‘Magnesium products design’
(1988). ‘Magnesium products design’. British Corrosion Journal: Vol. 23, No. 3, pp. 154-156.
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Natural contamination test of insulators with DC voltage energization at inland areas
Results of tests for natural contamination of insulator strings in inland areas are discussed. Natural exposure tests with -280 kV DC voltage energization were carried out for 5 years. The following results were obtained: (1) The amount of contaminant on the bottom surface increased with the length of the exposure per…
Supersaturation mechanism of drugs from solid dispersions with enteric coating agents.
The crystallization behavior of drugs from supersaturated solutions containing carboxymethylethylcellulose (CMEC) was investigated to clarify the mechanism of supersaturation phenomena from solid dispersions with enteric coating agents in JP XI 2nd fluid (pH 6.8). Nifedipine, griseofulvin and spironolactone were used…
Theory of ferromagnetic hysteresis: evaluation of stress from hysteresis curves
A recent extension of the theory of ferromagnetic hysteresis to include the effects of a constant applied stress uses an effective field H/sub sigma / that depends on the stress and the rate of change of magnetostriction with magnetization. The extended theory is used here to derive a particularly simple expression fo…
Utilization of refractory cellulosic carbon derived from Spartina alterniflora by the ribbed mussel Geukensia demissa
The ab~lity of the ribbed mussel Geukensia demissa (Dillwyn) to ingest and absorb refractory lignocellulosic carbon was evaluated using 14C-radiotracer techniques. Mussels were maintained in a simulated tidal cycle of 6 h submergence and 6 h exposure and were fed on [14C]lignocellulose during the first submergence per…
Aquanonadecatungstodiphosphate(14–) polyanion, [P 2 W 19 O 69 (OH 2 )] 14– : X-ray crystallographic structure of its potassium salt, chemical relationships in the tungstophosphate system, and conversion into the diaquaicosatungstodiphosphate [P 2 W 20 O 70 (OH 2 ) 2 ] 10–
The crystal structure of K14[P2W19O69(OH2)]·24H2O has been determined [space group Fddd, a= 28.800(3), b= 38.143(8), c= 32.005(7)Å, Z= 16, R= 0.048 for 3 108 reflections with I > 3σ(I)]. The anion has crystallographic symmetry 2, very close to a C2v point group symmetry. Two α-A-PW9O349– units are linked through one W…
Calcium carbonate formation byDeleya halophila:Effect of salt concentration and incubation temperature
The precipitation of calcium carbonate by strains of the moderately halophilic species Deleya halophila was studied. The influence of salinity and temperature on the formation and type of crystals formed by these strains was also investigated. All strains tested were capable of precipitating CaCo3. Low temperature and…
Effect of Steel Manufacturing Processes on the Quality of Bearing Steels
Description Twenty-two papers address: quality requirements for better bearing steels; new methods to evaluate quality of better bearing steels; and new processes to produce better bearing steels.
Development of shape-memory alloy actuators. Performance assessment and introduction of a new composing approach
A servo actuator using shape-memory alloy (SMA actuator), which performs special functions not found in conventional actuators, is expected to be a new driving source for future robots. This paper evaluates its performance and discusses the fundamental issues in designing such actuators. Being driven by the thermal ma…
Stereospecific epoxidation by air of cholest-5-ene derivatives catalysed by a ruthenium porphyrin
A ruthenium porphyrin catalyses the epoxidation of several cholest-5-ene derivatives by air in high yield and with nearly complete β-stereospecificity; C-3-unprotected cholesterol is unaffected, but cholesteryl acetate gives nearly pure (>99%) 5β,6β-epoxide.
The Microstructure of Spray-Dried Microcapsules
A newly developed technique for SEM sample preparation has been applied in the study of the effects of process parameters on the microstructure of gum arabic spray-dried microcapsules. The technique, that employs embedding in an apolar resin and partial polymerization makes it possible to simultaneously observe the in…
High-resolution solid-state carbon-13 NMR spectra of porphine and 5,10,15-20-tetraalkylporphyrins: implications for the nitrogen-hydrogen tautomerization process
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-resolution solid-state carbon-13 NMR spectra of porphine and 5,10,15-20-tetraalkylporphyrins: implications for the nitrogen-hydrogen tautomerization processLucio. Frydman, Alejandro C. Olivieri, Luis E. Diaz, Benjamin. Frydman, Frederick G. Morin, Charles L. Mayne, Davi…
A mathematical model for solute redistribution during dendritic solidification.
To quantify the solute redistribution during solidification, an approximate solution of the Brody-Flemings model of dendritic solidification has been derived on the assumption of parabolic solidification and a constant partition ratio, and compared with an exact solution of the model. It has been shown that the approx…
Effect of Cold Work on the Stress Corrosion Cracking of Nonsensitized AISI 304 Stainless Steel in High-Temperature Oxygenated Water
The effect of cold work on the stress corrosion cracking (SCC) of solution-annealed (nonsensitized) AISI(1) 304 stainless steel (SS) in 288 C oxygenated pure water was studied utilizing creviced bent beam (CBB) tests. The SCC susceptibility increased with an increased degree of cold work, especially when above 40%. Th…
Direct conversion of benzene to hydroquinone. Cooperative action of copper(I) ion and dioxygen
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect conversion of benzene to hydroquinone. Cooperative action of copper(I) ion and dioxygenSotaro Ito, Atsutaka Kunai, Hiroshi Okada, and Kazuo SasakiCite this: J. Org. Chem. 1988, 53, 2, 296–300Publication Date (Print):January 1, 1988Publication History Published online1…
A Rapid and Simple Method for Electron Microscopy of Paraffin-Embedded Tissue
A new rapid and simple method for electron microscopy of paraffin-embedded material is described. The paraffin-embedded tissue is deparaffinized in xylene, stained in a 0.01% toluidine blue/absolute ethanol solution, infiltrated in a propylene oxide/resin mixture, and embedded in epoxy resin. This quick method, which…
Thermoviscoplastic Nonlinear Constitutive Relationships for Structural Analysis of High-Temperature Metal Matrix Composites
A set of thermoviscoplastic nonlinear constitutive relationships (TVP-NCR) is presented. This set is unique and has been developed mainly for application to high-temperature metal matrix composites (HT-MMC) and is applicable to thermal and mechanical properties. Formulation of the TVP-NCR is based at the micromechanic…
Solid-State NMR of H3PW12O40·nH2O and H3PW12O40·6C2H5OH
Abstract High-resolution solid-state 1H and 31P NMR revealed that there were at least three different states for protons of H3PW12O40·nH2O; (i) protons present in highly hydrated samples, (ii) protonated water which is hydrogen-bonded to terminal oxygen, W = O···H+ (H2O)2 (n \doteqdot 6), and (iii) proton which is dir…
Diffusive anion exchange in polypyrrole films
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiffusive anion exchange in polypyrrole filmsLarry S. Curtin, Glenn C. Komplin, and William J. PietroCite this: J. Phys. Chem. 1988, 92, 1, 12–13Publication Date (Print):January 1, 1988Publication History Published online1 May 2002Published inissue 1 January 1988https://pubs…
On the Temperature Dependence of Plasma Polymerization
Abstract A simple model is developed to explain the measured temperature dependence of the growth rate of polymerfilms in a C 6 H 6 ‐Ne‐glow discharge. The negative Arrhenius‐behaviour obtained that means a decreasing growth rate with increasing temperature — is determined by an adsorption‐desorption‐equilibrium of th…