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Identification and Characterization of Genes Required for Symbiotic Nitrogen Fixation in Medicago truncatula Tnt1 Insertion Mutants

Description: In this dissertation I am using M. truncatula as a model legume that forms indeterminate nodules with rhizobia under limited nitrogen conditions. I take advantage of an M. truncatula Tnt1 mutant population that provides a useful resource to uncover and characterize novel genes. Here, I focused on several objectives. First, I carried out forward and reverse genetic screening of M. truncatula Tnt1 mutant populations to uncover novel genes involved in symbiotic nitrogen fixation. Second, I focused… more
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Date: July 2023
Creator: Cai, Jingya
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Rapid identification of causative insertions underlying Medicago truncatula Tnt1 mutants defective in symbiotic nitrogen fixation from a forward genetic screen by whole genome sequencing

Description: This article demonstrates that whole genome sequencing is an efficient approach for identification of causative genes underlying symbiotic nitrogen fixation defective phenotypes in Medicago truncatula Tnt1 insertion mutants obtained via forward genetic screens.
Date: February 27, 2016
Creator: Veerappan, Vijaykumar; Jani, Mehul; Kadel, Khem; Troiani, Taylor; Gale, Ronny; Mayes, Tyler et al.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

Forward Genetic Characterization of Medicago truncatula Tnt1 Insertion Mutants Defective in Nodule Development and Symbiotic Nitrogen Fixation

Description: Legumes are unique plants because they form special structures “nodules”, via symbiotic relationships with rhizobial bacteria present in the soil. Once rhizobia mature inside nodules, they fix atmospheric nitrogen providing a source of bioavailable nitrogen to the plant. To discover novel genetic components involved in the legume-rhizobia symbiosis by using forward genetic screening, we have isolated Medicago truncatula Tnt1 insertion mutants in the R108 ecotype, which are defective in nodule d… more
Date: May 2015
Creator: Kadel, Khem L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Mobility of Source Zone Heavy Metals and Radionuclides: The Mixed Roles of Fermentative Activity on Fate and Transport of U and Cr. Final Report

Description: Various U. S. Department of Energy (DOE) low and medium-level radioactive waste sites contain mixtures of heavy metals, radionuclides and assorted organic materials. In addition, there are numerous sites around the world that are contaminated with a mixture of organic and inorganic contaminants. In most sites, over time, water infiltrates the wastes, and releases metals, radionuclides and other contaminants causing transport into the surrounding environment. We investigated the role of fermenta… more
Date: January 29, 2014
Creator: Gerlach, Robin; Peyton, Brent M. & Apel, William A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

EDS V25 containment vessel explosive qualification test report.

Description: The V25 containment vessel was procured by the Project Manager, Non-Stockpile Chemical Materiel (PMNSCM) as a replacement vessel for use on the P2 Explosive Destruction Systems. It is the first EDS vessel to be fabricated under Code Case 2564 of the ASME Boiler and Pressure Vessel Code, which provides rules for the design of impulsively loaded vessels. The explosive rating for the vessel based on the Code Case is nine (9) pounds TNT-equivalent for up to 637 detonations. This limit is an increas… more
Date: April 1, 2012
Creator: Rudolphi, John Joseph
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SPE2 Far-field Seismic Data Quicklook

Description: The purpose of this report is to provide a brief overview of the far-field seismic data collected by the array of instruments (Figures 1 and 2) deployed by the Source Physics experiment for shots 1 (roughly 100 kg TNT equivalent at a depth of 60 m) and shot 2, (roughly 2000 kg TNT equivalent at a depth of 45 m). 'Far-field' is taken to refer to instruments in the zone of purely elastic response at distances of 100 m or greater. The primary focus is data from the main instrument array and hence … more
Date: February 14, 2012
Creator: Mellors, R. J.; Harben, P.; Ford, S.; Walter, W. R.; Hauk, T.; Ruppert, S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pre-shot simulations of far-field ground motion for the Source Physics Experiment (SPE) Explosions at the Climax Stock, Nevada National Security Site: SPE2

Description: The Source Physics Experiment (SPE) is planning a 1000 kg (TNT equivalent) shot (SPE2) at the Nevada National Security Site (NNSS) in a granite borehole at a depth (canister centroid) of 45 meters. This shot follows an earlier shot of 100 kg in the same borehole at a depth 60 m. Surrounding the shotpoint is an extensive array of seismic sensors arrayed in 5 radial lines extending out 2 km to the north and east and approximately 10-15 to the south and west. Prior to SPE1, simulations using a fin… more
Date: October 18, 2011
Creator: Mellors, R J; Rodgers, A; Walter, W; Ford, S; Xu, H; Matzel, E et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

INDEPENDENT CONFIRMATORY SURVEY REPORT FOR THE REACTOR BUILDING, HOT LABORATORY, PRIMARY PUMP HOUSE, AND LAND AREAS AT THE PLUM BROOK REACTOR FACILITY, SANDUSKY, OHIO

Description: In 1941, the War Department acquired approximately 9,000 acres of land near Sandusky, Ohio and constructed a munitions plant. The Plum Brook Ordnance Works Plant produced munitions, such as TNT, until the end of World War II. Following the war, the land remained idle until the National Advisory Committee for Aeronautics later called the National Aeronautics and Space Administration (NASA) obtained 500 acres to construct a nuclear research reactor designed to study the effects of radiation on ma… more
Date: October 10, 2011
Creator: Bailey, Erika N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Standoff ultraviolet raman scattering detection of trace levels of explosives.

Description: Ultraviolet (UV) Raman scattering with a 244-nm laser is evaluated for standoff detection of explosive compounds. The measured Raman scattering albedo is incorporated into a performance model that focused on standoff detection of trace levels of explosives. This model shows that detection at {approx}100 m would likely require tens of seconds, discouraging application at such ranges, and prohibiting search-mode detection, while leaving open the possibility of short-range point-and-stare detectio… more
Date: October 1, 2011
Creator: Kulp, Thomas J.; Bisson, Scott E. & Reichardt, Thomas A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

[Six TNT members in workroom]

Description: Photograph of six members of the Teach North Texas program in the offices and workroom space at the UNT College of Education. The two closest are sitting at a table with computers and behind them another four are seated around a collection of tables and one has a laptop open in front of her.
Date: June 8, 2011
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[TNT members at computers]

Description: Photograph of four members of the Teach North Texas program in the offices and workroom space at the UNT College of Education. They are seated at a group of desks with computers in front of them.
Date: June 8, 2011
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[TNT members in office]

Description: Photograph of five members of the Teach North Texas program in the offices and workroom space at the UNT College of Education. They are seated at a group of desks with computers in front of them.
Date: June 8, 2011
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[TNT members in workroom]

Description: Photograph of four members of the Teach North Texas program in the offices and workroom space at the UNT College of Education. They are seated around a collection of tables and one has a laptop open in front of her. Behind them another member of the group is working at a desk.
Date: June 8, 2011
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[Two TNT members at picnic table]

Description: Photograph of two Teach North Texas program members sitting at a picnic table during the group's Spring Picnic. They are in an open park and there are plates with food in front of them and the parking lot is visible behind them. There is also a child on the other side of the table.
Date: June 8, 2011
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[Two TNT members at table under pavilion]

Description: Photograph of two Teach North Texas program members sitting at a picnic table during the group's Spring Picnic. They are in an open park and are under a pavilion. There are plates with food in front of them and the parking lot is visible behind them.
Date: June 8, 2011
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections
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