Materials Literature
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Abstract Die Flächenregel der Korrosion ist zuerst im Jahr 1924 eindeutig formuliert worden und wird seitdem vor allem von Praktikern gern zur Abschätzung von Korrosionswirkungen benutzt. Sie hat allerdings keine Allgemeingültigkeit, sondern gilt unter ganz bestimmten Voraussetzungen. Diese Voraussetzungen lassen sich…
Th e t h er mal decomposit ion of polytetrafluoroeth ylene in t he presence o f gases or vapors h as bee n exp lored in t he range 450 0 to 500 0 C. Gases th a t have been used ca n be di vid ed into t hree groups, d ep ending on whether t hey inhibit, catalyze, or e xert no effect on the t herma l-deco mpos it ion pr…
Abstract Equilibrium isotherms are presented for the cation exchange of copper and sodium on Dowex‐50 resin in solutions from 0.01 to 4 N in chloride content, and the equilibrium data are correlated on the basis of the Donnan equilibrium. Data are also given on the water content of the resin and the diffusible ions pr…
The topography of unmoditied cotton fibers has been examined microscopically by means of surface replica techniques. The outstanding characteristic of the surface is a system of roughly parallel ridges and grooves spiraling around the fiber at an acute angle (usually 20 30 ) to its axis. The pattern of the surface is…
The magnetic susceptibilities of various Fe-Ni alloys have been measured through their melting points up to 1600°C. The susceptibilities of the alloys with less than 60 % Ni increase discontinuously on melting, while those of the alloys with more than 60 % Ni decrease. The temperature variation of the susceptibilities…
The factors which influence the properties of dielectric films formed by thermal evaporation are discussed. Detailed results are given for several materials which are of practical importance. The results obtained for the refractive index of transparent films (a) by the Brewster angle method and (b) by the measurement…
Abstract The temperature‐dependence of specific volume, rigidity modulus, and mechanical losses of plasticized and unplasticized cellulose acetates in the temperature range −100 to +200°C. has been studied. Two cellulose acetates, a triacetate and a cellulose (2.2) acetate were used, these being plasticized with varyi…
Abstract Für ausgewählte, möglichst symmetrische Moleküle mit einer Carbonyl‐bzw. Thiocarbonylgruppe im Fünfring werden die Eigenschwingungen zugeordnet. Es wird weiterhin der Einfluß von Nachbaratomen und, durch Vergleich mit offenkettigen Verbindungen, die Wirkung der Ringspannung auf die CO‐bzw. CS‐Valenzschwingu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh Temperature Heat Contents of Calcium OrthosilicateJ. P. Coughlin and C. J. O'BrienCite this: J. Phys. Chem. 1957, 61, 6, 767–769Publication Date (Print):June 1, 1957Publication History Published online1 May 2002Published inissue 1 June 1957https://pubs.acs.org/doi/10.10…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPraseodymium Oxides. IV. A Study of the Region PrO1.83-PrO2.001C. L. Sieglaff and L. EyringCite this: J. Am. Chem. Soc. 1957, 79, 12, 3024–3026Publication Date (Print):June 1, 1957Publication History Published online1 May 2002Published inissue 1 June 1957https://pubs.acs.org…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCopper (II) and Nickel (II) N-(n-alkyl)salicylaldimine ChelatesROBERT G. CHARLESCite this: J. Org. Chem. 1957, 22, 6, 677–679Publication Date (Print):June 1, 1957Publication History Published online1 May 2002Published inissue 1 June 1957https://pubs.acs.org/doi/10.1021/jo013…
Examination of the thermal conductivity of fabrics in terms of the fiber conductance and fabric density shows that fabric insulation is determined by fiber arrangement as well as by fabric thicknes. Fiber arrangement is interpreted in terms of fibers lying parallel and perpendicular to the fabric surface, and it is sh…
Equations are given for the reflectances, transmittances, and phase changes by reflection and transmission of very thin absorbing films, i.e., films with a thickness d very small compared with the wavelength λ of the incident radiation. The similarities and differences between very thin homogeneous and inhomogeneous f…
The spontaneous saturation magnetostriction and the forced magnetostriction were measured on slowly cooled single crystals of the ferromagnetic aluminum-iron alloys in the composition range from 6 to 30 atomic percent aluminum. The value of the first constant of spontaneous saturation magnetostriction at 6 atomic perc…
The wave functions of the ground state and several lower excited states of O 2 and O 2 + are calculated non-empirically at R =2.3 a.u. by LCAO MO method, where all sixteen electrons are taken into consideration and Slater type 1 s , 2 s , and 2 p atomic orbitals are used. For the ground state of O 2 , various approxim…
It is shown that the value of the magnetic moment of manganese ferrite measured recently by Hastings and Corliss can be explained on the basis of their observations of cation distribution if the Mn in $A$ and $B$ sites is assumed to be ${\mathrm{Mn}}^{2+}$ and ${\mathrm{Mn}}^{3+}$, respectively. This possibility is di…
Fairly complete Raman spectra have been obtained of polyethylenes of different crystallinities (Marlex 50, hydrogenated Marlex 50, Marlex 20, and DYNH), Venezuela wax, n-C28H58, n-C36H74, and stearic acid. The infrared spectrum of Marlex 50 has been investigated with a Perkin-Elmer Model 112 spectrometer equipped with…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Mechanisms of Permanganate Oxidation. IV. Hydroxylation of Olefins and Related ReactionsKenneth B. Wiberg and Klaus A. SaegebarthCite this: J. Am. Chem. Soc. 1957, 79, 11, 2822–2824Publication Date (Print):June 1, 1957Publication History Published online1 May 2002Publish…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA CRYSTALLIZABLE ORGANOMETALLIC COMPLEX CONTAINING TITANIUM AND ALUMINUMGiulio Natta, Piero Pino, Giorgio Mazzanti, and Umberto GianniniCite this: J. Am. Chem. Soc. 1957, 79, 11, 2975–2976Publication Date (Print):June 1, 1957Publication History Published online1 May 2002Publ…
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