Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
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…
Intertidal diatoms from Willapa Bay, Washington: Application to studies of small-scale sea-level changes
Silk fibroin gel (SFG) containing benfotiamine (BTMP) was prepared. The release behavior of BTMP from SFG was studied as a function of silk fibroin (SF) content and glycerol content, and the influence of the existence of beta-cyclodextrin (beta-CD) on the physicochemical properties of SFG were investigated. The releas…
Abstract 1,3 : 2,4-Di-O-benzylidene-d-sorbitol (d-DBS) is known as a chiral oil gelator for a wide variety of organic solvents. The relationship between texture, structure of the gel, and the aggregated structure formed by d-DBS was investigated in various solvents. In the low polar solvents, the gel held a mesh type…
The thermal behaviour of blends of 6-(4-n-butylazobenzene-4′-oxy)hexanoic acid (BABOHA) with three Polymers, polystyrene (PS), poly(2-vinylpyridine)(P2VP) and poly(4-vinylpyridine)(P4VP) has been characterised using differential scanning calorimetry and polarised light microscopy. BABOHA is a monotropic nematogen and…
The chromic acid etching of three propylene polymers has been investigated by contact angle measurement, X-ray photoelectron spectroscopy (XPS), attenuated total reflection infrared (ATR-IR), scanning electron microscopy (SEM), and an adhesion test. It has been shown that etching with such an oxidative acid has a much…
The magnetostrictive behavior of amorphous ${\mathrm{Tb}}_{\mathit{x}}$${\mathrm{Fe}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$ (0.10x0.45) thin films was studied by measuring the stress derivative of the perpendicular anisotropy. Large values of the magnetostriction were found, of order ${10}^{\mathrm{\ensuremath{-}}3}$,…
Saccharomyces cerevisiae has a monofunctional riboflavin synthase that catalyzes the formation of riboflavin from 6,7-dimethyl-8-ribityllumazine. We have isolated the gene encoding this enzyme from a yeast genomic library by functional complementation of a mutant, rib5-10, lacking riboflavin synthase activity. Deletio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic Structure of Triplet States of Zinc(II) TetraphenylporphyrinsValerie A. Walters, Julio C. de Paula, Brian Jackson, Charles Nutaitis, Kelly Hall, Jeffrey Lind, Kevin Cardozo, Kartik Chandran, Duane Raible, and Charles M. PhillipsCite this: J. Phys. Chem. 1995, 99,…
The paper considers the diagnosis of HV constructions which suffer from partial discharge (PD). Using previously developed statistical techniques the properties of discharge patterns are quantified in a fingerprint. Through the analysis of different defects and their fingerprints in HV constructions, the practical imp…