Zobrazeno 1 - 10
of 77
pro vyhledávání: '"WILLIAM M. SACKETT"'
Autor:
William M. Sackett
Publikováno v:
Annals of the New York Academy of Sciences. 119:339-346
In situ determination of the accumulation rate of cosmic dust in the earth is difficult because of the large amount of wind-transported continental-derived material in the atmosphere and water-transported continental-derived material in the ocean. On
Publikováno v:
Marine Mammal Science. 12:555-563
The sloughed skin from three captive manatees at Lowry Park Zoological Garden (Tampa, Florida) was examined over a period of one year to determine its stable carbon isotopic composition (δ13C). The food consumed by these manatees in a controlled die
Autor:
Kitack Lee, William M. Sackett
Publikováno v:
Deep Sea Research Part I: Oceanographic Research Papers. 45:1015-1028
A new method has been developed for measuring biogenic silica (amorphous) in marine sediments. It is based on the Hogbom–Urey reaction CaCO 3 + SiO 2 ( biogenic silica )→ CaSiO 3 ( wollastonite )+ CO 2 . The reaction is carried out in evacuated s
Autor:
William M. Sackett, M.E. Conkright
Publikováno v:
Geochimica et Cosmochimica Acta. 61:1941-1952
Thirty years of research are brought together into one coherent summary of carbon and hydrogen isotope effects during the thermocatalytic production of methane from model compounds, petroleum, source rocks, and coals. The approach used by the authors
Autor:
William M. Sackett
Publikováno v:
Organic Geochemistry. 23:403-406
Half-times for the thermal decomposition of methane are 108, 34 and 4 h, respectively, for 800, 900 and 1000°C. This demonstrated stability of methane and the non-exchangibility of its carbon isotopes with CO 2 at 700°C lends credibility to the pyr
Autor:
Michael J. Durako, William M. Sackett
Publikováno v:
Journal of Experimental Marine Biology and Ecology. 169:167-180
The effects of free CO 2 (CO 2(aq) ) on photosynthetic carbon isotopic fractionation of the seagrass Thalassia testudinum Banks ex Konig were examined using four marine mesocosms at the University of Rhode Island Marine Ecosystems Research Laboratory
Publikováno v:
Global Biogeochemical Cycles. 6:125-138
Stable hydrogen (δD) and carbon (δ13C) isotope ratios of sedimentary methane from five subtropical Florida freshwater sites exhibited smaller, less distinct seasonal variations than previously observed in temperate sediments, apparently due to the
Autor:
Brian A. Nault, Amanda C. Bachmann, Denis A. Shah, Kathryn E. Straight, F. E. Gildow, William M. Sackett, H. R. Dillard, Shelby J. Fleischer
Publikováno v:
Environmental entomology. 38(5)
Cucumber mosaic virus (CMV) has become a major limiting factor in snap bean production in the Great Lakes region of North America, and epidemics have occurred more frequently since the soybean aphid, Aphis glycines Matsumura, was introduced. Major ap
Autor:
William M. Sackett
Publikováno v:
Marine Chemistry. 34:153-156
Autor:
William M. Sackett
Publikováno v:
Organic Geochemistry. 20:43-45
A time series pyrolysis experiment was performed on a Bakken oil shale sample at 700°C. CaO was used to eliminate CO2 and thus minimize potential carbon isotope exchange with methane. The δ13C of the product methane approaches to within a few tenth