Literatura científica selecionada sobre o tema "Cycle de l’uranium"
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Artigos de revistas sobre o assunto "Cycle de l’uranium"
Le Gros, Gaïc. "Naarea, le pari des sels fondus". Revue Générale Nucléaire, n.º 5 (2022): 20–21. http://dx.doi.org/10.1051/rgn/20225020.
Texto completo da fonteSamson, E., I. Guseva Canu, A. Acker e D. Laurier. "Reconstitution des expositions professionnelles des travailleurs français du cycle de l’uranium". Revue d'Épidémiologie et de Santé Publique 60 (setembro de 2012): S49—S50. http://dx.doi.org/10.1016/j.respe.2012.06.020.
Texto completo da fonteSamson, E., O. Laurent, I. Piot, P. Laroche e D. Laurier. "Travailleurs du cycle de l’uranium en France : analyse de la mortalité". Archives des Maladies Professionnelles et de l'Environnement 76, n.º 4 (setembro de 2015): 401. http://dx.doi.org/10.1016/j.admp.2015.04.030.
Texto completo da fontePourcelot, L., B. Boulet e N. Cariou. "Utilisation des isotopes de l’uranium et du rapport U/Th pour évaluer le marquage des végétaux consécutif aux rejets d’uranium des installations du cycle du combustible". Radioprotection 50, n.º 3 (julho de 2015): 209–14. http://dx.doi.org/10.1051/radiopro/2015008.
Texto completo da fonteTeses / dissertações sobre o assunto "Cycle de l’uranium"
Lefebvre, Pierre. "Évolution à long terme de la spéciation et de la mobilité de l’uranium dans les sédiments et les sols : processus naturels d'enrichissement en uranium dans le bassin versant du Lac Nègre". Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS292.
Texto completo da fonteUnderstanding the geochemical behavior of uranium (U) in the environment is crucial for the limitation of U dissemination in contaminated systems. The primary objective of this thesis was to determine the potential evolution of noncrystalline U phases over thousand years in naturally U-rich lacustrine sediments (up to more than 1000 µg/g) from Lake Nègre, in the Mercantour-Argentera Massif (South-East France). Using U isotopic ratios (δ238U and (234U/238U)) and U L3-edge X-ray absorption spectroscopy (XAS), we show that U is first deposited as organic-bound mononuclear species and is readily reduced to U(IV). In less than 700 years, these species transform into U(IV)-silica polymers with a local structure close to that of coffinite (USiO4·nH2O). This transformation highlights the role of ligand abundance in limiting the precipitation of crystalline U phases, but only slightly reduces the lability of uranium which potential mobility remains significant even after several thousand years. At the watershed scale, U originates from fractures in the granitic bedrock and is subsequently scavenged in the soils, especially in the wetland upstream of the lake (up to > 5000 µg/g), before being transported through erosion. Uranium scavenging in the soils occurs through complexation by organic matter including particular biological structures, followed by partial reduction to U(IV). U is thus mainly present in mononuclear species but also in polymeric U(VI) phases which may potentially result from U aging after thousand years of accumulation
Augustine, Starrlight. "Metabolic programming of zebrafish, Danio rerio uncovered : Physiological performance as explained by Dynamic Energy Budget Theory and life-cycle consequences of uranium induced perturbations". Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4708/document.
Texto completo da fonteThe aim of this dissertation is to characterize the toxicity of depleted uranium (U) on the metabolism of zebrafish, Danio rerio. The underlying hypothesis of this work is that effects of U show up as effects on the metabolism of the individual. Consequently, we characterized physiological performance using Dynamic Energy Budget (DEB) theory since it is the only theory which simultaneously specifies ingestion, assimilation, growth, reproduction, maturation, maintenance and ageing over the whole life-cycle at varying food availability. Thus a DEB model was built which quantifies and predicts how the physiological performance of zebrafish relates to food level (and temperature). We showed that development accelerates after birth until metamorphosis after which acceleration ceases. Furthermore, somatic maintenance costs are very high.A module specifying toxico-kinetics of U in a feeding, growing and reproducing individual was incorporated into the DEB model. The model was then applied to toxicity data (from the literature or acquired during this thesis) in order to determine which processes are affected by U. Our results show that, from 0 nM onwards, U increases costs for growth and either increases somatic maintenance or decreases assimilation. We were unable to detect effects on maturation. A histological study showed that U alters histology of the gut wall and may perturb host-microbe homeostasis. By accounting for differences in initial conditions between individuals we were able to explain a number of seemingly contradictory results. The take home message is: observations on individuals should not be averaged for groups of individuals
Capítulos de livros sobre o assunto "Cycle de l’uranium"
EVANS, Cécile, Sophie GABRIEL, Christian POLAK e Philippe VALBUENA. "Les coûts du combustible nucléaire". In Économie de l’énergie nucléaire 1, 167–235. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9094.ch4.
Texto completo da fonteCANTARELLA, Jacques, Cécile EVANS, Pierre KUNSCH, Didier LÉONARD e Jean-Paul MINON. "La gestion des combustibles usés". In Économie de l’énergie nucléaire 2, 1–66. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9095.ch1.
Texto completo da fonte