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Registros recuperados: 11
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A surface plasmon resonance system for the underwater detection of domoic acid ArchiMer
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...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00324/43481/42921.pdf
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Advances in measuring ocean salinity with an optical sensor ArchiMer
Le Menn, Marc; De La Tocnaye, J. L. De Bougrenet; Grosso, P.; Delauney, Laurent; Podeur, Christian; Brault, P.; Guillerme, O..
Absolute salinity measurement of seawater has become a key issue in thermodynamic models of the oceans. One of the most direct ways is to measure the seawater refractive index which is related to density and can therefore be related to the absolute salinity. Recent advances in high resolution position sensitive devices enable us to take advantage of small beam deviation measurements using refractometers. This paper assesses the advantages of such technology with respect to the current state-of-the-art technology. In particular, we present the resolution dependence on refractive index variations and derive the limits of such a solution for designing seawater sensors well suited for coastal and deep-sea applications. Particular attention has been paid to...
Tipo: Text Palavras-chave: Refractive index; Seawater; Density; Salinity; Refractometer.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00052/16295/13899.pdf
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Biofouling protection by electro-chlorination on optical windows for oceanographic sensors and imaging devices ArchiMer
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...
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00349/45998/45667.pdf
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Biofouling protection for marine environmental sensors ArchiMer
Delauney, Laurent; Compere, Chantal; Lehaitre, Michel.
These days, many marine autonomous environment monitoring networks are set up in the world. These systems take advantage of existing superstructures such as offshore platforms, lightships, piers, breakwaters or are placed on specially designed buoys or underwater oceanographic structures. These systems commonly use various sensors to measure parameters such as dissolved oxygen, turbidity, conductivity, pH or fluorescence. Emphasis has to be put on the long term quality of measurements, yet sensors may face very short-term biofouling effects. Biofouling can disrupt the quality of the measurements, sometimes in less than a week. Many techniques to prevent biofouling on instrumentation are listed and studied by researchers and manufacturers. Very few of them...
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00008/11920/8626.pdf
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Biofouling protection for marine underwater observatories sensors ArchiMer
Delauney, Laurent; Compere, Chantal; Lehaitre, Michel.
These days, many marine autonomous environment monitoring networks are set up in the world. Such systems take advantage of existing superstructures such as offshore platforms, lightships, piers, breakwaters or are placed on specially designed buoys or deep sea fix stations. The major goal for these equipments is to provide in real time reliable measurements without costly frequent maintenance. These autonomous monitoring systems are affected by a well known phenomena in seawater condition which is biofouling. Consequently, such system without efficient biofouling protection is hopeless. This protection must be applied to the sensors and to the underwater acoustic communication equipments.
Tipo: Text
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00107/21801/20176.pdf
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Deployment of new observing systems within the JERICO-RI ArchiMer
Puillat, Ingrid; Carlier, Antoine; Facq, Jean-valery; Rubio, Anna; Lazure, Pascal; Delauney, Laurent; Petihakis, George; Karlson, Bengt; Artigas, Felipe; Farcy, Patrick.
A key message of the JERICO-RI consortium (2014): “The complexity of the coastal ocean cannot be well understood if interconnection between physics, biogeochemistry and biology is not guaranteed. Such integration requires new technological developments allowing continuous monitoring of a larger set of parameters”. In agreement with this consideration, several new observing systems are developed, tested and deployed in the framework of the JERICO-NEXT H2020 project, amongst which a few of them will be presented as well as some preliminary results after the first deployments. Focus will be given on coastal transports and hydrology and on benthic biodiversity. In the first case, we will present a low cost 2D moored system dedicated to acquire vertical...
Tipo: Text Palavras-chave: JERICO; JERICO-NEXT; Coastal; Ocean Observing System (OOS); Harmonization.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00437/54866/56359.pdf
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Harmonization in the Joint European Research Infrastructure Network for Coastal Observatories -JERICO ArchiMer
Petihakis, George; Petersen, Wilhelm; Nair, Rajesh; Faimali, Marco; Pavanello, Giovanni; Boukerma, Kada; Delauney, Laurent; Puillat, Ingrid; Farcy, Patrick; Greenwood, Naomi.
The JERICO European research infrastructure (RI) is integrating diverse platform types such as fixed buoys, piles, moorings, drifters, FerryBoxes, gliders, HF radars, coastal cable observatories and the associated technologies dedicated to observe and monitor coastal European seas. The first steps of setting up, coordination and harmonization were done during 2011 to 2015 in the framework of FP7-JERICO (www.jerico-fp7.eu), a 4-year long infrastructure project co-funded by the European Commission with 27 partners from 17 European countries under the coordination of IFREMER. Next steps are driven in the H2020-JERICO-NEXT European project until 2019, involving 33 partners. The main objective of the JERICO consortium is to establish a Pan European approach for...
Tipo: Text Palavras-chave: Coastal observatories; Harmonization; Biofouling; Calibration; JERICO.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00295/40665/49966.pdf
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Novel, multi-platform acoustic and optical sensors and data services developed in the NeXOS project L. Golmen, E. Delory, O. Zielinski, J. del Rio ArchiMer
Golmen, L; Delory, E; Zielinski, O; Del Rio, J; Kvalsund, K; Pearlman, J; De Swart, L; Delauney, Laurent; Rieke, M; Osterhus, S.
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Ano: 2018 URL: http://archimer.ifremer.fr/doc/00450/56151/57693.pdf
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Spectrophotometric method for the determination of the pHT of sea water ArchiMer
Lamandé, Nolwenn; Salvetat, Florence; Le Bihan, Caroline; Delauney, Laurent.
Cet article présente la méthode spectrophotométrique mise en place au laboratoire de métrologie de l’fremer, afin de déterminer le pHT de l’eau de mer grâce à l’indicateur coloré pourpre de m-cresol. Le but est de décrire précisément cette méthode (matériel et mode-opératoire), ses difficultés, ainsi que les paramètres ayant un impact sur le pHT. Les résultats d’une comparaison inter-laboratoires menée par le JAMSTEC (Japan Agency for Marine-Earth Science and Technology) seront présentés, suivis d’une réflexion portant sur cette méthode ainsi que les exigences océanographiques mises en jeu.
Tipo: Text
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00479/59093/61731.pdf
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TEMPO: a new ecological module for studying deep-sea community dynamics at hydrothermal vents ArchiMer
Sarrazin, Jozee; Blandin, Jerome; Delauney, Laurent; Dentrecolas, Stephane; Dorval, Philippe; Dupont, Jacky; Legrand, Julien; Leroux, D.; Leon, Pierre; Leveque, Jean-jacques; Rodier, Philippe; Vuillemin, Renaud; Sarradin, Pierre-marie.
The major goal of this project, elaborated in the frame of the STREP Exocet/D European project, was to design a first autonomous long-term imaging module equipped with a deep-sea video camera, adequate lightning and sufficient energy storage while taking advantage of most recent progress in imaging and photonics. The new ecological module TEMPO was tested and deployed during the Momareto cruise held from August 6 to September 6, 2006 on the new French oceanographic vessel Pourquoi pas?, with the ROV Victor 6000. The scientific objectives of the Momareto cruise were to study the spatial and temporal dynamics of hydrothermal communities colonizing the MoMAR zone, located on the Azores Triple Junction.
Tipo: Text Palavras-chave: Community dynamics; Deep-sea; Imagery; Monitoring.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3597.pdf
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Toward a European Coastal Observing Network to Provide Better Answers to Science and to Societal Challenges; The JERICO Research Infrastructure ArchiMer
Farcy, Patrick; Durand, Dominique; Charria, Guillaume; Painting, Suzanne J.; Tamminem, Timo; Collingridge, Kate; Grémare, Antoine J.; Delauney, Laurent; Puillat, Ingrid.
The coastal area is the most productive and dynamic environment of the world ocean, offering significant resources and services for mankind. As exemplified by the UN Sustainable Development Goals, it has a tremendous potential for innovation and growth in blue economy sectors. Due to the inherent complexity of the natural system, the answers to many scientific and societal questions are unknown, and the impacts of the cumulative stresses imposed by anthropogenic pressures (such as pollution) and climate change are difficult to assess and forecast. A major challenge for the scientific community making observations of the coastal marine environment is to integrate observations of Essential Ocean Variables for physical, biogeochemical, and biological...
Tipo: Text Palavras-chave: European Research Infrastructure; JERICO and JERICO-NEXT; Coastal essential ocean variables; Coastal observatories; High frequency; Physics; Biogeochemistry and biology.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00514/62595/66955.pdf
Registros recuperados: 11
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