Carl W. Stover, J. H. Minsch, F. W. Baldwin, L. R. Brewer
1984, Circular 896-D
No abstract available....
Search Results
165549 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 4657, results 116401 - 116425
Publication Extents
Not all publications have extents, not all extents are completely accurateD. Best
1984, Redwood National Park 9
No abstract available at this time...
M.C. Hammond, Douglas H. Johnson
1984, Fish and Wildlife Technical Report 1
The present report quantifies relations between weather and several aspects of the breeding biology of four duck species: mallard (Anas platyrhynchos), gadwall (A. strepera), blue-winged teal (A. discors), and redhead (Aythya americana). Data were obtained from two locations in North Dakota,--the J. Clark Salyer National Wildlife Refuge, intermittently during 1936-68,...
J. B. McHugh
1984, Journal of Geochemical Exploration (20) 303-310
A method has been developed using electrothermal atomization to effectively determine the amount of gold in natural water within the nanogram range. The method has four basic steps: (1) evaporating a 1-L sample; (2) putting it in hydrobromic acid-bromine solution; (3) extracting the sample with methyl-isobutyl-ketone; and (4) determining the...
R. O. Rye, R. J. Roberts, W.S. Snyder, G.L. Lahusen, J.E. Motica
1984, Economic Geology (79) 124-140
The massive ore contains two major generations of pyrite, a fine and a coarse grained, both of which show a striking variety of textures involving quartz. Framboidal pyrite in the argillite host rock has delta 34 S values of approximately -24 per mil indicating the presence of a euxinic environment. The delta 34 S...
Kenneth E. Bencala
1984, Water Resources Research (20) 1804-1814
Solute transport in streams is determined by the interaction of physical and chemical processes. Data from an injection experiment for chloride and several cations indicate significant influence of solutestreambed processes on transport in a mountain stream. These data are interpreted in terms of transient storage processes for all tracers and...
J.G. Wiener, P.J. Rago, J.M. Eilers
G.R. Hendrey, editor(s)
1984, Book chapter, Early Biotic Responses to Advancing Lake Acidification. ACID-PRECIP.-SER. vol. 6
Fish communities in circumneutral Wisconsin lakes contained significantly more species than did those in acidic lakes (pH 5.1-6.0). Common, as well as rare, species occurred with lower frequency in acidic lakes than in circumneutral lakes. Certain taxa, such as minnows and darters, were either absent or rare in...
Terry L. Fries, Paul J Lamothe, J. J. Pesek
1984, Analytica Chimica Acta (159) 329-336
A sequential-scanning, inductively-coupled argon plasma emission spectrometer is used for the determination of the rare-earth elements, plus yttrium and scandium, in manganese nodules. Wavelength selection is optimized to minimize spectral interferences from manganese nodule components. Samples are decomposed with mixed acids in a sealed polycarbonate vessel, and elements are quantified...
R. K. Leininger, J.G. Hailer, N.R. Shaffer
1984, Conference Paper, Preprints
In the 1920's chemical and mineralogic characterization of the New Albany Shale (Mississippian-Devonian) in Indiana showed the dark shale to be rich in organic material and have commercial possibilities. Projects in the 1960's resulted in disparaging descriptions of exiguous fossil record, monotonous mineralogy, and intractable chemistry. Since 1978 expanded efforts...
David Clague, James Bischoff, David Howell
1984, Conference Paper, Oceans Conference Record (IEEE)
The Pacific Exclusive Economic Zone contains a variety of hard mineral resources. Sand and gravel and their associated placer deposits of heavy minerals are the most likely to be developed in the near future, but offshore and deep water deposits of phosphorite, abyssal manganese nodules, ferromanganese crusts enriched in cobalt,...
V. K. Dawson, G. A. Jackson, C. E. Korschgen
J.G. Wiener, R.V. Anderson, D.R. McConville, editor(s)
1984, Book chapter, Contaminants in the upper Mississippi River
Abstract not submitted to date...
L. L. Marking
L.L. Hoover, editor(s)
1984, Book chapter, Use of small fish in carcinogenicity testing
Abstract not submitted to date...
V. K. Dawson, G. A. Jackson, C. E. Korschgen
J.C. Wiener, R.V. Anderson, D.R. McConville, editor(s)
1984, Book chapter, Contaminants in the Upper Mississippi River
No abstract available....
R. J. Gilliom, R.M. Hirsch, E.J. Gilroy
1984, Environmental Science & Technology (18) 530-535
Monte Carlo experiments were used to evaluate whether trace-level water-quality data that are routinely censored (not reported) contain valuable information for trend detection. Measurements are commonly censored if they fall below a level associated with some minimum acceptable level of reliability (detection limit). Trace-level organic data were simulated with best-...
G. S. Gohn, R.E. Weems, S. F. Obermeier, R. L. Gelinas
1984, Open-File Report 84-670
No abstract available....
Robert I. Tilling
1984, Report
Ken Watson, Susanne Hummer-Miller
1984, Conference Paper
Thermal-inertia data, derived from the Heat Capacity Mapping Mission (HCMM) satellite, were analyzed in areas of varying amounts of vegetation cover. Thermal differences which appear to correlate with lithologic differences have been observed previously in areas of substantial vegetation cover. However, the energy exchange occurring within the canopy is much...
Gregory C. Lines
1984, Open-File Report 83-38
No abstract available....
M. E. Hinkle, C.A. Dilbert
1984, Journal of Geochemical Exploration (20) 323-336
Soil samples were collected over the North Silver Bell porphyry copper deposit near Tucson, Arizona. Volatile elements and compounds in gases derived from the soils and metallic elements in the soils were analyzed in order: (1) to see which volatile constituents of the soils might be indicative of the...
R. C. Severson, L. P. Gough
1984, Reclamation and Revegetation Research (3) 185-197
Plant uptake of Cd, Co, Cu, Fe, Mn, Ni, Pb and Zn from mine soils was assessed using alfalfa Medicago sativa, sainfoin Onobrychis viciaefolia, smooth brome Bromus inermis, crested wheatgrass Agropyron cristatum, slender wheatgrass A. trachycaulum and intermediate wheatgrass A. intermedium; mine soil (cover-soil and spoil material) samples were collected...
Gordon Whitney Weir, Warren Lee Peterson, W. C. Swadley, John Pojeta Jr.
1984, Professional Paper 1151-E
Ordovician formations above the Lexington Limestone crop out in the Blue Grass region of Kentucky and along the Cumberland River and its tributaries. The formations are all conformable and in places intertongue and intergrade. The major Ordovician units above the Lexington Limestone in the Blue Grass region are: The Clays...
L. L. Marking
G.M. Rand, S.R. Petrocelli, editor(s)
1984, Book chapter, Fundamentals of aquatic toxicology, methods and applications
Abstract not submitted to date...
Robert I. Tilling, Lyn J. Topinka, Donald A. Swanson
1984, Report
M. R. Miller, K. J. Reinecke
1984, Condor (86) 396-400
We review metabolizable energy (ME) concepts and present evidence suggesting that the form of ME used for analyses of avian energetics can affect interpretation of results. Apparent ME (AME) is the most widely used measure of food energy available to birds. True ME (TME) differs from AME in recognizing fecal...
Raymond P. Morgan II, D. W. Meritt, S. B. Block, M. Cole, S. T. Sulkin, Forrest B. Lee, Charles J. Henny
1984, Biochemical Systematics and Ecology (12) 119-123
From 1974 to 1976, a breeding program was used to produce hybrids of black ducks and mallards for the evaluation of inheritance patterns of serum proteins and serum, liver and muscle enzymes. In addition to the crosses designed to produce hybrids, a series of matings in 1975 and 1976 were...