Spin exchange coupling in asymmetric heterodinuclear complexes containing the .mu.-oxo-bis(.mu.-acetato)dimetal core
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Cyclic Plasticity and Low Cycle Fatigue Life of Metals
1. Introduction. 2. Stress and Strain in Cyclic Loading. Monotonic stress-strain curve. Stress-strain relationship in cyclic loading. Hysteresis loop. Cyclic hardening/softening curves. Cyclic stress-strain curve. 3. Cyclic Plasticity and Microstructure. Metals and simple alloys with f.c.c. structure. Metals and singl…
Mott electron polarimetry
Electron polarimeters based on Mott scattering are extensively used in atomic and molecular, solid state, nuclear, and high-energy physics. This use stems from the increasing realization that much additional information concerning many physical processes can be obtained through spin-dependent measurements. In this rev…
Reversible luminescence quenching of porous silicon by solvents
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible luminescence quenching of porous silicon by solventsJeffrey M. Lauerhaas, Grace M. Credo, Julie L. Heinrich, and Michael J. SailorCite this: J. Am. Chem. Soc. 1992, 114, 5, 1911–1912Publication Date (Print):February 1, 1992Publication History Published online1 May…
Adequacy of lumped parameter models for SCR reactors with monolith structure
Abstract Two‐and one‐dimensional steady‐state isothermal mathematical models of monolith reactors for selective catalytic reduction (SCR) of NO x by NH 3 are compared for circular, square and triangular geometry, as well as for linear and Rideal kinetics. Solutions for the two‐dimensional model demonstrate that, as th…
The abinitio model potential method. Cowan–Griffin relativistic core potentials and valence basis sets from Li (Z = 3) to La (Z = 57)
A comprehensive tabulation of Cowan–Griffin relativistic abinitio core model potentials and valence basis sets corresponding to the Cowan–Griffin abinitio model potential method is presented. It includes those for the elements from Li (Z = 3) to La (Z = 57), the alkaline M + and alkaline earth M 2+ cations, and for th…
Direct determination of proton positions in D-Y and H-Y zeolite samples by neutron powder diffraction
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect determination of proton positions in D-Y and H-Y zeolite samples by neutron powder diffractionMirjam Czjzek, Herve Jobic, Andrew N. Fitch, and Thomas VogtCite this: J. Phys. Chem. 1992, 96, 4, 1535–1540Publication Date (Print):February 1, 1992Publication History Publi…
Enzymatic catalysis and dynamics in low-water environments.
Enzymes suspended in organic solvents represent a versatile system for studying the involvement of water in enzyme structure and function. Addition of less than 1% (vol/vol) water to tetrahydrofuran containing 1 M 1-propanol leads to a substantial increase in the transesterification activity of subtilisin Carlsberg (f…
Neutron diffraction studies of liquid and crystalline trilaurin
Neutron diffraction has been employed to investigate the structure of trilaurin in both liquid and crystalline states. The combination of long‐wavelength (4.5 Å) neutrons and wide angular ranges of detection (∼6<2θ[ o ]<∼100) per mitted a large range of momentum transfer to be acceessed (∼0.15<Q[Å −1 ]<∼2)…
Barium and Strontium Sulfate Solid-Solution Scale Formation at Elevated Temperatures
Summary Barium sulfate scale occurrence is a severe production problem in North Sea oil operations. Barium sulfate is often accompanied by strontium sulfate to form a completely mixed scale called (Ba, Sr)SO4 solid solution. This paper describes a laboratory study carried out at 70°C to examine (Ba, Sr)SO4 solid-solut…
The role of triton X-100 as an adsorbate and a molecular spacer on the surface of silver colloid: a surface-enhanced Raman scattering study
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe role of triton X-100 as an adsorbate and a molecular spacer on the surface of silver colloid: a surface-enhanced Raman scattering studyPavel Matejka, Blanka Vlckova, Jiri Vohlidal, Petr Pancoska, and Vladimir BaumrukCite this: J. Phys. Chem. 1992, 96, 3, 1361–1366Publica…
High Temperature Thermomechanical Behavior of Carbon-Phenolic and Carbon-Carbon Composites, I. Analysis
The high temperature behavior of carbon-phenolic and carbon-carbon composites was investigated. Models were developed which describe the thermal and me chanical responses of such composites when rapidly heated to high temperatures. On the basis of the models, a computer code was written that provides the temperature a…
BLAF - a robust program for tracking out admittable Bravais lattice(s) from the experimental unit-cell data
BLAF represents an original computer program to devise the Bravais lattice symmetry or possible pseudo-symmetries (with allowance for large axial and angular distortions) of an experimental unit cell. The matrix approach to symmetry formulated by Himes & Mighell [Acta Cryst. (1987). A43, 375–384] is further developed…
Dielectric constants of silicate garnets and the oxide additivity rule
The dielectric constants and dielectric loss values of a series of garnets were measured at l MHz using a two-terminal method and empirically determined edge corrections. The results are five intermediate pyrope-almandine samples, k'=11.96-12.35; spessartine, k'=11.65; two andradite samples, k'=10.53-10.59; and three…
Correcting soil acidity of a highly weathered Ultisol with chicken manure and sewage sludge
The seriousness of soil acidity and the unavailability of “conventional”; liming materials in many developing countries necessitate a search for alternatives. With this goal in mind, the liming potential of two organic manures was investigated. The investigation was conducted in the greenhouse, using a highly weathere…
Materials derived from biomass/biodegradable materials.
Interest in biodegradable plastics made from renewable resources has increased significantly in recent years. PHBV (polyhydroxybutyrate-polyhydroxyvalerate) copolymers are good examples of this type of materials. This paper provides an overview of the manufacturing process, properties, biodegradability, and applicatio…
Surface vibrational modes of silanol groups on silica
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface vibrational modes of silanol groups on silicaB. A. Morrow and A. J. McFarlanCite this: J. Phys. Chem. 1992, 96, 3, 1395–1400Publication Date (Print):February 1, 1992Publication History Published online1 May 2002Published inissue 1 February 1992https://pubs.acs.org/do…
Pseudomonas putida KT2442 cultivated on glucose accumulates poly(3-hydroxyalkanoates) consisting of saturated and unsaturated monomers
The biosynthesis of poly(3-hydroxyalkanoates) (PHAs) by Pseudomonas putida KT2442 during growth on carbohydrates was studied. PHAs isolated from P. putida cultivated on glucose, fructose, and glycerol were found to have a very similar monomer composition. In addition to the major constituent 3-hydroxydecanoate, six ot…
Ferroelectric polymers
In the early 1970s it became clear that the polymer polyvinylidene fluoride is ferroelectric. There have been extensive studies of its properties and of the properties of copolymers of vinylidene fluoride with tri- or tetra-fluoroethylene. This work has led to a fairly complete understanding of the ferroelectric and r…
Effects of Layer Charge, Charge Location, and Energy Change on Expansion Properties of Dioctahedral Smectites
Abstract Expansion properties often homoionic smectites that differed in amount and location of layer charge were examined by X-ray powder diffraction analysis at various relative humidities, or after glycerol or ethylene glycol solvations. Except for K-samples with glycerol solvation, and Na- and Ca-samples with ethy…