Materials Literature
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Abstract Thermal diffusivity D of filler‐polyimide composites was investigated using flash radiometry. The fillers used were: diamond, alumina, boron nitride, aluminium nitride, silicon carbide, and silicon carbide whiskers, Composite films were prepared by casting a polyamic acid solution with dispersed filler on a g…
Abstract The effect of electrolyte concentration, exchangeable sodium percentage (ESP), sodium adsorption ratio (SAR), and pH on the flocculation-dispersion behavior of 50/50 mixtures of reference illite with reference kaolinite or reference montmorillonite was investigated. The clays were Na- or Ca-saturated and free…
This is the second of two papers describing the method and application of numerical modeling of the galvanic corrosion problem. The first paper4 derived the partial differential equation and boundary conditions governing this phenomenon. This paper describes the formulation of the finite-element method to solve that b…
The temperature variation of the thermal conductivity of six samples of pitch-derived carbon fibers has been measured in the temperature range 3T300 K. The lattice thermal conductivity has been fitted, with boundary and point-defect scattering for the phonons taken into consideration. It is shown that the in-plane coh…
Abstract The extent of illite/smectite (I/S) reactions is linked with quantitative measurements of shale fabric in a suite of samples from a lower Frio Formation well. Greater illitization of the I/S clays is found in laminated shales that possess a larger pore surface area/pore volume (SA/V) of 3.21 × 10 6 cm −1 than…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(hydroxybutyrate) in vivo: NMR and x-ray characterization of the elastomeric stateStuart R. Amor, Trevor Rayment, and Jeremy K. M. SandersCite this: Macromolecules 1991, 24, 16, 4583–4588Publication Date (Print):August 1, 1991Publication History Published online1 May 200…
This article reviews published data on the mechanical properties of additively manufactured metallic materials. The additive manufacturing techniques utilized to generate samples covered in this review include powder bed fusion (e.g., EBM, SLM, DMLS) and ...Read More
Adult pig smooth muscle cells (SMC) were isolated from the aortic media by collagenase digestion, subcultured as monolayer, and then re-integrated into a three-dimensional network of type I collagen. The contractile state characteristic for resident arterial wall SMC changed to the synthetic, fibroblast-like state. Th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCluster of clusters. Structure of a new cluster [(p-Tol3P)10Au13Ag12Cl7](SbF6)2 containing a nearly staggered-eclipsed-staggered metal configuration and five doubly-bridging ligandsBoon K. Teo and Hong ZhangCite this: Inorg. Chem. 1991, 30, 16, 3115–3116Publication Date (Pri…
The director-field configuration of a nematic liquid crystal confined to cylindrical cavities of polycarbonate Nuclepore membranes ranging from 0.3 to 0.05 \ensuremath{\mu}m in radius is determined using deuterium nuclear magnetic resonance ${(}^{2}$H NMR). Spectral patterns from cavities of radius 0.3 \ensuremath{\mu…
Corrosion rates to be expected on carbon steel in oil and gas production are often estimated using the De Waard and Milliams equation, which is based on experimental corrosion data obtained in CO2-containing saline water only, in the absence of liquid hydrocarbons (crude or gas condensate). Under certain conditions, l…
Abstract While consideration of the crystalline domains have long dominated research in understanding the properties of semicrystalline polymers, a satisfactory understanding of crack growth in these materials can only be realized by developing corresponding analytical tools to characterize the amorphous region. Since…
Tungsten oxide gels were prepared by a sol-gel process from a tungsten ethoxide/ethanol/water solution (sol). Tungstic hydrates were observed in high-viscosity sol by Raman spectroscopy. As the sol is reduced to the gel, Raman bands ascribed to amorphous tungsten oxide appeared. The result of the Raman measurement sho…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymer brush at high coveragePik Yin Lai and Avi HalperinCite this: Macromolecules 1991, 24, 17, 4981–4982Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published inissue 1 August 1991https://pubs.acs.org/doi/10.1021/ma00017a040https://…
Highly oriented pyrolytic graphite (HOPG) has been studied by several groups as an electrode material, due mainly to its well‐defined surface structure compared to more commonly used materials such as glassy carbon. The basal plane of HOPG is also a common standard for scanning tunneling microscopy because it is atomi…
The reductive chemistry of a series of progressively more saturated Ni(II) porphyrins, derived from anhydromesorhodochlorin XV methyl ester, has been examined as models of F430. Cyclic voltammetry, spectroelectrochemistry, electron paramagnetic resonance, and X-ray absorption studies are used to characterize the paren…
Southern blot analysis indicated that the gene encoding the constitutive, NADP-linked bile acid 7 alpha-hydroxysteroid dehydrogenase of Eubacterium sp. strain VPI 12708 was located on a 6.5-kb EcoRI fragment of the chromosomal DNA. This fragment was cloned into bacteriophage lambda gt11, and a 2.9-kb piece of this ins…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid-crystalline polymers containing mesogenic units based on half-disk and rodlike moieties. 5. Side-chain liquid-crystalline poly(methylsiloxanes) containing hemiphasmidic mesogens based on 4-[[3,4,5,-tris(alkan-1-yloxy)benzoyl]oxy]-4'-[[p-(propan-1-yloxy)benzoyl]oxy]bip…
Abstract Pierre shale samples from a thin stratigraphic zone within the contact aureole of the lamprophyric Waisen dike record changes due to thermal effects that are not influenced by detrital differences. Analyses of fixed-NH 4 , mineralogy, and Rock-Eval pyrolysis indicators of organic matter maturity provide new i…
Simultaneous application of colloidal processing and liquid‐forming additives to alumina resulted in a sintered density of >99% in 1 h at a temperature as low as 1070°C for a commercial high‐purity alumina powder at a total dopant level of 2 mol%. The additives were 0.9% CuO + 0.9% TiO 2 + 0.1% B 2 O 3 + 0.1% MgO.…