Xenobiotic-induced apoptosis: significance and potential application as a general biomarker of response
Leonard I. Sweet, Dora R. Passino-Reader, Peter G. Meier, Geneva M. Omann
1999, Biomarkers (4) 237-253
The process of apoptosis, often coined programmed cell death, involves cell injury induced by a variety of stimuli including xenobiotics and is morphologically, biochemically, and physiologically distinct from necrosis. Apoptotic death is characterized by cellular changes such as cytoplasm shrinkage, chromatin condensation, and plasma membrane asymmetry. This form of cell...
Preferred temperatures of juvenile lake whitefish
Thomas A. Edsall
1999, Journal of Great Lakes Research (25) 583-588
Lake whitefish (Coregonus clupeaformis) supported valuable commercial fisheries in all of the Great Lakes until the 1950s to 1960s when their populations collapsed due to overfishing, pollution, and predation by the exotic sea lamprey (Petromyzon marinus). Reduction of these population stresses has permitted significant recovery of the lake whitefish in...
Decision analysis tools: use of the Legal-Institutional Analysis Model: Chapter 9
B. L. Lamb, N. Burkardt, D. Lybecker
1999, Book chapter, Handbook of global environmental policy and administration
No abstract available....
Long‐term trends in stream water and precipitation chemistry at five headwater basins in the northeastern United States
David W. Clow, M. Alisa Mast
1999, Water Resources Research (35) 541-554
Stream water data from five headwater basins in the northeastern United States covering water years 1968–1996 and precipitation data from eight nearby precipitation monitoring sites covering water years 1984‐1996 were analyzed for temporal trends in chemistry using the nonparametric seasonal Kendall test. Concentrations of SO4declined at three of five streams...
Bacteriophage PRD1 and silica colloid transport and recovery in an iron oxide-coated sand aquifer
J. N. Ryan, M. Elimelech, R.A. Ard, R.W. Harvey, P.R. Johnson
1999, Environmental Science & Technology (33) 63-73
Bacteriophage PRD1 and silica colloids were co-injected into sewage-contaminated and uncontaminated zones of an iron oxide-coated sand aquifer on Cape Cod, MA, and their transport was monitored over distances up to 6 m in three arrays. After deposition, the attached PRD1 and silica colloids were mobilized by three different chemical...
Mobilization and attenuation of metals downstream from a base-metal mining site in the Matra Mountains, northeastern Hungary
L. Odor, R. B. Wanty, I. Horvath, U. Fugedi
Gough L.P.Marsh S.P., editor(s)
1999, Journal of Geochemical Exploration (65) 47-60
Regional geochemical baseline values have been established for Hungary by the use of low-density stream-sediment surveys of flood-plain deposits of large drainage basins and of the fine fraction of stream sediments. The baseline values and anomaly thresholds thus produced helped to evaluate the importance of high toxic element concentrations found...
Conditions for bubble elongation in cold ice-sheet ice
R. B. Alley, J. J. Fitzpatrick
1999, Journal of Glaciology (45) 147-153
Highly elongated bubbles are sometimes observed in ice-sheet ice. Elongation is favored by rapid ice deformation, and opposed by diffusive processes. We use simple models to show that vapor transport dominates diffusion except possibly very close to the melting point, and that latent-heat effects are insignificant. Elongation...
Analysis of the tsunami generated by the MW 7.8 1906 San Francisco earthquake
E.L. Geist, M.L. Zoback
1999, Geology (27) 15-18
We examine possible sources of a small tsunami produced by the 1906 San Francisco earthquake, recorded at a single tide gauge station situated at the opening to San Francisco Bay. Coseismic vertical displacement fields were calculated using elastic dislocation theory for geodetically constrained...
High-grade iron ore deposits of the Mesabi Range, Minnesota-product of a continental-scale proterozoic ground-water flow system
G. B. Morey
1999, Economic Geology (94) 133-141
The Mesabi Range along the north edge of the Paleoproterozoic Penokean orogen in northern Minnesota has produced 3.6 billion metric tons of ore since its discovery in 1890. Of that amount, 2.3 billion metric tons were extracted from hematite-or goethite-rich deposits generally referred to as "high-grade" ores. The high-grade ores...
Wild turkey poult survival in southcentral Iowa
Michael W. Hubbard, D.L. Garner, Erwin E. Klaas
1999, Journal of Wildlife Management (63) 199-203
Poult survival is key to understanding annual change in wild turkey (Meleagris gallopavo) populations. Survival of eastern wild turkey poults (M. g. silvestris) 0-4 weeks posthatch was studied in southcentral Iowa during 1994-97. Survival estimates of poults were calculated based on biweekly flush counts and daily locations acquired via radiotelemetry....
Practical Scheffe‐type credibility intervals for variables of a groundwater model
Richard L. Cooley
1999, Water Resources Research (35) 113-126
Simultaneous Scheffé‐type credibility intervals (the Bayesian version of confidence intervals) for variables of a groundwater flow model calibrated using a Bayesian maximum a posteriori procedure were derived by Cooley [1993b]. It was assumed that variances reflecting the expected differences between observed and model‐computed quantities used to calibrate the model are known, whereas...
Photogrammetric analysis of horizon panoramas: The Pathfinder landing site in Viking orbiter images
J. Oberst, R. Jaumann, W. Zeitler, E. Hauber, M. Kuschel, T. Parker, M. Golombek, M. Malin, L. Soderblom
1999, Journal of Geophysical Research E: Planets (104) 8927-8933
Tiepoint measurements, block adjustment techniques, and sunrise/sunset pictures were used to obtain precise pointing data with respect to north for a set of 33 IMP horizon images. Azimuth angles for five prominent topographic features seen at the horizon were measured and correlated with locations of these features in Viking orbiter...
General geology and geomorphology of the Mars Pathfinder landing site
A. W. Ward, Lisa R. Gaddis, Randolph L. Kirk, Laurence A. Soderblom, K. L. Tanaka, M.P. Golombek, T. J. Parker, Ronald Greeley, R.O. Kuzmin
1999, Journal of Geophysical Research E: Planets (104) 8555-8571
The Mars Pathfinder (MPF) spacecraft landed on relatively young (late Hesperian-early Amazonian; 3.1-0.7 Ga) plains in Chryse Planitia near the mouth of Ares Vallis. Images returned from the spacecraft reveal a complex landscape of ridges and troughs, large hills and crater rims, rocks and boulders of various sizes and shapes,...
The chemical and isotopic differentiation of an epizonal magma body: Organ Needle pluton, New Mexico
P. L. Verplanck, G. L. Farmer, M. McCurry, S.A. Mertzman
1999, Journal of Petrology (40) 653-678
Major and trace element, and Nd and Sr isotopic compositions of whole rocks and mineral separates from the Oligocene, alkaline Organ Needle pluton (ONP), southern New Mexico, constrain models for the differentiation of the magma body parental to this compositionally zoned and layered epizonal intrusive body. The data reveal...
Tools for groundwater protection planning: An example from McHenry County, Illinois, USA
R. C. Berg, B. Brandon Curry, R. Olshansky
1999, Environmental Management (23) 321-331
This paper presents an approach for producing aquifer sensitivity maps from three-dimensional geologic maps, called stack-unit maps. Stack-unit maps depict the succession of geologic materials to a given depth, and aquifer sensitivity maps interpret the successions according to their ability to transmit potential contaminants. Using McHenry County, Illinois, as a...
Oil, gas field growth projections: Wishful thinking or reality?
E. D. Attanasi, R. F. Mast, D. H. Root
1999, Oil & Gas Journal (97)
The observed `field growth' for the period from 1992 through 1996 with the US Geological Survey's (USGS) predicted field growth for the same period are compared. Known field recovery of field size is defined as the sum of past cumulative field production and the field's proved reserves. Proved reserves are...
Mapping the rupture process of moderate earthquakes by inverting accelerograms
M. Hellweg, J. Boatwright
1999, Journal of Geophysical Research B: Solid Earth (104) 7319-7328
We present a waveform inversion method that uses recordings of small events as Green's functions to map the rupture growth of moderate earthquakes. The method fits P and S waveforms from many stations simultaneously in an iterative procedure to estimate the subevent rupture time and amplitude relative to the Green's function event. We invert...
Temporal variations in dissolved selenium in Lake Kinneret (Israel)
A. Nishri, I.B. Brenner, G.E.M. Hall, Howard E. Taylor
1999, Aquatic Sciences (61) 215-233
Selenium is an essential micronutrient for the growth of the dinoflagellate Peridinium gatunense that dominates the spring algal bloom in Lake Kinneret (LK). The relationship between the levels of dissolved selenium species and the occurance of algal blooms in this lake was studied. During algal blooms of P. gatunense in...
Distribution of trace elements in streambed sediment associated with mining activities in the Upper Colorado River Basin, Colorado, USA, 1995-96
J. R. Deacon, N. E. Driver
1999, Archives of Environmental Contamination and Toxicology (37) 7-18
Streambed-sediment samples were collected in the Southern Rocky Mountains physiographic province in the Upper Colorado River Basin in Colorado to characterize the occurrence and distribution of trace elements in mined and nonmined areas of the basin. During October 1995 and September 1996, streambed sediment was collected at 37 sites, and...
Correlative velocity fluctuations over a gravel river bed
Randal L. Dinehart
1999, Water Resources Research (35) 569-582
Velocity fluctuations in a steep, coarse‐bedded river were measured in flow depths ranging from 0.8 to 2.2 m, with mean velocities at middepth from 1.1 to 3.1 m s−1. Analyses of synchronous velocity records for two and three points in the vertical showed a broad range of high coherence for...
Movement of road salt to a small New Hampshire lake
D.O. Rosenberry, P.A. Bukaveckas, D.C. Buso, G.E. Likens, A.M. Shapiro, T. C. Winter
1999, Water, Air, & Soil Pollution (109) 179-206
Runoff of road salt from an interstate highway in New Hampshire has led to contamination of a lake and a stream that flows into the lake, in spite of the construction of a diversion berm to divert road salt runoff out of the lake drainage basin. Chloride concentration in the...
Greigite (Fe3S4) as an indicator of drought - The 1912-1994 sediment magnetic record from White Rock Lake, Dallas, Texas, USA
R. L. Reynolds, J. G. Rosenbaum, P. Van Metre, M. Tuttle, E. Callender, A. Goldin
1999, Journal of Paleolimnology (21) 193-206
Combined magnetic and geochemical studies were conducted on sediments from White Rock Lake, a reservoir in suburban Dallas (USA), to investigate how land use has affected sediment and water quality since the reservoir was filled in 1912. The chronology of a 167-cm-long core is constrained by the recognition of the...
Copper, lead, mercury and zinc in periphyton from the south Florida ecosystem
T. Cox, N.S. Simon, L. Newland
1999, Toxicological and Environmental Chemistry (70) 259-274
Periphyton samples from the Big Cypress National Preserve were analyzed for concentrations of copper, lead, zinc, mercury, and methylmercury. Concentrations of organic carbon, inorganic carbon, nitrogen, and phosphorus in periphyton samples also were determined. The samples were extracted with sodium acetate solution at a pH of 5.5 to determine exchangeable...
Deglaciation of the northwestern White Mountains, New Hampshire
Woodrow B. Thompson, Brian K. Fowler, C. C. Dorion
1999, Geographie Physique et Quaternaire (53) 59-77
The mode of deglaciation in the northwestern White Mountains of New Hampshire has been controversial since the mid 1800's. Early workers believed that active ice deposited the Bethlehem Moraine complex in the Ammonoosuc River basin during recession of the last ice sheet. In the 1930's this deglaciation model was replaced...
The Bear Brook Watershed, Maine (BBWM), USA
S. Norton, J. Kahl, I. Fernandez, T. Haines, L. Rustad, S. Nodvin, J. Scofield, T. Strickland, H. Erickson, P. Wigington Jr., J. Lee
1999, Environmental Monitoring and Assessment (55) 7-51
The Bear Brook Watershed Manipulation project in Maine is a paired calibrated watershed study funded by the U.S. EPA. The research program is evaluating whole ecosystem response to elevated inputs of acidifying chemicals. The consists of a 2.5 year calibration period (1987-1989), nine years of chemical additions of (NH4)2SO4 (15N-...
