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Bibliography
Un indicador de nivel para silos
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Influencia que ejerce al hidróxido cálcico del cemento y su evolución durante los fenómenos de la hidratación, sobre la resistencia de morteros y hormigones expuestos a la corrosión
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Photovoltaic Effect and Photoconductivity in Laminated Organic Systems
As a result of a wide variety of studies on photosynthesis in living plants and plant fragments, together with the development of photosensitive, photovoltaic junctions in inorganic crystals and the discovery and exploration of semiconduction in organic molecular substances, a suggestion has been made that the primary…
Photoemissive, Photoconductive, and Optical Absorption Studies of Alkali-Antimony Compounds
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…
The decomposition of magnesium hydroxide in an electron microscope
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…
Electroluminescence of ZnS Single Crystals with Cathode Barriers
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.…
Ammonium Hydrogen Sulfate: A New Ferroelectric with Low Coercive Field
(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 $\mathrm{Pc}$…
The Behavior of Fission Products in Molten Fluoride Reactor Fuels
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…
Salt Effect Correction in Determining Soluble Silica in Sea Water by Silicomolybdic Acid Method
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…
Infrared Study of Some Structural Changes in Natural Rubber during Vulcanization
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…
Hall Effect in Lu, Yb, Tm, and Sm
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 Boron Carbide for Reactor Control
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.
Fractures Produced by Stress Pulses in Glass-like Solids
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…
30—THE RADIAL DISTRIBUTION OF FIBRES IN BLENDED YARNS: Part I—Characterization by a Migration Index
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…
THE FLOW PROPERTIES OF STARCH POWDERS AND MIXTURES
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…
The X‐ray diffraction, birefringence, and infrared dichroism of stretched polyethylene. III. Biaxial orientation
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…