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A constant stress testing machine of small inertia and with continuous strain recording has been built. The loading was by air contained in metallic bellows whose wall stiffness was compensated by a `negative spring'. The initial strain rate was standardized at 1% per second. Polycrystalline copper and aluminium have…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-temperature Heat Contents of Tantalum and Niobium OxidesRaymond L. OrrCite this: J. Am. Chem. Soc. 1953, 75, 12, 2808–2809Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1 June 1953https://pubs.acs.org/doi/10.1021/ja0…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeats of Formation of Hafnium Oxide and Hafnium NitrideG. L. HumphreyCite this: J. Am. Chem. Soc. 1953, 75, 12, 2806–2807Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1 June 1953https://pubs.acs.org/doi/10.1021/ja01108a0…
The techniques of structure analysis using single-crystal electron-diffraction patterns have been applied to the study of very small boric acid crystals in which there is almost complete disorder in the stacking of the two-dimensional layers of atoms.The structure of the layers and the nature of the order present are…
Abstract Theoretical and practical evidence is put forward to show that copolymers can be treated like solutions of small molecules in the interpretation of packing phenomena, and that ideal volume-additivity of the repeating units in copolymers is frequently realized. On this basis equations are derived for predictin…
The flexural vibrations of the walls of thin cylinders are considered. In this type of vibration many forms of nodal pattern may exist owing to the combination of circumferential and axial nodes. Theoretical expressions are developed for the natural frequencies of cylinders with freely-supported and fixed ends and a c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Adsorption of Flexible MacromoleculesRobert Simha, H. L. Frisch, and F. R. EirichCite this: J. Phys. Chem. 1953, 57, 6, 584–589Publication Date (Print):June 1, 1953Publication History Published online1 May 2002Published inissue 1 June 1953https://pubs.acs.org/doi/10.1021…
The field dependence of mobility has been determined for electrons and holes in both germanium and silicon. The observed critical field at 298\ifmmode^\circ\else\textdegree\fi{}K beyond which $\ensuremath{\mu}$ varies as ${E}^{\ensuremath{-}\frac{1}{2}}$ is 900 volts/cm for $n$-type germanium, 1400 volts/cm for $p$-ty…
Two or more dislocation lines meeting at a point constitute a node. In face-centred cubic lattices a dislocation can split into two partial dislocations. The requirements of crystal geometry impose certain limitations on the arrangement of partial dislocations at a node. The various possibilities are discussed. It is…
The geometrical properties of structures of the ReO3-type showing recurrent dislocations of atoms, analogous to those present in MosO~ 3, Mo90~ and W20Oss, are discussed. Two of the hypothetical atomic arrangements thus derived have been found to correspond to recently prepared molybdenum tungsten oxides (1V[o,W)10029…
1. Inmildlyalkaline suspension collagenis acetylated by acetic anhydride at the free amino groups. The number of N-acetyl groups introduced is equal to the total number of lysine and hydroxylysine residues found by analysis.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhenol-, Urea-, and Melamine-Formaldehyde PlasticsP. O. PowersCite this: Ind. Eng. Chem. 1953, 45, 5, 1063–1066Publication Date (Print):May 1, 1953Publication History Published online1 May 2002Published inissue 1 May 1953https://pubs.acs.org/doi/10.1021/ie50521a053https://do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymeric Plasticizers - Preparation and Characterization of a Series of Terminated PolyestersJoseph E. Koroly and Ellington M. BeaversCite this: Ind. Eng. Chem. 1953, 45, 5, 1060–1063Publication Date (Print):May 1, 1953Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface Analysis with X-Ray Photoelectron SpectrometerR. G. Steinhardt, Jr. and E. J. SerfassCite this: Anal. Chem. 1953, 25, 5, 697–700Publication Date (Print):May 1, 1953Publication History Published online1 May 2002Published inissue 1 May 1953https://pubs.acs.org/doi/10.1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNeutron Diffraction studies on Scandium Orthovanadate and Scandium OxideW. O. Milligan, L. W. Vernon, H. A. Levy, and S. W. PetersonCite this: J. Phys. Chem. 1953, 57, 5, 535–537Publication Date (Print):May 1, 1953Publication History Published online1 May 2002Published iniss…
The compounds Mg2TiO4, MgTiO3, MgTi2O5, CaTiO3, SrTiO3, and BaTiO3 were prepared in crystalline form by reactions in the solid state. The rod-shaped samples were sintered in oxygen at 1450°C and reduced in hydrogen at temperatures from 560°C to 1400°C producing n type semiconductors. Resistivity values from 10−1 to 10…
It is well known that evaporated aluminum films develop a diffuse reflecting surface as their thickness increases, but it is not generally appreciated that the limiting thickness at which light scattering appears decreases as the incidence angle of the vapor atoms arriving at the condensing surface increases. Aluminum…
The reflection method provides means of studying the 10‐micron infrared region that contains the fundamental vibration of the silica lattice. Structural changes produced by introduction of various amounts of alkali or alkaline‐earth network modifiers can be conveniently followed. A series of soda‐silica glasses was st…
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 B. A. Lippmann, "Note on the Theory of Gratings*," J. Opt. Soc. Am. 43, 408-408 (1953) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation al…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical Properties of Organosilicon Compounds. I. Hexamethylcyclotrisiloxane and OctamethylcyclotetrasiloxaneRobert C. Osthoff, W. T. Grubb, and Charles A. BurkhardCite this: J. Am. Chem. Soc. 1953, 75, 9, 2227–2229Publication Date (Print):May 1, 1953Publication History Pub…