Materials Literature
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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…
The resonance method was applied to measure shear mechanical properties of liquids, and it has thus been established that such low-viscosity liquids as water, cyclohexane, hexadecane, and dibutyl phthalate possess a shear elasticity of about ${10}^{6}$ dyn/${\mathrm{cm}}^{2}$ at a frequency of shear oscillations of ab…
A two-wavelength method (δ synthesis) which deals with the experimental distinction of elements with similar atomic number by means of single-crystal X-ray diffraction measurements is presented. This method uses the characteristic wavelength dependence of the anomalous-dispersion correction terms f′ and f′′ close to t…
Summary This paper presents the results of laboratory experiments carried out to investigate the formation of barium sulfate and strontium sulfate [(Ba, Sr)SO4] solid solution in multi-pressure-tapped cores. Two brines, one barium- and strontium-rich and the other sulfate-rich, were mixed in a core plug. Pressure diff…
Surface-relief diffractive optical elements made interferometrically typically are recorded with the off-axis technique, for which the fringe maxima lie on planes that are predominantly perpendicular to the recording surface and with an intensity variation that is sinusoidal. Such a structure can be readily replicated…
The internal structure of spray‐dried alumina granules was characterized by optical microscopy by immersing them in a liquid having a refractive index close to that of alumina. This method provides a unique technique for the detailed analysis of the internal structure of spray‐dried granules.
A simple electro-optical method was developed to characterize the temperature dependent viscoelastic coefficient of six nematic liquid crystals with different conjugation lengths. Results were then used to test seven most frequently used models for rotational viscosity (y1). Computer results show that some models fit…
The transition character of paraelectric-to-ferroelectric phase transition and its relation to lattice soft-mode behavior in the solid solutions of (Ba,Sr)TiO3, (Ba,Ca)TiO3, Ba(Ti,Zr)O3, and Ba(Ti,Sn)O3 were investigated by the measurements of dielectric constants in the temperature range from −30 to 150 °C, and x-ray…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal dehydration of calcium hydroxide. 1. Kinetic model and parametersAngel Irabien, Javier R. Viguri, and Inmaculada OrtizCite this: Ind. Eng. Chem. Res. 1990, 29, 8, 1599–1606Publication Date (Print):August 1, 1990Publication History Published online1 May 2002Published…
Abstract Na-beidellite, a member of the smectite group, was grown hydrothermally from a gel of composition 0.35Na 2 O·2.35Al 2 O 3 ·7.3SiO 2 in NaOH solutions at a pH between 7.5 and 13.5, a pressure of 1 kbar, and a temperature of 350°C. The synthetic Na-beidellite was characterized by means of scanning electron micr…
The synthesis and properties of calcium, strontium, and barium aluminoborate glass‐ceramics are described in this paper. Glass powder compacts near the RO‐Al 2 O 3 ‐B 2 O 3 stoichiometry were sintered and crystallized below 1000°C to form dense glass‐ceramics containing RAI 2 B 2 O 7 as the principal phase. Thermal ex…