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Catalysis of PAH Biodegradation by Humic Acid Shown in Synchrotron Infrared Studies
The role of humic acid (HA) in the biodegradation of toxic polycyclic aromatic hydrocarbons (PAHs) has been the subject of controversy, particularly in unsaturated environments. By utilizing an infrared spectromicroscope and a very bright, nondestructive synchrotron photon source, we monitored in situ and, over time, the influence of HA on the progression of degradation of pyrene (a model PAH) by a bacterial colony on a magnetite surface. Our results indicate that HA dramatically shortens the onset time for PAH biodegradation from 168 to 2 h. In the absence of HA, it takes the bacteria about 168 h to produce sufficient glycolipids to solubilize pyrene and make it bioavailable for biodegradation. These results will have large implications for the bioremediation of contaminated soils.
Date:
September 26, 2001
Creator:
Holman, Hoi-Ying N.; Nieman, Karl; Sorensen, Darwin L.; Miller, Charles D.; Martin, Michael C.; Borch, Thomas et al.
Object Type:
Article
System:
The UNT Digital Library
U.S. National Committee for CODATA. Final technical report: September 15, 1996 to September 14, 2000
This report describes the activities of the U.S. National Committee (USNC) for CODATA from September 16, 1996, through September 14, 2000. The USNC/CODATA counsels the U.S. National Delegate to CODATA on the U.S. position regarding official CODATA business. It also provides a link between the United States and international data compilation and evaluation activities, taking into account the needs of the scientific and technological user community, and undertakes special studies and other actions consistent with the overall CODATA objectives.
Date:
January 26, 2001
Creator:
Uhlir, Paul F.
Object Type:
Report
System:
The UNT Digital Library
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 22, Ed. 1, Thursday, April 26, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
April 26, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Register, Volume 26, Number 4, Pages 857-1040, January 26, 2001
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 Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents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:
January 26, 2001
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 26, Number 43, Pages 8405-8596, October 26, 2001
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:
October 26, 2001
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[News Clip: Moody]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
December 26, 2001
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
["Wariness and Optimism Vie as Gays View New President" article, January 26, 2001]
An article written by Elizabeth Becker for the New York Times about the acknowledgement of the Republican Unity Coalition and inclusion of gay and lesbian people in ceremonies. The piece also speaks about the opinions of the new president George W. Bush and vice president Dick Cheney.
Date:
January 26, 2001
Creator:
Becker, Elizabeth
Object Type:
Article
System:
The UNT Digital Library
Small Business: HUBZone Program Suffers From Reporting and Implementation Difficulties
A letter report issued by the General Accounting Office with an abstract that begins "Congress created the Historically Underutilized Business Zone (HUBZone) program to stimulate economic development and create jobs in distressed urban and rural areas. To achieve these goals, the HUBZone program provides small businesses with greater access to federal contracting opportunities. Reported HUBZone program achievements for fiscal year 2000 were inaccurate because of data entry errors and insufficient guidance on how to report agency data. Federal agencies are having difficulty implementing the HUBZone program. The primary reasons that federal contracting personnel gave for not using the HUBZone program to award contracts were (1) the small number of Small Business Administration (SBA) certified HUBZone firms, (2) difficulty identifying certified firms with the capabilities needed by federal agencies, (3) SBA's guidance that emphasizes the 8(a) program over the HUBZone program, and (4) easier and quicker procedures to award contracts under the 8(a) program."
Date:
October 26, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Contract Management: DOD's Profit Policy Provision to Stimulate Innovation Needs Clarification
A letter report issued by the General Accounting Office with an abstract that begins "In negotiating profit on contracts, the Department of Defense (DOD) requires contracting officers to set negotiating objectives by relying on guidelines in defense regulations. Congress mandated that DOD review its profit guidelines and consider whether modifying them would provide more incentive for contractors to develop and produce complex and innovative new technologies for weapon systems. After completing its review, DOD issued a final rule in December 2000 that added a technology incentive to its guidelines for setting profit objectives on negotiated defense contracts. This report reviews whether the new policy is (1) likely to achieve its intended objective of stimulating increased innovation and (2) consistent with the revised policies for acquiring weapons systems. GAO found that the new profit policy may have limited effect on incentivizing additional innovation because the policy has limited reach during research and development and it does not provide adequate guidance on when to apply the incentive. The policy may not reinforce DOD's emphasis on technology maturity in its guidance on the system acquisition process."
Date:
July 26, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Canceled DOD Appropriations: $615 Million of Illegal or Otherwise Improper Adjustments
A letter report issued by the General Accounting Office with an abstract that begins "This report reviews the Department of Defense's (DOD) handling of appropriated funds from expired appropriation accounts. In 1990, Congress changed the law governing the use of appropriation accounts because it concluded that controls over them were not working. Without adequate controls, Congress was concerned that agencies could disburse money in amounts and for purposes that it had not approved. GAO found that DOD improperly charged appropriation accounts after they were closed. GAO also found that DOD did not establish the requisite systems, controls, and managerial attention required to properly account for its disbursements consistent with the 1990 account closing law. As a result, DOD made at least $615 million of illegal or otherwise improper adjustments during fiscal year 2000 alone. DOD was aware of the limitations the account closing law placed on the availability of canceled appropriations and that the law was enacted because of previous abuses by DOD. DOD also knew that a major system used to control its use of appropriations allowed for disbursements to be charged in a way that was inconsistent with the law. However, DOD did nothing to fix the system, …
Date:
July 26, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Retirement Savings: Opportunities to Improve DOL's SAVER Act Campaign
A letter report issued by the General Accounting Office with an abstract that begins "Many of today's workers may not be financially prepared for retirement when they stop working. Many people are counting on Social Security alone, without an additional retirement plan. The Savings Are Vital to Everyone's Retirement (SAVER) Act of 1997 requires the Department of Labor (DOL) to hold periodic national summits and run an outreach program to promote retirement saving. This report (1) identifies major accomplishments of the 1998 summit and issues that might affect future summits, (2) describes DOL's outreach program, and (3) determines what DOL knows about the effectiveness of the summit and outreach program. GAO found that the 1998 National Summit made progress in identifying problems that workers face in saving for retirement. DOL's Outreach Program--the Retirement Savings Education Campaign--targets of small business owners, women, minorities, and youth to change the way they think about, and act on, their retirement saving needs. DOL has not tried to assess the extent to which outreach efforts from the 1998 National Summit and Pension and Welfare Benefits Administration have increased the public's knowledge and understanding of retirement savings."
Date:
June 26, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Military Personnel: Full Extent of Support to Civil Authorities Unknown but Unlikely to Adversely Impact Retention
A letter report issued by the General Accounting Office with an abstract that begins "The Department of Defense (DOD) provides a wide range of support to many organizations at home and abroad. GAO estimates that, in fiscal year 1999, DOD provided support in at least 7,125 instances to 345 or more entities, including international organizations; private citizens; and federal, state, local, and foreign governments. This support consumed more than two million military staff-days. GAO could not determine the total cost of DOD's support because of the limited data it received. However, it conservatively estimates the cost to be about $180 million. Providing assistance to civil authorities does not appear to harm retention. DOD data show that overall retention has remained relatively stable during the last decade. There are alternatives to the use of military personnel. DOD and some civil entities have used contractors rather than military personnel for some activities, such as construction, transportation, and medical treatment. There are limitations on the kinds of support that contractors can provide, however. For most of the 197 support instances GAO reviewed that occurred in 1997-99 for the State Department, the Drug Enforcement Administration, and the Secret Service, DOD billed and collected about …
Date:
January 26, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
D.C. Tuition Assistance Grants: Program May Increase College Choices, but a Few Program Procedures May Hinder Grant Receipt for Some Residents
A letter report issued by the General Accounting Office with an abstract that begins "Twenty-one percent of grant-eligible applicants who did not use the District of Columbia's tuition assistance grant (TAG) funding to attend a participating college or university may have encountered such barriers as college entrance requirements and the absence of minority outreach programs. Whether enrollment caps at colleges posed a barrier for applicants is unclear. In the program's first year, 516 of the nearly 2,500 eligible applicants did not use the grants. About 21 percent of the institutions in which applicants expressed interest restrict the number of out-of-state students that they will accept, although the extent to which this played a role in limiting access to these institutions is unclear. Enrollment at the University of the District of Columbia (UDC) changed little during the TAG program's first year. The TAG program and UDC appeared to serve different freshmen populations, which may account for the TAG program's minimal impact on UDC enrollment. Although concerns about TAG program administration were largely resolved with the revision of program regulations in December 2000, other administrative issues may hinder program operations, including the determination of applicant eligibility and the distribution of information on …
Date:
December 26, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
FY00 LDRD Final Report High Power IFE Driver Component Development 00-SI-009
We have begun building the ''Mercury'' laser system as the first in a series of new generation diode-pumped solid-state lasers for target physics research. Mercury will integrate three key technologies: diodes, crystals, and gas cooling, within a unique laser architecture that is scalable to kilojoule and megajoule energy levels for fusion energy applications. The primary near-term performance goals include 10% electrical efficiencies at 10 Hz and 100 J with a 2-10 ns pulse length at 1.047 {micro}m wavelength. Currently, this review concentrates on the critical development and production of Yb:S-FAP crystals. After solving many defect issues that can be present in the crystals, reproducibility is the final issue that needs to be resolved. We have enlisted the help of national experts and have strongly integrated two capable commercial crystal growth companies (Litton-Airton/Synoptics and Scientific Materials) into the effort, and have solicited the advice of Robert Morris (retired from Allied Signal), a recognized international expert in high temperature oxide growth.
Date:
February 26, 2001
Creator:
Bibeau, C.; Schaffers, K.; Tassano, J.; Waide, P. & Bayramian, A.
Object Type:
Report
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 30, No. 13, Ed. 1 Friday, January 26, 2001
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 26, 2001
Creator:
Baldwin, Alisha
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Archer County News (Archer City, Tex.), No. 30, Ed. 1 Thursday, July 26, 2001
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
July 26, 2001
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 17, Ed. 1 Thursday, April 26, 2001
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
April 26, 2001
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 242, Ed. 1 Thursday, July 26, 2001
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 26, 2001
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 120, Ed. 1 Monday, March 26, 2001
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 26, 2001
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 212, Ed. 1 Tuesday, June 26, 2001
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
June 26, 2001
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 181, Ed. 1 Saturday, May 26, 2001
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 26, 2001
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 304, Ed. 1 Wednesday, September 26, 2001
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
September 26, 2001
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 334, Ed. 1 Friday, October 26, 2001
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
October 26, 2001
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 17, Ed. 1 Friday, January 26, 2001
Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.
Date:
January 26, 2001
Creator:
Lynch, Mary Louise
Object Type:
Newspaper
System:
The Portal to Texas History