Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle Crystal Study of ClOO. Matrix Effects in the ESR and IR Spectra of ClOO Trapped in KClO4J. R. BybergCite this: J. Phys. Chem. 1995, 99, 36, 13392–13396Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September…
A theoretical study of the mechanism of the first oxidation step of disulfides to thiosulfinates was performed on hydrogen disulfide and methyl disulfide with hydrogen peroxide. Ab initio molecular orbital calculations were carried out with the 6-31G** basis set. Key equilibrium geometries and transition states were o…
The volume and grain boundary diffusion coefficients (D v and δD gb ) of oxygen at 1673 K in pure and Mg‐doped alumina were studied by using a resistive anode encoder of SIMS. The effect of Mg‐doping on D v , was observed clearly. The differences on δD gb in pure and Mg‐doped alumina were about 3 orders and 1 order of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDefects and molecular alignment in monolayers of thermotropic liquid crystals on waterMarc N. G. de Mul and J. Adin Mann Jr.Cite this: Langmuir 1995, 11, 9, 3292–3295Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 S…
In this paper we show that, for any 3-connected graph G, if an automorphism of G is realizable by a homeomorphism of (S 3 , G) then there is an embedding of G such that that automorphism is induced by a finite order homeomorphism of (S 3 , G). We then use this result to characterize which automorphisms of an arbitrary…
Instead of the classic Fourier equation based on diffusion, a hyperbolic equation based on a wave model has been used to predict the rapid transient heat conduction in IC chips. The peak temperature, spatial difference, and time variation of temperature, which are critical to thermal reliability of the chip, are given…
A new theoretical approach for the prediction of the growth habit of crystals is presented. This approach is based on a newly derived relation between the growth rate of crystal surfaces and habit-controlling factors, and includes a key step: a so-called interface structure (IS) analysis. This analysis is to formulate…
A shift of the intrinsic conductivity minimum of strontium titanate ceramics, which depends on the oxygen partial pressure of the sintering atmospheres, was observed. Different hydrogen partial pressures (at constant oxygen partial pressures) did not affect the minimum position. A comparison of the results with defect…
The twisting power of chiral probes in nematics is interpreted in terms of a shape model, in which the surface elements of the solute molecules tend to align with the local director. The theoretical treatment is based on a previous approach, suitable for relating order parameters in nematics to molecular shape, and le…
Abstract The capacity of soil organic matter (SOM) to reduce K fixation was investigated in calcareous vermiculitic soils. Humic acid fractions were extracted with the use of a modification of the standard NaOH extraction procedure. The mobile humic acid pool (MHA) was extracted without initial decalcification. Additi…
Abstract A model dissolution/reprecipitation process is studied for the recycling of high‐density polyethylene (HDPE). The process proposed basically comprises dissolution of the plastic in an appropriate solvent, reprecipitation by using a nonsolvent, thorough washing of the material obtained, and drying. The solvent…
Negative substrate-bias effects on diamond heteroepitaxial nucleation have been investigated using microwave plasma-assisted chemical vapor deposition. The density and the percentage of azimuthally ordered particles grown on carburized Si(001) or on high-quality β-SiC(001) have been estimated by varying the bias-treat…
SPECTRA® polyethylene fibers are rapidly gaining acceptance in many applications in which high strength and modulus are required. They also represent a breakthrough in fiber technology because they represent the first case of a successful conversion of a flexible polymer into an ultra-strong fiber. Until the work of P…
The general formula of a phase relation between well-known bismuth layer-structured ferroelectrics (BLSF) such as Bi 3 TiNbO 9 , Na 0.5 Bi 2.5 Nb 2 O 9 , Bi 4 Ti 3 O 12 , and Na 0.5 Bi 4.5 Ti 4 O 15 including perovskite compounds (Bi 0.5 Na 0.5 ) TiO 3 and NaNbO 3 , that is, Na ( m -3+ x )/2 Bi ( m +5- x )/2 Ti m - x…
The crystal structure of the unliganded alkaline protease from Pseudomonas aeruginosa IFO3080 has been determined at 2.0 A resolution by the X-ray method. The enzyme consists of N-terminal catalytic and C-terminal beta-helix domains. On structural comparison between the present unliganded enzyme and structurally- know…
The purpose of this study was to evaluate efficacy and safety of a gadolinium (Gd) zeolite suspension as an oral MRI contrast agent. Serial dilutions of GADO-LITE Oral Suspension 1,2-300 micrograms of Gd(III)/mL) were prepared. MRI (T1 and T2 weighted) of standards and dogs (precontrast and postcontrast) were performe…
RNA polymerase from Bacillus subtilis is a complex mixture comprising a common core (beta beta' alpha 2), the 20.4 kDa delta (delta) protein, and of one of several sigma (sigma) specificity factors. The delta protein, together with several truncated variants, has been overproduced and purified from Escherichia coli. I…
General theory general methods of solution for fundamental problems methods of solution for various particular problems problems with compound boundary conditions fundamental crack problems fundamental crack problems of composite materials on the uniqueness theorems for fundamental problems.
Summary In an acid soil, amounts or organic carbon resistant to peroxidation with hydrogen peroxide were strongly related to the proportions of expandable phyllosilicate (vermiculite, smectite) in the clay fraction, as measured by its K 2 O content and cation exchange capacity. This was taken to indicate that a substa…
Abstract In this work a model, composed of the nonlinear Cahn‐Hilliard and Flory‐Huggins theories, is used to numerically simulate the phase separation and pattern formation phenomena of oligomer and polymer solutions when quenched into the unstable region of their binary phase diagrams. This model takes into account…