Materials Literature
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Abstract The Raman spectra of a series of WO 3 AI 2 O 3 catalysts containing 1‐30 wt‐% of WO 3 were investigated with respect to the effect of O 2 calcination and H 2 OD 2 O exposure. These studies showed that the frequencies of bands due to surface tungstate species can be shifted reversibly by as much as 6% of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHost-guest complexation. 31. A transacylase partial mimicDonald J. Cram, Howard Edan Katz, and Ira B. DickerCite this: J. Am. Chem. Soc. 1984, 106, 17, 4987–5000Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 19…
Large-facetted monocrystals of blue phase I are grown and observed in coexistence with the isotropic liquid. Observations of this three-dimensional polyhedral habit, combined with a conjecture that facets perpendicular to screw axes are absent, are compatible with the $I({4}_{1}32)$ space group for blue phase I. The (…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of carbon dioxide on titanium dioxide and platinum/titanium dioxide studied by x-ray photoelectron spectroscopy and Auger electron spectroscopyKatsumi Tanaka, K. Miyahara, and I. ToyoshimaCite this: J. Phys. Chem. 1984, 88, 16, 3504–3508Publication Date (Print):Au…
Single-crystal time-of-flight neutron diffraction techniques have been applied to the analysis of oxygen behavior in the structure of yttria-stabilized cubic zirconia, Zr(Y)O/sub 1.862/. Reflection data were collected at room temperature, at 1040 K, and at 1040 K with a 7.8 DC voltage across the (100) and (100) crysta…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolybdenum(VI)-dioxo complexes with sterically bulky ligandsP. Subramanian, J. T. Spence, R. Ortega, and J. H. EnemarkCite this: Inorg. Chem. 1984, 23, 17, 2564–2572Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 Augus…
▪ Abstract The phase-field method has recently emerged as a powerful computational approach to modeling and predicting mesoscale morphological and microstructure evolution in materials. It describes a microstructure using a set of conserved and ...Read More
The Xe $5s$, $5p$ photoelectron satellite spectrum has been studied in the photon-energy range from 28 to 75 eV with the aid of synchrotron radiation. This range includes the Xe $5s$ Cooper minimum, and the cross sections and angular distribution data demonstrate the importance of the strong two-electron channels in t…
The mesogenic properties of four series of compounds with the iso;hiocyanate terminal group are compared, viz.: 4-n-alkyl-4′-isothiocyanatobiphenyls /1/, 4–/trans-4′-n-alkylcyclohexyl/benzeneisothiocyanates /2/, isothiocyanatophenyl 4-n-alkylbenzoates /3 / and isothiocyanatophenyl 4-/trans-4′-n-alkylcyclohexyl/benzoat…
Two kinds of experiments, sporulation and growth experiments, were carried out to demonstrate the effect of cadmium on aquatic hyphomycetes. Oak (Quercus petraea L.) leaves were exposed in a hard-water stream (Lüssel, Swiss Jura) and a soft-water stream (Ibach, Black Forest) for 2 months. In the laboratory, fungal spo…
An experimental program on stress corrosion cracking (SCC) aimed at the development of a quantitative model for predicting the behavior of Inconel 600 tubing in high temperature water is currently underway at Brookhaven National Laboratory (BNL). Empirical data are gathered to relate factors that influence SCC. Work i…
The instrumental optimization conditions for most small-angle scattering experiments in which the data are azimuthally symmetric require that the scattered flight path be equal to the incident flight path. This is in contrast to a recent analysis which shows that under some conditions the incident and scattered flight…
Abstract The solid state morphology of chlorinated polyethylene (CPE)‐modified poly(vinyl chloride) (PVC) and the relationship of blend structure to impact strength and mode of fracture have been investigated. Selective staining of the CPE phase showed that the morphology of the two phase system changes with increasin…
Poly-beta-hydroxybutyrate (PHB) accumulates in individual cells of Alcaligenes eutrophus in the form of refractile bodies which alter the light-scattering properties of individual cells. Flow cytometry has been applied to measure the distributions of single-cell light-scattering intensity in Alc. eutrophus populations…
Electrochemical methods have been proposed as a nondestructive, quantitative means for determining the degree of sensitization associated with the chromium-depleted zones surrounding precipitates of chromium carbides in stainless steels. The use of one such method, the electrochemical potentiokinetic reactivation (EPR…
Uniaxially pressed pellets of cordierite‐type glass powders were sintered in air at 800°, 820°, 840°, and 860°C. There was pronounced anisotropy of shrinkage for these pellets composed of nonspherical crushed glass particles, and the initial axial shrinkage rate was one‐half that of the diameter, as though axial parti…
The sintering behavior of powder compacts formed from spherical, nearly monosized SiO 2 particles was investigated. Highly ordered compacts sintered to high density and translucency at 1000°C. In contrast, less homogeneous samples prepared from flocculated suspensions remained highly porous after sintering under the s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLanthanide 4f .fwdarw. 4f electric dipole intensity theoryMichael F. Reid and F. S. RichardsonCite this: J. Phys. Chem. 1984, 88, 16, 3579–3586Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984https://pubs.acs…
Mo2(gly)4]Cl4.«H20,8 [Cr2(gly)4]X4-nH20 (X = Cl, Br),9 and [Rh2(0-ala)4] (C104)4-2H20.10One known exception to this "right, right, left, left" order is the compound [Mo2(gly)4]- (S04)2-4H20,'1 in which the order is "right, left, right, Left".It is notable that this compound is obtained by dissolution of the chloride s…
The pH of the solution from which the gel is precipitated determines the calcined zirconia crystal phase. Monoclinic zirconia is produced from materials precipitated in the 6.5 to 10.4 pH range; the tetragonal precursor is obtained for the 3 to 4 or 13 to 14 pH range. The calcination atmosphere, temperature history du…