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Lecture series in Ecology and Environmental Research WS 2009/10

Thursday 16:15-17:45 H6, Geo


Prof. Alfred Hirner
Univ. Duisburg-Essen, Institut für Umweltanalytik und Angewandte Geochemie
Thursday, 05.11.2009 16:15-17:45 H6:

Alkylated metal(loid) species in environmental chemistry and medicine

Eingeladen durch Britta Planer-Friedrich.

Alkylated metal(loid) species occur in the environment preferentially within reducing and acid habitats; while methylated compounds are naturally formed by biomethylation, higher alkylated ones are of industrial origin (e.g. biocides). They can be found in fully and partly alkylated forms, thus resembling volatile (in air) and water soluble species, resp. Up to now more than hundred species have been described in highly variable concentrations (mass fractions from 10-12 to 10-5). These concentrations significantly overlap with those for which biological effects are observed, so certain environmental scenarios (“hot spots”) demand toxicological evaluation (e.g. MMM in fish, TMA in natural gas or alkylated As, Sb, and Sn in composting). Besides investigating the toxicity of alkylated metal(loid) species in respect to human health, additionally it will be interesting to know, if methylation can also happen in the course of human metabolism. While this is fairly good known for methylation of arsenic in the liver, it seems not to be the case for mercury (where mainly demethylation is reported). Our group was successful to prove some methylation for bismuth, but for this element another interesting pathway could be pointed out: Methylated forms can be formed in the colon via biomethylation, and subsequently are found in blood and exhaled air.

 



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DatelecturerTitle
H6
29.10.2009
Dr. Thanh Nguyen
University of Bayreuth, Department of Plant Ecology
Agricultural Policy Analysis: The cases of Vietnam and South Korea [Abstract]
H6
05.11.2009
Prof. Alfred Hirner
Univ. Duisburg-Essen, Institut für Umweltanalytik und Angewandte Geochemie
Alkylated metal(loid) species in environmental chemistry and medicine [Abstract]
H6
12.11.2009
Dr. Christian Kölling
Bayerische Landesanstalt für Wald und Forstwirtschaft, Abt. Waldökologie - Standort und Bodenschutz
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H6
19.11.2009
Dr. Henrik von Wehrden
Uni Halle- Wittenberg
Conservation of a vast arid ecosystem - Habitat mapping and modelling in southern Mongolia [Abstract]
H6
03.12.2009
Prof. Dr. Bernd Mahr
TU Berlin, Institut für Telekommunikationssysteme
Modell und Modellgebrauch - Die Logik der Modelle [Abstract]
Monday
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Prof. Yaoming Ma (Vortrag fällt aus!)
Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, CAS, Beijing
Talk canceled! [Abstract]
H6
10.12.2009
Dr. Guido Wiesenberg
University of Bayreuth, Department for Agroecosystem Research
Lipids in plants and soils: New insights and challenges regarding formation, incorporation and turnover [Abstract]
H6
17.12.2009
Prof. Dr. Thomas Nauß
Universität Bayreuth, Abteilung Klimatologie
Research at the new climatology group at UBT - an introduction [Abstract]
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07.01.2010
Dr. Torsten Meiners
Angewandte Zoologie/Ökologie der Tiere, FU Berlin
Chemical diversity in tritrophic interactions - when things get complex [Abstract]
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14.01.2010
PD Dr. Alfred Becker
Potsdam-Institut für Klimafolgenforschung e. V.
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Friday
H8
12:15
15.01.2010
Professor Dr. Yiqi Luo
Department of Botany and Microbiology, University of Oklahoma
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H6
21.01.2010
Prof. Dr. Matthias Rillig
FU Berlin, Institut für Biologie, Arbeitsgruppe Ökologie der Pflanzen
Bodenstruktur und arbuskuläre Mykorrhizapilze [Abstract]
H6
28.01.2010
Dr. Frank Schurr
Universität Potsdam, AG Vegetationsökologie und Naturschutz
From moving seeds to shifting ranges: A demographic approach to plant biogeography [Abstract]
H6
04.02.2010
Dr. Frank Keppler
Max-Planck-Institut für Chemie in Mainz, Abt. Atmosphärenchemie
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11.02.2010
Dr. Lian Pin Koh
ETH Zürich
Can carbon payment schemes stop the spread of industrial agriculture in South-East Asia? [Abstract]
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