Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSonochromic Effect in WO3 Colloidal SuspensionsPrashant V. Kamat and K. VinodgopalView Author Information Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556 Department of Chemistry, Indiana University Northwest, Gary, Indiana 46408Cite this: Langmuir 1996…
Magnetic viscosity has been investigated in four samples of melt-quenched and sintered NdFeB. The irreversible magnetization has been measured using two different techniques based on measurements of the DCD remanence curve and the reversible susceptibility. The difference in the value of /spl lambda/ (sometimes known…
High efficiency for selective ethene oxidation of catalysts containing PdCl2 and Mn2+ salts of heteropoly acids [H3 +xPMo12 –xVxO40(0 ⩽x⩽ 3)] supported on silica suggests a synergetic interaction between Pd2+ and Mn2+HPMoVx.
Films of poly(3-alkylthiophenes) on glass substrates were oxidized with acetonitrile solutions of AuCl 3 to yield electronically conductive materials containing the AuCl 4 - counterion, whereas oxidation with nitromethane solutions resulted in both AuCl 4 - -doped polymer and electroless deposition of metallic gold. X…
Thermoplastic elastomers, e.g., EPR, EPDM etc., are commonly used as modifiers of the ductility of PP, PE, HDPE or other general purpose thermoplastics. The objective of this study is to develop a high performance PP/HDPE/SBS polymer blend which possesses excellent toughness and strength equivalent to those of more ex…
Recovery of water with inorganic compounds in kraft black liquor was studied by pressure carbonation followed by different combinations of membrane separation processes. Experiments were carried out to observe the effect of carbonation on black liquor, in terms of conversion of lignin-bound alkali compounds into carbo…
EXAFS data for amorphous Ph3SbO are consistent with a structure in which trigonal-bipyramidal SbPh3O2 units share their axial oxygens to form a chain kinked at the oxygen atoms.
Extended X-ray absorption fine structure (EXAFS) spectroscopy has been used to characterise polyoxometalates of the type MmOyn– and XxMmOyn– in the solid state and in solution. The best fit to the low-temperature (80 K) niobium K-edge EXAFS of K7[HNb6O19]·13H2O was obtained with one terminal oxygen at 1.79 Å(M–Ot), fo…
Abstract A new organic UV nonlinear optical crystal urea‐(DL)tartaric acid [CO(NH 2 ) 2− (DL) C 4 H 6 O 6 ] (abbreviated as U(DL)T) is reported. Large single crystals have been grown from aqueous solution by the cooling method. They belong to the monoclinic space group P2 1 and the lattice parameters are: a = 7.6973 Å…
The Cu(II) and Fe(III) complexes of water-soluble tetrakis( N, N, N -trimethylanilinium)porphyrin (TTAP) and tetrakis( N -methylpyridyl)porphyrin (TMPyP) were placed within the interlayers of Ca(II)−montmorillonite through ion exchange. The free base forms of the porphyrins were also added to samples of Cu(II)− and Fe…
A previous investigation of EuVO4–BtVO4 binary system has indicated the existence of a solid-solution of Eu1–xBixVO4 up to x= 0.60, with a zircon-type structure. In this work we have reinvestigated the synthesis conditions, thus extending the upper limit to x= 0.74. X-Ray diffraction techniques associated with Raman a…
Self-assembled monolayers of alkanethiol derivatives have been used to control the anchoring of nematic films of alkylcyanobiphenyl (nCB) liquid crystals. Variation of the surface field, via the ω-functional group presented at the liquid crystal interface, has allowed us to explore both orientational wetting and ancho…
A typical hydrophilic monomer, acrylic acid (AAc), was graft polymerized onto poly (3-hydroxybutyrate) (PHB) and its copolymer poly (3-hydroxybutyrate-co-3-hydroxyvalerate) |P (HB-HV)| by 60Co-γ-rays preirradiation technique. Degree of grafting (Xg) of PHB was higher than that of the copolymer of 24 mol% HV content (2…
A scanning reference electrode technique (SRET) is described which is sufficiently stable and sensitive as to allow the automatic acquisition of time lapse isopotential contour maps of localised corrosion phenomena occurring in contact with molar concentrations of aqueous electrolyte. The SRET is demonstrated to be a…
Alkenyl succinic anhydride (ASA) gives sizing features efficiently to papersheet by being added to pulp suspensions as cationic ASA emulsions. Although the reactive structure of ASA is necessary for paper sizing, the previous paper revealed that alkenyl succinic acid (ASAcid), the hydrolyzed form of ASA, is the predom…
The concentration of the product nitric oxide, [NO(X 2 Π r )] product, formed in the title reactions is measured as a function of the vibrational energy distribution in the for v‘ ≤ 6 in a rapidly pumped discharge-flow reactor at ∼298 K and a total pressure of ∼2 Torr using laser-excited fluorescence techniques. For t…
A pH-dependent X-ray absorption fine structure (XAFS) study has been undertaken to provide a structural interpretation of the spectroscopic properties of the Met121 Glu mutant of azurin from Pseudomonas aeruginosa (Azp). Ligand binding studies have been carried out to investigate the effect of the cavity formed at the…
29 Si NMR spectrometry has been used to determine the number molecular weight distribution of polymerization degrees of a system of oligomers formed in the sol-gel polycondensation of tetraethoxysilane (TEOS). On the basis of identification of the oligomers, monitoring of the concentration changes during the initial p…
A fine pore characterization method for less-crystalline porous solids has been applied to activated carbons. In the analysis, the microporosity of the solid was classified into effective micropores and inaccessible pores, depending upon the accessibility of the pore to an N2 molecule at 77 K. The volume fraction of e…
This paper presents the design, analysis, and application of permanent magnets in a hysteresis motor with a view to improve the overall performance of such motors. The novel rotor consists of 36% cobalt steel alloys with neodymium boron iron permanent magnets. This hybrid design combines the advantageous performance f…