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。
We present the results of a study of the room-temperature polarized reflectance of (1:2) 1,1'-dimethylferrocenium ditetracyanoquinodimethanide [(${\mathrm{Me}}_{2}$Fc)(TCNQ${)}_{2}$] over the range between the far infrared and the near ultraviolet. Kramers-Kronig analysis of the reflectance is used to determine the op…
The optical properties of glasses containing a small amount of thermally developed CdSexS1−x microcrystalline phase are studied with emphasis on quantum confinement effects exhibited at small crystallite size. Optical absorption, photoluminescence, x-ray diffraction, and transmission electron microscopy are used to ex…
In order to account for the differences observed between low and high temperature deformation textures, the influence of slip or cross‐slip on planes other than the {111} is considered in FCC metals. The first set of possible new slip systems treated is the {100}〈110〉. The dual single crystal yield surface is construc…
A method of polarization ray tracing for calculating the instrumental polarization function of an optical system using the Jones calculus is presented. Polarization ray tracing supplements the equations of ray tracing to include amplitude, phase, polarization and retardance effects of thin films, polarization elements…
Intracavity nearly degenerate four-wave mixing has been used together with transmission measurements to evidence the important role played by Auger recombination in the relaxation rate of electron-hole pairs in semiconductor-doped glasses pumped by high laser intensities. Results show a shortening by a factor of 100 o…
The goal of the triagency SP-100 Program is to develop long-lived, compact, lightweight, survivable nuclear reactor space power systems for application to the power range 50 KWe to 1MWe. The successful development of these systems should enable or significantly enhance many of the future NASA civil and commercial miss…
A 1.8-A resolution x-ray crystallographic restrained least squares refinement has been carried out on the phenylethane boronic acid (PEBA) complex of alpha-chymotrypsin dimer (alpha-CHT), and it has been compared to the 1.67-A resolution structure of the native enzyme. PEBA has a high binding affinity for alpha-CHT, a…
Solute exclusion was used to determine the pore volume and micropore size distribution of wet cellulosic materials. Glucose, cellobiose, and polyethylene glycol (PEG) (8 to 130 A in diameter) were used as molecular probes. Four replicates of cellulosic samples, with each sample being analyzed 4 to 8 times, gave the co…
A viable chemical surrogate for monitoring the effectiveness of hazardous waste incinerators must include high thermal stability and low toxicity among its characteristics. The relationship between sulfur hexafluoride (SF6) and hazardous constituent thermal stability for a mixture of chlorinated hydrocarbons indicates…
Abstract Single crystals of LHP (Lead Hydrogen Phosphate) have been grown using the controlled reaction between lead nitrate and orthophosphoric acid solution by diffusion process in silica gel medium. Transparent crystals upto 6 × 4 × 3 mm 3 in size have been grown at room temperature. The d.c. electrical conductivit…
From more than one hundred Nickel-Aluminium (Ni-Al) bronze sand cast ship propellers, the effect of thickness on the properties of the material has been investigated. For this purpose the mechanical and corrosion fatigue properties have been measured
Abstract Measurements of electrochemical photocapacitance spectroscopy (EPS) of ZnSe were carried out with the aim of studying the effect of photoelectrochemical etching. A new transition is observed that can be assigned to a shallow acceptor state. The observation of that transition is explained by the etching‐out of…
The oxidation states of chromium dissolved in binary sodium silicate glasses were analyzed by X‐ray photoelectron spectroscopy (XPS). The measured “equilibrium” Cr 6+ fractions in glasses with varying Na 2 O contents are shown to be in good agreement with results obtained by other techniques reported in the literature…
Abstract Defect Sites of CdO, Reducibility, Analysis Three procedures of chemical analysis are proposed for the direct determination of excess Cd in CdO: a spectrophotometric, a titrimetric and a gravimetric one, for 0-1500 ppm, 500-50,000 ppm and above 5%, respectively. The good reproducibility and reliability is ill…
Solid mixtures containing initially uniform dilute concentrations of impurity elements may, upon the application of mechanical and thermal loading, develop regions of high impurity concentration that could result in local degradation of material properties. To address these degradation processes, a fully coupled therm…
A commercial corrosion measurement system has been used in conjunction with an AC superposition circuit to produce linear potentiodynamic anodic polarizations of AISI 303 and AISI 316 stainless steels (SSs) in 1 N H2SO4. The resulting plots show that AC has a depassivating effect on the normally passive region of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and properties of iron(II), cobalt(III), and zinc(II) N-alkylporphyrin complexes involving five-membered metal-O-C:C-N-metallacyclesJean Paul Battioni, Isabelle Artaud, Daniel Dupre, Philippe Leduc, and Daniel MansuyCite this: Inorg. Chem. 1987, 26, 11, 1788–1796…
The mechanism of the so called "area effect" in vacuum dis charge studies was investigated. Point-plane aluminum electrodes were used with point radius 1.5 mm and gaps between 0.5 and 10 mm. It was found that a capacitor connected in parallel with an electrode gap reduces the electrical strength in a manner similar to…
Carbon-14 is produced in pressurised heavy water reactors (PHWR), mainly as an activation product in the fuel. It is also produced in the heavy water used as the primary coolant and moderator, and is produced in the air in the annular space between the pressure tube and calandria tubes as well as in the free space in…
A mathematical model is developed for the corrosion of a rotating iron disk in sulfuric acid. The model treats explicitly the coupling of interfacial reactions with the mass transfer of ionic species by migration, diffusion, and convection in both the diffuse part of the double layer and the diffusion layer. The corro…