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Page 5945, results 148601 - 148625

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Publication Extents

Not all publications have extents, not all extents are completely accurate
The stereoisomeric composition of phytanyl chains in lipids of Dead Sea sediments
R. Anderson, M. Kates, M.J. Baedecker, I.R. Kaplan, R.G. Ackman
1977, Geochimica et Cosmochimica Acta (41) 1381-1390
Lipid extracts from five recent Dead Sea sediments were analyzed for isoprenoid compounds and the following were isolated: free and phospholipid-bound di-O-phytanylglycerol, free phytanol and free and esterifled phytanic acid. The phytanyl groups of the diether and the free phytanol were oxidized to the corresponding phytanic acid; the stereoisomeric composition...
A note on the effect of fault gouge composition on the stability of frictional sliding
R. Summers, J. Byerlee
1977, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (14) 155-160
The frictional properties of fault gouge have been studied at confining pressures to 6 kbars. If the gouge is composed of strong materials such as crushed granite or quartz sand, the frictional strength is high, and violent stick-slip occurs at confining pressures above approximately 1.5 kbars. If the gouge is...
Investigation of detection limits for solutes in water measured by laser raman spectrometry
Kirkwood M. Cunningham, Marvin C. Goldberg, Eugene R. Weiner
1977, Analytical Chemistry (49) 70-75
The influence of experimental parameters on detection sensitivity was determined for laser Raman analysis of dissolved solutes in water. Individual solutions of nitrate, sulfate, carbonate, bicarbonate, monohydrogen phosphate, dihydrogen phosphate, acetate ion, and acetic acid were measured. An equation is derived which expresses the signal-to-noise ratio in terms of solute...
Long-term adequacy of metal resources
D.A. Singer
1977, Resources Policy (3) 127-133
Although the earth's crust contains vast quantities of metals, extraction technologies and associated costs are inextricably bound to three fundamental geological factors — the amount of metal available in the earth's crust in each range of grades, the mineralogical form and chemical state of the metal, and the spatial distribution...
Reactions of metal ions at surfaces of hydrous iron oxide
J.D. Hem
1977, Geochimica et Cosmochimica Acta (41) 527-538
Cu, Ag and Cr concentrations in natural water may be lowered by mild chemical reduction involving ferric hydroxide-ferrous ion redox processes. V and Mo solubilities may be controlled by precipitation of ferrous vanadate or molybdate. Concentrations as low as 10−8.00 or 10−9.00 M are readily attainable for all these metals in oxygen-depleted...
Moon-Mercury: Large impact structures, isostasy and average crustal viscosity
G. G. Schaber, J. M. Boyce, N.J. Trask
1977, Physics of the Earth and Planetary Interiors (15) 189-201
Thirty-five craters and basins larger than 200 km in diameter are recognized on the imaged portion (45%) of Mercury. If the unimaged portion of the planet is similarly cratered, a total of 78 such impact features may be present. Sixty-two craters and basins 200 km in diameter are recognized on...
Measured oxygen fugacities of the Angra dos Reis achondrite as a function of temperature
R. Brett, Huebner J. Stephen, M. Sato
1977, Earth and Planetary Science Letters (35) 363-368
Measurements of the oxygen fugacity (ƒO2) as a function of temperature (T) were made on an interior bulk sample of the cumulate achondrite, Angra dos Reis. Data clustered between theƒO2-T relationship of the iron-wüstite assemblage and 1.2 log atm units above iron-wüstite....
Effect of tax laws on mineral exploration in Canada
J.H. DeYoung Jr.
1977, Resources Policy (3) 96-107
Changes since 1972 in Canadian federal and provincial tax laws have eliminated many of the prior tax incentives offered to the mining industry. These changes provide an opportunity to study the effect of tax laws on a country's mineral resource development by comparing trends in mineral exploration in various provinces...
Geothermal reservoir temperatures estimated from the oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes
W.F. McKenzie, A.H. Truesdell
1977, Geothermics (5) 51-61
The oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes have been tested as a geothermometer in three areas of the western United States. Limited analyses of spring and borehole fluids and existing experimental rate studies suggest that dissolved sulfate and water are probably in...
Binorm-a fortran subroutine to calculate the percentiles of a standardized binormal distribution
R.B. McCammon
1977, Computers & Geosciences (3) 335-339
BINORM is a FORTRAN subroutine for calculating the percentiles of a standardized binormal distribution. By using a linear transformation, the percentiles of a binormal distribution can be obtained. The percentiles of a binormal distribution are useful for plotting purposes, for establishing confidence intervals, and for sampling from a mixed population...
An exploratory drilling exhaustion sequence plot program
J.H. Schuenemeyer, L.J. Drew
1977, Computers & Geosciences (3) 617-631
The exhaustion sequence plot program computes the conditional area of influence for wells in a specified rectangular region with respect to a fixed-size deposit. The deposit is represented by an ellipse whose size is chosen by the user. The area of influence may be displayed on computer printer plots consisting...
The display flight of The North American Ruddy Duck
M. R. Miller, R.M. McLandress, B.J. Gray
1977, The Auk (94) 140-142
Sexual behavior of the North American Ruddy Duck (Oxyura jamaicensis), as summarized by Johnsgard (1965: 323-327), includes a display variously referred to as the ringing rush (Johnsgard 1965: 325; 1967), ring rush (Johnsgard 1966), and/or display flight (Johnsgard 1966, 1967), which males perform as a short rush across the water...