Materials Literature
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A nuclear-magnetic-resonance method is explored, which effectively attenuates the dipolar interaction in solids. The experimental technique corresponds to the observation of a free-induction decay in a frame of reference rotating with the frequency of an applied rf field. When the amplitude ${H}_{1}$ of this field is…
Distribution of magnesium and strontium was determined between waters and calcites secreted by the oyster species Crassostrea virginica and C. rhizophorae in natural habitats at eight localities, from Maine to Puerto Rico. The concentration of strontium in the calcite shells increases with increasing temperature in th…
The Wagner equation for the isothermal oxidation of metals is re-established. One of the assumptions used in deriving the equation is removed.
In this study of Neoprene W, it has been possible to show that this elastomer possesses a fairly wide distribution of molecular weights and presents some degree of branching. The relationship \documentclass{article}\pagestyle{empty}\begin{document}$\left[ {\bar \eta } \right]$\end{document} = 2.90 × 10−3M has been est…
Abstract A number of N,N‐dialkylamides have been prepared, characterized and evaluated as plasticizers for poly (vinyl chloride‐vinyl acetate) copolymer. Among these are the N‐oleoyl derivatives of diisopropyl, dibutyl, diisobutyl, diamyl, dihexyl, diheptyl, dioctyl, di‐2‐ethylhexyl and didecylamines. Also included ar…
Lifetimes and relative quantum yields of phosphorescence were measured over the temperature range −10° to −196°C for solutions of palladium (II) mesoporphyrin IX, dimethyl ester, and ρ-phenylbenzophenone in methylphthalylethylglycolate. The observed variation in the rate constants for the unimolecular decay of the tri…
Donella H. Turner, E. S. Blanch, Martin Gibbs, J. F. Turner; Triosephosphate Isomerase of Pea Seeds 12, Plant Physiology, Volume 40, Issue 6, 1 November 19
In a previous paper the correlation function formula for the thermal conductivity was used to derive equations for the lowest-order contribution to the lattice thermal conductivity Kij. An explicit but formal solution of these equations is obtained here, and it is shown how this solution simplifies in the limit of inf…
Mathematical descriptions of the stress-strain-time behavior of plastic crystals are developed using a statistical approach to dislocation dynamics. First, the ``easy-glide'' portions of stress-strain curves are described in terms of glide band propagation. Then, three models of strain hardening are developed and used…
Transmittance measurements of optical materials were made at 25°C, 100°C, 200°C, 300°C, and 400°C in the 1-μ to 12-μ range with a Perkin-Elmer Model 21 spectrophotometer. A continuous proportioning temperature control system, using a modified Loyola LC-2 4KVA Power Manipulator in conjunction with a Wheelco Capacitrol,…
The breakdownof the air-formed oxide film on iron is greater upon immersion in corrosive than inhibitive solutions; it is retarded by dissolved oxygen and in some solutions marginally affected by the age, or thickness,of the film. The breakdown is not due to direct solution, as with aluminium, but to reductive dissolu…
The effect of pressure, up to 50 kbar, on the low-frequency dielectric constant $\ensuremath{\epsilon}$ of SrTi${\mathrm{O}}_{3}$ has been measured at 25\ifmmode^\circ\else\textdegree\fi{}C. $\ensuremath{\epsilon}$ decreases with increasing pressure according to the relation $\ensuremath{\epsilon}=\frac{{C}^{*}}{(p\en…
Article Die Absorption der Röntgenstrahlen im Dreistrahlfall der Interferenz was published on November 1, 1965 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 121, issue 1-6).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Preparation and Properties of Some Tetracoordinate Boron Compounds. The Pseudo-Metal Ion ConceptL. H. Toporcer, R. E. Dessy, and S. I. E. GreenCite this: Inorg. Chem. 1965, 4, 11, 1649–1655Publication Date (Print):November 1, 1965Publication History Published online1 May…
The barium ferrates comprise a series of compositions exhibiting a wide range of oxygen deficiency. Members of this series are isostructural with the high-temperature polymorph of barium titanate which is hexagonal with space group C63/mmc. Polycrystalline specimens with varying oxygen contents, i.e., Fe4+ concentrati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvent Effects on the Spin Resonance Spectra of Cobalt PhthalocyanineJacques M. AssourCite this: J. Am. Chem. Soc. 1965, 87, 21, 4701–4706Publication Date (Print):November 1, 1965Publication History Published online1 May 2002Published inissue 1 November 1965https://pubs.acs…
Detailed examination of recent strength‐grain size data for MgO, Al 2 O 3 , and BeO ceramics showed that for large grain sizes behavior was of the form of the Knudsen equation: image . For small grain sizes, behavior fitted the form of the Petch equation, image or appeared similar but with negative slope. Three charac…
In order to provide a basis for calibration of X-ray-emission analyses, existing theories and experimental measurements on the generation, absorption, and fluorescence of X-rays produced by electron bombardment of mixed targets are reviewed and compared with new measurements for a variety of targets, principally commo…
Cast amorphous one mil films of poly(ethylene terephthalate)were allowed to crystallize isothermally in silicone oil over the temperature range 25–240°C. The crystallization paths were followed by recording the percent of transmission of 4000 A. light through the films as a function of time at specific temperatures. A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIncorporation of cis- and trans-4-Fluoro-L-prolines into Proteins and Hydroxylation of the trans Isomer During Collagen Biosynthesis*A. Arthur Gottlieb, Yoshimasa Fujita, Sidney Udenfriend, and Bernhard WitkopCite this: Biochemistry 1965, 4, 11, 2507–2513Publication Date (Pr…