Materials Literature
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Summary From molecular distillation data, and information obtained by hydrogenation in dilute solution, extents of reaction have been calculated for the polymerization of linseed, safflower, tung, and oiticica oils. The hydrogenation data indicate that more than one double bond per molecule can be consumed during poly…
Abstract The losses of bacteriostats from rubber-closed multidose containers of injections are confirmed, and the mechanism of these losses by absorption, diffusion and volatilisation is discussed. The present B.P. methods of pretreating rubber closures are inadequate, and methods for their more satisfactory equilibra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Gas Phase Constitution of Boric OxideMilton D. ScheerCite this: J. Phys. Chem. 1957, 61, 9, 1184–1188Publication Date (Print):September 1, 1957Publication History Published online1 May 2002Published inissue 1 September 1957https://pubs.acs.org/doi/10.1021/j150555a013http…
Summary A nephelinite from the extinct volcano Mt. Shaberu, North Kivu, Belgian Congo, contains two new minerals: Götzenite is triclinic with a 10·93, b 7·32, c 5·74 Å, α 90°, β 100°, γ 120°; the unit-cell contents approximate to (Ca,Na,Al) 7 (Si,Ti) 5 O 15 F 3·5 , and the optical constants are α 1·660, β 1·662, γ 1·6…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Equilibrium Constants and Oxidation-Reduction Potentials of Some Thiol-Disulfide Systems1Lorentz Eldjarn and Alexander PihlCite this: J. Am. Chem. Soc. 1957, 79, 17, 4589–4593Publication Date (Print):September 1, 1957Publication History Published online1 May 2002Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of Solutions. I1Terrell L. HillCite this: J. Am. Chem. Soc. 1957, 79, 18, 4885–4890Publication Date (Print):September 1, 1957Publication History Published online1 May 2002Published inissue 1 September 1957https://pubs.acs.org/doi/10.1021/ja01575a016https://doi.org/10.…
High frictional temperatures during the dry or imperfectly lubricated rubbing of steel produce gross structural changes and intense hardening of the surface layers. In consequence of these changes the wear time curve shows a marked inflexion, the wear rate of soft steel on soft steel diminishing by more than an order…
The thermal expansion of alkali halides has been investigated at very low temperatures and at high temperatures. Attention has been concentrated on the isotropic cases, for which a formal expression for the Gruneisen constant has been obtained. It is shown that the Gruneisen constant is expected to increase somewhat a…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text , "Journal of Ultrastructure Research," J. Opt. Soc. Am. 47, 866-866 (1957) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save ar…
Abstract Es wird an mehreren Hydroxy‐ und Amino‐phenoxazonen und ihren Acetaten gezeigt, daß Phenoxazone im IR‐Spektrum zwischen 6.0 und 6.5 μ drei charak‐teristische Schlüsselfrequenzen besitzen. Die Verschiebung der längstwelligen Bande im sichtbaren Spektrum dieser Verbindungen mit Säure und Alkali hängt von der St…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSTEROIDAL LACTONESJ. A. Cella and C. M. KagawaCite this: J. Am. Chem. Soc. 1957, 79, 17, 4808–4809Publication Date (Print):September 1, 1957Publication History Published online1 May 2002Published inissue 1 September 1957https://pubs.acs.org/doi/10.1021/ja01574a058https://doi…
A previously published phenomenological theory of the statistics and time dependence of the creep failure of oriented polymeric filaments is here applied to bundles of filaments. The mathematical apparatus of the theory of stochastic processes is used to calculate relationships between the strength of filament bundles…
Abstract A montmorillonite suspension was placed in a miniature compression chamber bounded on one side by a cellulose membrane supported by a water saturated porous Alundum disk, and on the other by a rubber film. Changing the ambient pressure on the film caused water to move across the membrane until the swelling pr…
The dielectric constants ${\ensuremath{\epsilon}}_{b}$ of tri-glycine sulfate and tri-glycine fluoberyllate show a pronounced anomaly at the Curie temperature of 48\ifmmode^\circ\else\textdegree\fi{}C and 70\ifmmode^\circ\else\textdegree\fi{}C, respectively. The dielectric constants ${\ensuremath{\epsilon}}_{a}$ and $…
The reactions which take place in the system MgO-MgSO4-H2O at concentrations of MgSO4 solutions up to saturation and temperatures from 30 to 120 °C have been studied in detail. Four oxysulphates have been found, namely, 5Mg(OH)2.MgSO4. 3 or 2H2O, 3Mg(OH)2.MgSO4.8H2O, Mg(OH)2. MgSO4.5H2O, and Mg(OH)2.2MgSO4.3H2O, and a…
The thermal conductivity of Al 2 O 3 , MgO, TiO 2 , and CaF 2 single crystals and single‐phase poly‐crystalline aggregates of controlled microstructure was measured between 0° and 1000°C. The conductivity of pure single‐phase dense polycrystalline aggregates agrees with that of the corresponding single crystals at tem…
A method of measuring the first magnetic anisotropy constant, ${K}_{1}$, of cubic crystals having a large anisotropy was developed which utilized measurements of the torque for directions of the applied field near the direction of easy magnetization. By this method ${K}_{1}$ of a cobalt ferrite crystal was found to be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of the Charge Density of Silica SolsG. H. BoltCite this: J. Phys. Chem. 1957, 61, 9, 1166–1169Publication Date (Print):September 1, 1957Publication History Published online1 May 2002Published inissue 1 September 1957https://pubs.acs.org/doi/10.1021/j150555a007h…
The morphology and orientation of a number of polymers as crystallized from solution was studied with the electron microscope combined with selected area electron diffraction. In the course of this work single crystals could be prepared which were most striking in the case of straight chain polyethylenes. There is evi…
1. Properties of X-rays. 2. Geometry of Crystals. 3. Diffraction I: Directions of Diffracted Beams. 4. Diffraction II: Intensities of Diffracted Beams. 5. Diffraction III: Non-Ideal Samples. 6. Laure Photographs. 7. Powder Photographs. 8. Diffractometer and Spectrometer. 9. Orientation and Quality of Single Crystals.…