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Page 6265, results 156601 - 156625

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Influence of radio packs on captive mallards and blue-winged teal
R. J. Greenwood, A.B. Sargeant
1973, Journal of Wildlife Management (37) 3-9
Back-mounted radio packs of three weights were attached to 30 captive mallards (Anas platyrhynchos) and 30 blue-winged teal (A. discors), and physical condition of the birds was evaluated for 12 weeks. All groups with radio packs lost more weight than did control groups. Feather wear often followed by skin irritation...
Fourth Lunar Science Conference
P. Bell, A. Burlingame, D. Burnett, L. Silver, S. Chang, D. Gault, P. Eberhardt, L. Haskin, O. James, J. Papike, G. Reed, N. Toksoz, J. Wood
1973, Science (181) 615-622
Relocation of crustal materials by cataclysmic impacts dominated the first 700 million years of lunar history....
Constitutive relations associated with the Mott-Smith distribution function
M. Nathenson, D. Baganoff
1973, Physics of Fluids (16) 2110-2115
It is shown that the distribution function assumed by Mott-Smith determines a unique relation between heat flux, stress, and fluid velocity given by q = (3/2)τu, i.e., it provides a constitutive relation for heat flux, and it also determines a simple expression for this ratio of third-order central moments Q...
Aspects of the magmatic geochemistry of bismuth
L. P. Greenland, D. Gottfried, E.Y. Campbell
1973, Geochimica et Cosmochimica Acta (37) 283-295
Bismuth has been determined in 74 rocks from a differentiated tholeiitic dolerite, two calc-alkaline batholith suites and in 66 mineral separates from one of the batholiths. Average bismuth contents, weighted for rock type, of the Great Lake (Tasmania) dolerite, the Southern California batholith...
A method to determine waterfowl shooting distances
D.A. Davenport, G.A. Sherwood, H. W. Murdy
1973, Wildlife Society Bulletin (1) 101-105
Long-range shooting at ducks and geese frequently results in a high crippling loss, unretrieved birds and frustrated hunters. A principal problem has been the general inability of hunters or observers to properly judge distance of birds. This paper describes a reasonably accurate method developed to determine shooting distances to geese....
Determination of gold in phosphates by activation analysis using epithermal neutrons
Jack J. Rowe
1973, Journal of Research of the U.S. Geological Survey (1) 79-80
A simple method is described for determining gold in phosphates and phosphatic materials. Samples in a cadmium container are irradiated with epithermal neutrons to minimize the formation of 32 P, while permitting the formation of adequate amounts of 198 Au.  Fire assay-radiochemical methods are used to separate the 198 Au.  Concentrations as low...
Floods in New York, 1971
F. Luman Robison
1973, Report
This report, for the calendar year 1971, was prepared at the request of the New York State Department of Transportation under provisions of an agreement between the New York State Department of Environmental Conservation and the U.S. Geological Survey fore a cooperative statewide program investigate the water resources of the...
Snowy owl predation on lapland longspur nestlings recorded on film
T. W. Custer
1973, The Auk (90) 433-435
 During the summer of 1971 I investigated the breeding biology of the Lapland Longspur, Calcarius lapponicus, near Barrow, Alaska. To obtain data on incubation and feeding patterns of nesting longspurs, time-lapse cameras (Minolta Autopak-8 D6 super-8 movie cameras equipped with an Intervalometer-P time-lapse device) were positioned at several nests throughout...
18O 16O ratios in cherts associated with the saline lake deposits of East Africa
J. R. O’Neil, R. L. Hay
1973, Earth and Planetary Science Letters (19) 257-266
The cherts formed from sodium silicate precursors in East African saline, alkaline lakes have δ18O values ranging from 31.1 to 44.1. The δ18O values correlate in general with lake salinities as inferred from geologic evidence, indicating that most chert was formed...
Statistical recognition of late Cretaceous cyclic sedimentation by means of calcareous nannofossil population studies
I.R. Mayers, T.R. Worsley
1973, Palaeogeography, Palaeoclimatology, Palaeoecology (13) 81-90
The relative abundance of calcareous nannofossil taxa in a sequence of samples collected from a continuous Upper Maastrichtian section in Alabama has been analyzed using statistical techniques. Results indicate that an increase of arbitrarily chosen long-ranging forms can be represented by a slowly...
K, Rb, Sr and 87Sr 86Sr in rocks from the Mid-Indian Oceanic Ridge
K.V. Subbarao, C. E. Hedge
1973, Earth and Planetary Science Letters (18) 223-228
The 87Sr/86Sr ratios of Mid-Indian Oceanic Ridge (MIOR) basalts are nearly identical (0.7032 to 0.7035), with the exception of one more highly radiogenic sample (0.7043). These values are consistently higher than the strontium isotopic ratios of the ridge basalts from Atlantic and...
Ultrafiltration by a compacted clay membrane-II. Sodium ion exclusion at various ionic strengths
B.B. Hanshaw, T.B. Coplen
1973, Geochimica et Cosmochimica Acta (37) 2311-2327
Several recent laboratory studies and field investigations have indicated that shales and compacted clay minerals behave as semipermeable membranes. One of the properties of semipermeable membranes is to retard or prevent the passage of charged ionic species through the membrane pores while allowing relatively free movement of uncharged species. This...
Stress changes ahead of an advancing tunnel
J.F. Abel, F. T. Lee
1973, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (10) 673-697
Instrumentation placed ahead of three model tunnels in the laboratory and ahead of a crosscut driven in a metamorphic rock mass detected stress changes several tunnel diameters ahead of the tunnel face. Stress changes were detected 4 diameters ahead of a model tunnel drilled into nearly elastic acrylic, 2·50 diameters...
Mariner 9-Image processing and products
E.C. Levinthal, W.B. Green, J.A. Cutts, E.D. Jahelka, R.A. Johansen, M.J. Sander, J.B. Seidman, A.T. Young, L.A. Soderblom
1973, Icarus (18) 75-101
The purpose of this paper is to describe the system for the display, processing, and production of image-data products created to support the Mariner 9 Television Experiment. Of necessity, the system was large in order to respond to the needs of a large team of scientists with a broad scope...
Changes in the visual pigments of trout
D.M. Allen, W.N. McFarland, F.W. Munz, H. A. Poston
1973, Canadian Journal of Zoology (51) 901-914
The proportions of two visual pigments (rhodopsin and porphyropsin) were examined in four species of trout under experimental and natural conditions. Brook trout (Salvelinus fontinalis), rainbow trout (Salmo gairdneri), and brown trout (Salmo trutta) have different relative proportions of visual pigments in their retinae. The visual pigment balance in wild...
87Sr/86Sr ratios in basalts from islands in the Indian Ocean
C. E. Hedge, N.D. Watkins, R.A. Hildreth, W. P. Doering
1973, Earth and Planetary Science Letters (21) 29-34
87Sr/86Sr ratios of basalts from islands in the Indian Ocean (0.7040) are higher than those of basalts dredged from the Mid-Indian Ocean Ridge (0.7034). The sources of the island basalts have apparently not been in equilibrium with the source of the...
Open-jaw syndrome in chinook salmon (Oncorhynchus tshawytscha) at a hatchery
Dennis E. Crouch, William T. Yasutake, Robert R. Rucker
1973, Journal of the Fisheries Research Board of Canada (30) 1890-1892
Nearly 0.5% of the yearling spring chinook salmon (Oncorhynchus tshawytscha) at a national fish hatchery were observed with mouth agape, the condition occurring in two of 16 ponds. X-radiographs and histological preparations indicated that the articular bone of the lower jaw was malformed and dislocated dorsal and posterior to its...