Materials Literature
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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…
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…
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…
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,…
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…
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…
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 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…
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…
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…
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}.
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.
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…
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…
The role of boron compounds on the flame retardance characteristics of unmodified as well as surface-modified wood fiber-filled polypropylene composites is discussed. The effect of three different additives, m-phenylene bismaleimide (BMI), BMI-modified polypropylene (BPP), and a mixture of borax and boric acid, on the…
By introducing a head-group energy of adsorption with the grafting surface, we simulate the grafted polymer layer including chain exchange with the bulk solution using the bond-fluctuation model. The kinetics of adsorption is relatively rapid in short times and becomes much slower in later time as the layer is formed.…
Previous measurements of concentration gradients formed in long columns of supersaturated glycine solutions [1] indicate that small amounts of impurities, such as valine, can lead to an increase in the magnitude of the gradient. This might indicate that the impurity enhances the degree of cluster formation. The concen…
Acid-activated clays (montmorillonites) have been cation-exchanged with aluminium chloride pentahydroxide dihydrate (aluminium chlorhydrate, ACH) solutions of different concentrations to yield expanded materials. Various Al:clay (a/c) ratios have been used. The effect of changing the degree of polymerisation of the pi…
The glass-forming tendency of a large number of organic liquids of varying molecular shapes has been examined using differential scanning calorimetry (DSC) and a sharp distinction between spherical and non-spherical molecular liquids as regards their glass-forming efficiency is observed. Calorimetric evidence has been…
Abstract The new misfit layer compound (LaSe) 1.14 (NbSe 2 ) 2 has been synthesized from the elements at 1050‐ and its structure has been determined by a composite approach. The structure has an alternating stacking sequence of [LaSe] and two [NbSe 2 ] layers along the c direction. The misfit of the two different laye…