Sample records for ehemaligen ronneburger uranbergbaus

  1. Final covering of the Ronneburg uranium mining site

    International Nuclear Information System (INIS)

    Hoepfner, Uwe


    The rehabilitation of WISMUT's former Ronneburg uranium mining site involves backfilling of waste rock to the Lichtenberg open pit. The relocation project comprises about 110 million m 3 of sulphide-bearing and AMD-generating waste rock which makes it the most important and most cost-intensive single surface restoration project conducted by WISMUT at the Ronneburg site. The backfilled waste rock has to be covered on an area of about 220 ha to control water infiltration and gas diffusion. Design planning for the final cover placement which began in 2004 had to be based on a comprehensive cost-benefit analysis as well on field tests of alternative cover options which are in compliance with legal requirements. An intensive testing program concerning the vadose zone of soil covers has therefore been started in 2000. The paper presents an overview of the monitoring program and the results of the vadose zone measurements. The water of soil covers have to be predicted for extended evaluation periods. Therefore water balance simulations of single layer covers (storage and evaporation concept) taking current and future soil and climate conditions into account are performed with the HYDRUS 2D code. (author)

  2. Radioecological studies of agricultural floodplain of the Mulde River on the consequences of the former uranium mining; Radiooekologische Untersuchungen landwirtschaftlich genutzter Auen der Mulde zu den Folgen des ehemaligen Uranbergbaus

    Energy Technology Data Exchange (ETDEWEB)

    Bister, Stefan


    At the time of Warsaw Pact, the former German Democratic Republic (GDR) was one of the largest producer of uranium in the world and the most important supplier of uranium for the USSR. The former Saxon uranium mining areas are drained by the Zwickauer Mulde River. The Mulde River is a left side tributary or the Elbe River and mainly situated in Saxony. The frontal flows, Freiberger Mulde River and Zwickauer Mulde River, merge close to the small village of Sermuth to form the Vereinigte Mulde River, which flows into the Elbe River near Dessau. This research project was established to quantify the long-term effect of the former uranium mining activities on the floodplain ecosystem of the Mulde River. The radiological impact from the agricultural use of the alluvial soils was investigated. More than 280 samples from different environmental compartments (river water, surface sediment from the river, alluvial soils and agricultural crops) were sampled and analysed by radiometric methods. All of the compartments still show an impact from the former uranium mining. However, comparisons with earlier measurements reveal a considerable decrease of the radionuclide contamination. Thus, it is not possible to relate the activities in the soil samples to the activities of the water and sediment samples measured in parallel. Radionuclides originating from the alluvial soils enter the human food chain as a result of the agricultural use of the floodplains. Yet, the radiological effect is small. The uranium contamination of the river water results in activity values lying beyond the threshold of the current German Drinking Water Ordinance. Dose calculations based on the ''Berechnungsgrundlage Bergbau'' [BGB10] do not exceed the guidance level of 1 mSv additional potential radiation exposure per year for the current agricultural use, even assuming most disadvantageous conditions.

  3. Prediction of the flooding process at the Ronneburg site - results of an integrated approach

    International Nuclear Information System (INIS)

    Paul, M.; Saenger, H.-J.; Snagowski, S.; Maerten, H.; Eckart, M.


    The flooding process of the Ronneburg uranium mine (WISMUT) was initiated at the turn of the year 1997 to 1998. In order to prepare the flooding process and to derive and optimize technological measures an integrated modelling approach was chosen which includes several coupled modules. The most important issues to be answered are: (1) prediction of the flooding time (2) prediction of the groundwater level at the post-flooding stage, assessment of amount, location and quality of flooding waters entering the receiving streams at the final stage (3) water quality prediction within the mine during the flooding process (4) definition of technological measures and assessment of their efficiency A box model which includes the three-dimensional distribution of the cavity volume in the mine represents the model core. The model considers the various types of dewatered cavity volumes for each mine level / mining field and the degree of vertical and horizontal connection between the mining fields. Different types of open mine space as well as the dewatered geological pore and joint volume are considered taking into account the contour of the depression cone prior to flooding and the characteristics of the different rock types. Based on the mine water balance and the flooding technology the model predicts the rise of the water table over time during the flooding process for each mine field separately. In order to predict the mine water quality and the efficiency of in-situ water treatment the box model was linked to a geochemical model (PHREEQC). A three-dimensional flow model is used to evaluate the post-flooding situation at the Ronneburg site. This model is coupled to the box model. The modelling results of various flooding scenarios show that a prediction of the post-flooding geohydraulic situation is possible despite of uncertainties concerning the input parameters which still exist. The post-flooding water table in the central part of the Ronneburg mine will be 270 m

  4. Sanitation of overburden dumps containing organic pollutants. Soil pollution obstructs removal of overburden dumps at Ronneburg

    International Nuclear Information System (INIS)

    Hammami, R.; Fischer, D.


    Contamination of mineral oil hydrocarbons is a common problem in soil sanitation, and classic methods are employed as a rule. In one case, radioactivity of the polluted rock material, a wide spectrum of pollutants and a high pollutant level necessitated adapted solutions. The task was tackled in a joint effort by builder-owners, authorities, sanitation experts and scientific experts in consideration of economic and ecological aspects [de

  5. Feasibility study to combine the evaluation of radiological and chemical-toxicological effects of old contaminated sites; Machbarkeitsstudie zur Verknuepfung der Bewertung radiologischer und chemisch-toxischer Wirkungen von Altlasten

    Energy Technology Data Exchange (ETDEWEB)

    Jacob, P.; Proehl, G. [Gesellschaft fuer Strahlen- und Umweltforschung mbH Muenchen, Neuherberg (Germany). Inst. fuer Strahlenschutz; Schneider, K.; Voss, J.U. [FoBiG Forschungs- und Beratungsinstitut Gefahrstoffe GmbH, Freiburg im Breisgau (Germany)


    The uranium mining regions of the German Federal States Saxony, Thuringia and Saxony-Anhalt are contaminated by radionuclides and by chemical substances. For both, ionizing radiations and chemicals, concepts and models exists to assess possible health effects for the population living in such areas. However, these assessment models were developed independently for both kinds of contaminants. Therefore, the 9{sup th} Conference of the State Ministers for Environmental Protection have claimed that for the evaluation of contaminated sites the radiological and chemical contaminants should be integrated into a joint assessment. This feasibility study describes the state of the art of the concepts and models used for the evaluation of radiological and chemical contaminants. The similarities and differences of these evaluation methods are identified and discussed. Suggestions are made for an integrated assessment to standardize the evaluation of sites contaminated by radionuclides or chemicals. (orig.) [Deutsch] In den Gebieten des ehemaligen Uranbergbaus der Bundeslaender Sachsen, Thueringen und Sachsen-Anhalt treten neben den radioaktiven Kontaminationen auch andere Schadstoffe, insbesondere Schwermetalle, auf. Fuer ionisierende Strahlung und fuer chemische Noxen existieren unabhaengig voneinander entwickelte Bewertungssysteme zum Schutz vor Gesundheitsgefahren und Empfehlungen zum Umgang mit kontaminierten Standorten. Vor diesem Hintergrund forderte die 9. Umweltministerkonferenz - Ost am 17./18. Juni 1993 eine `Verknuepfung der radiologischen und konventionellen Altlastenbewertung`. Ob diese Verknuepfung moeglich ist und in welcher Weise diese vorgenommen werden kann, ist bisher nicht untersucht worden. Diese Machbarkeitsstudie unternimmt eine Bestandsaufnahme von Uebereinstimmungen und Unterschieden der beiden bestehenden Bewertungssysteme fuer Kontaminationen mit Radionukliden und mit chemisch-toxischen Stoffen und zeigt einen Weg auf zur Verinheitlichung der

  6. Analysis of epigenetic effects (microRNAs) in former employees of Wismut; Analyse epigenetischer Effekte (mikro RNAs) in ehemaligen Wismutbeschaeftigten

    Energy Technology Data Exchange (ETDEWEB)

    Johnen, Georg; Bruening, Thomas; Weber, D.G.


    Aim of the study was the development and establishment of an oligonucleotide microarray for expression analysis of microRNAs (miRNAs) in whole blood of former uranium miners. To identify possible biomarkers of radiation exposure, samples of high- and low-exposed miners were screened with microarrays that carried 703 human miRNA probes. To that end, 60 RNA samples of the project ''Creation of a biological sample and data collection of occupationally radiation-exposed workers (German Uranium Miners Biobank) - a pilot study'' (3607S04532) were analysed and potential biomarkers verified by quantitative real-time PCR (qRT-PCR). During the initial screening, mirRNA-548d-5p, showing a significantly altered expression between low- and high-exposed miners, was identified as a possible biomarker candidate. Verification by qRT-PCR confirmed the difference in expression, however, the result was not statistically significant.

  7. Remediation measures at the former hazardous waste dump at Malsch near Heidelberg; Sanierung der ehemaligen Sonderabfalldeponie Malsch. Hydrogeologische Bewertung

    Energy Technology Data Exchange (ETDEWEB)

    Hanstein, P.; Hoetzl, H. [Karlsruhe Univ. (T.H.) (Germany). Lehrstuhl fuer Angewandte Geologie


    The former hazardous waste deposit of Malsch is located south of Heidelberg at the eastern margin of the Upper Rhine Graben. Using a former clay pit about 700.000 m{sup 3} of partly high toxic organic and inorganic wastes were deposited from 1971 to 1984. A leakage from the deposit was first recognised in 1984. Detailed investigation showed that thin channel-like conglomerate layers intercalated in the clays and marls as well as faults are cropping out into the base of the deposit and cause a direct seepage of leachate. Contaminants pollute the downstream area over a distance of 500 m. Remediation measures adding up to 100 Mio. DM were carried out including the construction of a slurry wall encircling laterally the whole site, a surface cover with a multi-liner system as well as a pump and treat system for the leachate was installed and are now in operation. Model studies of the ground water flow including a 3-dimensional site model and a 2-dimensional regional model started during the remediation work. According to the complex geological situation specific procedures was applied to transform the heterogeneous tectonical structure into the numerical models. The balance of water flowing through the deposit was calculated by the piezometric heads to assess different remediation stages. In spite of the missing impervious base the calculation could prove that in connection of a certain pumping rate of the leachate the environment and especially the groundwater can be protected from further leakage. (orig.) [Deutsch] Die fruehere Sonderabfalldeponie Malsch wurde 1971 in einer stillgelegten Tongrube suedlich von Heidelberg am oestlichen Rand des Oberrheingrabens angelegt und bis 1984 betrieben. Insgesamt wurden ueber 700.000 m{sup 3} zum Teil hochtoxische organische und anorganische Sonderabfaelle abgelagert. Mit Abschluss der Deponierungsphase wurden Sickerwasseraustritte im westlichen Deponievorfeld festgelstellt. Ursache fuer die Undichtigkeiten waren geringmaechtige durchlaessige Einschaltungen in die tonig mergelige Folge, die durch Stoerungen hydraulisch miteinander verknuepft waren. Zur Sanierung wurde mit einem Kostenaufwand von ueber 100 Mio. DM eine Zweiphasen-Dichtwand, eine neue kombinierte Oberflaechenabdichtung und wegen der fehlenden Basisabdichtung eine Deponie-interne Drainage mit Sickerwasserentnahme eingerichtet. Begleitend zur Sanierung wurden 3-dimensionale Modellberechnungen zur Grundwasserstroemung im Bereich der Deponie fuer unterschiedliche Sicherungsmassnahmen sowie 2-dimensionale Modelle zur Bewertung des Schadstoffabstroms im Grundwasserleiter vorgenommen. Trotz der fehlenden Basisabdichtung konnte die Effektivitaet der Massnahme im Deponiebereich nachgewiesen und Optimierungsmoeglichkeiten aufgezeigt werden. Fuer das Umfeld konnten die recht guenstigen hydrogeologischen Barriereeigenschaften mit der geringen Schadstoffausbreitung herausgearbeitet werden. (orig.)

  8. Intercomparison of deposition measurements in the Federal Republic of Germany and in the former GDR. Vergleich der Depositionsmessungen in der Bundesrepublik Deutschland und in der ehemaligen DDR

    Energy Technology Data Exchange (ETDEWEB)

    Winkler, P. (Deutscher Wetterdienst, Hamburg (Germany). Meteorologisches Observatorium); Georgii, H.W. (Frankfurt Univ. (Germany). Inst. fuer Meteorologie und Geophysik); Andersson, T. (Frankfurt Univ. (Germany). Inst. fuer Meteorologie und Geophysik)


    During two field campaigns, methods to determine wet deposition have been intercompared, as used in the Federal Republic of Germany and the former GDR. The scope of the first campaign was to assess the quality of measurements of past years. The goal of the second campaign was to intercompare improved instruments to achieve a better harmonization of sampling techniques in future. 9 and 12 collectors were included in the first and in the second field campaign, respectively. A number of reasons could be made responsible for systematic measurement errors in the past and recommendations for their elimination were made. The precipitation sensors used to open and close wet only collectors, have been investigated in the laboratory for their threshold sensitivity with respect to precipitation intensity. Reasons for poor sensitivity have been investigated also. Additionally, an intercomparison of fog water collectors has been conducted with 7 instruments, 5 of which were activ and two of which were passive collectors. Systematic differences in the composition of the samples of active and passive collectors were found, which could be traced back mainly to differences in collection efficiency with respect to drop size. (orig.)

  9. Der Umgang mit den beschlagnahmten Kunstwerken aus Schlössern des ehemaligen Herrscherhauses Habsburg-Lothringen. Ein Dilemma für die junge Tschechoslowakische Republik nach 1918

    Czech Academy of Sciences Publication Activity Database

    Uhlíková, Kristina


    Roč. 70, 1/2 (2016), s. 232-245 ISSN 0029-9626 Institutional support: RVO:68378033 Keywords : Archduke Franz Ferdinand d´Este * history of monument preservation * castles Subject RIV: AL - Art , Architecture, Cultural Heritage

  10. Mission achieved - in spite of desorption and rediffusion. Remediation of land pollution at the site of the former gas works of Biberach a.d. Riss; Trotz Desorption und Rueckdiffusion ans Ziel. Altlastensanierung des ehemaligen Gaswerks Biberach a.d. Riss

    Energy Technology Data Exchange (ETDEWEB)

    Osberghaus, T.; Zwisler, R.


    The land pollution commission of the German state of Baden-Wuerttemberg at the site of the former gas works of Biberach decided that 6500 cubic metres of soil should be exchanged. Down to a depth of 2.5 m, this was done by conventional methods. Down to 7 m, i.e. at groundwater level, the polluted soil will be removed via large-diameter boreholes. Of course, it is not the technology that is important but the goal to be achieved. The contribution therefore discusses the time required for reaching the depollution goal, i.e. how fast groundwater pollution in the discharge should be removed. (orig.)

  11. Development and testing of an in situ bioreactor. Combining microbiology and activated carbon adsorption on the site of a former tar factory; Entwicklung und Erprobung eines In-situ-Bioreaktors. Kombination von Mikrobiologie und A-Kohle-Adsorption am Standort einer ehemaligen Teerfabrik

    Energy Technology Data Exchange (ETDEWEB)

    Weingran, C.; Alt, S.; Schad, H.; Tiehm, A.; Mueller, A.


    A tar factory operated on the Main river nearly 100 years ago left a massive groundwater contamination with tar oil (BTEX and PAH). For safeguarding the quaternary aquifer by a funnel and gate system, a new reactor type for combined microbiological degradation and activated carbon adsorption was developed andtested in the context of the RUBIN research project. Biodegradation of BETEX and PAH with two and three rings limits the function of activated carbon adsorption to the retention of higher-molecular PAH and will lengthen the life of the activated carbon stage to several years. (orig.)

  12. Reseña libro

    Directory of Open Access Journals (Sweden)

    Alejandro Curiel Ramírez del Prado


    Full Text Available Andreas Brockmann, Ämtersysteme. Dynamik und Funktionen von Ämtersystemen im Einflussgebiet des ehemaligen spanischen Kolonialreiches in Amerika. Berlín: Lit Verlag, 2014 (Ethnologische Studien Bd. 45, IX+367 pp., ISBN 978-3-643-12502-6.

  13. »Meine Tochter […] soll alles lernen, was die weissen Mädchen lernen…«. »Schwarze« Perspektiven auf Deutschland um 1900

    Directory of Open Access Journals (Sweden)

    Josch Lampe


    Full Text Available Der Artikel untersucht zwei gegensätzliche »schwarze« Perspektiven auf Deutschland um 1900. Ein Vergleich zwischen dem aus dem ehemaligen Deutsch-Südwestafrika stammenden Friedrich Maharero und dem Togolesen Nayo Bruce zeigt, inwiefern zwei unterschiedliche Standpunkte im kolonialen Kontext nicht nur die Umkehrperspektiven kolonialer Strukturen verdeutlichen, sondern in ihrer Verschiedenheit auch die Komplexität der Thematik darlegen.

  14. Die Umweltschäden und Entsorgungsprobleme des russischen Nuklearkomplexes


    Kronfeld-Goharani, Ulrike


    "Als Nachfolgestaat der ehemaligen Sowjetunion mit ihrer gigantischen Nuklearindustrie zählt Russland heute zu den Ländern, in denen sich große Mengen Nuklearmüll angereichert haben und einzelne Regionen des Landes von radioaktiven Kontaminationen besonders stark betroffen sind. Ungeachtet dessen änderte im Juni 2001 das russische Parlament das Umweltgesetz, um verbrauchten Nuklearbrennstoff aus dem Ausland in großen Mengen zu importieren. Während Befürworter der Gesetzesänderungen den Import...

  15. Verfassungsgerichte in Westafrika: unabhängige Krisenmanager?


    Heyl, Charlotte; Stroh, Alexander


    Am 15. November 2013 verkündete der Oberste Gerichtshof Guineas das endgültige Ergebnis der Parlamentswahlen vom 28. September. Der Gerichtshof war während der Transitionsphase mit der Kontrolle der Wahlen betraut. Er wurde heftig kritisiert und seine Unabhängigkeit wurde angezweifelt. Das Parlament hat nun den Auftrag, die Transitionsphase abzuschließen und ein unabhängiges Verfassungsgericht einzurichten, das Verlauf und Ergebnisse künftiger Wahlen prüfen wird. Alle ehemaligen Kolonien Fran...

  16. Ergebnisse einer Fallstudie zur richterlichen Unabhängigkeit


    Baer, Andrea


    "In diesem Vortrag wird das Verständnis und die Rechtspraxis der richterlichen Unabhängigkeit in der ehemaligen DDR und in der Bundesrepublik Deutschland vergleichend dargestellt. Grundlage für den Vergleich der Rechtspraxis sind Erfahrungen der Richter und Richterinnen, die bereits in der DDR als solche tätig waren und in die bundesdeutsche Justiz übernommen wurden, insbesondere deren rückblickende Einschätzung der DDR und erster Eindruck von dem neuen Justizsystem werden wiedergegeben. Dies...

  17. Schlierberg solar village in Freiburg; Solarsiedlung am Freiburger Schlierberg

    Energy Technology Data Exchange (ETDEWEB)

    Etspueler, M.


    There is nothing particularly striking in the eight modular terrace houses that were constructed on the sports fields of the former Vauban barracks in Freiburg. Rather, it is the interplay of many different factors which make the buildings produce more energy than they consume. (orig.) [German] Die acht modular aufgebauten Reihenhaustypen, die auf den Sportplaetzen der ehemaligen Vauban-Kaserne entstanden sind, zeichnen sich nicht durch irgendwelche aussergewoehnlichen Einzelmassnahmen aus. Erst das Zusammenspiel vieler Faktoren ermoeglichen die Hauskonzepte, die mehr Energie produzieren als sie verbrauchen. (orig.)

  18. Insight into a Pedagogical Sketchbook. Life and work of Eva Eyquem


    Richter, Sabine


    Die vorliegende Arbeit dokumentiert und kontextualisiert das Werk der französischen Kunstpädagogin und ehemaligen Itten-Schülerin Eva Eyquem, geb. Plaut (1915-2009). Es ist meine Absicht, ihr Werk für Forschung und Lehre zugänglich zu machen und für einen kunstpädagogischen Diskurs zu öffnen, der sich mit Positionen in der Nachfolge der Bauhaus-Pädagogik befasst. Meine Arbeit ist in zwei Teile gegliedert. Sie umfasst eine Monografie zu Eva Eyquem, sowie eine fachwissenschaftliche Reflexion, i...

  19. Fürchtet China Edward Snowden?


    Rühlig, Tim


    Vielfach ist argumentiert worden, China sei einer der Hauptprofiteure von den Enthüllungen des ehemaligen amerikanischen Geheimdienstmitarbeiters Edward Snowden. Amerikas früherer Vizepräsident Dick Cheney sieht in ihm gar einen Spion der Volksrepublik China. Peking wies das sofort zurück. Ein Blick auf die chinesische Diskussion um Edward Snowden zeigt: Nicht nur Cheneys Vermutung schießt deutlich über das Ziel hinaus. Denn die chinesische Führung beobachtet die Entwicklung gleichsam aufmerk...

  20. Forage and rangeland plants from uranium mine soils: long-term hazard to herbivores and livestock? (United States)

    Gramss, Gerhard; Voigt, Klaus-Dieter


    Metalliferous uranium mine overburden soils integrated into arable land or stabilized by perennial rangeland plants evoke concern about the quality of crops and the exposure of grazing and thereby soil-ingesting (wildlife) herbivores to heavy metals (HM) and radionuclides. In a 2-year trial, thirteen annual and perennial forage and rangeland plants were thus potted on, or taken from, cultivated field soil of a metalliferous hot spot near Ronneburg (Germany). The content of soil and shoot tissues in 20 minerals was determined by ICP-MS to estimate HM (and uranium) toxicities to grazing animals and the plants themselves, and to calculate the long-term persistence of the metal toxicants (soil clean-up times) from the annual uptake rates of the plants. On Ronneburg soil elevated in As, Cd, Cu, Mn, Pb, U, and Zn, the shoot mineral content of all test plants remained preferentially in the range of "normal plant concentrations" but reached up to the fourfold to sixfold in Mn, Ni, and Zn, the 1.45- to 21.5-fold of the forage legislative limit in Cd, and the 10- to 180-fold of common herb concentrations in U. Shoot and the calculated root concentrations in Cd, Cu, Ni, and Zn accounted for phytotoxic effects at least to grasses and cereals. Based on WHO PTWI values for the tolerable weekly human Cd and Pb intake, the expanded Cd and Pb limits for forage, and reported rates of hay, roots, and adhering-soil ingestion, the tolerable daily intake rates of 0.65/11.6 mg in Cd/Pb by a 65 kg herbivore would be surpassed by the 11- to 27/0.7- to 4.7-fold across the year, with drastic consequences for winter-grazing and thereby high rates of roots and soil-ingesting animals. The daily intake of 5.3-31.5 mg of the alpha radiation emitter, U, may be less disastrous to short-lived herbivores. The annual phytoextraction rates of critical HM by the tested excluder crops indicate that hundreds to thousands of years are necessary to halve the HM and (long-lived) radionuclide load of

  1. New landscapes in mining regions; Neue Landschaften in Bergbauregionen

    Energy Technology Data Exchange (ETDEWEB)

    Knoll, S.; Stein, M. [Knoll Oekoplan GmbH, Leipzig-Sindelfingen (Germany)


    The authors describe their experience in mining land reclamation in Central Germany, to which they contributed as planners of new landscapes. [German] An einigen Projekten haben wir als Buero fuer Landschaftsarchitektur und Landschaftsplanung in Sachsen-Anhalt und Sachsen mitgearbeitet. Im Mittelpunkt stand dabei die Gestaltung von Bergbaufolgelandschaften des Braunkohlebergbaus. Daneben gibt es seit mehreren Jahren eine Zusammenarbeit mit der Wismut GmbH sowohl im Raum Aue-Schlema-Schneeberg als auch im ostthueringer Sanierungsraum Ronneburg. Mit dem Gruenleitplan fuer Aue-Schlema-Schneeberg haben wir 1995 den Deutschen Landschaftsarchitekturpreis erhalten. Wir, das heisst unser Buero fuer Landschaftsarchitektur und Landschaftsplanung, die beteiligten Kommunen und die Wismut GmbH, die diesen Plan gemeinsam in einem kooperativen Verfahren erarbeitet haben. Den Preis erhielten wird deshalb nicht nur fuer das Ergebnis dieses fuer Landschaftsplaner damals noch recht ungewoehnlichen Planungsprozesses, sondern auch fuer das Verfahren selbst. Vergleichbare ungewoehnliche Wege der Planung waren notwendig, um als Landschaftsarchitekten Einfluss auf die Gestaltung der Bergbaufolgelandschaft des Braunkohlebergbaus im Prozess der bergbaulichen Sanierung nehmen zu koennen. Und wir werden diese Erfahrungen brauchen, wenn wir zusammen mit den Staedten Gera und Ronneburg, dem Landkreis Greiz und der Wismut GmbH eine Bundesgartenschau in der Region Ostthueringen fuer das Jahr 2007 vorbereiten. (orig.)

  2. Innere Emigration und Diktatur die getarnten Botschaften in den Opern der meister aus bojana von Konstantin Iliev und der gefesselte Prometeus von Lazar Nikolov

    Directory of Open Access Journals (Sweden)

    Kostakeva Maria


    Full Text Available (nemački Die Frage der "inneren Emigration" in den ehemaligen kommunistischen Ländern Europas wird an Beispielen zweier Opern der wichtigen bulgarischen Komponisten Konstantin Iliev und Lazar Nikolov untersucht. Ähnlich wie Paul Hindemith in Mathis der Maler, in Ilievs Meister aus Bojana (1962, kam die Inspiration von einer mittelalterlichen Legende her, und iM Mittelpunkt des Dramas steht das Problem der Freiheit der Schöpfer unter der dogmatischen Gewalt. IM Gefesselten Prometeus (1972 von Nikolov ist die Hauptperson als Symbol des Protests gegen die Tyrannei und die Unterdrückung zu verstehen und so lässt sich in allen Zeiten politisch interpretieren, umso mehr bei einem kommunistischen Regime.

  3. Microbial links between sulfate reduction and metal retention in uranium- and heavy metal-contaminated soil

    DEFF Research Database (Denmark)

    Sitte, Jana; Akob, Denise M.; Kaufmann, Christian


    Sulfate-reducing bacteria (SRB) can affect metal mobility either directly by reductive transformation of metal ions, e.g., uranium, into their insoluble forms or indirectly by formation of metal sulfides. This study evaluated in situ and biostimulated activity of SRB in groundwater-influenced soils...... from a creek bank contaminated with heavy metals and radionuclides within the former uranium mining district of Ronneburg, Germany. In situ activity of SRB, measured by the 35SO42– radiotracer method, was restricted to reduced soil horizons with rates of 142 ± 20 nmol cm–3 day–1. Concentrations...... of heavy metals were enriched in the solid phase of the reduced horizons, whereas pore water concentrations were low. X-ray absorption near-edge structure (XANES) measurements demonstrated that 80% of uranium was present as reduced uranium but appeared to occur as a sorbed complex. Soil-based dsrAB clone...

  4. Uranium mining wastes, garden exhibition and health risks

    International Nuclear Information System (INIS)

    Schmidt, Gerhard; Schmidt, Peter; Hinz, Wilko


    Available in abstract form only. Full text of publication follows: For more than 40 years the Soviet-German stockholding company SDAG WISMUT mined and milled Uranium in the East of Germany and became up to 1990 the world's third largest Uranium producer. After reunification of Germany, the new found state own company Wismut GmbH was faced with the task of decommissioning and rehabilitation of the mining and milling sites. One of the largest mining areas in the world, that had to be cleaned up, was located close to the municipality of Ronneburg near the City of Gera in Thuringia. After closing the operations of the Ronneburg underground mine and at the 160 m deep open pit mine with a free volume of 84 Mio.m 3 , the open pit and 7 large piles of mine waste, together 112 Mio.m 3 of material, had to be cleaned up. As a result of an optimisation procedure it was chosen to relocate the waste rock piles back into the open pit. After taking this decision and approval of the plan the disposal operation was started. Even though the transport task was done by large trucks, this took 16 years. The work will be finished in 2007, a cover consisting of 40 cm of uncontaminated material will be placed on top of the material, and the re-vegetation of the former open pit area will be established. When in 2002 the City of Gera applied to host the largest garden exhibition in Germany, Bundesgartenschau (BUGA), in 2007, Wismut GmbH supported this plan by offering parts of the territory of the former mining site as an exhibition ground. Finally, it was decided by the BUGA organizers to arrange its 2007 exhibition on grounds in Gera and in the valley adjacent to the former open pit mine, with parts of the remediated area within the fence of the exhibition. (authors)

  5. Linking Mn(II)-oxidizing bacteria to natural attenuation at a former U mining site (United States)

    Akob, D.; Bohu, T.; Beyer, A.; Schäffner, F.; Händel, M.; Johnson, C.; Merten, D.; Büchel, G.; Totsche, K.; Küsel, K.


    Uranium mining near Ronneburg, Germany resulted in widespread environmental contamination with acid mine drainage (AMD) and high concentrations of heavy metals and radionuclides. Despite physical remediation of the area, groundwater is still a source of heavy metal contaminants, e.g., Cd, Ni, Co, Cu and Zn, to nearby ecosystems. However, natural attenuation of heavy metals is occurring in Mn oxide rich soils and sediments ranging in pH from 5 to 7. While microorganisms readily oxidize Mn(II) and precipitate Mn oxides at pH ~7 under oxic conditions, few studies describe Mn(II)-oxidizing bacteria (MOB) at pH ~5 and/or in the presence of heavy metals. In this study we (1) isolated MOB from the contaminated Ronneburg area at pH 5.5 and 7 and (2) evaluated the biological formation of Mn oxides. We isolated nine MOB strains at pH 7 (members of the Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes phyla) and a single isolate at pH 5.5 (Oxalobacteraceae isolate AB_14, within the β-Proteobacteria). LA-ICP-MS showed that all isolates accumulated Mn and Fe in their biomass. However, the Oxalobacteraceae isolate AB_14 oxidizes more Mn without additional Fe in the medium. Preliminary FTIR analysis indicated that all isolates formed precipitates, which showed absorption bands that were characteristic for birnessite. High resolution TEM showed variable morphology of precipitates and EDS confirmed the presence of Mn oxides. Isolate AB_14 was not surrounded with precipitates whereas our Actinobacteria isolate AB_18 was encrusted with Mn oxides. Electron diffraction is currently being used to confirm the presence of birnessite and other Mn oxide phases. This, the first known report of any organism capable of Mn oxidation at low pH, demonstrated that MOB can be involved in the natural attenuation of both moderately acidic and neutral pH soils and sediments via the formation of biogenic Mn oxides. Future work will fully evaluate the minerals formed in this process as well

  6. 'Neue Muehle' at Kassel. Modern hydroelectric power plant, protected historical industrial plant, technical museum; Die ''Neue Muehle'' in Kassel. Moderne Wasserkraftanlage, Industriedenkmal und technisches Museum

    Energy Technology Data Exchange (ETDEWEB)

    Hamerak, K.


    Rumours have it that the Staedtische Werke der Stadt Kassel paid DM 4 million for reactivation of the 'Neue Muehle' hydroelectric power station. This equals a specifi installed cost of 4 x R10{sup 6} DM/310 kW=12 903 DM/kW. This includes the cost of restoring the historical power station components. The new power plant will provide about 850 - 1000 private households with electric power. It has an expected life of 30 years, and the owner is convinced that the amortisation period will be ten years at the most. [German] In die gesamte Reaktivierung des Wasserkraftwerkes 'Neue Muehle' sollen die Staedtischen Werke der Stadt Kassel angeblich einen Betrag von 4 Mio. DM investiert haben. Damit belaufen sich die stets als brauchbare Vergleichsgroesse dienenden spezifischen installierten Anlagenkosten auf 4 x 10{sup 6} DM/310 kW=12 903 DM/kW. Darin enthalten sind aber hier ausser der reinen Energiegewinnungsanlage, welche in dieser Groessenordnung ca. 850-1 000 Privathaushalte mit elektrischer Energie zu versorgen vermag, auch die restaurierten, dem Denkmalschutz unterliegenden ehemaligen Kraftwerkskomponenten. Der Betreiber rechnet mit einer Lebensdauer von weit ueber 30 Jahren und glaubt mit Sicherheit, dass sich die gesamte Kraftanlage in spaetestens zehn Jahren amortisiert haben wird. (orig.)

  7. Underground gas storage Uelsen: Findings from planning, building and commissioning. Part 1: Deposit; Untertagegasspeicher Uelsen: Erkenntnisse aus Planung, Bau und Inbetriebnahme. Teil 1: Lagerstaette

    Energy Technology Data Exchange (ETDEWEB)

    Wallbrecht, J.; Beckmann, H.; Reiser, H.; Wilhelm, R. [BEB Erdgas und Erdoel GmbH, Hannover (Germany)


    The underground gas storage at Uelsen which was built as a H-gas storage in a former variegated sandstone gasfield in Western Lower Saxony close to the town of Nordhorn has added to the gas supply system of the BEB Erdgas and Erdoel GmbH. The underground storage is connected to the Bunde-Rheine transport pipeline BEB-grid gas system by a 27 km pipeline and is a consequent expansion of BEB`s underground storage/transport system. Planning, building and commissioning were handled by BEB. Findings to date are described. [Deutsch] Der Untertagegasspeicher (UGS) Uelsen, der in einem ehemaligen Buntsandstein Gasfeld im westlichen Niedersachsen in der Naehe der Stadt Nordhorn als H-Gasspeicher eingerichtet wurde, hat die BEB Erdgas und Erdoel GmbH eine weitere Staerkung ihres Gasversorgungssystems erreicht. Der UGS Uelsen ist ueber eine 27 km lange Anbindungsleitung mit der zum BEB - Ferngasleitungssystems gehoerenden Bunde-Rheine Transportleitung verbunden und stellt eine konsequente Erweiterung des BEB Untertagegasspeicher-/Transportsystems dar. Planung, Bau und Inbetriebnahme erfolgten durch BEB im Rahmen einer integrierten bereichsuebergreifenden Projektbearbeitung. Die hierbei gewonnenen Erkenntnisse werden im Folgenden fuer den Untertagebereich dargestellt. (orig.)

  8. The documentation center on the 'Reichsparteitag' terrain at Nuremberg; Dokumentationszentrum Reichsparteitagsgelaende in Nuernberg

    Energy Technology Data Exchange (ETDEWEB)

    Hufer, B.; Wiedmann, E. [Dess-Falk Beratende Ingenieure, Nuernberg (Germany)


    There is hardly another city in Germany that is haunted by its history as much as Nuremberg - not its medieval history as an important trade center but the period of the Hitler and after. This applies to political history as well as to the buildings that remained. For example, there are many unfinished buildings and ruins on the 4 km{sup 2} 'Reichsparteitag' terrain. Since 2001, this terrain houses a documentation centre as a contribution to coming to terms with history. [German] Kaum eine zweite deutsche Stadt ist derart mit ihrer Geschichte verbunden wie Nuernberg. Nicht mit der Bedeutung als freie Reichsstadt im ausgehenden Mittelalter, vielmehr mit den Reichsparteitagen in der Zeit des Nationalsozialismus und den Nuernberger Prozessen muss sie sich bis heute auseinandersetzen. Dies betrifft nicht nur das geistige Erge, sondern auch das staedtebauliche. So finden sich noch heute zahlreiche unvollendete Bauwerke und Ruinen aus dieser Zeit - so auch auf dem ca. 4 km{sup 2} grossen ehemaligen Reichsparteitagsgelaende. Hier leistet seit November 2001 ein Dokumentationszentrum einen Beitrag zur Aufarbeitung der Vergangenheit. (orig.)

  9. Investigations into aerobic bacterial degradation of phenol compounds in consideration of ecological and physiological parameters; Untersuchungen zum aeroben Abbau phenolischer Verbindungen durch Bakterien unter Beruecksichtigung oekologisch und physiologisch relevanter Faktoren

    Energy Technology Data Exchange (ETDEWEB)

    Rittich, S.


    In a polluted soil of an abandoned gas works site, pure bacterial cultures were isolated which were able to degrade phenol, the three cresol isomers, and 2,3-, 2,4- and 3,4-xylenol. There were also mixed populations which degraded 2,5- and 3,5-xylenol. There were no bacteria in this soil which were able to degrade 2,6-xylenol. In spite of this, it was possible for the first time to decompose 2,6-xylenol using a mixed population of three different bacterial strains from other soils. One of these was a strain identified as Myeobacterium spec.SR18 which used 2,6-xylenol as its sole source of C and energy. (orig./EF). [Deutsch] Aus einem mit Schadstoffen kontaminierten Boden eines ehemaligen Gaswerkgelaeaendes konnten Reinkulturen isoliert werden, die in der Lage waren Phenol, die drei Kresolisomere und 2,3-, 2,4- und 3,4-Xylenol abzubauen. Ein 2,5- und 3,5-Xylenolabbau durch Mischpopulationen wurde ebenfalls beobachtet. Dagegen konnten aus diesem Boden keine 2,6-Xylenol-Abbauer gewonnen werden. Der bisher erst einmal beschriebene 2,6-Xylenolabbau gelang schliesslich mit einer weiteren, aus anderen verunreinigten Standorten angereicherten, Mischpopulation, die aus drei verschiedenen Bakterienstaemmen bestand. Darunter befand sich auch ein als Mycobacterium spec.SR18 identifizierter Stamm, der 2,6-Xylenol als alleinige C- und Energiequelle verwertet. (orig./EF).

  10. „Das zweite Leben“ der Theresienstadt-Filme nach dem Zweiten Weltkrieg

    Directory of Open Access Journals (Sweden)

    Eva Strusková


    Full Text Available Das Filmmaterial, das zwischen 1942 und 1945 im Ghetto von Theresienstadt entstanden ist, galt lange Zeit als verschollen. Archivfunde und  Ergebnisse historischer Untersuchungen der letzten Jahrzehnte ermöglichen es erstmals, die Wege der einzelnen Filmfragmente nach 1945 in verschiedene internationale Archive nachzuvollziehen. Dokumente, die vor Kurzem im Archiv der ehemaligen tschechoslowakischen Staatssicherheit  StB (heute: Archiv bezpečnostních složek in Prag aufgetaucht sind, wurden zu einer neuen Informationsquelle über die Produktion des umstrittenen Propagandafilms Theresienstadt. Ein Dokumentarfilm aus dem jüdischen Siedlungsgebiet (1944-45. Sie geben Aufschluss über den  Prozess um den inoffiziellen Verkaufvon Bestandteilen des Films nach Westdeutschland, der Mitte der 1960er in Prag stattfand. In diesem Artikel wird die Nachkriegsgeschichte der Aufnahmen aus dem Ghetto von Theresienstadt, die eine der Schlüsselquellen für historische Studien und Veröffentlichungen über den Holocaust geworden sind, anhand von Archivstudien rekonstruiert. Der Artikel enthält  zwei Schautafeln zur Provenienz und Historie der Fragmente, die aufzeigen, wie und wann sie in europäische und israelische Archive gelangt sind.

  11. Flora and vegetation on dumps of uranium mining in the southern part of the former GDR

    Directory of Open Access Journals (Sweden)

    Hartmut Sänger


    Full Text Available From 1946 to 1990 an intensive uranium mining had been carried out with underground mining and also with opencast mining by the Wismut enterprise in the southern part of the former GDR. The mining activity lead also in the surroundings of Ronneburg to a permanent growth of devastated areas, among others in the form of dumps and tailings. These areas form by reason of mining-specific contaminations, extrem biotops which demand high claims on the pioneer organisms during the phase of natural first settlement. From 1990 to 1992 vegetation mappings were carried out on 15 dumps of the Thuringia mining area according to Braun-Blanquet (1964. The utilization of the computer programm Flora _D (Frank and Klotz 1990 enabled the ecological characterisation of the dumps. On the 15 investigated dumps found were 498 higher plants, belonging to 65 families. One hundred species are species with a high dominance. The number of species per dump fluctuates between 1 I and 282. Pioneer plants occur on the berms mostly in the second year after stoppage of the dumping, on the slopes after five to ten years. After nearly ten years the first step of settlement seems to be finished. Among the mechanisms of spreading dominate wind- and burdock spread. According to the form of life forms the dump species are predominantly hemicryptophytes, further therophytes, geophytes and phanerophytes.

  12. The distribution of radionuclides in the upper soil horizons in lower Saxony, Saxony and Thuringia, Germany

    International Nuclear Information System (INIS)

    Barthel, F.; Thoste, V.; Borsdorf, K.H.


    After the Chernobyl accident the Federal Institute for Geoscience and Natural Resources carried out a scintillometer and soil sampling survey to monitor the terrestrial gamma radiation in the states of Lower Saxony (1987-1988), Thuringia (1991) and Saxony (1992). Within the scope of terrestrial radiation assessment the main interest was to differentiate gamma radiation caused by geogene radionuclides from that caused by fallout nuclides or contamination from uranium mining and milling. The isoline maps show anomalous exposure rates of 100 to 60 Bq/kg in soil samples. In Thuringia and Saxony it is difficult to detect eight years after the Chernobyl accident any correlation of the regional distribution pattern of Cs-137 fallout with heavy rainfalls in May 1986. Only one anomaly in the western Erzgebirge shows the well known NNW trend, which was recognized from fallout measurements directly after the accident in Lower Saxony. No anomalous contaminations were detected around the uranium mining areas of the former WISMUT SDAG in the Ronneburger and Aue districts. The environmental exposure rates fall in the range of < 200 nGy/h. The general results indicate, that today there is no large scale contamination existent, either from fallout or from uranium mining, which could cause radiological health hazards to the population

  13. Water management. A core task of the Wismut remediation programme; Kernaufgaben des langfristigen Wassermanagements an den saechsisch-thueringischen Wismut-Standorten

    Energy Technology Data Exchange (ETDEWEB)

    Paul, Michael; Meyer, Juergen; Jenk, Ulf; Kassahun, Andrea; Schramm, Andrea; Baacke, Delf; Forbrig, Norbert; Metschies, Thomas [Wismut GmbH, Chemnitz (Germany). Bereich Ingenieurwesen/Strahlenschutz


    Water management and conventional technical water treatment are by far the most cost-intensive long-term tasks of the Wismut remediation programme. Over the medium term, there is no viable alternative to the operation of active systems to catch and treat contaminated mine waters at the Ronneburg, Schlema, Koenigstein, Poehla, Seelingstaedt and Heimsdorf sites. Based on the status quo this paper outlines the key issues of the Wismut GmbH water management strategy over the medium and long term. lt is focused primarily on achieving protection goals for potentially impacted water bodies in the surroundings of Wismut sites and on optimising associated remediation expenditure as well as on creating the prerequisites for achieving low post-remedial care and maintenance or walk-away system status over the long term. The topic of this paper is the presentation of priority tasks related to future water management at Wismut sites in Saxony and Thuringia. The reflections are based on experiences and lessons learned and take into account current statutory management requirements referring to ground and surface water bodies affected by Wismut. The paper is based on a presentation made at the International Mining Symposium WISSYM 2015 on 2nd September 2015 in Bad Schlema, Germany.

  14. Fundamentals of using bio-diesel for operating large fleets of mining equipment and building machines and the experience gained so far

    International Nuclear Information System (INIS)

    Drebenstedt, C.; Jauer, J.


    Against the topical background of the finite reserves of fossil mineral oil as well as internationally available vegetable fat and oil resources, of the current developments in the field of the biodiesel production technology and of the international conditions for the reduction of CO 2 emissions, this paper is to examine, whether the suitability of bio-diesel for fuelling mining equipment has come true. The examination will focus on the biogenic fuel profile, on the organizational necessity to actively retrofit the machinery during operations as well as on the precise verification of the expected technical conversion problems and of the saving potentials actually achieved. The examination will be conducted in the world's first open-cast mine that has converted its entire fleet of equipment to be fuelled with bio-diesel. The open-cast mine is operated by the Ronneburg branch of Wismut GmbH, a company based in Germany (referred to hereinafter as the Lichtenberg open-cast mine). (orig.)

  15. Water management. A core task of the Wismut remediation programme

    International Nuclear Information System (INIS)

    Paul, Michael; Meyer, Juergen; Jenk, Ulf; Kassahun, Andrea; Schramm, Andrea; Baacke, Delf; Forbrig, Norbert; Metschies, Thomas


    Water management and conventional technical water treatment are by far the most cost-intensive long-term tasks of the Wismut remediation programme. Over the medium term, there is no viable alternative to the operation of active systems to catch and treat contaminated mine waters at the Ronneburg, Schlema, Koenigstein, Poehla, Seelingstaedt and Heimsdorf sites. Based on the status quo this paper outlines the key issues of the Wismut GmbH water management strategy over the medium and long term. lt is focused primarily on achieving protection goals for potentially impacted water bodies in the surroundings of Wismut sites and on optimising associated remediation expenditure as well as on creating the prerequisites for achieving low post-remedial care and maintenance or walk-away system status over the long term. The topic of this paper is the presentation of priority tasks related to future water management at Wismut sites in Saxony and Thuringia. The reflections are based on experiences and lessons learned and take into account current statutory management requirements referring to ground and surface water bodies affected by Wismut. The paper is based on a presentation made at the International Mining Symposium WISSYM 2015 on 2nd September 2015 in Bad Schlema, Germany.

  16. Impact of biostimulated redox processes on metal dynamics in an iron-rich creek soil of a former uranium mining area. (United States)

    Burkhardt, Eva-Maria; Akob, Denise M; Bischoff, Sebastian; Sitte, Jana; Kostka, Joel E; Banerjee, Dipanjan; Scheinost, Andreas C; Küsel, Kirsten


    Understanding the dynamics of metals and radionuclides in soil environments is necessary for evaluating risks to pristine sites. An iron-rich creek soil of a former uranium-mining district (Ronneburg, Germany) showed high porewater concentrations of heavy metals and radionuclides. Thus, this study aims to (i) evaluate metal dynamics during terminal electron accepting processes (TEAPs) and (ii) characterize active microbial populations in biostimulated soil microcosms using a stable isotope probing (SIP) approach. In biostimulated soil slurries, concentrations of soluble Co, Ni, Zn, As, and unexpectedly U increased during Fe(III)-reduction. This suggests that there was a release of sorbed metals and As during reductive dissolution of Fe(III)-oxides. Subsequent sulfate-reduction was concurrent with a decrease of U, Co, Ni, and Zn concentrations. The relative contribution of U(IV) in the solid phase changed from 18.5 to 88.7% after incubation. The active Fe(III)-reducing population was dominated by delta-Proteobacteria (Geobacter) in (13)C-ethanol amended microcosms. A more diverse community was present in (13)C-lactate amended microcosms including taxa related to Acidobacteria, Firmicutes, delta-Proteobacteria, and beta-Proteobacteria. Our results suggested that biostimulated Fe(III)-reducing communities facilitated the release of metals including U to groundwater which is in contrast to other studies.

  17. Microbial links between sulfate reduction and metal retention in uranium- and heavy metal-contaminated soil. (United States)

    Sitte, Jana; Akob, Denise M; Kaufmann, Christian; Finster, Kai; Banerjee, Dipanjan; Burkhardt, Eva-Maria; Kostka, Joel E; Scheinost, Andreas C; Büchel, Georg; Küsel, Kirsten


    Sulfate-reducing bacteria (SRB) can affect metal mobility either directly by reductive transformation of metal ions, e.g., uranium, into their insoluble forms or indirectly by formation of metal sulfides. This study evaluated in situ and biostimulated activity of SRB in groundwater-influenced soils from a creek bank contaminated with heavy metals and radionuclides within the former uranium mining district of Ronneburg, Germany. In situ activity of SRB, measured by the (35)SO(4)(2-) radiotracer method, was restricted to reduced soil horizons with rates of metals were enriched in the solid phase of the reduced horizons, whereas pore water concentrations were low. X-ray absorption near-edge structure (XANES) measurements demonstrated that approximately 80% of uranium was present as reduced uranium but appeared to occur as a sorbed complex. Soil-based dsrAB clone libraries were dominated by sequences affiliated with members of the Desulfobacterales but also the Desulfovibrionales, Syntrophobacteraceae, and Clostridiales. [(13)C]acetate- and [(13)C]lactate-biostimulated soil microcosms were dominated by sulfate and Fe(III) reduction. These processes were associated with enrichment of SRB and Geobacteraceae; enriched SRB were closely related to organisms detected in soils by using the dsrAB marker. Concentrations of soluble nickel, cobalt, and occasionally zinc declined uranium increased in carbon-amended treatments, reaching metal attenuation and (ii) the fate of uranium mobility is not predictable and may lead to downstream contamination of adjacent ecosystems.

  18. A time-series phytoremediation experiment with sunflowers (Helianthus annuus on a former uranium mining site

    Directory of Open Access Journals (Sweden)

    Kötschau A.


    Full Text Available On a test field situated at a former uranium mining site near Ronneburg (Thuringia, Germany a small scale time-series field experiment with sunflowers (Helianthus annuus was carried out. This area ghas elevated contents for the heavy metals Cd, Co, Cr, Cu, Ni, Zn including the radionuclides U and Th. Over a time period of 24 weeks the sunflowers were cultivated on homogenized soil substrate and regularly harvested. The aim was to find the ideal moment to harvest the sunflowers, being defined as having the best balance between the extraction of the contaminants and a high biomass produced. The contents of the elements were determined in soil, roots and above-ground plant parts. The contents in the above-ground plant showed no clear increasing or decreasing trend over time, so they were not the appropriate values to determine the best moment to harvest. Instead the total extracted masses (content in μg/g x biomass in g of the contaminants in the above-ground plant parts were calculated. According to this the best moment to harvest the sunflower plants was reached after 24 weeks of vegetation, because the highest extracted masses for all contaminants were calculated to this time. Additionally the biomass, which could be used e.g. for bio-fuel production, was highest at this time.

  19. Limb-sparing management with surgical resection, external-beam and intraoperative electron-beam radiation therapy boost for patients with primary soft tissue sarcoma of the extremity. A multicentric pooled analysis of long-term outcomes

    Energy Technology Data Exchange (ETDEWEB)

    Calvo, Felipe A. [Hospital General Universitario Gregorio Maranon, Department of Oncology, Madrid (Spain); Complutense University, School of Medicine, Madrid (Spain); Sole, Claudio V. [Hospital General Universitario Gregorio Maranon, Department of Oncology, Madrid (Spain); Complutense University, School of Medicine, Madrid (Spain); Instituto de Radiomedicina, Service of Radiation Oncology, Santiago (Chile); Polo, Alfredo; Montero, Angel [Hospital Universitario Ramon y Cajal, Service of Radiation Oncology, Madrid (Spain); Cambeiro, Mauricio; Martinez-Monge, Rafael [Clinica Universidad de Navarra, Service of Radiation Oncology, Pamplona (Spain); Alvarez, Ana [Hospital General Universitario Gregorio Maranon, Service of Radiation Oncology, Madrid (Spain); Cuervo, Miguel [Hospital General Universitario Gregorio Maranon, Service of Orthopedics and Traumatology, Madrid (Spain); Julian, Mikel San [Clinica Universidad de Navarra, Service of Orthopedics and Traumatology, Pamplona (Spain)


    bestaetigtem primaeren STS der Extremitaeten ohne Fernmetastasierung, welche nach radikaler extremitaetenerhaltenden Operation eine externe Radiotherapie (mediane Dosis 45 Gy) in Kombination mit einer IOERT (mediane Dosis 12,5 Gy) erhielten. In einem Zeitraum von 1986-2012 wurden insgesamt 159 Patienten ausgewertet. Bei einer medianen Nachbeobachtungszeit von 53 Monaten (Spanne 4-316 Monate) wurde eine Lokalkontrolle (LC) nach 5 Jahren von 82 % errechnet. Die 5-Jahres-Raten der LC innerhalb des IOERT-Felds, das krankheitsfreie Ueberleben (DFS) und das Gesamtueberleben (OS) lagen entsprechend bei 86, 62 und 72 %. In multivariaten Analysen erwiesen sich lediglich mikroskopisch positive Resektionsraender (R1) als signifikant praediktiv hinsichtlich der LC (HR 5,20; p < 0,001). Innerhalb des ehemaligen IOERT-Felds zeigte in der multivariaten Analyse neben der inkompletten Resektion (HR 4,88; p = 0,001) auch die hoehere IOERT-Dosis ≥ 12,5 Gy (HR 0,32; p = 0,02) einen statistisch signifikanten Einfluss. Die Ergebnisse aus dieser multiinstitutionellen Analyse lassen den Schluss zu, dass IOERT-Dosen ≥ 12,5 Gy die lokale Kontrollrate im ehemaligen IOERT-Bestrahlungsfeld erhoehen, bei jedoch insgesamt moderatem DFS aufgrund des hohen Metastasierungsrisikos bei dieser Art der Sarkomerkrankung. Diese Behandlungsoption zur intensivierten Erhoehung der LC sollte mit effizienterer konkomitanter, neo- und adjuvanter Systemtherapie weiter untersucht werden. (orig.)

  20. Development and trial of methods and design concepts for an ecological recultivation of former mining areas, located in certain littoral and terrestrial areas of the Goitzsche, district of Bitterfeld, state Sachsen-Anhalt. Final report; Entwicklung und Erprobung von Methoden und Gestaltungskonzepten zur oekologisch vertraeglichen Sanierung von Bergbaufolgelandschaften in ausgewaehlten litoralen und terrestrischen Bereichen des Tagebaus Goitzsche im Landkreis Bitterfeld. Schlussbericht und Anlagen 1-12

    Energy Technology Data Exchange (ETDEWEB)

    Haenel, K.; Herbst, F.; Mueller, E.; Prautzsch, I.


    der Bergbaufolgelandschaft Goitzsche (Bitterfeld/Sachsen-Anhalt) wurden Zielarten fuer die Uferbereiche bestimmt. Es wurde ein Gestaltungskonzept fuer diese Uferbereiche erarbeitet und teilweise realisiert, mit dem die besonderen Lebensraumansprueche der Zielarten erreicht werden koennen. Auf Grund nicht vorhersehbarer Verzoegerungen im Flutungsregime fuer den ehemaligen Tagebau konnte das Vorhaben nicht vollstaendig umgesetzt werden. Mit dem Vorhaben wurden Planungsgrundlagen fuer die Sanierung von Bergbaufolgelandschaften zur Verfuegung gestellt. (orig.)

  1. Experimental and theoretical investigation of the pressurized coal dust furnace of RWTH Aachen; Experimentelle und theoretische Untersuchungen an der Druckkohlenstaubfeuerung der RWTH Aachen

    Energy Technology Data Exchange (ETDEWEB)

    Renz, U. [Technische Hochschule Aachen (Germany). Lehrstuhl fuer Waermeuebertragung und Klimatechnik


    The contribution presents first results and activities funded by the BMBF, the MSWWF of Nordrhein-Westfalen, and the RWTH Aachen. The main component of the Dorsten plant is the pressure chamber which was designed and constructed in close cooperation with Messrs. L. und C. Steinmueller. The combustion chamber was installed inside the pressure vessel of the former pressurized fluidized bed steam generator of the heating power station of the RWTH Aachen. The combustion chamber is designed for a thermal power of 400 kW, corresponding to a coal mass flow of about 50 kg/h, at a pressure of 12 bar and temperatures up to 1700 degrees centigrade in melting chamber operation. It is vertical, with an inner diameter of about 400 mm, an axially movable roof burner, and four points for optical access. [Deutsch] Die Auslegung des Brenners un der Brennkammer fuer die Druckkohlenstaubfeuerung (DKSF) in Hinblick auf eine vollstaendige und stabile Verbrennung bei moeglichst geringen Emissionen an Schadgasen und Aschepartikeln war dagegen nicht primaeres Ziel des Verbundvorhabens in Dorsten. Dieses Thema wird in enger Abstimmung mit den Dorstener Aktivitaeten an einer Versuchsanlage der RWTH Aachen angegangen. Ueber die ersten Ergebnisse und die geplanten Arbeiten, die vom BMBF, vom MSWWF des Landes NRW und der RWTH Aachen gefoerdert werden, soll im Beitrag berichtet werden. Die Hauptkomponente der DKSF-Anlage ist die Druckkammer, die in enger Zusammenarbeit mit der Firma L. und C. Steinmueller ausgelegt und aufgebaut wurde. Die Aufstellung der Brennkammer im Druckbehaelter des ehemaligen Druckwirbelschicht-Dampferzeugers im Heizkraftwerk der RWTH Aachen wird aufgezeigt. Die Brennkammer ist fuer eine thermische Leistung von 400 kW, entsprechend einem Kohlenmassestrom von etwa 50 kg/h, bei einem Druck von 12 bar und fuer Temperaturen bis zu 1.700 C bei Schmelzkammerbetrieb ausgelegt. Sie ist als stehender Druckbehaelter mit einem Innendurchmesser von ca. 400 mm, einem axial

  2. 25 Jahre Empowerment der Frau 25 Years of Female Empowerment

    Directory of Open Access Journals (Sweden)

    Sarah Wittkopp


    Full Text Available Anlässlich des 25-jährigen Jubiläums des Ausschusses des Übereinkommens zur Beseitigung jeder Form von Diskriminierung der Frau (United Nations Convention on the Elimination of All Forms of Discrimination against Women, CEDAW wird in dem Buch The Circle of Empowerment eine Bilanz der Arbeit des Vertragsorgans gezogen. Herausgegeben von Hanna Beate Schöpp-Schilling, dem deutschen Mitglied im CEDAW-Ausschuss seit 1989, und Cees Flinterman, dem niederländischen Mitglied seit 2003, enthält der Band Essays und persönliche Reflexionen von ehemaligen oder gegenwärtigen Mitgliedern des CEDAW-Ausschusses und UN-Mitarbeitern. Das Buch eignet sich als Einstieg in und Überblick über die Frauenrechtskonvention für Frauenrechtler/-innen, Wissenschaftler/-innen und Studierende, da es ein differenziertes Bild der Konvention, ihrer Mechanismen und ihrer Umsetzungsprobleme zeichnet. Gleichzeitig werden Hintergründe der tatsächlichen Arbeit eines Vertragsorgans beleuchtet, die sonst verschlossen bleiben.In celebration of the 25-year anniversary of the United Nations Convention on the Elimination of All Forms of Discrimination against Women (CEDAW, the book The Circle of Empowerment analyses the results of the work of this treaty institution. The volume, edited by Hanna Beate Schöpp-Schilling, German member in the CEDAW-commission since 1989, and Cees Flinterman, Dutch member since 2003, contains essays and personal reflections from former and current members of the CEDAW-commission and UN staff. The book is an appropriate introduction into and overview of the convention on women’s rights for activists, scholars, and students because it sketches a differentiated image of the convention, its mechanisms, and problems of implementation. At the same time, the book illuminates the background issues of the treaty institution’s actual work, something that normally remains secret.

  3. Conflict Resolution in Aceh in Light of Track One and a Half Diplomacy

    Directory of Open Access Journals (Sweden)

    Robert M. Heiling


    Full Text Available This paper analyzes the role of mediators in the resolution of the Aceh conflict within the framework of a three-step process. Two separate mediation efforts, one conducted by the Centre for Humanitarian Dialogue from 1999 until 2003 and a second one led by Martti Ahtisaari and his Crisis Management Initiative in 2004/2005, attempted to solve the Aceh confl ict. The author shows that beside contextual factors such as ripeness of the conflict and advantageous relations between and characteristics of the conflict parties, the success of Ahtisaari’s engagement can be further explained by procedural factors. These include mediator behaviour and mediation strategies. Furthermore the mediator’s ability to use contacts with official track one actors was crucial in securing the signing as well as the implementation of the present peace agreement. ----- Der Artikel analysiert die Rolle von Mediatoren in der Lösung des Aceh Konfl ikts mittels eines drei-Phasen Modells von Konfliktlösung. Zwei voneinander unabhängige Mediationsverfahren, jenes des Centre for Humanitarian Dialogue von 1999 bis 2003, und ein weiteres geleitet durch Martti Ahtisaari und seiner Crisis Management Initiative in 2004/2005, zielten darauf ab den Konflikt zu lösen. Der Autor zeigt, dass neben kontextuellen Faktoren wie einer “ripeness” des Konflikts sowie günstigen Veränderungen auf Seite der Konfliktparteien, prozedurale Faktoren für den Erfolg Ahtisaaris entscheidend waren. Diese Faktoren beziehen sich auf das Agieren und die Strategien des Mediators. Die Fähigkeit des Mediators, Kontakte zu offiziellen “track one” Akteuren aktiv während des Mediationsprozesses zu nutzen, bildete einen Schlüsselfaktor darin einen Friedensschluss und im weiteren Verlauf eine weitgehend erfolgreiche Umsetzung des aktuellen Abkommens zwischen den ehemaligen Konfliktparteien zu erreichen.

  4. Das Internet als Medium für Demokratisierung und Verständnisbildung - Beispiel Bosnien-Herzegowina

    Directory of Open Access Journals (Sweden)

    Michael Reimann


    Full Text Available "Politik und Internet" ist ein weites Feld für praktische Anwendungsversuche wie für wissenschaftliche Begleitforschung geworden. Der Artikel untersucht, inwieweit Informations- und Kommunikationstechnologien (IKT im allgemeinen und das "World Wide Web" im besonderen in einem vom Krieg zerrissenen Land wie Bosnien-Herzegowina im Sinne von "peacebuilding" für Demokratisierung und Verständigung zwischen den (ehemaligen Konfliktparteien eingesetzt werden können. Aus Ansätzen der Friedens- und Konfliktforschung, sowie der Informationswissenschaft werden dazu Kriterien abgeleitet, die für einen adäquaten Einsatz des Internets erfüllt sein sollten, bzw. aus denen abgeleitet werden kann, wie Internetangebote gestaltet sein sollten, damit sie entsprechend wirken können. Im empirischen Teil wird zunächst die Problematik des "Allgemeinen Zugangs" zum Internet in Bosnien-Herzegowina dargestellt, indem Daten zur Telekommunikationsinfrastruktur und zur Verbreitung und Nutzung des Internets gegeben und Projekte zur Verbesserung der Situation vorgestellt werden. Im weiteren werden die entwickelten Kriterien an ausgewählte IKT-Projekte und Internet-Homepages nationaler und internationaler Institutionen und Organisationen angelegt, die an Demokratisierung und Verständnisbildung beteiligt sind. Als Beispiel für "bad practice" wird die Homepage des "Office of the High Representative" der Vereinten Nationen dargestellt, da diese Website fast ausschliesslich in englischer Sprache gehalten und somit für bosnische Bürger nahezu unzugänglich ist. Als Beispiele für "good practice" - zumindest in bezug auf bestimmte Kriterien - können die Homepages der bosnischen Zentralbank, der "Mine Action Centers", sowie der OSZE Mission in Bosnien-Herzegowina gelten. Das im Bereich Bildung angesiedelte Projekt "D@dalos" deckt so gut wie alle entwickelten Kriterien ab; es ist konfliktlösungsorientiert und kann somit als ein echtes "Demokratisierungsprojekt" gelten

  5. Wind energy. From the garage workshop to a global market. 25 years scientific accompaniment; Windenergie - von der Garagen-Werkstatt zum Weltmarkt. 25 Jahre wissenschaftliche Begleitung

    Energy Technology Data Exchange (ETDEWEB)

    Hahn, Berthold; Stuebig, Cornelia [Fraunhofer Institut fuer Windenergie und Energiesystemtechnik (IWES), Kassel (Germany); Ponick, Bernd [Fraunhofer Institut fuer Windenergie und Energiesystemtechnik (IWES), Kassel (Germany); Hannover Univ. (Germany); Keller, Sarina [DLR Deutsches Zentrum fuer Luft- und Raumfahrt e.V., Koeln (Germany); Felder, Martin; Jachmann, Henning [Zentrum fuer Sonnenenergie- und Wasserstoff-Forschung Baden-Wuerttemberg (ZSW), Stuttgart (Germany)


    The plant technology for the use of wind energy on land is so sophisticated that the WEA can be operated as ''normal'' power plants to the grid. Of course, there are still potential for development, for example, in terms of improved reliability, or concerning the fledgling offshore use, always with an emphasis on the simultaneous reduction in costs. Although from the former garages workshops is little remaining, the production techniques are another major issue in terms of quality and costs. The cost of electricity from wind energy is taking account of external costs are already competitive with conventional power generation. To limit the costs of the energy transition one to expect from the wind energy as of the other technologies cost reduction. Various studies show that the wind energy supply in the balance is sufficient several times to provide the expected contribution to supply. [German] Die Anlagentechnologie fuer die Windenergienutzung an Land ist so ausgereift, dass die WEA als ''normale'' Kraftwerke am Netz betrieben werden koennen. Selbstverstaendlich bestehen weiterhin Entwicklungspotenziale, z. B. hinsichtlich verbesserter Zuverlaessigkeit oder bezueglich der noch jungen Offshore Nutzung, immer mit einem Augenmerk auf die gleichzeitige Kostenreduktion. Auch wenn von den ehemaligen Garagen Werkstaetten wenig uebrig geblieben ist, sind die Produktionstechniken ein weiteres wesentliches Thema bezueglich Qualitaet und Kosten. Die Kosteneffizienz der Stromerzeugung aus Windenergie ist unter Beruecksichtigung externer Kosten heute schon konkurrenzfaehig zur konventionellen Stromerzeugung. Zur Begrenzung der Kosten der Energiewende wird aber von der Windenergie wie von den anderen Technologien weiterhin eine Kostenreduktion erwartet. Diverse Studien zeigen, dass das Windenergieangebot in der Bilanz mehrfach ausreicht, um den erwarteten Beitrag zur Versorgung leisten zu koennen.

  6. Environmental remediation of the Wismut legacy and utilization of the reclaimed areas, waste rock piles and tailings ponds

    International Nuclear Information System (INIS)

    Hagen, M.; Jakubick, A.T.


    Between 1945 and reunification (1989) of Germany more than 232 000 t of U 3 O 8 has been produced in Saxony and Thuringia, East Germany. This affected an area of approximately 100 km 2 and left behind an extensive legacy of contaminated operations areas, underground and open pit mines, waste rock piles and tailings ponds. Following reunification, DM 13 billion (Euro 6.6 billion) were committed (and later revised to Euro 6.2 billion) to remediation of the liabilities and the government owned corporation, Wismut GmbH entrusted with the implementation of the Environmental Remediation (ER) of the liabilities. The prime goal of the ER Project follows from the legal requirements to abate health risks, mitigate existing and prevent future environmental damages. During the investigations and assessment of risks, development of remediation concepts, adoption of suitable technologies and work procedures as well as physical implementation of the remedial measures extensive use was made of international (mostly US and Canadian) ER experience. The extent of remedial measures was based on object-specific Environmental Assessments rather than on uniformly applied health/environmental standards. The ER workflow is more an iterative process than a linear succession of tasks, such as common for civil engineering projects. The internal (technical) parts of the problems were partly resolved by using Conceptual Site Models (CSM) for selection and prioritization of remedial measures. Reclamation of the waste rock piles is by covering in situ, relocation to a central pile or backfilling into an open pit. The backfilling of the open pit at Ronneburg with acid generating waste rock has been optimized from a geochemical point of view. For tailings ponds reclamation in form of dry landforms is being followed. To increase release (and reuse) of scrap metal from demolition, a fast and reliable method of discrimination of the non-contaminated metal has been developed. The flooding of

  7. Rare earth elements (REE) as natural and applied tracers in the catchment area of Gessental valley, former uranium mining area of Eastern Thuringia, Germany (United States)

    Buechel, G.; Merten, D.; Geletneky, J. W.; Kothe, E.


    Between 1947 and 1990 about 113.000 t of uranium were excavated at the former uranium mining site of Ronneburg (Eastern Thuringia, Germany). The legacy consists of more than 200 million m^3 of metasedimentary rocks rich in organic matter, sulfides and heavy metals originally deposited in mining heaps at the surface. The metasedimentary rocks formed under anoxic conditions about a 400 Mio. years ago are now exposed to oxic conditions. The oxidation of markasite and pyrite results in the formation of H_2SO_4. The formation of acid mine drainage (AMD) leads to high concentrations of uranium, rare earth elements (REE) and other heavy metals in surface water, seepage water and groundwater. This mobilization is due to alteration enhanced by high microbial activity and low pH. The tolerance mechanisms towards heavy metal pollution of soil substrate and surface/groundwater has allowed the selection of microbes which have, e.g. specific transporter genes and which are associated to plants in symbiotic interactions like mycorrhiza. In order to follow the processes linking alteration of metasedimentary rocks to biological systems the use of tracers is needed. One group of such tracers occuring in high concentrations in the water phase at the Ronneburg mining site are the REE (La-Lu) which are featured by very similar chemical behaviour. They show smooth but continuous variations of their chemical behaviour as a function of atomic number. For seepage water of the waste rock dump Nordhalde - sampled over a period of two years - the shale normalized REE patterns show enrichment of heavy REE and only minor variations, although the concentration differs. At sampling points in the surface water and in groundwater rather similar REE patterns were observed. Thus, REE can be used as tracers to identify diffuse inflow of REE-rich acid mine drainage of the dumps into the creek and the sediments. The absolute concentrations of REE in the creek and in ground water are up to 1000 times

  8. Iron encrustations on filamentous algae colonized by Gallionella-related bacteria in a metal-polluted freshwater stream (United States)

    Mori, J. F.; Neu, T. R.; Lu, S.; Händel, M.; Totsche, K. U.; Küsel, K.


    Filamentous macroscopic algae were observed in slightly acidic to circumneutral (pH 5.9-6.5), metal-rich stream water that leaked out from a former uranium mining district (Ronneburg, Germany). These algae differed in color and morphology and were encrusted with Fe-deposits. To elucidate their potential interaction with Fe(II)-oxidizing bacteria (FeOB), we collected algal samples at three time points during summer 2013 and studied the algae-bacteria-mineral compositions via confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectra, and a 16S and 18S rRNA gene-based bacterial and algae community analysis. Surprisingly, sequencing analysis of 18S rRNA gene regions of green and brown algae revealed high homologies with the freshwater algae Tribonema (99.9-100 %). CLSM imaging indicated a loss of active chloroplasts in the algae cells, which may be responsible for the change in color in oxidation under the putative oxygen-saturated conditions that occur in association with photosynthetic algae. Quantitative PCR (polymerase chain reaction) revealed even higher Gallionella-related 16S rRNA gene copy numbers on the surface of green algae compared to the brown algae. The latter harbored a higher microbial diversity, including some putative predators of algae. A loss of chloroplasts in the brown algae could have led to lower photosynthetic activities and reduced EPS production, which is known to affect predator colonization. Collectively, our results suggest the coexistence of oxygen-generating algae Tribonema sp. and strictly microaerophilic neutrophilic FeOB in a heavy metal-rich environment.

  9. Fast formation of supergene Mn oxides/hydroxides under acidic conditions in the oxic/anoxic transition zone of a shallow aquifer. (United States)

    Schäffner, F; Merten, D; Pollok, K; Wagner, S; Knoblauch, S; Langenhorst, F; Büchel, G


    Extensive uranium mining in the former German Democratic Republic (GDR) in eastern Thuringia and Saxony took place during the period of 1946-1990. During mining activities, pelitic sediments rich in organic carbon and uranium were processed and exposed to oxygen. Subsequent pyrite oxidation and acidic leaching lead to partial contamination of the area with heavy metals and acid mine drainage (AMD) even few years after completion of remediation. One of those areas is the former heap Gessen (Ronneburg, Germany) were the residual contamination can be found 10 m under the base of the former heap containing partly permeable drainage channels. Actually, in such a system, a rapid but locally restricted mineralization of Mn oxides takes place under acidic conditions. This formation can be classified as a natural attenuation process as certain heavy metals, e.g., Cd (up to 6 μg/g), Ni (up to 311 μg/g), Co (up to 133 μg/g), and Zn (up to 104 μg/g) are bound to this phases. The secondary minerals occur as colored layers close to the shallow aquifer in glacial sediments and could be identified as birnessite and todorokite as Mn phase. The thermodynamic model shows that even small changes in the system are sufficient to shift either the pH or the Eh in the direction of stable Mn oxide phases in this acidic system. As a consequence of 9-15-year-long formation process (or even less), the supergene mineralization provides a cost-efficient contribution for remediation (natural attenuation) strategies of residual with heavy metals (e.g., Cd, Co, Ni, Zn) contaminated substrates.

  10. Metals other than uranium affected microbial community composition in a historical uranium-mining site. (United States)

    Sitte, Jana; Löffler, Sylvia; Burkhardt, Eva-Maria; Goldfarb, Katherine C; Büchel, Georg; Hazen, Terry C; Küsel, Kirsten


    To understand the links between the long-term impact of uranium and other metals on microbial community composition, ground- and surface water-influenced soils varying greatly in uranium and metal concentrations were investigated at the former uranium-mining district in Ronneburg, Germany. A soil-based 16S PhyloChip approach revealed 2358 bacterial and 35 archaeal operational taxonomic units (OTU) within diverse phylogenetic groups with higher OTU numbers than at other uranium-contaminated sites, e.g., at Oak Ridge. Iron- and sulfate-reducing bacteria (FeRB and SRB), which have the potential to attenuate uranium and other metals by the enzymatic and/or abiotic reduction of metal ions, were found at all sites. Although soil concentrations of solid-phase uranium were high, ranging from 5 to 1569 μg·g (dry weight) soil(-1), redundancy analysis (RDA) and forward selection indicated that neither total nor bio-available uranium concentrations contributed significantly to the observed OTU distribution. Instead, microbial community composition appeared to be influenced more by redox potential. Bacterial communities were also influenced by bio-available manganese and total cobalt and cadmium concentrations. Bio-available cadmium impacted FeRB distribution while bio-available manganese and copper as well as solid-phase zinc concentrations in the soil affected SRB composition. Archaeal communities were influenced by the bio-available lead as well as total zinc and cobalt concentrations. These results suggest that (i) microbial richness was not impacted by heavy metals and radionuclides and that (ii) redox potential and secondary metal contaminants had the strongest effect on microbial community composition, as opposed to uranium, the primary source of contamination.

  11. Entering a foreign labour market via the “academic gate”. The experiences of Poles who came as international students to Germany Der Arbeitsmarkteinstieg im Anschluss an der Nachschulausbildung im Ausland. Erfahrungen polnischer Studierender in Deutschland

    Directory of Open Access Journals (Sweden)

    Nina Wolfeil


    Typologie (“Brain Circulators”, “Polonia Members”, “International Career”, “Transformation Refugees” zeigt, wie die ehemaligen internationalen Studierendem im beruflichen Leben deutsches und polnisches kulturelles Kapital nutzen. Sie identifiziert Erfolgs- und Misserfolgsgeschichten. Als Schlussfolgerung daraus sollten spezielle Programme entwickelt werden, die den Arbeitsmarktübergang internationaler Studierender im Studienland begleiten.

  12. Retrofitting of a barn under preservation order into a residential house by means of passive house construction; Umbau einer unter Denkmalschutz stehenden Scheune zu einem Wohnhaus in Passivhausbauweise

    Energy Technology Data Exchange (ETDEWEB)

    Kaeser, R. [SAINT-GOBAIN ISOVER G und H AG, Ladenburg (Germany)


    This project shows the possibilities of old building retrofitting by means of passive house construction. A peculiarity is the special requirements at building physics, static and protection of historic monuments. The project was subsidised by the companies SAINT-GOBAIN ISOVER G+H AG; SAINT-GOBAIN GLASS Germany and BASF in order to show that even historic monuments can be brought to the latest level of building technology. The barn, built in approximately 1850 in the Brundtland city Viernheim known as energy conservation city, is part of an ensemble of former tobacco barns under preservation order, which partially have already been retrofitted into residential houses, a library or into a municipal culture centre. The object was supposed to be retrofitted into a passive house with a yearly heating energy demand of 15 kWh/m{sub 2} and thus reach a passive house standard that is so far unique for such a building under preservation order. The following had to be taken into consideration (a) compliance with regulations for protection of historic monuments (b) reaching the passive house standard (c) solutions in terms of humidity protection for the visible trelliswork wall and salt-loaded natural stone wall (d) solution of special static requirements by protecting neighbouring buildings. (orig.) [German] Dieses Projekt zeigt die Moeglichkeiten einer Altbausanierung in Passivhausbauweise auf. Eine Besonderheit hierbei sind spezielle Anforderungen an die Bauphysik, der Statik und des Denkmalschutzes. Das Vorhaben wurde unterstuetzt durch die Unternehmen SAINT-GOBAIN ISOVER G+H AG, SAINT-GOBAIN GLASS Deutschland und BASF, um zu zeigen, dass auch historische Altbauten auf den neuesten Stand der Bautechnik gebracht werden koennen. Die Scheune mit einem Baujahr von ca. 1850 in der als Energiesparstadt bekannten hessischen Brundtlandstadt Viernheim ist Teil eines denkmalgeschuetztes Ensembles von ehemaligen Tabakscheunen, die z.T. schon in Wohnhaeuser, in eine Bibliothek, oder

  13. Über den Nachrichtenwert von Friedensjournalismus - Ergebnisse einer experimentellen Studie

    Directory of Open Access Journals (Sweden)

    Monika Spohrs


    Full Text Available Laut Nachrichtenwertforschung hängt die Publikations- und Lesenswürdigkeit von Nachrichtentexten von den Nachrichtenfaktoren der zu publizierenden Ereignisse ab. Als anerkannte Nachrichtenfaktoren gelten beispielsweise Negativität, Vereinfachung und Personifizierung. Friedensjournalistische Arbeiten weichen von diesen Kriterien oft ab, indem sie versuchen, die berichteten Ereignisse in ihrer Komplexität darzustellen, den Fokus nicht auf negative Ereignisse zu legen und auch strukturellen Themen Raum zu geben. Aber sind sie deshalb weniger publikationswürdig? Der folgende Artikel zeigt anhand einer experimentellen Studie, welche Akzeptanz Friedensjournalismus beim Leser finden kann, auch wenn dies teilweise den Theorien der Nachrichtenwertforschung widerspricht. Des weiteren wird gezeigt, wie sich konstruktive Berichterstattung auf die mentalen Modelle der Rezipienten auswirkt und in welchem Zusammenhang diese beiden Ergebnisse miteinander stehen. In der vorliegenden Studie wurden einer für die Leserschaft der deutschen Qualitätspresse hinsichtlich Alter und Bildungsgrad repräsentativen Stichprobe von n = 128 Versuchspersonen Zeitungsartikel zu drei verschiedenen Ereignissen im Konfliktfeld des ehemaligen Jugoslawien dargeboten. Zu jedem Ereignis wurden vier verschiedene Textvarianten verwendet: eine gemäßigt eskalationsorientierte Originalfassung aus einer deutschen Qualitätszeitung (Die Welt, Frankfurter Allgemeine Zeitung, Süddeutsche Zeitung und drei modifizierte Versionen dieser Artikel, (a mit gemäßigt deeskalations-orientiertem Framing, (b mit stark deeskalationsorientiertem Framing und (c mit einer Verschärfung der Eskalationsorientierung der dargestellten Konflikte. Die Aufgabe der Vpn bestand darin, zu jedem der drei Ereignisse eine Textvariante zu lesen und danach in eigenen Worten schriftlich wiederzugeben und anschließend einen Fragebogen zu Akzeptanz, Glaubwürdigkeit, Ausgewogenheit, Neuigkeitsgehalt, Bewertung und

  14. Results obtained with LEGe detectors applied for partial-body counting in the low-energy range (3-150 keV); Erfahrungen mit LEGe-Detektoren bei Teilkoerpermessungen im Bereich niedriger Energien (3-150 keV)

    Energy Technology Data Exchange (ETDEWEB)

    Dettmann, K. [Bundesamt fuer Strahlenschutz, Berlin (Germany)


    Due to a change in the field of duties, the Phoswich detector hitherto used for organ and partial-body scanning for measuring low-energy {gamma} radiation and X-radiation had to be replaced by a modern detector system. A key application of the new system is detection and in vivo measurement of {sup 210}Pb in the human skeleton. This method of measuring {sup 210}Pb as a long-lived daughter product of radon is applied for retrospective assessment of radiation doses emanatingfrom the radon decay chain, applied to former uranium miners (WISMUT) and members of the population living or having lived in houses with high radon concentrations. The bone activities to be expected from relevant exposures are only slightly above those of the normal {sup 210}Pb content in the bones (10-30 Bq), and the Phoswich detector system was not able to detect incorporated activity down to these low levels. The new system was also tested for its suitability and efficiency in detecting radionuclide depositions in body organs, particularly the actinides that are difficult to identify, in compliance with the relevant regulatory guide. (orig./CB) [Deutsch] In der Inkorporationsmessstelle musste auf Grund neuer Aufgabenstellungen der fuer Organ- und Teilkoerpermessungen zum Nachweis niederenergetischer {gamma}- und Roentgenstrahlung eingesetzte Phoswich-Detektor durch ein modernes Detektorsystem ersetzt werden. Ein wichtiges Einsatzgebiet des neuen Systems ist die Bestimmung von {sup 210}Pb im menschlichen Skelett ueber In-vivo-Messungen. Diese Methode der Bestimmung von {sup 210}Pb als langlebiges Folgeprodukt des Radons dient der retrospektiven Ermittlung der Exposition durch Radon-Zerfallsprodukte bei ehemaligen Uranbergleuten (WISMUT) und Personen aus der Bevoelkerung, die in Wohnhaeusern mit hohen Radonkonzentrationen leben bzw. gelebt haben. Die fuer relevante Expositionen zu erwartenden Skelettaktivitaeten liegen nur wenig ueber dem {sup 210}Pb-Normalgehalt (10-30 Bq). Mit einer

  15. Persistent organic compounds in food chains in Bavaria and Czechia. Pt. 1. Terrestrial systems; Persistente organische Verbindungen in Nahrungsketten von Bayern und Tschechien. T. 1. Terrestrische Systeme

    Energy Technology Data Exchange (ETDEWEB)

    Kettrup, A.; Heinisch, E.


    In the paper presented here single presentations concerning the contamination of soil, vegetation and organs and tissues form animals and man with persistent organic substances (DDT and metabolites, isomers of hexachlorocyclohexane, hexachlorobenzene, cyclodiene insecticides, chlorophenols, light volatile organic compounds, PCDD/F, PAH and nitromusk compounds) from Bavaria, the Czech Republic and Brandenburg/Berlin and the former GDR, respectively, were assessed, summarized and - as far as possible - compared and confronted. The results are given in the summaries of the single chapters. It could be shown that the different socioeconomic structures in the regions upto 1989 has considerable influences on the extent of the contamination. Large corpusses of law concerning the application and production of chemical products and their increasingly denser monitoring in Bavaria as well as the various sanitation measures has lead to only traces of chloroorganic compounds now and to a minimization of unavoidable substances like PCDD/F. These prerequisites have now been created in the new federal states - here the example Brandenburg - where upto 1989 the national economy was only directed at production maximization and they begin to result in a decrease of contamination especially for the classical chlorohydrocarbons. In the Czech Republic there are still mostly considerably higher loads, e.g. for HCB and especially for PCB, leading to the consideration of possible bordercrossing effects. (orig.) [Deutsch] In der vorliegenden Arbeit wurden Einzeldarstellungen zur Kontamination von Boden, Aufwuchs und von Tieren bzw. dem Menschen stammenden Organen und Geweben mit persistenten organischen Verbindungen (DDT und Metabolite, Isomeren des Hexachlorcyclohexans, Hexachlorbenzol, Cyclodien-Insektizide, Chlorphenole, leichtfluechtige organische Verbindungen, PCDD/F, PAK und Nitromoschusverbindungen) aus Bayern, Tschechien und Brandenburg-Berlin bzw. der ehemaligen DDR ausgewertet

  16. Novel Method to Assess the Risk of Dam Failure

    Directory of Open Access Journals (Sweden)

    Qinli Yang


    Full Text Available A new flexible, rapid and affordable risk assessment procedure was developed and verified for dams based on case studies in Scotland (UK and the region of Baden (Germany. A database of six different sustainable flood retention basin (SFRB types with varying flood control potential has been developed. In Scotland, there are a relatively high number of current and former large drinking water reservoirs which could contribute to flood management control. In comparison, purpose-built and relatively small SFRB, which are predominantly used for flood control, dominate the landscape in Baden. Moreover, 13 out of 149 SFRB have recently been upgraded, and 11 new SFRB have been built since 2006. Both the estimated hazard and risk are small in comparison to those found in the flood infrastructure in Scotland. The study assesses a rapid screening tool developed to estimate the Dam Condition and the corresponding Dam Failure Hazard and Dam Failure Risk. Most SFRB in Baden have a relatively poor Dam Condition, high Dam Failure Hazard but low Dam Failure Risk compared to those in Scotland. Findings show that Baden is more advanced in flood defence management as well as adaptation to climate change.Deutscher Titel: Neue Methode zur Beurteilung des Risikos eines DammbruchesZusammenfassung: Eine neue, flexible, schnelle und preisgünstige Methode zur Risokobeurteilung von Dämmen wurde entwickelt und getestet, die auf Fallbeispielen in Schottland (Vereinigtes Königreich und der Region Baden (Deutschland basiert. Eine Datenbank von sechs verschiedenen Typen nachhaltiger Hochwasserrückhaltebecken (NHRB mit unterschiedlichem Hochwasserrückhaltevermögen wurde entwickelt. Eine relativ hohe Anzahl von gegenwärtigen und ehemaligen großen Trinkwassertalsperren, die zur Hochwasserschutzkontolle verwandt werden könnten, befinden sich in Schottland. Zweckmäßig gebaute und relativ kleine NHRB, die hauptsächlich für den Hochwasserschutz verwendet werden, dominieren

  17. Flora and vegetation on dumps of uranium mining in the southern part of the former GDR

    International Nuclear Information System (INIS)

    Saenger, H.


    From 1946 to 1990 an intensive uranium mining had been carried out with underground mining and also with opencast mining by the Wismut enterprise in the southern part of the former GDR. The mining activity lead also in the surroundings of Ronneburg to a permanent growth of devastated areas, among others in the form of dumps and tailings. These areas from by reason of mining-specific contaminations, extreme biotops which demand high claims on the pioneer organisms during the phase of natural first settlement. From 1990 to 1992 vegetation mappings were carried out on 15 dumps of the Thuringia mining area according to Braun-Blanquet (1964). The utilization of the computer program Flora D enabled the ecological characterization of the dumps. On the 15 investigated dumps found were 498 higher plants, belonging to 65 families. One hundred species are species with a high dominance. The number of species per dump fluctuates between 11 and 282. Pioneer plants occur on the berms mostly in the second year after stoppage of the dumping, on the slopes after five to ten years. After nearly ten years the first step of settlement seems to be finished. Among the mechanisms of spreading dominate wind- and burdock spread. According to the form of life forms the dump species are dominantly hemicryptophytes, further therophypes, geophytes and phanerophytes. Biological radiation investigations were performed using the honeybee (Apis mellifera) as bioindicator. The radioactivity in bee products was determined by means of gamma-ray spectrometry. The results show that the radioactivity in honey is twice to three times as high as in that from unpolluted control areas. Nonetheless, the level of honey radioactivity observed in the studied area does not endanger human health. Also the contents of radionuclides from the fission of uranium (U-235, U-238, Ra-226, Pb-210, Po-210 and Ra-228) in plants were determined. The effective equivalent dose for adults through different paths of exposure was

  18. Formation of secondary minerals in a lysimeter approach - A mineral-microbe interaction (United States)

    Schäffner, F.; Merten, D.; De Giudici, G.; Beyer, A.; Akob, D. M.; Ricci, P. C.; Küsel, K.; Büchel, G.


    Heavy metal contamination of large areas due to uranium mining operations poses a serious long-term environmental problem. In the Ronneburg district (eastern Thuringia, Germany), leaching of low grade uranium bearing ores (uranium content metals, especially Cd, Ni, Co, Cu and Zn due to a residual contamination even after remediation efforts. To reveal the processes of secondary mineral precipitation in the field a laboratory lysimeter approach was set up under in situ-like conditions. Homogenized soil from the field site and pure quartz sand were used as substrates. In general, in situ measurements of redox potentials in the substrates showed highly oxidizing conditions (200-750 mV). Water was supplied to the lysimeter from below via a mariottés bottle containing contaminated groundwater from the field. Evaporation processes were allowed, providing a continuous flow of water. This led to precipitation of epsomite and probably aplowite on the top layer of substrate, similar to what is observed in field investigations. After 4 weeks, the first iron and manganese bearing secondary minerals became visible. Soil water samples were used to monitor the behaviour of metals within the lysimeter. Saturation indices (SI) for different secondary minerals were calculated with PHREEQC. The SI of goethite showed oversaturation with respect to the soil solution. SEM-EDX analyses and IR spectroscopy confirmed the formation of goethite. Geochemical data revealed that goethite formation was mainly dominated by Eh/pH processes and that heavy metals, e.g. Zn and U, could be enriched in this phase. Although Eh/pH data does not support formation of manganese minerals, Mn(II)-oxidizing bacteria (MOB) could be isolated from field soil samples, supporting the fact that microorganisms may influence this natural attenuation process. Laser ablation ICP-MS data reveal accumulation of manganese in MOB biomass on Mn(II)-containing agar plates. Furthermore, it was possible to show the importance

  19. Biogenic precipitation of manganese oxides and enrichment of heavy metals at acidic soil pH (United States)

    Mayanna, Sathish; Peacock, Caroline L.; Schäffner, Franziska; Grawunder, Anja; Merten, Dirk; Kothe, Erika; Büchel, Georg


    The precipitation of biogenic Mn oxides at acidic pH is rarely reported and poorly understood, compared to biogenic Mn oxide precipitation at near neutral conditions. Here we identified and investigated the precipitation of biogenic Mn oxides in acidic soil, and studied their role in the retention of heavy metals, at the former uranium mining site of Ronneburg, Germany. The site is characterized by acidic pH, low carbon content and high heavy metal loads including rare earth elements. Specifically, the Mn oxides were present in layers identified by detailed soil profiling and within these layers pH varied from 4.7 to 5.1, Eh varied from 640 to 660 mV and there were enriched total metal contents for Ba, Ni, Co, Cd and Zn in addition to high Mn levels. Using electron microprobe analysis, synchrotron X-ray diffraction and X-ray absorption spectroscopy, we identified poorly crystalline birnessite (δ-MnO2) as the dominant Mn oxide in the Mn layers, present as coatings covering and cementing quartz grains. With geochemical modelling we found that the environmental conditions at the site were not favourable for chemical oxidation of Mn(II), and thus we performed 16S rDNA sequencing to isolate the bacterial strains present in the Mn layers. Bacterial phyla present in the Mn layers belonged to Firmicutes, Actinobacteria and Proteobacteria, and from these phyla we isolated six strains of Mn(II) oxidizing bacteria and confirmed their ability to oxidise Mn(II) in the laboratory. The biogenic Mn oxide layers act as a sink for metals and the bioavailability of these metals was much lower in the Mn layers than in adjacent layers, reflecting their preferential sorption to the biogenic Mn oxide. In this presentation we will report our findings, concluding that the formation of natural biogenic poorly crystalline birnessite can occur at acidic pH, resulting in the formation of a biogeochemical barrier which, in turn, can control the mobility and bioavailability of heavy metals in

  20. Dominance of 'Gallionella capsiferriformans' and heavy metal association with Gallionella-like stalks in metal-rich pH 6 mine water discharge (United States)

    Fabisch, Maria; Freyer, Gina; Johnson, Carol A.; Buchel, Georg; Akob, Denise M.; Neu, Thomas R.; Kusel, Kirsten


    Heavy metal-contaminated, pH 6 mine water discharge created new streams and iron-rich terraces at a creek bank in a former uranium-mining area near Ronneburg, Germany. The transition from microoxic groundwater with ~5 mm Fe(II) to oxic surface water may provide a suitable habitat for microaerobic iron-oxidizing bacteria (FeOB). In this study, we investigated the potential contribution of these FeOB to iron oxidation and metal retention in this high-metal environment. We (i) identified and quantified FeOB in water and sediment at the outflow, terraces, and creek, (ii) studied the composition of biogenic iron oxides (Gallionella-like twisted stalks) with scanning and transmission electron microscopy (SEM, TEM) as well as confocal laser scanning microscopy (CLSM), and (iii) examined the metal distribution in sediments. Using quantitative PCR, a very high abundance of FeOB was demonstrated at all sites over a 6-month study period. Gallionella spp. clearly dominated the communities, accounting for up to 88% ofBacteria, with a minor contribution of other FeOB such as Sideroxydans spp. and ‘Ferrovum myxofaciens’. Classical 16S rRNA gene cloning showed that 96% of the Gallionella-related sequences had ≥97% identity to the putatively metal-tolerant ‘Gallionella capsiferriformans ES-2’, in addition to known stalk formers such as Gallionella ferruginea and Gallionellaceae strain R-1. Twisted stalks from glass slides incubated in water and sediment were composed of the Fe(III) oxyhydroxide ferrihydrite, as well as polysaccharides. SEM and scanning TEM-energy-dispersive X-ray spectroscopy revealed that stalk material contained Cu and Sn, demonstrating the association of heavy metals with biogenic iron oxides and the potential for metal retention by these stalks. Sequential extraction of sediments suggested that Cu (52–61% of total sediment Cu) and other heavy metals were primarily bound to the iron oxide fractions. These results show the importance of

  1. On the chemical identification and visualization of uranium species in biofilms and Euglena mutabilis cells; Zur chemischen Identifizierung und Visualisierung von Uran-Spezies in Biofilmen und Euglena mutabilis Zellen

    Energy Technology Data Exchange (ETDEWEB)

    Brockmann, Sina


    For risk assessment of anthropogenic uranium contaminations in the environment a detailed knowledge of the migration and immobilization behavior is required to prevent health hazards for humans and animals caused by an uncontrolled discharge of uranium. Hence, comprehensive studies on the interactions of uranium with the environment are required. Besides the influences of the geological materials, there is a huge effect of the biosphere, especially the interactions with microorganisms and biofilms, on the properties of uranium in the environment. The aim of this study was to investigate and to describe naturally occurring biofilms from real uranium contaminated areas and their influence on the uranium migration. The investigations in this study on the localization and the speciation of the uranium in the biosystems were primarily done with a coupled system of laser scanning microscopy (CLSM) and laser induced fluorescence spectroscopy (LIFS). Natural biofilms collected from two uranium contaminated acid mine drainage (AMD) environments, the former uranium mine in Koenigstein (Saxony, Germany) and the former Gessenheap near Ronneburg (Thuringia,Germany), were investigated in this study. The chosen samples represent typical biofilm communities living in AMD water and are exemplary for potentially occurring scenarios of contaminated mining water both in the underground and on the surface. The investigation on the interactions between uranium and Euglena mutabilis, which is a typical unicellular microorganism that can be found in acidic, uranium and other heavy metal containing waters, was another important part of this study. Bioaccumulation experiments of uranium on living Euglena mutabilis cells depending on the pH (pH 3 - 6) and on the background media in sodium perchlorate (9 g/l) or sodium sulfate (3.48 g/l) solution containing 0.01 mM uranium show an effective immobilization of uranium. At the acidic pH-values (pH 3 - 4) over 90 % of the added uranium was

  2. Radiotherapy in desmoid tumors. Treatment response, local control, and analysis of local failures

    Energy Technology Data Exchange (ETDEWEB)

    Santti, Kirsi; Beule, Annette; Tuomikoski, Laura; Jaeaeskelaeinen, Anna-Stina; Saarilahti, Kauko; Tarkkanen, Maija; Blomqvist, Carl [Helsinki University Hospital and University of Helsinki, Comprehensive Cancer Center, Helsinki (Finland); Roenty, Mikko [HUSLAB and University of Helsinki, Department of Pathology, Helsinki (Finland); Ihalainen, Hanna [Helsinki University Hospital and University of Helsinki, Department of Plastic Surgery, Helsinki (Finland)


    zwischen 1987 und 2012 mit 49 Strahlentherapien behandelt wurden. Das Ansprechen wurde anhand der radiologischen Aufnahmen neu beurteilt und der Behandlungserfolg gemaess RECIST-1.1-Kriterien registriert. Fuer Patienten mit Lokalrezidiv wurde die Dosisverteilung der Radiotherapie durch Fusion von diagnostischen CT- und MRT-Bildern mit den Planungs-CT-Aufnahmen fuer jedes Lokalrezidiv bestimmt. Die Rezidive wurden je nach Lage eingeteilt in: innerhalb, am Rande und ausserhalb des ehemaligen Bestrahlungsvolumens gelegen. Prognostische Faktoren fuer ein Therapieversagen wurden ausgewertet. Die Gesamtdosen der Strahlentherapie lagen zwischen 20 und 63 Gy (Median 50 Gy) mit einer medianen Fraktionierung von 2 Gy. Die objektive Ansprechrate war 55 % (12/22 Patienten). Die mediane Zeit bis zum Therapieerfolg betrug 14 Monate. Eine statistisch signifikante Dosis-Wirkungs-Beziehung fuer die definitive und die postoperative Strahlentherapie wurde sowohl in der univariaten (p-Wert 0,002) als auch in der fuer potentielle Stoerfaktoren korrigierenden multivariaten Analyse (p-Wert 0,02) beobachtet. Neun von 11 (82 %) Lokalrezidiven wurden als Feldrandrezidive und zwei von 11 (18 %) als innerhalb des Bestrahlungsfelds liegende Rezidive bewertet. Kein Lokalrezidiv trat komplett ausserhalb des Bestrahlungsfelds auf. Die Strahlentherapie ist eine wertvolle Therapiewahl zur Behandlung aggressiver Fibromatosen. Die Strahlentherapiedosis hat einen signifikanten Einfluss auf die lokale Kontrolle. (orig.)

  3. Effects of climate dependent modifications of the local conditions on the fauna of selected coastal ecological systems of the middle Baltic Sea. Final report; Auswirkungen von klimaabhaengigen Aenderungen der Standortbedingungen auf die Fauna ausgewaehlter Kuestenoekosysteme der mittleren Ostsee. Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Mueller-Motzfeld, G.; Schultz, R.; Loch, R.; Wohlrab, B.; Cartellieri, M.; Rulik, B.


    Flaeche im Bereich Strandwallfaecher mit fuenf Bodenfallen beprobt. In beiden Jahren fanden auf den Karrendorfer Wiesen Untersuchungen der Referenzflaeche 'Aussendeichgruenland' statt, da diese Flaeche im Rahmen des Monitorings 'Renaturierung der Karrendorfer Wiesen' alljaehrlich untersucht wird. Auf beiden Untersuchungsflaechen wurde das regionale Klimageschehen und die hydrographische Situation erfasst. Ausserdem wurden an allen Fallenstandorten pedologische Parameter ermittelt: Kohlenstoffgehalt, Stickstoffgehalt, N{sub C}-Verhaeltnis, pH-Wert, Salzgehalt, Korngroesse, Wassergehalt, Feucht- und Trockenrohdichte. Fuer beide Gruppen wurden die Standorte hinsichtlich der Aktivitaets-Abundanz, der Dominanzstruktur, oekofanistischer Indices und einer Korrespondenzanalyse verglichen. Das Vorkommen der Arten wurde mit Hilfe ihrer Zonierungsindices im Hoehengradienten eingeordnet. Weiterhin wurde die Phaenologie einzelner Arten und der Gesamtzoenose dargestellt. Im Rahmen des Langzeitmonitorings 'Renaturierung der Karrendorfer Wiesen' konnte die Entwicklung der Laufkaefer und Spinnenfauna nach der Ausdeichung eines ehemaligen Kuestenueberflutungsmoores beleuchtet werden. (orig.)

  4. Primary EBV-positive Hodgkin's lymphoma of the CNS under azathioprine treatment. Case report and review of the literature

    Energy Technology Data Exchange (ETDEWEB)

    Henkenberens, Christoph; Christiansen, Hans [Medizinische Hochschule Hannover, Klinik fuer Strahlentherapie und Spezielle Onkologie, Hannover (Germany); Franzke, Anke [Medizinische Hochschule Hannover, Klinik fuer Haematologie, Haemostaseologie, Onkologie und Stammzelltransplantation, Hannover (Germany); Raab, Peter [Medizinische Hochschule Hannover, Institut fuer Diagnostische und Interventionelle Neuroradiologie, Hannover (Germany); Oschlies, Ilske; Klapper, Wolfram [Universitaetsklinikum Schleswig-Holstein, Institut fuer Pathologie, Sektion Haematopathologie, Kiel (Germany)


    Therapie und Prognose dieser seltenen Entitaet bekannt. Wir praesentieren einen entsprechenden Fallbericht mit einer Literaturuebersicht. Ein 47-jaehriger Kaukasier mit persistierendem Stirnkopfschmerz und unspezifischem Schwindel praesentierte in radiologischen Untersuchungen mehrere nodulaere Raumforderungen im Kleinhirn mit Kontakt zum 4. Ventrikel. Seine Krankengeschichte umfasste eine Multiple Sklerose, die seit 20 Jahren mit dem Immunsuppressivum Azathioprin behandelt wurde. Das weitere Staging ergab keine weiteren malignitaetsverdaechtigen Laesionen. Die tumoroesen Laesionen wurden vollstaendig reseziert. Die Immunhistopathologie zeigte ein Epstein-Barr-Virus-assoziiertes klassisches Hodgkin-Lymphom. Die diagnostische Knochenmarkpunktion ergab keinen Hinweis auf eine Lymphombeteiligung. Der Patient zeigte keine B-Symptome. Somit wurde die Lymphomerkrankung des Patienten als Stadium IE A nach der modifizierten Ann-Arbor-Klassifikation fuer Hodgkin-Lymphome klassifiziert. Der Patient erhielt postoperativ eine Chemotherapie gefolgt von einer Bestrahlung der ehemaligen Tumorregion des Kleinhirns. Er erreichte eine Komplettremission, die in der letzten Follow-up-Untersuchung nach 9 Monaten weiter anhielt. Dieser Fallbericht und die Literaturuebersicht legen nahe, dass eine multimodale Behandlung zu guten klinischen Ergebnissen bei primaer intrakraniellem Hodgkin-Lymphom fuehrt. (orig.)

  5. On the uptake and binding of uranium (VI) by the green alga Chlorella Vulgaris; Zur Aufnahme und Bindung von Uran(VI) durch die Gruenalge Chlorella Vulgaris

    Energy Technology Data Exchange (ETDEWEB)

    Vogel, Manja


    of the algae cells during the sorption experiment and a behavior analogue to initially heat killed cells. Differences in the contribution of functional groups to the uranium binding depending on the metabolic activity of the algal biomass were also shown by the difference spectra of the ATR-FTIR measurements calculated between uranium contaminated and untreated biomass. All together the spectroscopic investigations showed in case of Chlorella vulgaris a mixture of functional groups is responsible for the coordination of U(VI). The metabolic activity of the cells influences the binding of uranium under the given experimental conditions. Models of the structure of the formed U(VI)-algae complexes in dependence of the metabolic activity were created. For living algal cells, mainly carboxylic and organic phosphate groups are involved in the binding of uranium, whereas in dead algal biomass additionally inorganic phosphates are involved to some extend in the interaction of uranium with algal cells. The transferability of the obtained findings concerning the experiments in mineral medium to natural occurring mining related waters was verified exemplary with the surface water of ''Gessenwiese'' (former ''Gessenhalde'' at Ronneburg). The obtained results of this study contribute to the prediction of the migration behavior of uranium under environmental conditions, the radiological risk assessment of geogenic and anthropogenic appearing uranium and a reliable estimation of the accumulation of uranium in the food chain.

  6. EAG Eminent Speaker: Cold war biogeochemistry: Microbes as architects for metal attenuation (United States)

    Küsel, K.


    Legacy uranium mining in the area of Ronneburg, Germany, has resulted in extensive outflow of highly heavy metal contaminated ground and upcoming mine waters. Mine water flows along a grassland into a small creek and forms iron-rich precipitates yielding rust-colored terraces at the creek bank. These iron oxyhydroxides could have been formed by iron oxidizing bacteria (FeOB) or by chemical oxidation. Precipitates may serve as important biogeochemical interfaces, because heavy metals can adsorb or co-precipitate with Fe(II) or Fe(III) minerals. Thus, microbial Fe(II) oxidation but also the reductive dissolution of iron oxides can be important processes affecting the stability of metal contaminants. Here we present a study on the potential for iron cycling processes and on indigenous bacterial communities in this acidic creek. Oxic and anoxic in vitro sediment incubations revealed iron oxidation and reduction rates of same magnitude, indicating active iron cycling regardless of pH. XRD and TEM comparing the suspended particle load of water samples with fresh creek sediment showed that amorphous particles likely formed first, then aged to become more crystalline iron oxyhydroxides, such as akaganeite and goethite. During this aging process some of the initially smooth, 50-300 nm spherical particles may have formed nano-sized needles, which could potentially provide high reactive surface area for chemical and biological reactions. Surprisingly, total and dissolved metal concentrations in creek water and sediment revealed that elements such as Mn, Si, Ni, or Zn stayed mostly in solution. Only some metals such as Cu, Cr, and U seemed to be particle-associated in the water, likely co-precipitated with or adsorbed onto freshly-precipitating minerals. Pelagic and particle-associated organisms from water as well as fresh sediments were used for 16S rRNA gene cloning and sequencing and showed that members of the Proteobacteria (mainly Betaproteobacteria and

  7. On the uptake and binding of uranium (VI) by the green alga Chlorella Vulgaris

    International Nuclear Information System (INIS)

    Vogel, Manja


    the algae cells during the sorption experiment and a behavior analogue to initially heat killed cells. Differences in the contribution of functional groups to the uranium binding depending on the metabolic activity of the algal biomass were also shown by the difference spectra of the ATR-FTIR measurements calculated between uranium contaminated and untreated biomass. All together the spectroscopic investigations showed in case of Chlorella vulgaris a mixture of functional groups is responsible for the coordination of U(VI). The metabolic activity of the cells influences the binding of uranium under the given experimental conditions. Models of the structure of the formed U(VI)-algae complexes in dependence of the metabolic activity were created. For living algal cells, mainly carboxylic and organic phosphate groups are involved in the binding of uranium, whereas in dead algal biomass additionally inorganic phosphates are involved to some extend in the interaction of uranium with algal cells. The transferability of the obtained findings concerning the experiments in mineral medium to natural occurring mining related waters was verified exemplary with the surface water of ''Gessenwiese'' (former ''Gessenhalde'' at Ronneburg). The obtained results of this study contribute to the prediction of the migration behavior of uranium under environmental conditions, the radiological risk assessment of geogenic and anthropogenic appearing uranium and a reliable estimation of the accumulation of uranium in the food chain.