Le prince Joachim de Prusse : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59373

進呈書像Jin cheng shu xiang.

Contient : I天主正道解略Tian zhu zheng dao jie lüe ; IIJin cheng shu xiang

Does reactive surface area depend on grain size? Results from pH 3, 25 circle C far-from-equilibrium flow-through dissolution experiments on anorthite and biotite

Laboratory determined mineral weathering rates need to be normalised to allow their extrapolation to natural systems. The principle normalisation terms used in the literature are mass, and geometric- and BET specific surface area (SSA). The purpose of this study was to determine how dissolution rates normalised to these terms vary with grain size. Different size fractions of anorthite and biotite ranging from 180-150 to 20-10 mu m were dissolved in pH 3, HCl at 25 degrees C in flow through reactors under far from equilibrium conditions. Steady state dissolution rates after 5376 h (anorthite) and 4992 h (biotite) were calculated from Si concentrations and were normalised to initial- and final- mass and geometric-, geometric edge- (biotite), and BET SSA. For anorthite, rates normalised to initial- and final-BET SSA ranged from 0.33 to 2.77 X 10(-10) mol(feldspar) m(-2) s(-1), rates normalised to initial- and final-geometric SSA ranged from 5.74 to 8.88 X 10(-10) mol(feldspar) m(-2) s(-1) and rates normalised to initial- and final-mass ranged from 0.11 to 1.65 mol(feldspar) g(-1) s(-1). For biotite, rates normalised to initial- and final-BET SSA ranged from 1.02 to 2.03 X 10(-12) mol(biotite) m(-2) s(-1), rates normalised to initial- and final-geometric SSA ranged from 3.26 to 16.21 X 10(-12) mol(biotite) m(-2) s(-1), rates normalised to initial- and final-geometric edge SSA ranged from 59.46 to 111.32 x 10(-12) mol(biotite) m(-2) s(-1) and rates normalised to initial- and final-mass ranged from 0.81 to 6.93 X 10(-12) mol(biotite) g(-1) s(-1). For all normalising terms rates varied significantly (p <= 0.05) with grain size. The normalising terms which gave least variation in dissolution rate between grain sizes for anorthite were initial BET SSA and initial- and final-geometric SSA. This is consistent with: (1) dissolution being dominated by the slower dissolving but area dominant non-etched surfaces of the grains and, (2) the walls of etch pits and other dissolution features being relatively unreactive. These steady state normalised dissolution rates are likely to be constant with time. Normalisation to final BET SSA did not give constant ratios across grain size due to a non-uniform distribution of dissolution features. After dissolution coarser grains had a greater density of dissolution features with BET-measurable but unreactive wall surface area than the finer grains. The normalising term which gave the least variation in dissolution rates between grain sizes for biotite was initial BET SSA. Initial- and final-geometric edge SSA and final BET SSA gave the next least varied rates. The basal surfaces dissolved sufficiently rapidly to influence bulk dissolution rate and prevent geometric edge SSA normalised dissolution rates showing the least variation. Simple modelling indicated that biotite grain edges dissolved 71-132 times faster than basal surfaces. In this experiment, initial BET SSA best integrated the different areas and reactivities of the edge and basal surfaces of biotite. Steady state dissolution rates are likely to vary with time as dissolution alters the ratio of edge to basal surface area. Therefore they would be more properly termed pseudo-steady state rates, only appearing constant because the time period over which they were measured (1512 h) was less than the time period over wich they would change significantly. (c) 2006 Elsevier Inc. All rights reserved.

Access to specialized pediatric cancer care in Switzerland

Specialized pediatric cancer centers (PCCs) are thought to be essential to obtain state-of-the-art care for children and adolescents. We determined the proportion of childhood cancer patients not treated in a PCC, and described their characteristics and place of treatment.

Long-term climate change commitment and reversibility: An EMIC Intercomparison

This paper summarizes the results of an intercomparison project with Earth System Models of Intermediate Complexity (EMICs) undertaken in support of the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5). The focus is on long-term climate projections designed to 1) quantify the climate change commitment of different radiative forcing trajectories and 2) explore the extent to which climate change is reversible on human time scales. All commitment simulations follow the four representative concentration pathways (RCPs) and their extensions to year 2300. Most EMICs simulate substantial surface air temperature and thermosteric sea level rise commitment following stabilization of the atmospheric composition at year-2300 levels. The meridional overturning circulation (MOC) is weakened temporarily and recovers to near-preindustrial values in most models for RCPs 2.6-6.0. The MOC weakening is more persistent for RCP8.5. Elimination of anthropogenic CO2 emissions after 2300 results in slowly decreasing atmospheric CO2 concentrations. At year 3000 atmospheric CO2 is still at more than half its year-2300 level in all EMICs for RCPs 4.5-8.5. Surface air temperature remains constant or decreases slightly and thermosteric sea level rise continues for centuries after elimination of CO2 emissions in all EMICs. Restoration of atmospheric CO2 from RCP to preindustrial levels over 100-1000 years requires large artificial removal of CO2 from the atmosphere and does not result in the simultaneous return to preindustrial climate conditions, as surface air temperature and sea level response exhibit a substantial time lag relative to atmospheric CO2.

Der trostlose Jude in der lezten Todes-Stunde : nebst e. Ermahnungs-Schreiben an den Rabbi Koppel Fränkel in Fürth bei Nürnberg, zur unpartheyischen Untersuchung d. wahren Religion

von J[ohann] A[dam] J. A. C. C. Gottfried

Vollständige Tabellen aller Zeitwörter, Substantive und Partikeln der hebräischen Sprache : nebst einer beispielweisen Anleitung zum Gebrauche der §. §. 1 - 29 der hebräischen Sprachlehre (Bamberg 1835)

von Adam Martinet

Einige Worte über den Bau der Ofner-Pesther Kettenbrücke : mit Bezug auf die, in öffentlichen Blättern darüber erschienenen Aufsätze

von Adam Clark

Reaktion und Antisemitismus : zugleich ein Mahnwort an die akademische Jugend

von Adam Röder

Alte Bäuerin aus der Bretagne [Illustration]

Michael Adam

Veere in der Bretagne [Illustration] : nach einer Radierung

Michael Adam

Bildnis der Frau des Künstlers [Illustration] : (Porträt)

Michael Adam

Paul Pauli als "Vater Baumert" [Illustration] : (Porträt)

Michael Adam

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 919 - Zugesicherte Unterstützung wegen der Kritik an der geplanten Schopenhauer-Biographie

Abschrift vorhanden

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 933 - Dankesschreiben anlässlich der Zurücksendung der Brieftasche und Korrespondenzen Schopenhauers

u.a. Anhängerschaft Schopenhauers; Versteigerung des Mobiliars Schopenhauers; Parerga und Paralipomena; Tagebuch Schopenhauer; Biographie;