Výsledky vyhledávání - "Romain Bridou"

In vitro simulation of oscillatory redox conditions in intertidal sediments: N, Mn, Fe, and P coupling

Autor: Gwenaël Abril, Emmanuel Tessier, David Amouroux, Romain Bridou, Sylvain Bouchet, Pierre Anschutz

Publikováno v: Continental Shelf Research
Continental Shelf Research, Elsevier, 2019, 177, pp.33-41. ⟨10.1016/j.csr.2019.03.007⟩
Continental Shelf Research, 2019, 177, pp.33-41. ⟨10.1016/j.csr.2019.03.007⟩

International audience; In coastal environments, oscillating redox conditions represent a functional state affecting organic matter mineralization. Such transient diagenetic processes remain difficult to study in situ, and we therefore designed a spe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b927d5914329da1e7d21ce8417535cf
https://hal.archives-ouvertes.fr/hal-02104948/document

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Methylation and dealkykation of tin compounds by sulfate- and nitrate-reducing bacteria

Autor: Romain Bridou, Pablo Rodríguez-González, Rémy Guyoneaud, David Amouroux, Teodor Stoichev, Mathilde Monperrus, Patricia Navarro, Emmanuel Tessier

Publikováno v: Chemosphere
Chemosphere, Elsevier, 2018, 208, pp.871-879. ⟨10.1016/j.chemosphere.2018.06.030⟩
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

In this study, axenic cultures of sulfate-reducing (SRB) and nitrate-reducing (NRB) bacteria were examined for their ability to methylate inorganic tin and to methylate or dealkylate butyltin compounds. Environmentally relevant concentrations of natu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f34725eb2334b1845ac6c06ce3412dda
https://hal.archives-ouvertes.fr/hal-01836369

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Site-Directed Mutagenesis of HgcA and HgcB Reveals Amino Acid Residues Important for Mercury Methylation

Autor: Dwayne A. Elias, Alexander Johs, Judy D. Wall, Romain Bridou, Steven D. Brown, Jerry M. Parks, Richard A. Hurt, Mircea Podar, Steven D. Smith

Publikováno v: Applied and Environmental Microbiology. 81:3205-3217

Methylmercury is a potent neurotoxin that is produced by anaerobic microorganisms from inorganic mercury by a recently discovered pathway. A two-gene cluster, consisting of hgcA and hgcB , encodes two of the proteins essential for this activity. hgcA

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24805a725f391c309a0f26a62b500ed3
https://doi.org/10.1128/aem.00217-15

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Investigations into the differential reactivity of endogenous and exogenous mercury species in coastal sediments

Autor: Romain Bridou, Pierre Anschutz, Rémy Guyoneaud, David Amouroux, Pablo Rodríguez-González, Mathilde Monperrus, Sylvain Bouchet, Emmanuel Tessier

Publikováno v: Environmental Science and Pollution Research
Environmental Science and Pollution Research, Springer Verlag, 2013, 20 (3), pp.1292--1301. ⟨10.1007/s11356-012-1068-9⟩

International audience; Stable isotopic tracer methodologies now allow the evaluation of the reactivity of the endogenous (ambient) and exogenous (added) Hg to further predict the potential effect of Hg inputs in ecosystems. The differential reactivi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09cda622469b8c688f5cb3167874e063
https://doi.org/10.1007/s11356-012-1068-9

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Overview of Mercury Methylation Capacities among Anaerobic Bacteria Including Representatives of the Sulphate-Reducers: Implications for Environmental Studies

Autor: Jean-Claude Salvado, Magali Ranchou-Peyruse, Romain Bridou, Robert Duran, Rémy Guyoneaud, David Amouroux, Mathilde Monperrus

Publikováno v: Geomicrobiology Journal
Geomicrobiology Journal, Taylor & Francis, 2009, 26 (1), pp.1-8. ⟨10.1080/01490450802599227⟩

International audience; Mercury methylation has been extensively reported in the literature among "Firmicutes" and "Proteobacteria." Nevertheless, results are hardly comparable because of differences in initial inorganic mercury concentrations used.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e46a5ec1152308f1dee70160b6d48597
https://doi.org/10.1080/01490450802599227

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Identical Hg isotope mass dependent fractionation signature during methylation by sulfate-reducing bacteria in sulfate and sulfate-free environment

Autor: Vincent Perrot, Zoyne Pedrero, David Amouroux, Mathilde Monperrus, Romain Bridou, Rémy Guyoneaud

Publikováno v: Environmental Science and Technology
Environmental Science and Technology, American Chemical Society, 2015, 49 (3), pp.1365-1373. ⟨10.1021/es5033376⟩

International audience; Inorganic mercury (iHg) methylation in aquatic environments is the first step leading to monomethylmercury (MMHg) bioaccumulation in food webs and might play a role in the Hg isotopic composition measured in sediments and orga

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e1069dc2b594a78d4f7d7ceaa73320e
https://pubmed.ncbi.nlm.nih.gov/25564955

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The genetic basis for bacterial mercury methylation

Autor: Richard A. Hurt, Romain Bridou, Mircea Podar, Alexander Johs, Anthony V. Palumbo, Yun Qian, Judy D. Wall, Liyuan Liang, Dwayne A. Elias, Stephen J. Tomanicek, Jerry M. Parks, Jeremy C. Smith, Steven D. Smith, Craig C. Brandt, Steven D. Brown

Publikováno v: Science (New York, N.Y.). 339(6125)

Mercury Methylating Microbes Mercury (Hg) most commonly becomes bioavailable and enters the food web as the organic form methylmercury, where it induces acute toxicity effects that can be magnified up the food chain. But most natural and anthropogeni

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ecf0b66ba10c487d0360ca32824fbcf
https://pubmed.ncbi.nlm.nih.gov/23493700

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Transformation, localization, and biomolecular binding of Hg species at subcellular level in methylating and nonmethylating sulfate-reducing bacteria

Autor: Zoyne Pedrero, Mathilde Monperrus, David Amouroux, Sandra Mounicou, Romain Bridou, Rémy Guyoneaud

Publikováno v: Environmental Science and Technology
Environmental Science and Technology, American Chemical Society, 2012, 46 (21), pp.11744-11751. ⟨10.1021/es302412q⟩

International audience; Microbial activity is recognized to play an important role on Hg methylation in aquatic ecosystems. However, the mechanism at the cellular level is still poorly understood. In this work subcellular partitioning and transformat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a753eb168c4cf388dcf93ace86324927
https://pubmed.ncbi.nlm.nih.gov/23050725

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Measurements of gaseous mercury exchanges at the sediment-water, water-atmosphere and sediment-atmosphere interfaces of a tidal environment (Arcachon Bay, France)

Autor: Gérard Thouzeau, Jacques Clavier, Romain Bridou, Emmanuel Tessier, Mathilde Monperrus, Sylvain Bouchet, David Amouroux

Publikováno v: Journal of Environmental Monitoring
Journal of Environmental Monitoring, Royal Society of Chemistry, 2011, 13 (5), pp.1351-1359. ⟨10.1039/C0EM00358A⟩

International audience; The elemental mercury evasion from non-impacted natural areas is of significant importance in the global Hg cycle due to their large spatial coverage. Intertidal areas represent a dynamic environment promoting the transformati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad3de41e198d3729c1722965b8948709
https://hal.univ-brest.fr/hal-00670370

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Simultaneous determination of mercury methylation and demethylation capacities of various sulfate-reducing bacteria using species-specific isotopic tracers

Autor: Pablo Rodriguez Gonzalez, David Amouroux, Mathilde Monperrus, Romain Bridou, Rémy Guyoneaud

Publikováno v: Environmental Toxicology and Chemistry
Environmental Toxicology and Chemistry, Wiley, 2011, 30 (2), pp.337-344. ⟨10.1002/etc.395⟩

The use of species-specific isotopic tracers for inorganic and methyl mercury has allowed the simultaneous determination of the methylation and demethylation potentials of pure culture of isolated sulfate-reducing (SR) bacterial strains using low Hg

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc3accbeebccd57957e521241a910e4d
https://hal.archives-ouvertes.fr/hal-01843570

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