Materials Literature
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Article Studies on clathrasils. IV. Crystal structure of dodecasil 1 H, a synthetic clathrate compound of silica was published on August 1, 1984 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 166, issue 1-4).
Two systems were used to generate collagen fibrils in vitro by enzymic cleavage of intermediates in the conversion of procollagen to collagen. In one system fibrils were generated by using procollagen NH2-terminal proteinase to cleave pNcollagen, the intermediate which contains the NH2-terminal but not the COOH-termin…
Ellipsometry and ac impedance measurements were employed for in situ investigation of anodic oxide films on Ru and of oxide films formed by thermal decomposition of Ru chloride. An instrumental setup for experiment control, data acquisition, and data analysis in automated measurements of the ellipsometric parameters a…
Article Bergslagite, a mineral with tetrahedral berylloarsenate sheet anions was published on August 1, 1984 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 166, issue 1-4).
Abstract Neu dargestellt wurde Na 5 [MnO 4 ] aus den binären Oxiden [500°C, 14 d, Ag‐Bömbchen] als braunes Pulver bzw. in Form roter Einkristalle [700°C, 3d]. Die orthorhombische Kristallstruktur (a = 5,822, b = 7,769, c = 6,005 Å, 609 I o (hkl), R = 0,030, MoKα, Zweikreisdiffraktometerdaten (Stasi, Fa. Stoe)) ist dur…
Abstract A design of a high‐temperature cell (used with a Spex‐1403 Ramalog spectrophotometer) for Raman studies with 90° geometry is given. Raman spectra of normal ( d 0 ) and denteriated ( d 12 ) tetramethylammonium chlorides in phases III and II are reported, together with their assignments. On the basis of the tem…
This paper describes HV laboratory tests to study the surface leakage current performance of desert-exposed insulators. It was found that inland desert meteorological conditions and contamination vary considerably from coastal desert areas. Leakage current studies on the simulated desert-polluted insulators exhibit so…
Abstract Dielectric loss measurements are reported for polystyrene, crosslinked polystyrene, polyacrylamide, branched polyacrylamide, and poly(methyl methacrylate) at 1 and 10 kHz f over the temperature range −85 to +100°C. Crosslinking and branching have a pronounced effect on the dielectric relaxation spectra of pol…
Etude de neuf Cepheides de faible amplitude et de courte periode (<8 jours) afin de determiner leurs parametres physiques et proprietes pulsationnelles
It is experimentally known that an antiferromagnetic compound CrSb ( T N ≧700 K) with a NiAs type crystal structure exhibits unusual magnetic properties, that is, sharp decrease of magnetic moment, steep increase of magnetic specific heat and of magnetic susceptibility just below T N with increasing temperature. These…
Redetermination, par diffraction X sur monocristal, de la structure cristalline de BiSBr en utilisant des methodes plus modernes que celles effectuees par Donges (1950). Groupe d'espace Pnam avec a=8,1666, b=9,8532, c=4,0492 A, Z=4. Description de l'arrangement structural des atomes dans la maille. Formation d'un syst…
Copper, a noble metal that occurs naturally in its elemental form, is almost totally impervious to corrosion from soils found worldwide. But it would be misleading to infer that copper will not corrode. This article identifies a host of possible situations in which copper pipe or tubing may be subject to external corr…
The tensile properties of solution-treated Incoloy alloy 800H, Hastelloy-X, Nimonic-86, and Inconel-617 have been determined in the temperature range 20 to 1000°C. The strength parameters at temperatures above 700°C showed a strong dependence on the strain rate; at low strain rates the deformation was dominated by cre…
Abstract The structural phase transition (PT) of elpasolite‐type crystal Cs 2 NaBiCl 6 is investigated by neutron scattering. At first the acoustic phonon dispersion is measured at room temperature for the highsymmetric directions Δ, ∑, and Λ of the Brillouin zone. The transverse rotary mode is studied for phonon wave…
This paper presents a mechanistically consistent model of impact damage based on elastic failures due to tensile and shear overloading. An elastic axisymmetric finite element model is used to determine the dynamic stresses generated by a single particle impact. Local failures in a finite element are assumed to occur w…
A corrosion program is being carried out to establish the long-term corrosion behavior of candidate alloys for the prototype nuclear process (PNP) reactor primary circuit. Results are presented for corrosion tests performed in impure helium over the temperature range of 700 to 900 °C for times up to 10000 h.In the hel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics and kinetics of carbon dioxide chemisorption on calcium oxideDario Beruto, Rodolfo Botter, and Alan W. SearcyCite this: J. Phys. Chem. 1984, 88, 18, 4052–4055Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue…
Metallized film capacitors consist of alternating layers of polypropylene or other polymeric film dielectric and vapor deposited aluminum conductor. During operation above 250 V ac (RMS), circular islands of oxide develop in the aluminum conducting layers and reduce the capacitance. Increasing the aluminum layer thick…
Abstract X‐ray‐induced Auger electron spectroscopy (XAES) was used to examine the surface chemical states of hydrogen implanted metals. The chemical shifts of the M 4,5 N 2,3 V Auger peaks from their metallic states were 1.0 eV, 3.3 eV and 2.2 eV, respectively, for ion‐implanted Y, Zr and Nb. The separation energies w…
We report results obtained with our recently automated low-temperature, adiabatic calorimeter. A brief description of the changes in the instrument are provided. The heat capacities of natural osumilite (Kee3Naa.seCao.ozBaoelMgl s6Fee.3sTis.s1Ala.62 Siro rzOro) were measured from 340 to 1000 K by differential scanning…