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Page 7029, results 175701 - 175725

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Publication Extents

Not all publications have extents, not all extents are completely accurate
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...
The nature of bacteria pathogenic to fish
P. J. Griffin
1954, Transactions of the American Fisheries Society (83) 241-253
A review is made of the progress in research on bacteria which are pathogenic to fish, with particular emphasis on those investigations performed during the past decade. The report includes a critical review of material published; the comments and suggestions are designed to stimulate the initiation of new research projects....
The flood control controversy: Big dams, little dams, and land management
Luna Bergere Leopold, Thomas Maddock Jr.
1954, Book
The purpose of this book is to investigate the facts regarding flood control, a subject that has given rise to extreme controversy in the United States in recent years. The question of flood control is obviously a vital one not only to the United States but to many other countries....
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...
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...
Relationship of length of fish to incidence of sea lamprey scars on white suckers, Catostomus commersoni, in Lake Huron
A.E. Hall, Oliver R. Elliott
1954, Copeia (1954) 73-74
During the course of experimental fishing operations conducted by the staff of Hammond Bay Fishery Laboratory (a field station of Great Lakes Fishery Investigations) in 1950-1951, length measurements and records of scarring incidence and number of scars per individual were obtained for a sample of 552 white suckers, Catostomus commersoni...
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,...
Fish furunculosis
S. F. Snieszko
1954, Progressive Fish-Culturist (16) 143
No abstract available....
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...
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 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...
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...
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...
Discussion of “expansion and increase in permeability of carbonate rocks on heating”
Clifford A. Kaye, John C. Maxwell, Peter Verrall
1953, Eos, Transactions, American Geophysical Union (34) 953-954
Maxwell and Verrall's interesting study raises a thought. If limestones expand on heating and thereby receive a permanent set, as this paper demonstrates, do we not have here a means of determining the maximum temperature to which a particular limestone was ever subjected and indirectly thereby its maximum depth of...