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Page 6238, results 155926 - 155950

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Not all publications have extents, not all extents are completely accurate
Carnotite-bearing sandstone in Cedar Canyon, Slim Buttes, Harding County, South Dakota
James R. Gill, George W. Moore
1954, Trace Elements Investigations 411
Carnotite-bearing sandstone and clay have been found in the Chadron formation of the White River group of Oligocene age in the southern part of the Slim Buttes area, Harding County, S. Dak. Locally the mineralized sandstone contains as much as 0.23 percent uranium. The uranium and vanadium ions are believed...
Tables for evaluating Bateman equation coefficients for radioactivity calculations
F.J. Flanagan, F. E. Senftle
1954, Analytical Chemistry (26) 1595-1600
Tables of decay constants and functions thereof are presented to simplify the problem of calculating the constants involved in the Bateman equation. These tables make it possible to calculate any constant involved in any of the four radioactive series by a maximum of three mathematical operations, either by three divisions...
Polarographic determination of tungsten in rocks
L.E. Reichen
1954, Analytical Chemistry (26) 1302-1304
This work was undertaken to develop a simpler and faster method than the classical gravimetric procedure for the determination of tungsten in rocks and ores. A new polarographic wave of tungsten is obtained in a supporting electrolyte of dilute hydrochloric acid containing tartrate ion. This permits the determination of tungsten...
Spectrophotometric determination of uric acid and some redeterminations of its solubility
D. R. Norton, M. A. Plunkett, F. A. Richards
1954, Analytical Chemistry (26) 454-457
The present study was initiated in order to develop a rapid and accurate method for the determination of uric acid in fresh, brackish, and sea water. It was found that the spectrophotometric determination of uric acid based upon its reaction with arsenophosphotungstic acid reagent in the presence of cyanide ion...
Quantitative radiochemical method for determination of major sources of natural radioactivity in ores and minerals
J. N. Rosholt
1954, Analytical Chemistry (26) 1307-1311
When an ore sample contains radioactivity other than that attributable to the uranium series in equilibrium, a quantitative analysis of the other emitters must be made in order to determine the source of this activity. Thorium-232, radon-222, and lead-210 have been determined by isolation and subsequent activity analysis of some...
Thick target bremsstrahlung spectra for 1.00-, 1.25-, and 1.40-Mev electrons
W. Miller, J. W. Motz, C. Cialella
1954, Physical Review (96) 1344-1350
The spectrum of radiation produced by 1.0-, 1.25-, and 1.40-Mev electrons incident on a thick tungsten target was measured at 0° and 90° with the incident beam by a method involving the magnetic analysis of Compton electrons. The effects of electron scattering and energy loss in the target preclude any...
Studies of river morphology
Luna Bergere Leopold
1954, Science (119) 326-327
A number of generalizations concerning the behavior and natural characteristics of river channels have been developed by the U.S. Geological Survey in several recently completed studies of river morphology. Measurements of parameters such as the discharge, suspended load, bed material, velocity of flow, channel slope, and channel shape indicate that...
Stability of dilute solutions of uranium, lead, and thorium ions
R.G. Milkey
1954, Analytical Chemistry (26) 1800-1803
Standard solutions and samples containing a few micrograms of metallic ions per milliliter are frequently used in determination of trace elements. It is important to know whether the concentrations of such solutions remain constant from day to day. The stability of dilute solutions of three metallic ions-uranium, lead, and thorium-has...
A theoretical study of alpha star populations in loaded nuclear emulsions
F. E. Senftle, T. A. Farley, L. R. Stieff
1954, Geochimica et Cosmochimica Acta (6) 197-207
This theoretical study of the alpha star populations in loaded emulsions was undertaken in an effort to find a quantitative method for the analysis of less than microgram amounts of thorium in the presence of larger amounts of uranium. Analytical expressions for each type of star from each of the...
Composition of the continental plates
J. Gilluly
1954, Tschermaks Mineralogische und Petrographische Mitteilungen (4) 360-369
The structures of continental plates and of oceanic basins suggested by several seismologists are utilized to estimate the relative volumes of sial and sima in the earth's crust. It seems that sial of the composition of the average igneous rock constitutes fully 26% and perhaps as much as 43% of...
Double-chamber electrode for spectrochemical determination of chlorine and other halogens
L. H. Azevedo de Paiva, A. W. Specht, R. S. Harner
1954, Spectrochimica Acta (6) 331-333
A double-chamber, graphite electrode, suitable for d.c. arc determination of halogens by means of the alkaline earth halide bands, is described. An upper chamber holds the alkaline earth compound and an interconnected, lower chamber holds the halogen compound.This arrangement assures that there will be an abundance of alkaline earths in...
Geochemical work of the Geochemistry and Petrology Branch U.S. Geological Survey
E. Ingerson
1954, Geochimica et Cosmochimica Acta (5) 20-39
The current geochemical work of the Geochemistry and Petrology Branch of the U.S. Geological Survey is outlined under the headings of geochemical compilations, laboratory projects, and field-laboratory projects. Some thirty-seven active projects are described. Six others are mentioned which are planned for the near future. The importance and value of...
A chemical-spectrochemical method for the determination of rare earth elements and thorium in cerium minerals
H. J. Rose Jr., K. J. Murata, M. K. Carron
1954, Spectrochimica Acta (6) 161-168
In a combined chemical-spectrochemical procedure for quantitatively determining rare earth elements in cerium minerals, cerium is determined volumetrically, a total rare earths plus thoria precipitate is separated chemically, the ceria content of the precipitate is raised to 80·0 percent by adding pure ceria, and the resulting mixture is analyzed for...
Spectrochemical determination of thorium in monazite by the powder-d.c. arc technique
C. V. Dutra, K. J. Murata
1954, Spectrochimica Acta (6) 373-382
Thorium in monazite is determined by a d.c. carbon-arc technique using zirconium as the internal standard. The analytical curve for Th II 2870.413 Å/Zr II 2844-579 Å is established by means of synthetic standards containing graduated amounts of thoria and 0.500 per cent zirconia in pegmatite base (60 parts quartz,...