Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Characterization of Some Derivatives of Poly(ethylenimine)Timothy W. Johnson and Irving M. KlotzCite this: Macromolecules 1974, 7, 2, 149–153Publication Date (Print):March 1, 1974Publication History Published online1 May 2002Published inissue 1 March 1974http…
Edge- and screw-dislocation velocities in ``pure'' MgO single crystals have been measured as a function of stress, temperature, and valence state of the iron impurities in order to identify the rate-controlling drag mechanism for dislocation mobility. Edge dislocations have been observed to move faster than screw disl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAmmonia Formation in the Catalytic Reduction of Nitric Oxide. III. The Role of Water Gas Shift, Reduction by Hydrocarbons, and Steam ReformingM. Shelef and H. S. GandhiCite this: Ind. Eng. Chem. Prod. Res. Dev. 1974, 13, 1, 80–85Publication Date (Print):March 1, 1974Publicat…
A recently described technique for direct least-squares refinement of phases has been successfully applied to the problem of phasing a 1.5 Å data set of observed structure-factor magnitudes for C. pasteurianum rubredoxin (M.W. ≃ 6100), given as a starting point a set of phases to 2.5 Å resolution as determined from he…
Abstract Many commercial elastomers exhibit good solvent resistance and high temperature stability but have limited use at low temperature. Fluorosilicone, which exhibits good low temperature properties, is limited in many dynamic applications by its poor physical strength. Phosphonitrilic fluoroelastomers are being d…
Abstract The Raman spectra of SbSBr, BiSI, SbSeI, and BiSeI are investigated and compared with those of SbSI. Following the analysis of each observed mode from one substituted compound to another, a set of normal mode functions is proposed to account for the overall spectral feature of these compounds. The results are…
Abstract Glassy, amorphous thermoplastics experience a nearly universal susceptibility to crack and craze formation in the combined presence of stress and a chemical environment. This susceptibility has been evaluated for styrene‐acrylonitrile copolymers according to the factors which effect craze initiation and those…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and luminescence of the tris(2,2'-bipyridine)iridium(III) ionC. M. Flynn Jr. and J. N. DemasCite this: J. Am. Chem. Soc. 1974, 96, 6, 1959–1960Publication Date (Print):March 1, 1974Publication History Published online1 May 2002Published inissue 1 March 1974https://…
Photoinduced O− ions or V-type centers have been detected in ZnO following ultraviolet irradiation at −196°C. The EPR spectrum of the ions is characterized by g⊥=2.021 and g∥ = 2.0026. The concentration of O− was greatly enhanced when N2O had been adsorbed on the surface prior to irradiation. No oxygen-17 hyperfine st…
A mutant cell strain derived from a Chinese hamster line by mutagenesis with ethylmethane sulfonate requires glycine for growth. In the wild type, glycine synthesis is catalyzed by serine hydroxymethyltransferase (EC 2.1.2.1). Cell fractionation by differential centrifugation and isopycnic sucrose gradient analysis re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCovalency effects on the ligand field splittings of octahedral 5f7 compoundsN. Edelstein, D. Brown, and B. WhittakerCite this: Inorg. Chem. 1974, 13, 3, 563–567Publication Date (Print):March 1, 1974Publication History Published online1 May 2002Published inissue 1 March 1974h…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicroporous Polymeric FilmsHarvey S. Bierenbaum, Robert B. Isaacson, Melvin L. Druin, and Steven G. PlovanCite this: Ind. Eng. Chem. Prod. Res. Dev. 1974, 13, 1, 2–9Publication Date (Print):March 1, 1974Publication History Published online1 May 2002Published inissue 1 March…
Abstract— Carotenoid pigments were extracted and purified from wild‐type and mutants 7 and 93a of Sarcina lutea , and tested for their ability to quench 1 O 2 . The wild‐type pigment (P‐438, 9 conjugated double bonds) is as active in quenching 1 O 2 as is β‐carotene. On the other hand, the pigment P‐422 (8 conjugated…
Abstract By X‐ray diffraction and by density measurements as well as by differential scanning calorimetry, the crystallization phenomena of 6‐polyamide(nylon‐6) samples, obtained under different conditions were investigated. Particularly we have analyzed a method for the quantitative determination of the α, γ, and δ (…
Because of the resistance of iron-chromium stainless steels to chloride stress corrosion, this alloy system was used as a base for developing superior resistance to various forms of corrosion by means of alloying with molybdenum, nickel, and the six metals of the platinum group. The effects of these alloying elements…
A method to study the diffraction of an electromagnetic plane wave by a grating,in the case where it has a finite conductivity, is described for both classical cases of polarization. The results relative to the visible and ultra-violet regions are compared to those recently obtained using an integral formalism [1],[2]…
Measurements of the miscibility gaps in the Li 2 O‐ and Na 2 O‐SiO 2 binaries are reported and compared to data of other workers. Heat treatments by brief immersion in liquid Sn were used for measuring the properties of glasses with a strong devitrification tendency. The miscibility‐gap boundaries of both systems are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of dithiolene complexes with amines. I. Adducts of iron and cobalt complexesIan G. Dance and Thomas R. MillerCite this: Inorg. Chem. 1974, 13, 3, 525–535Publication Date (Print):March 1, 1974Publication History Published online1 May 2002Published inissue 1 March 19…
The crystal structure of the title compound, obtained as a coating from a lime kiln, has been shown to be isostructural with that of the mineral silicocarnotite and refined by full-matrix least-squares methods (570 independent diffractometer reflections). The lattice parameters of the latter compound were used to init…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of the 10.pi. electron cyclooctatetraene dianion in potassium diglyme 1,3,5,7-tetramethylcyclooctatetraene dianion, [K((CH3OCH2CH2)2O)]2[C8H4(CH3)4]Stephen Z. Goldberg, Kenneth N. Raymond, C. A. Harmon, and David H. TempletonCite this: J. Am. Chem. Soc. 1974, 96, 5…