976 resultados para Ccr5 Delta-32
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M. Nemirowski
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Emanuel Kirschner
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The oxygen isotopic composition and Mg/Ca ratios in the skeletons of long-lived coralline algae record ambient seawater temperature over time. Similarly, the carbon isotopic composition in the skeletons record delta(13)C values of ambient seawater dissolved inorganic carbon. Here, we measured delta(13)C in the coralline alga Clathromorphum nereostratum to test the feasibility of reconstructing the intrusion of anthropogenic CO(2) into the northern North Pacific Ocean and Bering Sea. The delta(13)C was measured in the high Mgcalcite skeleton of three C. nereostratum specimens from two islands 500 km apart in the Aleutian archipelago. In the records spanning 1887 to 2003, the average decadal rate of decline in delta(13)C values increased from 0.03% yr(-1) in the 1960s to 0.095% yr(-1) in the 1990s, which was higher than expected due to solely the delta(13)C-Suess effect. Deeper water in this region exhibits higher concentrations of CO(2) and low delta(13)C values. Transport of deeper water into surface water (i.e., upwelling) increases when the Aleutian Low is intensified. We hypothesized that the acceleration of the delta(13)C decline may result from increased upwelling from the 1960s to 1990s, which in turn was driven by increased intensity of the Aleutian Low. Detrended delta(13)C records also varied on 4-7 year and bidecadal timescales supporting an atmospheric teleconnection of tropical climate patterns to the northern North Pacific Ocean and Bering Sea manifested as changes in upwelling.
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A number of tight urinary epithelia, as exemplified by the turtle bladder, acidify the luminal solution by active transport of H+ across the luminal cell membrane. The rate of active H+ transport (JH) decreases as the electrochemical potential difference for H+ [delta mu H = mu H(lumen) - mu H(serosa)] across the epithelium is increased. The luminal cell membrane has a low permeability for H+ equivalents and a high electrical resistance compared with the basolateral cell membrane. Changes in JH thus reflect changes in active H+ transport across the luminal membrane. To examine the control of JH by delta mu H in the turtle bladder, transepithelial electrical potential differences (delta psi) were imposed at constant acid-base conditions or the luminal pH was varied at delta psi = 0 and constant serosal PCO2 and pH. When the luminal compartment was acidified from pH 7 to 4 or was made electrically positive, JH decreased as a linear function of delta mu H as previously described. When the luminal compartment was made alkaline from pH 7 to 9 or was made electrically negative, JH reached a maximal value, which was the same whether the delta mu H was imposed as a delta pH or a delta psi. The nonlinear JH vs. delta mu H relation does not result from changes in the number of pumps in the luminal membrane or from changes in the intracellular pH, but is a characteristic of the H+ pumps themselves. We propose a general scheme, which, because of its structural features, can account for the nonlinearity of the JH vs. delta mu H relations and, more specifically, for the kinetic equivalence of the effects of the chemical and electrical components of delta mu H. According to this model, the pump complex consists of two components: a catalytic unit at the cytoplasmic side of the luminal membrane, which mediates the ATP-driven H+ translocation, and a transmembrane channel, which mediates the transfer of H+ from the catalytic unit to the luminal solution. These two components may be linked through a buffer compartment for H+ (an antechamber).
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Trägerband: Inc. oct. 361; Vorbesitzer: Dominikanerkloster Frankfurt am Main
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Vorbesitzer: Bartholomaeusstift Frankfurt am Main
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Vorbesitzer: Philipp Dieffenbach
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Vorbesitzer: GWR; Heinrich Karl Ferdinand Flinsch
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Vorbesitzer: Dominikanerkloster Frankfurt am Main
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u.a.: Wertverlust in Danzig liegenden Güter wegen Ausbruch der Cholera;
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6 Briefe zwischen E. Lederer und Max Horkheimer, 1936-1939; 1 Brief von Theodor W. Adorno an Minna Ledermann, 26.04.1941; 1 Brief von W. W. Lee an Max Horkheimer, 15.11.1938; 69 Brief zwischen Berta Lehmann, Flora Lehmann an Max Horkheimer, 1939-1944; 2 Briefe von Berta Lehmann, Flora Lehmann an Juliette Favez, März 1939; 1 Brief vom Reisebüro Anselm Stuttgart an Max Horkheimer, 02.04.1941; 4 Briefe zwischen der Auswandererstelle Marx Stuttgart und Max Horkheimer, 28.11.1940, 1941; 1 Brief von Max Horkheimer an Karl Adler, 24.01.1941; 2 Briefe von Max Horkheimer an Walter C. Louchheim, 1940; 5 Briefe zwischen dem American Consul General Stuttgart und Max Horkheimer, 1939-23.11.1940; 4 Brief zwischen der Auswandererstelle Adler Stuttgart und Max Horkheimer, 1940; 2 Briefe zwischen der Auswandererstelle Stuttgart und Max Horkheimer, 20.02.1940; 5 Briefe zwischen N. C. Leites und Max Horkheimer, 17.05.1937, 1937; 4 Briefe zwischen Irmgard Lenel und Max Horkheimer, 1941, 1942; 3 Briefe zwischen Heidi Lenssen und Max Horkheimer, 01.02.1937, 1937; 3 Briefe zwischen Theo F. Lentz und Max Horkheimer, 05.07.1945, 1945; 11 Briefe zwischen Jella Lepman und Max Horkheimer,1939-1941; 2 Briefe von Max Horkheimer an das American Consul General London, 1941; 1 Brief von R. Leppla an Max Horkheimer, 21.06.1948; 7 Briefe zwischen Max Lerner und Max Horkheimer, 1941, 1942; 5 Briefe und Beilagen zwischen Adolf Laschnitzer und Max Horkheimer, 1939-1940; 2 Briefe ziwschen dem The Emergency Committee in Aid of Displaced Foreign Scholars, New York und Max Horkheimer, 23.110.1940, 07.11.1940; 3 Briefe und 1 Beilage zwischen Andrée Lespiaut und Max Horkheimer, 13.11.1948; 1 Brief von Max Horkheimer an A. Lesser, 21.05.1935; 1 Brief von Bobby Level und Frank Level an Max Horkheimer, 20.07.1949; 1 Brief von Julius Walter Levi an Max Horkheimer, 15.05.1940; 1 Brief von Bernhard W. Levmore an Leo Löwenthal, 13.08.1940; 3 Briefe von Margot von Mendelssohn an Bernhard W. Levmore, 1940; 3 Briefe zwischen Ernst Levy und Max Horkheimer, 21.05.1927, 1937; 1 Brief von Erwin Levy an Max Horkheimer, 23.03.1935; 17 Briefe zwsichen Hanna Levy und Max Horkheimer, Friedrich Pollock, 1936-1937; 6 Briefe zwischen Herbert Levy und Friedichpollock, 1939-1940; 1 Brief von Friedrich Pollock an Heinz Langerhans, 11.08.1939; 2 Briefe von Max Horkheimer an die Society of the Protection of Science and Learning, The Scott Polar Research Institut, Cambridge, England, 24.11.1939; 2 Briefe zwischen Marie Levy und Max Horkheimer, 18.12.1938, 03.08.1939; 10 Briefe und 1 Beilage zwischen Max Lexandrowitz, Magarete Lexandrowitz und Max Horkheimer, 1940; 1 Brief vom National Refugee Service New York an Max Horkheimer, 19.03.1940; 1 Rechnung vom Librairie Generale de Droit & de Jurisprudence Paris an Max Horkheimer, 18.05.1938; 2 Briefe zwsichen L. Lichtwitz und Max Horkheimer, 16.04.1936, 25.07.1938;
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u.a.: Besuch in Frankfurt im Mai 1858; geplante 3. Auflage der "Welt als Wille und Vorstellung" vom Verlag Brockhaus; geplanter kritischer Aufsatz gegen Abhandlung von Georg Carl Rudolph Seydel; Kommentar Schopenhauers zu Goethes Faust; Arbeit an der Übersetzung; Reise nach Paris; Veröffentlichungen von Carl Georg Bähr und Charles Dollfus zur Philosophie Schopenhauers in der Zeitschrift Revue Germanique; Artikel "Aus und über Schopenhauer" von Louis Büchner; Rezension von Franz Brendel; Preisschrift Karl Georg Bährs; David Asher; A. Mailard; Jules Lunteschütz, Charles Dolfus. Louis Büchner; Franz Brendel;
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u.a.: Arthur Schopenhauer; Georg Wilhelm Friedrich Hegel;
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u.a.: Arthur Schopenhauer; Georg Wilhelm Friedrich Hegel;
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Tod des Sohnes, Jules Daltroff