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Academic literature on the topic 'Teneur en sélénium – Spéciation'
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Journal articles on the topic "Teneur en sélénium – Spéciation"
Heninger, I., M. Potin-Gautier, M. Astruc, L. Galvez, and V. Vignier. "Mise au point de techniques analytiques pour la spéciation du sélénium dans les boues de stations d'épuration d'eaux résiduaires urbaines." Revue des sciences de l'eau 11, no. 3 (April 12, 2005): 333–46. http://dx.doi.org/10.7202/705310ar.
Full textBellanger, Jacques, Jean-Claude Bouvier, and Claudine Lab. "Dosage du sélénium dans le vin par spectrofluorimétrie. Application à quelques vins francais." OENO One 26, no. 4 (December 31, 1992): 287. http://dx.doi.org/10.20870/oeno-one.1992.26.4.1186.
Full textSeby, F., M. Potin-Gautier, and A. Castetbon. "Étude électrochimique et spéciation du sélénium en eaux marines." Journal français d’hydrologie 24, no. 1 (1993): 81–90. http://dx.doi.org/10.1051/water/19932401081.
Full textPotin-Gautier, M., N. Gilon, and F. Seby. "Spéciation du sélénium en eaux thermo-minérales. Apport de différentes techniques analytiques." Journal européen d’hydrologie 27, no. 1 (1996): 27–44. http://dx.doi.org/10.1051/water/19962701027.
Full textBueno, M., J. Darrouzès, M. Dauthieu, S. Simon, N. Gilon, F. Pannier, and M. Potin-Gautier. "Stratégies analytiques pour la spéciation du sélénium inorganique et organique dans les eaux naturelles." European journal of water quality 36, no. 2 (2005): 179–90. http://dx.doi.org/10.1051/water/20053602179.
Full textTiglyene, Souad, Abderrahim Jaouad, and Laila Mandi. "Mobilité et spéciation du chrome dans un système à phragmites australis de traitement des eaux usées de tanneries." Revue des sciences de l'eau 21, no. 1 (April 29, 2008): 1–16. http://dx.doi.org/10.7202/017927ar.
Full textSeboussi, Rabiha, Bernard Faye, and Ghaleb Alhadrami. "Facteurs de variation de quelques éléments trace (sélénium, cuivre, zinc) et d’enzymes témoins de la souffrance musculaire dans le sérum du dromadaire (Camelus dromedarius) aux Emirats arabes unis." Revue d’élevage et de médecine vétérinaire des pays tropicaux 57, no. 1-2 (January 1, 2004): 87. http://dx.doi.org/10.19182/remvt.9911.
Full textFaye, Bernard, M. Kamil, and M. Labonne. "Teneur en oligo-éléments dans les fourrages et le plasma des ruminants domestiques en République de Djibouti." Revue d’élevage et de médecine vétérinaire des pays tropicaux 43, no. 3 (March 1, 1990): 365–73. http://dx.doi.org/10.19182/remvt.8816.
Full textArvy, M. P. "Relations entre la teneur en sélénium et celle de seize éléments dansHelminthia echioides etTrifolium repens se developpant sur sols argileux." Plant and Soil 84, no. 3 (October 1985): 437–43. http://dx.doi.org/10.1007/bf02275482.
Full textCOMBES, S. "Valeur nutritionnelle de la viande de lapin." INRAE Productions Animales 17, no. 5 (October 5, 2004): 373–83. http://dx.doi.org/10.20870/productions-animales.2004.17.5.3610.
Full textDissertations / Theses on the topic "Teneur en sélénium – Spéciation"
Lobos, Salvo Maria Soledad. "Développement de méthodologies analytiques pour la détermination et spéciation du sélénium dans des sols chiliens." Pau, 1999. http://www.theses.fr/1999PAUU3009.
Full textFournier, Elodie. "Bioaccumulation du sélénium et effets biologiques induits chez le bivalve filtreur Corbicula fluminea : prise en compte de l'activité ventilatoire, de la spéciation du sélénium et de la voie de contamination." Bordeaux 1, 2005. http://www.theses.fr/2005BOR13029.
Full textSelenium is an essential micronutrient for most of living organisms. However, toxic effects in several ecosystems have been reported in the literature. Toxicity comprehension is difficult due to the complexity of Se oxidation states in the environment. The aim of this thesis work was to acquire knowledge on the physiological and environmental factors involved in bioaccumulation and toxicity processes in the freshwater filter-feeding bivalve C. Fluminea. The aims were : i) to define what the factors involved in Se bioaccumulation processes in the bivalve are, ii) to characterize Se bioaccumulation at different biological organisation levels, iii) to investigate Se toxic effects. First experiments, carried out for short term exposure duration (3 days), have permitted to underline the importance of Se chemical speciation in bioaccumulation processes in C. Fluminea. It has been shown that the organic form, selenomethionine, was much more bioavailable than the inorganic forms, selenite and selenate. Moreover, the route of transfer was determinant in thoses processes. Inorganic forms have been better extracted by trophic route, whereas selenomethionine has been better extracted by the direct route. In our experimental conditions, ventilation of the bivalve has not been a limitant factor for Se bioaccumulation by the direct route, whereas it has been for bioaccumulation by the trophic route. Ventilation has been largely modified by the presence of dissolved selenite and selenomethionine. We have shown that the kinetics of selenomethionine bioaccumulation are much more fast than those of selenite. Moreover, when introduced as SeMet, internalised Se appeared to be relatively remanent in soft tissues of C. Fluminea in comparison with Se internalised when introduced as selenite. Subcellular and molecular distributions of these forms were very different. Finally, it has been shown that selenomethionine and selenite could generate weak alterations of the anti-oxidant status and the genetic expression in C. Fluminea. On the other hand, important ultrastructural modifications of gill tissues have been observed after selenite and selenomethionine exposure
Romero, Rama Andréa. "Biogéochimie du sélénium dans différents milieux aquatiques (Lacs et estuaires)." Electronic Thesis or Diss., Pau, 2020. http://www.theses.fr/2020PAUU3049.
Full textSelenium (Se) exists in aquatic systems in multiple oxidation states (VI, IV, 0, -II) in a wide variety of species. Selenate and selenite are generally found in natural waters but may not account for total Se content indicating the co-existence of unidentified reduced Se compounds. Due to the role of Se as a micro-nutrient for living organisms, the characterization of Se compounds must be done to better constrain Se biotic and abiotic transformations and fate in aquatic systems. Selenium occurring in trace amounts in most aquatic environments, sensitive analytical methods are required to achieve this goal. In addition, the number of studies reporting on selenium speciation and cycling in non-polluted aquatic environments is still limited claiming for more field investigations. In this work, the optimization of chromatographic separation based on mixed-mode stationary phase combining reverse phase and anionic exchange allowed the simultaneous separation of six inorganic and organic compounds. The developed method together with a sensitive method for the determination of volatile Se compounds, were applied in parallel for the first time to provide new insights on the Se cycle in different aquatic systems as function of biogeochemical and seasonal variations. In a stratified eutrophic lake (Lake Kinneret, Israel), the existence of reduced and most probably organic Se containing compound actively produced by phytoplankton was revealed and suggested as a precursor for Se volatilization. Meanwhile under anaerobic conditions, the reduction of oxidized Se species to reduced forms could result in Se removal to sediments. In oligotrophic alpine lakes (Pyrenees lakes, France - Spain), selenate was the major compound in water and represented 63% of total Se. Downstream in the Adour estuary, the influence of agricultural land use on Se inputs was demonstrated with a clear relationship between Se and nitrates water concentrations, while selenium uptake and transformation to reduced and volatile compounds was promoted seaward during warmer productive periods
Darrouzes, Jérôme. "Amélioration des étapes analytiques pour la spéciation du sélénium au niveau ultratrace : Apport d'un spectromètre de masse à couplage inductif équipé d'une cellule de collision/réaction (ICP-CC/R-MS)." Pau, 2005. http://www.theses.fr/2005PAUU3029.
Full textDue to the important properties of selenium, numerous works have been undertaken to realize the speciation analysis of this element. The coupling of an HPLC with a mass spectrometer is commonly used. This report presents the improvements realized on the existing methods to simultaneously analyse inorganic and organic species at the ultratrace level. We have used the last generation of quadrupole ICPMS equipped with collision/reaction cell to remove argon based polyatomic intereferences on major selenium isotopes. The optimization of this device as well as improvement of analytical steps before detection have been carefully realised. The developed techniques have been validated and applied to different water and biological samples at the ng(Se). L-1 level
Benabderraziq, Hind. "Modalités et processus de la contamination des eaux souterraines : application à la présence du sélénium dans la nappe de la craie (Nord de la France)." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10018/document.
Full textIn north France, the concentration of selenium in the groundwater of the Turonian-Senonian chalk layers located in the south of Lille (Emmerin, Houplin -Ancoisne , the Ansereuilles and Salome) exceeds drinking-water limit of 10 µg/L and reaches 60 μg/L in some located small areas. The various lithological levels, except the Senonian chalk, contain natural selenium. The maximum measured values stand out in the Ypresian clay layer (4.87 mg/kg), alluvial clays (4.8 mg/kg) and sediments of rivers with important influence of anthropogenic origin (between 2.1 to 15.8 mg/kg). Selenium has a high affinity to the organic material. The soluble/exchangeable fraction is the most mobile selenium one. Strontium isotopes coupled with Ca/Sr and Mg/Sr and strontium isotopes ratios 87Sr/86Sr were used to identify the main groundwater bodies and theirs mixtures. Oxidizing or reducing environment conditions are controlled by the variations in the groundwater level which is influenced by the inter-annual and seasonal changes in the water and pumping process. However, each well field is characterized by its geological and hydro–geochemical conditions. The selenium may be mobilized through seepage (from the top), water levels variations (from the bottom), lateral transfers (interconnections between boreholes due to hydraulic gradients) and mixtures of water from surrounding areas
Doit, Laurence. "Supplémentation en sélénium : intérêt de la spéciation." Bordeaux 2, 1997. http://www.theses.fr/1997BOR2P040.
Full textSeby, Fabienne. "Optimisation de méthodes analytiques pour la spéciation du sélénium inorganique dans les eaux et les sols." Pau, 1994. http://www.theses.fr/1994PAUU3018.
Full textGilon, Nicole. "Développement de techniques analytiques pour la spéciation du sélénium dans des échantillons biologiques." Pau, 1996. http://www.theses.fr/1996PAUU3031.
Full textCasiot, Corinne. "Développement de techniques analytiques couplées (HPLC-ICP-MS et EC-ICP-MS) pour la spéciation de métalloi͏̈des (arsenic, sélénium, antimoine et tellure)." Pau, 1999. http://www.theses.fr/1999PAUU3026.
Full textGuérin, Thierry. "Spéciation multiélémentaire de l'arsenic, sélénium, antimoine et tellure dans des eaux et des lixiviats de sols par couplage HPLC-ICP-MS." Pau, 1998. http://www.theses.fr/1998PAUU3003.
Full textBooks on the topic "Teneur en sélénium – Spéciation"
Wadgaonkar, Shrutika Laxmikant. Novel Bioremediation Processes for Treatment of Seleniferous Soils and Sediment. Taylor & Francis Group, 2018.
Find full textWadgaonkar, Shrutika Laxmikant. Novel Bioremediation Processes for Treatment of Seleniferous Soils and Sediment. Taylor & Francis Group, 2018.
Find full textWadgaonkar, Shrutika Laxmikant. Novel Bioremediation Processes for Treatment of Seleniferous Soils and Sediment. Taylor & Francis Group, 2018.
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