Materials Literature
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Abstract Trigonal CdSb 2 O 6 , prepared as a very crystalline powder by solid state reaction of CdO and Sb 2 O 3 , is isostructural with PbSb 2 O 6 Space Group (S.G.) P31m (162), with a = 5.2399(2), c = 4.8045(4) Å, Z = 1 and D c = 6.57 Mg.m −3 . For the refinement of structural parameters from X-ray powder diffractio…
São apresentados os resultados do estudo do fitoplâncton e de algumas variáveis físicas e químicas da água em um trecho do Rio Jacuí, com base em amostragens realizadas em julho de 1986. As coletas foram efetuadas em três secções do rio, incluindo, além da área de influência direta de efluentes industriais, ricos em r…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational and electronic spectra of tetrakis(formato)diruthenium(1+)Vincent M. Miskowski, Thomas M. Loehr, and Harry B. GrayCite this: Inorg. Chem. 1988, 27, 26, 4708–4712Publication Date (Print):December 1, 1988Publication History Published online1 May 2002Published iniss…
The temperature dependence of the lattice parameter a of the powder samples of the mixed spinels Zn1− xCuxCr2Se4 was measured in the temperature range 100–570 K by the X-ray powder diffraction technique. The temperature dependence of the magnetostriction was observed from these results. For x = 1.0, 0.9, 0.8, 0.3 and…
The nucleation fields of sintermagnets are determined on the basis of micromagnetism taking into account the deteriorating effects of local stray fields, misaligned grains and reduced anisotropy constants of grain surfaces. It is shown that the nucleation hardening model gives a coherent description of the outstanding…
The saturation magnetization, 4πMs, and the magnetostriction constant, λ, of Ni81Fe19, Ni81Fe19/Ta and Ni72Fe17Rh11/ Ta thinfilms were studied as a function of film thickness before and after annealing. For films of thickness t < 200 Å, 4πMs, and λs were found to be strongly dependent on film thickness with even large…
C. L. Sanders, K. E. McDonald, K. E. Lauhala, Promotion of Pulmonary Carcinogenesis by Plutonium Particle Aggregation Following Inhalation of ${}^{239}{\rm PuO}_{2}$, Radiation Research, Vol. 116, No. 3 (Dec., 1988), pp. 393-405
Traditional environmental cracking test methods such as the NACE tensile test or the MgCl2 test have limitations for extreme sour service materials evaluation. The slow strain rate test (SSRT) method overcomes many of the disadvantages of more traditional test methods, while still posing some unique questions of its o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of a polymer surface containing covalently attached triethoxysilane functionality: adhesion to glassKang Wook Lee and Thomas J. McCarthyCite this: Macromolecules 1988, 21, 12, 3353–3356Publication Date (Print):December 1, 1988Publication History Published online1 M…
The crystalloid structure, an aperiodic arrangement of small structural units, observed in Ni-Cr small particles was studied by selected-area electron diffraction, dark-field imaging, high-resolution electron microscopy and optical diffraction analysis using the high-resolution micrographs. The electron and optical di…
Summary Drillstring failures continue to plague the oil industry, often costing millions of dollars each year. This problem is frequently intensified with the drilling of deep, deviated wellbores or "hard rock" drilling conditions. The drilling industry attempts to guard against these costly failures by performing per…
Glutaraldehyde cross-linking of native or reconstituted collagen fibrils and tissues rich in collagen significantly reduces biodegradation. Other aldehydes are less efficient than glutaraldehyde in generating chemically, biologically, and thermally stable cross-links. Implants of collagenous materials cross-linked wit…
The preparation and characterization of machinable mica glass‐ceramics by the sol‐gel process are described. The thermal behavior of the precursor and the optimum conditions for calcination, molding, and sintering are given. Physical, chemical, thermal, electrical, and mechanical properties are investigated, and the m…
Beam broadening is discussed in the context of the standard formalism for multiple small-angle scattering, in which coherent single-particle scattering is incoherently, or stochastically, compounded by a random system of spherical particles in a uniform matrix. Bethe's analysis of scattering when sample thickness grea…
Electrochemical techniques were used for the study of crevice corrosion of two nickel-based alloys in aqueous solutions of 1 M NaCl and 1 M NaCl + 0.01 M Na2S2O3. Artificial metal/Teflon† crevices were used and principal testing temperatures ranged from 20 to 80 C. The studies were supplemented by anodic polarization…
Abstract not Available.
Colloidal dispersions have structure on length scales from 10 to 1000 Å. Both inter- and intraparticle scattering contribute to the measured small-angle scattering spectra. Here are reviewed methods of quantitatively analyzing scattering from interacting polydisperse colloidal suspensions. The concept of a colloidal m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeme model studies related to cytochrome P-450 reactions: preparation of iron porphyrin complexes with carbenes bearing a .beta.-oxygen atom and their transformation into iron-N-alkylporphyrins and iron-metallacyclic complexesIsabelle. Artaud, Nathalie. Gregoire, Jean Paul.…
Abstract Successive phase transitions were observed for CsSnBr3 and CH3NH3SnBr3 by means of 81Br NQR and DTA. These compounds are isomorphous with each other and have typical cubic perovskite structures at room temperature. However, with decreasing temperature both compounds showed successive phase transitions and com…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and chemistry of a dinuclear iridium bis-.mu.-oxo complex. Observation of oxygen transfer and phosphorus-carbon bond cleavageWilliam D. McGhee, Thomas. Foo, Frederick J. Hollander, and Robert G. BergmanCite this: J. Am. Chem. Soc. 1988, 110, 25, 8543–8545Publicatio…