988 resultados para 125-783


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J. Bamberger

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Jakob Seifensieder

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Vorbesitzer: Kraft (Cratho); Dominikanerkloster Frankfurt am Main

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veröffentlicht in: Schopenhauer, Arthur : Arthur Schopenhauers sämtliche Werke - München : Piper - Bd. 14 : Der Briefwechsel Arthur Schopenhauers ; 1 (1799 - 1849), Nr. 331;

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u.a. Leben mit Sibylle Mertens-Schaaffhausen;

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Vorbesitzer: Friedrich Martorf

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1 Brief von Frederick Pollock an Max Hürlimann, 09.04.1938; 1 Brief von Frederick Pollock an R. Aron, 11.04.1938; 1 Telegramm von Frederick Pollock an Juliette Favez, 28.08.1937; 1 Brief von Bernhard Reichenbach an Frederick Pollock, 11.08.1937;

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Palladium, platinum, and gold were analyzed for 20 interstitial water samples from Leg 125. No Pd or Pt was detected in fluids from serpentinite muds from Conical Seamount in the Mariana forearc, indicating that low-temperature seawater-peridotite interaction does not mobilize these elements into the serpentinizing fluids to levels above 0.10 parts per billion (ppb) in solution. However, Au may be mobilized in high pH solutions. In contrast, fluids from vitric-rich clays on the flanks of the Torishima Seamount in the Izu-Bonin forearc have Pd values of between 4.0 and 11.8 nmol/L, Pt values between 2.3 and 5.0 nmol/L and Au values between 126.9 and 1116.9 pmol/L. The precious metals are mobilized, and possibly adsorbed onto clay mineral surfaces, during diagenesis and burial of the volcanic-rich clays. Desorption during squeezing of the sediments may produce the enhanced precious metal concentrations in the analyzed fluids. The metals are mobilized in the fluids probably as neutral hydroxide, bisulfide, and ammonia complexes. Pt/Pd ratios are between 0.42 and 2.33, which is much lower than many of the potential sources for Pt and Pd but is consistent with the greater solubility of Pd compared with Pt in most natural low-temperature fluids.

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