Hydrogeochemische Untersuchungen und Bestimmung der exothermen Reaktion in Sedimenten im Tagebau Witznitz-Sachsen: ein Versuch der Erkennung von Eisendisulfidverwitterungsprozessen in Kippen

In this work different methods are used to detect and correlate exothermic reactions, which is caused by iron disulphide oxidation in dump material. Hydrogeochemical as well as, classical analysis methods, such as RDA (X-Ray diffractometry), RFA (X-Ray fluorescens) and DTA (differential thermal analysis) are used. Additionally an interpretation of the thermal bands of a scene, recorded by a DAIS 7915 Sensor, together with measurements taken with a radiation thermometer is done. The applied methods led only partly to success. The hydrogeochemical analysis in combination with the RDA and the dump substrate map proved to be a practical and also an economically feasible assessment. An initial state can be described by pH and conductivity measurements and then completed by the mineralogical deposit. This enabled to determine how much material already weathered over the dump flows. This method combination can successfully be used for the rehabilitation of dumps in the brown coal open cast mining.In der vorliegenden Arbeit wird versucht, exotherme Reaktionen im Kippenmaterial, die durch die Eisendisulfidverwitterung hervorgerufen werden, mit unterschiedlichen Methoden zu erkennen und zu korrelieren. Verwendet wurden hydrogeochemische sowie, RDA (Roentgendiffraktometrie), RFA (Roentgenfluoreszens) und DTA (Differentialthermo) Analysen als klassische Methoden. Zusaetzlich wurde eine Interpretation der Thermalkanaele einer Szene, die mit einem DAIS - Sensor aufgezeichnet wurde, verwendet, wie Messungen mit dem Strahlungsthermometer. Die hier angewendeten Methoden fuehrten nur teilweise zum Erfolg. Fuer eine praktische Aufnahme, die auchoekonomisch machbar erscheint, hat sich die hydrogeochemische Analyse im Verbund mit der RDA und den Kippensubstratkarten erwiesen. Durch pH-und Leitfaehigkeitsmessungen kann ueber die Kippenablaeufe ein Grundzustand beschrieben werden, der es ermoeglicht, ergaenzt durch die mineralogische Bestandsaufnahme, zu bestimmen, wie viel Material bereits verwittert ist. Diese Methodenkombination kann erfolgreich fuer die Rehabilitation von Kippen im Braunkohletagebau eingesetzt werden.SIGLEAvailable from: http://edocs.tu-berlin.de/diss/2000 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Aspects of the biology and ecology of anglerfish (Lophius piscatorius, L.) off the west coast of Scotland ( I.C.E.S. sub area via)

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN014833 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Meaningful movement behavior involves more than the learning of fundamental movement skills

It is argued that focusing on overcoming movement challenges in which skill development plays a role but is not the focus of teaching in physical education, provides a different and more rational perspective than that which has evolved from the current focus on FMS. This argument is supported by findings from sociological research and philosophical theories. Based on the arguments presented in this paper, it is proposed that contextualized (e.g., game-based) approaches are of more value than focusing on FMS only, especially when the aim is to stimulate purposeful physical activity in an educational context

Facilitated transport of CO2 and SO2 through Supported Ionic Liquid Membranes (SILMs)

Sulfur dioxide (SO2) and carbon dioxide (CO2) emissions have to be efficiently controlled due to environmental, economic and social demands. An interesting approach for SO2 and CO2 separation/concentration is the use of supported ionic liquid membranes (SILMs). Ionic liquids (ILs) are very interesting compounds for this application since they have a negligible vapour pressure, leading to high stability and reducing solvent losses by volatilization to the gas stream. pIn this work, the permeabilities of air, CO2 and 10 vol.% SO2-air have been obtained using different SILMs. The permeability of air is one order of magnitude lower than CO2 permeability and it is also lower than the permeability of the mixture of air and 10 vol.% SO2. In addition, the selectivities of CO2 and the SO2 mixture have been obtained