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Single Reflective Optical Element for Interference Lithography (open access)

Single Reflective Optical Element for Interference Lithography

Patent relating to optical elements for use in interference lithography.
Date: August 1, 2014
Creator: Lin, Yuankun; Lutkenhaus, Jeffrey & George, David
System: The UNT Digital Library
Identification of and Composition Containing Polyphosphate Accumulating Bacteria (open access)

Identification of and Composition Containing Polyphosphate Accumulating Bacteria

Patent relating to the identification of and compositions containing polyphosphate accumulating bacteria.
Date: March 15, 2013
Creator: Allen, Michael S. & LaMontagne, Michael G.
System: The UNT Digital Library
Silver and Silver Nanoparticle Maldi Matrix Utilizing Online Soft Landing Ion Mobility (open access)

Silver and Silver Nanoparticle Maldi Matrix Utilizing Online Soft Landing Ion Mobility

Patent relating to silver and silver nanoparticle maldi matrix utilizing online soft landing ion mobility.
Date: November 2, 2011
Creator: Verbeck, Guido F. & Davila, Stephen
System: The UNT Digital Library
Multifunctional Micropipette Biological Sensor (open access)

Multifunctional Micropipette Biological Sensor

Patent relating to a multifunctional micropipette biological sensor.
Date: May 7, 2010
Creator: Choi, Tae-Youl
System: The UNT Digital Library
Graphene/(Multilayer) Boron Nitride Heteroepitaxy for Electronic Device Applications (open access)

Graphene/(Multilayer) Boron Nitride Heteroepitaxy for Electronic Device Applications

Patent relating to graphene/(multilayer) boron nitride heteroepitaxy for electronic device applications.
Date: September 23, 2011
Creator: Kelber, Jeffry A.
System: The UNT Digital Library
Method and Apparatus for Hydrogen Production from Greenhouse Gas Saturated Carbon Nanotubes and Synthesis of Carbon Nanostructures Therefrom (open access)

Method and Apparatus for Hydrogen Production from Greenhouse Gas Saturated Carbon Nanotubes and Synthesis of Carbon Nanostructures Therefrom

Patent relating a method and apparatus for hydrogen production from greenhouse gas saturated carbon nanotubes and synthesis of carbon nanostructures therefrom.
Date: July 26, 2005
Creator: Henley, Donald E. & Imholt, Timothy
System: The UNT Digital Library
In-Situ Containment and Extraction of Volatile Soil Contaminants (open access)

In-Situ Containment and Extraction of Volatile Soil Contaminants

The invention relates to a novel approach to containing and removing toxic waste from a subsurface environment. More specifically the present invention relates to a system for containing and removing volatile toxic chemicals from a subsurface environment using differences in surface and subsurface pressures. The present embodiment generally comprises a deep well, a horizontal tube, at least one injection well, at least one extraction well and a means for containing the waste within the waste zone (in-situ barrier). During operation the deep well air at the bottom of well (which is at a high pressure relative to the land surface as well as relative to the air in the contaminated soil) flows upward through the deep well (or deep well tube). This stream of deep well air is directed into the horizontal tube, down through the injection tube(s) (injection well(s)) and into the contaminate plume where it enhances volatization and/or removal of the contaminants.
Date: December 27, 2005
Creator: Varvel, Mark Darrell
System: The UNT Digital Library
Near-Field Magneto-Optical Microscope (open access)

Near-Field Magneto-Optical Microscope

A device and method for mapping magnetic fields of a sample at a resolution less than the wavelength of light without altering the magnetic field of the sample is disclosed. A device having a tapered end portion with a magneto-optically active particle positioned at the distal end thereof in communication with a fiber optic for transferring incoming linearly polarized light from a source thereof to the particle and for transferring reflected light from the particle is provided. The fiber optic has a reflective material trapping light within the fiber optic and in communication with a light detector for determining the polarization of light reflected from the particle as a function of the strength and direction of the magnetic field of the sample. Linearly polarized light from the source thereof transferred to the particle positioned proximate the sample is affected by the magnetic field of the sample sensed by the particle such that the difference in polarization of light entering and leaving the particle is due to the magnetic field of the sample. Relative movement between the particle and sample enables mapping.
Date: December 6, 2005
Creator: Vlasko-Vlasov, Vitalii; Welp, Ulrich & and Crabtree, George W.
System: The UNT Digital Library
Low-Temperature Synthesis of Actinide Tetraborides by Solid-State Metathesis Reactions (open access)

Low-Temperature Synthesis of Actinide Tetraborides by Solid-State Metathesis Reactions

The synthesis of actinide tetraborides including uranium tetraboride (UB,), plutonium tetraboride (PUB,) and thorium tetraboride (ThB{sub 4}) by a solid-state metathesis reaction are demonstrated. The present method significantly lowers the temperature required to {approx_equal}850 C. As an example, when UCl{sub 4}, is reacted with an excess of MgB{sub 2}, at 850 C, crystalline UB, is formed. Powder X-ray diffraction and ICP-AES data support the reduction of UCl{sub 3}, as the initial step in the reaction. The UB, product is purified by washing water and drying.
Date: December 14, 2004
Creator: Lupinetti, Anthony J.; Garcia, Eduardo & Abney, Kent D.
System: The UNT Digital Library
Method and Apparatus for Atomizing Fluids with a Multi-Fluid Nozzle (open access)

Method and Apparatus for Atomizing Fluids with a Multi-Fluid Nozzle

The invention relates to a method and apparatus for atomizing liquids. In particular, the present invention relates to a method and apparatus for atomizing heavy hydrocarbon fuels such as diesel, as part of a fuel reforming process. During normal operating conditions the fuel is atomized by a high pressure fluid. Under start-up conditions when only a low pressure gas is available the fuel films across part of the nozzle and is subsequently atomized by a radially directed low pressure dispersion gas.
Date: December 7, 2004
Creator: Novick, Vincent J. & Ahluwalia, Rajesh K.
System: The UNT Digital Library
Method for processing aluminum spent potliner in a graphite electrode arc furnace (open access)

Method for processing aluminum spent potliner in a graphite electrode arc furnace

A method of processing spent aluminum pot liner containing carbon, cyanide compositions, fluorides and inorganic oxides. The spend aluminum pot liner is crushed, iron oxide is added to form an agglomerated material. The agglomerated material is melted in an electric arc furnace having the electrodes submerged in the molten material to provide a reducing environment during the furnace operation. In the reducing environment, pot liner is oxidized while the iron oxides are reduced to produce iron and a slag substantially free of cyanide compositions and fluorides. An off-gas including carbon oxides and fluorine is treated in an air pollution control system with an afterburner and a scrubber to produce NaF, water and a gas vented to the atmosphere free of cyanide compositions, fluorine, and CO.
Date: December 24, 2002
Creator: O'Connor, William K.; Turner, Paul C. & Addison, G.W. (AJT Enterprises, Inc.)
System: The UNT Digital Library
High Specific Surface area Aerogel Cryoadsorber for Vacuum Pumping Applications (open access)

High Specific Surface area Aerogel Cryoadsorber for Vacuum Pumping Applications

A cryogenic pumping system is provided, comprising a vacuum environment, an aerogel sorbent formed from a carbon aerogel disposed within the vacuum environment, and cooling means for cooling the aerogel sorbent sufficiently to adsorb molecules from the vacuum environment onto the aerogel sorbent. Embodiments of the invention include a liquid refrigerant cryosorption pump, a compressed helium cryogenic pump, a cryopanel and a Meissner coil, each of which uses carbon aerogel as a sorbent material.
Date: December 22, 1998
Creator: Hill, Randal M.; Fought, Eric R. & Biltoft, Peter J.
System: The UNT Digital Library
Electrochemical Membrane Incinerator (open access)

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 (open access)

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
Drum bubbler tritium processing system (open access)

Drum bubbler tritium processing system

A method is described for separating tritium oxide from a gas stream containing tritium oxide. The gas stream containing tritium oxide is fed into a container of water having a head space above the water. Bubbling the gas stream containing tritium oxide through the container of water and removing gas from the container head space above the water. Thereafter, the gas from the head space is dried to remove water vapor from the gas, and the water vapor is recycled to the container of water.
Date: December 1, 1998
Creator: Rule, Keith; Gettelfinger, Geoff & Kivler, Paul
System: The UNT Digital Library
Fatty acyl-CoA reductase (open access)

Fatty acyl-CoA reductase

The present invention relates to bacterial enzymes, in particular to an acyl-CoA reductase and a gene encoding an acyl-CoA reductase, the amino acid and nucleic acid sequences corresponding to the reductase polypeptide and gene, respectively, and to methods of obtaining such enzymes, amino acid sequences and nucleic acid sequences. The invention also relates to the use of such sequences to provide transgenic host cells capable of producing fatty alcohols and fatty aldehydes.
Date: December 1, 1998
Creator: Reiser, Steven E. & Somerville, Chris R.
System: The UNT Digital Library
Method for direct production of carbon disulfide and hydrogen from hydrocarbons and hydrogen sulfide feedstock (open access)

Method for direct production of carbon disulfide and hydrogen from hydrocarbons and hydrogen sulfide feedstock

A method for converting hydrocarbons and hydrogen sulfide to carbon disulfide and hydrogen is provided comprising contacting the hydrocarbons and hydrogen sulfide to a bi-functional catalyst residing in a controlled atmosphere for a time and at a temperature sufficient to produce carbon disulfide and hydrogen. Also provided is a catalyst for converting carbon sulfides and hydrogen sulfides to gasoline range hydrocarbons comprising a mixture containing a zeolite catalyst and a hydrogenating catalyst.
Date: December 1998
Creator: Miao, F. Q. & Erekson, E. J.
System: The UNT Digital Library
Nanodisperse transition metal electrodes (NTME) for electrochemical cells (open access)

Nanodisperse transition metal electrodes (NTME) for electrochemical cells

Disclosed are transition metal electrodes for electrochemical cells using gel-state and solid-state polymers. The electrodes are suitable for use in primary and secondary cells. The electrodes (either negative electrode or positive electrode) are characterized by uniform dispersion of the transition metal at the nanoscale in the polymer. The transition metal moiety is structurally amorphous, so no capacity fade should occur due to lattice expansion/contraction mechanisms. The small grain size, amorphous structure and homogeneous distribution provide improved charge/discharge cycling performance, and a higher initial discharge rate capability. The cells can be cycled at high current densities, limited only by the electrolyte conductivity. A method of making the electrodes (positive and negative), and their usage in electrochemical cells are disclosed.
Date: December 1, 1998
Creator: Striebel, Kathryn A. & Wen, Shi-Jie
System: The UNT Digital Library
Oxide strengthened molybdenum-rhenium alloy (open access)

Oxide strengthened molybdenum-rhenium alloy

Provided is a method of making an ODS molybdenum-rhenium alloy which includes the steps of: (1) forming a slurry containing molybdenum oxide and a metal salt dispersed in an aqueous medium, the metal salt being selected from nitrates or acetates of lanthanum, cerium or thorium; (2) heating the slurry in the presence of hydrogen to form a molybdenum powder comprising molybdenum and an oxide of the metal salt; (3) mixing rhenium powder with the molybdenum powder to form a molybdenum-rhenium powder; (4) pressing the molybdenum-rhenium powder to form a molybdenum-rhenium compact; (5) sintering the molybdenum-rhenium compact in hydrogen or under a vacuum to form a molybdenum-rhenium ingot; and (6) compacting the molybdenum-rhenium ingot to reduce the cross-sectional area of the molybdenum-rhenium ingot and form a molybdenum-rhenium alloy containing said metal oxide. The present invention also provides an ODS molybdenum-rhenium alloy made by the method.
Date: December 1, 1998
Creator: Bianco, Robert & Buckman, William R. Jr.
System: The UNT Digital Library
Periodic equivalence ratio modulation method and apparatus for controlling combustion instability (open access)

Periodic equivalence ratio modulation method and apparatus for controlling combustion instability

The periodic equivalence ratio modulation (PERM) method and apparatus significantly reduces and/or eliminates unstable conditions within a combustion chamber. The method involves modulating the equivalence ratio for the combustion device, such that the combustion device periodically operates outside of an identified unstable oscillation region. The equivalence ratio is modulated between preselected reference points, according to the shape of the oscillation region and operating parameters of the system. Preferably, the equivalence ratio is modulated from a first stable condition to a second stable condition, and, alternatively, the equivalence ratio is modulated from a stable condition to an unstable condition. The method is further applicable to multi-nozzle combustor designs, whereby individual nozzles are alternately modulated from stable to unstable conditions. Periodic equivalence ratio modulation (PERM) is accomplished by active control involving periodic, low frequency fuel modulation, whereby low frequency fuel pulses are injected into the main fuel delivery. Importantly, the fuel pulses are injected at a rate so as not to affect the desired time-average equivalence ratio for the combustion device.
Date: December 1, 1998
Creator: Richards, George A.; Janus, Michael C. & Griffith, Richard A.
System: The UNT Digital Library
Process for strengthening aluminum based ceramics and material (open access)

Process for strengthening aluminum based ceramics and material

A process for strengthening aluminum based ceramics is provided. A gaseous atmosphere consisting essentially of silicon monoxide gas is formed by exposing a source of silicon to an atmosphere consisting essentially of hydrogen and a sufficient amount of water vapor. The aluminum based ceramic is exposed to the gaseous silicon monoxide atmosphere for a period of time and at a temperature sufficient to produce a continuous, stable silicon-containing film on the surface of the aluminum based ceramic that increases the strength of the ceramic.
Date: December 1, 1998
Creator: Moorhead, Arthur J. & Kim, Hyoun-Ee
System: The UNT Digital Library
A rigid porous filter and filtration method (open access)

A rigid porous filter and filtration method

The present invention involves a porous rigid filter comprising a plurality of concentric filtration elements having internal flow passages and forming external flow passages there between. The present invention also involves a pressure vessel containing the filter for the removal of particulate from high pressure particulate containing gases, and further involves a method for using the filter to remove such particulate. The present filter has the advantage of requiring fewer filter elements due to the high surface area- to-volume ratio provided by the filter, requires a reduced pressure vessel size, and exhibits enhanced mechanical design properties, improved cleaning properties, configuration options, modularity and ease of fabrication.
Date: December 1998
Creator: Chiang, Ta-Kuan; Straub, Douglas, Straub L. & Dennis, Richard A.
System: The UNT Digital Library
Self-seeded injection-locked FEL amplifier (open access)

Self-seeded injection-locked FEL amplifier

A self-seeded free electron laser (FEL) provides a high gain and extraction efficiency for the emitted light. An accelerator outputs a beam of electron pulses to a permanent magnet wiggler having an input end for receiving the electron pulses and an output end for outputting light and the electron pulses. An optical feedback loop collects low power light in a small signal gain regime at the output end of said wiggler and returns the low power light to the input end of the wiggler while outputting high power light in a high signal gain regime.
Date: December 1, 1998
Creator: Sheffield, Richard L.
System: The UNT Digital Library
Solar reduction of CO{sub 2} (open access)

Solar reduction of CO{sub 2}

The red shift of the absorption spectrum of CO{sub 2} with increasing temperature, along with CO stabilization are the foundation of a process for direct solar reduction of CO{sub 2} to liquid fuels. The result is a process capable of using renewable solar energy to directly reduce CO{sub 2} from the atmosphere or stationary sources for recycle as a liquid fuel resulting in a net decrease in CO{sub 2} in the atmosphere and decreased demand on fossil fuel. The process includes in sequence: preparation of adequately pure CO{sub 2} feed; preheating CO{sub 2} to near 1,800 K; breaking the CO{sub 2} bonds to produce CO, O{sub 2} and O; quenching the hot product mix by rapid admixture with room temperature CO{sub 2}; removing excess thermal energy to produce electricity, heat new CO{sub 2} and enable subsequent process steps; removing the remaining CO{sub 2} from the gas; removing oxygen from the gas; converting part of the product CO to H{sub 2} by the shift reaction; and, finally, catalytically synthesizing methanol from the synthetic gas.
Date: December 1, 1998
Creator: Jensen, Reed J.; Lyman, John L.; King, Joe D. & Guettler, Robert D.
System: The UNT Digital Library