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Isolation of pathogenic Naegleria from artificially heated waters

Description: Investigations were undertaken to determine whether heated waters facilitate the proliferation of free-living amoeba that cause primary amoebic meningoencephalitis. Water samples were taken close to the discharges of power plants situated on lakes or rivers in Florida and Texas and from cooling towers in Tennessee. The water temperatures ranged from 29 to 42/sup 0/C. Water samples were also taken from several lakes in Florida and Texas without associated power plants. The water temperatures of … more
Date: January 1, 1977
Creator: Tyndall, R L; Willaert, E; Stevens, A R & Coutant, C C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

F/H Area ETF effluent (H-016 outfall), ceriodaphnia survival/reproduction test, test date: March 21, 1991

Description: This toxicity test was conducted to determine if the effluent from the F/H area at Savannah River Plant affects the survival or reproduction of the test organisms during a seven day period. The test involved exposing the test organisms to a series of dilutions of the effluent. At each dilution the survival and reproduction of ten test organisms was recorded. Each effluent dilution was compared to a control set of test organisms. Survival data were analyzed by Fisher's Exact Test and the Trimmed… more
Date: August 1, 1991
Creator: Specht, Winona L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Americium and plutonium in water, biota, and sediment from the central Oregon coast

Description: Plutonium-239, 240 and americium-241 were measured in the mussel Mytilus californianus from the region of Coos Bay, OR. The flesh of this species has a plutonium concentration of about 90 fCi/kg, and an Am-241/Pu-239, 240 ratio that is high relative to mixed fallout, ranging between two and three. Transuranic concentrations in sediment, unfiltered water, and filterable particulates were also measured; none of these materials has an Am/Pu ratio as greatly elevated as the mussels, and there is no… more
Date: June 1, 1982
Creator: Nielsen, R. D.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Effects of Prudhoe Bay crude oil in sediment on Abarenicola pacifica in laboratory and field experiments

Description: Behavioral responses of organisms are often sensitive indicators of changes in the environment over short time frames. The rate of burrowing of Abarenicola pacifica, a lugworm typical of muddy tidal flats, was studied to determine its response to the presence of hydrocarbons in the environment. If a reduction in burrowing rates is reflected in reduced food intake, a decline in nutritional status might be expected. The level of free amino acids in the tissues was examined as a possible indicator… more
Date: February 1, 1980
Creator: Augenfeld, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microscopy and Elemental Analysis in Tissue Samples Using Computed Microtomography With Synchrotron X-Rays

Description: The initial development shows that CMT using synchrotron x-rays can be developed to ..mu..m spatial resolution and perhaps even better. This creates a new microscopy technique which is of special interest in morphological studies of tissues, since no chemical preparation or slicing of the sample is necessary. The combination of CMT with spatial resolution in the ..mu..m range and elemental mapping with sensitivity in the ppM range results in a new tool for elemental mapping at the cellular leve… more
Date: January 1, 1988
Creator: Spanne, P. & Rivers, M. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Darkling beetle populations (Tenebrionidae) of the Hanford site in southcentral Washington

Description: This 3-yr study documents the taxonomic composition, relative abundance, and seasonal distribution of darkling beetles occupying the Hanford Site in southcentral Washington. A taxonomic key and species diagnosis are provided to assist in identification by the nonspecialist. Analysis of food plant availability and selection serves to identify transfer pathways through beetle populations and permits construction of food web diagrams depicting the flow of materials through the darkling beetle comp… more
Date: February 1, 1978
Creator: Rogers, L. E.; Woodley, N.; Sheldon, J. K. & Uresk, V. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Neutron-induced mutation experiments. Progress report, March 1, 1977--February 28, 1978. [Drosophila female gonial cell exposure]

Description: Experiments have been carried out to study the relative mutagenic effectiveness for Drosophila female germ cells of neutrons of different energies employing X-linked recessive lethal and specific locus mutation tests. The energies and doses employed to date to study X-linked lethals are 0.43 MeV (500, 1000, 1500, 1900 R (in progress)), 0.68 MeV (250, 500, 1000, 1500 R), 2 MeV (250, 500, 1000, 1500, 2000 R), 6 MeV (250, 500, 1500, 3000 R) and 15 MeV (250, 500, 1000, 1500, 3000 R). 0.43-MeV neutr… more
Date: November 1, 1977
Creator: Abrahamson, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

F/H Area ETF effluent (H-016 outfall) ceriodaphnia survival/reproduction test, test date: December 28, 1989

Description: This toxicity test was conducted to determine if the effluent from the H/F area of Savannah River Plant affect the survival or reproduction of the test organisms during a seven day period. The test involved exposing the test organisms to a series of dilutions of the effluent. At each dilution the survival and reproduction of ten test organisms was recorded. Each effluent dilution was compared to a control set of test organisms. Survival data were analyzed by Fisher's Exact Test and Probit Analy… more
Date: August 1, 1991
Creator: Specht, Winona L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Response of the Asiatic clam, Corbicula manilensis, to gamma radiation

Description: When heat exchangers for reactors were plugged by the Asiatic clam, acute gamma radiation was considered as a possible control. Clams were collected and sorted by size; during irradiation the clams were submerged in natural water. Clams of both sizes survived large doses with no radiation damage evident in 30 days. Mortality rose steeply at doses of 2.4 x 10/sup 4/ Rad and above; smaller clams showed a greater resistance than large ones. The feasibility of using periodic exposure to gamma radia… more
Date: January 1, 1977
Creator: Tilly, L. J.; Corey, J. C. & Bibler, N. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Oak Ridge Gaseous Diffusion Plant Biological Monitoring and Abatement Program for Mitchell Branch

Description: A proposed Biological Monitoring and Abatement Program (BMAP) for the Oak Ridge Gaseous Diffusion Plant (ORGDP; currently the Oak Ridge K-25 Site) was prepared in December 1986, as required by the modified National Pollutant Discharge Elimination System (NPDES) permit that was issued on September 11, 1986. The effluent discharges to Mitchell Branch are complex, consisting of trace elements, organic chemicals, and radionuclides in addition to various conventional pollutants. Moreover, the compos… more
Date: January 1, 1992
Creator: Loar, J. M.; Adams, S. M.; Kszos, L. A.; Ryon, M. G.; Smith, J. G.; Southworth, G. R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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F/H Area ETF effluent (H-016 outfall) ceriodaphnia survival/reproduction test, test date: September 21, 1989

Description: This toxicity test was conducted to determine if the effluent from the F/H area of Savannah River Plant causes death (acute toxicity) or reduction in the reproduction of the test organisms (chronic toxicity) during a seven day period. A series of dilutions of the effluent are set to determine how much the effluent must be diluted before toxic effects are no longer noted. Acute toxicity is checked by statistically analyzing whether significantly more organisms die in the effluent dilutions than … more
Date: August 1, 1991
Creator: Specht, Winona L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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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Investigating the impact of drilling mud and its major components on bivalve species of Georges bank. Progress report No. 2, February 28, 1979-November 1, 1979

Description: Results described in progress report No. 1 indicate that 0.3-1.0 grams of drilling mud/liter of seawater can stress bivalve molluscs and that metallic components of drilling muds are assimilated by these organisms. The results posed questions about the short- and long-term effects of stress on energy stores, reproduction, and metal assimilation; accordingly, this year's research program has focused on these three areas and on a continued chemical characterization of the drilling muds used.
Date: November 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mercury-binding proteins of Mytilus edulis

Description: Mytilus edulis possesses low molecular weight, mercury-binding proteins. The predominant protein isolated from gill tissue is enriched in cysteinyl residues (8%) and possesses an amino acid composition similar to cadmium-binding proteins of mussels and oysters. Continuous exposure of mussels to 5 ..mu..g/l mercury results in spillover of mercury from these proteins to high molecular weight proteins. Antibodies to these proteins have been isolated, and development of immunoassays is presently un… more
Date: November 1, 1981
Creator: Roesijadi, G.; Morris, J.E. & Calabrese, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Genetic effects of low x-ray doses. Progress report, October 1, 1976--September 30, 1977. [In Drosophila]

Description: A linear-quadratic model of dose-kinetics is proposed for x-ray induced recessive lethal mutations in oogonia of Drosophila. From this it should follow that at higher total doses fractionation treatments should give a lower yield of mutations than an equivalent acute exposure. A dose of 6000 R, given acutely and in 3 different fractionation regimes gave results in the expected direction for 2 x 3000 R, and a significant decrease for 3 x 2000 R and for 4 x 1500 R fractionations.
Date: September 1, 1977
Creator: Abrahamson, S. & Meyer, H.U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Interactions of Corbicula sp. with power plants. [Power plant condenser fouling by clams, use of waste heat for control of fouling by clams, and use of thermal effluents in clam aquaculture]

Description: There are three perspectives with which to view the interaction of Corbicula and power plants: as a fouling agent; as an important part of the natural ecosystem; and as a potential species for use in waste heat aquaculture. The first two of these interactions are essentially negative in character, since they involve avoidance of impacts either of Corbicula on power plant operation or of power plant operation on Corbicula. Condenser fouling by these claims has been controlled by mechanical means… more
Date: January 1, 1977
Creator: Mattice, J. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Short term variation in the vertical distribution of copepods off the coast of northern Peru

Description: Vertical profiles of chlorophyll a, oxygen, density and copepods were collected during November 1977 near 9/sup 0/S off Peru. The majority of three groups of copepod, the Oncaeidae, the Oithonidae and small calanoids, remained above the depth (approx. 30m) where concentrations of oxygen became less than 0.5 ml.l/sup -1/ both day and night. Centers of population of all three groups were in or below the pycnocline at all times. In daytime all three groups accumulated at depth, while at night all … more
Date: April 1, 1980
Creator: Smith, S. L.; Boyd, C. M. & Lane, P. V. Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Molecular mechanisms of mutagenesis determined by the recombinant DNA technology

Description: A study of the alteration of the DNA in the mutant gene can determine mechanisms of mutation by distinguishing between mutations induced by transition, transversion, frameshifts of a single base and deletions involving many base pairs. The association of a specific pattern of response with a mutagen will permit detecting mutants induced by the mutagen with a reduced background by removing mutations induced by other mechanisms from the pool of potential mutants. From analyses of studies that hav… more
Date: January 1, 1985
Creator: Lee, W.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fractionally distilled SRC-I, SRC-II, EDS, H-Coal and ITSL direct coal liquefaction process materials: a comparative summary of chemical analysis and biological testing

Description: This document reports and compares the results compiled from chemical analyses and biological testing of coal liquefaction process materials which were fractionally distilled, after production, into various comparable boiling-point range cuts. Comparative analyses were performed on solvent refined coal (SRC)-I, SRC-II, H-Coal, EDS an integrated two-stage liquefaction (ITSL) distillate materials. Mutagenicity and carcinogenicity assays were conducted in conjunction with chromatographic and mass … more
Date: July 1, 1985
Creator: Wright, C. W.; Later, D. W.; Dauble, D. D. & Wilson, B. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comprehensive progress report, 1977-1980

Description: Research accomplishments and activities during the past three year period are described. Specific projects were: (1) restriction endonuclease studies of tetrahymena mtDNA; (2) biosynthesis of mitochondrial tRNA; and (3) structure and synthesis of tRNA charging enzymes. (ACR)
Date: January 1, 1980
Creator: Suyama, Y
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

F/H Area for ETF effluent (H-016 outfall), ceriodaphnia survival/reproduction test, test date: June 27, 1991

Description: This toxicity test was conducted to determine if the effluent from the F/H area at Savannah River Plant affects the survival or reproduction of the test organisms during a seven day period. The test involved exposing the test organisms to a series of dilutions of the effluent. At each dilution the survival and reproduction of ten tests organisms was recorded. Each effluent dilution was compared to a control set of test organisms. Survival data were analyzed by Fisher's Exact Test and Probit Ana… more
Date: January 1, 1991
Creator: Specht, Winona L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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