Materials Literature
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Abstract The platinum‐catalysed autoxidation of ethanol in water has been studied with 18 O as a tracer. The reaction product was isolated as barium acetate and converted t o CO 2 for mass‐spectrometric 18 O analysis. It is found that the 18 O from O 2 gas is not significantly incorporated into the product but with H…
Electrical conductivity of carbon black‐reinforced elastomers at fixed loading is a function of the particle size and aggregation habit of the carbon black, its intrinsic conductivity, and the ability of the black to adsorb certain ionic impurities. These factors vary greatly in their relative importance, depending on…
A quarter-wave transformer to match the junction between an empty waveguide and one completely filled with a dielectric may be made from a waveguide partially filled with dielectric. A method of designing such a transformer, when all the waveguides have the same cross-section, is described, and experimental results ar…
The effects of certain impurities on the room temperature ductility of chromium have been investigated. Results indicate that nitrogen in amounts <0.01% raises the bend transition temperature of annealed material above room temperature. No effect of oxygen on the ductility in amounts <0.3% was found. Sulfur in amounts…
1. The field observations on the vegetation and sexuality of Codium fragile have been made for several years during 1940-1949 and 1951-1953 in the central region of the Pacific coast of Japan.The young plants begin to appear during early winter and spring, then they become luxuriant during early summer and late autumn…
A method is described for determining the corona-starting voltage in air-solid dielectric systems when the thickness and the dielectric constants are known. The method is derived by applying data from Paschen's law to the theoretical distribution of a voltage potential between air and a solid insulation. Two procedure…
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The behavior of metals and alloys under neutron irradiation in a reactor is investigated. An explanation of how damage originates from the collision and absorption of neutrons by nuclei, and a description of the behavior of the fast ions, produced from these neutron encounters, as they penetrate the surrounding materi…
Equipment is described for impact testing of yarns longitudinally and also transversely. The impact velocities range from 1000 to 10,000 ft per min. The corresponding rates of straining at impact range from 50,000 to 500,000 per cent per min for textile yarns. The impact events are recorded with a high-speed motion pi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Preparation of Monobromosilane and Organic Silyl DerivativesHerman E. Opitz, John S. Peake, and W. H. NebergallCite this: J. Am. Chem. Soc. 1956, 78, 2, 292–294Publication Date (Print):January 1, 1956Publication History Published online1 May 2002Published inissue 1 Janua…
Co was oxidized from 800° to 1200°C in 0.013–27.2 atm O 2 . It oxidized in accordance with the parabolic rate law above 950°C and formed the single oxide, , above 900°C. Pressure increase accelerated the rate of oxidation. However, the oxidation rate eventually ceased to increase with increase of oxygen pressure at te…
F. H. Pollard, H. S. B. Marshall and A. E. Pedler, Trans. Faraday Soc., 1956, 52, 59 DOI: 10.1039/TF9565200059
Experimental results are reported of the magnetic properties of NiTe x , where x is the molal content of tellurium. When 0.1≤ x ≤0.65, this substance is found to be ferromagnetic; the variations with composition of the saturation magnetization and of the Curie temperature show evidences of a transition at x =0.33 (27…
The frequency-response method is well established in the analysis of control systems and networks, but has hitherto not been extensively used for analysing rotating machines. The method is of particular value When the magnetic circuit of the machine contains unlaminated iron in which eddy currents are set up when the…
Magnesium anodes were electrolyzed in 3% solution in a simple electrolysis cell. Mg in the anolyte, Mg in the corrosion product, total hydrogen evolved, and weight loss were determined. It was found that the quantities soluble Mg, insoluble Mg, Mg calculated from the current passed were in approximate one to one relat…
A new method of suspending a molten zone is as follows: clamp a horizontal cylindrical ingot at both ends; apply a horizontal magnetic field normal to the ingot where the zone is to be suspended; and pass a direct current through the ingot, creating an upward force equal and opposite to the gravitational force, thereb…
A preliminary study of the anomalies for coarse infrared reflection gratings (d=10.5μ) in the visible reveals the presence of many extremely strong anomalies for both the S and P polarization. The anomalies correspond, in some cases, to passing off orders as high as 42. Within experimental error the positions of the a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSugar Crystallization, X-Ray Diffractometer and Microscopic Investigation of Crystallization of Amorphous SucroseK. J. Palmer, W. B. Dye, and Dale BlackCite this: J. Agric. Food Chem. 1956, 4, 1, 77–81Publication Date (Print):January 1, 1956Publication History Published onli…
L. A. Woodward and A. A. Nord, J. Chem. Soc., 1956, 3721 DOI: 10.1039/JR9560003721