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/sup 18/F-4-fluoroantipyrine (open access)

/sup 18/F-4-fluoroantipyrine

The novel radioactive compound /sup 18/F-4-fluoroantipyrine having high specific activity which can be used in nuclear medicine in diagnostic applications, prepared by the direct fluorination of antipyrine in acetic acid with radioactive fluorine at room temperature and purifying said radioactive compound by means of gel chromatography with ethyl acetate as eluent is disclosed. The non-radioactive 4-fluoroantipyrine can also be prepared by the direct fluorination of antipyrine in acetic acid with molecular fluorine at room temperature and purified by means of gel chromatography with ethyl acetate eluent.
Date: January 1, 1980
Creator: Shiue, Chyng-Ysnn & Wolf, Alfred P.
System: The UNT Digital Library
Passive decay heat removal system for water-cooled nuclear reactors (open access)

Passive decay heat removal system for water-cooled nuclear reactors

This document describes passive decay-heat removal system for a water-cooled nuclear reactor which employs a closed heat transfer loop having heat-exchanging coils inside an open-topped, insulated evaporator located inside the reactor vessel, below its normal water level, in communication with a condenser located outside of containment and exposed to the atmosphere. The heat transfer loop is located such that the evaporator is in a position where, when the water level drops in the reactor, it will become exposed to steam. Vapor produced in the evaporator passes upward to the condenser above the normal water level. In operation, condensation in the condenser removes heat from the system, and the condensed liquid is returned to the evaporator. The system is disposed such that during normal reactor operations where the water level is at its usual position, very little heat will be removed from the system, but during emergency, low water level conditions, substantial amounts of decay heat will be removed.
Date: January 1, 1990
Creator: Forseberg, C.W.
System: The UNT Digital Library
Extrusion of metal oxide superconducting wire, tube or ribbon (open access)

Extrusion of metal oxide superconducting wire, tube or ribbon

A process and apparatus for extruding a superconducting metal oxide composition YBa{sub 2}Cu{sub 3}O{sub 7-x} provides a wire (tube or ribbon) having a cohesive mass and a degree of flexibility together with enhanced electrical properties. Wire diameters in the range of 6--85 mils have been produced with smaller wires on the order of 10 mils in diameter exhibiting enhanced flexibility for forming braided, or multistrand, configurations for greater current carrying capacity. The composition for extrusion contains a polymeric binder to provide a cohesive mass to bind the particles together during the extrusion process with the binder subsequently removed at lower temperatures during sintering. The composition for extrusion further includes a deflocculent, an organic plasticizer and a solvent which also are subsequently removed during sintering. Electrically conductive tubing with an inner diameter of 52 mil and an outer diameter of 87--335 mil has also been produced. Flat ribbons have been produced in the range of 10--125 mil thick by 100--500 mil wide. The superconducting wire, tube or ribbon may include an outer ceramic insulating sheath co-extruded with the wire, tubing or ribbon.
Date: January 1, 1990
Creator: Dusek, J.T.
System: The UNT Digital Library
Improved thermal storage module for solar dynamic receivers (open access)

Improved thermal storage module for solar dynamic receivers

This invention relates to a thermal storage apparatus and more particularly to an apparatus for use in conjunction with solar dynamic energy storage systems. The invention is comprised of a thermal energy storage system comprising a germanium phase change material and a graphite container.
Date: January 1, 1990
Creator: Beatty, R. L. & Lauf, R. J.
System: The UNT Digital Library
Plant Fatty Acid Amide Hydrolases (open access)

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
Method, System and Apparatus for Automatic Keyword Extraction (open access)

Method, System and Apparatus for Automatic Keyword Extraction

Patent relating to a method, system and apparatus for automatic keyword extraction.
Date: November 6, 2009
Creator: Csomai, Andras & Mihalcea, Rada, 1974-
System: The UNT Digital Library
Composition of Epoxy Resin, Aliphatic Amine Curing Agent and Halogenated Amine (open access)

Composition of Epoxy Resin, Aliphatic Amine Curing Agent and Halogenated Amine

Patent relating to the composition of epoxy resin, aliphatic amine curing agent and halogenated amine.
Date: March 10, 2009
Creator: Bilyeu, Bryan; Brostow, Witold, 1934- & Menard, Kevin P.
System: The UNT Digital Library
Method of Enhancing Quality Factors in Cotton (open access)

Method of Enhancing Quality Factors in Cotton

Patent relating to a method of enhancing quality factors in cotton.
Date: June 9, 2006
Creator: Hake, Kater Davis; Chapman, Kent D.; Kerby, Thomas Arthur & Speed, Thomas Rainey
System: The UNT Digital Library
Clutch Driven Reaction Wheel Steering Unit (open access)

Clutch Driven Reaction Wheel Steering Unit

Patent relating to a clutch driven reaction wheel steering unit.
Date: April 5, 2005
Creator: Smith, Monty J. & Maestas, Jeffrey E.
System: The UNT Digital Library
Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion (open access)

Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion

This invention is a process for the passivation or deactivation with respect to oxygen of a carbonaceous material by the exposure of the carbonaceous material to an oxygenated gas in which the oxygenated gas pressure is increased from a first pressure to a second pressure and then the pressure is changed to a third pressure. Preferably a cyclic process which comprises exposing the carbonaceous material to the gas at low pressure and increasing the pressure to a second higher pressure and then returning the pressure to a lower pressure is used. The cycle is repeated at least twice wherein the higher pressure may be increased after a selected number of cycles.
Date: January 29, 2002
Creator: Ochs, Thomas L.; Sands, William D.; Schroeder, Karl; Summers, Cathy A. & Utz, Bruce R.
System: The UNT Digital Library
Apparatus and Method for Increasing the Diameter of Metal Alloy Wires Within a Molten Metal Pool (open access)

Apparatus and Method for Increasing the Diameter of Metal Alloy Wires Within a Molten Metal Pool

In a dip forming process the core material to be coated is introduced directly into a source block of coating material eliminating the need for a bushing entrance component. The process containment vessel or crucible is heated so that only a portion of the coating material becomes molten, leaving a solid portion of material as the entrance port of, and seal around, the core material. The crucible can contain molten and solid metals and is especially useful when coating core material with reactive metals. The source block of coating material has been machined to include a close tolerance hole of a size and shape to closely fit the core material. The core material moves first through the solid portion of the source block of coating material where the close tolerance hole has been machined, then through a solid/molten interface, and finally through the molten phase where the diameter of the core material is increased. The crucible may or may not require water-cooling depending upon the type of material used in crucible construction. The system may operate under vacuum, partial vacuum, atmospheric pressure, or positive pressure depending upon the type of source material being used.
Date: January 29, 2002
Creator: Hartman, Alan D.; Argetsinger, Edward R.; Hansen, Jeffrey S.; Paige, Jack I.; King, Paul E. & Turner, Paul C.
System: The UNT Digital Library
Kitchen-Cabinet (open access)

Kitchen-Cabinet

Patent for improvement of kitchen cabinet including removable bins and sifters, including illustrations.
Date: January 29, 1901
Creator: Lake, Reuben R.
System: The Portal to Texas History
Wrench (open access)

Wrench

Patent for a wrench.
Date: January 6, 1903
Creator: Campbell, Thomas E.
System: The Portal to Texas History
Bale-Forming Apparatus (open access)

Bale-Forming Apparatus

Patent for an automatic bale forming apparatus that can be set to make a certain size cotton bale and will stop when it reaches that size and send the finished bale out on a conveyer belt and begin the next one.
Date: January 21, 1908
Creator: Reagan, Edgar
System: The Portal to Texas History
Nut-Lock. (open access)

Nut-Lock.

Patent for a nut lock that is easy to manufacture.
Date: January 3, 1911
Creator: Dowell, Lawson H.
System: The Portal to Texas History
Washing Machine (open access)

Washing Machine

Patent for a washing machine. The design includes a plunger that reciprocates up and down in order to agitate the contents. It is operated by a foot-plate and is meant to be easy-to-use.
Date: January 23, 1906
Creator: Moeckel, A. G.
System: The Portal to Texas History
Milk-Strainer and Support Therefor. (open access)

Milk-Strainer and Support Therefor.

Patent for a milk strainer that prevents splashing and spilling of milk. The strainer will rest on top a separate supply tank that collects milk without the need for a person to hold the strainer.
Date: January 30, 1912
Creator: Ebner, Hermann J.
System: The Portal to Texas History
Syringe (open access)

Syringe

Patent for a syringe. This invention is meant for use with animals to perform artificial insemination. Illustrations included.
Date: January 8, 1907
Creator: Brookes, Robert C.
System: The Portal to Texas History
Calf-Weaner. (open access)

Calf-Weaner.

Patent for "new and useful Improvements in Calf-Weaners." (line 5-6) including instructions and illustrations.
Date: January 9, 1906
Creator: Chandler, William E.
System: The Portal to Texas History
Baling-Press (open access)

Baling-Press

Patent for a baling press that uses the minimum amount of power to accomplish the baling process.
Date: January 17, 1911
Creator: Gill, Fleet & Graham, Daniel O.
System: The Portal to Texas History
Switch-Hook (open access)

Switch-Hook

Patent for a switch lock which prevents "splitting" (line 13). Illustrations included.
Date: January 28, 1908
Creator: Tullock, John Thomas
System: The Portal to Texas History
Middle-Breaker and Turning-Plow. (open access)

Middle-Breaker and Turning-Plow.

Patent for improvements in middle-breakers and turning-plows by providing an attachment for the middle breakers or turning plow, in which it will permit lateral adjustment of the wheel, by the use of a compound axle of adjustable length. (Lines 10-15) Illustration is included.
Date: January 4, 1910
Creator: Armstrong, Josiah B. C.
System: The Portal to Texas History
Shoe Lace (open access)

Shoe Lace

Patent for a shoe lace that does not become loose nor untie accidentally. Illustrations included.
Date: January 17, 1905
Creator: Nicholls, George H.
System: The Portal to Texas History
Machine for Forming Round Cotton-Bales. (open access)

Machine for Forming Round Cotton-Bales.

Patent to improve automation for forming round cotton bales in baling presses, including illustrations.
Date: January 9, 1906
Creator: Cagle, Carter M.
System: The Portal to Texas History