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En el presente trabajo se trata de establecer experimentalmente las diferencias entre los comentos aluminosos y los portland en cuanto a su comportamiento frente a una nueva técnica que ya fue descrita (1) (2), para determinar el tiempo de fraguado (principio, fin e intervalo), basada en las variaciones de resistencia…
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An article by Birkhoff, MacDougall, Pugh, and Taylor (see reference 1) presented hydrodynamic theories of jet formation and target penetration by explosives with lined conical cavities. However, it was unable to explain satisfactorily why the jets produced are several times as long and, therefore, several times as eff…
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Abstract The Abbe theory of image formation for a plane object is extended to apply to the case of a three-dimensional object. The diffraction of light by such an object is treated by the standard methods applied to the diffraction of X-rays by crystals. The formation of an image of a three-dimensional periodic object…
Interstitial atoms and vacancies play an important role in the theory of solids and of radiation damage. It is difficult to separate and measure unambiguously these lattice disturbances in metals. It is suggested that measurements of changes in elastic constants may be appropriate in such investigations.An approximate…
Phase transitions in solid solutions (Pb---Ba)Zr${\mathrm{O}}_{3}$ and (Pb---Sr)Zr${\mathrm{O}}_{3}$ have been studied by dielectric, dilatometric, and calorimetric measurements. It is shown that when the Ba concentration in (Pb---Ba)Zr${\mathrm{O}}_{3}$ compositions exceeds a threshold value of about 5 percent, a fer…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCracking of Rubber and GR-S in OzoneG. R. Cuthbertson and D. D. DunnomCite this: Ind. Eng. Chem. 1952, 44, 4, 834–837Publication Date (Print):April 1, 1952Publication History Published online1 May 2002Published inissue 1 April 1952https://pubs.acs.org/doi/10.1021/ie50508a039…
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 H. A. Gebbie and C. G. Cannon, "Properties of Amorphous Selenium and Its Use as an Optical Material," J. Opt. Soc. Am. 42, 277-277 (1952) Export Citati…
A general theory of phase transformation by means of static pulsating-flux transformers is presented, i.e. m to n phases on a k-limbed transformer, m, n, and k being integers greater than unity. This is derived from the requirements of e.m.f. and m.m.f. balance. Except in the so-called 2-phase case, freedom of choice…
Abstract ( 1 ) Sebacamide and N , N ′‐diacetylhexamethylenediamine interchange to produce acetamide and polyhexamethylene sebacamide. ( 2 ) The rate is proportional to the concentrations of the two reacting species and to the square root of carboxyl group concentration. ( 3 ) The rate increases with increasing concent…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of Acrolein and Related Compounds. VI. Condensations with AminesH. Finch, E. A. Peterson, and S. A. BallardCite this: J. Am. Chem. Soc. 1952, 74, 8, 2016–2018Publication Date (Print):April 1, 1952Publication History Published online1 May 2002Published inissue 1 Apr…
Differential thermal analyses of samples of Kamec (N. C.) kaolin, Tako (Ala.) kaolin, an English kaolin, dickite (Ouray, Colo.), halloysite (Eureka, Utah), and diaspore (Chester, Mass.) were run under dynamic conditions in atmospheres containing water vapor of known partial pressures ranging from 5.0 to 760 mm. The di…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies on the Alkaline Earth Diuranates1Henry R. Hoekstra and Joseph J. KatzCite this: J. Am. Chem. Soc. 1952, 74, 7, 1683–1690Publication Date (Print):April 1, 1952Publication History Published online1 May 2002Published inissue 1 April 1952https://pubs.acs.org/doi/10.1021/…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Arthur H. Mones, Benjamin Post; X‐Ray Diffraction Study of Crystalline Neopentane (Tetramethyl Me…
The possibility has been investigated that helium atoms escape from the crystal structures of minerals only as these structures become damaged by intense alpha‐particle ionization. The escape of helium from zircon and sphene has been found to be almost zero for cases of low alpha bombardment, and increases progressive…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Contribution to the Knowledge of Some Physico-chemical Properties of PolystyreneNils Graln and Gsta LagermalmCite this: J. Phys. Chem. 1952, 56, 4, 514–523Publication Date (Print):April 1, 1952Publication History Published online1 May 2002Published inissue 1 April 1952http…
(1952). Electron-Microscopy of Degraded Cellulose Fibres. Journal of the Textile Institute Transactions: Vol. 43, No. 4, pp. T196-T201.