Solidification Structure of Gas-Atomized High-Speed Steel Powders
(1982). Solidification Structure of Gas-Atomized High-Speed Steel Powders. Powder Metallurgy: Vol. 25, No. 1, pp. 1-9.
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Influence of Alloying Elements in Hot Dip Galvanized High Tensile Strength Sheet Steels on the Adhesion and Iron-zinc Alloying Rate
The influences of 11 elements in sheet steel, temperature and Al content in zinc bath on the adhesion were investigated by use of continuous galvanizing line and laboratory galvanizing simulator. The adhesion was remarkably affected by Si in the steels, the temperature and Al content.The influences of Ti, Si and P in…
Impact Strength of Steel Plates Struck by Projectiles : Evaluation Formula for Critical Fracture Energy of Steel Plate
In order to clarify the strength of structures which require leak tightness, when struck by projectiles, a series of impact tests for steel plates have been carried out. Cylindrical, semi-spherical and conical-nosed SUS304 stainless steel projectiles were impacted onto carbon steel target plates 7∼38 mm thick. Test re…
Addition polyimide adhesives containing various end groups
Abstract Addition polyimide oligomers have been synthesized from 3,3′,4,4′‐benzophenone tetracarboxylic acid dianhydride and 3,3′‐methylenedianiline using a variety of latent crosslinking groups as end‐caps. The nominal 1300 molecular weight imide prepolymers were isolated and characterized for solubility in amide, ch…
Copper–Nickel Alloy for the Construction of Ship and Boat Hulls
The problems of high fuel bills, maintenance costs, and loss in performance are of continuing concern to all boat and ship owners, whatever the size of vessel. These problems can be technically and economically alleviated by the use of cupro-nickel for hull construction, as has been shown by considerable service exper…
The environmental scanning electron microscope and its applications.
An environmental scanning electron microscope can be made by incorporating a pressure limiting aperture at some distance below the objective aperture of an SEM, and by providing independent pumping between these two apertures. Tilting of the pressure limiting aperture with respect to the axis of the electron optics co…
Viscosity of concentrated protein solutions
The viscosity of solutions of four proteins (Bovine Serum Albumin, Ovalbumin, α s -1 Casein, Lysozyme), brought to the random coil conformation, has been measured over a large concentration range extending into the entanglement region. A master curve is obtained in the dilute and semi-dilute regions with the reduced v…
The crystal structure of antimony selenoiodide, SbSeI
The crystal structure of SbSeI has been determined with the intensities of 821 independent reflections, measured on a computer-controlled Philips PW 1100 single-crystal diffractometer. The cell constants, obtained by least-squares calculations from direct ∂ -value measurements on the diffractometer, are: a = 8.6862(9)…
Nannochloropsis gaditana spec. nov., una nueva Eustigmatophyceae marina
Se describe Nannochloropsis gaditana Lubién spec. nov., Eustigmatophyceae aislada de la Bahia de Cádiz, como resultado de los estudios sobre su morfología, ultraestructura, composición de pimentos y fisiología del crecimiento. N. gaditana se diferencia de las otras dos especies, N. oculata (Droop) Hibberd y N. salina…
Theoretical studies of the kaolin minerals : Electrostatic calculations
The kaolin minerals are not ideal ionic solids but, for many purposes, they can be treated as such. The classical ionic theory allows the calculation of the potential energy of these minerals. By minimizing the potential energy as a function of one or more parameters (distances, angles, etc.) one can determine hydroxy…
Le fer dans les kaolins. Étude par spectrométries RPE, Mössbauer, EXAFS
Seven kaolins were examined. Several phases containing iron were analysed by comparison of the used spectroscopies. Mössbauer spectroscopy shows that a part of the Fe²⁺ cannot be in the structure of kaolinite. At low temperature, we observe for one sample, presence of superparamagnetic particles of hematite and goethi…
Optimized three-component dye mixtures for achromatic guest-host liquid-crystal displays
We apply the matrix representation technique to determine the concentrations of three dye components in the liquid-crystal mixture needed to make a black-and-white guest-host display. This method employs the Newton-Raphson iterative process to match the tristimulus values of the mixture to the tristimulus values of th…
Electronic and resonance Raman spectra of mixed-valence, linear-chain complexes of platinum and palladium with 1,2-diaminocycloalkanes (N–N), [ M II (N–N) 2 ][ M IV (N–N) 2 X 2 ]X 4 (X = halogen)
The electronic and resonance Raman spectra of a series of halogen-bridged, linear-chain, mixed-valence complexes, [PtII(N–N)2][PtIV(N–N)2X2]X4[N–N = 1,2-diaminocyclohexane (dach); X = Cl, Br, or I], as well as of the complexes [PdII(dach)2][PdIV(dach)2Cl2]Cl4 and [PtII(N–N)2][PtIV(N–N)2Br2]Br4[N–N = 1,2-diaminocyclope…
Coordination and dispersion of Co2+ ions in CoO—MgO solid solutions
CoO–MgO solid solutions of CoO concentrations 0.25–15.3 mol % have been investigated by e.s.r. spectroscopy in the temperature range 4–77 K. The distribution of isolated Co2+ ions between octahedral and tetrahedral sites has been estimated quantitatively. In the most dilute solid solutions (up to 3.00 mol % CoO) Co2+…
Galvanomagnetic Effects in the Charge-Density-Wave State of 2H-NbSe2and 2H-TaSe2
The magnetoresistance and Hall coefficient in the charge-density-wave (CDW) state of 2 H -NbSe 2 and 2 H -TaSe 2 have been measured at low temperatures in magnetic fields up to 150 kOe, using high-quality single crystals. The results on these two compounds have been compared with those on 2 H -NbS 2 which has no CDW t…
Studies of acoustical absorption of flexible polyurethane foam
It was confirmed that one of the principal factors which influences the acoustical absorption of flexible polyurethane foam is flow resistance of foam. Normal polyester-based flexible polyurethane foam itself has an adequate value of flow resistance and shows fairly good sound absorption. Acoustical absorption of norm…
The structures of anorthite and albite melts.
The structures of anorthite and albite melts have been investigated with the X-ray diffraction method. The scattered intensities were measured at 1600°C and 1200°C on the anorthite and albite melts, respectively. The radial distribution function reveals that the basic structural units of the two melts are the TO4 (T=S…
Strong oxide-oxide interactions in silica-supported magnetite catalysts. 2. The core/shell nature of the interaction
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStrong oxide-oxide interactions in silica-supported magnetite catalysts. 2. The core/shell nature of the interactionCarl R. F. Lund and J. A. DumesicCite this: J. Phys. Chem. 1982, 86, 1, 130–135Publication Date (Print):January 1, 1982Publication History Published online1 Ma…
Radiation-induced conductivity in quartz crystals
Following room-temperature irradiation of quartz crystals by x rays or γ rays, a transient enhancement of electrical conductivity is observed which decays over a period of several hours. This enhanced conductivity is produced by alkali ions (M+) which are liberated during the irradiation. By freezing in this transient…
Organisation of feather keratin genes in the chick genome
A genomic clone containing sequences of five feather keratin genes has been isolated using cDNA to chicken embryonic feather keratin mRNA as a probe. The clone probably represents part of a longer cluster of tandemly spaced genes; the genes are evenly spaced with a centre to centre separations of 3.3 kb and are transc…