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Page 2545, results 63601 - 63625

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DUCKS: Low cost thermal monitoring units for near-vent deployment
A. Harris, D. Pirie, K. Horton, H. Garbeil, E. Pilger, H. Ramm, R. Hoblitt, C. Thornber, M. Ripepe, E. Marchetti, P. Poggi
2005, Journal of Volcanology and Geothermal Research (143) 335-360
During 1999 we designed and tested a thermal monitoring system to provide a cheap, robust, modular, real-time system capable of surviving the hostile conditions encountered proximal to active volcanic vents. In November 2000 the first system was deployed at Pu'u...
Use of soil moisture probes to estimate ground water recharge at an oil spill site
G. N. Delin, W.N. Herkelrath
2005, Journal of the American Water Resources Association (41) 1259-1277
Soil moisture data collected using an automated data logging system were used to estimate ground water recharge at a crude oil spill research site near Bemidji, Minnesota. Three different soil moisture probes were tested in the laboratory as well as the field conditions of limited power...
Development of a solenoid pumped in situ zinc analyzer for environmental monitoring
T.P. Chapin, R. B. Wanty
2005, Analytica Chimica Acta (543) 199-208
A battery powered submersible chemical analyzer, the Zn-DigiScan (Zn Digital Submersible Chemical Analyzer), has been developed for near real-time, in situ monitoring of zinc in aquatic systems. Microprocessor controlled solenoid pumps propel sample and carrier through an anion exchange column to separate zinc from interferences, add colorimetric reagents, and propel...
Effects of stream flow intermittency on riparian vegetation of a semiarid region river (San Pedro River, Arizona)
J.C. Stromberg, K.J. Bagstad, J.M. Leenhouts, S.J. Lite, E. Makings
2005, River Research and Applications (21) 925-938
The San Pedro River in the southwestern United States retains a natural flood regime and has several reaches with perennial stream flow and shallow ground water. However, much of the river flows intermittently. Urbanization-linked declines in regional ground-water levels have raised concerns over the future status of the riverine ecosystem...
Climatic and topographic controls on the style and timing of Late Quaternary glaciation throughout Tibet and the Himalaya defined by 10Be cosmogenic radionuclide surface exposure dating
L.A. Owen, R.C. Finkel, P.L. Barnard, Ma Haizhou, K. Asahi, M.W. Caffee, E. Derbyshire
2005, Quaternary Science Reviews (24) 1391-1411
Temporal and spatial changes in glacier cover throughout the Late Quaternary in Tibet and the bordering mountains are poorly defined because of the inaccessibility and vastness of the region, and the lack of numerical dating. To help reconstruct the timing and extent of glaciation throughout Tibet and the bordering mountains,...
Effects of urbanization on benthic macroinvertebrate assemblages in contrasting environmental settings: Boston, Massachusetts; Birmingham, Alabama; and Salt Lake City, Utah
T. F. Cuffney, H. Zappia, E.M.P. Giddings, J.F. Coles
2005, American Fisheries Society Symposium (2005) 361-407
Responses of invertebrate assemblages along gradients of urban intensity were examined in three metropolitan areas with contrasting climates and topography (Boston, Massachusetts; Birmingham, Alabama; Salt Lake City, Utah). Urban gradients were defined using an urban intensity index (UII) derived from basin-scale population, infrastructure, land-use, land-cover, and socioeconomic characteristics. Responses based...
Detrital illite crystals identified from crystallite thickness measurements in siliciclastic sediments
L. Aldega, D. D. Eberl
2005, American Mineralogist (90) 1587-1596
Illite crystals in siliciclastic sediments are heterogeneous assemblages of detrital material coming from various source rocks and, at paleotemperatures >70 ??C, of superimposed diagenetic modification in the parent sediment. We distinguished the relative proportions of 2M1 detrital illite and possible diagenetic 1Md + 1M illite by a combined analysis of...
Does biofilm contribute to diel cycling of Zn in High Ore Creek, Montana?
J.M. Morris, D. A. Nimick, A.M. Farag, J.S. Meyer
2005, Biogeochemistry (76) 233-259
Concentrations of metals cycle daily in the water column of some mining-impacted streams in the Rocky Mountains of the western USA. We hypothesized that biofilm in High Ore Creek, Montana, USA, sorbs and releases Zn on a diel cycle, and this uptake-and-release cycle controls the total and dissolved (0.45-μm filtered)...
Assessing the competitive ability of Japanese stilt grass, Microstegium vimineum (Trin.) A. Camus
S. A. Leicht, J. A. Silander Jr., K. Greenwood
2005, Journal of the Torrey Botanical Society (132) 573-580
Microstegium vimineum (Japanese stilt grass) is an invasive grass in the eastern half of the United States which can form dense monocultures in forest understories, displacing native species. Although the loss of native species has been observed in the field, the actual competitive ability of this grass has not been...
Serosurvey of selected zoonotic agents in polar bears (Ursus maritimus)
H. Rah, B.B. Chomel, Erich H. Follmann, R.W. Kasten, C.H. Hew, T.B. Farver, G.W. Garner, Steven C. Amstrup
2005, Veterinary Record (156) 7-13
Between 1982 and 1999 blood samples were collected from 500 polar bears (Ursus maritimus) captured in the Beaufort and Chukchi seas, to determine the seroprevalence of Brucella species, Toxoplasma gondii, and Trichinella species infections. The bears were classified into four age groups, cubs, yearlings, subadults and adults. Brucella and Toxoplasma...
Landsat-4 and Landsat-5 thematic mapper band 6 historical performance and calibration
J. A. Barsi, G. Chander, B. L. Markham, N. Higgs
Butler J.J., editor(s)
2005, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
Launched in 1982 and 1984 respectively, the Landsat-4 and -5 Thematic Mappers (TM) are the backbone of an extensive archive of moderate resolution Earth imagery. However, these sensors and their data products were not subjected to the type of intensive monitoring that has been part of the Landsat-7 system since...
In situ treatability testing of reductive dechlorination in wetland sediments
M.M. Lorah, E. Majcher, E. Jones, G. Driedger, S. Dworatzek, D. Graves
2005, Conference Paper, Proceedings of the 8th International In Situ and On-Site Bioremediation Symposium
In situ treatability testing was conducted in the discharge wetlands along West Branch Canal Creek at Aberdeen Proving Ground, MD. The potential for stimulating reductive dechlorination of 1,1,2,2-tetrachloroethane, tetrachloroethylene, trichloroethylene, and carbon tetrachloride in areas of preferential discharge or seeps was evaluated. Geological Survey that degrades chlorinated ethanes and ethylenes...
Early marine life history of juvenile Pacific salmon in two regions of Puget Sound
E.J. Duffy, D.A. Beauchamp, R.M. Buckley
2005, Conference Paper, Estuarine, Coastal and Shelf Science
Puget Sound could differentially represent either a simple migration corridor or an important rearing environment during the potentially critical early marine residence period for different species of Pacific salmon. Recent declines in various stocks of Puget Sound salmon could reflect degraded rearing conditions or changes in temporal-spatial utilization patterns by...
The presence and near-shore transport of human fecal pollution in Lake Michigan beaches
S.L. Molloy, L.B. Liu, M.S. Phanikumar, T.M. Jenkins, M.V. Wong, J.B. Rose, R.L. Whitman, D.A. Shively, M.B. Nevers
2005, Conference Paper, Proceedings of MTS/IEEE OCEANS, 2005
The Great Lakes are a source of water for municipal, agricultural and industrial use, and support significant recreation, commercial and sport fishing industries. Every year millions of people visit the 500 plus recreational beaches in the Great Lakes. An increasing public health risk has been suggested with increased evidence of...
An integrated view of the chemistry and mineralogy of martian soils
A. S. Yen, Ralf Gellert, C. Schroder, R.V. Morris, J.F. Bell III, A.T. Knudson, B.C. Clark, D. W. Ming, J.A. Crisp, R. E. Arvidson, D. Blaney, J. Bruckner, P. R. Christensen, D.J. DesMarais, P.A. De Souza Jr., T.E. Economou, A. Ghosh, B.C. Hahn, Kenneth E. Herkenhoff, L.A. Haskin, J.A. Hurowitz, B.L. Joliff, J. R. Johnson, G. Klingelhofer, M.B. Madsen, S. M. McLennan, H.Y. McSween, L. Richter, R. Rieder, D. Rodionov, Laurence A. Soderblom, S. W. Squyres, N.J. Tosca, A. Wang, M. Wyatt, J. Zipfel
2005, Nature (436) 49-54
The mineralogical and elemental compositions of the martian soil are indicators of chemical and physical weathering processes. Using data from the Mars Exploration Rovers, we show that bright dust deposits on opposite sides of the planet are part of a global unit and not dominated by the composition of local...
Physically modeling operative temperatures and evaporation rates in amphibians
P.E. Bartelt, C.R. Peterson
2005, Journal of Thermal Biology (30) 93-102
  (1) We designed a physical model that simulates the thermal and evaporative properties of live Western toads (Bufo boreas). (2) In controlled tests, the model tracked the body temperature of live toads with an average error of 0.3±0.03 °C (test range=4–30 °C). (3) It estimated the evaporative water loss of live toads with...
Length-weight relationship and a relative condition factor equation for lake sturgeon (Acipenser fulvescens) from the St Clair River system (Michigan, USA)
J.M. Craig, M.V. Thomas, S. J. Nichols
2005, Journal of Applied Ichthyology (21) 81-85
Several USA state, federal, and Canadian agencies study lake sturgeon (Acipenser fulvescens) within the St Clair River and Lake St Clair, collectively referred to hereafter as the St Clair River (SCR) system. Previously, there has been no set standard for determining condition for SCR system lake sturgeon. Condition measures the...
Diet overlap of introduced rainbow trout and three native fishes in an Ozark stream
D.B. Fenner, M. G. Walsh, D.L. Winkelman
2005, American Fisheries Society Symposium (2005) 475-482
Private angling groups in Oklahoma have requested permission to stock rainbow trout Oncorhynchus mykiss into streams of northeastern Oklahoma although little is known regarding interactions between introduced rainbow trout and native fishes in these systems. Our study objectives were to assess diet overlap between introduced rainbow trout and native smallmouth...
Breeding ecology of the Puaiohi (Myadestes palmeri)
Thomas J. Snetsinger, Christina M. Hermann, Dawn E. Holmes, C. D. Hayward, Steven G. Fancy
2005, The Wilson Bulletin (117) 72-84
We studied the breeding ecology of the critically endangered Puaiohi (Myadestes palmeri), a poorly known Hawaiian thrush endemic to the island of Kauai. From 1996 through 1998, we monitored 96 active nests over the course of three breeding seasons. Mean clutch size was 2.0, and pairs produced an average...
A statistical approach to estimate the 3D size distribution of spheres from 2D size distributions
M. Kong, R.N. Bhattacharya, C. James, A. Basu
2005, Geological Society of America Bulletin (117) 244-249
Size distribution of rigidly embedded spheres in a groundmass is usually determined from measurements of the radii of the two-dimensional (2D) circular cross sections of the spheres in random flat planes of a sample, such as in thin sections or polished slabs. Several methods have been devised to find a...
Adsorption equilibrium of organic vapors on single-walled carbon nanotubes
S. Agnihotri, M.J. Rood, M. Rostam-Abadi
2005, Carbon (43) 2379-2388
Gravimetric techniques were employed to determine the adsorption capacities of commercially available purified electric arc and HiPco single-walled carbon nanotubes (SWNTs) for organic compounds (toluene, methyl ethyl ketone (MEK), hexane and cyclohexane) at relative pressures, p/p0, ranging from 1 ?? 10-4 to 0.95 and at isothermal conditions of 25, 37...