Materials Literature
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First-principle electronic structure calculations are used to describe the magneto-optical properties of MnBiAl alloys as a function of the Al concentration. The calculated Kerr rotation and ellipticity are in good agreement with the experimental data for MnBi. Due to lack of good structural information, the magneto-o…
The compound tetrakis( tert -butylammonium)- cyclo -tetrametavanadate(V), the first oxovanadate salt isolated from aqueous solution which contains a discrete unprotonated [V 4 O 12 ] 4 - anion, undergoes an irreversible, reconstructive, continuous, and heterogeneous phase transition in the solid state by means of a nu…
Single crystal X-ray and neutron diffraction is essential for determining occupancies, positional as well as static and dynamic displacement parameters in crystalline matter by measuring Bragg, satellite or diffuse reflections. In our contribution a new low-temperature high pressure cell for neutron single crystal dif…
Several tellurometalates of the general formula [MTe(7)](n)()(-) (n = 2, 3) have been isolated as salts of organic cations by reaction of suitable metal sources with polytelluride solutions in DMF. The [HgTe(7)](2)(-) anion has the same structure in both the NEt(4)(+) and the PPh(4)(+) salts except for a minor change…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTRemoval of Acetal, Silyl, and 4,4'-Dimethoxytrityl Protecting Groups from Hydroxyl Functions of Carbohydrates and Nucleosides with Clay in Aqueous MethanolJun-ichi Asakura, Morris J. Robins, Yukihiro Asaka, and Tong Hei KimView Author Information Departments of Biochemistry and…
Accelerating irradiation growth has been reported for several zirconium alloys with a range of metallurgical states during high-temperature tests in fast-breeder reactors (673 to 723 K) for annealed Zircaloys in thermal test reactors at power reactor temperatures (523 to 623 K) and in power reactor core components fab…
Magnetic materials exhibiting gigantic magnetostriction, especially Terfenol, are currently being widely used in fine positioning and active vibration damping devices. By involving accurate magnetostriction models during design stages, precision of such devices may be significantly enhanced. In this paper a straight-f…
Phloroglucinol 4, hydroquinone 5 and naphthalene-2,6-diol 6 react with the monomer 2, activated either by 1,3-dicyclohexylcarbodiimide (DCC) or as its acid.chloride 3. Hydrogenolysis of the benzyl protecting groups, followed by repetition of these procedures leads, divergently, to three series of analytically pure ary…
It is shown that polyester fibres are able to absorb water more easily by making a grooved and/or a non-grooved hollow in a fibre. The effect of water absorbency becomes larger with an increase in the ratio of space to polymer in the fibre cross-section if the yarn and fabric structures are the same. The effect is esp…
After amputation of a salamander limb, the extracellular matrix undergoes remodeling. The extracellular matrix that maintains the differentiated state of limb tissues is broken down and replaced by an extracellular matrix essential for dedifferentiation and blastema formation. We used monoclonal antibodies in immunohi…
A general method is proposed for the molecular level characterization of relaxation and transformation processes in polymer crystals mediated by propagation of conformational imperfections. The proposed approach combines a definition of the defect ensemble, in terms of the extent and boundary conditions of the defect…
The precipitation mechanisms and kinetics in three titanium alloys of different ß-phase stabilities - the ß-rich a α+β titanium alloy Ti-6Al-2Sn-4Zr-6Mo and the near ß-titanium alloys Ti-5Al-2Sn-2Cr-4Mo-4Zr-1Fe(ß- CEZ) and Ti-10V-2Fe-3Al - were investigated by isothermal holding in the α+β field after a ß-solution tre…
The interfacial composition and kinetics of interfacial mixing of two polymers that exhibit strong exothermic interactions, poly( N, N‘ -dimethylethylenesebacamide) (mPA) and the lithium salt of a lightly sulfonated polystyrene ionomer containing 7.4 mol % sulfonate groups (Li−SPS), were characterized by neutron refle…
A preparation is described which affords good yields of cyclic poly(oxyethylene)s with narrow chain length distributions and number-average molar masses in the range 1000–20 000 g mol–1.
Aniline is photopolmerized by illuminating a bilayer electrode composed of tris(2,2′-bipyridyl)ruthenium complex [Ru(bpy)32+] incorporated Nafion film and methylviologen pendant poly(siloxane)(PSiO-MV2+) film in aniline solution in the presence of N-phenyl-p-phenylenediamine (PPD); the role of PPD on photopolymerizati…
A general synthetic approach to rationalize the solution preparative chemistry of oxovanadium phosphates containing organic species as structural directing agents is presented. Careful attention is payed to the hydrolysis and condensation processes involving the ionic species in solution, and a simple restatement of t…
We present a simple analytical method to study the deformation behavior of a grafted melt polymer brush. We calculate the change in the free energy associated with (1) small-amplitude deformations of the free surface, (2) nonuniformity in the areal density of grafted chains, and (3) deformations of the grafting surfac…
The reaction of the bicyclic cryptand 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosan-5,6,14,15,22,23-hexone (1) with copper(II) leads to the dinuclear complex {1,10-bis(2-aminoethyl)-1,4,7,10,13,16-hexaazacyclooctadecane-5,6,14,15-tetronato(4-)}dicopper(II) (2). 2 crystallizes in the triclinic system (space group…
An X-ray absorption study at the vanadium K edge has been performed on the LixV2O5(x= 0–0.78) system. For this, an electrochemical cell has been designed in order to allow in situ measurements. The spectra were recorded every 0.03 Li (mol V2O5)–1 using the same sample left in the X-ray beam. The study of the XANES spe…
A phase transition from Ca(OH)2 I (portlandite) to Ca(OH)2 II at high pressure and temperature has been confirmed, using in situ x-ray diffraction in a multianvil high pressure device (DIA). The structure was determined at 9.5 GPa and room temperature from data collected after heating the sample at 300°C at 7.2 GPa in…