Relation between Catalytic Activity and Size of Particle
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Über Zweistoffsysteme mit Germanium. I. Germanium/Aluminium, Germanium/Zinn und Germanium/Silicium
Abstract 1. Es wird gezeigt, daß die Untersuchung von Systemen, die Halbmetalle enthalten, f¨︁r die Aufklärung feinerer Affinitätswirkungen von Bedeutung ist.
The Interaction of Maleic Anhydride with Rubber
Abstract (1) Maleic anhydride is known to react ( a ) with conjugated compounds, e.g. , butadiene, usually producing simple cyclic systems, and ( b ) with unsaturated olefinic substances like styrene and vinyl acetate, producing long-chain heteropolymers. It is now demonstrated that maleic anhydride, under the influen…
The Crystal Structure of Neodymium Bromate Enneahydrate, Nd(BrO3)3·9H2O
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Crystal Structure of Neodymium Bromate Enneahydrate, Nd(BrO3)3·9H2OLindsay. HelmholzCite this: J. Am. Chem. Soc. 1939, 61, 6, 1544–1550Publication Date (Print):June 1, 1939Publication History Published online1 May 2002Published inissue 1 June 1939https://doi.org/10.1021/…
Warder's method for the titration of carbonates
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWarder's method for the titration of carbonatesA. A. Benedetti-Pichler and Michael CefolaCite this: Ind. Eng. Chem. Anal. Ed. 1939, 11, 6, 327–332Publication Date (Print):June 1, 1939Publication History Published online1 May 2002Published inissue 1 June 1939https://pubs.acs.…
Edge correction in the determination of dielectric constant
An edge correction is often required in determining the dielectric constant of an insulating material by the capacitance method. Theoretical formulas by which the edge correction may be computed have been considered for a number of electrode arrangements. Some of these apply to circular electrodes and some to rectangu…
Dumas method for organic nitrogen
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDumas method for organic nitrogenFred Shea and C. E. WattsCite this: Ind. Eng. Chem. Anal. Ed. 1939, 11, 6, 333–334Publication Date (Print):June 1, 1939Publication History Published online1 May 2002Published inissue 1 June 1939https://pubs.acs.org/doi/10.1021/ac50134a013http…
Diffusion in absorbing media
Abstract The problem to be discussed, which arose in connexion with the uptake of moisture by cotton bales, is that of diffusion of one substance through another in the pores of a solid body which may absorb and immobilize some of the diffusing substance. Heat will be evolved by the absorption process, and this will i…
On Radiative Corrections for Electron Scattering
A relativistic treatment of the radiative correction of order $\frac{{e}^{2}}{\ensuremath{\hbar}c}$ to the elastic scattering cross section leads to the following results: (a) For the scattering in an electrostatic field of a particle described by the Pauli-Weisskopf theory, the correction is finite and is given by (3…
Die Gitterkonstanten der C‐Formen der Oxyde der seltenen Erdmetalle
Abstract Die Gitterkonstanten der C‐Formen der Sesquioxyde von Neodym, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Erbium, Thulium, Ytterbium und Cassiopeium wurden neu bestimmt. Die Gitterkonstanten der Oxyde von Gadolinium bis Cassiopeium bilden eine stetige Kurve, die der Oxyde von Neodym bis Gadolinium ei…
Beiträge Zur Kenntnis der Alkalimetallchalkogenide
Abstract 1. Es wird die Darstellung der Monosulfide, Selenide und Telluride vou Natrium, Kalium, Rubidium und Cäsium beschrieben.
Density of Single Crystals of Cupric Acetate Monohydrate
Densities of single crystals of cupric acetate monohydrate have been determined by the pycnometer method for temperatures 21.0°C, 23.5°C and 25.0°C, and are 1.907±0.001, 1.891±0.004 and 1.880±0.003 g cm-3, respectively. The first one compares favorably with the value (1.906 g cm-3) calculated at about 21.0°C from accu…
The Inner, Initial, Magnetic Permeability of Iron and Nickel at Ultra-High Radiofrequencies
A new method for the measurement of the ultra-high frequency, initial, inner permeability of ferromagnetic materials has been developed which gives much greater accuracy and is much faster than the older methods. The probable error is under one percent at a frequency of 197 megacycles per second, as contrasted with pr…
The diffraction of electrons by anthracene
The diffraction of electrons by anthracene crystals gives results which are in agreement with the structure as previously determined with x rays. In addition to the normal type of multispot pattern characteristic of electron diffraction by thin single crystals, however, there appears superimposed another pattern consi…
THE ISOLATION OF VITAMINS K1 AND K2
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE ISOLATION OF VITAMINS K1 AND K2R. W. McKee, S. B. Binkley, D. W. MacCorquodale, S. A. Thayer, and E. A. DoisyCite this: J. Am. Chem. Soc. 1939, 61, 5, 1295Publication Date (Print):May 1, 1939Publication History Published online1 May 2002Published inissue 1 May 1939https:…
Further measurements of the thermal and electrical conductivity of iron at high temperatures
The author's previously published results for the thermal conductivity of Armco iron up to a temperature of 800° c. have been confirmed by two independent methods. The first was a comparative method involving longitudinal heat-flow, and the second an absolute method in which the heat flowed radially from the centre to…
The Crystal Structure of Glycine
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Crystal Structure of GlycineGustav. Albrecht and Robert B. CoreyCite this: J. Am. Chem. Soc. 1939, 61, 5, 1087–1103Publication Date (Print):May 1, 1939Publication History Published online1 May 2002Published inissue 1 May 1939https://pubs.acs.org/doi/10.1021/ja01874a028ht…
Resistance, Emissivities and Melting Point of Tantalum
The relation between true and brightness temperatures of tantalum was determined by means of pyrometric observations on the inside and outside of a long thin-walled tube heated electrically. The brightness temperature as a function of heating current was determined by sighting on an electrically heated wire of known d…
Technical Evaluation of Textile Finishing Treatments
This is the first of a series of research progress reports by Prof. E. R. Schwarz on the "Technical Evaluation of Textile Finishing Treatments" that is being sponsored jointly through a co-operative research agree— ment between Massachusetts Institute of Technology and the American Association of Textile Chemists and…
THE CONSTRUCTION OF A MAGNETIC ELECTRON MICROSCOPE OF HIGH RESOLVING POWER
A brief historical review of the development of the electron supermicroscope is given. This is followed by a theoretical discussion of the resolving power attainable with the instrument and a summary of the important results which have been obtained by other workers. A description is given of the supermicroscope which…