The production, properties and uses of calcium sulppate plasters
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Mathematical theory of stationary dislocations
(1952). Mathematical theory of stationary dislocations. Advances in Physics: Vol. 1, No. 3, pp. 269-394.
EMERGENCY MEASURES AND PRECAUTIONS IN RADIUM ACCIDENTS
The escape of radium salts from sealed containers has, in several instances, resulted in expenditure of from $50,000 to $100,000 by the institutions where such accidents occurred. These figures may seem exceedingly high. They include, however, the costs of decontamination, medical care, legal advice, lost production t…
Sorption and surface diffusion in porous glass
Abstract Sorption, gas-phase diffusion in the region of molecular streaming, and surface diffusion in very dilute adsorbed films have been studied quantitatively for a number of gases in membranes of porous glass. The sorption of oxygen, nitrogen, argon, sulphur dioxide and ammonia near their liquefying temperatures r…
The thermionic constants of metals and semi-conductors I. Graphite
Abstract The thermionic constants of graphite are determined by finding by Knudsen’s effusion method the saturation vapour pressure of the electron gas in a graphite chamber, at different known temperatures, and applying the well-known Clapeyron-Clausius thermodynamic relation. The work function Φ of graphite determin…
Spectrophotometric Determination of Titanium with Ascorbic Acid
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectrophotometric Determination of Titanium with Ascorbic AcidEdward Hines and D. F. BoltzCite this: Anal. Chem. 1952, 24, 6, 947–948Publication Date (Print):June 19, 1952Publication History Published online1 May 2002Published inissue 19 June 1952https://pubs.acs.org/doi/10…
The flow of polycrystalline metals under simple shear
Abstract The creep of three polycrystalline metals—commercial lead, pure lead and cadmium — has been investigated under conditions of simple shear, by a method in which a constant couple is applied to an annulus cut in a thicker disk of the metal. For comparison, normal tensile tests have been carried out on wires of…
Der Magnesiumwasserstoff MgH2
Abstract Der Magnesiumwasserstoff MgH 2 läßt sich durch thermische Zersetzung von Magnesium‐diäthyl bei 200° im Hochvakuum rein darstellen: Mg(C 2 H 2 → MgH 2 +2C 2 H 4 . Bei der Pyrolyse von Magnesium‐dibutyl wird ein durch Magnesium verunreinigter Magnesiumwasserstoffgebildet, da sich hier bereits eine Nebenreaktion…
Investigations of the Reversion of Vulcanized Rubber under Heat
Abstract (1) During reversion of a vulcanizate, the breakdown of cross-linkages, including those of polysulfides, predominates over any simultaneous reformation of cross-linkages. (2) The reverting modulus falls exponentially with time. (3) The calculated molar free energy of activation is 33.3 ± 1.7 kcal., irrespecti…
Nucleation in Sucrose Solutions
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNucleation in Sucrose SolutionsAndrew VanHook and Floro FrullaCite this: Ind. Eng. Chem. 1952, 44, 6, 1305–1308Publication Date (Print):June 1, 1952Publication History Published online1 May 2002Published inissue 1 June 1952https://doi.org/10.1021/ie50510a035RIGHTS & PERMISSI…
Object-Color Changes from Daylight to Incandescent Filament Illumination
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 , "Object-Color Changes from Daylight to Incandescent Filament Illumination," J. Opt. Soc. Am. 42, 435_4-435 (1952) Export Citation BibTex Endnote (RIS…
The Heat Sensitivity of Hevea Latex. I. The Action of Zinc-Ammonium Complexes
Abstract Among the different processes for heat-sensitizing latex by the more or less direct action of zinc-ammonium complexes, one has the choice of inorganic and organic complexes. Among the inorganic complexes, zinc-ammonium nitrate seems to be the most effective. Prepared from a 5 N solution of zinc nitrate and 5…
On the thermal decomposition of dolomite. IV.thermogravimetric investigation of the dolomite decomposition
Abstract The thermal decomposition of dolomite at various constant temperatures and carbon dioxide pressures has been investigated by the ‘loss‐of‐weight method.’ Depending on these conditions, dolomite can be decomposed either stepwise to magnesium oxide and calcium carbonate (‘half‐burnt dolomite’) with subsequent d…
On the use of antibiotics for isolating bacteria-free cultures of marine phytoplankton organisms
In the course of some studies on the kinetics of growth and the biochemical activities of a marine diatom it became desirable to obtain bacteria-free cultures. The classical method of obtaining such pure algal cultures involves either repeatedly washing single cells in sterile medium or obtaining discrete bacteria-fre…
Radiation effects in solids
As far as I am aware, this is the first invited session of the American Physical Society devoted to the topic of radiation effects in solids—a field that has been an active one for nearly a decade. I believe it is safe to say that it will not be the last such session. The long delay in this event arises, of course, fr…
Neutron Diffraction Study of the Crystal Structure of Ammonium Chloride
The crystal structure of the room-temperature phase of ammonium chloride has been determined by powder and single crystal neutron diffraction methods. The N---H links are directed essentially toward four of the eight surrounding chloride ions, and, contrary to a recent report, the two orientations fulfilling this cond…
Properties and Structures of Vitreous and Crystalline Boron Oxide1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties and Structures of Vitreous and Crystalline Boron Oxide1Kasimir Fajans and Stephen W. BarberCite this: J. Am. Chem. Soc. 1952, 74, 11, 2761–2768Publication Date (Print):June 1, 1952Publication History Published online1 May 2002Published inissue 1 June 1952https://p…
The System Alumina‐Gallia‐Water
A study of the system Al 2 O 3 –Ga 2 O 3 –H 2 O has resulted in the determination of equilibrium diagrams for the systems Al 2 O 3 –Ga 2 O 3 and Al 2 O 3 .‐H 2 O–Ga 2 O 3 .H 2 O. Extensive solid solution characterizes the α ‐Al 2 O 3 and β ‐Ga 2 O 3 structures at high temperatures, but it is shown that below 810°C. a…
Density, Expansivity, and Viscosity of Molten Alkali Silicates
The densities nd vi cositie of melts in the systems Li 2 O–SiO 2 , Na 2 O–SiO 2 , and K 2 O–SiO 2 were measured with a restrained sphere apparatus over the temperature range 1000° to 1400°C. At the higher temperatures in this range the density in each system decreased with increasing alkali content. On a mole basis th…
LX. The formation of immobile dislocations during slip
Summary Lomer has pointed out that certain dislocations on intersecting slip planes in the face centred cubic lattice can join to form new dislocations. It is now proposed that these new dislocations dissociate into groups of imperfect dislocations which cannot move because of the arrangement of their associated stack…