Academic literature on the topic 'Composition isotopique du carbone'
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Journal articles on the topic "Composition isotopique du carbone":
Hillaire-Marcel, Claude. "Les isotopes du carbone et de l’oxygène dans les mers post-glaciaires du Québec." Les mers post-glaciaires : paléogéographie, paléoécologie et chronologie 31, no. 1-2 (December 9, 2010): 81–106. http://dx.doi.org/10.7202/1000056ar.
Farid, Intissar, Kamel Zouari, and Abderrahmen Kallali. "Origine de la salinité des eaux du bassin Chougafiya (Tunisie)." Revue des sciences de l’eau 25, no. 3 (November 28, 2012): 255–74. http://dx.doi.org/10.7202/1013106ar.
Daux, V. "Reconstruction du climat à partir de la composition isotopique de l'oxygène et du carbone des cernes d'arbres." La Météorologie 8, no. 80 (2013): 14. http://dx.doi.org/10.4267/2042/48791.
Sène, Matar, Maurice Ndeye, and Alpha Oumar Diallo. "Le carbone 14 (14C) un traceur idéal pour la surveillance de la pollution atmosphérique en dioxyde de carbone (CO2) anthropogénique dans la zone de dakar." Journal de Physique de la SOAPHYS 2, no. 2 (May 12, 2021): C20A18–1—C20A18–8. http://dx.doi.org/10.46411/jpsoaphys.2020.02.18.
Razakamanarivo, Ramarson Herintsitohaina, Marie-Antoinette Razafindrakoto, and Alain Albrecht. "Fonction puits de carbone des taillis d'eucalyptus à Madagascar." BOIS & FORETS DES TROPIQUES 305, no. 305 (September 1, 2010): 5. http://dx.doi.org/10.19182/bft2010.305.a20438.
Gartzos, E. "COMPARATIVE STABLE ISOTOPES STUDY OF THE MAGNESITE DEPOSITS OF GREECE." Bulletin of the Geological Society of Greece 36, no. 1 (January 1, 2004): 196. http://dx.doi.org/10.12681/bgsg.16619.
Jørgensen, Uffe G. "Grains of Meteorites, Originating in Cool Carbon Stars." International Astronomical Union Colloquium 106 (1989): 374–77. http://dx.doi.org/10.1017/s0252921100063326.
Mathurin, Jean-Charles, Mathieu Ferry, Emmanuel Bourgogne, Yann Barrault, and Jacques de Ceaurriz. "Différenciation de l'origine exogène ou endogène de produits dopants par l'analyse isotopique du carbone." Revue Française des Laboratoires 2001, no. 331 (March 2001): 37–43. http://dx.doi.org/10.1016/s0338-9898(01)80052-4.
Millet, A., T. Bariac, C. Grimaldi, and J. Boulègue. "Signature isotopique et chimique des précipitations (pluies et pluviolessivats) en Guyane française." Revue des sciences de l'eau 12, no. 4 (April 12, 2005): 729–51. http://dx.doi.org/10.7202/705375ar.
Créach, Véronique, Georges Bertru, and André Mariotti. "Compositions isotopiques naturelles des bactéries hétérotrophes et détermination de l'origine du carbone organique dissous biodisponible." Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie 320, no. 4 (April 1997): 339–47. http://dx.doi.org/10.1016/s0764-4469(97)82776-x.
Dissertations / Theses on the topic "Composition isotopique du carbone":
BENTALEB, ILHEM. "Les processus physiologiques dans la couche euphotique et la composition isotopique du carbone organique du phytoplancton : relation entre la composition isotopique du carbone organique et le gaz carbonique dissous. applications a la paleoclimatologie." Paris 6, 1994. http://www.theses.fr/1994PA066045.
Tarits, Corinne. "Etude des variations de composition isotopique du carbone et de l'oxygène dans le domaine de la précipitation spontanée homogène du carbonate de calcium : modélisation du comportement isotopique du carbone dans ce domaine." Paris 5, 1990. http://www.theses.fr/1990PA05P617.
Kanpanon, Nicha. "La composition isotopique en carbone est-elle un indicateur écophysiologie pertinent de l’efficience d’utilisation de l’eau de l’hévéa ?" Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0240/document.
The rubber (Hevea brasiliensis) plantations extend to non-traditional area in Thailand where dryer conditions has been reported to impair the growth of rubber trees and latex production. Physiological parameters helpful for breeding adapted genotypes are required, such as water use efficiency (WUE). Carbon isotope discrimination is widely used as a proxy for WUE that can easily be used for selection and breeding programs for drought tolerance. Leaf δ13C and leaf gas exchange were measured on young saplings of 10 rubber clones growing in pot in a common garden. The range of leaf δ13C among 10 clones was narrow and the correlation between δ13C and WUEi was significant under high vapour pressure deficit only, which means the prediction of WUE by δ13C would have low precision. There were large δ13C variations among the genotypes at all seasons in a collection of 49 wild genotypes of rubber in Northeastern Thailand. δ13C was rather stable with a good correlation between rainy and dry season. The genetic variability of δ13C is promising for breeding if a good correlation between δ13C of leaf and WUE can be established. The lack of correlation between δ13C of latex (δ13C-L) and of leaf soluble compounds (δ13C-S) collected from tapped and untapped 20 year-old rubber trees suggests that recent photosynthates are mixed in the large pool of stored carbohydrates that are involved in latex regeneration after tapping. Thus δ13C of latex is not a relevant indicator of WUE of rubber trees
Fusetti, Luc. "Elaboration d'un modèle cinétique en vue de predire la composition moléculaire et isotopique des gaz naturels issus du craquage des hydrocarbures." Paris 6, 2009. http://www.theses.fr/2009PA066262.
Launois, Thomas. "Modélisation de la composition isotopique des cernes d'arbres (13C et 18O) et des transferts de COS entre l'atmosphère et la biosphère continentale pour quantifier les flux bruts de carbone." Thesis, Versailles-St Quentin en Yvelines, 2014. http://www.theses.fr/2014VERS0039/document.
In the context of global climate change, the behavior of the terrestrial biosphere can be durably affected by the increased frequency and intensity of extreme climatic events, which can decrease the photosynthetic assimilation of carbon and/or increase the respiration rate of the ecosystems. Therefore, quantifying the carbon storage capacity of the ecosystems and predicting their sensitivity to climate changes strongly rely on our capacity to separately estimate the photosynthesis and respiration rates at different scales. The gross primary productivity (GPP) is however not directly measurable. Indirect approaches have been proposed to estimate the biospheric gross fluxes (GPP and respiration), combining for instance stable isotopologues of CO2 (13C and 18O), and, more recently, the measure of carbonyl sulfide (COS) concentrations in the atmosphere. In this context, my PhD work followed two complementary approaches. In the first approach, isotopic measurements and tree-ring widths were used, because both of them are linked to the photosynthetic activity. The inter-annual variations of the photosynthetic fluxes simulated with the ORCHIDEE continental biosphere model were evaluated and compared with in situ measurements. The second approach consisted in using atmospheric measurements of OCS concentrations and in exploring their potential to constrain the current estimates of the GPP in dynamic global vegetation models (DGVM), by (1) establishing a new global budget of sources and sinks of this gas, (2) optimizing the source and sink terms of this cycle and (3) estimating the potential of this new tracer to validate/invalidate the simulated GPP when using current DGVMs
Bartholomé, Jérôme. "Déterminisme génétique de la dynamique de croissance et de la composition isotopique du carbone chez l'Eucalyptus en réponse aux variations environnementales." Thesis, Montpellier, SupAgro, 2014. http://www.theses.fr/2014NSAM0011/document.
Scenarios of climate changes forecast an increase in frequency and intensity of droughts, related to an increase of global temperatures and changes in rainfall distribution. Growth of forest trees highly depends on water availability and will be significantly impacted by these changes. The understanding of the impact of genetic and environmental factors on the growth dynamics is a major challenge to ensure production levels of future planted forests. Eucalyptus, thanks to its rapid growth and the availability of genetic and genomic resources, is a perfect model to conduct this research.The objective of this thesis is to characterize the genetic architecture of growth dynamics in Eucalyptus at different time scales, in relation with: (i) environmental changes, including changes in water availability, and (ii) isotopic composition of carbon (delta 13C), a character associated with water-use efficiency. To this end, an interspecific cross between E. urophylla x E. grandis was studied in four experimental trials in the Republic of Congo. Our approach, based on mapping of quantitative trait loci (QTL), combines (i) a high-throughput genotyping, (ii) a characterization of inter and intra-annual growth dynamics and delta 13C, as well as a continual measurement of stem radial micro-variations and (iii) a continual characterization of environmental factors.First of all, this work led to the construction of the first high-resolution genetic maps in Eucalyptus, improving the sequence of the reference genome. Then, the analysis of genetic architecture of delta 13C enabled the identification of positional candidate genes which might be involved in the variation of this trait. Finally, inter and intra-annual characterization of growth dynamics highlight that genetic architecture of adult growth is structured by responses to the environment at the juvenile stage. These responses were then analyzed using daily profiles of stem radial micro-variations, which enabled the characterization of the genetic determinants of response to the environmental factors at the juvenile stage.Our results highlight the importance of considering growth as a dynamic trait, not only to understand its genetic basis, but also to select in a changing environment
Fiorini, Sarah. "Effet de l'augmentation de la pression partielle du dioxyde de carbone et de la température sur le phytoplancton calcifiant (coccolithophoridés)." Paris 6, 2009. http://www.theses.fr/2009PA066586.
Launois, Thomas. "Modélisation de la composition isotopique des cernes d'arbres (13C et 18O) et des transferts de COS entre l'atmosphère et la biosphère continentale pour quantifier les flux bruts de carbone." Electronic Thesis or Diss., Versailles-St Quentin en Yvelines, 2014. http://www.theses.fr/2014VERS0039.
In the context of global climate change, the behavior of the terrestrial biosphere can be durably affected by the increased frequency and intensity of extreme climatic events, which can decrease the photosynthetic assimilation of carbon and/or increase the respiration rate of the ecosystems. Therefore, quantifying the carbon storage capacity of the ecosystems and predicting their sensitivity to climate changes strongly rely on our capacity to separately estimate the photosynthesis and respiration rates at different scales. The gross primary productivity (GPP) is however not directly measurable. Indirect approaches have been proposed to estimate the biospheric gross fluxes (GPP and respiration), combining for instance stable isotopologues of CO2 (13C and 18O), and, more recently, the measure of carbonyl sulfide (COS) concentrations in the atmosphere. In this context, my PhD work followed two complementary approaches. In the first approach, isotopic measurements and tree-ring widths were used, because both of them are linked to the photosynthetic activity. The inter-annual variations of the photosynthetic fluxes simulated with the ORCHIDEE continental biosphere model were evaluated and compared with in situ measurements. The second approach consisted in using atmospheric measurements of OCS concentrations and in exploring their potential to constrain the current estimates of the GPP in dynamic global vegetation models (DGVM), by (1) establishing a new global budget of sources and sinks of this gas, (2) optimizing the source and sink terms of this cycle and (3) estimating the potential of this new tracer to validate/invalidate the simulated GPP when using current DGVMs
Gontharet, Swanne. "Les suintements hydrothermaux froids et leur impact sur l'écosystème benthique." Paris 6, 2006. http://www.theses.fr/2006PA066364.
Kallel, Nejib. "Variation de la composition isotopique de l'oxygène et du carbone des foraminifères : traceur de la circulation océanique pendant le dernier maximum glaciaire et lors de la dernière déglaciation." Paris 11, 1988. http://www.theses.fr/1988PA112124.
Oxygen and carbon isotopic composition of benthic foraminifera from different oceanic sediment cores have been used to reconstruct the pattern of intermediate and deep ocean circulation during last glacial maximum (18,000 years BP) in the Indian and Pacifie oceans. Results show that the glacial oceanic circulation was significantly different from the modern one. A deep hydrological front separated intermediate water of the Indian and Equatorial Pacifie from underlying deep water. Glacial intermediate water was weil ventilated and has approximately the same temperatures than today. By contrast, glacial deep water was cooler by severa!degrees than modern one. In the Pacifie ocean, deep water was more ventilated than that in the Southern Indian ocean indicating the formation of relatively ventilated deep water in the South Pacifie or the increase of the influence of the North Pacifie Intermediate Water. As late as 12,500 yr BP deep oceanic circulation was similar to the glacial one. The decrease of the influence of the North Pacific Intermediate Water has appeared at about 12,500 yr BP and the onset of the active formation of the North Atlantic Deep Water has appeared at about 9,000 yr BP. Holocene conditions have been reached at about 8,000 yr BP in ali oceans and at ali water depths
Books on the topic "Composition isotopique du carbone":
Heller, Julia. Le compteur alimentaire: Calories, protéines, matières grasses, hydrates de carbone, cholestérol, sodium, fibres. 4th ed. Montréal: Quebecor, 2011.
Canada. Bureau de contrôle du tabac. Niveaux de goudron, nicotine et oxyde de carbone comme indiqué sur les paquets de cigarettes. Ottawa, Ont: Santé Canada, 1997.
Book chapters on the topic "Composition isotopique du carbone":
"C. La composition de l’atmosphère et la datation au carbone 14." In L'Apprentissage de la critique, 139–42. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2383-3-011.
"C. La composition de l’atmosphère et la datation au carbone 14." In L'Apprentissage de la critique, 139–42. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2383-3.c011.
RAPIN, Christophe, Eléonore DURAND, and Marie-Alice SKAPER. "Recyclage et valorisation du matériau verre." In Le recyclage, enjeu pour l’économie circulaire, 245–72. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9162.ch10.
Herrscher, Estelle, Gwenaëlle Goude, and Laure Metz. "Modification de la composition isotopique (C, N) du lait maternel au cours des premiers mois d’allaitement." In Premiers cris, premières nourritures, 239–47. Presses universitaires de Provence, 2019. http://dx.doi.org/10.4000/books.pup.34558.
Odin, G. S., and L. Turpin. "Chapitre B2b Composition isotopique du strontium à la limite Campanien-Maastrichtien; étude à Tercis les Bains (Landes, France) et comparaison avec d'autres bassins." In Developments in Palaeontology and Stratigraphy, 166–71. Elsevier, 2001. http://dx.doi.org/10.1016/s0920-5446(01)80017-0.
Reports on the topic "Composition isotopique du carbone":
Hillaire-Marcel, C. Composition isotopique du carbone organique des carottes du forage 85 - 036 - 016 dans le Lac Bras D'or, Ile Du Cap-Breton, Nouvelle-Écosse. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/122495.