Materials Literature
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In the hot dip galvanizing process two different fluxes are used to remove the zinc oxide layer, always present on the liquid zinc surface. When this oxide layer, which contains also aluminium oxide, is dragged into the zinc by the articles, interfering the reaction zinc-iron. In former days a flux floating on a part…
Abstract An interionic potential model is developed for lighter and heavier alkali hydrides and deuterides. The method uses a combination of theoretical techniques, empirical fit, and a few plausible assumptions. An assessment of the derived potentials is made by calculating the lattice statics and dynamics of the cry…
Time evolution of non-equilibrium systems, where the probability density is described by a continuum Fokker-Planck (F-P) equation, is a central area of interest in stochastic processes. In this paper, a numerical solution of a two-dimensional (2-D) F-P equation describing the growth of helium-vacancy clusters (HeVCs)…
Calotropin isolated and characterized from the roots of Calotropis procera when administered to gerbils (25mg/kg b.wt) and rabbits (25mg; kg b.wt) each day for a period of 30 days inhibited the process of spermatogenesis. The population of spermatids was depleted by 65% and 94% in gerbils and rabbits. The seminiferous…
A reflection electron microscope for ultrashort-time imaging of laser-induced processes on surfaces was developed. The instrument is based on a conventional transmission electron microscope modified for high-energy electron reflection, and, in addition, equipped with a laser-pulsed high-brightness electron gun, an int…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and reactions of meso- and dl-D3-trishomocubylidene-D3-trishomocubaneAlan P. Marchand, G. Madhusudhan Reddy, Mahendra N. Deshpande, William H. Watson, Ante Nagl, Oh Seuk Lee, and Eiji OsawaCite this: J. Am. Chem. Soc. 1990, 112, 9, 3521–3529Publication Date (Print)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBenzoquinone-olefin exciplexes: the observation and chemistry of the p-benzoquinone-tetraphenylallene exciplexKaryln A. Schnapp, R. Marshall Wilson, Douglas M. Ho, Richard A. Caldwell, and David CreedCite this: J. Am. Chem. Soc. 1990, 112, 9, 3700–3702Publication Date (Print…
The investigation of electrode materials based on Li-V 2 O 5 /MoO 3 was performed by V L α soft X-ray emission, V K -absorption, and photoelectron spectroscopies. During the discharge process lithium is inserted into the electrodes accompanied by a surface enrichment of LiO − groups. As the X-ray absorption spectrum o…
Over fifty fuel/cladding compatibility tests on irradiated metallic fuel specimens have been conducted in an in-cell facility at elevated temperatures. At temperatures below 700--725{degree}C, no fuel/cladding interaction was noted in tests up to 7 h. Liquid-phase cladding penetration occurred in some of the tests at…
The corrosion resistance and microstructure of four highalumina and two chromia‐containing high‐alumina refractories were evaluated. Analysis of the refractories after exposure in the rotary slag test showed that the chromia‐containing products had better slag resistance than the chromia‐free products. Three factors c…
The reaction of ReCl 5 with a porphyrin H 2 (P) [2, 3] in refluxing trichlorobenzene represents a very efficient synthesis of oxorhenium(V) porphyrins ReO(P)X where X is a uninegative anion. Thus, rhenium is inserted to octaethylporphyrin and a variety of tetraarylporphyrins. The primary products are the paramagnetic…
Transition-metal bindíng (e.g. Cu(II)) to hydrous oxide surfaces (e.g.δ-Al<sub><sub>2</sub></sub>0<sub><sub>3</sub></sub>) is investigated in the presence of different classes of phosphates. The interactions between the Cu(II) ion and orthophosphate, pyrophosphate, tripolyphosphate, nitrilotris(methylene)triphosphonat…
The acoustic transients associated with optical cavitation in water have been studied using a high-speed interferometric technique. Radial pressure profiles of these spherical transients have been obtained over a range between 2 and 22 mm from the centre of the cavity. Pressure-radius relationships and transient energ…
Abstract 2‐Ethylhexylpoly(trimethylene 1,3‐phosphate) ( 3 ), poly(1,2‐glycerol phosphate) ( 1 ) and poly‐(1‐acetoxy‐2,3‐glycerol phosphate) ( 2 ) were synthesized and used as synthetic analogues of teichoic acids. Their properties as a carrier of magnesium and calcium ions were examined in the competitive exchange dif…
For several years the study of magnetic properties of quasicrystals was limited mostly to Mössbauer spectroscopy and susceptibility measurements on paramagnetic and spin-glass alloys primarily in the Al–Mn(–Si) system. A distribution of low-symmetry Mn sites appears to exist with only the larger sites (making up appro…
In order to investigate strain burst behavior of planar slip materials, single crystals of Cu-15.3at.%Al alloys, oriented for easy glide, were cyclically deformed under load and strain control. A huge strain burst (γp = 0.12) observed in a load-controlled fatigue test is related to easy-glide behavior after yielding.…
Ion chromatography and wavelength-dispersive X-ray spectroscopy methods for the quantification of ionic contaminants in XLPE cable insulation are reviewed. Cationic contaminants include sodium, potassium, calcium, aluminum, iron and silicon. Anionic impurities include chloride, sulfate, and nitrate. Concentrations of…
The desorption of CO from clean and sulfur-covered Ru(001) surfaces was studied using laser-induced thermal desorption (LITD) and temperature programmed desorption (TPD) techniques. CO was observed to desorb from clean Ru(001) with coverage-dependent kinetics. The isothermal desorption of CO was monitored with LITD me…
A numerical analysis of a four-electrode electron mirror is presented. It is shown that this system can have adjustable aberration coefficients, opposite to the aberrations of conventional electron optical systems. Therefore, it is possible to use such an electron mirror as an aberration corrector to further improve r…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApparent absence of electronic instability in the one-dimensional metal sodium copper sulfide (Na3Cu4S4)Myung Hwan Whangbo and Enric CanadellCite this: Inorg. Chem. 1990, 29, 7, 1395–1397Publication Date (Print):April 1, 1990Publication History Published online1 May 2002Publ…