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Visualization of Excitonic Structure in the Fenna-Matthews-OlsonPhotosynthetic Complex by Polarization-Dependent Two-DimensionalElectronic Spectroscopy

Description: Photosynthetic light-harvesting proceeds by the collection and highly efficient transfer of energy through a network of pigment-protein complexes. Inter-chromophore electronic couplings and interactions between pigments and the surrounding protein determine energy levels of excitonic states and dictate the mechanism of energy flow. The excitonic structure (orientation of excitonic transition dipoles) of pigment-protein complexes is generally deduced indirectly from x-ray crystallography in comb… more
Date: May 26, 2008
Creator: Department of Chemistry, The University of Chicago; Department of Biology, Department of Chemistry, Washington University; Fleming, Graham; Read, Elizabeth L.; Schlau-Cohen, Gabriela S.; Engel, Gregory S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[Tools for determining health of phytoplankton cells]

Description: The primary purpose of the proposed research is to develop molecular tools for determining the health of marine phytoplankton on an individual cell basis. Since the definition of healthy in phytoplankton cells is elusive, we propose to develop markers for several different metabolic processes indicative of physiological state: photosynthetic activity, esterase activity, membrane permeability, and mitochondrial activity. One underlying motivation is to develop methods which will allow us to eval… more
Date: December 31, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Water potential and starvation stress in deep subsurface microorganisms

Description: Nine intact core samples, collected aseptically from depths of 10--436 m near the Savannah River Plant in South Carolina, were tested for water potential, microbial numbers, and microbial activity. Although all samples were collected from below the water table, two samples (a Pee Dee clay from 238 m and a Middendorf clay from 324 m) showed unsaturated conditions ({minus}2.7 and {minus}2.1 MPa, respectively). Both of these samples had very low numbers of culturable cells, low microbial biomass (… more
Date: December 31, 1990
Creator: Kieft, Thomas L.; Rosacker, Laurie L.; Willcox, David & Franklin, Abraham J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Water Potential and Starvation Stress in Deep Subsurface Microorganisms

Description: Nine intact core samples, collected aseptically from depths of 10--436 m near the Savannah River Plant in South Carolina, were tested for water potential, microbial numbers, and microbial activity. Although all samples were collected from below the water table, two samples (a Pee Dee clay from 238 m and a Middendorf clay from 324 m) showed unsaturated conditions ({minus}2.7 and {minus}2.1 MPa, respectively). Both of these samples had very low numbers of culturable cells, low microbial biomass (… more
Date: January 1, 1990
Creator: Kieft, Thomas L.; Rosacker, Laurie L.; Willcox, David & Franklin, Abraham J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Environmental Parameters Controlling Microbial Activities in Terrestrial Subsurface Environments. Technical Completion Report.

Description: This project was begun in July 1988 as part of Phase I of the Deep Microbiology Subprogram. At this time, the Subprogram was preparing for sampling near the Savannah River Site (SRS) from what was being termed the ``Investigator`s Hole.`` This was the fourth hole drilled for sampling in the coastal plain sediments at a site near the SRS. Since there was a possibility of sampling from the saline Triassic basin in the deeper regions in this fourth hole, there was particular interest in quantifyin… more
Date: December 31, 1990
Creator: Kieft, Thomas L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental Parameters Controlling Microbial Activities in Terrestrial Subsurface Environments

Description: This project was begun in July 1988 as part of Phase I of the Deep Microbiology Subprogram. At this time, the Subprogram was preparing for sampling near the Savannah River Site (SRS) from what was being termed the Investigator's Hole.'' This was the fourth hole drilled for sampling in the coastal plain sediments at a site near the SRS. Since there was a possibility of sampling from the saline Triassic basin in the deeper regions in this fourth hole, there was particular interest in quantifying … more
Date: January 1, 1990
Creator: Kieft, Thomas L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Phytoplankton excretion revisited: Healthy cells may not do it, but how many cells are healthy?. Continuation progress report, May 1, 1993--April 30, 1994

Description: The primary purpose of the proposed research is to develop molecular tools for determining the health of marine phytoplankton on an individual cell basis. Since the definition of {open_quotes}healthy{close_quotes} in phytoplankton cells is elusive, we propose to develop markers for several different metabolic processes indicative of physiological state: photosynthetic activity, esterase activity, membrane permeability, and mitochondrial activity. One underlying motivation is to develop methods … more
Date: May 1, 1994
Creator: Wood, A. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Tools for determining health of phytoplankton cells]

Description: The primary purpose of the proposed research is to develop molecular tools for determining the health of marine phytoplankton on an individual cell basis. Since the definition of healthy in phytoplankton cells is elusive, we propose to develop markers for several different metabolic processes indicative of physiological state: photosynthetic activity, esterase activity, membrane permeability, and mitochondrial activity. One underlying motivation is to develop methods which will allow us to eval… more
Date: January 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quarterly Progress Report (April 1 to June 30, 1950)

Description: This is the second of a series of Quarterly Progress Reports. While most of the departments have summarized their work or used a form comparable to abstracts, the Chemistry Department has given both abstracts and complete reports on its work. The major part of the progress in the Reactor Science and Engineering Department is being presented simultaneously in a separate classified report. There are reports from the following departments: (1) physics department; (2) instrumentation and health phy… more
Date: July 1, 1950
Creator: Laboratory, Brookhaven National
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Microbial dissolution of silicate materials. Final report

Description: The objective of this research was to better understand the role of selected thermophilic bacteria in the colonization and dissolution of silicate minerals, with potential applications to the HDR Project. The demonstration of enhanced dissolution from microbial effects is critically dependent on providing a mineral bait within a media deficient in the critical nutrient found in the mineral (e.g., Fe). Reproducible experimental conditions in batch experiments require agitation to expose mineral … more
Date: March 26, 1996
Creator: Schwartzman, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Over production of lignocellulosic enzymes of Coriolus versicolor by genetic engineering methodology. Final report

Description: The project seeks to understand the biological and chemical processes involved in the secretion of the enzyme polyphenol oxidase (PPO) by the hyphae, the basic unit of the filamentous fungus Coriolus versicolor. These studies are made to determine rational strategies for enhanced secretion of PPO, both with the use of recombinant DNA techniques and without. This effort focuses on recombinant DNA techniques to enhance enzyme production. The major thrust of this project was two-fold: to mass prod… more
Date: July 1, 1998
Creator: Williams, A. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Primary production and biovolume of chroococcoid cyanobacteria in relation to other phytoplankton in southeastern US lakes

Description: Primary production rates and algal biovolumes were measured for various size classes of phytoplankton in three South Carolina lakes. Size classes of less than 3 ..mu..m accounted for 15 to 40% of the total primary production but only represented less than 5% of the total algal biovolume. Fluorescence microscopic analyses and laboratory culturing experiments indicated that chroococcoid cyanobacteria (unicellular blue-green algae) were primarily responsible for the relatively high primary product… more
Date: January 1, 1979
Creator: Tison, D. L. & Wilde, E. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ecological distribution of Legionella pneumophila

Description: Bacteria were concentrated 500-fold from 20-liter water samples collected from 67 different lakes and rivers in the United States. The data suggest that Legionella pneumophila is part of the natural aquatic environment, and that the bacterium is capable of surviving extreme ranges of environmental conditions. The data further demonstrate the effectiveness of the direct fluorescent antibody technique for detecting L. pneumophila in natural aquatic systems. Smears of the concentrated samples were… more
Date: January 1, 1980
Creator: Fliermans, C. B.; Cherry, W. B.; Orrison, L. H.; Smith, S. J.; Tison, D. L. & Pope, D. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Lake Roosevelt Fisheries and Limnological Research : 1996 Annual Report.

Description: The Lake Roosevelt Monitoring/Data Collection Program resulted from a merger between the Lake Roosevelt Monitoring Program and the Lake Roosevelt Data Collection Project. This project will model biological responses to reservoir operations, evaluate the effects of releasing hatchery origin kokanee salmon and rainbow trout on the fishery, and evaluate the success of various stocking strategies. In 1996, limnological, reservoir operation, zooplankton, and tagging data were collected. Mean reservo… more
Date: May 1997
Creator: Cichosz, Thomas A.; Underwood, Keith D.; Shields, John; Scholz, Allan & Tilson, Mary Beth
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Temporary Restoration of Bull Trout Passage at Albeni Falls Dam

Description: This study was designed to monitor movements of bull trout that were provided passage above Albeni Falls Dam, Pend Oreille River. Electrofishing and angling were used to collect bull trout below the dam. Tissue samples were collected from each bull trout and sent to the U. S. Fish and Wildlife Service Abernathy Fish Technology Center Conservation Genetics Lab, Washington. The DNA extracted from tissue samples were compared to a catalog of bull trout population DNA from the Priest River drainage… more
Date: July 13, 2009
Creator: Paluch, Mark; Scholz, Allan; McLellan, Holly & Olson, Jason
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fisheries Habitat Evaluation on Tributaries of the Coeur d`Alene Indian Reservation : Annual Report [1991].

Description: The purpose of this study was to conduct physical and biological surveys of streams located on the Coeur d'Alene Indian Reservation. Surveys were designed to collect information on improving spawning habitat, rearing habitat, and access to spawning tributaries for bull trout and cutthroat trout and to evaluate the existing fish stocks. The objectives of the second year of the study were to: (1) Develop a stream ranking system to select the five streams of primary fisheries potential; (2) Conduc… more
Date: February 1, 1993
Creator: Woodward-Lillengreen, Kelly L.; Johnson, D. Chad & Scholz, Allan T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plant training grant: DE-FG02-94ER20162. Final technical report

Description: The aim of this training grant was to educate students of Plant Science in the disciplines of Biochemistry and Chemistry, in addition to the more traditional courses in Plant Biology. Annual retreats were held which involved a day-long meeting and included lectures from Penn faculty as well as famous national and international scientists. Programs for two of these retreats are included. In addition to lecture courses, students performed research within the Departments of Biology, Chemistry, and… more
Date: February 1, 2003
Creator: Cashmore, Anthony R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The fifth international conference on Arabidopsis research

Description: This volume contains abstracts of oral and poster presentations made in conjunction with the Fifth International Conference on Arabidopsis Research held August 19--22, 1993 at the Ohio State University, Columbus, Ohio.
Date: December 31, 1993
Creator: Hangarter, R.; Scholl, R.; Davis, K. & Feldmann, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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