Materials Literature
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By means of absorption and photoconductivity measurements, the following band gaps were found: ${\mathrm{Na}}_{3}$Sb---1.1 ev; ${\mathrm{K}}_{3}$Sb---1.1 ev; ${\mathrm{Rb}}_{3}$Sb---1.0 ev; ${\mathrm{Cs}}_{3}$Sb---1.6 ev; and ${(\mathrm{NaK})}_{3}$Sb---1.0 ev. A model has been derived for the photoemission from these…
Abstract The beam of an electron microscope has been used to dehydrate single crystals of magnesium hydroxide to magnesium oxide. Electron diffraction photographs and electron micrographs were taken at various stages to follow the crystallographic and morphological changes which accompany decomposition. The decomposit…
Certain ZnS crystals show electroluminescence predominantly near the cathode. The major emission from Cu-activated crystals occurs as a burst of light when the exciting voltage is suddenly removed, as electrons flowing back toward the cathode to neutralize the barrier charge recombine with ionized luminescent centers.…
(N${\mathrm{H}}_{4}$)HS${\mathrm{O}}_{4}$ is ferroelectric in the temperature range between -3\ifmmode^\circ\else\textdegree\fi{}C and -119\ifmmode^\circ\else\textdegree\fi{}C. The symmetry of the room-temperature phase is $\frac{P{2}_{1}}{c}$; the ferroelectric phase is also monoclinic, with space group $\mathrm{Pc}$…
Observations are reported on the behavior of several fission product elements in molten NaF-ZrF4-UF4 fuels, irradiated in capsule experiments, forced-convection in-pile loop experiments, and in the Aircraft Reactor Experiment (ARE). The rare gases have been observed to escape readily from the fuels in dynamic tests, a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSalt Effect Correction in Determining Soluble Silica in Sea Water by Silicomolybdic Acid MethodG. S. BienCite this: Anal. Chem. 1958, 30, 9, 1525–1526Publication Date (Print):September 1, 1958Publication History Published online1 May 2002Published inissue 1 September 1958htt…
Abstract A knowledge of the structure of vulcanized rubber is essential to the interpretation of vulcanization and oxidation studies and the physical properties of the material. In the present work an infrared study has been made of structures resulting from a number of different methods of vulcanization. Sulfur vulca…
The Hall effect in Lu, Yb, Tm, and Sm has been studied as a function of temperature for the temperature range 40\ifmmode^\circ\else\textdegree\fi{}K to 320\ifmmode^\circ\else\textdegree\fi{}K in a magnetic field of 5500 oe. The Hall coefficient for Yb is positive, while the Hall coefficients for Lu and Tm are negative…
The use of B4C for the control of a sodium-cooled reactor is considered from a design standpoint. Nuclear, mechanical, and physical properties as well as irradiation data are presented. The ability of the B4C lattice structure to retain helium produced from the neutron capture of B10 is discussed.
Measurements have been made of the amplitudes of the maximum tensile stress pulses which could propagate along rods of glass and of two glasslike plastics (polystyrene and polymethylmethacrylate) without producing fracture. Small quantities of explosive were detonated at one end of the rod so that a compression pulse…
A method is described whereby any preferential radial distribution of a particular fibre component in a blended yarn, relative to the yarn axis, may be measured and represented by a single numerical parameter, termed the Migration Index. The migration index is based on zoned fibre counts taken on a suitable number of…
Abstract The addition of small proportions of fine powders, particularly magnesium oxide, to maize starch, alters its flow properties in a manner which is contrary to the generally observed effects for fine powders. A measure of this effect is obtained by the angle of repose method and the disposition of the two compo…
Abstract A set of functions for characterizing the crystal orientation in a biaxially oriented crystalline polymer is proposed. The additional orientation functions may be determined from a measurement of the variation of x‐ray intensity with tilt angle of a film. From these functions and those described in Part II, t…
Abstract Commerical waxes whose melting points, refractive indexes and numbers of side chains are within the ranges described seem likely to give good ozone protection under static conditions. All waxes lead to worse cracking under dynamic conditions than if none had been included and it is clearly better to use no wa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange of Oxygen Atoms among Carbon Dioxide, Carbon Monoxide and Oxide Catalysts of Spinel TypeYukio Yoneda, Shoji Makishima, and Katsuyoshi HirasaCite this: J. Am. Chem. Soc. 1958, 80, 17, 4503–4507Publication Date (Print):September 1, 1958Publication History Published on…
During the past few years there has been a rapid development in the chemical technology of epoxy resins. Currently, these resins are being widely manufactured and are available under a variety of trade names. Industrially the epoxy resins are important for use in corrosion-resistant surface coatings, molding compounds…
Abstract The rate of absorption of nitrogen peroxide into water at 25° and 40°C. has been found to be a linear function of the concentration of nitrogen tetroxide in the gas phase and directly proportional to the interfacial partial pressure of the same species. The rate of absorption is independent of gas velocity ov…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProducts of "Low-iron Fermentation" with Bacillus subilis: Isolation, Characterization and Synthesis of 2,3-Dihydroxybenzoylglycine1,2Takeru Ito and J. B. NeilandsCite this: J. Am. Chem. Soc. 1958, 80, 17, 4645–4647Publication Date (Print):September 1, 1958Publication Histor…
Kyoji Kinoshita, Hidehiko Ishikawa, K\={o}z\={o} Shinoda; Solubility of Alcohols in Water Determined the Surface Tension Measurements, Bulletin of the Chem
Mueller's phenomenological theory of Rochelle salt, NaK${\mathrm{C}}_{4}$${\mathrm{H}}_{4}$${\mathrm{O}}_{6}$\ifmmode\cdot\else\textperiodcentered\fi{}4${\mathrm{H}}_{2}$O, has been generalized, and the properties of the clamped crystal described. A local field theory of the clamped crystal has been developed on the b…