How to Choose Insulators for Polluted Areas
As a part of the research program on the behavior of polluted insulators, the mechanism of flashover due to contamination has been analysed in a recent publication [1].
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Observer error in skinfold thickness measurements.
Two sets of skinfold measurements were made on 21 subjects by three observers using a Harpenden caliper. One of the observers had several years’ experience of the technique, while the other two were relatively inexperienced. Measurements were made at the biceps, triceps, subscapular and suprailiac sites. In one set o…
Factors Affecting Cellulolysis by Ruminococcus albus
The factors influencing the digestion of pebble-milled cellulose by enzymes were studied by using several strains of Ruminococcus albus including a mutant characterized by a more eccentric location of its colony in the clearing produced by digestion of the cellulose in the thin layer lining the wall of a culture tube.…
Chlorinated polyethylene modification of blends derived from waste plastics Part I: Mechanical behavior
Abstract Recycling of waste plastics as a blend of generic types is attractive since a difficult separations problem is avoided. However, blends of incompatible polymers are frequently very brittle and cannot be considered for many applications. Additives which modify the blend to give it ductility may provide a solut…
Particle-Initiated Breakdown Between Coaxial Electrodes in Compressed SF6
The influence of conducting particles on the ac breakdown of compressed SF6has been investigated for two coaxial systems having inner electrodes of diameter 75 mm and 150 mm and a 250 mm diameter outer electrode, using voltages up to 450 kV rms at pressures up to 1.8 MNm-2(18 atm.). For filamentary particles of 0.1 mm…
Light-Scattering Studies of the Soft Ferroelectric and Acoustic Modes of KD2PO4
Light-scattering spectra of the soft-optic and -acoustic modes of K${\mathrm{D}}_{2}$P${\mathrm{O}}_{4}$ have been studied in the 0-0.8-${\mathrm{cm}}^{\ensuremath{-}1}$ spectral region for temperatures from 0 to 10\ifmmode^\circ\else\textdegree\fi{}K above the ferroelectric phase transition. The true spectra of the s…
Chemische Diffusion in Eisen‐Chrom‐ und Eisen‐Chrom‐Kohlenstoff‐Legierungen im Bereich des Austenits
Probenherstellung, Diffusionsglühen und Analyse der Proben mit der Mikrosonde. Gemeinsamer Diffusionskoeffizient als Funktion der Kohlenstoffaktivität. Vergleich mit Selbstdiffusionsmessungen.
Conditions for Formation of ErB 6
Erbium hexaboride was synthesized; it is a high‐temperature phase, stable over a limited temperature range and unstable with respect to dissociation to ErB 4 and ErB 12 at T <1975°C, although the lower temperature limit has not been determined precisely. Relatively slow cooling through its stable temperature range…
Role of Induced Anisotropy in Magnetic Spectra of Cobalt-Substituted Nickel-Zinc Ferrites
Variation of the magnetic spectra with the amount of cobalt ions is measured for samples (35- x )NiO · 8ZnO · x CoO · 57Fe 2 O 3 ( x =0∼2.5) in the frequency range from 2.5 to 1200MHz. It is shown that the dominant mechanism of the static initial-permeability of the slowly cooled samples changes with the amount of cob…
A study on zone refining: solid-phase impurity diffusion and the influence of separating the impure end
Crystal quality during zone refining is usually poor. Owing to the great density of high-diffusivity paths, solid-state diffusion should not be neglected. Its influence on the concentration profile is described by experiment and theory. Since the concentration gradient and curvature become very large at the end of the…
Chemical Analysis of Deposits at Rodgers Shelter, Missouri
While chemical analyses of deposits from archaeological sites have often used phosphorus as an indicator of past human activity, there is little agreement on which type of phosphorus test is most useful for particular problem orientations. This paper evaluates the utility of tests for total phorphorus, available phosp…
Mathematical Model of an Electric Glass Furnace: Effects of Glass Color and Resistivity
A quantitative mathematical analysis of coupled electrical power dissipation, heat transfer, and natural convection in a hypothetical all-electric glass tank furnace was conducted using a two-dimensional computer model. The model simulated numerically the complex interactions which occur among charge, mass, energy, an…
Photochemistry of mono- and diacetylenic systems. Exploratory and mechanistic organic photochemistry. LXXVII
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemistry of mono- and diacetylenic systems. Exploratory and mechanistic organic photochemistry. LXXVIIHoward E. Zimmerman and James A. PincockCite this: J. Am. Chem. Soc. 1973, 95, 10, 3246–3250Publication Date (Print):May 1, 1973Publication History Published online1 M…
Structure Analysis of Poly(propylene-β-d oxide) by Proton Nuclear Magnetic Resonance Spectroscopy
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure Analysis of Poly(propylene-β-d oxide) by Proton Nuclear Magnetic Resonance SpectroscopyNobuki Oguni, Shoji Maeda, and Hisaya TaniCite this: Macromolecules 1973, 6, 3, 459–465Publication Date (Print):May 1, 1973Publication History Published online1 May 2002Published…
Mechanisms in phosphite ozonide decomposition to phosphate esters and singlet oxygen
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanisms in phosphite ozonide decomposition to phosphate esters and singlet oxygenL. M. Stephenson and D. E. McClureCite this: J. Am. Chem. Soc. 1973, 95, 9, 3074–3076Publication Date (Print):May 1, 1973Publication History Published online1 May 2002Published inissue 1 May…
Electron paramagnetic resonance evidence for the formation of sulfur trioxide(-) ion by the oxidation of sulfur dioxide(-) ion on magnesium oxide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron paramagnetic resonance evidence for the formation of sulfur trioxide(-) ion by the oxidation of sulfur dioxide(-) ion on magnesium oxideY. Ben Taarit and J. H. LunsfordCite this: J. Phys. Chem. 1973, 77, 11, 1365–1367Publication Date (Print):May 1, 1973Publication H…
Plastic Instability of Tantalum Single Crystals Compressed at 4.2 K
Serrations due to slip were observed on the stress-strain curves of zone-refined tantalum single crystals compressed at 4.2 K. It was found on an oscillograph that each rapid stress drop was accompanied by a rapid temperature rise of about 40 K. This suggests that a discontinuous slip is caused by the plastic instabil…
Defect densities in directional media, mainly liquid crystals
It is possible to define a local frame of reference at each point of a distorted liquid crystal, transformed from a fixed frame in the perfect crystal by a pure rotation. In the local frame the director n has constant components. A curvature tensor Kij is used to describe rotations between neighbouring frames; it obey…
The Suitability of an nth-Order Rate Form to Represent Deactivating Catalyst Pellets
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Suitability of an nth-Order Rate Form to Represent Deactivating Catalyst PelletsSoon J. Khang and Octave LevenspielCite this: Ind. Eng. Chem. Fundamen. 1973, 12, 2, 185–190Publication Date (Print):May 1, 1973Publication History Published online1 May 2002Published inissue…
Soft Modes and Superlattice Structures in NaNbO3
From the study of superlattice reflections in X-ray diffraction, phase transitions at 365°C, 480°C, 520°C, 572°C and 643°C in NaNbO 3 are definitely identified by some distinct changes of the positions and intensities. The anisotropic diffuse X-ray scatterings have been studied with a special respect to the phase tran…