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。
Bacterial quinones were analysed by two‐dimensional thin‐layer chromatography with ready‐made, multi‐phase silica gel plates which allowed good separation of complicated quinone mixtures. A combination of this method and silver‐ion‐modified thin‐layer chromatography made it possible to identify partially hydrogenated…
Breakdown voltage of air gaps is strongly affected by atmospheric conditions such as temperature and humidity. Detailed information on the effect of atmospheric conditions on the AC breakdown is available. However, similar data on the DC breakdown characteristics, particularly at high humidities, is scarce. DC data on…
Carburization and decarburization behavior in sodium have been examined for Fe-9Cr-Mo ferritic steels exposure to flowing sodium with containing 0.0049, 0.016 and 0.16 wppm carbon at temperatures between 723 and 873 K. The Fe-9Cr-Mo ferritic steels were more resistant to carbon transfer than 2 ¼ Cr-lMo steel. The carb…
The rheological properties of a paste containing chopped alumina fiber and particulate silica suspended in a gelled boehmite liquid phase have been evaluated using a physically based extrusion model. When sintered, the paste formed a mullite‐alumina fiber composite. Extrudates with fiber volumes up to 30% in the sinte…
The crystallography and nucleation of the Cr phase (α) from both β-Ni(Al, Ti) and γ'-Ni3(Al, Ti) in an α-β-γ' three-phase alloy are investigated using analytical electron microscopy. The α particles in β are spherically shaped and oriented parallel with the parent phase. Those in γ' are lath-shaped with a well-defined…
Abstract Kristallinitätsgrad, Kristallitgröße und Gitterstörungen von nativen und isolierten Cellulosen wurden röntgenographisch ermittelt. Der Kristallinitätsgrad und die Kristallitlänge der nativen Cellulose von Graspflanzen sind niedriger als die von Holz, Flachs und Baumwolle. Die lateralen Kristallitabmessungen d…
Oxidation of Mn2+aq by HSO5- to manganese(IV) in the presence of molybdate ion in acetate buffer involves the formation of the soluble heteropolymolybdate anion [MnMo9O32]6-. This was crystallized as K6[MnMo9O32].6H2O from the reaction mixture in the rhombohedra1 space group R 32, a 15.569(1), c 12.432(1) Å , and the…
The electrode kinetics of iron dissolution and hydrogen evolution and the corresponding corrosion rates have been determined in chloride solutions of varying ionic strengths. Correlations have been observed between these parameters and the estimated water activities in these solutions. The effect of aH2O on the iron d…
This is an investigation of the relationship between graft preparation techniques and the subsequent fate of vein grafts. Vein grafts intentionally injured by warm saline storage demonstrated endothelial and smooth muscle cell damage. In the acute postimplantation period, platelet adhesion/activation and white cell in…
A new minimax method for refining optical multilayer systems is presented. It minimizes the maximum deviation of the spectral transmittance from the desired specifications. These are assigned in such a general way that any shape can be approximated. The algorithm consists of iterating optimization steps that are obtai…
The behaviour of chiral, polymer dispersed cholesteric liquid crystals with negative dielectric anisotropy in electric fields has been studied for a system with large cholesteric pitch (several μm) using polarizing microscopy. A uniformly oriented region appears in the centre of the droplets for voltages above a thres…
A novel laser scatterometer linewidth measurement tool has been developed for critical dimension metrology of photomasks. Calculation of the linewidth is based on a rigorous theoretical model, thus eliminating the need for calibrations. In addition the effect of the glass substrate on which the photomask grating is pl…
Polyol Metal Complexes, II [1] . – Copper(II) Complexes with Multiply Deprotonated Ethylene Glycol, Anhydro‐erythritol, or Methyl α‐D‐Mannopyranoside as Ligands Violet to blue crystals of the polyolate cuprates Li 2 [Cu(eth 2− ) 2 ] · 6 H 2 O ( 1 ), A 2 [Cu(eryAn 2− ) 2 ] · 4 H 2 O, A = Na ( 2a ), K ( 2b ), and Li 3 […
Abstract Fluorescent spectra of the mononuclear europium(III) complex, Eu(H2 fsaen) (NO3)·5H2O, and the heteronuclear complexes MEu(fsaen) (NO3)·nH2O (n = 4 for M = Cu(II) and n = 6 for M = Ni(II)), were compared, where H4 fsaen is a binucleating ligand, N,N′-bis (3-carboxysalicylidene)ethylenediamine. It was found th…
A discussion of partial discharge (PD) testing of SF/sub 6/ gas insulated substations (GISs) is based on a consensus among the experts on and associated with WG K4 of the IEEE Substations Committee. Such testing is discussed in the context of type testing, factory routine testing, testing of solid dielectric spacers,…
Abstract The time-resolved thermal lensing (TRTL) technique was employed to study the photocyclization of diphenylamine (DPA) to form intermediate 4a,4b-dihydrocarbazole (DHC) in methanol solution at room temperature. The heat of reaction, ΔH, was determined to be (2.6 ± 0.2) × 102 kJ mol−1 (1DPA → 1DHC): The reaction…
The results of life tests performed on XLPE and EPR cable models are presented and discussed. The performance of the two insulating materials when subjected to electrical stress are compared on the basis of characteristic parameters derived by the best-fitting life models. It is found that while EPR is well described…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApplication of the molecular simulation technique for clarification of the α .tautm. β phase transformation in poly(butylene terephthalate)Scott A. Nitzsche, Ying K. Wang, and Shaw L. HsuCite this: Macromolecules 1992, 25, 9, 2397–2400Publication Date (Print):April 27, 1992P…
DuPont E-120 high-modulus pitch-based carbon fibers were treated electrochemically in 0.5 M (NH 4 ) 2 CO 3 solution under both potentiostatic and galvanostatic modes. X-ray photoelectron spectroscopy (XPS) was used to monitor the chemical changes on the carbon fiber surfaces. Both core-level and valence-band spectra s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of regeneration conditions on the characteristics of water vapor adsorption on silica gelRong Luan Yeh, Tushar K. Ghosh, and Anthony L. HinesCite this: J. Chem. Eng. Data 1992, 37, 2, 259–261Publication Date (Print):April 1, 1992Publication History Published online1…