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Arsenic Mobilization Processes in the Red River Delta, Vietnam
The spatial variability of dissolved arsenic (As) concentrations in aquifers was studied near Ha Noi, Vietnam. The goal was to identify major geochemical, sedimentological and hydrochemical differences between high and low As regions. Also, the behaviour of As and other elements during sequential extractions was characterized with micro synchrotron XRF analysis. Based on the results a conceptual model was developed which could explain the current situation on site and in other affected areas.
Making the Medieval Relevant
When scholars discuss the medieval past, the temptation is to become immersed there, to deepen our appreciation of the nuances of the medieval sources through debate about their meaning. But the past informs the present in a myriad of ways and medievalists can, and should, use their research to address the concerns and interests of contemporary society. This volume presents a number of carefully commissioned essays that demonstrate the fertility and originality of recent work in Medieval Studies. Above all, they have been selected for relevance. Most contributors are in the earlier stages of their careers and their approaches clearly reflect how interdisciplinary methodologies applied to Med...
Selenium Isotope Studies in Plants - Development and Validation of a Novel Geochemical Tool and its Application to Organic Samples
Selenium (Se), being an essential nutrient and a toxin, enters the food chain mainly via plants. Selenium isotope signatures were proved to be an excellent redox tracer, making it a promising tool for the exploration of the Se cycle in plants. The analytical method is sensitive on organic samples and requires particular preparation methods, which were developed and validated in this study. Plant cultivation setups revealed the applicability of these methods to trace plant internal processes.
Chemical, Physical and Mineralogical Properties of Atmospheric Particulate Matter in the Megacity Beijing
The scope of this work is to develop a comprehensive understanding of the aerosol pollution in the megacity Beijing. The focus lies on the interaction of anthropogenic and geogenic aerosol particles, their spatio-temporal variation, the most important pollution sources as well as the impact of particulate aerosols on human health and the environment. Furthermore, the bioavailable fraction of metal concentrations and the effect of mitigation measures during the 2008 Olympic Games were evaluated.
Separating arsenic oxyanions from natural waters for oxygen isotope analysis
This study has developed a complete procedure for the measurement of oxygen isotopes in arsenic oxyanions in natural waters by using different adsorbents. The experimental results of kinetic exchange of oxygen between AsO43- and water show that the entire exchange procedure happens in a very short time at different pH conditions and temperatures.
Landecker Amt
Der vorliegende Band der Trauregister-Reihe fasst 4927Trau-Einträge aus den evangelischen Kirchenbüchern des ehemaligen Amtes Friedwald (Oberamt) und dem Gericht Herringen (Unteramt) z.T. von 1585 bis 1830) in Hessen zusammen und bietet damit Familienforschern eine ideale Basis, die Herkunft einer Familie überregional zu erforschen. Friedewald und Herringen liegen im Landkreis Hersfeld Rotenburg im Nordosten von Hessen.
Selenium Transfer between Kaolinite or Goethite Surfaces, Nutrient Solution and Oryza Sativa
The aim of this study was to describe and quantify Se transfer at the interface between soil and plant. For this purpose, three Se reservoirs were defined: soil, soil solution and plant, represented by kaolinite or goethite, nutrient solution and rice. First, Se transfer from solution to plant and Se partitioning in the plant was studied; then adsorption-desorption processes of Se onto kaolinite and goethite were investigated. Finally, a mass balance of the combined experiment was modelled.
Arsenic in groundwater of West Bengal: Implications from a field study
This publication presents results of an interdisciplinary field study assessing the contribution of biological and inorganic processes in the mobilisation and accumulation of arsenic in groundwater of the Bengal Delta Plain, West Bengal. Investigations were focussed on the distribution of arsenic in sediments and shallow groundwater of two representative study sites. All results were combined in an effort to develop a conceptional model describing the mobility of arsenic in West Bengal aquifers.
Entwicklung eines Smoothed Particle Hydrodynamics (SPH) Codes zur numerischen Vorhersage des Primärzerfalls an Brennstoffeinspritzdüsen
Aufgrund der strengen Schadstoffemissionsrestriktionen zukünftiger Triebwerksgenerationen bedarf es der Entwicklung innovativer und effizienter Triebwerkskonzepte. Eine Optimierung des Zerstäubersystems ist in diesem Zusammenhang unerlässlich. Daher ist es wünschenswert, die Kraftstoffaufbereitung in der Brennkammer unter Verwendung von Airblast-Zerstäubern und insbesondere den bisher noch nicht mit ausreichender Genauigkeit modellierbaren Primärzerfall, in Zukunft numerisch vorhersagen zu können. Im vorliegenden Forschungsbericht wird systematisch untersucht, ob und inwiefern die gitterfreie Lagrange'sche Smoothed Particle Hydrodynamics Methode in diesem Kontext anwendbar ist. Hat der SPH Ansatz das Potential, den Primärzerfall in technisch relevanten Systemen exakt beschreiben zu können? Können die charakteristischen Effekte, die während des Primärzerfalls von Bedeutung sind, korrekt vorhergesagt werden? Welche Modelle sind dafür einsetzbar oder müssen in geeigneter Weise modifiziert werden? Der zentrale Teil dieses Forschungsberichts beschäftigt sich mit der Entwicklung und der umfassenden Validierung des auf der SPH Methode basierenden Strömungslösers.
