Materials Literature
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El empleo de isótopos permite estudiar perfectamente el desplazamiento de los materiales a lo largo del horno. en otros aspectos referentes a la influencia de diversos factores sobre el funcionamiento del horno y sobre el proceso de cocción, se llega a la misma conclusión que mediante los métodos clásicos de investiga…
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Nuevo procedimiento ruso para la alimentación de crudos por ambos extremos del horno rotatorio.
Fundamentos y características tanto de construcción como de funcionamiento del nuevo sistema de tamizado.
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Se analizan algunos procedimientos tanto para evitar la formación de polvo en los hornos rotatorios como para recuperarlo, en el caso de haberse producido.
Este procedimiento de realizar voladuras evitan los lanzamientos de rocas, las vibraciones del suelo y la onda explosiva.
Abstract Relations between the soluble fraction and the number of effective chains between crosslinks in a three‐dimensional network undergoing a scission reaction have been derived. Three limiting cases have been considered: (a) random scission in the chains, (b) scission in the chains directed by the crosslinks, and…
Properties of electrolyte-semiconductor barriers are described, with emphasis on germanium. The use of these barriers in localizing electrolytic etching is discussed. Other localization techniques are mentioned. Electrolytes for etching germanium and silicon are given.
Abstract The absorption spectra of fifty-two natural diamonds have been measured at 80 and 290°K. Type I diamonds are shown to have two kinds of absorption centres which are not detected in type II diamonds. Differences in the infra-red absorption spectra between type IIa and type IIb diamonds are reported. The classi…
An optical absorption band at 9\ensuremath{\mu} has been correlated with the oxygen content in silicon. Pulled silicon crystals were found to contain up to ${10}^{18}$ oxygen atoms per ${\mathrm{cm}}^{3}$ which seem to originate from the quartz crucible. The oxygen concentration in silicon crystals prepared by the flo…
Abstract An account is given of the deformation and fracture characteristics of single crystals of high-purity iron of various orientations when tested in tension at temperatures from 100 to ─253°C. At temperatures down to ─124°C, the crystals were fully ductile, giving chisel-edge fractures and 100% reduction in area…
A survey of the newer flame retardants suggests a simple theory for their constitu tion. The molecule should be water-insoluble to achieve durability in laundering. A solvent-soluble organic molecule is therefore proposed. The ortho-phosphate group should be present in the molecule to dehydrate catalytically the cellu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Influence of Chemisorbed Gases on the Magnetization of Catalytically Active Nickel1Louise E. Moore and P. W. SelwoodCite this: J. Am. Chem. Soc. 1956, 78, 4, 697–701Publication Date (Print):February 1, 1956Publication History Published online1 May 2002Published inissue 1…
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 E. H. Carlson, R. D. Spence; Paramagnetic Resonance in Cu(NH3)4SO4·H2O. J. Chem. Phys. 1 February…
The thermal expansivity of a number of calcium, strontium , and barium borate glasses are reported.The ex pansivity of the calcium and strontium borates increases with increasing alkaline-earth oxide concentration.Th e expansivity of the barium borate glasses is a m inimum at about 20 mole percent of barium oxide.The…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Pure Potassium MetaniobateArnold Reisman, Frederic Holtzberg, Sol Triebwasser, and Melvin BerkenblitCite this: J. Am. Chem. Soc. 1956, 78, 4, 719–720Publication Date (Print):February 1, 1956Publication History Published online1 May 2002Published inissue 1 Febr…
Powder deposit patterns obtained by the authors on single crystals of 3% silicon iron are consistent with a description of the processes of domain phase creation in terms of nucleation at inclusions in the surfaces. Domain nucleation is discussed in relation to various magnetic properties.