Materials Literature
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ALTHOUGH heating is one of the chief limitations in the rating of induction machines, present methods of predicting heating leave much to be desired. Articles have been written on the subject of heating of very large motors and generators,1,2but relatively little appears to have been done toward developing accurate an…
AKNOWLEDGE of the voltage gradient which exists at the surface of a transmission-line conductor is necessary in many instances. This knowledge is especially important in studies regarding corona losses and radio interference.
Rates of dehydration under full vacuum, and also as the pressure of water vapor due to the dehydration process was allowed to increase, have been determined for a number of hydrated salts. The dehydration of manganous sulphate tetrahydrate, zinc sulphate heptahydrate, nickel sulphate hexahydrate, and magnesium sulphat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Synthesis of 6-ThioguanineGertrude B. Elion and George H. HitchingsCite this: J. Am. Chem. Soc. 1955, 77, 6, 1676Publication Date (Print):March 1, 1955Publication History Published online1 May 2002Published inissue 1 March 1955https://pubs.acs.org/doi/10.1021/ja01611a082…
Studies of the effect of dehydration at temperatures greater than 150° on sorption by montmorillonites have shown that small interlayer cations such as lithium and magnesium promote an irreversible decrease in the amount of interlamellar sorption and a consequent marked fall in the cation exchange capacity as measured…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh Temperature Heat Contents of Aluminates of Calcium and MagnesiumK. R. BonnicksonCite this: J. Phys. Chem. 1955, 59, 3, 220–221Publication Date (Print):March 1, 1955Publication History Published online1 May 2002Published inissue 1 March 1955https://pubs.acs.org/doi/10.10…
The minimum amounts of lanthana and neodymia required to stabilize zirconia into a cubic form are 30 and 20 mole %, respectively, at 980°C. X‐ray diffraction studies have established the upper limit of the two cubic solid solution regions as approximately 40 mole %. This stabilized region of the phase diagrams broaden…
Joyce C. Lewin; Silicon Metabolism in Diatoms. II. Sources of Silicon for Growth of Navicula Pelliculosa. 123, Plant Physiology, Volume 30, Issue 2, 1 March 195
A study is made of the various factors governing the flow of air through plugs of textile fibres. The magnitude of the porosity effect differs from that predicted by various hydrodynamical theories. The nature of the fibre surface is also found to affect the flow. An empirical relation between flow and the various plu…
There are two extreme types of activated carbon and carbon black although structures intermediate between these two extremes are more usual. This work has established that in one extreme, the oxidized form (" H " carbon), the carbon has a pronounced quinonoid structure which creates a number of fixed olefinic bonds. I…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the Polymerization of a Cyclic Dimethylsiloxane1W. T. Grubb and Robert C. OsthoffCite this: J. Am. Chem. Soc. 1955, 77, 6, 1405–1411Publication Date (Print):March 1, 1955Publication History Published online1 May 2002Published inissue 1 March 1955https://pubs.acs.…
Commonwealth Scientific and Industrial Research Organization, Australia1 1 The work described in this paper was carried out as part of the research program of the Division of Soils, of this Organization, at the Plant and Soils Laboratory, George Street, Brisbane, Queensland. Acknowledgment is made to C. S. Piper, chem…
The relation between self-diffusion coefficient and viscosity is examined in terms of the early hydrodynamic theory and Eyring's kinetic theory. They differ by a factor of about 6. A detailed consideration of the kinetic theory shows that this factor should have been included in Eyring's derivation of viscosity if a p…
During normal spontaneous inspiration pulmonary blood flow increases in spite of an increase in resistance to flow in the pulmonary bed. The enhancement of pulmonary flow is caused by an augmentation of venous return due to thoracic aspiration. The right heart acts as a moderator for the pulmonary flow by temporarily…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntroduction to Nuclear Engineering.W. R. KanneCite this: J. Am. Chem. Soc. 1955, 77, 5, 1394Publication Date (Print):March 1, 1955Publication History Published online1 May 2002Published inissue 1 March 1955https://pubs.acs.org/doi/10.1021/ja01610a108https://doi.org/10.1021/…
The system BaO‐TiO 2 was investigated using quenching, strip‐furnace, and thermal techniques. Five compounds were found to exist in the system: Ba 2 TiO 4 , BaTiO 3 , BaTi 2 O 5 , BaTi 3 O 7 , and BaTi 4 O 9 . Of these, only barium metatitanate (BaTiO 3 ) melts congruently (at 1618°C.). The dititanate melts incongruen…
Los autores presntan los resultados do sus estudios sobro las dimensiones apropiadas que se han de dar a los hornos rotatorios, en relación al transporte del material y a las condiciones de transmisión del calor; dichos resultados prueban la existencia de una regularidad perfecta. Estudian, especielmente, la influenci…
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El propósito fundamental de asta investigación ha sido el determinar cómo influyen sobre el color de los productos cocidos los constituyentes de la arcilla, y, si es posible, determinar la naturaleza de loa compuestos y soluciones sólidas que dan lugar a las diversas coloraciones. También se realizaron ensayos con el…
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