Carbon isotope effects associated with autotrophic acetogenesis
J.T. Gelwicks, J.B. Risatti, J.M. Hayes
1989, Organic Geochemistry (14) 441-446
The carbon kinetic isotope effects associated with synthesis of acetate from CO2 and H2 during autotrophic growth of Acetobacterium woodii at 30°C have been measured by isotopic analyses of CO2, methyl-carbon, and total acetate. Closed systems allowing construction of complete mass balances at varying stages of...
Heat capacities and entropies at 298.15 K of MgTiO3 (geikielite), ZnO (zincite), and ZnCO3 (smithsonite)
R. A. Robie, H.T. Haselton Jr., B. S. Hemingway
1989, Journal of Chemical Thermodynamics (21) 743-749
Heat capacities of synthetic MgTiO3 (geikielite), ZnO (zincite), and natural crystals of smithsonite (ZnCO3) were measured between 9 and 366 K using an automatic adiabatically shielded calorimeter. At 298.15 K the standard molar entropies Smo of MgTiO3, ZnO, and ZnCO3 are (74.64 ?? 0.15), (43.16 ?? 0.09), and (81.19 ??...
The prediction of aquatic sediment-associated trace element concentration using selected geochemical factors
A. J. Horowitz, K. A. Elrick, R. P. Hooper
1989, Hydrological Processes (3) 347-364
Multiple linear regression models calculated from readily obtainable chemical and physical parameters can explain a high percentage (70 per cent or greater) of observed sediment-trace element variance for Cu, Zn, Pb, Cr, Ni, Co, As, Sb, Se, and Hg in a widely divergent suite of...
Use of multivariate analysis for determining sources of solutes found in wet atmospheric deposition in the United States
R. P. Hooper, N.E. Peters
1989, Environmental Science & Technology (23) 1263-1268
No abstract available....
Aqueous chlorination of resorcinol
V.L. Heasley, M.D. Burns, N.A. Kemalyan, T.C. Mckee, H. Schroeter, B.R. Teegarden, S.E. Whitney, R.L. Wershaw
1989, Environmental Toxicology and Chemistry (8) 1159-1163
An investigation of the aqueous chlorination (NaOCl) of resorcinol is reported. The following intermediates were detected in moderate to high yield at different pH values and varying percentages of chlorination: 2-chloro-, 4-chloro-, 2,4-dichloro-, 4,6-dichloro- and 2,4,6-trichlororesorcinol. Only trace amounts of the intermediates were detected when the chlorination was conducted in...
Isotopic and trace element variations in the Ruby Batholith, Alaska, and the nature of the deep crust beneath the Ruby and Angayucham Terranes
Joseph G. Arth, Clara C. Zmuda, Nora K. Foley, Robert E. Criss, W. W. Patton Jr., T. P. Miller
1989, Journal of Geophysical Research B: Solid Earth (94) 15941-15955
Thirty-six samples from plutons of the Ruby batholith of central Alaska were collected and analyzed for 22 trace elements, and many were analyzed for the isotopic compositions of Sr, Nd, O, and Pb in order to delimit the processes that produced the diversity of granodioritic to granitic compositions, to deduce...
Interaction of fine sediment with alluvial streambeds
Harvey E. Jobson, William P. Carey
1989, Water Resources Research (25) 135-140
More knowledge is needed about the physical processes that control the transport of fine sediment moving over an alluvial bed. The knowledge is needed to design rational sampling and monitoring programs that assess the transport and fate of toxic substances in surface waters because the toxics are often associated with...
Transition 1988: earth science in the public service
Water Resources Division, U.S. Geological Survey
1989, Report
No abstract available....
Estimating constituent loads
Timothy A. Cohn, Lewis L. DeLong, Edward J. Gilroy, Robert M. Hirsch, Deborah K. Wells
1989, Water Resources Research (25) 937-942
Several recent articles have called attention to the problem of retransformation bias, which can arise when log linear regression models are used to estimate sediment or other constituent loads. In some cases the bias can lead to underestimation of constituent loads by as much as 50%, and several procedures have...
Adaptive modeling, identification, and control of dynamic structural systems. I. Theory
Erdal Safak
1989, Journal of Engineering Mechanics (115) 2386-2405
A concise review of the fheory of adaptive modeling, identification, and control of dynamic structural systems based on discrete‐time recordings is presented. Adaptive methods have four major advantages over the classical methods: (1) Removal of the noise from the signal is done over the whole frequency band; (2) time‐varying characteristics...
Mid-Cretaceous alluvial-plain incision related to eustasy, southeastern Colorado Plateau
W. M. Aubrey
1989, Geological Society of America Bulletin (101) 443-449
Eustatic effects on the deposition of ancient coastal and marine rocks are well known, but eustasy also can affect depositional patterns and processes well inland from the sea and play an important role in the development of nonmarine unconformities. In the southeastern part of the Colorado Plateau, fluvial rocks of...
Investigations of SPOT cartographic applications in the U.S. Geological Survey
June M. Thormodsgard, Glen G. Kelly, Jeffrey D. Spooner
1989, CISM Journal ACSGC (43) 145-149
The US Geological Survey has a longstanding commitment to the advancement of the technology and applications of remotely sensed data from civilian satellite systems. In the past, research based on satellite data was primarily directed toward natural resource and land use applications rather than cartographic applications. The availability of high-resolution,...
A direct correlation among indoor Rn, soil gas Rn and geology in the Reading Prong near Boyertown, Pennsylvania
G.M. Reimer, L.C.S. Gundersen
1989, Health Physics (57) 155-160
We feel that this study suggests a relationship among geology, soil gas Rn and the potential for indoor Rn accumulation in this portion of the Reading Prong. There are deviations from a perfect correlation but these are related to inhomogeneities in the geologic environment and perhaps variations in construction techniques...
Winter raptor use of the Platte and North Platte River Valleys in south central Nebraska
G.R. Lingle
1989, Prairie Naturalist (21) 1-16
Winter distribution and abundance of raptors were monitored within the Platte and North Platte river valleys. Data were collected along 265 km of census routes along the Platte and North Platte rivers during the winters of 1978-1979 and 1979-1980. Observations recorded during the second winter involved less observation time and...
Paleogeothermal gradients and timing of oil generation in the Belden Formation, Eagle Basin, northwestern Colorado
V. F. Nuccio, S. Y. Johnson, Christopher J. Schenk
1989, Mountain Geologist (26) 31-41
Paleogeothermal gradients and timing of oil generation for the Lower and Middle Pennsylvanian Belden Formation have been estimated for four locations in the Eagle Basin of northwestern Colorado, by comparing measured vitrinite reflectance with maturity modeling. Two thermal models were made for each location: one assumes a constant paleogeothermal gradient...
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....
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...
The structure of subtidal currents within and around Lydonia Canyon: Evidence for enhanced cross-shelf fluctuations over the mouth of the canyon
M. Noble, B. Butman
1989, Journal of Geophysical Research - Oceans (94) 8091-8110
Between October 1980 and April 1981, currents were measured within Lydonia Canyon and on the adjacent shelf and slope. The amplitude of the subtidal currents over the shelf and slope ranged between 10 and 30 cm s−1, but within the canyon, they were typically smaller than 5 cm s−1. The...
Bedrock geology and tectonic evolution of the Wrangellia, Peninsular, and Chugach terranes along the Trans-Alaska Crustal Transect in the Chugach Mountains and southern Copper River Basin, Alaska
George Plafker, W. J. Nokleberg, J. S. Lull
1989, Journal of Geophysical Research Solid Earth (94) 4255-4295
The Trans-Alaskan Crustal Transect in the southern Copper River Basin and Chugach Mountains traverses the margins of the Peninsular and Wrangellia terranes, and the adjacent accretionary oceanic units of the Chugach terrane to the south. The southern Wrangellia terrane margin consists of a polymetamorphosed magmatic arc complex at least in...
Multiobjective sampling design for parameter estimation and model discrimination in groundwater solute transport
Debra S. Knopman, Clifford I. Voss
1989, Water Resources Research (25) 2245-2258
Sampling design for site characterization studies of solute transport in porous media is formulated as a multiobjective problem. Optimal design of a sampling network is a sequential process in which the next phase of sampling is designed on the basis of all available physical knowledge of the system. Three objectives...
Estimates of undiscovered conventional oil and gas resources in the United States; a part of the Nation's energy endowment
R. F. Mast, G.L. Dolton, R. A. Crovelli, D. H. Root, E. D. Attanasi, P.E. Martin, L.W. Cooke, G.B. Carpenter, W.C. Pecora, M.B. Rose
1989, Report
Solid-state 13C NMR studies of a large fossil gymnosperm from the Yallourn Open Cut, Latrobe Valley, Australia
Anne L. Bates, Patrick G. Hatcher
1989, Organic Geochemistry (14) 609-617
A series of samples taken from the cross section of a 3-m-diameter fossilized gymnospermous log (Araucariaceae) in the Yallourn Seam of the Australian brown coals was examined by solid state 13C nuclear magnetic resonance to delineate chemical changes related to the combined processes of peatification and coalification. The results show that...
Solubility of jarosite solid solutions precipitated from acid mine waters, Iron Mountain, California
Charles N. Alpers, D. Kirk Nordstrom, J.W. Ball
1989, Science Geological Bulletin (42) 281-298
Because of the common occurrence of 15 to 25 mole percent hydronium substitution on the alkali site in jarosites, it is necessary to consider the hydronium content of jarosites in any attempt at rigorous evaluation of jarosite solubility or of the saturation state of natural waters with respect to jarosite....
Chemistry and origin of minor and trace elements in vitrinite concentrates from a rank series from the eastern United States, England, and Australia
P.C. Lyons, C.A. Palmer, N. H. Bostick, J.D. Fletcher, F.T. Dulong, F. W. Brown, Z. A. Brown, M.R. Krasnow, L.A. Romankiw
1989, International Journal of Coal Geology (13) 481-527
A rank series consisting of twelve vitrinite concentrates and companion whole-coal samples from mined coal beds in the eastern United States, England, and Australia were analyzed for C, H, N, O, ash, and 47 trace and minor elements by standard elemental,...
Recruitment failure in American avocets and black-necked stilts nesting at Kesterson Reservoir, California, 1984-1985
M.L. Williams, R. L. Hothem, H. M. Ohlendorf
1989, Condor (91) 797-802
We evaluated recruitment by American Avocets (Recurvirostra americana) and Black-necked Stilts (Himantopus mexicanus) in 1984 and 1985 at the selenium-contaminated Kesterson Reservoir and at a nearby reference site, the Volta Wildlife Area, both in western Merced County, California. Nests were monitored to determine their outcomes, including hatching success, and...
