Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical and spectral characterization of the monomer-dimer equilibrium involving (meso-tetrakis(1-methylpyridinium-4-yl)porphinato)nickel(II) in dimethylformamideK. M. Kadish, D. Sazou, Y. M. Liu, A. Saoiabi, M. Ferhat, and R. GuilardCite this: Inorg. Chem. 1988, 27,…
A two‐dimensional mathematical model is presented for a lead dioxide electrode in a lead‐acid cell. It is used to simulate the time dependent behavior of the electrode during discharge. The model contains six dependent variables: the concentration of the acid electrolyte, the porosity, the electrical potentials of the…
The effect of nitrogen as a solid solution strengthening element in steel is well known, but is also generally associated with embrittlement. The present work describes the nitrogenation of nitrogen alloy stainless steel wire to produce material of high nitrogen content, which is shown to have beneficial effects on st…
The ligand PTP (3,6-bis(2-pyridylthio)pyridazine) generates both hydroxo- and halogeno-bridged, square-pyramidal, binuclear copper(II) complexes ([Cu 2 (PTP)X 4 ] (X = Cl (I), Br (II)); [Cu 2 (PTP)(OH)X 3 ] (X = Cl (IV), Br (V)), which are antiferromagnetically coupled. The hydroxo-bridged derivatives are more strongl…
Depending on the culture conditions, Pyrodictium occultum cells revealed two different types of fibers with significant differences in their width in the electron microscope. During growth on elemental sulfur preferentially fibres with a diameter of about 23 nm (type I) were produced. When elemental sulfur was substit…
Baileychlore occurs as dark green rims on colloform calcite veins within a strongly oxidized collapse karst-breccia containing altered andesite and garnet-vesuvianite skarn clasts at the Red Dome deposit near Chillagoe, Queensland, Australia. Baileychlore is a new Zn-rich chlorite. The ZnO contents are fairly uniform…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltrasonic PTC modification of poly(vinylidene fluoride) surfaces and their characterizationMarek W. Urban and Evelisse M. Salazar-RojasCite this: Macromolecules 1988, 21, 2, 372–378Publication Date (Print):February 1, 1988Publication History Published online1 May 2002Publis…
In vitro mutagenesis techniques have been used to investigate two structure-function questions relating to the allosteric citrate synthase of Escherichia coli. The first question concerns the binding site of alpha-keto-glutarate, which is a structural analogue of the substrate oxaloacetate and yet has been suggested t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray absorption study of octafluorodirhenate(III): EXAFS structures and resonance Raman spectroscopy of octahalodirhenatesSteven D. Conradson, Alfred P. Sattelberger, and William H. WoodruffCite this: J. Am. Chem. Soc. 1988, 110, 4, 1309–1311Publication Date (Print):Februar…
The effects of dissolved impurities in simulated boiler water reactor (BWR) water on the intergranular stress corrosion cracking (IGSCC) of sensitized stainless steels (SSs) were studied by constant elongation rate tensile (CERT) tests with notched specimens. Impurities studied were sulfate, nitrate, chloride, and chl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnidentate vs bidentate acyl coordination: reactions of high-spin iron(II) alkyls with carbon monoxide and the crystal structure of the bidentate acyl Fe(.eta.2-COC6H2Me3)Br(CO)(dippe)Ann R. Hermes and Gregory S. GirolamiCite this: Organometallics 1988, 7, 2, 394–401Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of cross-links which occur during continuous chemical stress-relaxationKenneth T. GillenCite this: Macromolecules 1988, 21, 2, 442–446Publication Date (Print):February 1, 1988Publication History Published online1 May 2002Published inissue 1 February 1988https://pubs.a…
Abstract δ Valerolactone and ϵ‐caprolactone were reacted with BBr 3 , AIBr 3 , TiBr 4 , SnBr 4 or Bu 2 SnBr 2 in dichloromethane or chloroform in a 1 : 1 mole ratio. When these exothermic reactions were conducted with cooling, complexation of the lactones at the exocyclic oxygen was detectable by means of IR and 1 H N…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron density studies of porphyrins and phthalocyanines. 7. Electronic ground state of bis(pyridine)(meso-tetraphenylporphinato)iron(II)Naiyin Li, Philip Coppens, and John LandrumCite this: Inorg. Chem. 1988, 27, 3, 482–488Publication Date (Print):February 1, 1988Publicat…
A study has been made of interfacial layers that form within cracks in mica and silicate glass. The layers are the result of interactions with environmental species behind the crack tip. Deposition processes are associated with precipitation from aqueous solutions and corrosion of the crack walls. The level of precipi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the unfolding of collapsed polystyrene chains above the glass transition temperatureChun Yuan Liu and Herbert MorawetzCite this: Macromolecules 1988, 21, 2, 515–518Publication Date (Print):February 1, 1988Publication History Published online1 May 2002Published in…
Abstract The double bonds of natural rubber latex (stabilized by a nonionic surfactant) were reacted with an approximately equimolar amount of performic acid at room temperature with a limited amount of formic acid present. Product analysis by 1 H‐NMR during the course of the reaction showed that 69–90% epoxidation oc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon-functionalized silyl enol ethers. Part 2. Silyl enol ethers bearing stereogenic silicon atoms and chiral alkoxy groups: the effect of these groups upon the facial selectivity of the epoxidation of an enol double bondRobert D. Walkup and Nihal U. ObeyesekereCite this:…
Japanese nickel titanium (NiTi) alloy wire possesses excellent spring-back properties, shape memory and super-elasticity. In order to adapt this wire to clinical use, it is necessary to bend as well as to control its super-elastic force, and so a direct electric resistance heat treatment (DERHT) method was developed.…
Corrosion fatigue is considered to be one of the most important factors in determining the life of static offshore structures such as platforms for oil and gas production; the combination of corrosive environment and cyclic stress can produce failure of metals by the development and growth of cracks. Seawater provides…