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dc.contributor.authorRichard, C.
dc.contributor.authorMitbavkar, S.
dc.contributor.authorLandoulsi, J.
dc.date.accessioned2018-06-06
dc.date.accessioned2018-10-23T09:24:59Z
dc.date.available2017-05-25
dc.date.available2018-10-23T09:24:59Z
dc.date.issued2017
dc.identifier.citationScanning, vol.2017; 2017; Article ID 5052646
dc.identifier.issn1932-8745
dc.identifier.urihttps://doi.org/10.1155/2017/5052646
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/7852
dc.description.abstractThis paper reports the development of biofilms on stainless steels (SS) upon exposure in a natural freshwater ecosystem for about six months and focuses on the composition of diatom populations. By using environmental scanning electron microscopy (ESEM) technique, we provide a detailed description regarding diatom identification at species level as well as their main characteristics, including type, morphology, ability to form colony, and motility. Results reveal the presence of both prostrate (initial colonizers) and stalked (late colonizers) forms. Pennate diatoms, Cocconeis placentula and Amphora coffeaeformis, and a centric diatom, Melosira varians , are shown to be the abundant forms regardless of the SS type. Pennate diatoms dominate the community and are directly attached to the substratum, whereas the centric form is entangled in the biofilm matrix in a significant number. The dominance of adnate forms suggests that these cells are sturdy and successfully maintaining their population. In situ monitoring of the electrochemical response of immersed materials showed ennoblement of the open circuit potential, which seems to be due to the biogenic production of H 2 O 2 , detected in a significant amount within the biofilms. The substantial enrichment of biofilms with diatoms potentially suggests the implication of these microorganisms in the process of ennoblement. A mechanism is proposed in this paper describing the possible interactions of diatom community with SS in the studied ecosystem.
dc.language.isoen
dc.publisherHindawi
dc.relation.ispartofScanning
dc.relation.isreferencedbySCI
dc.titleDiagnosis of the diatom community upon biofilm development on stainless steels in natural freshwater
dc.typeJournal Article
dc.affiliation.authorLaboratoire de M�canique et Rh�ologie (LMR), EA 2640, Polytech�Tours, Universit� Fran�ois Rabelais de Tours, 37200 Tours, France


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