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Gold, Silver, and Copper Nanoparticles Stabilized in Biocompatible Aqueous Media
Patent relating to gold, silver, and copper nanoparticles stabilized in biocompatible aqueous media.
Date:
December 30, 2009
Creator:
Omary, Mohammad A.; Hu, Zhibing; Marpu, Sreekar & Elbjeirami, Oussama
System:
The UNT Digital Library
Plant Fatty Acid Amide Hydrolases
Patent relating to plant fatty acid amide hydrolases (FAAH) coding sequences.
Date:
January 8, 2008
Creator:
Chapman, Kent D.; Shrestha, Rhidaya; Blancaflor, Elison B. & Dixon, R. A.
System:
The UNT Digital Library
Systems and Methods for Integrated Emissivity and Temperature Measurement of a Surface
A multi-channel spectrometer and a light source are used to measure both the emitted and the reflected light from a surface which is at an elevated temperature relative to its environment. In a first method, the temperature of the surface and emissivity in each wavelength is calculated from a knowledge of the spectrum and the measurement of the incident and reflected light. In the second method, the reflected light is measured from a reference surface having a known reflectivity and the same geometry as the surface of interest and the emitted and the reflected light are measured for the surface of interest. These measurements permit the computation of the emissivity in each channel of the spectrometer and the temperature of the surface of interest.
Date:
November 8, 2005
Creator:
Poulsen, Peter
System:
The UNT Digital Library
Electrochemical Membrane Incinerator
Electrochemical incineration of benzoquinone was evaluated as a model for the mineralization of carbon in toxic aromatic compounds. A Ti or Pt anode was coated with a film of the oxides of Ti, Ru, Sn and Sb. This quaternary metal oxide film was stable; elemental analysis of the electrolyzed solution indicated the concentration of these metal ions to be 3 {micro}g/L or less. The anode showed good reactivity for the electrochemical incineration of benzoquinone. The use of a dissolved salt matrix as the so-called ''supporting electrolyte'' was eliminated in favor of a solid-state electrolyte sandwiched between the anode and cathode.
Date:
December 8, 1998
Creator:
Johnson, Dennis C.; Houk, Linda L. & Feng, Jianren
System:
The UNT Digital Library
Method for Plutonium-Gallium Separation by Anodic Dissolution of a Solid Plutonium-Gallium Alloy
Purified plutonium and gallium are efficiently recovered from a solid plutonium-gallium (Pu-Ga) alloy by using an electrorefining process. The solid Pu-Ga alloy is the cell anode, preferably placed in a moving basket within the electrolyte. As the surface of the Pu-Ga anode is depleted in plutonium by the electrotransport of the plutonium to a cathode, the temperature of the electrolyte is sufficient to liquify the surface, preferably at about 500 C, resulting in a liquid anode layer substantially comprised of gallium. The gallium drips from the liquified surface and is collected below the anode within the electrochemical cell. The transported plutonium is collected on the cathode surface and is recovered.
Date:
December 8, 1998
Creator:
Miller, William E. & Tomczuk, Zygmunt
System:
The UNT Digital Library
Cyanoethylated Compounds as Additives in Lithium/Lithium Ion Batteries
The power loss of lithium/lithium ion battery cells is significantly reduced, especially at low temperatures, when about 1% by weight of an additive is incorporated in the electrolyte layer of the cells. The usable additives are organic solvent soluble cyanoethylated polysaccharides and poly(vinyl alcohol). The power loss decrease results primarily from the decrease in the charge transfer resistance at the interface between the electrolyte and the cathode.
Date:
May 8, 1998
Creator:
Nagasubramanian, Ganesan
System:
The UNT Digital Library
Titanium Carbide Bipolar Plate for Electrochemical Devices
Titanium carbide comprises a corrosion resistant, electrically conductive, non-porous bipolar plate for use in an electrochemical device. The process involves blending titanium carbide powder with a suitable binder material, and molding the mixture, at an elevated temperature and pressure.
Date:
May 8, 1998
Creator:
LaConti, Anthony B.; Griffith, Arthur E.; Cropley, Cecelia C. & Kosek, John A.
System:
The UNT Digital Library
Binder Enhanced Refuse Derived Fuel
Patent relating to refuse derived fuels and more particularly to binder enhanced refuse derived fuel pellets and utilization of such pellets in solid-fuel fired furnaces.
Date:
April 12, 1995
Creator:
Daugherty, Kenneth E.; Venables, Barney J. & Ohlsson, Oscar O.
System:
The UNT Digital Library
Corrosion-resistant iridium-platinum anode material for high polarization application in corrosive acids
The present invention relates to highly corrosion resistant components for use in an electrochemical cell. Specifically, these components are resistant to corrosion under very extreme conditions such as exposure to aqua regia in the presence of a constant current density of 100mA/m{sup 2}. The components are comprised of an iridium-platinum alloy that comprises less than 30% iridium. In a preferred embodiment of the present invention, the iridium-platinum alloy comprises 15-20% iridium. In another preferred embodiment of the present invention, the iridium-platinum alloy is deposited on the surface of an electrochemical cell component by magnetron sputtering. The present invention also relates to a method for conducting an electrochemical reaction in the presence of highly corrosive acids under a high degree of polarization wherein the electrochemical cell comprises a component, preferably the anode, containing an iridium-platinum alloy that comprises less than 30% iridium.
Date:
September 8, 1993
Creator:
Farmer, J.; Summers, L. & Lewis, P.
System:
The UNT Digital Library
Nondestructive method and apparatus for imaging grains in curved surfaces of polycrystalline articles
A nondestructive method, and associated apparatus, are provided for determining the grain flow of the grains in a convex curved, textured polycrystalline surface. The convex, curved surface of a polycrystalline article is aligned in a horizontal x-ray diffractometer and a monochromatic, converging x-ray beam is directed onto the curved surface of the polycrystalline article so that the converging x-ray beam is diffracted by crystallographic planes of the grains in the polycrystalline article. The diffracted x-ray beam is caused to pass through a set of horizontal, parallel slits to limit the height of the beam and thereafter. The linear intensity of the diffracted x-ray is measured, suing a linear position sensitive proportional counter, as a function of position in a direction orthogonal to the counter so as to generate two dimensional data. An image of the grains in the curved surface of the polycrystalline article is provided based on the two-dimensional data.
Date:
September 8, 1993
Creator:
Carpenter, D.A.
System:
The UNT Digital Library
Atomic line emission analyzer for hydrogen isotopes
Apparatus for isotopic analysis of hydrogen comprises a low pressure chamber into which a sample of hydrogen is introduced and then exposed to an electrical discharge to excite the electrons of the hydrogen atoms to higher energy states and thereby cause the emission of light on the return to lower energy states, a Fresnel prism made at least in part of a material anomalously dispersive to the wavelengths of interest for dispersing the emitted light, and a photodiode array for receiving the dispersed light. The light emitted by the sample is filtered to pass only the desired wavelengths, such as one of the lines of the Balmer series for hydrogen, the wavelengths of which differ slightly from one isotope to another. The output of the photodiode array is processed to determine the relative amounts of each isotope present in the sample. Additionally, the sample itself may be recovered using, a metal hydride.
Date:
May 8, 1991
Creator:
Kronberg, James W.
System:
The UNT Digital Library
Elimination of ``memory`` from sample handling and inlet system of a mass spectrometer
This paper describes a method for preparing the sample handling and inlet system of a mass spectrometer for analysis of a subsequent sample following analysis of a previous sample comprising the flushing of the system interior with supercritical CO{sub 2} and venting the interior. The method eliminates the effect of system ``memory`` on the subsequent analysis, especially following persistent samples such as xenon and krypton.
Date:
May 8, 1991
Creator:
Chastgner, P.
System:
The UNT Digital Library
False color viewing device
This invention consists of a viewing device for observing objects in near-infrared false-color comprising a pair of goggles with one or more filters in the apertures, and pads that engage the face for blocking stray light from the sides so that all light reaching, the user`s eyes come through the filters. The filters attenuate most visible light and pass near-infrared (having wavelengths longer than approximately 700 nm) and a small amount of blue-green and blue-violet (having wavelengths in the 500 to 520 nm and shorter than 435 nm, respectively). The goggles are useful for looking at vegetation to identify different species and for determining the health of the vegetation, and to detect some forms of camouflage.
Date:
May 8, 1991
Creator:
Kronberg, J. W.
System:
The UNT Digital Library
Cooler and particulate separator for an off-gas stack
This report describes an off-gas stack for a melter, furnace or reaction vessel comprising an air conduit leading to two sets of holes, one set injecting air into the off-gas stack near the melter plenum and the second set injecting air downstream of the first set. The first set injects air at a compound angle, having both downward and tangential components, to create a reverse vortex flow, counter to the direction of flow of gas through the stack and also along the periphery of the stack interior surface. Air from the first set of holes prevents recirculation zones from forming and the attendant accumulation of particulate deposits on the wall of the stack and will also return to the plenum any particulate swept up in the gas entering the stack. The second set of holes injects air in the same direction as the gas in the stack to compensate for the pressure drop and to prevent the concentration of condensate in the stack. A set of sprayers, receiving water from a second conduit, is located downstream of the second set of holes and sprays water into the gas to further cool it.
Date:
April 8, 1991
Creator:
Wright, G. T.
System:
The UNT Digital Library
Laser cutting with chemical reaction assist
This invention is comprised of a method for cutting with a laser beam where an oxygen-hydrocarbon reaction is used to provide auxiliary energy to a metal workpiece to supplement the energy supplied by the laser. Oxygen is supplied to the laser focus point on the workpiece by a nozzle through which the laser beam also passes. A liquid hydrocarbon is supplied by coating the workpiece along the cutting path with the hydrocarbon prior to laser irradiation or by spraying a stream of hydrocarbon through a nozzle aimed at a point on the cutting path which is just ahead of the focus point during irradiation.
Date:
April 8, 1991
Creator:
Gettemy, D. J.
System:
The UNT Digital Library
Manufacture of silicon carbide using solar energy
This invention is comprised of a method is described for producing silicon carbide particles using solar energy. The method is efficient and avoids the need for use of electrical energy to heat the reactants. Finely divided silica and carbon are admixed and placed in a solar-heated reaction chamber for a time sufficient to cause a reaction between the ingredients to form silicon carbide of very small particle size. No grinding of silicon carbide is required to obtain small particles. The method may be carried out as a batch process or as a continuous process.
Date:
April 8, 1991
Creator:
Glatzmaier, G. C.
System:
The UNT Digital Library
Reversibly immobilized biological materials in monolayer films on electrodes
A method is provided for reversibly binding charged biological particles in a fluid medium to an electrode surface. The method comprises treating (e.g., derivatizing) the electrode surface with an electrochemically active material; connecting the electrode to an electrical potential; and exposing the fluid medium to the electrode surface in a manner such that the charged particles become adsorbed on the electrode surface.
Date:
April 8, 1991
Creator:
Weaver, P. F. & Frank, A. J.
System:
The UNT Digital Library
Fast transient digitizer
Method and apparatus are presented for sequentially scanning a plurality of target elements with an electron scanning beam modulated in accordance with variations in a high-frequency analog signal to provide discrete analog signal samples representative of successive portions of the analog signal; coupling the discrete analog signal samples from each of the target elements to a different one of a plurality of high speed storage devices; converting the discrete analog signal samples to equivalent digital signals; and storing the digital signals in a digital memory unit for subsequent measurement or display.
Date:
July 8, 1981
Creator:
Villa, F.
System:
The UNT Digital Library
Combination free-electron and gaseous laser
A multiple laser having one or more gaseous laser stages and one or more free electron stages is described. Each of the free electron laser stages is sequentially pumped by a microwave linear accelerator. Subsequently, the electron beam is directed through a gaseous laser, in the preferred embodiment, and in an alternative embodiment, through a microwave accelerator to lower the energy level of the electron beam to pump one or more gaseous lasers. The combination laser provides high pulse repetition frequencies, on the order of 1 kHz or greater, high power capability, high efficiency, and tunability in the synchronous production of multiple beams of coherent optical radiation.
Date:
June 8, 1981
Creator:
Brau, C. A.; Rockwood, S. D. & Stein, W. E.
System:
The UNT Digital Library
Detachable Washer
Patent for a detachable Washer which can be applied or removed from a bolt, without having to remove the bolt itself.
Date:
August 8, 1922
Creator:
Dubbs, Sylvester S.
System:
The Portal to Texas History
Pump Plunger.
Patent for pump plungers usable in deep wells for either oil or water. It is designed to be used for long periods without wear and tear.
Date:
August 8, 1922
Creator:
Livergood, Gerald R.
System:
The Portal to Texas History
Attachment for Gun-Slings
Patent for an attachment for gun slings that can be used on army rifles or other guns and provides the means for the sling to be held tight against the arm for steady aim.
Date:
November 8, 1921
Creator:
{Grierson, Benjamin Henry}
System:
The Portal to Texas History
Blow-Out Boot.
Patent for a blow-out boot (as it pertains to tire repair). The defining feature of this invention is that the edges are flexible and overlapping, containing slots and loops that correspond to each other to facilitate the joining of the edges.
Date:
November 8, 1921
Creator:
Williams, George G.
System:
The Portal to Texas History
Building Construction.
Patent for a building construction method. After completion of typical foundation and framework construction, "interlocking slabs or tiles are secured to the framework to form an outer covering or sheathing for the building." The interlocking method requires no cementing of material yet still allows water to be shed. "Provision is also made for fastening slabs or tiles to the framework in a manner permitting rapid assembly of parts" which reduces building time. The invention can be applied to doors and windows as demonstrated in the illustrations.
Date:
November 8, 1921
Creator:
Walker, Isham P.
System:
The Portal to Texas History