Disposition of pentachlorophenol in rainbow trout (Salmo gairdneri): Effect of inhibition of metabolism
G. R. Stehly, W. L. Hayton
1989, Aquatic Toxicology (14) 131-148
The accumulation kinetics of pentachlorophenol (PCP) were investigated in rainbow trout (Salmo gairdneri) in the absence and presence of 25 mg/1 salicylamide, an inhibitor of PCP metabolism. After exposure to 5 μg/1 PCP over 1–96 h, the amount of PCP in the whole fish, its concentration in water and the...
Studies of angiospermous wood in Australian brown coal by nuclear magnetic resonance and analytical pyrolysis: New insights into the early coalification process
Patrick G. Hatcher, M. A. Wilson, A. M. Vassallo, H. E. Lerch III
1989, International Journal of Coal Geology (13) 99-126
Many Tertiary coals contain abundant fossilized remains of angiosperms, which commonly dominated the ancient peat-swamp environments; modern analogs of such swamps can be found in tropical and subtropical regions of the world. Comparisons of angiospermous wood from Australian brown coal with...
Influence of mineral weathering reactions on the chemical composition of soil water, springs, and ground water, Catoctin Mountains, Maryland
B. G. Katz
1989, Hydrological Processes (3) 185-202
During 1983 and 1984, wet precipitation was primarily a solution of dilute sulphuric acid, whereas calcium and bicarbonate were the major ions in springs and ground water in two small watersheds with a deciduous forest cover in central Maryland. Dominant ions in soil water were...
Introduction to the hydrogeochemical investigations within the International Stripa Project
D. Kirk Nordstrom, T. Olsson, L. Carlsson, P. Fritz
1989, Geochimica et Cosmochimica Acta (53) 1717-1726
The International Stripa Project (1980-1990) has sponsored hydrogeochemical investigations at several subsurface drillholes in the granitic portion of an abandoned iron ore mine, central Sweden. The purpose has been to advance our understanding of geochemical processes in crystalline bedrock that may affect the safety assessment of high-level radioactive waste repositories....
Depositional aspects and a guide to Paleocene coal-bearing sequences, Powder River Basin
Romeo M. Flores, Peter D. Warwick, Timothy A. Moore
Romeo M. Flores, Peter D. Warwick, Timothy A. Moore, Gary Glass, Archie Smith, Douglas J. Nichols, Jack A. Wolfe, Ronald W. Stanton, Jean Weaver, editor(s)
1989, Conference Paper, Tertiary and Cretaceous coals in the Rocky Mountains region: Casper, Wyoming to Salt Lake City, Utah June 29-July 8, 1989
The Paleocene coal-bearing sequences in the northern Powder River Basin are contained in the Tongue River Member of the Fort Union Formation and include anomalously thick (54 m) subbituminous coals. These thick coals have been the target of exploration and development for the past few decades. For the past decade,...
Optimal-adaptive filters for modelling spectral shape, site amplification, and source scaling
Erdal Safak
1989, Soil Dynamics and Earthquake Engineering (8) 75-95
Optimal filtering techniques have been used successfully in various areas in science and engineering. They are based on statistical properties of the signal and the noise, and stochastic approximation theory. In addition to filtering, optimal filters can also be used for smoothing, prediction, and system identification. This paper introduces some...
Moment-tensor solutions estimated using optimal filter theory: global seismicity, 1984-1987
S.A. Sipkin, R.E. Needham
1989, Physics of the Earth and Planetary Interiors (57) 233-259
Moment-tensor solutions, estimated using optimal filter theory, are listed for 426 moderate- to large-sized earthquakes occurring from 1984 to 1987. ?? 1989....
The timing of uplift, volcanism, and rifting peripheral to the Red Sea: A case for passive rifting?
R. G. Bohannon, C. W. Naeser, D. L. Schmidt, R.A. Zimmermann
1989, Journal of Geophysical Research Solid Earth (94) 1683-1701
Prior to the formation of the Red Sea the northeastern Afro/Arabian continent had low relief and was largely below sea level from the Late Cretaceous to the early Oligocene. The events leading to the formation of the Red Sea followed the sequence (1) alkaline volcanism and rifting beginning about 30–32...
Large-scale magnetic field perturbation arising from the 18 May 1980 eruption from Mount St. Helens, Washington
R.J. Mueller, M.J.S. Johnston
1989, Physics of the Earth and Planetary Interiors (57) 23-31
A traveling magnetic field disturbance generated by the 18 may 1980 eruption of Mount St. Helens at 1532 UT was detected on an 800-km linear array of recording magnetometers installed along the San Andreas fault system in California, from San Francisco to the Salton Sea. Arrival times of the disturbance...
Recorded seismic response of a base-isolated steel bridge carrying a steel water pipe
E. Safak, A. G. Brady
1989, Conference Paper, American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
A set of strong motion records was obtained from the base-isolated Santa Ana River Pipeline Bridge during the magnitude 5.9 Whittier Narrows, California, earthquake of October 1, 1987. The analysis of the records show that the level of excitation was not strong enough to fully activate the base isolators. The...
Accounting for intracell flow in models with emphasis on water table recharge and stream-aquifer interaction: 1. Problems and concepts
Donald G. Jorgensen, Donald C. Signor, Jeffrey L. Imes
1989, Water Resources Research (25) 669-676
Intracell flow is important in modeling cells that contain both sources and sinks. Special attention is needed if recharge through the water table is a source. One method of modeling multiple sources and sinks is to determine the net recharge per cell. For example, for a model cell containing both...
Survey of three-dimensional numerical estuarine models
Ralph T. Cheng, Peter E. Smith
1989, Conference Paper
This paper surveys the existing 3-D estuarine hydrodynamic and solute transport models by a review of the commonly used assumptions and approximations, and by an examination of the methods of solution. The model formulations, methods of solution, and known applications are surveyed and summarized in tables. In conclusion, the authors...
A branched hydrodynamic model of the Sacramento–San Joaquin Delta, California
F. N. Wong, R. T. Cheng
1989, Conference Paper, Proceedings, National Conference on Hydraulic Engineering
No abstract available....
The relationship of catchment topography and soil hydraulic characteristics to lake alkalinity in the northeastern United States
D.M. Wolock, G.M. Hornberger, K.J. Beven, W.G. Campbell
1989, Water Resources Research (25) 829-837
We undertook the task of determining whether base flow alkalinity of surface waters in the northeastern United States is related to indices of soil contact time and flow path partitioning that are derived from topographic and soils information. The influence of topography and soils on catchment hydrology has been incorporated...
Behavioural interaction between fish predators and their prey: effects of plant density
Jacqueline F. Savino, Roy A. Stein
1989, Animal Behaviour (37) 311-321
Prey-specific anti-predatory behaviour under different degrees of structural complexity determines foraging success of predators. The behaviour of piscivorous fish (largemouth bass, Micropterus salmoides and northern pike, Esox lucius) and their prey (bluegills, Lepomis macrochirus, and fathead minnows, Pimephales promelas) were quantified in 60-min experiments in laboratory pools (2 multiplied by...
A random spatial network model based on elementary postulates
Michael R. Karlinger, Brent M. Troutman
1989, Water Resources Research (25) 793-798
A model for generating random spatial networks that is based on elementary postulates comparable to those of the random topology model is proposed. In contrast to the random topology model, this model ascribes a unique spatial specification to generated drainage networks, a distinguishing property of some network growth models. The...
A model of channel response in disturbed alluvial channels
A. Simon
1989, Earth Surface Processes and Landforms (14) 11-26
Dredging and straightening of alluvial channels between 1959 and 1978 in West Tennessee caused a series of morphologic changes along modified reaches and tributary streams. Degradation occurred for 10 to 15 years at sites upstream of the area of maximum disturbance and lowered bed-levels by as much as 6.1 m....
Oxidation of aromatic contaminants coupled to microbial iron reduction
Derek R. Lovley, M.J. Baedecker, D.J. Lonergan, I.M. Cozzarelli, Elizabeth J.P. Phillips, D. I. Siegel
1989, Nature (339) 297-300
THE contamination of sub-surface water supplies with aromatic compounds is a significant environmental concern1,2. As these contaminated sub-surface environments are generally anaerobic, the microbial oxidation of aromatic compounds coupled to nitrate reduction, sulphate reduction and methane production has been studied intensively1-7. In addition, geochemical evidence suggests that Fe(III) can be...
The nature of the crust in the Yukon-Koyukuk province as inferred from the chemical and isotopic composition of five Late Cretaceous to Early Tertiary volcanic fields in western Alaska
E. Moll-Stalcup, Joseph G. Arth
1989, Journal of Geophysical Research Solid Earth (94) 15989-16020
Late Cretaceous and early Tertiary volcanic and plutonic rocks in western Alaska comprise a vast magmatic province extending from the Alaska Range north to the Arctic Circle, south to Bristol Bay, and west to the Bering Sea Shelf. The chemical and isotopic composition of five of these Late Cretaceous to...
Remarkable isotopic and trace element trends in potassic through sodic Cretaceous plutons of the Yukon-Koyukuk Basin, Alaska, and the nature of the lithosphere beneath the Koyukuk terrane
Joseph G. Arth, Robert E. Criss, Clara C. Zmuda, Nora K. Foley, W. W. Patton Jr., T. P. Miller
1989, Journal of Geophysical Research B: Solid Earth (94) 15957-15968
During the period from 110 to 80 m.y. ago, a 450-km-long magmatic belt was active along the northern margin of Yukon-Koyukuk basin and on eastern Seward Peninsula. The plutons intruded Upper Jurassic(?) and Lower Cretaceous volcanic arc rocks and Cretaceous sedimentary rocks in Yukon-Koyukuk basin and Proterozoic and lower Paleozoic...
The campi flegrei (Italy) geothermal system: A fluid inclusion study of the mofete and San Vito fields
Vivo B. de, H. E. Belkin, M. Barbieri, W. Chelini, P. Lattanzi, A. Lima, L. Tolomeo
1989, Journal of Volcanology and Geothermal Research (36) 303-326
A fluid inclusion study of core from the Mofete 1, Mofete 2, Mofete 5, San Vito 1, and San Vito 3 geothermal wells (Campi Flegrei, Campania, Italy) indicates that the hydrothermal minerals were precipitated from aqueous fluids (??CO2) that were moderately saline (3-4 wt.% NaCl equiv.) to hypersaline (> 26...
Problems of snowmelt runoff modelling for a variety of physiographic and climatic conditions
G.H. Leavesley
1989, Hydrological Sciences Journal (34) 617-634
Problems include: a) definition of the spatial and temporal distribution of model input; b) measurement or estimation of snow accumulation, snowmelt, and runoff process parameters for a range of applications and scales; and c) development of accurate short term and long term snowmelt runoff forecasts. Procedures being investigated to solve...
Air permeability and trapped-air content in two soils
David A. Stonestrom, Jacob Rubin
1989, Water Resources Research (25) 1959-1969
To improve understanding of hysteretic air permeability relations, a need exists for data on the water content dependence of air permeability, matric pressure, and air trapping (especially for wetting-drying cycles). To obtain these data, a special instrument was designed. The instrument is a combination of a gas permeameter (for air...
A hybrid fast Hankel transform algorithm for electromagnetic modeling
W.L. Anderson
1989, Geophysics (54) 263-266
A hybrid fast Hankel transform algorithm has been developed that uses several complementary features of two existing algorithms: Anderson's digital filtering or fast Hankel transform (FHT) algorithm and Chave's quadrature and continued fraction algorithm. A hybrid FHT subprogram (called HYBFHT) written in standard Fortran-77 provides a simple user interface to...
Reversed-phase thin-layer chromatography of homologs of Antimycin-A and related derivatives
Sharon L. Abidi
1989, Journal of Chromatography (464) 453-458
Using a reversed-phase high-performance liquid chromatographic (HPLC) technique, a mixture of antimycins A was separated into eight hitherto unreported subcomponents, Ala, Alb, A2a, A2b, A3a, A3b, A4a, and A4b. Although a base-line resolution of the known four major antimycins Al, A2, A3, and A4 was readily achieved with mobile phases...
