Materials Literature
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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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
Hall effect and transverse and longitudinal magnetoresistances have been measured in polycrystals at 4.2 K and below, in the fields up to 7 T. For pure iron ($\frac{{\ensuremath{\rho}}_{300}}{{\ensuremath{\rho}}_{4.2}}=523 \mathrm{and} 1993$), extrapolation of the Hall angle ${\ensuremath{\varphi}}_{H}$ to the high-fi…
The dependence of the optical absorption of polyethylene on photon energy is analyzed and correlated with electrical conduction. The optical gap is obtained as 7.35 eV, with a band tail of about 1 eV. Electrons transport by hopping according to μ0 exp(−Eμ/kT), where μ0 = 5 cm2/V sec and Eμ = 0.24 eV at 20–80°C. Electr…
Burgers vectors of grain boundary dislocations in important coincidence boundaries are calculated from a set of general equations derived for the three principal cubic structures. The Burgers vectors in high-order coincidence systems are mostly small in magnitude, but a large vector can occur for a coincidence system…
Abstract Spectral reflectance curves of selected soil characterization samples and standard clay minerals were studied over the wavelength interval 0.5 to 2.6µm. Results reported include reflectance data from three Hagerstown profiles and the Ap horizons of a Berks, Penn, and Ellery profile. Hagerstown soils are devel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGeneral bonding model for linear and bent transition metal-nitrosyl complexesD. M. P. MingosCite this: Inorg. Chem. 1973, 12, 5, 1209–1211Publication Date (Print):May 1, 1973Publication History Published online1 May 2002Published inissue 1 May 1973https://pubs.acs.org/doi/10…
Abstract The solution polymerization of acrylamide initiated by 4,4′‐azobis‐4‐cyanovaleric acid (ACV) at high monomer concentrations in the temperature range 25–50°C has been studied. Molecular weight distributions were measured by gel permeation chromatography and by electron microscopy. Molecular weight measurements…
Three observers used 3 different calipers (the Lange and two versions of the Harpenden caliper) to measure skinfold thicknesses in 27 men and 23 women on 8 to 9 occasions over a period of about 1 month. The subjects were aged between 17 and 22 years and none was obese. Measurements were made at the biceps, triceps, su…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and far-infrared spectra of ferric octaethylporphine complexesH. Ogoshi, E. Watanbe, Z. Yoshida, J. Kincaid, and K. NakamotoCite this: J. Am. Chem. Soc. 1973, 95, 9, 2845–2849Publication Date (Print):May 1, 1973Publication History Published online1 May 2002Publishe…