 1, 1994Publication History Published online1 May 2002Published inissue 1…
RATIONALE AND OBJECTIVES: A prior study indicated that differences in the x-ray linear attenuation coefficients of cancerous and normal breast tissues tend to increase as the energy of the incident beam decreases. The authors investigated x-ray energies down to 20 keV. In the current study, the linear attenuation coef…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLayer Structure.1.Poly(phenylene-terephthalamide)s Derived from Mono-, Di-, and Tetrakis(alkylthio)terephthalic AcidsHans R. Kricheldorf and Angelika DomschkeCite this: Macromolecules 1994, 27, 6, 1509–1516Publication Date (Print):March 1, 1994Publication History Published o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermochromism of Specific Crystal Form Oxotitanium Phthalocyanines Studied by Electroabsorption and X-ray Diffraction MeasurementsToshiro Saito, Yasushi Iwakabe, Toshiyuki Kobayashi, Shigeo Suzuki, and Takao IwayanagiCite this: J. Phys. Chem. 1994, 98, 11, 2726–2728Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplexation of Poly(vinyl alcohol)-Congo Red Aqueous Solutions. 1. Viscosity Behavior and Gelation MechanismMitsuhiro Shibayama, Fumiyoshi Ikkai, Ryuji Moriwaki, and Shunji NomuraCite this: Macromolecules 1994, 27, 7, 1738–1743Publication Date (Print):March 1, 1994Publicati…
Departments of Anesthesiology, F. Edward Herbert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, and Walter Reed Army Medical Center, Washington, DC Address correspondence and reprint requests to Steven M. Karan, MD, Uniformed Services University, Department of Anesthesiol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAir activated organotin catalysts for silicone curing and polyurethane preparationBernard Jousseaume, Nicolas Noiret, Michel Pereyre, Annie Saux, and Jean Marc FrancesCite this: Organometallics 1994, 13, 3, 1034–1038Publication Date (Print):March 1, 1994Publication History P…
Abstract Two kinds of oxygen-deficient phases around LaNiO2.5 were obtained by a low-temperature H2 reduction of perovskite-type LaNiO3. An antiferromagnetic LaNiO2.5 with TN 140 K seems to be stoichiometric and a small amount of excess oxygen leads to a new ferromagnetic phases. A structural refinement has revealed t…