NDLI: Biosynthesis of gold nanoparticles by the living freshwater diatom Eolimna minima, a species developed in river biofilms.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Mornet, Stéphane Mesmer-Dudons, Nathalie Maury-Brachet, Régine Feurtet-Mazel, Agnès Baudrimont, Magalie Charron, Laëtitia
Description	Country affiliation: France Author Affiliation: Feurtet-Mazel A ( Univ. Bordeaux, EPOC, UMR 5805, 33120, Arcachon, France. agnes.feurtet-mazel@u-bordeaux.fr.); Mornet S ( CNRS, ICMCB, UPR 9048, 33600, Pessac, France.); Charron L ( Univ. Bordeaux, EPOC, UMR 5805, 33120, Arcachon, France.); Mesmer-Dudons N ( Univ. Bordeaux, EPOC, UMR 5805, 33120, Arcachon, France.); Maury-Brachet R ( Univ. Bordeaux, EPOC, UMR 5805, 33120, Arcachon, France.); Baudrimont M ( Univ. Bordeaux, EPOC, UMR 5805, 33120, Arcachon, France.)
Abstract	Testing biotransformation capacities of living aquatic microalgae diatoms to naturally synthetize gold nanoparticles (AuNP) from gold salts and assessing aftereffects on their viability by microscope observations is a great challenge. In this work, a laboratory experiment was conducted, which aimed to observe (i) directly by transmission electronic and light microscopy and (ii) through indirect measurements (UV-visible spectroscopy) the periphytic freshwater diatom Eolimna minima exposed to gold salts. This work revealed the capacity of E. minima to intracellularly biosynthetize AuNP and to tolerate it. AuNP synthesis appears as a mechanism of detoxification to protect diatom from gold salt contamination. We also pointed out the risks associated with the spread of diatoms full of AuNP, through the trophic web of freshwater ecosystems. The preponderant part of the diatoms in natural biofilms associated with their position at the basis of the trophic webs in rivers could then make them responsible for the contamination of their consumers (grazer animals) and consequently for the potential release of AuNP through the entire food web.
ISSN	09441344
Issue Number	5
Volume Number	23
e-ISSN	16147499
Journal	Environmental Science and Pollution Research
Language	English
Publisher	Springer
Publisher Date	2016-03-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biofilms Growth & Development Chlorides Metabolism Diatoms Gold Compounds Gold Metal Nanoparticles Rivers Microbiology Water Pollutants, Chemical Animals Biotransformation Drug Effects Ecosystem Environmental Monitoring Methods Food Chain Analysis Toxicity Models, Biological Nanotechnology Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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