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Rapid Mass Spectrometric DNA Diagnostics for Assessing Microbial Community Activity During Bioremediation
Changes in pollutant profiles observed in contaminated soils have been attributed to biological activity when in actuality abiotic processes caused pollutant removal.1 This sometimes casual implication of biodegradation is not acceptable, but understandable, because factors which cause the disappearance of pollutants are not always easy to identify. Several pollutant removal or transformation pathways are possible with most pollutants found in soil and these processes may or may not operate independently. Careful evaluation of bioremediation necessitates that all transformation and removal pathways are anticipated so that the pathways are either controlled or monitored but in practice this is generally not possible. The diminution in pollutant oxidation might track with several candidate loss mechanisms and when this occurs the real cause becomes problematic to pin point. Many factors disguise or prevent the effectual tracking of bioremediation processes among which are three general types of problems: (1) The estimate that only about 0.1% or less of the microorganisms living in soils are culturable leads to the conclusion that the possibility for unknown organisms participating in a biodegradation pathway is high. How should these imperceptible microorganisms be tracked? (2) The diversity of the microcosm is large, yet several different genera have been shown to …
Date:
December 31, 1999
Creator:
Benner, W. Henry; Hunter-Cevera, Jennie & Jaklevic, Joseph M.
Object Type:
Report
System:
The UNT Digital Library
Rapid Mass Spectrometric DNA Diagnostics for Assessing Microbial Community Activity During Bioremediation
Changes in pollutant profiles observed in contaminated soils have been attributed to biological activity when in actuality abiotic processes caused pollutant removal.1 This sometimes casual implication of biodegradation is not acceptable, but understandable, because factors which cause the disappearance of pollutants are not always easy to identify. Several pollutant removal or transformation pathways are possible with most pollutants found in soil and these processes may or may not operate independently. Careful evaluation of bioremediation necessitates that all transformation and removal pathways are anticipated so that the pathways are either controlled or monitored but in practice this is generally not possible. The diminution in pollutant oxidation might track with several candidate loss mechanisms and when this occurs the real cause becomes problematic to pin point. Many factors disguise or prevent the effectual tracking of bioremediation processes among which are three general types of problems: (1) The estimate that only about 0.1% or less of the microorganisms living in soils are culturable leads to the conclusion that the possibility for unknown organisms participating in a biodegradation pathway is high. How should these imperceptible microorganisms be tracked? (2) The diversity of the microcosm is large, yet several different genera have been shown to …
Date:
December 31, 1999
Creator:
Benner, W. Henry; Hunter-Cevera, Jennie; Jaklevic, Joseph M. & Torok, Tamas
Object Type:
Report
System:
The UNT Digital Library
Resonant and Non-Resonant Inelastic X-Ray Scattering in Cugeo{Sub 3}
Transition metal oxides are presently the focus of much attention in condensed matter physics because of the diverse phenomena exhibited by these materials. Examples include antiferromagnetism, superconductivity and colossal magnetoresistance. The origin of these phenomena lies in the strong electron correlations present in these materials which place them between the well understood limits of band insulators and simple metals. The presence of these correlations makes these materials hard to handle theoretically, and there is a need for more detailed experimental work, in particular in regard to the electronic structure and excitations.
Date:
December 31, 1999
Creator:
V. Zimmermann, M.; Hill ,J. P.; Kao, C. C.; Gog, T.; Venkataraman, C.; Bommannavar, A. et al.
Object Type:
Report
System:
The UNT Digital Library
Routine Radiological Environmental Monitoring Plan. Volume 1
The U.S. Department of Energy manages the Nevada Test Site in a manner that meets evolving DOE Missions and responds to the concerns of affected and interested individuals and agencies. This Routine Radiological Monitoring Plan addressess complicance with DOE Orders 5400.1 and 5400.5 and other drivers requiring routine effluent monitoring and environmental surveillance on the Nevada Test Site. This monitoring plan, prepared in 1998, addresses the activities conducted onsite NTS under the Final Environmental Impact Statement and Record of Decision. This radiological monitoring plan, prepared on behalf of the Nevada Test Site Landlord, brings together sitewide environmental surveillance; site-specific effluent monitoring; and operational monitoring conducted by various missions, programs, and projects on the NTS. The plan provides an approach to identifying and conducting routine radiological monitoring at the NTS, based on integrated technical, scientific, and regulatory complicance data needs.
Date:
December 31, 1999
Creator:
Nevada, Bechtel
Object Type:
Report
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 85, No. 93, Ed. 1 Friday, December 31, 1999
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 31, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Sealy News (Sealy, Tex.), Vol. 112, No. 106, Ed. 1 Friday, December 31, 1999
Semiweekly newspaper from Sealy, Texas that includes local, state, and national news along with advertising.
Date:
December 31, 1999
Creator:
Chionsini, Brandi
Object Type:
Newspaper
System:
The Portal to Texas History
Second Generation Advanced Reburning for High Efficiency NOx Control
This project is designed to develop a family of novel NO{sub x} control technologies, called Second Generation Advanced Reburning (SGAR) which has the potential to achieve 90+ NO{sub x} control in coal fired boilers at a significantly lower cost than Selective Catalytic Reduction. The ninth reporting period in Phase II (October 1-December 31, 1999) included preparation of the 10 x 10{sup 6} Btu/hr Tower Furnace for tests and setting the SGAR model to predict process performance under Tower Furnace conditions. Based on results of previous work, a paper has been prepared and submitted for the presentation at the 28 Symposium (International) on Combustion to be held at the University of Edinburgh, Scotland.
Date:
December 31, 1999
Creator:
Zamansky, Vladimir M. & Lissianski, Vitali V.
Object Type:
Report
System:
The UNT Digital Library
Sorption of Colloids, Organics, and Metals onto Gas-Water Interfaces: Transport Processes and Potential Remediation Technology
The knowledge gap on vadose zone colloid transport limits predicting contaminant transport at many DOE sites, and remains an outstanding scientific challenge. Although the process of contaminant sorption at mineral surfaces has received much recognition as a major mechanism controlling contaminant behavior in subsurface environments, virtually little attention has been given to the possibility of contaminant sorption at gas-water interfaces, a major interface in the vadose zone. Moreover, little effort has yet been advanced to optimize such interactions for the purpose of facilitating in-situ remediation. Gas-water interfaces, unlike water-solid interfaces, are mobile. Therefore, associations of contaminants with gas-water interfaces can be very important not only in subsurface contaminant distributions, but also in contaminant mobilization, and potentially in remediation. The first objective of this project was to develop a fundamental understanding of interactions between contaminants and gas-water interfaces. For surface-active molecules, surface excesses can be determined through the Gibbs equation combined with measuring changes in surface tension with respect to changes in their solution concentration. However, for surface-active colloids, surface tension changes are too small to measure. Until initiation of this research project, there were no techniques available for quantifying sorption of colloids at gas-water interfaces. The second purpose of the …
Date:
December 31, 1999
Creator:
Wan, Jiamin
Object Type:
Report
System:
The UNT Digital Library
Source Signatures of Fine Particulate Matter from Petroleum Refining and Fuel Use
Combustion experiments were carried out on four different residual fuel oils in a 732 kW boiler. Particulate matter (PM) emission samples were separated aerodynamically by a cyclone into fractions that were nominally less than and greater than 2.5 microns in diameter. However, examination of several of the samples by computer-controlled scanning electron microscopy (CCSEM) revealed that part of the <2.5 micron fraction (PM{sub 2.5}) in fact consists of carbonaceous cenospheres and vesicular particles that range up to 10 microns in diameter. X-ray absorption fine structure (XAFS) spectroscopy data were obtained at the S, V, Ni, Fe, Cu, Zn, and As Kedges, and at the Pb L-edge. Deconvolution of the x-ray absorption near edge structure (XANES) region of the S spectra established that the dominant molecular forms of S present were sulfate (26-84% of total S) and thiophene (13-39% of total S). Sulfate was greater in the PM{sub 2.5} samples than in the >2.5 micron samples (PM{sub 2.5+}). Inorganic sulfides and elemental sulfur were present in lower percentages. The Ni XANES spectra from all of the samples agree fairly well with that of NiSO4, while most of the V spectra closely resemble that of vanadyl sulfate (VO{center_dot}SO{sub 4}{center_dot}xH{sub 2}O). The other …
Date:
December 31, 1999
Creator:
Huffman, Gerald P.; Huggins, Frank E.; Shah, Naresh & Huggins, Robert
Object Type:
Report
System:
The UNT Digital Library
State Governance of Elementary and Secondary Education
None
Date:
December 31, 1999
Creator:
Apling, Richard N.
Object Type:
Report
System:
The UNT Digital Library
Superconducting Open-Gradient Magnetic Separation for the Pretreatment of Radioactive or Mixed Waste Vitrification Feeds
An open-gradient magnetic separation (OGMS) process is being considered to separate deleterious elements from radioactive and mixed waste streams prior to vitrification or stabilization. By physically segregating solid wastes and slurries based on the magnetic properties of the solid constituents, this potentially low-cost process may serve the U.S. Department of Energy (DOE) by reducing the large quantities of glass produced from defense-related high-level waste (HLW). Furthermore, the separation of deleterious elements from low-level waste (LLW) also can reduce the total quantity of waste produced in LLW immobilization activities. Many HLW 'and LLW waste' streams at both Hanford and the Savannah River Site (SRS) include constituents deleterious to the durability of borosilicate glass and the melter many of the constituents also possess paramagnetism. For example, Fe, Cr, Ni, and other transition metals may limit the waste loading and affect the durability of the glass by forming spine1 phases at the high operating temperature used in vitrification. Some magnetic spine1 phases observed in glass formation are magnetite (Fe,O,), chromite (FeCrO,), and others [(Fe, Ni, Mg, Zn, Mn)(Al, Fe, Ti, Cr)O,] as described elsewhere [Bates-1994, Wronkiewicz-1994] Stable spine1 phases can cause segregation between the glass and the crystalline phases. As a consequence of …
Date:
December 31, 1999
Creator:
Nunez, L.; Kaminsky, M. D.; Doctor, R. D.; Crawford, C. & Ritter, J. A.
Object Type:
Report
System:
The UNT Digital Library
SUPPORT FOR THE COMPLETION OF THE ARM PROJECT AND DEVELOPMENT OF A FIELD DEMONSTRATION OF THE GWIS MODEL FOR A VIRTUAL ENTERPRISE
Strategic Technology Resources, L.L.C. (STR) provided work for Los Alamos National Laboratory (LANL) in response to Request for Proposal 005BZ0019-35. The objectives of the work in this project were to: (1) support the completion of the Advanced Reservoir Management (ARM) cooperative research and development agreement (CRADA) LA9502037, and (2) support the development of a field demonstration of the LANL-developed Global Weapons Information System (GWIS) model for virtual enterprises. The second objective was contingent upon DOE approval of the Advanced Information Management (AIM) CRADA. At the request of the LANL Technical Representative, the project was granted a no-cost extension to November 30, 1999. As part of the project, STR provided managerial support for the ARM CRADA by: (1) assessing the data resources of the participating companies, (2) facilitating the transfer of technical data to LANL, (3) preparing reports, (4) managing communications between the parties to the ARM CRADA, and (5) assisting with the dissemination of information between the parties to technical professional societies and trade associations. The first phase of the current project was to continue to engage subcontractors to perform tasks in the ARM CRADA for which LANL expertise was lacking. All of the ARM field studies required of the …
Date:
December 31, 1999
Creator:
MARTIN, F. DAVID & MARK B. MURPHY - STRATEGIC TECHNOLOGY RESOURCES, LLC
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 24, Number 53, Pages 11827-12168, December 31, 1999
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
December 31, 1999
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Savings and Loan Department Savings Institutions Annual Report: 1999
Annual report of the Texas Savings and Loan Department documenting savings and loan associations in the state through a series of tables documenting overall statistics, various financial statements, and breakdowns by size and location.
Date:
December 31, 1999
Creator:
Texas. Savings and Loan Department.
Object Type:
Report
System:
The Portal to Texas History
TRUPACT-II Operating and Maintenance Instructions
The purpose of this document is to provide the technical requirements for preparation for use, operation, inspection, and maintenance of a Transuranic Package Transporter Model II (TRUPACT-II) Shipping Package and directly related components. This document complies with the minimum requirements as specified in the TRUPACT-II Safety Analysis Report for Packaging (SARP) and Nuclear Regulatory Commission (NRC) Certificate of Compliance (C of C) 9218. In the event there is a conflict between this document and the TRUPACT-II SARP, the TRUPACT-II SARP shall govern. TRUPACT-II C of C number 9218 states, ''... each package must be prepared for shipment and operated in accordance with the procedures described in Chapter 7.0, Operating Procedures, of the application.'' It further states, ''... each package must be tested and maintained in accordance with the procedures described in Chapter 8.0, Acceptance Tests and Maintenance Program of the application.'' Chapter 9 of the TRUPACT-II SARP charges the Westinghouse Electric Corporation Waste Isolation Division (WID) with assuring that the TRUPACT-II is used in accordance with the requirements of the C of C. To meet this requirement and verify consistency of operations when loading and unloading the TRUPACT-II on the trailer, placing a payload in the packaging, unloading the payload …
Date:
December 31, 1999
Creator:
Westinghouse Electric Corporation, Waste Isolation Division
Object Type:
Report
System:
The UNT Digital Library
Two-Phase Reaction Turbine. Technical progress report for the period July-December 1999
During the initial part of this period the concentrated effort was placed on getting comprehensive analysis and design of the turbine prototype. This was in order to be able to initiate its fabrication as needed for its building, assembling and timely testing. In the second part of this period the effort was placed on design and other considerations needed to acquire the test rig within the limited budget based on subsequent grant from the DOE.
Date:
December 31, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[Two Police Officers and a Woman on New Year's Eve]
Photograph of two Dallas Police officers posing with a woman on New Year's Eve in Dallas, Texas. All three individuals are looking directly at the camera. The woman is wearing one of the police officer's hats and appears to be a member of a news team.
Date:
December 31, 1999
Creator:
Williams, Byrd M. (Byrd Moore), IV, 1951-
Object Type:
Photograph
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 124, No. 31, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
December 30, 1999
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 100, No. 244, Ed. 1 Thursday, December 30, 1999
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 52, Ed. 1 Thursday, December 30, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Canadian Record (Canadian, Tex.), Vol. 109, No. 52, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Canadian, Texas that includes local, state and national news along with extensive advertising.
Date:
December 30, 1999
Creator:
Ezzell, Nancy & Brown, Laurie Ezzell
Object Type:
Newspaper
System:
The Portal to Texas History
A Characterization and Evaluation of Coal Liquefaction Process Streams. Results of Inspection Tests on Nine Coal-Derived Distillation Cuts in the Jet Fuel Boiling Range
This report describes the assessment of the physical and chemical properties of the jet fuel (180-300 C) distillation fraction of nine direct coal liquefaction products and compares those properties to the corresponding specifications for aviation turbine fuels. These crude coal liquids were compared with finished fuel specifications specifically to learn what the refining requirements for these crudes will be to make them into finished fuels. The properties of the jet fuel fractions were shown in this work to require extensive hydrotreating to meet Jet A-1 specifications. However, these materials have a number of desirable qualities as feedstocks for the production of high energy-density jet fuels.
Date:
December 30, 1999
Creator:
Brandes, S. D. & Winschel, R. A.
Object Type:
Report
System:
The UNT Digital Library
Cherokeean/Herald (Rusk, Tex.), Vol. 150, No. 45, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
December 30, 1999
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
The Colony Courier-Leader (The Colony, Tex.), Vol. 18, No. 36, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Fleming, Jackie
Object Type:
Newspaper
System:
The Portal to Texas History