Food and packaging interactions: penetration of fatty food simulants into rigid poly(vinyl chloride)
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Kinetic model of liquid B2O3 gasification in a hydrocarbon combustion environment: I. Heterogeneous surface reactions
Abstract As part of an ongoing program to model hydrocarbon assisted boron combustion, a kinetic model has been developed to describe gasification of the ubiquitous boron oxide coating that inhibits particulate boron ignition. This model includes homogeneous gas phase oxidation reactions, multi‐component gas phase dif…
Highly microporous boron nitride for gas adsorption
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly microporous boron nitride for gas adsorptionTheodore T. Borek, William Ackerman, D. W. Hua, Robert T. Paine, and Douglas M. SmithCite this: Langmuir 1991, 7, 11, 2844–2846Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published…
Substrate and size effects on the coalescence of small particles
Here we present experimental results, using high-resolution electron microscopy and real time video recording, on the liquid-like coalescence of small gold particles supported on silica. We report that particles that are few nanometers in size, and decoupled from substrate interactions, coalesce extremely fast, in fra…
Thermal Diffusivities and Thermal Conductivities of UO2-Gd2O3
Thermal diffusivities of samples of UO2 and UO2 doped with 3, 5, 7 and 10 w/0 Gd2O3 were measured over the temperature range of 298~2,023 K by a laser flash method. Then thermal conductivities were calculated from them. The thermal conductivity decreased with increasing Gd2O3 content at low temperatures, while it was…
N-dimensional diamond, sodalite and rare sphere packings
The diamond, lonsdaleite and sodalite structures are generalized to N dimensions and described. Ring counts and coordination sequences for the N + 1-connected nets are given for N ≤ 6. Simple analytic expressions are given for coordination sequences for diamonds, sodalites and the primitive hypercubic lattice. Replaci…
In situ XANES of an iron porphyrin irreversibly adsorbed on an electrode surface
In illY iron K-edge X-ray Absorption Near Edge Structure, XANES, has been employed to examine the axial coordination of~-oxobis [iron mesotetrakis (methoxyphenyl) porphyrin] (FeTMPFhO, irreversibly adsorbed on a high area carbon substrate, Black Pearl (EP), as a function 0:" the applied potential.Analysis of the XANES…
Experiments on the contact angle between mercury and hardened cement paste
Experiments on the contact angle of mercury with hardened cement paste (HCP) were performed. Circular holes of 150 to 1,050 micrometers in diameter were formed by casting HCP around small diameter wires. The pressure required to intrude the unevacuated, optically measured holes was used to determine a range of upper-b…
The chemistry and free energy of formation of silver nitride
ADVERTISEMENT RETURN TO ISSUEPREVArticleThe chemistry and free energy of formation of silver nitrideEdward S. Shanley and John L. EnnisCite this: Ind. Eng. Chem. Res. 1991, 30, 11, 2503–2506Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991https://p…
The electrochromic effect in cobalt oxide thin films
Communication: Anodic electroprecipitation has been used to deposit thin films of cobalt oxide onto transparent, conducting glass substrates. The electrochromic effect, a reversible color change promoted by an electrochemical reaction, is demonstrated in the films making them of interest, as with WO 3 , V 2 O 5 and ot…
Raman spectra of polymorphs of isotactic polypropylene
Abstract Raman spectra of the α‐, β‐, γ‐ and smectic polymorphs of isotactic polypropylene were recorded at 298 and 16.5 K. At 298 K the spectra of the polymorphs were very similar except in the antisymmetric CH stretching region. However, at 16 K the Raman spectra of the polymorphs show different features in several…
Physical properties of chlorinated liquid crystals
Dielectric, optical and electro-optical properties of four chlorinated nematic liquid crystal compounds and a eutectic mixture were characterized. Some chlorinated liquid crystals are found to exhibit a wide nematic range, modest dielectric and optical anisotropies, low viscosity and small UV absorption. Potential app…
Determination of total and free sulfur dioxide in wine by flow injection analysis and gas-diffusion using p-aminoazobenzene as the colorimetric reagent
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of total and free sulfur dioxide in wine by flow injection analysis and gas-diffusion using p-aminoazobenzene as the colorimetric reagentJordi. Bartroli, Manel. Escalada, Cecilia. Jimenez Jorquera, and Julian. AlonsoCite this: Anal. Chem. 1991, 63, 21, 2532–253…
Surface basicity of mixed oxides: magnesium and zinc aluminates
The surface basicity of magnesium and zinc aluminates has been investigated by adsorption microcalorimetry, using hexafluoro-2-propanol as an acidic probe molecule. The data have been compared to those of the component oxides Al2O3, MgO, and ZnO as well as with two aluminate samples having an excess of bivalent ions w…
Electronic structure of Ba(Sn,Sb)O3: Absence of superconductivity
The electronic structures of ${\mathrm{BaSnO}}_{3}$, ${\mathrm{BaSbO}}_{3}$, and ${\mathrm{BaPbO}}_{3}$, calculated using an extended general-potential linearized augmented-plane-wave method, are reported. The electronic structures of ${\mathrm{BaSnO}}_{3}$ and its 6s analog ${\mathrm{BaPbO}}_{3}$ are found to be very…
Hardness and elastic modulus of zircon as a function of heavy-particle irradiation dose: I.In situα-decay event damage
For a natural single crystal of zircon, ZrSiO4, from Sri Lanka, exhibiting zonation in U and Th contents, the hardness and elastic modulus have been determined as a function of α-decay dose using a mechanical properties microprobe (MPM). The zones vary in thickness from one to hundreds of micrometers, and have uranium…
Thermodynamics of the melting point depression in poly(β-hydroxybutyrate-co-β-hydroxyvalerate) copolymers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of the melting point depression in poly(β-hydroxybutyrate-co-β-hydroxyvalerate) copolymersWilliam J. Orts, Robert H. Marchessault, and Terry L. BluhmCite this: Macromolecules 1991, 24, 24, 6435–6438Publication Date (Print):November 1, 1991Publication History P…
Occurrence of poly-d(â)-3-hydroxyalkanoates in the genusBacillus
A range of Bacillus strains were examined for their ability to accumulate poly-D(-)-3-hydroxyalkanoates (poly-HAKs) which are naturally occurring materials that are optically active, biodegradable thermoplastics. The organisms could produce poly-D(-)-3-hydroxybutyrate (poly-HB) up to 50% of cell dry weight. The conten…
Neoformation of Palygorskite in a Southern New Mexico Aridisol
Abstract Palygorskite is the dominant clay mineral in a petrocalcic horizon of the Rotura soil series (a coarse‐loamy, mixed, thermic, Typic Haplargid), a soil of middle Pleistocene age in southern New Mexico. The purpose of this study was to determine if palygorskite is eolian in origin, inherited from its alluvial p…
Diffusion of a symmetric block copolymer in a periodic potential
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiffusion of a symmetric block copolymer in a periodic potentialJean Louis Barrat and Glenn H. FredricksonCite this: Macromolecules 1991, 24, 24, 6378–6383Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991…