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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
Cultivator Hopple (open access)

Cultivator Hopple

Patent for a cultivator hopple. The hopple is a device for shifting beams of cultivators for the purpose of adjusting plows. Illustrations included.
Date: January 1, 1907
Creator: Cowart, Stephen A.
System: The Portal to Texas History
Cotton Thinning Plow (open access)

Cotton Thinning Plow

Patent for cotton thinning plow. Illustration included.
Date: January 1, 1907
Creator: Edgin, William Alaxander
System: The Portal to Texas History
Cotton-Compress. (open access)

Cotton-Compress.

Patent for improvement in cotton-compresses by employing two compressing rolls, so that while one compress is finishing a bale the other would continuously carry out the feeding operation; making it unnecessary to stop the condenser or any part of the ginning apparatus. Illustration is included.
Date: January 1, 1901
Creator: Rembert, Henry
System: The Portal to Texas History
Combination-Tool (open access)

Combination-Tool

Patent for improvements in combination-tools especially adapted for repairing rubber tires.
Date: January 1, 1901
Creator: Green, Samuel Milton
System: The Portal to Texas History
Bung and Air Connection for Beer-Kegs, &c. (open access)

Bung and Air Connection for Beer-Kegs, &c.

Patent for improvements in bungs and air connections for beer-kegs by using a metallic bung which has an opening (a bung-hole), “and provided atone side with a passage, the passage being interiorly threaded at its outer end, an air-tube provided with a valve and having a swiveled member exteriorly threaded and engaging the threaded portion of the passage, and the cork or stopper arranged within the inner portion of the bung-hole and closing the inner end of the passage.” (Lines 116-123, p. 3) Illustration is included.
Date: January 1, 1901
Creator: Morawetz, John
System: The Portal to Texas History
Boat Propeller (open access)

Boat Propeller

Patent for a boat propeller. Illustration included.
Date: January 1, 1907
Creator: Edgar, Samuel Nooley
System: The Portal to Texas History
Cotton Chopper (open access)

Cotton Chopper

Patent for a cotton chopper. This invention is designed to mounted on a cultivator carriage. It also provides detachable devices by which the cotton chopping mechanism. Illustration included.
Date: January 1, 1907
Creator: Cowart, Stephen A.
System: The Portal to Texas History
Cotton-Chopper. (open access)

Cotton-Chopper.

Patent for improvements a cotton chopper that "consists of a two-wheeled carriage having a hoe situated to thin the cotton and is operated by bevel gear-wheels, a ratchet-wheel, and a spring" (lines 12-15).
Date: January 1, 1901
Creator: Levings, Enoc
System: The Portal to Texas History
Attachment for Lead-Pencils. (open access)

Attachment for Lead-Pencils.

Patent for a calendar that attaches permanently to a lead pencil and wraps securely when not being viewed.
Date: January 1, 1901
Creator: Masters, George
System: The Portal to Texas History
Horse-Detacher. (open access)

Horse-Detacher.

Patent for an improved horse-detacher, including illustrations.
Date: January 1, 1901
Creator: Vincent, William O.
System: The Portal to Texas History
Combined Bag-Holder and Sifter. (open access)

Combined Bag-Holder and Sifter.

Patent for improvements in a combined bag-holder and sifter by using a supporting bracket secured to a wall, a bag-holder, a sifter located below the bag-holder, a detachable suspending connection between the sifter and the bag-engaging devices rising from the sifter. With this arrangement, the bag will be elevated into the proper position and to hold the bag against lateral movement while the sifter is being operated. The bag is to remain in proper position until the contents has been sifted entirely. Illustration is included.
Date: January 1, 1901
Creator: Shanley, Michael H.
System: The Portal to Texas History
Counterrotating brushless dc permanent magnet motor (open access)

Counterrotating brushless dc permanent magnet motor

An brushless DC permanent magnet motor is provided for driving an autonomous underwater vehicle. In one embodiment, the motor comprises four substantially flat stators disposed in stacked relationship, with pairs of the stators being axially spaced and each of the stators comprising a tape-wound stator coil; and a first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore therein in which the first shaft is disposed. Two different sets of bearings support the first and second shAfts. In another embodiment, the motor comprises two ironless stators and pairs and rotors mounted no opposite sides of the stators and driven by counterrotating shafts.
Date: January 1, 1990
Creator: Hawsey, R. A. & Bailey, J. M.
System: The UNT Digital Library
A Stripline Fast Faraday Cup for measuring GHz structure of ion beams (open access)

A Stripline Fast Faraday Cup for measuring GHz structure of ion beams

The Stripline Fast Faraday Cup is a device which is used to quantitatively and qualitatively measure gigahertz time structure characteristics of ion beams with energies up to at least 30 Mev per nucleon. A stripline geometry is employed in conjunction with an electrostatic screen and a Faraday cup to provide for analysis of the structural characteristics of an ion beam. The stripline geometry allows for a large reduction in the size of the instrument while the electrostatic screen permits measurements of the properties associated with low speed ion beams.
Date: January 1, 1990
Creator: Bogaty, J. M.
System: The UNT Digital Library
A method and apparatus for continuous electrophoresis (open access)

A method and apparatus for continuous electrophoresis

A method and apparatus for conducting continuous separation of substances by electrophoresis are disclosed. The process involves electrophoretic separation combined with couette flow in a thin volume defined by opposing surfaces. By alternating the polarity of the applied potential and producing reciprocating short rotations of at least on of the surfaces relative to the other, small increments of separation accumulate to cause substantial, useful segregation of electrophoretically separable components in a continuous flow system.
Date: January 1, 1990
Creator: Watson, J. S.
System: The UNT Digital Library
Triaxial thermopile array geo-heat-flow sensor (open access)

Triaxial thermopile array geo-heat-flow sensor

A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier's Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings. 6 figs.
Date: January 1, 1990
Creator: Carrigan, Charles R.; Hardee, Harold C.; Reynolds, Gerald D. & Steinfort, Terry D.
System: The UNT Digital Library
Acyclonucleosides of 2-nitroimidazole and uses as diagnostic and therapeutic agents (open access)

Acyclonucleosides of 2-nitroimidazole and uses as diagnostic and therapeutic agents

An acyclonucleoside of nitroimidazole having the ability to specifically bind to tumor cells and useful for therapy, chemotherapy, imaging and radiosensitizing the tumor cells.
Date: January 1, 1990
Creator: Srivastava, P.C. & Hasan, A.
System: The UNT Digital Library
Wedge assembly for electrical transformer component spacing (open access)

Wedge assembly for electrical transformer component spacing

This invention is comprised of a wedge assembly that is easily inserted between two surface to be supported thereby, and thereafter expanded to produce a selected spacing between those surfaces. This wedge assembly has two outer members that are substantially identical except that they are mirror images of each other. Oppositely directed faces of these of these outer members are substantially parallel for the purpose of contacting the surfaces to be separated. The other faces of these outer members that are directed toward each other are tapered so as to contact a center member having complementary tapers on both faces. A washer member is provided to contact a common end of the outer members, and a bolt member penetrates this washer and is threadably received in a receptor of the center member. As the bolt member is threaded into the center member, the center member is drawn further into the gap between the outer members and thereby separates these outer members to contact the surfaces to be separated. In the preferred embodiment, the contacting surfaces of the outer member and the center member are provided with guide elements. The wedge assembly is described for use in separating the secondary windings …
Date: January 1, 1990
Creator: Baggett, F.E. & Cage, W.F.
System: The UNT Digital Library
All ceramic structure for molten carbonate fuel cell (open access)

All ceramic structure for molten carbonate fuel cell

An all-ceramic molten carbonate fuel cell having a composition formed of a multivalent metal oxide or oxygenate such as an alkali metal, transition metal oxygenate. The structure includes an anode and cathode separated by an electronically conductive interconnect. The electrodes and interconnect are compositions ceramic materials. Various combinations of ceramic compositions for the anode, cathode and interconnect are disclosed. The fuel cell exhibits stability in the fuel gas and oxidizing environments. It presents reduced sealing and expansion problems in fabrication and has improved long-term corrosion resistance.
Date: January 1, 1991
Creator: Smith, James L. & Kucera, Eugenia H.
System: The UNT Digital Library
Separation processes using expulsion from dilute supercritical solutions (open access)

Separation processes using expulsion from dilute supercritical solutions

This invention relates to separation processes and particularly to isotope separation processes performed near the critical point of solvents for separation of solutes therefrom, and was developed pursuant to a contract with 5 the United States Department of Energy, contract number DE-AC05-84OR21400, and funded under WPF number ERKCT07.
Date: January 1, 1991
Creator: Cochran, H.D. Jr.
System: The UNT Digital Library
Solid-state NMR imaging system (open access)

Solid-state NMR imaging system

An accessory for use with a solid-state NMR spectrometer includes a special imaging probe with linear, high-field strength gradient fields and high-power broadband RF coils using a back projection method for data acquisition and image reconstruction, and a real-time pulse programmer adaptable for use by a conventional computer for complex high speed pulse sequences.
Date: January 1, 1990
Creator: Gopalsami, N.; Dieckman, S.L. & Ellingson, W.A.
System: The UNT Digital Library