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| Registros recuperados: 32 | |
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| Colas, Florent; Crassous, Marie-pierre; Laurent, Sebastien; Litaker, Richard W.; Rinnert, Emmanuel; Le Gall, Erwan; Lunven, Michel; Delauney, Laurent; Compère, Chantal. |
| Over the past decade Surface Plasmon Resonance (SPR) techniques have been applied to the measurement of numerous analytes. In this article, an SPR biosensor system deployed from an oceanographic vessel was used to measure dissolved domoic acid (DA), a common and harmful phycotoxin produced by certain microalgae species belonging to the genus Pseudo-nitzschia. During the biosensor deployment, concentrations of Pseudo-nitzschia cells were very low over the study area and measured DA concentrations were below detection. However, the in situ operational detection limit of the system was established using calibrated seawater solutions spiked with DA. The system could detect the toxin at concentrations as low as 0.1 ng mL−1 and presented a linear dynamic range... |
| Tipo: Text |
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| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00324/43481/42921.pdf |
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| Delauney, Laurent; Boukerma, Kada; Bucas, Karenn; Coail, Jean-yves; Debeaumont, Mathieu; Forest, Bertrand; Garello, Celia; Guyader, Gerard; Le Bras, Yves; Peleau, Michel; Rinnert, Emmanuel. |
| Oceans environmental monitoring and seafloor exploitation need in situ sensors and optical devices (cameras, lights) in various locations and on various carriers in order to initiate and to calibrate environmental models or to operate underwater industrial process supervision. For more than 10 years Ifremer deploys in situ monitoring systems for various seawater parameters and in situ observation systems based on lights and HD Cameras. To be economically operational, these systems must be equipped with a biofouling protection dedicated to the sensors and optical devices used in situ. Indeed, biofouling, in less than 15 days [1] will modify the transducing interfaces of the sensors and causes unacceptable bias on the measurements provided by the in situ... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00349/45998/45667.pdf |
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| Baudet, Emeline; Gutierrez-arroyo, A.; Baillieul, Marion; Charrier, J.; Němec, P.; Bodiou, L.; Lemaitre, J.; Rinnert, Emmanuel; Michel, K.; Bureau, B.; Adam, J. L.; Nazabal, V.. |
| The detection of molecules dissolved in liquid medium can be envisaged by means of an optical integrated sensor operating in middle infrared range. The intended sensor is composed of a cladding and a guiding selenide sputtered layers transparent in middle infrared. Hence, Ge-Sb-Se thin films were selected in view of tailored refractive index contrast, successfully deposited by radio frequency magnetron sputtering and characterized. To maximize the evanescent field at a wavelength of 7.7 µm, a suitable selenide waveguide allowing measuring the optical transmitted power was designed by performing computer simulations based on the effective index method enabling single-mode propagation for a waveguide width between 8 and 12 µm. Selenide sputtered films were... |
| Tipo: Text |
Palavras-chave: Optical sensing and sensors; Mid-infrared; Integrated optics devices; Chalcogenide glasses; Thin films. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00389/50014/50603.pdf |
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| Tijunelyte, Inga; Betelu, Stephanie; Moreau, Jonathan; Ignatiadis, Ioannis; Berho, Catherine; Lidgi-guigui, Nathalie; Guenin, Erwann; David, Catalina; Vergnole, Sebastien; Rinnert, Emmanuel; Lamy De La Chapelle, Marc. |
| Here, we present a surface-enhanced Raman spectroscopy (SERS) nanosensor for environmental pollutants detection. This study was conducted on three polycyclic aromatic hydrocarbons (PAHs): benzo[a]pyrene (BaP), fluoranthene (FL), and naphthalene (NAP). SERS substrates were chemically functionalized using 4-dodecyl benzenediazonium-tetrafluoroborate and SERS analyses were conducted to detect the pollutants alone and in mixtures. Compounds were first measured in water-methanol (9:1 volume ratio) samples. Investigation on solutions containing concentrations ranging from 10−6 g L−1 to 10−3 g L−1 provided data to plot calibration curves and to determine the performance of the sensor. The calculated limit of detection (LOD) was 0.026 mg L−1 (10−7 mol L−1) for... |
| Tipo: Text |
Palavras-chave: Polynuclear aromatic hydrocarbon (PAH); Surface-enhanced Raman spectroscopy (SERS); Nanosensor; Diazonium salt; Surface functionalization; Detection. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00386/49772/50316.pdf |
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| Betelu, Stephanie; Tijunelyte, Inga; Boubekeur-lecaque, Leila; Ignatiadis, Ioannis; Ibrahim, Joyce; Gaboreau, Stephane; Berho, Catherine; Toury, Timothee; Guenin, Erwann; Lidgi-guigui, Nathalie; Felidj, Nordin; Rinnert, Emmanuel; Lamy De La Chapelle, Marc. |
| Gold nanostructures (GNS) were chemically functionalized using four different diazonium salts: benzene-diazonium-tetrafluoroborate (DS), 4-decylbenzene-diazonium-tetrafluoroborate (DS-C10H21), 4-carboxybenzene-diazonium-tetrafluoroborate (DS-COOH), and 4-(aminoethyl)-benzene-diazonium-tetrafluoroborate (DS-(CH2)(2)NH2). Effective chemical grafting on GNS was shown by surface-enhanced Raman spectroscopy (SERS); aromatic ring deformations in the range of 1570-1591 cm(-1) are of particular interest. The very strong band observed around 1075 cm(-1), related to CH in-plane bending for mono- and para-substituted benzenes (coupled with ring-N stretching mode), provided further irrefutable evidence of the grafting. SERS enhancement of these two bands ascertains... |
| Tipo: Text |
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| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00350/46139/46200.pdf |
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| Baudet, Emeline; Sergent, M.; Nemec, P.; Cardinaud, C.; Rinnert, Emmanuel; Michel, K.; Jouany, L.; Bureau, B.; Nazabal, V.. |
| The development of the optical bio-chemical sensing technology is an extremely important scientific and technological issue for diagnosis and monitoring of diseases, control of industrial processes, environmental detection of air and water pollutants. Owing to their distinctive features, chalcogenide amorphous thin films represent a keystone in the manufacture of middle infrared integrated optical devices for a sensitive detection of biological or environmental variations. Since the chalcogenide thin films characteristics, i. e. stoichiometric conformity, structure, roughness or optical properties can be affected by the growth process, the choice and control of the deposition method is crucial. An approach based on the experimental design is undoubtedly a... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00390/50119/50725.pdf |
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| Moreau, Jonathan; Rinnert, Emmanuel. |
| Monoaromatic hydrocarbons (MAHs) monitoring is of environmental interest since these chemical pollutants are omnipresent. While waiting for robust sensors able to detect hydrocarbons at very low levels, the present study shows how each compound from pure BTEX mixtures can be identified fast and quantified thanks to Raman spectrometry and data processing based on the SIMPLISMA algorithm. A preprocessing module has been created to remove background contributions and a postprocessing program has been added to achieve matching and calibration. A wide range of BTEX concentrations and relative proportions has been investigated in order to determine the limitations of the processing. Output results achieved an accuracy of up to 95%. This method could be extended... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00270/38149/36553.pdf |
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| Davies, Peter; Sohier, L.; Cognard, J. -y.; Bourmaud, A.; Choqueuse, Dominique; Rinnert, Emmanuel; Creac'Hcadec, R.. |
| While the geometry of aerospace assemblies is carefully controlled, for many industrial applications such as marine structures bond line thickness can vary significantly. In this study epoxy adhesive joints of different thicknesses between aluminium substrates have been characterized using physico-chemical analyses (differential scanning calorimetry, DSC; dynamic mechanical analysis, DMA; spectroscopy), nano-indentation and mechanical testing. Thermal analyses indicated no influence of thickness on structure. Nano-indentation revealed no evidence of an interphase at the metal/epoxy interface, nor any change in modulus for different thicknesses, though Raman spectroscopy suggested there may be slight variations in composition close to the substrates.... |
| Tipo: Text |
Palavras-chave: Arcan; Mechanical properties; Aluminium; Epoxy. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6638.pdf |
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| Frere, L.; Paul-pont, I.; Rinnert, Emmanuel; Petton, Sebastien; Jaffre, J; Bihannic, Isabelle; Soudant, P.; Lambert, C.; Huvet, Arnaud. |
| The concentration and spatial distribution of microplastics in the Bay of Brest (Brittany, France) was investigated in two surveys. Surface water and sediment were sampled at nine locations in areas characterized by contrasting anthropic pressures, riverine influences or water mixing. Microplastics were categorized by their polymer type and size class. Microplastic contamination in surface water and sediment was dominated by polyethylene fragments (PE, 53–67%) followed by polypropylene (PP, 16–30%) and polystyrene (PS, 16–17%) microparticles. The presence of buoyant microplastics (PE, PP and PS) in sediment suggests the existence of physical and/or biological processes leading to vertical transfer of lightweight microplastics in the bay. In sediment (upper... |
| Tipo: Text |
Palavras-chave: Microplastic; Coastal ecosystem; Surface water; Sediment; Raman spectroscopy; Hydrodynamic; Dispersal particle modelling. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00379/48994/51083.pdf |
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| Tijunelyte, Inga; Dupont, Nathalie; Milosevic, Irena; Barbey, Carole; Rinnert, Emmanuel; Lidgi-guigui, Nathalie; Guenin, Erwann; De La Chapelle, Marc Lamy. |
| Among various cavitand molecules, cyclodextrins are extensively studied due to their ability to form host-guest complexes with small hydrophobic molecules. Aiming to explore cyclodextrin implementation on the scopes related to the environmental pollution monitoring or remediation, extensive studies for understanding the cyclodextrin-based host-guest complex formation with selected targeted substances are conducted. In this context, two polycyclic aromatic hydrocarbons, naphthalene and fluoranthene as well as toluene as a member of volatile organic compounds, were studied regarding their ability to encapsulate into cyclodextrin cavities. Synthesised complexes were examined by thermogravimetric analysis combined with Raman spectroscopy. The obtained results... |
| Tipo: Text |
Palavras-chave: Raman spectroscopy; Thermogravimetric analysis; Cyclodextrin; Polyaromatic hydrocarbons; PAH; Host-guest complex. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00417/52845/53907.pdf |
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| Lahens, Lisa; Strady, Emilie; Kieu-le, Thuy-chung; Dris, Rachid; Boukerma, Kada; Rinnert, Emmanuel; Gasperi, Johnny; Tassin, Bruno. |
| Both macroplastic and microplastic contamination levels were assessed for the first time in a tropical river estuary system, i.e. the Saigon River, that traverses a developing South East Asian megacity, i.e. Ho Chi Minh City, Vietnam. The analysis of floating debris collected daily on the Nhieu Loc - Thi Nghe canal by the municipal waste management service shows that the plastic mass percentage represents 11-43%, and the land-based plastic debris entering the river was estimated from 0.96 to 19.91 g inhabitant-1 d-1, namely 350 to 7270 g inhabitant-1 yr-1. Microplastics were assessed in the Saigon River and in four urban canals by sampling bulk water for anthropogenic fiber analysis and 300 μm mesh size plankton net exposition for fragment analysis. Fibers... |
| Tipo: Text |
Palavras-chave: Microplastic; Macroplastic; Urban river; Contamination; Anthropogenic fibers. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00427/53815/55460.pdf |
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| Frere, Laura; Maignien, Lois; Chalopin, Morgane; Huvet, Arnaud; Rinnert, Emmanuel; Morrison, Hilary; Kerninon, Sandrine; Cassone, Anne-laure; Lambert, Christophe; Reveillaud, Julie; Paul-pont, Ika. |
| Microplastics (<5 mm) exhibit intrinsic features such as density, hydrophobic surface, or high surface/volume ratio, that are known to promote microbial colonization and biofilm formation in marine ecosystems. Yet, a relatively low number of studies have investigated the nature of microplastic associated bacterial communities in coastal ecosystems and the potential factors influencing their composition and structure. Here, we characterized microplastics collected in the Bay of Brest by manual sorting followed by Raman spectroscopy and studied their associated bacterial assemblages using 16S amplicon high-throughput sequencing. Our methodology allowed discriminating polymer type (polyethylene, polypropylene and polystyrene) within small size ranges... |
| Tipo: Text |
Palavras-chave: Bacteria; Microplastics; Coastal ecosystem; Metabarcoding; Vibrios. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00449/56082/57614.pdf |
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| Dehaut, Alexandre; Cassone, Anne-laure; Frere, Laura; Hermabessiere, Ludovic; Himber, Charlotte; Rinnert, Emmanuel; Riviere, Gilles; Lambert, Christophe; Soudant, Philippe; Huvet, Arnaud; Duflos, Guillaume; Paul-pont, Ika. |
| Pollution of the oceans by microplastics (<5 mm) represents a major environmental problem. To date, a limited number of studies have investigated the level of contamination of marine organisms collected in situ. For extraction and characterization of microplastics in biological samples, the crucial step is the identification of solvent(s) or chemical(s) that efficiently dissolve organic matter without degrading plastic polymers for their identification in a time and cost effective way. Most published papers, as well as OSPAR recommendations for the development of a common monitoring protocol for plastic particles in fish and shellfish at the European level, use protocols containing nitric acid to digest the biological tissues, despite reports of... |
| Tipo: Text |
Palavras-chave: Microplastics; Digestion; Method; Seafood products; Tissue; Plastic integrity. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00335/44582/44469.pdf |
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| Ruffine, Livio; Ondreas, Helene; Blanc-valleron, Marie-madeleine; Teichert, Barbara M. A.; Scalabrin, Carla; Rinnert, Emmanuel; Birot, Dominique; Croguennec, Claire; Ponzevera, Emmanuel; Pierre, Catherine; Donval, Jean-pierre; Alix, Anne-sophie; Germain, Yoan; Bignon, Laurent; Etoubleau, Joel; Caprais, Jean-claude; Knoery, Joel; Lesongeur, Francoise; Thomas, Bastien; Roubi, Angelique; Legoix, Ludovic Nicolas; Burnard, Pete; Chevalier, Nicolas; Lu, Hailong; Dupre, Stephanie; Fontanier, Christophe; Dissard, Delphine; Olgun, Nazli; Yang, Hailin; Strauss, Harald; Ozaksoy, Volkan; Perchoc, Jonathan; Podeur, Christian; Tarditi, Corinne; Ozbeki, Eyyup; Guyader, Vivien; Marty, Bernard; Madre, David G; Pitel-roudaut, Mathilde; Grall, Celine; Embriaco, Davide; Polonia, Mina; Gasperini, Lucas; Cagatay, M. Namik; Henry, Pierre; Geli, Louis. |
| MarsiteCruise was undertaken in October/November 2014 in the Sea of Marmara to gain detailed insight into the fate of fluids migrating within the sedimentary column and partially released into the water column. The overall objective of the project was to achieve a more global understanding of cold-seep dynamics in the context of a major active strike-slip fault. Five remotely operated vehicle (ROV) dives were performed at selected areas along the North Anatolian Fault and inherited faults. To efficiently detect, select and sample the gas seeps, we applied an original procedure. It combines sequentially (1) the acquisition of ship-borne multibeam acoustic data from the water column prior to each dive to detect gas emission sites and to design the tracks of... |
| Tipo: Text |
Palavras-chave: Acoustic survey; Authigenic carbonates; Biogeochemistry; Chemical analyses; Cold seeps; Dissolved major elements; Fluid seepage; Geology; In situ Raman analysis; Methane; ROV dives. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00433/54434/55783.pdf |
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| Salaun, Stephanie; Rinnert, Emmanuel; Compere, Chantal. |
| Cette étude s’inscrit dans le cadre du projet REI n°2010 34 0010 intitulé « Biofilms et corrosion d’alliages inoxydables en eau de mer », et a pour objectif de caractériser le biofilm responsable de l’activation de la corrosion des alliages inoxydables en eau de mer par une approche pluridisciplinaire, dans le but d’identifier les composantes responsables de ce type de corrosion. Ce biofilm spécifique est ainsi en cours de caractérisation par des méthodes de microscopie Apotome et de spectroscopie Raman. Ce poster a fait l'objet d'une présentation lors de l'Ecole thématique du CNRS : Voyage au centre d'un biofilm : physico-chimie des exopolymères de l'espace inter-cellulaire. Nancy, les 27 et 29 septembre 2011. |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00057/16775/14228.pdf |
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| Dribek, Mohamed; Rinnert, Emmanuel; Colas, Florent; Crassous, Marie-pierre; Compere, Chantal. |
| We demonstrate the possible use of organometallic nanoprobe on competitive surface-enhanced Raman scattering immunoassay for policyclic aromatic hydrocarbon detection in sea water. This type of SERS immunoassay is based on to capture Raman reporter-labeled immuno-Au onto the immobilized layer of antigens (benzo[a]pyrene) on the gold substrate after incubation of these nanoprobes with PAHs including in the sample. To realize nanoprobes, first we have prepared gold nanoparticles (GNPs) according to Frens’ method. Then, we have labeled GNPs by the Raman reporter of 5,5’-Dithiobis(succinimidyl-2-nitrobenzoate) (DSNB). Thereafter, Benzo[a]pyrene antibody was attached to the DSNB labeled GNPs. Before use in SERS detection, their activity was controlled by... |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00088/19912/17576.pdf |
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| Registros recuperados: 32 | |
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