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Evapotranspiration studies for protective barriers: FY 1990 status report

Description: Pacific Northwest Laboratory (PNL) and Westinghouse Hanford Company (Westinghouse Hanford) are working together to develop for the US Department of Energy (DOE) protective barriers for the near-surface disposal of hazardous waste at the Hanford Site. The proposed barrier design consists of a layer of fine-textured soil overlying a series of layers grading from sand to basalt riprap. A multiyear research program is being conducted to assess the long-term performance of barrier configurations in … more
Date: May 1, 1992
Creator: Link, S.O.; Downs, J.L.; Thiede, M.E.; Lettau, D.J.; Twaddell, T.R. (Pacific Northwest Lab., Richland, WA (United States)) & Black, R.A. (Washington State Univ., Pullman, WA (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Degradation of cellulosic biomass and its subsequent utilization for the production of chemical feedstocks

Description: Progress in studies on the production of reducing sugars and other products by Clostridium thermocellum on cellulosic biomass is reported. The rate of reducing sugar production using corn residue was found to be equal if not greater than on solka floc. Current work is being devoted towards elucidating discrepancies between reducing sugar analysis and high pressure liquid chromatography sugar analysis in order to permit accurate material balances to be completed. Studies are reported in further … more
Date: November 1, 1977
Creator: Wang, D. I. C.; Cooney, C. L.; Demain, A. L.; Gomez, R. F. & Sinskey, A. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Biological processes for environmental control of effluent streams in the nuclear fuel cycle. [Denitrification; removal of heavy metals]

Description: Nitrates and radioactive heavy metals need to be removed from aqueous effluent streams in the fuel cycle. Biological methods are being developed for reducing nitrate or nitrite to N/sub 2/ gas and for decreasing dissolved metal concentration to less than 1 g/m/sup 3/. Fluidized-bed denitrification bioreactors are being tested. Removal of uranium from solution by Saccharomyces cerevisiae and Pseudomonas aeruginosa was studied. (DLC)
Date: January 1, 1978
Creator: Shumate, S. E., II; Hancher, C. W.; Strandberg, G. W. & Scott, C. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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(A structural assessment of the role of the cell surface carbohydrates of Rhizobium in the Rhizobium/legume symbiosis)

Description: Research continued on the study of cell surface carbohydrates of Rhizobium. Objectives include: To characterize, at a structural level, the differences between the lipopolysaccharides of a representative number of strains from different Rhizobium species to determine which features of LPS structure are species-specific and might, therefore, be determinants of host specificity. Determine the effect(s) of nod gene induction on the structure of Rhizobium lipopolysaccharides and determine whether s… more
Date: January 1, 1991
Creator: Hollingsworth, R.I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Post transcriptional regulation of chloroplast gene expression by nuclear encoded gene products

Description: The following is a review of research accomplished in the first two years of funding for the above mentioned project. The work performed is a molecular characterization of nuclear mutants of Chlamydomonas reinhardtii which are deficient in different stages in the post-transcriptional expression of a single chloroplast encoded polypeptide, the D2 protein of Photosystem II. Our long-term goals are to understand the molecular mechanisms by which nuclear gene products affect the expression of chlor… more
Date: January 1, 1992
Creator: Kuchka, Michael R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pilot plant studies of the bioconversion of cellulose and production of ethanol

Description: Progress is reported in the following studies on analysis and evaluation of potential raw materials: preliminary pretreatment studies using wheat straw; extraction of wheat straw with alcohol and water at elevated temperatures; extraction of ground wood with alcohol and water at elevated temperatures; and, delignification of newsprint with ethylene glycol. Other research in progress includes studies on: utilization of hemicellulose sugars; process design and economics of hydrolysis processes an… more
Date: June 30, 1977
Creator: Wilke, C.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electron microscopy of hydrocarbon production in parthenium argentatum (guayule)

Description: The electron microscope was used to study the biological processes involved in hydrocarbon production. The little desert shrub Guayule (Parthenium argentatum) was selected for study. This shrub can produce hydrocarbons (rubber) in concentrations up to 1/4 of its dry weight. It grows on semi-arid land and has been extensively studied. The potential of Guayule is described in detail. Results of an investigation into the morphology of Guayule at the electron microscope level are given. Experiments… more
Date: November 1, 1977
Creator: Bauer, T.E.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Characterization of a defective interfering RNA that contains a mosaic of a plant viral genome

Description: Our lab was the first to describe and characterize a defective interfering RNA (DI RNAs or DIs) in association with a small RNA plant virus. The features of the DIs that we discovered in infections of tomato bushy stunt virus were compatible with the properties of DIs identified in many animal virus infections. Animal virologists have generally recognized the importance of studying DIs because they are invaluable tools for identifying cis-acting sequences important in virus multiplication and b… more
Date: January 1, 1991
Creator: Morris, T. J. & Jackson, A. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interim report: studies of boron deposition near geothermal power plants

Description: Measurements in the Geysers area from April until October 1979 when the onset of seasonal rains limited field work are presented. Field studies involved the following three basic types of measurements: cooling tower drift deposition, plant ecological studies, and animal population studies. Brief summaries of the data are presented to demonstrate the types of information obtained. (MHR)
Date: April 21, 1980
Creator: Koranda, J.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Programmatic environmental assessment of the DOE Solar Agricultural and Industrial Process Heat Program

Description: The program's potential environmental impacts are evaluated to ensure that environmental issues are considered at the earliest meaningful point in the decision-making process. The existing environment is studied for the following: grain drying; crop drying; livestock shelter heating; food processing; textile products; lumber and wood products; paper products; chemicals; petroleum refining; stone, clay, and glass products; and primary metals industries. Environmental impacts of the proposed acti… more
Date: June 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Liquid fuels production from biomass. Progress report No. 5, July 1-September 30, 1978

Description: The current program to convert biomass into liquid hydrocarbon fuels is an extension of the previous program to ferment marine algae to acetic acid. In that study, it was found that marine algae could be converted to higher aliphatic organic acids and that these acids could be readily removed from the fermentation both by membrane or liquid-liquid extraction. It was then proposed to convert these higher organic acids to aliphatic hydrocarbons via Kolbe Electrolysis, which may be used as a diese… more
Date: January 1, 1978
Creator: Sanderson, J.E. & Wise, D.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Moisture content analysis of covered uranium mill tailings

Description: The use of vegetation and rock covers to stabilize uranium mill tailings cover systems is being investigated by Pacific Northwest Laboratory. A modeling study of moisture movement through the tailings and cover layers was initiated to determine the effect of the stabilizing techniques. The cover system was simulated under climatic conditions occurring at Grand Junction, Colorado. The cover consisted of a layer of wet clay/gravel mix followed by a capillary barrier of washed rock and a surface l… more
Date: December 1, 1981
Creator: Mayer, D. W.; Beedlow, P. A. & Cadwell, L. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Revegetation/rock cover for stabilization of inactive uranium mill tailings disposal sites

Description: Pacific Northwest Laboratory is developing design and performance guidelines for surface stabilization of inactive uranium mill tailings. In this work, vegetation and rock covers are being evaluated for maintaining long-term integrity of impoundment systems. Methods are being developed to estimate erosion rates associated with rock and/or vegetation covers, and to determine the effects of surface treatments on soil moisture. Interactions between surface treatments and barriers (radon and biolog… more
Date: July 1, 1982
Creator: Beedlow, P. A.; McShane, M. C. & Cadwell, L. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Collector sealants and breathing. Final Report, 25 September 1978-31 December 1979

Description: The objectives of this program were: (1) to investigate the pertinent properties of a variety of possible sealants for solar collectors and identify the most promising candidates, and (2) to study the effect of breathing in flat-plate, thermal solar collector units. The study involved two types of sealants, Class PS which includes preformed seals or gaskets and Class SC which includes sealing compounds or caulks. It was the intent of the study to obtain data regarding initial properties of cand… more
Date: February 20, 1980
Creator: Mendelsohn, M A; Luck, R M; Yeoman, F A & Navish, Jr, F W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Microfossils from Cerro Prieto geothermal wells, Baja California, Mexico

Description: To aid in a paleoenvironmental and age reconstruction of the Cerro Prieto reservoir system, 59 samples of well cuttings were analyzed for microfossils. The cuttings were obtained at depths from 351 to 3495 m in 14 geothermal wells in the Cerro Prieto field, Baja California, Mexico. We found foraminifera in 6 samples, ostracodes in 19 samples, and nannoplankton as coccoliths in 24 samples. Other groups, such as molluscs, insects, fish skeletal parts, and plant material were occasionally present.… more
Date: January 1, 1980
Creator: Cotton, M. L. & Vonder Haar, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proceedings of the international workshop on the effects of acid precipitation on vegetation, soils, and terrestrial ecosystems, Brookhaven National Laboratory, June 12 to 14, 1979

Description: The objectives of the workshop were to determine the levels of current knowledge of the effects of acid precipitation on vegetation, soils, and terrestrial ecosystems; research needed in these areas to understand the environmental impacts of acid rain; and to help coordinate research groups to avoid excessive duplication of research. The workshop was designed so that researchers in the areas of effects of acid precipitation on vegetation, soils, and whole ecosystem approaches could communicate … more
Date: January 1, 1979
Creator: Evans, L.S. & Hendrey, G.R. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Benthic plant communities in acidic Lake Colden, New York: Sphagnum and the algal mat

Description: Lake Colden, in the central Adirondack Mountains of New York State is botanically similar to acidified lakes in Sweden. Acidification of some Swedish lakes has been associated with an expansion of Sphagnum, primarily in shallow, sheltered littoral areas but also to depths of 18m. During a brief botanical survey on 24-25 July 1979, we observed a dense meadow of Sphagnum pylaesii around much of the shoreline of Lake Colden. Plant community composition was determined by a visual estimate of cover … more
Date: March 1, 1980
Creator: Hendrey, G R & Vertucci, J A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Biological conversion of biomass to methane. Quarterly progress report

Description: Progress in comparative studies of complete-mix and multi-stage reactors for use in the anaerobic fermentation of organic solids for methane production is reported. Results indicate that if a balanced population of organisms can be maintained in the initial stage, multi-stage fermentation is more efficient than a complete-mix system. However, if the system is stressed, failure of the multi-staged system is more rapid. When the first stage is not inhibited due to a short retention time, the wast… more
Date: January 1, 1978
Creator: Pfeffer, J T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hanford Environmental Dose Reconstruction Project Monthly Report

Description: The objective of the Hanford Environmental Dose Reconstruction Project is to estimate the radiation doses that individuals and populations could have received from nuclear operations at Hanford since 1944. The project is being managed and conducted by the Pacific Northwest Laboratory (PNL) under the direction of an independent Technical Steering Panel (TSP). The project is divided into the following technical tasks. These tasks correspond to the path radionuclides followed, from release to impa… more
Date: July 1, 1991
Creator: Finch, S.M. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Gene conversion in yeast as a function of linear energy transfer (LET) for low-LET radiation

Description: The relative biological effectiveness (RBE) for low-LET radiation is known to depend on such factors as LET and dose rate. Microdosimetric calculations indicate that the biological target size could also be an important parameter, and calculations predict that the RBE for effects produced by hits in target sizes below about 100 nm should be unity for all low LET radiation. We have measured that RBE for gene conversion in yeast (a small target) for five different low LET photon sources, and the … more
Date: May 1, 1992
Creator: Unrau, P.; Morrison, D.P. (Pacific Northwest Lab., Richland, WA (United States)) & Johnson, J.R. (Atomic Energy of Canada Ltd., Chalk River, ON (Canada). Chalk River Nuclear Labs.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Division of Energy Biosciences annual report and summaries of FY 1991 activities

Description: As a component of the Department of Energy, the Energy Biosciences (EB) program of the Office of Basic Energy Sciences supports long-term research aimed at addressing energy-related problems utilizing biological systems. There are three main components of the EB program. The first, Primary Biological Energy Conversion, concentrates on research on plant and microbial photosynthesis, but also deals with plant growth control, stress reactions, and interaction with pathogens. The second, Bioconvers… more
Date: September 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation on the utilization of coal fly ash as amendment to compost for vegetation in acid soil

Description: Application of fly ash-amended composts as manure enhances the crop yield of certain plants like corn, sorghum, collard and mustard greens. Organic compost made out of grass and leaves (home-made) is better than the commercial composts for amendment with fly ash. A 20--40% fly ash in the amended compost and a soil to ash-amended compost ratio of 3:1 are recommended for making bed for plantation. Organic compost mixed with fly ash, due to reduced porosity, will help the bed to retain water and c… more
Date: August 1, 1991
Creator: Menon, M.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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