The growth inhibition and decrease of photosynthetic oxygen production, induced by dodecylethyldimethyl-ammonium bromide on selected Microcystis aeruginosa strains from Doñana Park, were analyzed. A concentration-dependent growth response was obtained for all strains with the presence of this quaternary ammonium compound in culture medium, and there are significant differences in the sensitive grade exhibited by each one of them.
An immediate decrease of the O
Copyright: | © Aristotle University of Thessaloniki | |
Quelle: | 2nd International Conference 2009 (Juni 2009) | |
Seiten: | 7 | |
Preis inkl. MwSt.: | € 5,00 | |
Autor: | M.C. Bartolomé Ana D’ors de blas Victoria López-Rodas Eduardo Costas Rodriguez Sánchez-Fortún | |
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Arsenic contaminated environments: bioremediation perspective from molecular analysis on the bacterial arsenical metabolism
© Aristotle University of Thessaloniki (6/2009)
The metalloid arsenic (As) can be released from geological formations and it is widely used in anthropogenic activities (industry, agriculture, etc.) contaminating several aquatic and soil environments. The arsenate As(V) and arsenite As(III) can be subject to microbiologically oxidation, reduction and methylation reactions. Indeed, bacterial metabolisim of arsenical species in the environment is critical in the As cycle. In the present study, novel aerobic bacterial strains responsible for the oxidation and reduction of As were isolated in water samples supplemented with arsenite or arsenate.
Eigenschaften von Umweltchemikalien: Untersuchungsstrategien und Bewertungskriterien
© Bayerisches Landesamt für Umwelt (8/2009)
Vortrag + PowerPoint Presentation mit 25 Folien
Schadstoffbelastung von Elbauen und Testung der Sanierung durch Phytoremediation
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (8/2009)
Aus früheren und aktuellen Untersuchungen ist bekannt, dass die Auenböden der Elbe und vor allem des Nebenflusses Mulde, elementspezifisch zum Teil hochgradig mit Metallen kontaminiert sind [1], [2]. Das Ausmaß der Belastung an einem Standort wird insbesondere durch die Überflutungsbedingungen während der Hochwasserphasen gesteuert und hängt maßgeblich von der Qualität und Quantität der Schwebstoffe sowie Sedimente ab, die sich während der Hochwasserphasen in den Auen absetzten.
Protection against Mg2+, Cu2+ and Zn2+ toxicity through siderophore in Frankia strains nodulating Hippöphae salicifolia D. Don
© Aristotle University of Thessaloniki (6/2009)
To study the role of siderophore in protecting the frankial strains from metal toxicity, Frankia strains were grown in presence of Mg2+, Cu2+ and Zn2+. Growth was observed up to (500 uM) Mg2+, (10 uM) Cu2+ and (10 uM) Zn2+ and maximum at 200 uM Mg2+, 1 uM Cu2+ and 1 uM Zn2+.
Metal bound to sediments bioavailability and sediment toxicity assessment using Arenicola marina in a field survey
© Aristotle University of Thessaloniki (6/2009)
In this research work, toxicity and bioavailability of metals Zn, Ni, Pb, Cd, Cu, Co and Hg bound to sediments from two sites (Guad1 and Guad2) of Guadalete River Estuary (SW Spain) were evaluated. Sediment physico-chemical characterization was undertaken and mortality and metal accumulation were determined in the species Arenicola marina after a 14 days in situ exposure in benthic cages.