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231223s2010 xx |||||o 00| ||eng c |
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7 |
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|a 10.1021/la100293s
|2 doi
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|a pubmed24n0652.xml
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|a (DE-627)NLM195481887
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|a (NLM)20196582
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Brayner, Roberta
|e verfasserin
|4 aut
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| 245 |
1 |
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|a ZnO nanoparticles
|b synthesis, characterization, and ecotoxicological studies
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| 264 |
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|c 2010
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 02.08.2010
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|a Date Revised 27.04.2010
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a The potential ecotoxicity of nanosized zinc oxide (ZnO), synthesized by the polyol process, was investigated using common Anabaena flos-aquae cyanobacteria and Euglena gracilis euglenoid microalgae. The photosynthetic activities of these microorganisms, after addition of ZnO nanoparticles, varied with the presence of protective agents such as tri-n-octylphosphine oxide (TOPO) and polyoxyethylene stearyl ether (Brij-76) used to control particle size and shape during the synthesis. In the case of Anabaena flos-aquae , the photosynthetic activity, after addition of ZnO, ZnO-TOPO, and ZnO-Brij-76, decreased progressively due to stress induced by the presence of the nanoparticles in the culture medium. After contact with ZnO-TOPO nanoparticles, this decrease was followed by cell death. On the other hand, after 10 days, a progressive increase of the photosynthetic activity was observed after contact with ZnO and ZnO-Brij-76 nanoparticles. In the case of Euglena gracilis , cell death was observed after contact with all nanoparticles. Transmission electron microscopy (TEM) analyses of ultrathin sections of microorganisms showed that polysaccharides produced by Anabaena flos-aquae avoid particle internalization after contact with ZnO and ZnO-Brij-76 nanoparticles. On the other hand, nanoparticle internalization was observed after contact with all nanoparticles in the presence of Euglena gracilis and also with ZnO-TOPO nanoparticles after contact with Anabaena flos-aquae
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4 |
|a Journal Article
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1 |
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|a Dahoumane, Si Amar
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yéprémian, Claude
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Djediat, Chakib
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Meyer, Michaël
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Couté, Alain
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fiévet, Fernand
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 26(2010), 9 vom: 04. Mai, Seite 6522-8
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
8 |
|g volume:26
|g year:2010
|g number:9
|g day:04
|g month:05
|g pages:6522-8
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| 856 |
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|u http://dx.doi.org/10.1021/la100293s
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