Crystal structure of dipotassium tetrathiomolybdate, K2MoS4
RgtfF) = 0.023, wR Kf (F 2 ) = 0.054, T= 153 K.
Materials Literature
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Adsorption and Vibration of Carbon on Low Index and Defect Nickel Surface
Abstract The 5‐parameter Morse potential of interaction between carbon and the nickel surface was constructed. We studied the adsorption and vibration of carbon atom on Ni(100), Ni(110) and Ni(111) single crystal low index surfaces and obtained the data of adsorption sites, adsorption geometry, binding energy and eige…
Investigation of photochromic cluster systems based on molybdenum oxides by ESR spectroscopy
The electron-spin resonance (ESR) spectra of cluster polyoxometalate systems—a finely dispersed powder of the (NH 4 ) 6 [Mo 7 O 24 ]-citrie acid complex, molybdic acid, and molybdenum(VI) oxide—are investigated. The initial samples are colored under exposure to ultraviolet (UV) irradiation (photochromic effect) and th…
The Growth of K2Al2B2O7 (KAB) Crystal by Modified Middle Seeded Solution Growth (MSSG) Method
Among many nonlinear optical (NLO) crystals, Sr 2 Be 2 B 2 O 7 (SBBO) and structurally related crystals is promising for the generation of UV and vacuum-UV (VUV) light. However, high viscosity, volatility and the platy growth habit have limited the growth of thick crystals for actual NLO applications. The growth of th…
Inhibition of phosphofructokinases by copper(II)
The biochemical inhibition by Cu2+ on eight phylogenetically and biochemically different phosphofructokinases (PFKs) was investigated. The enzymes screened included representatives from thermophilic and mesophilic bacteria, a hyperthermophilic archaeon and a eukaryote, covering all three phosphoryl donor subtypes (ATP…
Field solution in polluted insulators with non-symmetric boundary conditions
A finite difference (FD) method to calculate the electric field in polluted insulators with asymmetric boundary conditions is proposed. The method is based on neglecting the displacement currents that circulate through the porcelain and through the air, in comparison with the conduction currents that circulate over th…
Europium(III)-N,N′-Ethylenebis(l-amino acid) Complexes as New Chiral NMR Lanthanide Shift Reagents for Unprotected α-Amino Acids in Neutral Aqueous Solution
Abstract Three N,N′-ethylenebis(l-amino acid) ligands have been obtained simultaneously with three α,α′-(1,4-piperazinediyl)bis[(S)-alkanoic acid] and four N,N′-ethylenedipeptide products, by reacting a mixture of l-histidine methyl ester and l-aspartic acid dimethyl ester with glyoxal in the presence of sodium cyanot…
PD characteristics in an air-filled void at room temperature under superimposed sinusoidal voltages
Partial discharge in an artificial air-filled void under superimposed sinusoidal voltages is investigated at room temperature in order to clarify the effect of voltage superposition. The applied voltage waveform is composed of a 60 Hz fundamental sinusoidal wave and a high frequency sinusoidal wave of 300 Hz to 1.2 kH…
Disprsion in high viscosity ratio polyolefin blends
Abstract The dispersion of polyethylene and polyropylene in a polypropylene matrix using a co‐rotating twin screw extruder has been investigated. Poymer pairs were selected to study the effect of viscosity ratio, defined as the viscosity of the minor component over that of the matrix, in the range 0.1 to 900. The disp…
Commercial Heterogeneous Catalysis
Preview this article: Commercial Heterogeneous Catalysis, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/pmr/45/2/pmr0045-0083-1.gif
Substituent-introduction of “hard” polarization characteristics in “soft” Pb(BIBII)O3–PbTiO3 ferroelectric ceramics
The polarization versus field (P–E) characteristics of modified Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT) and Pb(Sc1/2Nb1/2)O3–PbTiO3 (PSN–PT) ceramics has been investigated for compositions close to the morphotropic phase boundary. Investigations were performed for various types of lower valent substituents on the B-site cati…
Crystal structure of dibismuth selenium pentoxide, Bi2SeO5
Bi 2 0 5 Se, orthorhombic, Abm2 (No. 39), a = 11.425(2) , b = 16.244(3) , c = 5.487(2), V= 1018.3 3 ,Z= 8, RoJF) = 0.038, wrefiF 2 ) = 0.100, T= 293 K.
Corrosion des surconteneurs de déchets, cas d'un surconteneur en acier faiblement allié
Le concept de stockage developpe par l'ANDRA impose une duree de vie de 1000 ans pour ce surconteneur sachant que le processus majeur de degradation est la corrosion. Pour assurer cette duree de vie, il est necessaire d'evaluer l'epaisseur du metal qui sera perdu par corrosion generalisee. Pour cela, nous avons mene u…
IEEE Power Engineering Review
The authors describes CO/sub 2/ reduction/removal possibilities for thermal power plants, which include decarbonization of fuel prior to combustion, combustion in O/sub 2//CO/sub 2/ atmospheres and condensation of CO/sub 2/, and tail-end capture.
Secondary Phases in Hot‐Pressed Aluminum‐Boron‐Carbon–Silicon Carbide
Silicon carbide hot‐pressed with aluminum, boron, and carbon as sintering aids (ABC–SiC), was studied by transmission electron microscopy. Both grain‐boundary films and inclusions were prevalent in this material. The present study characterized the inclusions located in triple‐junctions, grain boundaries, and the inte…
The manganese complex of 2,3,7,8,12,13,17,18-octaphenylporphyrin as epoxidation catalyst
The 2,3,7,8,12,13,17,18-octaphenylporphyrinato manganese(III) chloride was prepared and its behaviour as epoxidation catalyst was studied. The role of the phenyl substituents in the ß-pyrrolic positions concerning the stability of the catalyst to the reaction conditions and the efficiency and selectivity of the oxidat…
Conductive rubbers made by adding conductive carbon black to EVA, EPDM, and EVA–EPDM blends
Electrically conductive rubbers have been prepared by the incorporation of conductive carbon black into ethylene/vinyl acetate (EVA) copolymers, ethylene/propylene/diene monomer (EPDM) terpolymers, and a 50 : 50 EVA–EPDM blend. The electrical and mechanical properties of these composites have been studied. The percola…
The LT phase of Cs3Bi2I9
Abstract The low temperature (LT) modification of Cs 3 Bi 2 I 9 has been refined to R ( F ) = 0.055 on the basis of X-ray diffraction measurements at T = 130 K from a twin crystal with six fractions connected by 3-fold axis and m -planes symmetry operations. Data were collected on a KM4CCD diffractometer; Mo K α -radi…
Antifungal activities of pelargonic and capric acid onMicrosporum gypseum
The inhibitory effects of pelargonic and capric acid on Microsporum gypseum were examined. Solid and liquid Sabouraud glucose media containing different concentrations of pelargonic and capric acid were separately prepared and inoculated with the suspension of mycelium and spores of M. gypseum and incubated at 25 degr…
Reactions in multiindexed continuous mixtures: Catalytic cracking of petroleum fractions
Abstract The classic breakage problem is a population‐balance problem using first‐order kinetics and product distribution rules over a multidimensional continuum, mathematically expressed as linear integrodifferential equations for the multiindexed frequency distribution functions of entities. To model the catalytic c…