Vortragsreihe Ökologie und Umweltforschung WS 2009/10

Donnerstag 16:15-17:45 H6, Geo

---

Prof. Alfred Hirner
Univ. Duisburg-Essen, Institut für Umweltanalytik und Angewandte Geochemie
Donnerstag, 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.

 

Weitere Informationen:

• Ankündigung als pdf

Export as iCal:

---

zurück zur Liste

Datum	Vortragender	Titel
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	Baumartenwahl im Klimawandel [Abstract]
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]
Montag H8 07.12.2009	Prof. Yaoming Ma (Vortrag fällt aus!) Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, CAS, Beijing	Vortrag fällt aus! [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]
H6 07.01.2010	Dr. Torsten Meiners Angewandte Zoologie/Ökologie der Tiere, FU Berlin	Chemical diversity in tritrophic interactions - when things get complex [Abstract]
H6 14.01.2010	PD Dr. Alfred Becker Potsdam-Institut für Klimafolgenforschung e. V.	Integrated eco-hydrological analysis in the Elbe river basin [Abstract]
Freitag H8 12:15 15.01.2010	Professor Dr. Yiqi Luo Department of Botany and Microbiology, University of Oklahoma	Ecosystem-climate interactions: Impacts, feedback, mechanisms and predictions [Abstract]
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	Produzieren Pflanzen tatsächlich Methan? [Abstract]
H6 11.02.2010	Dr. Lian Pin Koh ETH Zürich	Can carbon payment schemes stop the spread of industrial agriculture in South-East Asia? [Abstract]