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Agostinelli, J.A.; Hung, L.S.; Mir, J.M.
Eastman Kodak Co., Rochester, NY (United States)1992
Eastman Kodak Co., Rochester, NY (United States)1992
AbstractAbstract
[en] This patent describes an article comprised of a substrate bearing a conductive film. It comprises: grains of crystalline bismuth mixed alkaline earth copper oxide, characterized in that silver is present in the conductive film in a concentration of 1 to 20 percent, based on copper, the surface of the substrate bearing the film is substantially inert toward the film and is a crystalline perovskite, alkaline earth oxide, noble metal, zirconia or alumina, and the metal components of the oxide satisfy at least one of the following metal relationships
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2 Jun 1992; 17 Jul 1991; 10 p; US PATENT DOCUMENT 5,118,662/A/; Available from Patent and Trademark Office, Box 9, Washington, DC 20232 (United States); ?: 17 Jul 1991
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Patent
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AbstractAbstract
[en] This patent describes a circuit element. It comprises: an insulative substrate presenting first and second parallel major surfaces, a first means for providing a conductive path between at least two locations on the first major surface including a thick film conductor having a thickness of at least 5 μm, a second means for providing a conductive path between at least two locations on the second major surface including a thick film conductor, and a third means for providing a conductive path between the first and second conductive path means
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13 Mar 1990; 1 Jul 1987; vp; US PATENT DOCUMENT 4908346/A/; Patent and Trademark Office, Box 9, Washington, DC 20232 (USA); ?: 1 Jul 1987
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Patent
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AbstractAbstract
[en] The synthesis, characterization and application of 2-(2-hydroxybenzylidenimine) benzene-arsonic acid (HBBA) as a reagent for the fluorimetric determination of boron are described. This reagent reacts with boric acid in 85% w/w sulphuric acid medium to yield a fluorescent compound. The reagent is not fluorescent in those conditions. Heating at 900 for 45 min is needed for the compound to be formed. The linear calibration range is 0.1-8 μg/ml in the solution measured. The detection limit of the method is 0.01 μg/ml. The method has been applied to determine boron in vegetal material. (author)
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Journal Article
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Strom, L.A.; Carnall, E. Jr.; Ferranti, S.A.; Mir, J.M.
Eastman Kodak Co., Rochester, NY (United States)1992
Eastman Kodak Co., Rochester, NY (United States)1992
AbstractAbstract
[en] This patent describes a process of forming an electrical conductor on a substrate capable of withstanding processing temperatures. It includes forming on the substrate a coating of a precursor of a crystalline electrical conductor chosen from the group consisting of a rare earth alkaline earth copper oxide and a heavy pnictide mixed alkaline earth copper oxide and converting the precursor to the crystalline electrical conductor by heating, characterized by the steps of preparing a solution comprised of volatilizable aqueous solvent and, as a solute, inorganic salts forming metal-ligand compounds of each of the metals forming the crystalline electrical conductor, the proportions of the solute metals corresponding to those present in the precursor coating and the ligands being inorganic ligands chosen to be volatilizable on heating, and spraying the aqueous solution to form discrete liquid particles each containing the metal as metal-ligand compounds in proportions corresponding to those present in the precursor coating
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Source
11 Feb 1992; 20 Jul 1990; vp; US PATENT DOCUMENT 5,087,607/A/; Patent and Trademark Office, Box 9, Washington, DC 20232 (United States); ?: 20 Jul 1990
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Patent
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AbstractAbstract
[en] A spectrophotometric method for the determination of boron after its extraction into toluene containing 2-methylpentane-2,4-diol has been developed. In a portion of the extract boron is determined spectrophotometrically at 460 nm in N,N-dimethylformamide medium after formation of the 8-hydroxy-1-(2-hydroxy-1-naphthylmethyleneamino)naphthalene-3,6-disulphonic acid - boron complex, in 40% glacial acetic acid, which has been heated at 80 deg C for 60 min. The molar absorptivity is 1.54 x 103l mol-1 cm-1 and the range is linear between 1 and 10 μg ml-1 of boron. Interferences have also been studied. (author)
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Journal Article
Journal
Analyst; ISSN 0003-2654; ; v. 109(9); p. 1155-1157
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AbstractAbstract
[en] The azomethine derivatives 8-hydroxy-1-(2-hydroxy-1-naphthylbenzylideneamino)naphthalene-3,6-disulphonic acid (HSNHB) and 8-hydroxy-1-(2-hydroxy-1-naphthylmethyleneamino)naphthalene-3, 6-disulphonic acid (HSNHN) were synthesised. HSNHB gives no colour reaction with boric acid, but HSNHN reacts with boric acid and produces a compound with maximum absorbance at 445 nm (pH 4) in a 30% V/V methanol-water solution. Beer's law is obeyed between 0.25 and 2 μg ml-1 of boron. The molar absorptivity at 445 nm is 8700 l mol-1 cm-1. Interferences from Fe3+, Al3+ and Cu2+ are avoided by adding EDTA. This method has been applied to the determination of boron in natural waters and vegetable matter with good accuracy. (author)
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Journal Article
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Analyst; ISSN 0003-2654; ; v. 110(1); p. 61-64
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Mir, J.M.; Agostinelli, J.A.; Peterson, D.L.; Paz-Pujalt, G.R.; Higberg, B.J.; Rajeswaran, G.
Eastman Kodak Co., Rochester, NY (United States)1991
Eastman Kodak Co., Rochester, NY (United States)1991
AbstractAbstract
[en] This patent describes an article comprised of a substrate and an electrically conductive layer located on the substrate characterized in that the electrically conductive layer is comprised of greater than 45 percent by volume of a crystalline rare earth alkaline earth copper oxide exhibiting a ratio of metals satisfying (Ia) or (IIa) effecting crystal growth by heating in the temperature range of from 975 degrees to 1059 degrees c., and cooling the coating in the presence of oxygen at a rate of less than 25 degrees C per minute until it reaches a temperature of from 550 degrees to 450 degrees C
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3 Dec 1991; 27 Mar 1989; vp; US PATENT DOCUMENT 5,070,072/A/; Patent and Trademark Office, Box 9, Washington, DC 20232 (United States); ?: 27 Mar 1989
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Patent
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Mir, J.M.; Agostinelli, J.A.; Peterson, D.L.; Paz-Pujalt, G.R.; Higberg, B.J.; Rajeswaran, G.
Eastman Kodak Co., Rochester, NY1989
Eastman Kodak Co., Rochester, NY1989
AbstractAbstract
[en] This patent describes a process of preparing an article comprised of a substrate and a crystalline electrically conductive rare earth alkaline earth cooper oxide coating on the substrate exhibiting a Tc in excess of 30 degrees K. It comprises: choosing the substrate from the class consisting of strontium titanate, magnesia, and alumina; applying to the substrate a coating of a solution. The solution consisting essentially of a volatilizable film forming solvent, metal-ligand compounds of each of rare earth and alkaline earth containing at least one thermally volatilizable organic ligand, and at least one cooper-ligand compound containing a thermally volatilizable carboxylate ligand; removing the solvent and organic ligands from the substrate by heating in the presence of oxygen to form a coating of less than 1μm in thickness; and forming a crystalline conductive metal oxide coating on the substrate by heating to a temperature in the range of from 900 degrees to 1100 degrees C followed by contract with air or an oxygen enriched atmosphere during cooling
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Source
4 Nov 1989; 4 May 1987; vp; US PATENT DOCUMENT 4880770/A/; U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $1.50; ?: 4 May 1987
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Patent
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AbstractAbstract
[en] An improved method is proposed for the determination of boron in waters. The esterification reaction between boric acid and methanol in a concentrated sulphuric acid medium and the vaporisation of the methyl borate formed (boiling-point, 68 C) are used in the determination by boron by measuring the emission of the BO2 radical at 548 nm. This reaction is carried out in a simple and inexpensive generator, designed for this purpose, and the heat developed in it causes the rapid volatilisation of the methyl borate. Thus no collection systems or carrier gas are required. The proposed method gives an improved detection limit and it can be applied to the determination of boron in water samples. It is both rapid and highly selective. (author)
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Journal Article
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[en] Interactions between superconducting Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+//sub x/ films and substrates were investigated by ion backscattering, x-ray diffraction, and four-point probe resistivity measurements. During annealing at temperatures above- 800 /sup 0/C, Bi/sub 2/Sr/sub 2/CaCu/sub 2/ oxide films rapidly reacted with alumina, Si, Si covered with SiO/sub 2/, and quartz, resulting in catastrophic failure. Zr-based barrier layers were used to minimize film-substrate interactions. When a single ZrO/sub 2/ layer was interposed between the superconducting oxide film and the underlying substrate, the Bi/sub 2/Sr/sub 2/CaCu/sub 2/ oxide films showed a large-grained polycrystalline microstructure and exhibited the orthorhombic structure. Films on sapphire showed transitions to the superconducting state beginning near 100 K with zero resistance achieved at 70 K. Films on Si and thermally grown SiO/sub 2/ showed a similar drop in resistance around 95 K, whereas the transition was broad and the zero resistance state was not reached. For films on quartz, high thermal stress caused cracking of the superconducting oxide film. Best results were achieved using a barrier composed of a Zr-Si-O mixed layer underneath ZrO/sub 2/. In this case, the films grown on Si and quartz were uniform and showed the onset to superconductivity at 95 K, attaining zero resistance at 70 K
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Journal Article
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Numerical Data
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ALUMINIUM OXIDES, ANNEALING, BISMUTH OXIDES, CALCIUM OXIDES, COATINGS, COPPER OXIDES, DIFFUSION BARRIERS, ELECTRIC CONDUCTIVITY, EXPERIMENTAL DATA, FABRICATION, GROWTH, INTERFACES, LOW TEMPERATURE, QUARTZ, SILICON, STRONTIUM OXIDES, SUPERCONDUCTING FILMS, THIN FILMS, TRANSITION TEMPERATURE, VERY HIGH TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS, ALUMINIUM COMPOUNDS, BISMUTH COMPOUNDS, CALCIUM COMPOUNDS, CHALCOGENIDES, COPPER COMPOUNDS, DATA, ELECTRICAL PROPERTIES, ELEMENTS, FILMS, HEAT TREATMENTS, INFORMATION, MINERALS, NUMERICAL DATA, OXIDE MINERALS, OXIDES, OXYGEN COMPOUNDS, PHYSICAL PROPERTIES, SEMIMETALS, STRONTIUM COMPOUNDS, THERMODYNAMIC PROPERTIES, TRANSITION ELEMENT COMPOUNDS
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