Vortragsreihe Ökologie und Umweltforschung WS 2009/10

Thursday 16:15-17:45 H6, Geo

If you would like to get an e-mail reminder, please join our mailinglist

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.


More information:Export as iCal: Export iCal
zurück zur Liste
Upcoming ...

BayCEER Colloquium:
Th. 2020-01-16
Ecosystem functional types and biome concepts
Ecological-Botanical Garden:
Su. 2020-01-05
Auf ins Neue! Winterspaziergang im ÖBG
Su. 2020-01-05
Konzert: Musikalischer Jahresbeginn mit den Rockin`Dinos
Su. 2020-01-19
Kastilien, Navarra und das Baskenland: Orchideen im Land Don Quijotes
Geographisches Kolloquium:
Tu. 2019-12-17
The meat of the Anthropocene: Food, capital and the globalisation of industrialised animal killing
BayCEER Blog
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
EGU – interesting research and free coffee
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 943.9 hPa
Lufttemperatur: 2.9 °C
Niederschlag: 7.8 mm/24h
Sonnenschein: 6 h/d
Wind (Höhe 17m): 12.9 km/h
Wind (Max.): 29.9 km/h
Windrichtung: SW

This site makes use of cookies More information