Zobrazeno 1 - 10
of 34
pro vyhledávání: '"David R. Schink"'
Publikováno v:
Environmental Science & Technology. 33:2536-2542
[sup 129]I/[sup 127]I ratios measured in meteoric water and epiphytes from the continental United States are higher than those measured in coastal seawater or surface freshwater and suggest long-range atmospheric transport of [sup 129]I from the main
Publikováno v:
Deep Sea Research Part I: Oceanographic Research Papers. 43:259-265
Two 129I profiles from the Middle Atlantic Bight were measured. Near-surface values of 129I127I were as high as 100 × 10−12; subsurface values peaked at 1000–1500 m depth (reaching 55 × 10−12) and showed a steady increase below 2000 m (reachi
Publikováno v:
Earth and Planetary Science Letters. 135:131-138
Nuclear weaponry and power generation have released far more 129 I onto the Earth's surface than was formerly present. The effects of this release are clearly visible in the waters of the Gulf of Mexico, far from the major sources. New 129 I is found
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 99:524-527
Natural levels of iodine 129 have been overwhelmed by a build-up of “new” iodine-129, a product of our nuclear age. Much of this new iodine-129 has entered the ocean and is now found in its upper layers. During primary production, marine organic
Publikováno v:
Environmental sciencetechnology. 17(1)
Publikováno v:
Deep Sea Research Part I: Oceanographic Research Papers
Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 1993, 40 (4), pp.849-865. ⟨10.1016/0967-0637(93)90075-E⟩
Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 1993, 40 (4), pp.849-865. ⟨10.1016/0967-0637(93)90075-E⟩
An in situ pump and six channel extraction system, operating typically at 351 min−1, can not only filter seawater samples but also extract dissolved Th, Pb and Ra isotopes from large volumes of seawater at six different depths on a single lowering.
Publikováno v:
AIP Conference Proceedings.
Redistribution of anthropogenic 129I from the main source area in the northeast Atlantic is by atmospheric and ocean current transport. While atmospherically-delivered 129I leached from the continent has raised ratios measured in rivers in the southe
Publikováno v:
Chinese Science Bulletin. 43:114-114
Autor:
Stephen T. Sweet, Norman L. Guinasso, Ian R. MacDonald, David R. Schink, Samantha B. Joye, Javier Alcalá-Herrera, Roger Sassen, A.G. Requejo, Debra A. DeFreitas
Publikováno v:
Geology. 26:851
Samples of thermogenic hydrocarbon gases, from vents and gas hydrate mounds within a sea-floor chemosynthetic community on the Gulf of Mexico continental slope at about 540 m depth, were collected by research submersible. The study area is characteri
Publikováno v:
Earth and Planetary Science Letters. 43:223-226
Laboratory experiments were conducted to determine the efficiency with which improved manganese-oxide-coated acrylic fibers extract radium, thorium, and actinium from seawater. Tests were made using surface seawater spiked with227Ac,227Th, and223Ra.