Micellar catalysis and inhibition
Abstract
Materials Literature
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Effect of permittivity matching on the flashover of solid/liquid interfaces
The flashover characteristics of pressboard, polycarbonate, polyphenylene oxide, Permali and Perspex have been measured under ramp function pseudoimpulse voltage application conditions in clean, dry, degassed liquids with permittivities varying over the range εr = 2–5. The solid materials were tested in the form of 5×…
Nyerereite: a new volcanic carbonate mineral from Oldoinyo Lengai, Tanzania
Nyerereite has the idealized composition (Na 0.82 K 0.18 ) 2 Ca(CO 3 ) 2 with significant minor substitution of SO 4 2− , PO 4 3− , F − for CO 3 2− , optical properties α = 1.5112, β = 1.5333, γ = 1.5345, 2 V α = 29°, and density 2.541 g cm −3 . The average unit cell has space group Cmc 2 1 , dimensions a = 5.044, b =…
Colored sulfur species in EPD-solvents
Conference International Conference on Non-Aqueous Solutions, International Conference on Non-aqueous Solutions, ICNAS, Non-aqueous Solutions , Fifth, University of Leeds, England, 1976-07-05–1976-07-09 Published Online: 2009-01-01 Published in Print: 1977-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
The structure of NaTaO3by X-ray powder diffraction
The structure of NaTaO3 has been determined from X-ray powder diffraction spectra by measuring the intensities of the difference reflexions caused by the deviations from the ideal cubic perovskite structure. The structure is compared with that determined on the basis of single-crystal measurements.
Oxygen Stoichiometry in LaMn 1‐x Cu x O 3+y by Thermogravimetry
Thermogravimetry in reducing atmospheres was used to study the oxygen Stoichiometry of several Cu‐substituted lanthanum manganates. The oxygen content of the samples at various levels of reduction (to La 2 O 3 , MnO, and Cu) was calculated from the gravimetric data. Freeze‐dried samples prepared by firing at 1100°C in…
Fabrication of Zirconium Alloys into Components for Nuclear Reactors
Over 80 percent of the world's annual output of zirconium is fabricated into components for nuclear reactors. In 1976 the CANadian Deuterium Uranium (CANDU) power reactor program will require nearly 500 Mg of zirconium and by 1986 the requirement will have risen to nearly 800 Mg. Most of this is fabricated into tubes…
Bis-porphyrin derivatives. Part 1. Reaction of meso-hydroxymethylporphyrinatometal derivatives with acids
Treatment of the nickel(II) or copper(II) derivative of octaethyl-meso-hydroxymethylporphyrin with sulphuric acid in dimethyl-formamide or -acetamide gives mainly the meso,meso′-ethylenebis(porphyrinatometal) derivative by reactions involving electron transfer from the metal, In the absence of metal, only disproportio…
Linear and bilinear magnetoelectric effects in magnetically biased magnetite (Fe3O4)
It is shown that if a ferromagnetic crystal is biased by means of a static magnetic field ${\stackrel{\ensuremath{\rightarrow}}{\mathbf{H}}}_{0}$, then the electric field dependence of the macroscopic magnetic anisotropy energy gives rise to linear as well as to two kinds of bilinear magnetoelectric effects. When expr…
The Canadian Spent Fuel Storage Canister: Some Materials Aspects
Concrete canisters for interim dry storage of spent, irradiated Canadian Deuterium Uranium (CANDU) fuel are being developed by Atomic Energy of Canada Limited. The canisters are designed to contain fuel safely for periods of 50 to 100 yr in carbon steel baskets sealed inside a steel- and lead-lined concrete shield. A…
Chemical modification of polymers. Borohydride reducing agents derived from anion exchange resins
Exchange of quaternary ammonium type anion exchange beads with NaBH4 leads to useful reducing agents possessing the advantage of easy work-up.
Dimensional Stability of Fused Silica, Invar, and Several Ultra-low Thermal Expansion Materials
We have measured length change vs time for several low thermal expansion materials maintained in evacuated environments at constant temperature (near 300 K). Materials were two types of fused silica, Cer-Vit, ULE, Zerodur, Invar, and super Invar. Δ L/L was measured over a period of 170 days to a precision of two to th…
Fracture Properties of Polycrystalline Lithia‐Stabilized β “‐ Alumina
The critical stress‐intensity factor, K 1C , and the fracture strength, σ f , have been investigated on both hot‐pressed and sintered lithia‐stabilized β ”‐alumina. The hot‐pressed material possessed a strong preferred orientation with many of the basal planes aligned perpendicular to the direction of hot‐pressing. Bo…
The Corrosion and Oxidation of Metals
"The Corrosion and Oxidation of Metals." British Corrosion Journal, 12(1), p. 5
Triassic blueschist from northern California and north-central Oregon
Research Article| November 01, 1977 Triassic blueschist from northern California and north-central Oregon Preston E. Hotz; Preston E. Hotz 1U.S. Geological Survey, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Marvin A. Lanphere; Marvin A. Lanphere 1U.S. Geological Survey, M…
V. One‐Electron Density Functions and Many‐Centered Finite Multipole Expansions
Abstract The one‐electron density function, ρ( r ), (in principle deduced from elastically scattered X‐ray intensities) is the probability distribution function of an electron, averaged over the positions of all other electrons. A partitioning of ρ( r ) into constituent parts is an intellectual exercise that does not…
High-temperature electrical conductivity and point defects in lead zirconate-titanate
The electrical conductivity and thermoelectric power of lead zitconate-titanate Pb(Ti0.47Zr0.53)O3 (PZT) have been studied at temperatures up to 1000°C in gaseous ambients with controlled partial pressures of both volatile components: lead oxide and oxygen. The experimental results show the small polaron conduction me…
Preparation, Structure, and Selected Catalytic Properties of the System LaMn 1‐x Cu x O 3‐y
Samples of LaMn 1‐x Cu x O 3‐y in the range 0≤x≤0.8 were prepared from freeze‐dried solutions of the nitrates. Samples with x≤0.6 were single‐phase perovskites. At higher values of x , the samples contained La 2 CuO 4 and CuO as well as the perovskite phase. Samples of LaMn 1−x ,Cu x ,O 3−y supported on ceramic monoli…
Combustion of PVC
The thermal decomposition and combustion mechanisms of PVC are examined.
Reduction of nitro-compounds
Nitro-compounds were reduced to amines in high yields by using palladium, platinum, or rhodium metal catalyst with formic, phosphinic, or phosphorous acid. With formic acid, nitro-compounds containing fluorine were reduced but not those containing chlorine, bromine, or iodine. With the other acids, nitro-compounds con…