Materials Literature
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A method of computing the electrostatic potential and electron trajectories in electron guns of the electron microscope type is described. Potentials are computed digitally using the successive over-relaxation technique, using two different mesh sizes. Electron trajectories are computed by a predictor-corrector method…
Three methods to calculate the current distribution, both in magnitude and phase, throughout the cross section of a single-turn coil are presented. The methods are analytical for computer computations in that exact solutions would be obtained if round-off errors could be avoided completely. The numerical procedure, wh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExistence of HMgX compoundsEugene C. Ashby, R. A. Kovar, and K. KawakamiCite this: Inorg. Chem. 1970, 9, 2, 317–324Publication Date (Print):February 1, 1970Publication History Published online1 May 2002Published inissue 1 February 1970https://pubs.acs.org/doi/10.1021/ic50084…
A description is given of an electron energy analyser, which consists of two wienfilters, for measuring electron energy losses in solids. One wienfilter serves as a compensator-corrector for the other. This means that the resolution of the analyser is not affected by the instabilities of the power supplies, and no ene…
Abstract The formation constants of chromium (III) complexes with iminodiacetic acid (IDA) and l-aspartic acid (Asp) as the terdentate ligands were determined by the pH method in the ionic strength, μ=0.1 and at 25°C: their values were logk1=10.9 and logk2=10.5 for IDA and logk1=10.1 and logk2=9.5 for Asp, respectivel…
Minoru Tanaka, Gentaro Yamaguchi, Jiro Shiokawa, Chiyoe Yamanaka; Mechanism and Rate of the Intramolecular Energy Transfer in Rare Earth Chelates, Bulletin
Cellulose decrystallized by swelling in liquid ammonia produced a simpler thermogravimetric analysis curve than obtained from ordinary cellulose—presumably because of a decrease in the intermolecular char-forming reactions. By using a graphical procedure which permits a linear plot of the thermogram, it was possible t…
The decomposition of Cu(OH)2 on electron irradiation and thermal treatment has been investigated by X-ray diffraction, thermo-analytical and electron microscopic methods. A sudden, reversible elongation of the c axis of Cu(OH)2 at about 50°C has been found and the topotactic relation between Cu(OH)2, CuO and Cu2O esta…
During pyrolysis of pure cellulose, the Crystallinity Index (Crl) remained fairly constant over more than 50% weight loss before dropping rapidly as the X-ray pattern deteriorated. With samples first treated with trace quantities of inorganic salts, heating first increased the Crl—the results implying a preferentially…
Densification of MgO with LiF additions depends on the formation of a liquid that is initially a lubricant for rearrangement of particles and later a material transport medium for pressure–enhanced liquid–phase sintering. The rate–controlling process in the latter stage is viscous flow of the liquid through grain–boun…
Abstract Feinteiliger Anatas wurde mit NaF‐Lösungen umgesetzt. Dabei werden OH‐Gruppen der TiO 2 ‐Oberfläche durch F − ersetzt. In ungepufferter Lösung oder bei pH‐Werten am oder wenig über dem isoelektrischen Punkt (pH 6,6) wird nur die Hälfte der vorhandenen OH‐Gruppen. Zugleich tauschen die übrigen, sauren OH‐Grupp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible intramolecular photodimerization of 1,3-bis(.alpha.-naphthyl)propaneEdwin A. Chandross and Carol J. DempsterCite this: J. Am. Chem. Soc. 1970, 92, 3, 703–704Publication Date (Print):February 1, 1970Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMoessbauer and far-infrared studies of tetrahaloferrate anions of the type FeCl4-nBrn-C. A. Clausen III and Mary L. GoodCite this: Inorg. Chem. 1970, 9, 2, 220–223Publication Date (Print):February 1, 1970Publication History Published online1 May 2002Published inissue 1 Febru…
Abstract The widths at half‐value of high‐resolution NMR spectra of bound water of cellulose were studied in relation to the temperature change. Two points were made clear: First, the amount of bound water of the cellulose sample can be pointed out with higher accuracy the lower the temperature of the measurement. Sec…
Measurements are reported for the thermal conductivity, λ(80° to 400°K), electrical resistivity, ρ(4.2° to 400°K), and absolute Seebeck coefficient, Q(6° to 400°K), of pressed and sintered uranium mononitride. The measurements between 77° and 400°K were made using an absolute longitudinal heat flow apparatus. These da…
Abstract In a study aimed at process optimization of caprolactam polymerization, particular reference has been paid to the competing role of water in caprolactam hydrolysis and endgroup polycondensation. The dependence of the apparent equilibrium constant for polycondensation on water concentration indicated that ther…
Thin films of amorphous (stoichiometric) GeTe have been examined by direct recording of electron diffraction, and intensity profiles across the diffuse diffraction pattern have been recorded with electrostatic rejection of inelastically scattered electrons. Radial distribution analysis of these curves shows that the l…
Abstract Isotactic polypropylene hot‐pressed film was subjected to uniaxial and biaxial stretching. The orientation behavior was investigated by means of x‐ray pole figure technique, birefringence, electron microscope, and tensile tester. From the x‐ray pole figure results it was confirmed that three kinds of crystal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExcimer fluorescence and dimer phosphorescence from a naphthalene sandwich pairEdwin A. Chandross and Carol J. DempsterCite this: J. Am. Chem. Soc. 1970, 92, 3, 704–706Publication Date (Print):February 1, 1970Publication History Published online1 May 2002Published inissue 1…
Abstract Differential thermal analysis of mixtures of poly(vinyl chloride) and dioctyl phthalate shows a compound endothermic peak due to decomposition of both polymer and plasticizer. The thermal behavior of other plasticizers is similarly affected in the presence of poly(vinyl chloride). The addition of zinc oxide o…