Materials Literature
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A Hall effect measurement technique is described which overcomes some of the difficulties presented by materials combining a small Hall angle with a large temperature coefficient of conductivity. The major problem of `offset' voltage suppression is dealt with by using a direct primary current in conjunction with an al…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProof of structure of the colored photoproducts of chromenes and spiropyransJaroslav Kolc and Ralph Sherman BeckerCite this: J. Phys. Chem. 1967, 71, 12, 4045–4048Publication Date (Print):November 1, 1967Publication History Published online1 May 2002Published inissue 1 Novem…
Single crystals of R2S3, R = Dy, Gd, Nd, and Y, have been grown by flame fusion in an argon plasma torch and by the Bridgman technique. The purification of R2O3 starting materials, synthesis and analysis of compound powders R2S3, crystal growth, analysis to determine if single crystals are produced, and measurement of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of crystallization temperature and molecular weight on the melting temperature of linear polyethyleneM. R. Gopalan and Leo MandelkernCite this: J. Phys. Chem. 1967, 71, 12, 3833–3841Publication Date (Print):November 1, 1967Publication History Published online1 May 200…
The magnetic relaxation times T1 for 14N and 2D in liquid CD3CN have been measured as functions of temperature and concentration of added ionic salts. With no model assumed for the reorientation process, the molecular rotation is demonstrated to be anisotropic. The further assumption of a rotational diffusion equation…
Article Untersuchungen zur Kristallstruktur und magnetischen Struktur des Ferberits FeWO4 was published on November 1, 1967 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 124, issue 1-6).
Nonaxial paramagnetic resonance spectra in Ce-doped CaWO4, with and without sodium compensation, have been observed and the g parameters measured. It is suggested that the compensation-site g ellipsoids can be largely explained as a perturbation of the axial-site g ellipsoid caused by the odd fields of the compensatin…
Solubilization and reconstitution is one of the key steps in the purification of fibrous proteins and in the clarification of certain of their physical properties. Since the description of amyloid as a
Room temperature measurements of the Seebeck coefficient (α), electrical conductivity (σ), thermal conductivity (κ), and thermoelectric figure of merit (Z) were made on samples of n-type Bi 2 Te 3 –Bi 2 Se 3 pseudobinary alloys over the whole composition range. To obtain maximum Z, doping was carried out at each compo…
Using a thermobalance, the oxygen content of urania containing small amounts of yttria or lanthana was determined as a function of the oxygen partial pressure at 1100° to 1400°C. Values for the partial free enthalpy, the partial enthalpy, and partial entropy of oxygen were calculated. Equilibrium oxygen pressures over…
A theoretical analysis of the load-elongation behavior of idealized plain-weave fabrics subjected to biaxial stresses is presented. Fabric strains resulting from both crimp interchange and yarn extension are considered. The analytical expressions de rived have been solved with the aid of a digital computer for both li…
Abstract Data on wettability of elastomers should be considered basic to the understanding of all phases of elastomer adhesion. However, no such data in the form of critical surface tensions were available for elastomers other than polydimethylsiloxane. For this study, 18 elastomers were selected to determine the effe…
Abstract Under some conditions, continuous crystallization exhibits cyclic changes of the particle size even with constant input conditions. A linearized stability analysis has been performed to determine under what conditions this behavior can be expected. Numerical solutions of the actual nonlinear system equations…
This paper compares the syntheses and the thermal stabilities of twelve related conjugated, pseudoconjugated, and nonconjugated Schiff base polymers of the general formula in which Z represents The polymers were prepared (a) by the condensation of Z(NH2)2 and p-C6 H4(CHO)2 in (1) solution and (2) as melts, and (b) by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin equilibrium in tris(2-aminomethylpyridine)iron (II) halidesGordon A. Renovitch and Willie Arthur. BakerCite this: J. Am. Chem. Soc. 1967, 89, 24, 6377–6378Publication Date (Print):November 1, 1967Publication History Published online1 May 2002Published inissue 1 November…
The effect of dispersions of either cobalt or silica upon the dislocation distributions in deformed copper crystals has been investigated. The crystals were deformed in tension, and three-stage stress-strain curves, similar to those of single-phase copper, were obtained. However, the precipitates caused an increase in…
Abstract Effects of filler on mechanical properties of composites result from stress concentrations developed in the matrix and filler particles. Stress concentrations in filler particles relieve stress in the matrix which, under a given load, deforms less than it would in absence of filler. This accounts for high mod…
Changes are reported in total cellular organic carbon, nucleic acids, proteins, carbohydrates, lipids and chlorophylls during the course of silicon-starvation synchrony of Navicula pelliculosa. All constituents increased at the same rate, relative to cell number, for 30 hours of exponential growth during which silicon…
The distribution of cations in different coordinations in the spinel structure as a function of equilibrium temperature was quantitatively determined for several phases. The spinels were synthesized and/or reacted at various temperatures and pressures. The relative X‐ray intensities of various reflections of the quenc…
Glutaraldehyde was quantitated by chemical titration, osmometry and ultraviolet spectrophotometry. Pure glutaraldehyde exhibited an absorption maximum at 280 mµ and absorbance at this wavelength conformed to Beer's law. A second maximum at 235 mµ indicated the presence of "impurities" (probably of polymeric origin), a…