Materials Literature
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In careful experiments by Dyke and his co-workers it has been observed that the field-emission currents from tungsten and barium-on-tungsten emitters were progressively reduced below that expected from the Fowler-Nordheim law as the field was increased. These effects were attributed to electron space charges in the ne…
A brief derivation of formulas for the transmittance of flat plates, uncoated and coated, is presented. Data showing the increased near infrared transmittance of seven flat samples resulting from quarter-wave coatings of MgF2 and LiF on their surfaces is presented. Five were coated to maximize transmittance for a wave…
Ei-ichi Shimazaki, Tsuguyasu Wada; Vapor Pressure of Germanium Monosulfide, Bulletin of the Chemical Society of Japan, Volume 29, Issue 3, 1 March 1956, Pa
At the 222-kev resonance in the reaction ${\mathrm{Mg}}^{24}(p, \ensuremath{\gamma}){\mathrm{Al}}^{25}$, a 2.05\ifmmode\pm\else\textpm\fi{}0.02-Mev gamma ray in cascade with one of 0.454\ifmmode\pm\else\textpm\fi{}0.005 Mev, and a 1.56\ifmmode\pm\else\textpm\fi{}0.03-Mev gamma ray in cascade with one of 0.97\ifmmode\p…
The soiling and crushing characteristics of nylon, Dacron, 2 Orlon, 3 Saran, Dynel, acetate, wool, and smooth viscose, as well as the 50/50 blends of the synthetics and wool with smooth viscose were studied in Axminster carpets. Soiling properties are shown to be related to the fiber surface smoothness and avail able…
Abstract The rates of nitration of benzene by nitric acid in mixed acid to produce mononitrobenzene have been measured in well‐emulsified reaction mixtures in the temperature range from 34° to 54°C. The acid‐phase compositions ranged from 1.6 mole % nitric acid and 27 mole % sulfuric acid to 35 mole % nitric acid and…
A remotely operated facility for the study of reacting metal assemblies with thick reflectors is described. Design of the assembly machine permits adaptation to nuclear components of various materials and geometries. Data resulting from experimental programs on the behavior of reflected critical assemblies can be appl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFriction Factors for Flow Non-Newtonian Materials in PipelinesRuth N. WeltmannCite this: Ind. Eng. Chem. 1956, 48, 3, 386–387Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue 1 March 1956https://pubs.acs.org/doi/10.1021/ie5…
Current versions of two methods commonly used for the determination of tearing strength require clarification regarding treatment of the data obtained and revision to accommodate newer types of inertialess testing machines. Experimental information, providing the necessary background data, has been obtained. Sixteen f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChanges in Physical Properties of Graphitized Carbon Rods upon Gasification with Carbon DioxideP. L. Walker Jr. and Emile RaatsCite this: J. Phys. Chem. 1956, 60, 3, 364–369Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue…
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 W. Spindel, T. I. Taylor; Preparation of 99.8% Nitrogen‐15 by Chemical Exchange. J. Chem. Phys. 1…
The purpose of this research was to evaluate the use of single-fiber testing methods for the determination of cotton fiber properties and for the prediction of yarn quality. Samples of unprocessed cotton, finisher drawing sliver, and 36's carded yarn were ob tained for 21 domestic cotton varieties representing extreme…
Abstract The kinetics of the copolymerisation of methylmethacrylate and maleic anhydride have been examined at 60°C. The reactivity ratios have been determined by analytical and radioactive techniques and are r 1 = 3.5 and r 2 = 0.03. Radioactive azoisobutyronitrile has been used as initiator; the rate and efficiency…
Oxide films on stainless steels have been classified into three types according to film thickness, film structure, film composition, and influence of the film on resistance to corrosion. Compositional properties of oxide films isolated from surfaces of stainless steels were studied using specially developed microanaly…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical Properties of Eight High-Purity NitroparaffinsEmory E. Toops Jr.Cite this: J. Phys. Chem. 1956, 60, 3, 304–306Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue 1 March 1956https://pubs.acs.org/doi/10.1021/j150537a0…
The electrical resistivity and Hall coefficient of a semiconducting diamond (Type IIb) have been measured between - 100°C and 600°C using standard d.c. methods. The diamond behaves like a normal p-type semiconductor. At 20°C its resistivity is 270 ohm cm and the Hall mobility of the holes is 1550±150 cm 2 volt -1 sec…
Abstract Although vacuum crystallizers are used widely, crystal‐size–control methods have not been adequately analyzed. This paper supplies in part the deficiency of technical information on this problem. Industrial crystallizers may have inherent nucleation rates in excess of or below the seed‐crystal requirement for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCausticization of Carbonate SolutionsF. E. Littman and H. J. GaspariCite this: Ind. Eng. Chem. 1956, 48, 3, 408–410Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue 1 March 1956https://pubs.acs.org/doi/10.1021/ie51398a020ht…
In order to evaluate the possible role of radioactive particles from an atomic cloud as condensation nuclei, an analysis has been made to determine their degree of ionization. Individual radioactive particles become ionized due to β emission, and an estimate of the half-life of these ions has been made for various tim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared Absorption Spectra of Inorganic Coördination Complexes. VIII. Normal Vibrations of Tetracyanoplatinate(II) Ion1D. M. Sweeny, Ichiro Nakagawa, San-Ichiro Mizushima, and J. V. QuaglianoCite this: J. Am. Chem. Soc. 1956, 78, 5, 889–892Publication Date (Print):March 1,…