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1,2-HOIQO--A highly versatile 1,2-HOPO analog
A cyclic, bidentate hydroxamic acid binding unit based on an isoquinoline scaffold has been utilized for the synthesis of a hexadentate tripodal ligand based on the TREN backbone. This prototype for a new class of multidentate chelators forms mononuclear iron(III) complexes and one-dimensional coordination polymers with lanthanide(III) cations. The latter has been determined by single crystal X-ray analysis of the cerium species. The solid state structure in the monoclinic space group P2{sub 1}/c (C{sub 36}H{sub 34}CeN{sub 7}O{sub 11}, a = 12.341(2){angstrom}, b = 26.649(4){angstrom}, c = 10.621(2){angstrom}, {alpha} = {gamma} = 90{sup o}, {beta} = 96.753(3){sup o}, V = 3468.6(9) {angstrom}{sup 3}, Z = 4) exhibits a trigonal-dodecahedral environment around the cerium cation. The proof of concept for the versatility of the new scaffold has been shown by the modification of the crucial precursor 3-carboxyiso-coumarin through electrophilic aromatic substitutions to yield the corresponding chlorosulfonated and nitrated analogs.
Date:
August 7, 2006
Creator:
Seitz, Michael; Pluth, Michael D. & Raymond, Kenneth N.
Object Type:
Article
System:
The UNT Digital Library
15 KJ FLASH LAMP, POWER CONDITIONING UNIT DESIGNED FOR SAFTY, RELIABILITY & MANUFACTURABILITY*
A 15kJoule, Flash Lamp Power Conditioning Unit has been successfully designed, developed, and deployed in the National Ignition Facility (NIF) Preamplifier Modules (PAM). The primary design philosophy of this power conditioning unit (PCU) is safety, reliability, and manufacturability. Cost reduction over commercially equivalent systems was also achieved through an easily manufactured packaging design optimized to meet NIF requirements. While still maintaining low cost, the PCU design includes a robust control system, fault diagnostic system, and safety features. The pulsed power design includes 6 PFN modules, each including a dual series injection trigger transformer, that drive a total of 12 flash lamp loads. The lamps are individually triggered via a 20kV pulse produced by a 1kV, MCT switched capacitive discharge unit on the primary side of the trigger transformer. The remote control interface includes an embedded controller that captures flash lamp current wave forms and fault status for each shot. The embedded controller provides the flexibility of remotely adjusting both the main drive voltage from 1.6 to 2.5 kV and the trigger voltage from 0 to 20 kV.
Date:
August 7, 2007
Creator:
James, G.; Merritt, B.; Dreifuerst, G.; Strickland, S. & Tse, E.
Object Type:
Article
System:
The UNT Digital Library
21st century energy sustainability -- nuclear's role.
None
Date:
August 7, 2000
Creator:
Wade, D. C.
Object Type:
Article
System:
The UNT Digital Library
The ACT external HEPA push-through filter assembly
None
Date:
August 7, 2000
Creator:
Frigo, A. A.; Wiedmeyer, S. G.; Preuss, D. E.; Bielick, E. F. & Malecha, R. F.
Object Type:
Article
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 128, No. 10, Ed. 1 Thursday, August 7, 2003
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
August 7, 2003
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 133, No. 11, Ed. 1 Thursday, August 7, 2008
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
August 7, 2008
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 101, No. 127, Ed. 1 Monday, August 7, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 102, No. 135, Ed. 1 Tuesday, August 7, 2001
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2001
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 123, Ed. 1 Wednesday, August 7, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 105, No. 123, Ed. 1 Thursday, August 7, 2003
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2003
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 108, Ed. 1 Sunday, August 7, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 108, No. 110, Ed. 1 Monday, August 7, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 109, No. 58, Ed. 1 Tuesday, August 7, 2007
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2007
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 110, No. 6, Ed. 1 Thursday, August 7, 2008
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2008
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 111, No. 282, Ed. 1 Friday, August 7, 2009
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 7, 2009
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, August 7, 2002
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
August 7, 2002
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
The Alvin Sun (Alvin, Tex.), Vol. 109, No. 64, Ed. 1 Monday, August 7, 2000
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
August 7, 2000
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
Amec Geomatrix/Ara Groundwater Remediaiton Trip Report
City of Rialto, Well No.3 Demonstration System Integration Project, and Baldwin Park Operable Unit, Baldwin Park, California. The groundwater remediation contractors are AMEC Geomatrix and ARA. The sites were visited on July 22, 2008. Fluor Hanford and the U.S. Department of Energy are currently looking at a variety of alternatives to capture carbon tetrachloride, nitrates, and other COCs from 200-ZP-l groundwater. A few of the more important objectives of our visits were to: (1) Evaluate the treatment systems being used by AMEC Geomatrix to address VOCs, perchlorate, NDMA, 1,4,-Dioxane, and 1,2,3 TCP in a drinking water source; (2) Evaluate how effective these treatment methods have been; (3) Determine the types of problems they have encountered with these treatment systems and how they addressed these problems; (4) Determine the types of secondary wastes being generated by the system; (5) Determine how clean of an operation these companies run; and (6) Determine if the site is worth being visited by DOE-RL at a later date.
Date:
August 7, 2008
Creator:
Simmons, S. A.; Hodgson, K. M. & Byrnes, M. E.
Object Type:
Report
System:
The UNT Digital Library
America Competes Act: NIST Applied Some Safeguards in Obtaining Expert Services, but Additional Direction from Congress Is Needed
A letter report issued by the Government Accountability Office with an abstract that begins "The America COMPETES Act gave the National Institute of Standards and Technology (NIST), within the Department of Commerce, the authority, through 2010, to obtain the temporary services of up to 200 experts or consultants per year, but did not specify how the agency should acquire these services. NIST has used this authority to award personal services contracts to obtain the services of individuals. The act requires GAO to report on whether additional safeguards would be needed if NIST's authority were to be made permanent. To meet that requirement, GAO determined (1) the extent to which NIST has used its authority; (2) how effective the authority has been in helping NIST meet its need for experts; and (3) the extent to which NIST has provided appropriate safeguards over its use, and what additional safeguards are needed. GAO reviewed statutes, regulations, federal guidance, and NIST's contracts. In addition, GAO interviewed officials at NIST, Commerce, and the Office of Personnel Management (OPM)."
Date:
August 7, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
ANALYTICAL METHOD FOR MEASURING TOTAL PROTIUM AND TOTAL DEUTERIUM IN A GAS MIXTURE CONTAINING H2, D2,AND HD VIA GAS CHAROMATOGRAPHY
The most common analytical method of identifying and quantifying non-radioactive isotopic species of hydrogen is mass spectrometry. A low mass, high resolution mass spectrometer with adequate sensitivity and stability to identify and quantify hydrogen isotopes in the low ppm range is an expensive, complex instrument. A new analytical technique has been developed that measures both total protium (H) and total deuterium (D) in a gas mixture containing H{sub 2}, D{sub 2}, and HD using an inexpensive micro gas chromatograph (GC) with two molecular sieve columns. One column uses D{sub 2} as the carrier gas and the other uses H{sub 2} as the carrier gas. Laboratory tests have shown that when used in this configuration the GC can measure both total protium and total deuterium each with a detection and quantification limit of less than 20 ppm.
Date:
August 7, 2007
Creator:
Sessions, H
Object Type:
Article
System:
The UNT Digital Library
APD detector electronics for the NSTX Thomson scattering system
An electronics system has been installed and tested for the readout of APD detectors for the NSTX Thomson scattering system. Similar to previous designs, it features preamps with a fast and a slow output. The fast output uses pulse shaping to optimize sensitivity for the 8 nsec scattered light pulse while rejecting noise in the intrinsic plasma background. A low readout noise of {approximately}25 photoelectrons is achieved at an APD gain of 75. The design incorporates a number of features to provide flexibility for various modes of calibration.
Date:
August 7, 2000
Creator:
Johnson, D. W.; LeBlanc, B. P.; Long, D. L. & Renda, G.
Object Type:
Report
System:
The UNT Digital Library
Application of Reservoir Characterization and Advanced Technology to Improve Recovery and Economics in a Lower Quality Shallow Shelf Carbonate Reservoir, Class II
The Oxy operated Class 2 Project at West Welch Project is designed to demonstrate how the use of advanced technology can improve the economics of miscible CO2 injection projects in lower quality Shallow Shelf Carbonate reservoirs. The research and design phase (Budget Period 1) primarily involved advanced reservoir demonstration characterization. The current demonstration phase (Budget Period 2) is the implementation of the reservoir management plan for an optimum miscible CO2 flood design based on the reservoir characterization.
Date:
August 7, 2001
Creator:
Hickman, T. Scott; Justice, James J. & Egg, Rebecca
Object Type:
Report
System:
The UNT Digital Library
Archer County Advocate (Holliday, Tex.), Vol. 6, No. 18, Ed. 1 Thursday, August 7, 2008
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
August 7, 2008
Creator:
Stevens, Charlotte
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 32, Ed. 1 Thursday, August 7, 2003
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
August 7, 2003
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History