Materials Literature
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The stress required for complete constrained sintering of a low‐temperature cofirable ceramic‐filled glass composite, i.e., borosilicate glass + alumina, has been investigated under uniaxial constant and cyclic loading. The required uniaxial stress to have complete constrained sintering, i.e., zero strain or strain ra…
Thermal decomposition of aluminum isopropoxide in toluene at 315°C resulted in χ‐alumina that had high thermal stability, whereas the reaction at lower temperatures resulted in formation of an amorphous product. The χ‐alumina thus obtained directly transformed to α‐alumina at ∼1150°C, bypassing the other transition al…
Abstract By means of transmission electron microscopy (TEM) and uniaxial tensile testing, the connection between the morphology and the micromechanical properties of selected styrene‐rich styrene/butadiene block copolymers was studied with respect to their molecular architecture. In particular, the structure‐property…
Abstract Wir haben die Kristallstrukturen der Kaliumtetracyanoplatinate und ‐palladate sowie deren Monohydrate mittels Röntgen‐Pulverdiffraktometrie und Einkristallstrukturanalyse bestimmt. K 2 [Pt(CN) 4 ]: orthorhombisch, Pccn , a = 1370.11(2), b = 907.09(1), c = 703.91(2) pm, Z = 4, R F 2 = 0.0903 (N( hkl ) = 415).…
We report the first experimental observation of a nonlinear laser effect, stimulated Raman scattering (SRS), in manmade diamond grown from the gaseous phase by the chemical vapor deposition (CVD) technique. Multiple Stokes and anti-Stokes generation in the visible and near-IR ranges was excited under nanosecond and pi…
Abstract The sputter deposition of stoichiometric TiO 2 thin films has been investigated, in view of photocatalytic application. DC magnetron sputtering from ceramic targets in an argon/oxygen atmosphere was chosen as the deposition technique. Composite TiO 2 Ti targets with metallic Ti fraction from 0 to 70 wt% were…
The reactions of a low-valent titanium(II) tetratolylporphyrin complex, (TTP)Ti( η 2 -PhC⋮CPh) ( 1 ), with various aromatic aldehydes or aryl ketones afforded the reductive coupling products Ti(IV) diolato complexes ( 2a − c, 3a − d ). Treatment of 1 with two different carbonyl compounds selectively produced cross-cou…
Na região dos Lagos do Rio de Janeiro, a existência de um clima mais seco condiciona um ambiente peculiar no sudeste brasileiro, com forte tendência à salinização e xerofitismo. Foram realizados estudos físicos, químicos, mineralógicos e micromorfológicos em transectos de solos da região. Os solos são eutróficos, cons…
A comparison of the structural parameters of a wide variety of compounds containing the S–S bond is summarized.
Este estudo teve como objetivo identificar os minerais fonte de K em dois solos originários de basalto: um Latossolo Vermelho distroférrico típico e um Nitossolo Vermelho distroférrico típico. A análise mineralógica por difratometria de raios-X mostrou a provável presença de um mineral micáceo nas frações silte fino e…
The corrosion behaviour of Cr(III) based conversion coatings on electrogalvanised steel was studied using polarisation and electrochemical impedance spectroscopy measurements in 0.01M NaCl solution (pH 6). The Cr(III) based conversion treatments were carried out in two different commercial trivalent chromium baths (pH…
In order to carry out deuterium plasma experiments on the Large Helical Device (LHD), the National Institute for Fusion Science (NIFS) is planning to install a system for the recovery of tritium from exhaust gas and effluent liquid. As well as adopting proven conventional tritium recovery systems, NIFS is planning to…
O artigo descreve as células satélites musculares, marcadores, quantificação e distribuição, fatores de crescimento e hormônios envolvidos na sua regulação, interação com monócitos e macrófagos, respostas funcionais a estados fisiológicos e de doença, modelos genéticos de miopatia e de regeneração muscular, formação d…
Suzuki segregation to stacking faults and coherent twin boundaries has been investigated in a Cu-7.15 at.% Si alloy, heat-treated at temperatures of 275, 400 and 550 degrees C, using field-emission gun transmission electron microscopy. Silicon enrichment was observed at the stacking fault plane and decreased monotonic…
Corrosion control of aluminum alloys in the aerospace industry has been of great interest in recent years, especially the aging of certain fleets in the United States Air Force. A thin film of poly(2,2,2-trifluoroethyl acrylate) (PTFEA) has been deposited on aluminum alloy coupons by admicellar polymerization for the…
Accurate surface tension of Teflon® AF 1600 was determined using contact angles of liquids with bulky molecules. For one group of liquids, the contact angle data fall quite perfectly on a smooth curve corresponding to γsv = 13.61 mJ/m2, with a mean deviation of only ±0.24 degrees from this curve. Results suggest that…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionMeasurements, Theory, and Modeling of OH Formation in Ethyl + O2 and Propyl + O2 ReactionsJohn D. DeSain, Stephen J. Klippenstein, James A. Miller, and Craig A. TaatjesCite this: J. Phys. Chem. A 2004, 108, 34, 7127–7128Publ…
Abstract Because of environmental concerns, biodegradable materials have been of increasing research interest over the last several years. Previously, we reported on a biobased material developed from epoxidized soybean oil (ESO) that displayed viscoelastic behavior similar to synthetic rubbers or plastics. In this wo…
Les titanates du groupe de l'ilmenite sont des mineraux accessoires relativement repandus dans les venues de syenite nephelinique agpaitique (lujavrite) du complexe alcalin de Pilansberg, en Afrique du Sud. Ils ont cristallise en trois generations et definissent une solution solide continue entre ecandrewsite et pyrop…
Neutron radiography is used to study moisture transport in textiles for the first time. A selection of clothing systems composed of layers with differing water transport properties is studied to demonstrate the feasibility of using the technique. The results are compared to the weights of the individual layers obtaine…