992 resultados para 505


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Definição, pela Assembleia Nacional Constituinte, das competências do Supremo Tribunal Federal. Discussão da proposta de proibição da propaganda de cigarros em veículos de comunicação de massa. Defesa, pelos Constituintes não fumantes, da proibição do fumo no plenário.

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Whether bilateral total extraperitoneal (TEP) inguinal hernia repair is associated with worse outcomes than unilateral TEP continues to be a matter of debate. This study aimed to compare different outcomes of large cohorts of patients undergoing bilateral versus unilateral TEP.

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veröffentlicht in: Arthur Hübscher (Hrsg), Arthur Schopenhauer Gesammelte Briefe, Bonn 1978, Nr. 16

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Briefwechsel und Beilagen zwischen Max Horkheimer, Theodor W. und Gretel Adorno, 1945; 1 Brief von Gretel Adorno an Frederick Wild, 1945; 1 Brief von Theodor W. Adorno an Leo Löwenthal, 1945; Briefwechsel zwischen Theodor W. Adorno und John Slawson, 1945; 1 Brief von Else Frenkel-Brunswick an Theodor W. Adorno, 1944; 2 Briefe von Gretel Adorno an Margot von Mendelssohn, 1945; Briefwechsel und Beilagen zwischen Max Horkheimer und Theodor W. und Gretel Adorno, 1946 - 1948; 1 Brief von Theodor W. Adorno an Ralph L. Beals, 1948; Briefwechsel zwischen Gretel Adorno und Frederick Wild, 1946 - 1947;

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Verlag Keller, Abrechnung, Friedrich Stoltze II, Nachrichten aus Frankfurt, Jakob Stern, Marie Stoltze

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Vorbesitzer: Gustav Freytag

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Two sites on the southern flank of the Costa Rica Rift were drilled on DSDP Legs 68 and 69, one on crust 3.9 m.y. old and the other on crust 5.9 m.y. old. The basement of the younger site is effectively cooled by the circulation of seawater. The basement of the older site has been sealed by sediment, and an interval in the uppermost 560 meters of basement recently reheated to temperatures of 60 to 120°C. Although the thickness of the sediments at the two sites is similar (150-240 m versus 270 m), the much rougher basement topography at the younger Site 505 produces occasional basement outcrops, through which 80 to 90% of the total heat loss apparently occurs by advection of warm seawater. This seawater has been heated only slightly, however; the temperature at the base of the sediments is only 9°C. Changes in its composition due to reaction with the basement basalts are negligible, as indicated by profiles of sediment pore water chemistry. Bacterial sulfate reduction in the sediments produces a decrease in SO4 (and Ca) and an increase in alkalinity (and Sr and NH3) as depth increases to an intermediate level, but at deeper levels these trends reverse, and all of these species plus Mg, K, Na, and chlorinity approach seawater values near basement. Si, however, is higher, and Li may be lower. At the older site, Site 501/504, where heat loss is entirely by conduction, the temperature at the sediment/basement contact is 59°C. Sediment pore water chemistry is heavily affected by reaction with the basaltic basement, as indicated by large decreases in d18O, Mg, alkalinity, Na, and K and an increase in Ca with increasing depth. The size of the changes in d18O, Mg, alkalinity, Ca, Sr, and SO4 varies laterally over 500 meters, indicating lateral gradients in pore water chemistry that are nearly as large as the vertical gradients. The lateral gradients are believed to result from similar lateral gradients in the composition of the basement formation water, which propagate upward through the sediments by diffusion. A model of the d18O profile suggests that the basement at Site 501/504 was sealed off from advection about 1 m.y. ago, so that reaction rates began to dominate the basement pore water chemistry. A limestone-chert diagenetic front began to move upward through the lower sediments less than 200,000 yr. ago.

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We discuss the provenance of minerals detected by X-ray-diffraction analyses of sediments of Sites 504 and 505 of Deep Sea Drilling Project Leg 69. These are X-ray-amorphous material, opal-CT, calcite, quartz, feldspar, apatite, smectite, illite, kaolinite, magnetite, maghemite, pyrite, marcasite, barite, sepiolite, and clinoptilolite. Authigenic marcasite and clinoptilolite together with opal-CT are restricted to Site 504, indicating the special diagenetic conditions related to relatively high sediment temperatures at this site. Marcasite formation is likely dependent on the relatively low pH values of <7.1 found in interstitial waters of Site 504 sediments below 50 meters sub-bottom. Clinoptilolite evidently was formed by diagenetic alteration of rhyolitic volcanic glass or smectite plus biogenic silica within the chalk-limestone-chert sequence of Site 504, where opal-CT also reflects a high degree of silica dissolution and reprecipitation. This was a consequence of high temperatures (50-55 °C) at the base of the sediment column.