Materials Literature
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Abstract Samples of mixed-layer illite/smectite were investigated from a single bentonite bed zoned with respect to expandability from 90 to 30%. Chips of natural rocks were embedded in a resin, using a procedure designed to preserve the original fabric, cut with an ultramicrotome, and observed by high-resolution tran…
Quantum-confinement-induced shifts in the fundamental absorption edge of isolated CdTe crystallites are reported in CdTe-glass composite thin films produced using a sequential rf magnetron sputtering process employing two separate sputtering sources. Films ranging in thickness from 0.5 to 4.5 μm and containing as much…
In Salmonella typhimurium, de novo synthesis of NAD is regulated through the transcriptional control of the nadA and nadB loci. Likewise, the pyridine nucleotide salvage pathway is controlled at pncB. The transcriptional expression of these three loci is coordinately regulated by the product of nadR. However, there is…
A review and comparison of design procedures for binary-phase and multiphase Fourier gratings used as array generators is presented. Grating structures include one- and two-dimensional binary-phase Dammann gratings, general binary-phase gratings, quarternary-phase Dammann gratings, and kinoforms for which coherent and…
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
The lowest limit of operation temperature for the oxide solid electrolyte oxygen sensors was affected by the electrode materials. The sensors with silver and cobalt‐based perovskite‐type oxide electrodes exhibited theoretical EMF's at lower temperatures than those with Pt electrodes. In particular, the sensor with att…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular crystal structure and magnetic properties of (croconato)- and (oxalato)manganese(II) complexesDiane Deguenon, Gerald Bernardinelli, Jean Pierre Tuchagues, and Paule CastanCite this: Inorg. Chem. 1990, 29, 16, 3031–3037Publication Date (Print):August 1, 1990Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnantioselective addition of dialkylzincs to aldehydes using heterogeneous chiral catalysts immobilized on alumina and silica gelKenso Soai, Masami Watanabe, and Atsuhiro YamamotoCite this: J. Org. Chem. 1990, 55, 16, 4832–4835Publication Date (Print):August 1, 1990Publicati…
The microstructures of gas‐pressure‐sintered materials from β‐Si 3 N 4 powder were characterized in terms of the diameter and aspect ratio of the grains. The size distributions of diameters in materials fabricated by heating for 1 h at 1850° to 2000°C were nearly constant when they were normalized by average diameters…
Abstract The microorganism Pseudomonas oleovorans is known to produce polyesters containing 3‐hydroxyalkanoate units when grown on n ‐alkanes and n ‐alkanoic acids under nutrient limiting conditions, but when 5‐phenylvaleric acid was supplied as the only carbon source, poly[3‐hydroxy‐5‐phenylpentanoate], a polyester w…
We recently purified to near homogeneity a novel type of regulatory protein for smg p25A, a ras p21-like GTP-binding protein, from bovine brain cytosol. This regulatory protein, named smg p25A GDP dissociation inhibitor (GDI), regulates the GDP-GTP exchange reaction of smg p25A by inhibiting dissociation of GDP from a…
The glyceraldehyde-3-phosphate dehydrogenase from the hyperthermophilic archaebacterium Pyrococcus woesei (optimal growth temperature, 100 to 103 degrees C) was purified to homogeneity. This enzyme was strictly phosphate dependent, utilized either NAD+ or NADP+, and was insensitive to pentalenolactone like the enzyme…
Abstract The design, synthesis, characterization, and understanding of new molecular and macro‐molecular substances with “metal‐like” electrical properties represents an active research area at the interface of chemistry, physics, and materials science. An important, long‐range goal in this field of “materials by desi…
Properties of integrated sol-gel PZT thin-films of various Zr/Ti ratios, evaluated as a function of processing parameters, are presented and discussed. The substrate materials for the PZT depositions encompassed Pt, Si, and GaAs. The design, fabrication, and operation of a single PZT element combined with the GaAs JFE…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTStoichiometric catalytic decomposition of nitric oxide over copper-exchanged zeolite (CuZSM-5) catalystsYuejin. Li and W. Keith. HallCite this: J. Phys. Chem. 1990, 94, 16, 6145–6148Publication Date (Print):August 1, 1990Publication History Published online1 May 2002Published in…
The screening of a size-selected cDNA library from the ovary revealed the existence of a second form of PRL receptor in the rat. The polypeptide sequence deduced from cDNAs has a much longer cytoplasmic domain (357 amino acids) than the form previously identified in the liver (57 amino acids). Nucleotide sequence anal…
▪ 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
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Abstract The influence of initial polymer concentration in solution ( c ), weight‐average molecular weight ( M ω ), and drawing temperature on the solid‐state drawing behavior of linear polyethylenes was investigated. Optimum conditions, with respect to maximum attainable draw ratio, are observed in isothermal drawing…
This report summarizes work performed by Argonne National Laboratory on long-term embrittlement of cast duplex stainless steels in LWR systems. Metallurgical characterization and mechanical property data from Charpy-impact, tensile, and J-R curve tests are presented for several experimental and commercial heats, as we…