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In this paper the following questions are considered: What are the phenomena which limit the total fracture energy of a structure under the extension before it breaks? When is the limiting energy level more important that the stress limit? What are possible ways to increase the required fracture energy of a sample bef…
One of the important issues in the determination of induction motor efficiency is the prediction of iron losses in the magnetic circuit. This in essence requires a knowledge of the time variation of the flux density in the steel followed by the knowledge of the iron losses appropriate to that waveform and lamination m…
CsB/sub 3/O/sub 5/ has been found to be phase matchable for SFG down to 0.185 /spl mu/m by mixing the fifth harmonic of a Nd:YAG laser at 1.0642 /spl mu/m and the output of a KTP parametric oscillator pumped by the second harmonic of the same Nd:YAG laser at 20.0/spl deg/C. Improved Sellmeier's equations and nonlinear…
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Visible-range absorption spectra of poly(o-toluidine) and poly(m-toluidine) films on tin-doped indium(III) oxide-coated optically transparent electrodes as a function of applied potential are reported. Absorption maxima and redox potentials shift from values found for polyaniline due to the lower conjugation length in…
Recent developments in electronic components and systems have resulted in the improvement in the detection of partial discharges. However, the interpretation of all the information now available is complicated due to the large number of variables involved. The aim of this paper is to confirm the rapid transition from…
The synthesis, solution redox properties and electronic spectra of a new series of stable, neutral nickel–dithiolene complexes [Ni(R2timdt)2](where R2timdt is the monoreduced anion of the first example of 1,3-dialkylimidazolidine-2,4,5-trithione and alkyl = Et, Pri, Bu), showing an intense electronic absorption at λ≈…
Films were prepared by casting and drying alkaline aqueous film-forming solutions of soy protein isolate (SPI). Four additional types of films were made by combining SPI with poly(ethylene oxide) (PEO) in SPI to PEO ratios of 19:1, 9:1, 4:1, and 1.5:1 (w/w). Glycerin was added to all film-forming solutions as a plasti…
Human coronavirus (HCoV) infection causes respiratory diseases with mild to severe outcomes. In the last 15 years, we have witnessed the emergence of two zoonotic, highly pathogenic HCoVs: severe acute respiratory syndrome coronavirus (SARS-CoV) and ...Read More
The luminescence spectra of the Eu3+-doped rare-earth-metal oxyfluorides, REOF:Eu3+(RE = La, Gd and Y), have been measured at room and liquid-nitrogen temperatures. Simulation of the 7FJ(J= 0–5) Stark levels was carried out with the aid of the phenomenological crystal field (cf) theory according to C3v and Oh symmetri…
New π-conjugated polymers consisting of recurring electron-withdrawing five-membered (thiazole) rings, poly(4,4′-dialkyl-2,2′-bithiazole-5,5′-diyl), are prepared and are found to be electrochemically reduced (or n-doped) at ca.–2. 0 V vs. Ag/Ag+.
High quality epitaxial films of the ‘infinite layer’(IL) compound SrxCa1 –xCuO2(x= 0–1) have been grown by pulsed laser deposition on NdGaO3(110) substrates, thus including the last member of this series CaCuO2, for the first time, to our knowledge. The quality of films varied with the composition: higher quality film…
Void fraction measurement tests for BWR fuel assemblies have been conducted as part of a Japanese national project. The aim was to verify the current BWR void fraction prediction method. Void fraction was measured using an X-ray CT scanner. This paper describes typical results of void fraction distribution measurement…
The new potentially pentadentate (ONNNO donor) ligand 6,6″-bis(2-hydroxyphenyl)-2,2′ : 6′,2″-terpyridine (H2L) reacted with CuII to form the complex [{Cu(HL)}2][PF6]2. X-Ray structural analysis of [{Cu(HL)}2][PF6]2·5MeCN revealed that the complex exists as centrosymmetric dimers. The monomeric unit is four-co-ordinate…
Samples of collagen were cross-linked by two different methods: (a) glutaraldehyde and (b) a combination of dehydrothermal treatment and cyanamide. The elastic modulus, the ultimate tensile strength (fracture stress), strain to failure, work of fracture, and fracture toughness were measured before and after cross-link…
Smectites are clay minerals that expand and contract dramatically in response to changes in water vapor pressure. The expansion/contraction behavior of smectite has considerable importance in engineering applications (such as the stability of building foundations and the integrity of clay barriers) and affects hydrolo…
The phenomenon of electricification by electrostatic induction is introduced. This fundamental approach allows the concepts of Poissonian and Laplacian induced charge to be clearly developed. These concepts form the necessary basis for partial discharge detection analysis. Thereafter a quantitative theory is developed…
Partial discharges (corona) are a symptom of most types of deterioration of motor and generator stator windings rated 4 kV and above. Experience indicates that partial discharges occur years before failure. This leaves sufficient time to plan corrective maintenance to avoid the in-service failure of the motor or gener…
The scales of primitive living actinopterygian fishes, lepisosteids and polypterids, have retained ganoine, a hypermineralized layer which covered the scales of the osteichthyan ancestors. To know finally its tissue origin in the actinopterygian lineage, ganoine formation was described in Lepisosteus oculatus, with sc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, Characterization, and Moessbauer Spectroscopy of Organic Anion Intercalated Pyroaurite-like Layered Double HydroxidesLaiela Raki, Denis G. Rancourt, and Christian DetellierCite this: Chem. Mater. 1995, 7, 1, 221–224Publication Date (Print):January 1, 1995Publica…