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The bioenergetics of salt tolerance

Description: The aim of this project was to try to understand the adaptive mechanisms that organisms develop in order to respond to a sudden transformation in their environment to a salt shock.'' To study this problem we used a fresh water oxygenic photosynthetic cyanobacterium known as Synecoccus 6311. This organism suffers injury after this sudden exposure to high concentrations of sodium chloride equivalent to or even higher than that in sea water. Yet they are able to re-establish their photosynthetic a… more
Date: January 1, 1991
Creator: Packer, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Temporal and spatial trends in the chemistry of acidified lakes under ice cover

Description: When preparing materials budgets for watersheds containing lakes, the spatial and temporal interchange between large compartments within the whole system must be considered. This paper addresses the lakes of the Integrated Lake-Watershed Acidification Study (ILWAS) and their role in our mass balance calculations for the period of winter stratification of 1978-1979, and presents data on lake metabolism.
Date: March 1, 1980
Creator: Hendrey, G. R.; Galloway, J. N. & Schofield, C. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Barium in Twilight Zone suspended matter as a potential proxy for particulate organic carbon remineralization: Results for the North Pacific

Description: This study focuses on the fate of exported organic carbon in the twilight zone at two contrasting environments in the North Pacific: the oligotrophic ALOHA site (22 degrees 45 minutes N 158 degrees W; Hawaii; studied during June-July 2004) and the mesotrophic Subarctic Pacific K2 site (47 degrees N, 161 degrees W; studied during July-August 2005). Earlier work has shown that non-lithogenic, excess particulate Ba (Ba{sub xs}) in the mesopelagic water column is a potential proxy of organic carbon… more
Date: April 10, 2008
Creator: Dehairs, F.; Jacquet, S.; Savoye, N.; Van Mooy, B. A. S.; Buesseler, K.; Bishop, J. K. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Carbon Sequestration on Surface Mine Lands

Description: The first quarter of 2004 was dedicated to tree planting activities in two locations in Kentucky. During the first year of this project there was not available mine land to plant in the Hazard area, so 107 acres were planted in the Martin County mine location. This year 120 acres were planted in the Hazard area to compensate for the prior year and an additional 57 acres were planted on Peabody properties in western Kentucky. Additional sets of special plots were established on each of these are… more
Date: November 30, 2004
Creator: Graves, Donald H.; Barton, Christopher; Koo, Bon Jun; Sweigard, Richard & Warner, Richard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Breathing Orbital Valence Bond Method in Diffusion Monte Carlo: C-H Bond Dissociation ofAcetylene

Description: This study explores the use of breathing orbital valence bond (BOVB) trial wave functions for diffusion Monte Carlo (DMC). The approach is applied to the computation of the carbon-hydrogen (C-H) bond dissociation energy (BDE) of acetylene. DMC with BOVB trial wave functions yields a C-H BDE of 132.4 {+-} 0.9 kcal/mol, which is in excellent accord with the recommended experimental value of 132.8 {+-} 0.7 kcal/mol. These values are to be compared with DMC results obtained with single determinant … more
Date: May 30, 2008
Creator: Domin, D.; Braida, Benoit & Lester Jr., William A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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PERSPECTIVES ON A DOE CONSEQUENCE INPUTS FOR ACCIDENT ANALYSIS APPLICATIONS

Description: Department of Energy (DOE) accident analysis for establishing the required control sets for nuclear facility safety applies a series of simplifying, reasonably conservative assumptions regarding inputs and methodologies for quantifying dose consequences. Most of the analytical practices are conservative, have a technical basis, and are based on regulatory precedent. However, others are judgmental and based on older understanding of phenomenology. The latter type of practices can be found in mod… more
Date: July 30, 2008
Creator: O'Kula, Kevin R.; Lowrie, Jonathan; Thoman, David C. & Keller, Austin
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Biostimulation of Iron Reduction and Uranium Immobilization: Microbial and Mineralogical Controls

Description: This project represented a joint effort between Florida State University (FSU), Rutgers University (RU), and the University of Illinois (U of I). FSU served as the lead institution and Dr. J.E. Kostka was responsible for project coordination, integration, and deliverables. This project was designed to elucidate the microbial ecology and geochemistry of metal reduction in subsurface environments at the U.S. DOE-NABIR Field Research Center at Oak Ridge, Tennessee (ORFRC). Our objectives were to: … more
Date: February 6, 2008
Creator: Kostka, Joel E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Surface CO2 leakage during the first shallow subsurface CO2release experiment

Description: A new field facility was used to study CO2 migrationprocesses and test techniques to detect and quantify potential CO2leakage from geologic storage sites. For 10 days starting 9 July 2007,and for seven days starting 5 August 2007, 0.1 and 0.3 t CO2 d-1,respectively, were released from a ~;100-m long, sub-water table (~;2.5-mdepth) horizontal well. The spatio-temporal evolution of leakage wasmapped through repeated grid measurements of soil CO2 flux (FCO2). Thesurface leakage onset, approach to … more
Date: September 15, 2007
Creator: Lewicki, J. L.; Oldenburg, C.; Dobeck, L. & Spangler, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Interannual Variability in Global Soil Respiration on a 0.5 Degree Grid Cell Basis (1980-1994)

Description: We used a climate-driven regression model to develop spatially resolved estimates of soil-CO{sub 2} emissions from the terrestrial land surface for each month from January 1980 to December 1994, to evaluate the effects of interannual variations in climate on global soil-to-atmosphere CO{sub 2} fluxes. The mean annual global soil-CO{sub 2} flux over this 15-y period was estimated to be 80.4 (range 79.3-81.8) Pg C. Monthly variations in global soil-CO{sub 2} emissions followed closely the mean te… more
Date: September 15, 2003
Creator: Raich, J.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SPECTROSCOPIC INVESTIGATION OF THE INHIBITORY EFFECT OF FATTYACIDS ON PHOTOSYNTHETIC SYSTEMS

Description: Fatty acids have a reversible inhibitory effect on respiration and on photosynthetic action. They investigated the influence of octanoic acid on the photosynthetic bacteria Rhodopseudomonas spheroids R-26. From the spectroscopic data they conclude that a less efficient energy transfer and decoupling of the light harvesting pigment system from the energy converting reaction center is responsible for the inhibitory effect.
Date: May 1, 1971
Creator: Steffea, Hans & Calvin, Melvin.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effects of organic carbon supply rates on mobility of previously bioreduced uranium in a contaminated sediment

Description: Bioreduction-based strategies for remediating uranium (U)-contaminated sediments face the challenge of maintaining the reduced status of U for long times. Because groundwater influxes continuously bring in oxidizing terminal electron acceptors (O{sub 2}, NO{sub 3}{sup -}), it is necessary to continue supplying organic carbon (OC) to maintain the reducing environment after U bioreduction is achieved. We tested the influence of OC supply rates on mobility of previously microbial reduced uranium U… more
Date: May 15, 2008
Creator: Wan, J.; Tokunaga, T.K.; Kim, Y.; Brodie, E.; Daly, R.; Hazen, T.C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tritium Room Air Monitor Operating Experience Review

Description: Monitoring the breathing air in tritium facility rooms for airborne tritium is a radiological safety requirement and a best practice for personnel safety. Besides audible alarms for room evacuation, these monitors often send signals for process shutdown, ventilation isolation, and cleanup system actuation to mitigate releases and prevent tritium spread to the environment. Therefore, these monitors are important not only to personnel safety but also to public safety and environmental protection.… more
Date: September 1, 2008
Creator: Cadwallader, L. C. & Denny, B. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Spatial and temporal patterns of root distribution in developing stands of four woody crop species grown with drip irrigation and fertilization.

Description: Abstract In forest trees, roots mediate such significant carbon fluxes as primary production and soil C02 efflux. Despite the central role of roots in these critical processes, information on root distribution during stand establishment is limited, yet must be described to accurately predict how various forest types, which are growing with a range of resource limitations, might respond to environmental change. This study reports root length density and biomass development in young stands of eas… more
Date: September 1, 2007
Creator: Coleman, Mark
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Shewanella Federation: Functional Genomic Investigations of Dissimilatory Metal-Reducing Shewanella

Description: Generation and validation of a Shewanella oneidensis MR-1 clone set for protein expression and phage display. An ORF clone set for S. oneidensis was created using the lambda recombinase system. ORFs within entry vectors in this system can be readily transferred into multiple destination vectors, making the clone set a useful resource for research groups studying this microorganism. To establish that the S. oneidensis clone set could be used for protein expression and functional studies, three s… more
Date: January 30, 2009
Creator: Zhou, Jizhong & He, Zhili
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Models for pulmonary lethality and morbidity after irradiation from internal and external sources

Description: This report provides a hazard-function model for estimating the risk of death from radiation pneumonitis and/or pulmonary fibrosis following a light-water nuclear power accident. A similar model is also provided for estimating the prevalence of respiratory functional morbidity among those that survive death from acute effects. Hazard-function models for lethality and for morbidity were constructed using the cumulative hazard estimator H, which is related to the risk estimator R through the equa… more
Date: May 1, 1989
Creator: Scott, B. R.; Filipy, R. E. & Hahn, E. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Flux and Recovery of Bioactive Substances in the Surface Sediments of Deep Basins Off Southern California

Description: Sediment microbial community biomass and activity in Santa Monica Basin, a nearshore basin in the California Continental Borderland, were examined in October 1985, 1986 and 1987, May 1986, April 1987 and January 1990. Millimeter-scale ATP profiles and incubation of intact cores with {sup 3}H-adenine indicated a high-biomass interface microbial population in the low-oxygen central basin, which was absent in samples from the basin slope sediments. A majority of microbial activity and organic matt… more
Date: June 11, 1990
Creator: Jahnke, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy and technology review

Description: Research programs at Lawrence Livermore Laboratories are described. These include: the generation of intense electron beams for military applications; SYNROC, a permanent means of radioactive-waste storage in synthetic rock compounds; and studies of respiration using a positron camera with radioisotopes produced in the 100-MeV electron linear accelerator. (GHT)
Date: December 1, 1981
Creator: Stowers, I. F.; Crawford, R. B.; Esser, M. A. & Neal, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of a national interregional transport matrix for respirable particulates

Description: The Pacific Northwest Laboratory (PNL) long-range transport model was used to produce monthly, average air concentrations of respirable particulates produced by 86 unit emission sources located at points on a grid spanning the continental United States. These monthly assessments were interpolated to provide monthly, average air concentrations resulting from a unit source located at the centroid of each of 238 Air Quality Control Regions (AQCR). The air concentration field from each emitter AQCR… more
Date: October 1, 1979
Creator: Eadie, W. J. & Davis, W. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling the response of plants and ecosystems to elevated CO sub 2 and climate change

Description: While the exact effects of elevated CO{sub 2} on global climate are unknown, there is a growing consensus among climate modelers that global temperature and precipitation will increase, but that these changes will be non-uniform over the Earth's surface. In addition to these potential climatic changes, CO{sub 2} also directly affects plants via photosynthesis, respiration, and stomatal closure. Global climate change, in concert with these direct effects of CO{sub 2} on plants, could have a sign… more
Date: March 1, 1992
Creator: Reynolds, J. F.; Hilbert, D. W.; Chen, Jia-lin; Harley, P. C.; Kemp, P. R. & Leadley, P. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Aerosol sampling and characterization for hazard evaluation. Progress report, October 1, 1977-September 30, 1978. [/sup 239/Pu aerosol monitor performance in work area]

Description: Measurements of the dilution of air contaminants between worker breathing zone and area air samplers were made by releasing a test fluorescent aerosol in workrooms equipped with aerosol surveillance systems. These data were used to evaluate performance and suggest improvements in design of alarming air monitor systems. In one workroom studied, average half-hour breathing zone air concentration needed to trigger alarm was found to be 960 times the maximum permissible air concentration for occupa… more
Date: November 1, 1979
Creator: Scripsick, R.C.; Tillery, M.I.; Stafford, R.G. & Romero, P.O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Co[sub 2] exchange, environmental productivity indices, and productivity of opuntia ficus-indica under current and elevated CO[sub 2] concentrations

Description: This project involved placing mature cladodes (flattened stem segments) of Opuntia ficus-indica in growth chambers containing 360 or 720 ppM CO[sub 2]. After nine weeks, the new daughter cladodes initiated on the planted cladodes averaged 7% higher in biomass but 8% less is area, leading to a specific stem mass for this Crassulacean acid metabolism (CAM) species that was 16% higher under the elevated CO[sub 2] condition. This is similar to be less dramatic than the increase in specific leaf mas… more
Date: January 1, 1992
Creator: Nobel, P.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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