Gedenkschrift : uitgegeven ter gelegenheid van het 300-jarig bestaan der onderwijsinrichtingen Talmud Tora en Ets Hai͏̈m bij de Port. Israe͏̈l. Gemeente te Amsterdam : 5376 - 5676

M. C. Paraira en J. S. da Silva Rosa

Ein šin maiśebuch : komṭ her libn mann un froien un ṭuṭ doś šin maiśe buch an šoien ; mit 300 un eṭlichi maiśes bai agndr gbrachṭ ... ir libi laiṭ di do zain lib hober fun ṭaiṭš leienn ...

Digitalisat der Ausg. Frankfurt an der Oder, 1708/09

Ein šin maiśe buch : komṭ her libn ... un ṭuṭ doś šin maiśe buch an šoien mit 300 un eṭlichi maiśes ...

Digitalisat der Ausg. Wilmrśdorf, [circa] 1750

Rothschilds Schatzkästlein für junge Kaufleute : praktisches Hand- und Nachschlagebuch enthaltend mehr als 300 Fragen und Antworten über wichtige Gegenstände der Handels- und Kontorwissenschaft ... ; nebst einem Anhang

[Neubearb.] von Theodor Huber

The mobility of Nb in rutile-saturated NaCl- and NaF-bearing aqueous fluids from 1-6.5 GPa and 300-800 °C

Rutile (TiO2) is an important host phase for high field strength elements (HFSE) such as Nb in metamorphic and subduction zone environments. The observed depletion of Nb in arc rocks is often explained by the hypothesis that rutile sequesters HFSE in the subducted slab and overlying sediment, and is chemically inert with respect to aqueous fluids evolved during prograde metamorphism in the forearc to subarc environment. However, field observations of exhumed terranes, and experimental studies, indicate that HFSE may be soluble in complex aqueous fluids at high pressure (i.e., >0.5 GPa) and moderate to high temperature (i.e., >300 degrees C). In this study, we investigated experimentally the mobility of Nb in NaCl- and NaF-bearing aqueous fluids in equilibrium with Nb-bearing rutile at pressure-temperature conditions applicable to fluid evolution in arc environments. Niobium concentrations in aqueous fluid at rutile saturation were measured directly by using a hydrothermal diamond-anvil cell (HDAC) and synchrotron X-ray fluorescence (SXRF) at 2.1 to 6.5 GPa and 300-500 degrees C, and indirectly by performing mass loss experiments in a piston-cylinder (PC) apparatus at similar to 1 GPa and 700-800 degrees C. The concentration of Nb in a 10 wt% NaCl aqueous fluid increases from 6 to 11 mu g/g as temperature increases from 300 to 500 degrees C, over a pressure range from 2.1 to 2.8 GPa, consistent with a positive temperature dependence. The concentration of Nb in a 20 wt% NaCl aqueous fluid varies from 55 to 150 mu g/g at 300 to 500 degrees C, over a pressure range from 1.8 to 6.4 GPa; however, there is no discernible temperature or pressure dependence. The Nb concentration in a 4 wt% NaF-bearing aqueous fluid increases from 180 to 910 mu g/g as temperature increases from 300 to 500 degrees C over the pressure range 2.1 to 6.5 GPa. The data for the F-bearing fluid indicate that the Nb content of the fluid exhibits a dependence on temperature between 300 and 500 degrees C at >= 2 GPa, but there is no observed dependence on pressure. Together, the data demonstrate that the hydrothermal mobility of Nb is strongly controlled by the composition of the fluid, consistent with published data for Ti. At all experimental conditions, however, the concentration of Nb in the fluid is always lower than coexisting rutile, consistent with a role for rutile in moderating the Nb budget of arc rocks.

Pessach-Legenden : (Fortsetzung von Seite 299/300)

Bar-Ami

Na 1 Nachlass Max Horkheimer, 9 - Korrespondenzen mit der Columbia University in the City of New York (p. I 5, 1-300)

108 Briefe;

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 300 - Mitteilung an den Professor Hugo von Meltzl über den Bearbeitungsstand seiner Bearbeitung zum Nachlass Schopenhauers

u.a.: Probleme bei der Datierung der Briefe Schopenhauers; Bitte um Anonymisierung der Autorenschaft aufgrund politischer Gründe; Eduard Grisebach; Arthur Schopenhauer;

Uriel Acosta: Leben und Bekenntnis eines Freidenkers vor 300 Jahren

von Alfred Klaar

Ms.Ff.F.Stoltze 3. 300 - Brief von Jaques Snatich an Friedrich Stoltze

Kondolation zum Tode Marie Stoltzes

Palästina : 300 Bilder

Einleitung von Sven Hedin. Mit ausführl. beschreib. Text hrsg. von Georg Landauer