Materials Literature
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High shear stress appears to decrease wall thickening in diseased arteries and vascular grafts. To determine if increased shear stress diminishes smooth muscle (SMC) proliferation, we studied the effect of increased blood flow on neointimal thickening in porous polytetrafluoroethylene grafts implanted in baboons. An a…
Not a simple tetradentate, but rather a bis(bidentate) coordination is revealed for L (L = bis[1-methyl-2(6-methyl-2-pyridyl)benzoimidizol-5-yl]methane) and is attributed to the inflexibility of its aromatic rings. In its reaction with cobalt(II) perchlorate an orange salt is produced, in which the three ligands wind…
Photostimulable x-ray-storage phosphors in the form of image plates are one of the most important applications of defect centers in ionic crystals. Understanding the underlying mechanism, apart from its practical relevance, creates additional insights into the generation and kinematics of radiation defects in this cla…
NAD(+)-dependent isocitrate dehydrogenase from Saccharomyces cerevisiae is composed of two nonidentical subunits, designated IDH1 (Mr approximately 40,000) and IDH2 (Mr approximately 39,000). We have isolated and characterized a yeast genomic clone containing the IDH2 gene. The amino acid sequence deduced from the gen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolynitro-substituted strained-ring compounds. 2. 1,2-DinitrospiropentanesPeter A. Wade, Paul A. Kondracki, and Patrick J. CarrollCite this: J. Am. Chem. Soc. 1991, 113, 23, 8807–8811Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Publi…
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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…
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…
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 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…
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 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 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…
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…
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…
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…
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…
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…
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…
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…