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  • American Association for the Advancement of Science (AAAS)  (5)
  • 1990-1994  (5)
  • 1950-1954
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  • 1
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    A mantle plume initiation model for the wrangellia flood basalt and other oceanic plateaus (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-10-11
    Description: The vast Wrangellia terrane of Alaska and British Columbia is an accreted oceanic plateau with Triassic strata that contain a 3- to 6-kilometers thick flood basalt, bounded above and below by marine sedimentary rocks. This enormous outpouring of basalt was preceded by rapid uplift and was followed by gradual subsidence of the plateau. The uplift and basalt eruptions occurred in less than approximately 5 million years, and were not accompanied by significant extension or rifting of the lithosphere. This sequence of events is predicted by a mantle plume initiation, or plume head, model that has recently been developed to explain continental flood volcanism. Evidence suggests that other large oceanic basalt plateaus, such as the Ontong-Java, Kerguelen, and Caribbean, were formed as the initial outbursts of the Louisville Ridge, Kerguelen, and Galapagos hot spots, respectively. Such events may play an important role in the creation and development of both oceanic and continental crust.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Richards, M A -- Jones, D L -- Duncan, R A -- Depaolo, D J -- New York, N.Y. -- Science. 1991 Oct 11;254(5029):263-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17787974" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    The potential for ozone depletion in the arctic polar stratosphere (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-31
    Description: The nature of the Arctic polar stratosphere is observed to be similar in many respects to that of the Antarctic polar stratosphere, where an ozone hole has been identified. Most of the available chlorine (HCl and ClONO(2)) was converted by reactions on polar stratospheric clouds to reactive ClO and Cl(2)O(2) throughout the Arctic polar vortex before midwinter. Reactive nitrogen was converted to HNO(3), and some, with spatial inhomogeneity, fell out of the stratosphere. These chemical changes ensured characteristic ozone losses of 10 to 15% at altitudes inside the polar vortex where polar stratospheric clouds had occurred. These local losses can translate into 5 to 8% losses in the vertical column abundance of ozone. As the amount of stratospheric chlorine inevitably increases by 50% over the next two decades, ozone losses recognizable as an ozone hole may well appear.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brune, W H -- Anderson, J G -- Toohey, D W -- Fahey, D W -- Kawa, S R -- Jones, R L -- McKenna, D S -- Poole, L R -- New York, N.Y. -- Science. 1991 May 31;252(5010):1260-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17842951" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Near-field investigations of the landers earthquake sequence, april to july 1992 (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-04-09
    Description: The Landers earthquake, which had a moment magnitude (M(w)) of 7.3, was the largest earthquake to strike the contiguous United States in 40 years. This earthquake resulted from the rupture of five major and many minor right-lateral faults near the southern end of the eastern California shear zone, just north of the San Andreas fault. Its M(w) 6.1 preshock and M(w) 6.2 aftershock had their own aftershocks and foreshocks. Surficial geological observations are consistent with local and far-field seismologic observations of the earthquake. Large surficial offsets (as great as 6 meters) and a relatively short rupture length (85 kilometers) are consistent with seismological calculations of a high stress drop (200 bars), which is in turn consistent with an apparently long recurrence interval for these faults.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sieh, K -- Jones, L -- Hauksson, E -- Hudnut, K -- Eberhart-Phillips, D -- Heaton, T -- Hough, S -- Hutton, K -- Kanamori, H -- Lilje, A -- Lindvall, S -- McGill, S F -- Mori, J -- Rubin, C -- Spotila, J A -- Stock, J -- Thio, H K -- Treiman, J -- Wernicke, B -- Zachariasen, J -- New York, N.Y. -- Science. 1993 Apr 9;260(5105):171-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17807175" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Involvement of platelet-endothelial cell adhesion molecule-1 in neutrophil recruitment in vivo (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-12-03
    Description: During inflammation, neutrophils migrate from the vascular lumen into extravascular sites. In vitro assays have suggested that platelet-endothelial cell adhesion molecule-1 [PECAM-1 (CD31)], a member of the immunoglobulin superfamily, is required for the transmigration of neutrophils across endothelial monolayers. Antibody to human PECAM-1, which cross-reacts with rat PECAM-1, was found to block not only in vivo accumulation of rat neutrophils into the peritoneal cavity and the alveolar compartment of the lung but also neutrophil accumulation in human skin grafts transplanted onto immunodeficient mice. On the basis of these findings in three different models of inflammation, it appears that PECAM-1 is required for neutrophil transmigration in vivo and may thus be a potential therapeutic target.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vaporciyan, A A -- DeLisser, H M -- Yan, H C -- Mendiguren, I I -- Thom, S R -- Jones, M L -- Ward, P A -- Albelda, S M -- HL-31963/HL/NHLBI NIH HHS/ -- HL-430020-02/HL/NHLBI NIH HHS/ -- HL-46311/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1993 Dec 3;262(5139):1580-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, University of Michigan Medical School, Ann Arbor 48109.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8248808" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/pharmacology ; Antigens, CD31 ; Antigens, Differentiation, Myelomonocytic/immunology/*physiology ; Cell Adhesion Molecules/immunology/*physiology ; Cell Movement/physiology ; Chemotaxis, Leukocyte/physiology ; Endothelium/immunology ; Humans ; Immune Complex Diseases/immunology ; Membrane Glycoproteins/immunology/*physiology ; Mice ; Mice, SCID ; Neutrophils/*physiology ; Peritoneal Cavity/cytology ; Rats ; Skin Transplantation/immunology ; Transplantation, Heterologous/immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Seismicity remotely triggered by the magnitude 7.3 landers, california, earthquake (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-06-11
    Description: The magnitude 7.3 Landers earthquake of 28 June 1992 triggered a remarkably sudden and widespread increase in earthquake activity across much of the western United States. The triggered earthquakes, which occurred at distances up to 1250 kilometers (17 source dimensions) from the Landers mainshock, were confined to areas of persistent seismicity and strike-slip to normal faulting. Many of the triggered areas also are sites of geothermal and recent volcanic activity. Static stress changes calculated for elastic models of the earthquake appear to be too small to have caused the triggering. The most promising explanations involve nonlinear interactions between large dynamic strains accompanying seismic waves from the mainshock and crustal fluids (perhaps including crustal magma).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hill, D P -- Reasenberg, P A -- Michael, A -- Arabaz, W J -- Beroza, G -- Brumbaugh, D -- Brune, J N -- Castro, R -- Davis, S -- Depolo, D -- Ellsworth, W L -- Gomberg, J -- Harmsen, S -- House, L -- Jackson, S M -- Johnston, M J -- Jones, L -- Keller, R -- Malone, S -- Munguia, L -- Nava, S -- Pechmann, J C -- Sanford, A -- Simpson, R W -- Smith, R B -- Stark, M -- Stickney, M -- Vidal, A -- Walter, S -- Wong, V -- Zollweg, J -- New York, N.Y. -- Science. 1993 Jun 11;260(5114):1617-23.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17810202" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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