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1,2- Hydroxypyridonates as Contrast Agents for Magnetic ResonanceImaging: TREN-1,2-HOPO
1,2-Hydroxypyridinones (1,2-HOPO) form very stable lanthanide complexes that may be useful as contrast agents for Magnetic Resonance Imaging (MRI). X-ray diffraction of single crystals established that the solid state structures of the Eu(III) and the previously reported [Inorg. Chem. 2004, 43, 5452] Gd(III) complex are identical. The recently discovered sensitizing properties of 1,2-HOPO chelates for Eu(III) luminescence allow direct measurement of the number if water molecules in the metal complex. Fluorescence measurements of the Eu(III) complex corroborate that in solution two water molecules coordinate the lanthanide (q = 2) as proposed from the analysis of NMRD profiles. In addition, fluorescence measurements have verified the anion binding interactions of lanthanide TREN-1,2-HOPO complexes in solution, studied by relaxivity, revealing only very weak oxalate binding (K{sub A} = 82.7 {+-} 6.5 M{sup -1}). Solution thermodynamic studies of the metal complex and free ligand have been carried out using potentiometry, spectrophotometry and fluorescence spectroscopy. The metal ion selectivity of TREN-1,2-HOPO supports the feasibility of using 1,2-HOPO ligands for selective lanthanide binding [pGd = 19.3 (2); pZn = 15.2 (2), pCa = 8.8 (3)].
Date:
May 8, 2007
Creator:
Jocher, Christoph J.; Moore, Evan G.; Xu, Jide; Avedano, Stefano; Botta, Mauro; Aime, Silvio et al.
Object Type:
Article
System:
The UNT Digital Library
1/5-scale experiment of a Mark I boiling-water reactor pressure-suppression system under hypothetical LOCA conditions
Experimental results show the sensitivity of hydrodynamically generated vertical loads to changes in the drywell pressurization rate, downcomer submergence, and vent-line loss coefficient. Insignificant effects on peak vertical loads were observed when the vent-line loss was varied. Peak vertical loads can be reduced by adding initial drywell overpressure so that the downcomers are partly cleared of water. Spatial variation of pressure at about the time of vent clearing is seen in comparisons of data from locations along the axis of the toroidal wetwell.
Date:
July 8, 1977
Creator:
Pitts, J. H. & McCauley, E. W.
Object Type:
Article
System:
The UNT Digital Library
2-D Imaging of Electron Temperature in Tokamak Plasmas
By taking advantage of recent developments in millimeter wave imaging technology, an Electron Cyclotron Emission Imaging (ECEI) instrument, capable of simultaneously measuring 128 channels of localized electron temperature over a 2-D map in the poloidal plane, has been developed for the TEXTOR tokamak. Data from the new instrument, detailing the MHD activity associated with a sawtooth crash, is presented.
Date:
July 8, 2004
Creator:
Munsat, T.; Mazzucato, E.; Park, H.; Domier, C. W.; Johnson, M.; Luhmann, N. C. Jr. et al.
Object Type:
Report
System:
The UNT Digital Library
3-D Silicon Photonic Lattices- Cornerstone of an Emerging Photonics Revolution
Three-dimensional photonic lattices are engineered materials which are the photonic analogues of semiconductors. These structures were first proposed and demonstrated in the mid-to-late 1980's. However, due to fabrication difficulties, lattices active in the infrared are only just emerging. Wide ranges of structures and fabrication approaches have been investigated. The most promising approach for many potential applications is a diamond-like structure fabricated using silicon microprocessing techniques. This approach has enabled the fabrication of 3-D silicon photonic lattices active in the infrared. The structures display band gaps centered from 12{micro} down to 1.55{micro}.
Date:
July 8, 1999
Creator:
Fleming, J.G. & Lin, Shawn-Yu
Object Type:
Article
System:
The UNT Digital Library
A 4 GSa/s Instability Feedback Processing System for Intra-Bunch Instabilities
None
Date:
November 8, 2013
Creator:
Dusatko, J.; Cesaratto, J. M.; Fox, J. D.; Pollock, K.; Rivetta, C. H.; Turgut, O. et al.
Object Type:
Article
System:
The UNT Digital Library
(6)Li, (7)Li Nuclear Magnetic Resonance Investigation of Lithium Coordination in Binary Phosphate Glasses
{sup 6}Li and {sup 7}Li solid state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy has been used to investigate the local coordination environment of lithium in a series of xLi{sub 2}O {center_dot} (1-x)P{sub 2}O{sub 5} glasses, where 0.05 {le} x {le} 0.55. Both the {sup 6}Li and {sup 7}Li show chemical shift variations with changes in the Li{sub 2}O concentration, but the observed {sup 6}Li NMR chemical shifts closely approximate the true isotropic chemical shift and can provide a measure of the lithium bonding environment. The {sup 6}Li NMR results indicate that in this series of lithium phosphate glasses the Li atoms have an average coordination between four and five. The results for the metaphosphate glass agree with the coordination number and range of chemical shifts observed for crystalline LiPO{sub 3}. An increase in the {sup 6}Li NMR chemical shift with increasing Li{sub 2}O content was observed for the entire concentration range investigated, correlating with increased cross-linking of the phosphate tetrahedral network by O-Li-O bridges. The {sup 6}Li chemical shifts were also observed to vary monotonically through the anomalous glass transition temperature (T{sub g}) minimum. This continuous chemical shift variation shows that abrupt changes in the Li coordination …
Date:
February 8, 1999
Creator:
Alam, T.M.; Boyle, T.J.; Brow, R.K. & Conzone, S.
Object Type:
Article
System:
The UNT Digital Library
9-11 Commission Hearing #6, December 8, 2003, Part 1
Recording of the sixith public hearing held by the National Commission on Terrorist Attacks upon the United States on December 8, 2003 at the Russell Senate Office Building in Washington D.C. The Commission heard testimony from four panels of witnesses on domestic intelligence collection, protecting privacy while preventing terrorism, and the use of immigration laws to combat terrorism. This section includes the opening statement by Chairman Kean in addition to the first panel on intelligence collection within the United States.
Date:
December 8, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #6, December 8, 2003, Part 2
Recording of the sixith public hearing held by the National Commission on Terrorist Attacks upon the United States on December 8, 2003 at the Russell Senate Office Building in Washington D.C. The Commission heard testimony from four panels of witnesses on domestic intelligence collection, protecting privacy while preventing terrorism, and the use of immigration laws to combat terrorism.This section includes the panel on protecting privacy, preventing terrorism with testimony from Judith A. Miller, Stewart A. Baker, and Marc Rotenberg.
Date:
December 8, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #6, December 8, 2003, Part 3
Recording of the sixith public hearing held by the National Commission on Terrorist Attacks upon the United States on December 8, 2003 at the Russell Senate Office Building in Washington D.C. The Commission heard testimony from four panels of witnesses on domestic intelligence collection, protecting privacy while preventing terrorism, and the use of immigration laws to combat terrorism. This section includes that panel on preventive detention: use of immigration laws and enemy combatant designations to combat terrorism, with testimony from Jan Ting, Khaled Medhat About El Fadl, and David Martin.
Date:
December 8, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #6, December 8, 2003, Part 4
Recording of the sixith public hearing held by the National Commission on Terrorist Attacks upon the United States on December 8, 2003 at the Russell Senate Office Building in Washington D.C. The Commission heard testimony from four panels of witnesses on domestic intelligence collection, protecting privacy while preventing terrorism, and the use of immigration laws to combat terrorism. This section includes the final panel on government organizations and domestic intelligence with testimony from William P. Barr, John J. Hamre, and John MacGaffin.
Date:
December 8, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #9, April 8, 2004, Part 1
Recording of the ninth public hearing held by the National Commission on Terrorist Attacks upon the United States on April 8, 2004 at the Hart Senate Office Building in Washington, D.C. The Commission heard testimony from Dr. Condoleezza Rice, Assistant to the President for National Security Affairs on the formulation and conduct of U.S. counterterrorism policy.
Date:
April 8, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
The 10-20-30 Plan and Persistent Poverty Counties
This report discusses the 10-20-30 plan of reallocating funds in rural development programs toward counties with systemic poverty levels defined as 20% of the population being at or below poverty level for 30 years. This report explains why targeting funds to persistent poverty counties might be of interest, how "persistent poverty" is defined and measured, and how different interpretations of the definition and different data source selections could yield different lists of counties identified as persistently poor. This report does not compare the 10-20-30 plan's advantages and disadvantages against other policy options, nor does it examine the range of programs or policy goals for which the 1020-30 plan might be an appropriate policy tool.
Date:
February 8, 2018
Creator:
Dalaker, Joseph
Object Type:
Report
System:
The UNT Digital Library
THE 15 LAYER SILICON DRIFT DETECTOR TRACKER IN EXPERIMENT 896.
Large linear silicon drift detectors have been developed and are in production for use in several experiments. Recently 15 detectors were used as a tracking device in BNL-AGS heavy ion experiment (E896). The detectors were successfully operated in a 6.2 T magnetic field. The behavior of the detectors, such as drift uniformity, resolution, and charge collection efficiency are presented. The effect of the environment on the detector performance is discussed. Some results from the experimental run are presented. The detectors performed well in an experimental environment. This is the first tracking application of these detectors.
Date:
November 8, 1998
Creator:
Pandy, S. U.
Object Type:
Article
System:
The UNT Digital Library
A 20 - Red River Army Depot, TX, Community Presentation
Red River Army Depot, Texas, local community presentation of 21 June 05
Date:
November 8, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
A 30" Bubble Chamber Proposal
None
Date:
August 8, 1972
Creator:
Gidal, G.; Birge, R. W.; Lander, R.; Ko, W.; Pellet, D. & Yaeger, P.
Object Type:
Report
System:
The UNT Digital Library
40 Years of Discovery
History is most interesting when seen through the eyes of those who lived it. In this 40th anniversary retrospective of bioscience research at Lawrence Livermore National Laboratory, we've asked 19 scientists to share their personal recollections about a major accomplishment in the program's history. We have not tried to create a comprehensive or seamless story. Rather, we've attempted to capture the perspectives of key individuals, each of whom worked on a research program that met significant milestones. We have focused particularly on programs and accomplishments that have shaped the current Biology and Biotechnology Research Program (BBRP). In addition, we have included a timeline of biosciences at LLNL, a history of the directorate that appeared in the Laboratory's magazine, ''Science & Technology Review'', in 2002, and a list of bioscience-related articles that have appeared over the years in ''Science & Technology Review and its predecessor, Energy & Technology Review''. The landscape of biological science today is stunningly different from 40 years ago. When LLNL bioscience began in 1963, we knew about the structure of DNA and that it was the carrier of genetic information. However, it would be another year before scientists would understand how DNA codes for the production of …
Date:
July 8, 2003
Creator:
Heller, Arnie; Henke, Amy; Weinstein, Bert & Thomas, Cindy
Object Type:
Report
System:
The UNT Digital Library
45-Day safety screening report for grab samples from Tank 241-AP-107
Three samples; 107-AP-1C, 107-AP-2c and 107-AP-3C; were received at 222-S Laboratory for analysis of DSC, TGA and visual appearance. Four additional samples; 107-AP-1D, 107-AP-2D, 107-AP-3D and 107-AP-6; were received for visual appearance only. No results exceeded the safety screen notification criteria. This report compiles the analytical results. Tank 241-AP-107 is a double-shell tank which is not on any of the four Watch Lists.
Date:
March 8, 1995
Creator:
Miller, George L.
Object Type:
Report
System:
The UNT Digital Library
100 Area Columbia River sediment sampling
Forty-four sediment samples were collected from 28 locations in the Hanford Reach of the Columbia River to assess the presence of metals and man-made radionuclides in the near shore and shoreline settings of the Hanford Site. Three locations were sampled upriver of the Hanford Site plutonium production reactors. Twenty-two locations were sampled near the reactors. Three locations were sampled downstream of the reactors near the Hanford Townsite. Sediment was collected from depths of 0 to 6 in. and between 12 to 24 in. below the surface. Samples containing concentrations of metals exceeding the 95 % upper threshold limit values (DOE-RL 1993b) are considered contaminated. Contamination by arsenic, chromium, copper, lead, and zinc was found. Man-made radionuclides occur in all samples except four collected opposite the Hanford Townsite. Man-made radionuclide concentrations were generally less than 1 pCi/g.
Date:
September 8, 1993
Creator:
Weiss, S. G.
Object Type:
Report
System:
The UNT Digital Library
100 Areas, January 29 through February 4, 1946
The B Pile operated 25 MW below rated power level without interruption during the week. The D Pile was shut down on January 29. During the shutdown 103 tubes were discharged. The shut down lasted for 15 hours. During operation after the shut down power was reduced to meet graphite temperature restrictions. The F Pile was run steadily throughout the week at 25 MW below rated level. Iron content in the process water averaged 0.015, 0.011 and 0.010 ppm at B, D, and F Areas, respectively. Examination of the slugs discharged from four corrosion tubes at F has been completed. A summary of conditions found in the vertical and horizontal aluminium thimbles at D and F during a recent inspection are given. Results are given on the graphite expansion problem.
Date:
February 8, 1946
Creator:
Jordan, W. E.
Object Type:
Report
System:
The UNT Digital Library
100 Areas technical activities report: Physics, May 1950
This monthly report details the 100 Area technical activities of the Physics Group for the month of May 1950.
Date:
June 8, 1950
Creator:
Gast, P. F.
Object Type:
Report
System:
The UNT Digital Library
100 Femtosecond laser absorption in solid density targets
Experimental short pulse lasers are rapidly approaching energy levels where target irradiances exceeding 10{sup 20} W/CM{sup 2} are routinely achievable. These high intensity levels will open up a new class of solid target interaction physics where relativistic effects must be included and non-traditional absorption mechanisms become significant. However much remains to be understood of the absorption physics at lower intensities where classical absorption is dominated by collisional and resonance absorption. If attention is paid to producing clean laser pulses that do not significantly pre-pulse interact with the target, it is possible to produce plasmas of sufficiently short scale length that near-solid density interactions are observable at intensities exceeding 10{sup 18} W/CM{sup 2} for 100 fs laser irradiation. We report here extensions to our previous efforts at normal incidence that expand our observations to non-normal angles including the effect of polarization for several target materials. Between 10{sup 13} W/CM{sup 2} and 10{sup 14} W/CM{sup 2} we observe that the target absorption retains a signature of the intra-band atomic transitions. At higher intensities a more material independent ion-electron collisional absorption and short scale length resonance absorption dominate. P - polarized absorption in short scale length plasmas has been observed to exceed 60 …
Date:
October 8, 1996
Creator:
Price, D. F.; More, R. M.; Walling, R. S. & Stewart, R. E.
Object Type:
Article
System:
The UNT Digital Library
100-K water plant facilities data for G.E. scoping
This report discusses seven items related to the design of the 100-K water plant facilities. These items include: the number of process water connections to the reactor building, valving at the control building, and number of main pumping units; effect on heating system of the Hanford power outage during the winter period; reactor supply conditions; power requirements and steam flow at the local power plant; the service water system; general arrangement of the heat exchanger building; and pumping station control.
Date:
August 8, 1952
Creator:
Patterson, R. K.
Object Type:
Report
System:
The UNT Digital Library
100-N Decontamination Facility Design Guide.
Space has been reserved near the southeast corner of the 100-N Area for the 122-N Decontamination Facility. Previous correspondence between Burns and Roe, Inc and General Electric bae discussed various facilities which might be needed in the building. The concepts of the decontamination processes are under active development by research groups at Hanford. At present, there are several workable processes known; each one has one or more fairly serious drawbacks.
Date:
March 8, 1960
Creator:
Bainard, W. D.
Object Type:
Report
System:
The UNT Digital Library
105-K Basin material design basis feed description for spent nuclear fuel project facilities
Revisions 0 and 0A of this document provided estimated chemical and radionuclide inventories of spent nuclear fuel and sludge currently stored within the Hanford Site`s 105-K Basins. This Revision (Rev. 1) incorporates the following changes into Revision 0A: (1) updates the tables to reflect: improved cross section data, a decision to use accountability data as the basis for total Pu, a corrected methodology for selection of the heat generation basis fee, and a revised decay date; (2) adds section 3.3.3.1 to expand the description of the approach used to calculate the inventory values and explain why that approach yields conservative results; (3) changes the pre-irradiation braze beryllium value.
Date:
January 8, 1998
Creator:
Praga, A. N.
Object Type:
Report
System:
The UNT Digital Library