Materials Literature
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A number of new poly(organophosphazenes) have been synthesized which bear 2-butenoxy or (4-(allyloxy)phenyl)phenoxy side groups. Cosubstituent groups included trifluoroethoxy, phenoxy, or (benzyloxy)phenoxy groups. Species with (4-(allyloxy)phenyl)phenoxy units underwent Si−H coupling with linear silanes or siloxanes…
We studied the mechanism behind the double-zincate process, used for pretreating aluminum alloy, through SEM observation, electrode potential tracing, and weight changes determined during each zincate process. Zinc particles grew during the first zincate process, with a thin, uniform Zn layer forming during the second…
Very sharp deformation textures, with single maxima of more than 50x random centred on the rotated cube component ({001}<110>), were produced by submitting a non‐oriented electrical steel sheet to various sequences of cross‐rolling. The cold rolled sheets were subsequently annealed at 730 º C for 3 min. The resu…
In the ZrO 2 ‐Cr 2 O 3 system, metastable t ‐ZrO 2 solid solutions containing up to 11 mol% Cr 2 O 3 crystallize at low temperatures from amorphous materials prepared by the hydrazine method. The lattice parameter c decreases linearly from 0.5149 to 0.5077 nm with increased Cr 2 O 3 content, whereas the lattice parame…
The potential for using subsize specimens to determine the actual properties of reactor pressure vessel steels is receiving increasing attention for improved vessel condition monitoring that could be beneficial for light-water reactor plant-life extension. This potential is made conditional upon, on the one hand, by t…
Studies on Ln[Co(CN)(6)].nH(2)O (Ln = lanthanoid ions; n = 5, 4) by means of thermal analysis, Raman spectroscopy, and X-ray crystallography were carried out, in order to establish the boundary structures in the series. From the thermal analyses, it was confirmed that the complexes include Ln'[Co(CN)(6)].5H(2)O (Ln' =…
The donor-acceptor compounds N,N'-dicyanobenzo[b]naphtho[2,3-e][1,4]dithiin-6,11-quinonediimine (9a) and N,N'-dicyanobenzo[b]naphtho[2,3-e][1,4]oxathiin-6,11-quinonediimine (10a) and their methyl-substituted derivatives (9b and 10b-d, respectively) have been prepared, and their structural and electronic properties hav…
Solids mixing refers to the blending of particulate components differing in one of their properties. To compare mix and mixer theoretical standard deviation σ is defined as the mixing quality. To simulate the stochastic mixing process the Fokker-Planck-Equation is used. Similar simulations described in the literature…
The anticoagulant activity of albumin-heparin conjugates covalently immobilized on carboxylated polystyrene beads was determined before and after exposure to different plasma/PBS dilutions using a thrombin inhibition assay, a FXa inhibition assay, and a modified aPTT assay. Exposure of albumin-heparin modified surface…
A stepwise synthesis of the opp-dibenzoporphyrin (dibenzo[g,q]porphyrin) system involving isoindole precursors is described. 3-Halogeno-1-formylisoindoles are condensed with various α-unsubstituted pyrroles to give the corresponding benzopyrromethene hydrobromides. Thermal self-condensation of such compounds bearing a…
CdS nanocrystallites prepared by capping with pentafluorothiophenol, 2,3,5,6-tetrafluorothiophenol or 4-fluorothiophenol are characterized as quantum dots by TEM, FTIR, NMR, UV–VIS and fluorescence spectroscopy. The crystalline size tends to increase with an increase in the number of fluorine atoms in the capping mole…
Unsteady conjugate mass transfer between a spherical bubble, droplet, or particle and a surrounding fluid flow with chemical reaction in the continuous phase has been analyzed. An algorithm based on spectral methods has been developed and implemented for the simulation of the interphase mass transfer. The influence of…
This investigation established the effects of bulk immiscibility on the bulk and surface structure of FePd catalyst particles supported on graphite. By use of Mössbauer effect spectroscopy, X-ray diffraction and gas-adsorption microcalorimetry, it was shown that iron-rich FePd/Grafoil catalyst particles consist of the…
Numerous methods have been used to illustrate and simulate complex spin-echo phenomena for noninteracting spins. Our approach is to reconstruct the time domain signal by what amounts to a finite Fourier series, the terms of which correspond to spin isochromats. The coefficients of the series evolve in response to puls…
Lithium hydride (LiH) has been shown to react with water at a rate defined by a nonequilibrium thermodynamic-based model. The rate at any time is proportional to the surface area of the LiH multiplied by the difference in chemical activity of the reaction product, lithium hydroxide (LiOH), between the solid phase and…
An analysis of the primary degradation products of the widely used commercial polysulfide polymer Thiokol LP-33 by direct pyrolysis−mass spectrometry (DP−MS) is reported. The mechanism of degradation is through a radical process involving the random cleavage of a formal C−O bond followed by backbiting to form the cycl…
Description Features the latest information on the role of fibers, matrices and their interface/interphase in composite performance. The country'sleading researchers in the field have presented 13 comprehensive, peer-reviewed papers covering innovative approaches to interfacial test methods in composite materials deve…
Pseudomonas putida BM01 was grown efficiently on glucose as the sole carbon source with a supply of a nitrogen source in pH-stat mode using a low setpoint limit. A final cell concentration of 100 g/l was obtained in 30 h of fed-batch cultivation by controlling glucose concentration within the range of 5-20 g/l and mai…
Langmuir monolayers of DHP were confirmed to induce oriented crystallization of HAp in the present study. Both electrostatic and stereochemical interactions at the inorganic-organic interface were of vital importance for the oriented growth of HAp crystals. Organic surfaces with highly ordered functional groups would…
Ceria-supported rhodium catalyst exhibited high activity to decompose nitrous oxide. An introduction of water in the reaction gas remarkably retarded the reaction; the catalyst, however, readily regained its activity when water was removed. On the other hand, oxygen had only a small detrimental effect. ESCA analysis a…