Experiments and void correlation for PWR small-break LOCA conditions
S>From joint meeting of the American Nuclear Society and the Atomic Industrial Forum and Nuclear Energy Exhibition; San Francisco, California, USA (11 Nov 1973). See CONF-731101-.
Materials Literature
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Hydroformylation of methyl oleate with a recycled rhodium catalyst and estimated costs for a batch process
Abstract Methyl oleate was hydroformylated to methyl formylstearate at 120 C and 850–900 psig with a 1:1 mol mixture of hydrogen and carbon monoxide. In the presence of triphenylphosphite, an activated rhodium‐on‐alumina catalyst produced an essentially quantitative conversion in about 40 min. Filtration followed by d…
Über Erdalkalimetalloxogallate. V. Die Kristallstruktur von monoklinem CaGa2O4
Abstract Von der monoklinen Modifikation der Verbindung CaGa 2 O 4 wurden Einkristalle dargestellt und ihre Kristallstruktur mit Diffraktometer‐Röntgendaten bestimmt; a = 7,992, b = 8,830, c = 10,585 Å, β = 94,72°, Raumgruppe C —P2 1 /C. Ebenso wie die orthorhombische stellt auch die monokline Modifikation einen weite…
The Pathway of Exogenous and Endogenous Carbohydrate Utilization in Escherichia coli: A Dual Function for the Enzymes of the Maltose Operon
The components of the maltose‐utilizing system in Escherichia coli ML, i.e. maltose permease, amylomaltase and maltodextrin phosphorylase, were re‐investigated, with the following findings: The concentrating mechanism (permease) is the rate‐limiting step in the maltose‐utilizing system. Maltose and higher maltodextrin…
Stress Corrosion Cracking of Iron and Nickel Base Alloys in Sulfate Solutions at 289 C
Stress corrosion cracking (SCC) of iron and nickel base alloys in aqueous solutions at 289 C (552 F) has been studied using a straining electrode apparatus. Cracking susceptibility decreases in the order sensitized stainless steel, cold worked stainless steel containing martensite, sensitized Inconel 600, annealed sta…
The short-range structure of Ti and Zr b.c.c. solid solutions containing the ω phase. I. General diffraction theory and development of computational techniques
Certain Ti and Zr solid solutions containing the ω phase exhibit intensity distributions in reciprocal space which are partly diffuse. In an effort to understand the structural meaning of these diffraction patterns, we have developed new methods for the evaluation of the kinematic intensity sum for certain kinds of at…
Nature mineralogique et origine des glauconies du plateau continental du Gabon et du Congo
RÉSUMÉ Sur le plateau continental du Congo et du Gabon, on constate la formation de goethite, de berthiérine et de glauconies (smectite et glauconite). La berthiérine caractérise un milieu deltaïque a sedimentation active; les glauconies se forment sur le plateau continental à plus grande profondeur (—50à—300m). Dans…
Effect of Iron Oxide on the Sintering Kinetics of Al 2 O 3
Alumina powders with varying iron oxide contents were prepared by coprecipitation. The powders were spheroidized by passing them through an oxygen‐acetylene flame. The spheres were sized, annealed, and sintered in air and in N 2 with 132 ppm O 2 . Isothermal studies were combined with constant‐rate‐of‐heating studies…
Determination of atomic stress distribution in stressed polymers by infrared spectroscopy
Abstract An attempt was made to evaluate stresses on chemical bonds in axially stressed polymers from the shift of skeletal vibration frequencies in chain molecules. The maximum stress on chemical bonds was found to be at least ten times the average stress on the specimen.
Ferroelectric Domain Structure of Tri-Glycine Sulfate Observed Using a Scanning Electron Microscope
Domain structures in the (010) plane are investigated in the secondary electron mode of S.E.M. The long axis of typical lenticular domains in crystals as grown is along the direction nearly perpendicular to the crystallographic c -axis. Fine lamellar structures appearing in annealed crystals are also along the same di…
Laser action from Ho<sup>3+</sup>, Er<sup>3+</sup>, and Tm<sup>3+</sup>in YAlO<inf>3</inf>
Laser action has been observed for the following rare-earth ions in YAlO3:Ho3+(sensitized with Er3+and Tm3+), Er3+, and Tm3+(sensitized with Er3+) at wavelengths of 2.123, 0.851, and 1.861 μm, respectively. Measurements of spectroscopic properties, fluorescence kinetics, and laser performance of these ions in YAlO3are…
Transient behavior of the electrically controlled birefringence in a nematic liquid crystal
An homeotropic cell is built with a thin layer (5–25 μm) of nematic liquid crystal such as MBBA sandwiched between two indium oxide coated glass plates. The transient behavior of the cooperative angular variation of molecules submitted to an electric field step is studied theoretically. Experimental results are obtain…
Aging and degradation of polyolefins. I. Peroxide‐initiated oxidations of atactic polypropylene
Abstract Efficiencies of polymer radical production by thermal decomposition of di‐ tert ‐butylperoxy oxalate (DBPO) have been measured in bulk atactic polypropylene (PP) at 25–55°C; they range from 1 to 26%, depending on [DBPO], temperature, and presence of oxygen. Most of the polymer radicals thus produced dispropor…
Auger electron spectroscopy
Auger spectroscopy has progressed from its initial use as a purely research tool to that of an analytical technique of general application wherever information about the composition of non-volatile surfaces is important. This, article describes the underlying physics of the Auger process and the instrumentation involv…
Cambridge Crystallographic Data Centre. IV. Preparation of "Interatomic Distances 1960-65"
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCambridge Crystallographic Data Centre. IV. Preparation of "Interatomic Distances 1960-65"F. H. Allen, N. W. Isaacs, Olga. Kennard, W. D. S. Motherwell, R. C. Petterson, W. G. Town, and D. G. WatsonCite this: J. Chem. Doc. 1973, 13, 4, 211–218Publication Date (Print):Novembe…
Inhibition of Ribonuclease Activity by Bentonite
The inhibition of ribonuclease activity by bentonite and the adsorption of the protein molecule within the clay matrix were assessed by enzyme and X-ray diffraction analysis, respectively.Pretreatment of bentonite with EDTA, potassium, barium, and barium–EDTA caused varying expansion of the d(001) spacing of the clay.…
Activation Energy for the Corrosion of Iron in H2SO4
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation DAN ALTURA, KEN NOBE; Activation Energy for the Corrosion of Iron in H2SO4. CORROSION 1 November 1973; 29…
Nuclear magnetic relaxation in molten salts. I. Spin-lattice relaxation time of 23Na in molten sodium nitrate
The spin-lattice relaxation time (T1) of 23Na in molten sodium nitrate has been measured at 8.0 and 22.3 MHz from the melting point (309°C) to 600°C using a pulse spectrometer. T1 was found to be independent of frequency over this range and equal to about 50 × 10−3 sec. 1/T1 was a linear function of 1/D (where D is th…
Mechanical relaxations of poly(vinylidene fluoride) and some of its copolymers
Abstract The dynamic mechanical properties of poly(vinylidene fluoride) have been studied under isochronal conditions and the effect of thermal treatment examined. The results are compared with a product of different molecular weight distribution. The study also included the mechanical relaxation spectra of copolymers…
A Variation of the Sulfide Contraction Procedure for Synthesis of Corrinoid Systems
<em>Angewandte Chemie International Edition in English</em> is one of the prime chemistry journals in the world, publishing research articles, highlights, communications and reviews across all areas of chemistry.