Materials Literature
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Demagnifying EPS have the capacity to generate as much as 5000 line pairs per diameter at a resolution as small as 0.1 μ. The diameter of the recorded image and the maximum number of line pairs per diameter decrease with increasing values of the chromatic field aberrations of the lens system, and with increasing relat…
An experimental study has been made of magnetic hysteresis in plastically deformed and annealed gadolinium (Gd) metal as a function of annealing temperature. Seven plastically deformed samples were annealed at temperatures ranging from 155° to 916°C; major and minor magnetic hysteresis loops of these seven samples plu…
An analysis of three-dimensional asymmetric field distribution in SF6 gas insulated cables is shown. The equations to be used in the calculation are derived drecty from Gauss' theorem, and this procedure is quite simple. The field problems in the cables with epoxy pole spacers are solved by digital computer. The solut…
The optimization of the performance of a high-brightness electron gun requires the correct choice of material, and LaB6 has been shown to have advantages over pure metal emitters. The finely pointed tip must be accurately positioned in the grid aperture to achieve maximum brightness and the electrode positions must be…
Article The crystal structure of magnesium paratungstate, Mg5H2W12O42-38H2O was published on November 1, 1973 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 137, issue 1-6).
A new high-resolution electron probe has been built for scanning microscopy studies. The probe has a final lens with a focal length of 0.8 mm, a spherical aberration coefficient; of 0.4 mm, and a chromatic aberration coefficient of 0.5 mm. A lanthanum hexaboride cathode is employed with a maximum brightness of 1.5×107…
Abstract The mucosal protective and antiflatulent properties of polydimethylsiloxane (PMS) alone, or containing free silica have been examined in rats. Both PMS and PMS + 6% silica significantly protected rat gastric mucosa from the irritant effects of aspirin but there was no significant difference between the protec…
Abstract The expressions for matrix elements of spin‐independent operators F and G with the use of Young operators are obtained in the case of arbitrary nonorthogonalized orbital configuration, including both singly and doubly filled orbitals and corresponding to the definite value of total spin. The formulas obtained…
SUMMARY Rabbits given lead acetate, cadmium chloride, or mercuric chloride in their drinking water for 70 days and then inoculated with pseudorabies virus (3 doses, 7 days between doses) as antigen had significantly lower neutralizing antibody titers than did the controls. The titers were determined by the plaque assa…
Twinning has been studied in several samples of VO2 containing in substitution solid solution 0.5 and 2.5 at.% Cr. The twinning is by reticular pseudo-merohedry and it is controlled by the tetragonal pseudo-symmetry of a superlattice obtained from the original monoclinic cell (a ≃ 9.1, b ≃ 5.8, c ≃ 4.5 Å, β ≃ 90°) by…
Abstract The chemistry of the cement‐forming reaction between a fluorine‐containing calcium aluminosilicate glass and aqueous solutions of poly(acrylic acid) has been studied using infrared spectroscopy and classical chemical procedures. It was concluded that calcium, aluminium and fluoride ions were leached from the…
Groups that are a generalization of magnetic groups, and called 'spin groups', are defined. Among the spin groups those called 'spin translation groups' are tabulated and described in some detail. The possible magnetic reflexions of unpolarized neutrons elastically scattered from a single crystal whose spin arrangemen…
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-.
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…
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 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 (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…
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…
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…
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…