Electron theory in alloy design
"Electron theory in alloy design." International Materials Reviews, 38(3), pp. 154–155
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Sol–gel encapsulated transition metal quaternary ammonium ion pairs as highly efficient recyclable catalysts
Sol-gel entrapped Rh–, Pt–and Co-ammonium ion pairs formed by polymerization of (MeO)4Si in the presence of the appropriate metal halides and quaternary ammonium salts, are highly stable, efficient and recyclable hydrogen transfer catalysts.
The layer polymer {[Bi(C6H6)Cl3]2}2∞: very weak bismuth–arene bonding in the parent compound of the bismuth analogue of menshutkin complexes
[Bi(C6H6)Cl3, obtained from a benzene solution of BiCl3, has been shown by X-ray crystallography to be a layer polymer with very weak bismuth–benzene π-bonding.
Diffraction analysis of incommensurate phases in crystals of quasi-binary system Sn2P2(S1−xSex)6
X-ray analysis of Sn2P2(S1 − xSex)6 single crystals with 0 < x < 1 is performed in the temperature interval 70 to 400 K in which there exist the incommensurate modulated structures. Crystallographic characteristics of the modulation wave are obtained: the direction of a wave vector q at an angle 9° with respect to the…
Aspects of Robust Computational Modeling for Plain and Reinforced Concrete
The problems commonly encountered in the numerical analysis of reinforced structures are often related to biaxial stress states in the structure. In this study this problem is solved with the formulation of a composite plasticity model which describes both cracking and crushing of concrete within the framework of plas…
Adsorption of cationic potato starch on microcrystalline cellulose
The adsorption of cationic potato starch on microcrystalline cellulose was investigated taking into account that starch is a mixture of amylose and amylopectin. The separate adsorption of both components could be calculated by determining starch concentrations twice using two methods having a different sensitivity for…
Theoretical determination of angularly-integrated energy loss functions for anisotropic materials
The general expression for angularly integrated electron-energy-loss functions for anisotropic materials is derived for arbitrary specimen orientations with respect to the incident angle of a fast electron. For uniaxial (tetragonal, trigonal and hexagonal) and biaxial (orthorhombic) crystal systems, the angularly inte…
Luminescence spectroscopic study of europium(III) and terbium(III) with ethylenediamine in dimethyl sulfoxide
The luminescence excitation and emission spectra of europium(III) and terbium(III) complexes of ethylenediamine (en) in dimethyl sulfoxide have been studied. The 7F0→5D0 spectra of EuIII and the values of the luminescence decay constant confirmed that trivalent lanthanides from 1 : 1, 1 : 2 and 1 : 3 inner-sphere comp…
Influence of preparation method on the characteristics of nickel/sepiolite catalysts
Two series of nickel catalysts supported on sepiolite have been prepared by impregnation and precipitation procedures, and the resultant materials characterised in their reduced states. FTIR of adsorbed CO and X-ray photoelectron spectroscopy (XPS) were used to study the surfaces of the materials and the degree of red…
Crystal structure and magnetic properties of K5.5Na1.5[PW10Cu2(H2O)2O38].13H2O. Substituted Keggin heteropolytungstates of the type PW10Cu2 containing exchange-coupled copper pairs
We report the structural and magnetic characterization of the crystalline product obtained from a solution containing Δ-(PW9O34)9- and Cu2+ ions (molar ratio 1/2) after standing a long period of time at room temperature. Three complementary techniques were used: X-ray diffraction, magnetic susceptibility measurements,…
Transformation Textures in Zirconia
The large shear component of the tetragonal‐to‐monoclinic transformation in zirconia causes a stress‐induced preferred orientation of the tetragonal and monoclinic variants. The resultant texture, which is dependent on the loading condition, has been analyzed in terms of stress assistance to transformation and experim…
Investigation of the surface activity of corrosion inhibitors by XPS and time‐of‐flight SIMS
Abstract X‐ray photoelectron spectroscopy (XPS), time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) and infrared spectroscopy (IR) have been used to study the interaction of two corrosion inhibitor blends of unknown composition with an iron surface. The analysis has precisely identified quaternary ammonium and…
Laser manipulation and assembling of polymer latex particles in solution
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLaser manipulation and assembling of polymer latex particles in solutionHiroaki Misawa, Keiji Sasaki, Masanori Koshioka, Noboru Kitamura, and Hiroshi MasuharaCite this: Macromolecules 1993, 26, 2, 282–286Publication Date (Print):January 1, 1993Publication History Published o…
Phase states: an analytic approach in the unit disc
Phase states are defined as eigenkets of the "exponential of the phase" operator E − . It is shown that they are SU(1, 1) Perelomov coherent states corresponding to the k = ½ representation. The properties of these states are discussed and used for the calculation of the phase distribution of coherent, squeezed and ph…
Relationship between segmental and chain dynamics in polymer melts as studied by dielectric spectroscopy
Broadband dielectric spectroscopy in the frequency range from 10 −5 Hz to 10 6 Hz is employed to study the relation between α-relaxation and normal mode process for oligomeric polyisoprene and polypropylene glycol samples of different molecular weight. It is shown that relaxation time of the α-relaxation has a much st…
The Development of Bearing Steels for Long Life Rolling Bearings Under Clean Lubrication and Contaminated Lubrication
Nearly ten years have passed since the LF-RH-CC process was adopted in the production of bearing steels. This process has become a common system for steelmakers, regardless of using EFs or BOFs as melting furnaces. The current cleanliness level of bearing steels shows a remarkable improvement when compared to that of…
Synthesis and crystal and molecular structure of (Et 4 N) 2 [Mn 10 O 2 Cl 8 {(OCH 2 ) 3 CMe} 6 ]·4MeOH·2H 2 O, a Mn II,III mixed-valence cluster with the decametallate core geometry
The reaction of (Et4N)2MnCl4 with MeC(CH2OH)3 in acetonitrile in the presence of atmospheric oxygen yields the oxoalkoxomanganese cluster (Et4N)2[Mn10O2Cl8{(OCH2)3CMe}6]·4MeOH·2H2O, a MnII,III mixed valence species exhibiting the decametallate core geometry, {M10O2L26}.
Measurement of Fabric Roughness by a Non- contact Method
The paper describes the method of using a laser sensor for the measurement of surface roughness and compares the results with those obtained by conventional contact methods. It goes further to study the anisotropy of roughness in ten plain woven fabrics.
Control of nucleation in the crystallization of lysozyme
This work investigates the influence of storage of lysozyme in solution on its crystallization. The crystallization of hen egg-white lysozyme exhibits a storage effect (aging) that depends on the length of time the lysozyme solution is stored, after dissolving from freeze-dried powder, before being brought to crystall…
Ionic dynamics in the rotator phase of n-alkylammonium chlorides (C 6 –C 10 ), studied by 1 H nuclear magnetic resonance, electrical conductivity and thermal measurements
1 H NMR, electrical conductivity and thermal measurements have been performed on the rotator phase of n-alkylammonium chlorides CnH2n+1 NH3Cl (n= 6–10). Rapid two-dimensional self-diffusion and uniaxial rotation of the long rod-like cations were observed in all salts studied by measuring 1H NMR spin–lattice relaxation…