Movements of adult lake trout in Lake Superior
Jerold F. Rahrer
1968, Transactions of the American Fisheries Society (97) 481-484
Returns from mature lake trout (Salvelinus namaycush) tagged in western Lake Superior in 1959 and 1962-65 described here suggest that trout disperse widely from the spawning grounds after spawning and return in subsequent years. Although the data were not extensive, returns from lake trout tagged near Keweenaw Point in 1950...
Comparative embryology of five species of lampreys of the upper Great Lakes
Allen J. Smith, John H. Howell, George W. Piavis
1968, Copeia (1968) 461-469
The four species of lampreys native to the upper Great Lakes (American brook lamprey, Lampetra lamotteni; chestnut lamprey, Ichthyomyzon castaneus; northern brook lamprey, I. fossor; and silver lamprey, I. unicuspis) were collected in various stages of their life cycle and maintained in the laboratory until sexually mature. Secondary sex characters...
Alaska Railroad Terminal Reserve, Anchorage, soil-stability study: Stability in the vicinity of boring lines 1 and 2
David J. Varnes
1968, Open-File Report 68-310
This report has been prepared in response to a request dated April 22, 1966, from the General Manager of The Alaska Railroad to the Director, U.S. Geological Survey, for an evaluation of the propriety of continued industrial expansion on land contained within The Alaska Railroad Terminal Reserve and nearby. It...
Runoff from an asphalt-treated watershed at White Sands Missile Range, New Mexico
W. C. Ballance, J.A. Basler, J.E. McCall
1968, Conference Paper, Preprints
[No abstract available]...
Effects of selective fusion on the thermal history of the earth's mantle
W.H.K. Lee
1968, Earth and Planetary Science Letters (4) 270-276
A comparative study on the thermal history of the earth's mantle was made by numerical solutions of the heat equation including and excluding selective fusion of silicates. Selective fusion was approximated by melting in a multicomponent system and redistribution of radioactive elements. Effects of selective fusion on the thermal models...
Nuclear magnetic resonance studies of the phosphorus(v) pesticides: A rapid determination of the isomer ratio of systox
H. Babad, T.N. Taylor, M. C. Goldberg
1968, Analytica Chimica Acta (40) 387-392
The integration circuit of the Varian A-60 nuclear magnetic resonance spectrometer is used in conjunction with vapor phase chromatography, to develop a rapid analysis technique for the determination of isomer ratios in technical Systox-Sulfotepp mixtures. The complete analysis requires less than 0.1 g of sample...
Isotope studies of dolomite formation under sedimentary conditions
R.N. Clayton, B.F. Jones
1968, Geochimica et Cosmochimica Acta (32)
Measurements of stable isotope abundances of the carbonate portion of the sediment in Deep Springs Lake, California, indicate the presence of at least three phases: a magnesian calcite, a primary sedimentary dolomite, and a detrital dolomite. The former two have isotopic compositions consistent with precipitation at isotopic equilibrium from waters...
Pre-gilbertian conceptions of terrestrial magnetism
P.J. Smith
1968, Tectonophysics (6) 499-510
It is now well known that William Gilbert, in his De Magnete of 1600, first suggested that the earth behaves as a great magnet. By their very nature, however, such explicit statements tend, in retrospect, to be emphasised at the expense of less explicit antecedent ideas and experiments, with the result that,...
Determination of palladium, platinum and rhodium in geologic materials by fire assay and emission spectrography
J. Hapfty, L.B. Riley
1968, Talanta (15) 111-117
A method is described for the determination of palladium down to 4ppb (parts per billion, 109), platinum down to 10 ppb and rhodium down to 5 ppb in 15 g of sample. Fire-assay techniques are used to preconcentrate the platinum metals into a gold bead, then...
Ground-water discharge from the Edwards and associated limestones, San Antonio area, Texas, 1967
Paul Rettman
1968, Edwards Underground Water District Bulletin 17
No abstracts available....
Records of precipitation, aquifer head, and ground-water recharge to the Edwards and associated limestones, San Antonio area, Texas, 1967
Paul Rettman
1968, Edwards Underground Water District Bulletin 18
No abstracts available....
Determination of gold in rocks by neutron activation analysis using fire-assay preconcentration
F.O. Simon, Hugh T. Millard Jr.
1968, Analytical Chemistry (40) 1150-1152
No abstract available....
Infectious pancreatic necrosis: Selection of virus-free stock from a population of carrier trout
K. Wolf, M. C. Quimby, C. P. Carlson, G. L. Bullock
1968, Journal of the Fisheries Research Board of Canada (25) 383-391
Infectious pancreatic necrosis (IPN) is a virulent disease of young trouts and is easily transmitted from infected animals through water and with eggs. At present, the most effective control measure consists of propagation of specific pathogen-free stock. Methods are described for using fish cell cultures to detect IPN virus in...
Surface area of montmorillonite from the dynamic sorption of nitrogen and carbon dioxide
Josephus Thomas Jr., Bruce F. Bohor
1968, Clays and Clay Minerals (16) 83-91
Surface area determinations were made on a montmorillonite with various cations emplaced on the exchangeable sites, utilizing nitrogen and carbon dioxide as adsorbates at 77°K and 195°K, respectively, in a dynamic system. From the fraction of a Mississippi montmorillonite less than about 1 μ in size, samples were prepared by replacing...
Tree leaf control on low flow water quality in a small Virginia stream
K. V. Slack, H.R. Feltz
1968, Environmental Science & Technology (2) 126-131
No abstract available....
Dissociation constants of KSO4- from 10°-50°C
A.H. Truesdell, P. B. Hostetler
1968, Geochimica et Cosmochimica Acta (32) 1019-1022
A cell without liquid junction was used to obtain dissociation constants for the reaction: KSO4− = K+ +SO42−. At 10°, 25°, 38° and 50°C, values for Kdiss KSO4− are, respectively, 0.195, 0.142, 0.117, and 0.095. At 25°C, , and <img class="imgLazyJSB inlineImage" title=""...
Variation of Nb-Ta, Zr-Hf, Th-U and K-Cs in two diabase-granophyre suites
D. Gottfried, L. P. Greenland, E.Y. Campbell
1968, Geochimica et Cosmochimica Acta (32) 925-947
Concentrations of Nb, Ta, Zr, Hf, Th, U and Cs have been determined in samples of igneous rocks representing the diabase-granophyre suites from Dillsburg, Pennsylvania, and Great Lake, Tasmania.Niobium and tantalum have a three to fourfold increase with differentiation in each of the suites. The chilled margin of the Great...
Water sample filtration unit
M. W. Skougstad, G.F. Scarbro Jr.
1968, Environmental Science & Technology (2) 298-301
No abstract available....
Structural charge site influence on the interlayer hydration of expandable three-sheet clay minerals
Raymond L. Kerns Jr., Charles J. Mankin
1968, Clays and Clay Minerals (16) 73-81
Previous investigations have demonstrated the influences of interlayer cation composition, relative humidity, temperature, and magnitude of interlayer surface charge on the interlayer hydration of montmorillonites and vermiculites. It has been suggested that the sites of layer charge deficiencies may also have an influence upon the amount of hydration that can...
SrRbK and Sr isotopic relationships in ultramafic rocks, southeastern Alaska
M. A. Lanphere
1968, Earth and Planetary Science Letters (4) 185-190
Geologic evidence suggests that a series of ultramafic complexes of the ‘Duke Island type’ located along a 560 km-long belt in southeastern Alaska crystallized from magmas of ultramafic composition. Some geologists have proposed that these magmas were derived by fractional fusion of...
The relationship of geophysical measurements to engineering and construction parameters in the Straight Creek Tunnel pilot bore, Colorado
J. H. Scott, F. T. Lee, R. D. Carroll, C. S. Robinson
1968, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (5) 1-30
Seismic-refraction and electrical-resistivity measurements made along the walls of the Straight Creek Tunnel pilot bore indicate that both a low-velocity and a high-resistivity layer exist in the disturbed rock surrounding the excavation. Seismic measurements were analyzed to obtain the thickness and seismic velocity...
The oxidation of drugs by fishes
Donald R. Buhler, Mary E. Rasmusson
1968, Comparative Biochemistry and Physiology, Part A: Molecular & Integrative Physiology (25) 223-239
1. Fish liver microsomal systems have been found to catalyze the hydroxylation of aniline and acetanilide, the N-demethylation of aminopyrine and the O-dealkylation of phenacetin.2. These systems are similar to the corresponding mammalian enzymes and they may be considered to be mixed function oxidase since they require NADPH and...
Role of intestinal microflora in the degradation of DDT by rainbow trout (Salmo gairdneri)
Gary Wedemeyer
1968, Life Sciences (7) 219-233
Though liver homogenates show apparent microsomal enzyme DDT-dehydrochlorinase activity, in the intact fish the intestinal microflora play a major role in DDT detoxication. Since the presence of this microflora in fish depends on the recent intake of food (12), the rate of detoxication and hence the toxicity of ingested DDT...
Some effects of mirex on two warm-water fishes
Charles C. Van Valin, Austin K. Andrews, Lafayette L. Eller
1968, Transactions of the American Fisheries Society (97) 185-196
The effects of mirex on two species of warm-water fishes were studied in three experiments in which the fish were exposed either by feeding a mirex-treated diet, or by treating the holding ponds with a mirex formulation. Bluegills were used in the feeding experiment, where three different levels of mirex...
The relative toxicities of several pesticides to naiads of three species of stoneflies
Herman O. Sanders, Oliver B. Cope
1968, Limnology and Oceanography (13) 112-117
Static bioassays were conducted to determine the relative acute toxicities of some insecticides, herbicides, fungicides, a defoliant, and a molluscicide to the naiads of three species of stonef!y, Pteronarcys califomica, Pteronarcella badia, and Claassenia sabulosa. Toxic effects were measured by determination of median lethal concn (Lcoo) for 24-, 48-, and...
