Florian Maldonado, L. David Nealey
1997, Bulletin 2153
No abstract available....
Search Results
184938 results.
Alternate formats: RIS file of the first 3000 search results | Download all results as CSV | TSV | Excel | RSS feed based on this search | JSON version of this page of results
Page 3620, results 90476 - 90500
Publication Extents
Not all publications have extents, not all extents are completely accurateG.A. Ulrich, L.R. Krumholz, J.M. Suflita
1997, Applied and Environmental Microbiology (63) 1627-1630
A simplified passive extraction procedure for quantifying reduced inorganic sulfur compounds from sediments and water is presented. This method may also be used for the estimation of sulfate reduction rates. Efficient extraction of FeS, FeS2, and S2- was obtained with this procedure; however, the efficiency for...
A. P. Barth, R. M. Tosdal, J. L. Wooden, K. A. Howard
1997, Tectonics (16) 290-304
Earliest Cordilleran magmatism in the southwestern United States is recorded by a belt of Triassic plutons that intrude Proterozoic basement of the Mojave crustal province and its cratonal/miogeoclinal cover. The belt extends from the western Mojave Desert through the Transverse Ranges to the Colorado River trough. Triassic plutons are predominantly...
John R. Fischer, David E. Stallknecht, M. Page Luttrell, Andre A. Dhondt, Kathryn A. Converse
1997, Emerging Infectious Diseases (3) 69-71
A new mycoplasmal conjunctivitis was first reported in wild house finches (Carpodacus mexicanus) in early 1994. The causative agent was identified as Mycoplasma gallisepticum (MG), a nonzoonotic pathogen of poultry that had not been associated with disease in wild songbirds. Since the initial observations of affected house finches in the mid-Atlantic region,...
Jacoby Carter
1997, SWS Bulletin (14) 38-39
No abstract available....
Jeff J. Rach, George E. Howe, Theresa M. Schreier
1997, Aquaculture (149) 183-191
Formalin is widely used for treating fungal infections of fish eggs in intensive aquaculture operations. The use of formalin in the United States is only allowed on salmonid and esocid eggs unless a special exemption is granted for use on other species. This study was conducted to determine the safety...
Harry J. Dowsett, Marci M. Robinson
1997, Palaeontologia Electronica 1-22
Seventy-two samples from Deep Sea Drilling Project Sites 445 and 463 and Ocean Drilling Program Site 769 from the northwest Pacific Ocean were compared to 499 modern core top Pacific Ocean samples using the squared chord distance dissimilarity measure. Many samples show high levels of dissimilarity that can be explained...
P.J. Noble, Keith B. Ketner, W. McClellan
1997, Marine Micropaleontology (30) 215-223
Radiolarians recovered from three sites in the early Llandoverian Cherry Spring chert, north-central Nevada, provide the first Early Silurian radiolarian data from the conterminous United States. Two assemblages were recovered that contain abundant pylomate sphaerellarians, rotasphaerids, inaniguttids, and possible palaeoactinosphaerids. The pylomate taxa have an intermediate spine morphology with Cessipylorum and Aciferopylorum, bringing...
Jin Yugan, Bruce R. Wardlaw, Brian F. Glenister, Galina V. Kotlyar
1997, Episodes (20) 10-15
Names and boundary levels for series and stages of the Permian System, based on marine successions, have been approved by the Permian Subcommission, ICS. These are the Cisuralian, Guadalupian, and Lopingian Series and their constituent stages standardized respectively in the Urals, Southwest USA, and South China for the Lower; Middle,...
W. L. Kendall, James D. Nichols, James E. Hines
1997, Ecology (78) 563-578
Statistical inference for capture–recapture studies of open animal populations typically relies on the assumption that all emigration from the studied population is permanent. However, there are many instances in which this assumption is unlikely to be met. We define two general models for the process of temporary emigration: completely random...
James R. Baker, James R. Mihelcic, Dean C. Luehrs, James P. Hickey
1997, Water Environment Research (69) 136-145
A critically evaluated set of 94 soil water partition coefficients normalized to soil organic carbon content (Koc) is presented for 11 classes of organic chemicals. This data set is used to develop and evaluate Koc estimation methods using three different descriptors. The three types of descriptors used in predicting Koc...
T.R. Maret, C.T. Robinson, G.W. Minshall
1997, Transactions of the American Fisheries Society (126) 200-216
Fish assemblages and environmental variables were evaluated from 37 least‐disturbed, 1st‐ through 6th‐order streams and springs in the upper Snake River basin, western USA. Data were collected as part of the efforts by the U.S. Geological Survey National Water Quality Assessment Program and the Idaho State University...
David P. Mau, Thomas C. Winter
1997, Groundwater (35) 291-304
Hydrographs of stream discharge were analyzed to determine ground-water recharge for two small basins draining into Mirror Lake, New Hampshire. Two methods of hydrograph analysis developed for determining ground-water recharge were evaluated, the instantaneous recharge method and the constant recharge method. For the instantaneous recharge method, recharge is assumed to...
N.H. Euliss Jr., R. L. Jarvis, D.S. Gilmer
1997, Wetlands (17) 106-115
We examined carcass composition and proximate food composition of ruddy ducks (Oxyura jamaicensis), northern shovelers (Anas clypeata), and northern pintails (Anas acuta) wintering on agricultural drainwater ponds in California during 1983–84. Lipids varied seasonally in northern shovelers and northern pintails. Protein did not fluctuate except in ruddy ducks whose protein...
G.T. Auble, M. L. Scott, Jonathan M. Friedman, J. Back, V.J. Lee
1997, Wetlands (17) 138-148
Plot sampling and hydraulic modeling were combined to investigate establishment and survival of plains cottonwood along Boulder Creek, an urban stream on the Colorado Plains. We tested the hypothesis that establishment is limited to bare, moist surfaces produced by spring flooding in the current year. No cottonwood germination was observed...
Donald A. Singer, Ryoichi Kouda
1997, Nonrenewable Resources (6) 27-32
In order to determine whether it is desirable to quantify mineral-deposit models further, a test of the ability of a probabilistic neural network to classify deposits into types based on mineralogy was conducted. Presence or absence of ore and alteration mineralogy in well-typed deposits were used to train the network....
J. Whitfield Gibbons, Vincent J. Burke, Jefferey E. Lovich, Raymond D. Semlitsch, Tracey D. Tuberville, J. Russell Bodie, Judith L. Greene, Peter H. Niewiarowski, Howard H. Whiteman, David E. Scott, Joseph H. K. Pechmann, Christopher R. Harrison, Stephen H. Bennett, John D. Krenz, Mark S. Mills, Kurt A. Buhlmann, John R. Lee, Richard A. Seigel, Anton D. Tucker, Tony M. Mills, Trip Lamb, Michael E. Dorcas, Justin D. Congdon, Michael H. Smith, David H. Nelson, M. Barbara Dietsch, Hugh G. Hanlin, Jeannine A. Ott, Deno J. Karapatakis
1997, Environmental Management (21) 259-268
We examined data relative to species abundance, distribution, and diversity patterns of reptiles and amphibians to determine how perceptions change over time and with level of sampling effort. Location data were compiled on more than one million individual captures or observations of 98 species during a 44-year study period on...
Boyd Kynard
1997, Environmental Biology of Fishes (48) 319-334
Historically, shortnose sturgeon inhabited most major rivers on the Atlantic coast of North America south of the Saint John River, Canada. Today, only 16 populations may remain. Major anthropogenic impacts on shortnose sturgeon are blockage of spawning runs by dams, harvest of adults (bycatch and poaching), dredging of fresh/saltwater riverine...
Terrie Mackin Lee, Amy Swancar
1997, Water Supply Paper 2439
A detailed hydrologic budget was constructed of a seepage lake of sinkhole origin in the karst terrain of central Florida. During the drought period studied, lake evaporation computed by the energy-budget and mass-transfer methods was the largest component in the budget, followed by rainfall. Ground-water inflow contributed about one-third of...
V. S. Williams, M. G. Best, J. D. Keith
1997, IMAP 2479
J. Kazumi, M.E. Caldwell, J.M. Suflita, D.R. Lovely, L.Y. Young
1997, Environmental Science & Technology (31) 813-818
Benzene has often been observed to be resistant to microbial degradation under anoxic conditions. A number of recent studies, however, have demonstrated that anaerobic benzene utilization can occur. This study extends the previous reports of anaerobic benzene degradation to sediments that varied with respect to contamination input, predominant redox condition,...
Sujoy B. Roy, David A. Dzombak
1997, Environmental Science & Technology (31) 656-664
The effects of colloids on the transport of two strongly sorbing solutesa hydrophobic organic compound, phenanthrene, and a metal ion, Ni2+were studied in sand-packed laboratory columns under different pH and ionic strength conditions. Two types of column experiments were performed as follows:...
William A. Lellis, Frederic T. Barrows
1997, Aquaculture (156) 229-240
A 2 × 2 factorial experiment of diet type (krill vs. fish meal) and steroid supplementation (0 vs. 30 μg 17α-methyltestosterone kg−) was conducted to determine the effects on dorsal fin erosion in steelhead trout. Triplicate tanks of 250 fry were fed one of the four diets at a rate...
M. P. Golombek, R. A. Cook, H. J. Moore, Thomas J. Parker
1997, Journal of Geophysical Research Planets (102) 3967-3988
The Mars Pathfinder spacecraft will land on a depositional fan near the mouth of the catastrophic outflow channel, Ares Vallis (19.5°N, 32.8°W). This site offers the prospect of analyzing a variety of rock types from the ancient cratered highlands, intermediate-age ridged plains, and reworked channel deposits. Analyses of these rocks...
P. H. Smith, M.G. Tomasko, D. Britt, D.G. Crowe, R. Reid, H.U. Keller, N. Thomas, F. Gliem, P. Rueffer, R. Sullivan, R. Greeley, J. M. Knudsen, M.B. Madsen, H.P. Gunnlaugsson, S.F. Hviid, W. Goetz, Laurence A. Soderblom, L. Gaddis, Randolph L. Kirk
1997, Journal of Geophysical Research E: Planets (102) 4003-4025
The imager for Mars Pathfinder (IMP), a stereoscopic, multispectral camera, is described in terms of its capabilities for studying the Martian environment. The camera's two eyes, separated by 15.0 cm, provide the camera with range‐finding ability. Each eye illuminates half of a single CCD detector with a field of view...