Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16741
Mineral resource assessment; Custer and Gallatin national forests, Montana Mineral resource assessment; Custer and Gallatin national forests, Montana
No abstract available.
Authors
Jane Marie Hammarstrom, Anna B. Wilson, Bradley S. Van Gosen, Robert R. Carlson, Dolores M. Kulik, Gregory K. Lee, James E. Elliott, William J. Perry, Edward A. du Bray, Michael L. Zientek
Characterizing a ground water basin in a New England mountain and valley terrain Characterizing a ground water basin in a New England mountain and valley terrain
A ground water basin is defined as the volume of subsurface through which ground water flows from the water table to a specified discharge location. Delineating the topographically defined surface water basin and extending it vertically downward does not always define the ground water basin. Instead, a ground water basin is more appropriately delineated by tracking ground water flowpaths...
Authors
Claire R. Tiedeman, Daniel J. Goode, Paul A. Hsieh
Nonlinear refraction and reflection travel time tomography Nonlinear refraction and reflection travel time tomography
We develop a rapid nonlinear travel time tomography method that simultaneously inverts refraction and reflection travel times on a regular velocity grid. For travel time and ray path calculations, we apply a wave front method employing graph theory. The first-arrival refraction travel times are calculated on the basis of cell velocities, and the later refraction and reflection travel...
Authors
Jiahua Zhang, Uri S. ten Brink, M.N. Toksoz
Gene conservation: management and evolutionary units freshwater bivalve management-introduction to the proceedings Gene conservation: management and evolutionary units freshwater bivalve management-introduction to the proceedings
No abstract available.
Authors
T.L. King, E.C. Pendleton, R.F. Villella
A female black bear denning habitat model using a geographic information system A female black bear denning habitat model using a geographic information system
We used the Mahalanobis distance statistic and a raster geographic information system (GIS) to model potential black bear (Ursus americanus) denning habitat in the Ouachita Mountains of Arkansas. The Mahalanobis distance statistic was used to represent the standard squared distance between sample variates in the GIS database (forest cover type, elevation, slope, aspect, distance to...
Authors
J. D. Clark, S.G. Hayes, J.M. Pledger
Regulation of gill cytosolic corticosteroid receptors in juvenile Atlantic salmon: Interaction effects of growth hormone with prolactand triiodothyronine Regulation of gill cytosolic corticosteroid receptors in juvenile Atlantic salmon: Interaction effects of growth hormone with prolactand triiodothyronine
The potential effects of growth hormone (GH), prolactin (Prl), and triiodothyronine (T3) on gill Na+,K+-ATPase activity and corticosteroid receptor (CR) concentration (Bmax) and dissociation constant (Kd) were examined in juvenile Atlantic salmon (Salmo salar). Compared to controls, fish injected with GH (ovine, 5.0 μg g−1) had significantly greater gill Na+,K+-ATPase activity after 7...
Authors
J. M. Shrimpton, S. D. McCormick
Altitude and configuration of the potentiometric surface in Wallace Township, Chester County, Pennsylvania, February 1996 through June 1997 Altitude and configuration of the potentiometric surface in Wallace Township, Chester County, Pennsylvania, February 1996 through June 1997
No abstract available
Authors
Kenneth S. Eden, Frank M. Schneider
Lithium Lithium
The lithium industry can be divided into two sectors: ore concentrate producers and chemical producers. Ore concentrate producers mine lithium minerals. They beneficiate the ores to produce material for use in ceramics and glass manufacturing.
Authors
J. Ober
Yields and trends of nutrients and total suspended solids in nontidal areas of the Chesapeake Bay basin, 1985-96 Yields and trends of nutrients and total suspended solids in nontidal areas of the Chesapeake Bay basin, 1985-96
Excessive concentrations of nutrients and suspended solids in water adversely affect water quality in the Chesapeake Bay. High levels of nutrients in the Bay result in algal blooms and suspended solids reduce water clarity, both of which decrease the amount of light reaching submerged aquatic vegetation (SAV). The die off and decomposition of algae and SAV deplete oxygen supplies in the...
Authors
Michael J. Langland
Water quality in the White River basin, Indiana, 1992-96 Water quality in the White River basin, Indiana, 1992-96
No abstract available.
Authors
Joseph M. Fenelon
Estimating population parameters for northern and southern breeding populations of Canada geese Estimating population parameters for northern and southern breeding populations of Canada geese
Canada geese (Branta canadensis) have been managed largely as a migratory resource. In the 1960's, Canada goose flocks were restored to historic breeding ranges in the United States and southern Canada to enhance recreational opportunity for observation and harvest. These populations of southern breeding geese have rapidly expanded, increasing conflicts with social and economic interests...
Authors
J.B. Hestbeck
Field evidence for linking Altosid applications with increased amphibian deformities in southern leopard frogs [abstract] Field evidence for linking Altosid applications with increased amphibian deformities in southern leopard frogs [abstract]
During the summer of 1997 we repeatedly sprayed Altosid, a formulation of 4% methoprene used for mosquito control, on six constructed macrocosms. Six additional macrocosms were sprayed with Abate4E, containing the organophosphate pesticide temephos, and six were sprayed with water (controls). The wetlands were created on an impermeable foundation for research purposes and averaged 215 m2...
Authors
D. W. Sparling