Gotowa bibliografia na temat „Abondaces chimiques”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Spis treści
Zobacz listy aktualnych artykułów, książek, rozpraw, streszczeń i innych źródeł naukowych na temat „Abondaces chimiques”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Artykuły w czasopismach na temat "Abondaces chimiques"
Nola, M., T. Njine, V. F. Sikati i E. Djuikom. "Distribution de Pseudomonas aeruginosa et Aeromonas hydrophila dans les eaux de la nappe phréatique superficielle en zone équatoriale au Cameroun et relations avec quelques paramètres chimiques du milieu." Revue des sciences de l'eau 14, nr 1 (12.04.2005): 35–53. http://dx.doi.org/10.7202/705407ar.
Pełny tekst źródłaPain, Jean-Christophe. "L’hélio-sismologie et l’énigme de l’opacité du fer". Reflets de la physique, nr 58 (czerwiec 2018): 10–15. http://dx.doi.org/10.1051/refdp/201858010.
Pełny tekst źródłaHoltzapffel, T., i H. Chamley. "Les smectites latées du domaine Atlantique depuis le Jurassique superieur: gisement et signification". Clay Minerals 21, nr 2 (czerwiec 1986): 133–48. http://dx.doi.org/10.1180/claymin.1986.021.2.03.
Pełny tekst źródłaIbn Majdoub Hassani, L., M. Khodari i M. Alaoui-Mhamdi. "Étude du régime alimentaire de deux souches de truite arc-en-ciel marocaine et bulgare dans deux plans d'eau du Moyen-Atlas Amghass I et Amghass II". Revue des sciences de l'eau 15, nr 1 (12.04.2005): 165–76. http://dx.doi.org/10.7202/705444ar.
Pełny tekst źródłaBen Moussa, Amor, Houcem Mzali, Hatem Elmejri i Sarra Bel Haj Salem. "Apport des outils hydrogéochimiques à l'évaluation de la qualité et l'aptitude des eaux souterraines à l'irrigation : cas de la nappe phréatique de la basse vallée de Medjerda, Tunisie Nord-Orientale". La Houille Blanche, nr 5-6 (grudzień 2019): 35–44. http://dx.doi.org/10.1051/lhb/2019053.
Pełny tekst źródłaBodian, Seckou, Mactar Faye, Vincent Sambou, N. Awa Séne, Ibrahima Diaw i Kory Faye. "CARACTÉRISATION PHYSICO-CHIMIQUE DES MATIÈRES PREMIÈRES ARGILEUSES DE LA CARRIÈRE DE THICKY (SÉNÉGAL) POUR LA FABRICATION DE BRIQUES EN TERRE". Journal de Physique de la SOAPHYS 3, nr 1 (15.11.2021): CA21A01–1—CA21A01–7. http://dx.doi.org/10.46411/jpsoaphys.2021.01.01.
Pełny tekst źródłaAGABRIEL, C., J. B. COULON i G. MARTY. "Facteurs de variation du rapport des teneurs en matières grasses et protéiques du lait de vache : étude dans les exploitations des Alpes du Nord". INRAE Productions Animales 4, nr 2 (31.05.1991): 141–49. http://dx.doi.org/10.20870/productions-animales.1991.4.2.4326.
Pełny tekst źródłaAkpo, Léonnard Elie, Dominique Masse i Michel Grouzis. "Durée de jachère et valeur pastorale de la végétation herbacée en zone soudanienne au Sénégal". Revue d’élevage et de médecine vétérinaire des pays tropicaux 55, nr 4 (1.04.2002): 275. http://dx.doi.org/10.19182/remvt.9815.
Pełny tekst źródłaElaieb, Mohamed Tahar, Ahmed Namsi, Marie Tella, Gaël Senecal, Marie-France Thevenon i Kévin Candelier. "A natural ancestral saltwater treatment to modify the technological properties of date palms". BOIS & FORETS DES TROPIQUES 338 (11.02.2019): 15. http://dx.doi.org/10.19182/bft2018.338.a31676.
Pełny tekst źródłaJonas, Ablé Guiako, Féa Issac, Yao N’Goran, Bamba Moritié Kader i Doukouré Mamery. "Étude des Réservoirs Gréseux des Zones Sud et Sud-Est de la Marge d’Abidjan (Côte d’Ivoire)". European Scientific Journal, ESJ 18, nr 40 (31.12.2022): 187. http://dx.doi.org/10.19044/esj.2022.v18n40p187.
Pełny tekst źródłaRozprawy doktorskie na temat "Abondaces chimiques"
Dutil, Yvan. "Les abondances chimiques dans les galaxies spirales de type précoce". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq26059.pdf.
Pełny tekst źródłaVan, der Swaelmen Mathieu. "Évolution chimique du Grand Nuage de Magellan". Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00833887.
Pełny tekst źródłaLebouteiller, Vianney. "Abondances chimiques dans le gaz neutre des régions à flambée de formation d'étoiles". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00448226.
Pełny tekst źródłaThévenin, Frédéric. "Contribution a l'etude des abondances des populations stellaires". Paris 7, 1987. http://www.theses.fr/1987PA077294.
Pełny tekst źródłaTitarenko, Anastasia. "Indicateurs chimiques d’âge stellaire à l’ère de Gaia". Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4065/document.
Pełny tekst źródłaStars record the past in their ages, chemical compositions and kinematics. They can provide unprecedented detailed constraints on the early epochs of galaxy formation, back to redshifts greater than two (a look-back time of around 10 billion years). In particular, stellar ages are crucial to the understanding of the Milky Way history and for comparison with galactic evolution models. The advent of the Gaia space mission has opened the path to stellar age estimations for large samples of stars, in particular, based on isochrone fitting methods. In addition, Gaia precise distances allow to develop indirect age estimations based on the stellar population chemical evolution clock. In fact, the chemical abundance patterns imprinted on stellar atmospheres represent the gas conditions at the time of the stars’ formation back to redshifts greater than two. The chemical evolution products of different nucleosynthetic channels can therefore provide a time proxy. After calibration, it can be used as an age estimator.This thesis is focussed on the use of a particular chemical clock, the [Y/Mg] abundance. To this purpose, the astrometric Gaia mission data from the first data release was combined with high resolution spectroscopic data from the AMBRE-HARPS catalogue. First of all, the object identification of the AMBRE archival data was improved, thanks to a cross match with the 2MASS catalog, and later the Gaia DR1. In total, 6776 different stars have been identified.Secondly, in order to obtain precise estimations of the [Y/Mg] abundance ratio for galactic disc stars, the automated GAUGUIN tool integrated in the Gaia DPAC APSIS chain, has been optimized and tested. In particular, the abundance estimation capabilities of the APSIS GAUGUIN tool have been improved for irregularly distributed synthetic spectra grids, spanning a large range in stellar atmospheric parameters.Thirdly, the [Y/Mg] abundance ratio has been estimated for about 2000 stars from the AMBRE HARPS spectroscopic data. In addition, the internal and external errors of the abundances were carefully analysed. The studied stars belong mainly to the galactic thin and thick disc, in the metallicity range from --1.0 dex to 0.5 dex.Fourth, thanks to the isochrone fitting age estimations of 342 turn-off stars of the sample, the age sensitivity of the [Y/Mg] ratio has been studied. The analysis reveals a clear correlation between [Y/Mg] and age for thin disk stars of different metallicities, in synergy with previous studies of Solar type stars. In addition, no metallicity dependence with stellar age is detected, allowing to use the [Y/Mg] ratio as a reliable age proxy.Finally, the [Y/Mg] vs. age relation presents a discontinuity between thin and thick disk stars around 9–10 Gyrs. For thick disk stars, the correlation has a different zero point and probably a steeper trend with age, reflecting the different chemical evolution histories of the two disk components
Blanco-Cuaresma, Sergi. "Test de la technique de marquage chimique avec des amas ouverts". Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0079/document.
Pełny tekst źródłaContext. Stars are born together from giant molecular clouds and, if weassume that they were chemically homogeneous and well-mixed, we expect them toshare the same chemical composition.Most of the stellar aggregates are disrupted while orbiting the Galaxy and thedynamic information is lost, thus the only possibility to reconstruct the stellarformation history is to analyze the chemical abundances that we observe today.Aims. The chemical tagging technique aims to recover disrupted stellarclusters based merely on their chemical composition. We evaluate the viability of thistechnique to recover conatal stars that are not gravitationally bound anymore.Methods. We built a high-quality stellar spectra library to facilitate theassessment of spectral analyses. We developed our own spectral analysisframework, named iSpec, capable of homogeneizing stellar spectra and derivingatmospheric parameters/chemical abundances. Finally, we compiled stellar spectrafrom 32 Open Clusters, homogeneously derived atmospheric parameters and 17abundance species, and applied machine learning algorithms to group the starsbased on their chemical composition. This approach allows us to evaluate theviability of the chemical tagging technique.Results. We found that stars in different evolutionary stages havedistinguished chemical patterns may be due to NLTE effects, atomic diffusion, mixingand correlations from atmospheric parameter determinations. When separating starsper evolutionary stage, we observed a high degree of overlapping among OpenCluster’s chemical signatures, making it difficult to recover conatal aggregates byapplying the chemical tagging technique
Lecureur, Aurélie. "Contraintes observationnelles sur la formation et l’évolution chimique du bulbe galactique". Observatoire de Paris (1667-....), 2007. https://hal.science/tel-02071421.
Pełny tekst źródłaThe Milky Way bulge shows contradictory features. Its structure and shape are close to those of late-type galaxies which are believed to be made secularly out of the disk instabilities (“pseudo-bulges”). However, its stellar population seems to be old and metal-rich in line with the typical characteristics of Sa and Sb spheroids (“classical bulge”). Using the FLAMES instrument (VLT), we observed 5 samples of about 230 bulge giants stars in 4 fields spread perpendicularly to the galactic plane from b=-3° to b=-12°. Intermediate resolution spectra (R~ 20000) have been obtained with the FLAMES/GIRAFFE spectrograph for all stars and 55 have also been observed with the high resolution spectrograph FLAMES/UVES (R~48000). This thesis is based on the analysis of the 55 UVES stars for which we obtained oxygen, magnesium, aluminum and sodium abundances as well as on the Red Clump giants GIRAFFE sample in Baade’s Window (l = 1°, b = -4°) for which individual metallicities ([Fe/H]) have been measured. For this work, an automatic method has been specifically developed to deal with the issues arising from the analysis of these heavily reddened metal-rich giant stars. Our study establishes, a bulge metallicity distribution (MD) in the Baade’s Window entirely based, for the first time, on a large sample (220 stars), with [Fe/H] values coming from the analysis of intermediate resolution spectra and consequently more precise than previous studies. This allow us to confirm some of the MD characteristics and to highlight new ones : (i) a sharp decrease at high metallicities ([Fe/H]>0. 5, (ii) a large number of stars with supersolar metallicities (50 % with [Fe/H]>0. 16, 25% with [Fe/H]>0. 38) and (iii) few metal poor star (about 2% of stars with -1. 1 [Fe/H]<-0. 7). The abundance results of O, Na, Mg and AI from the UVES spectra show that the bulge have encountered a chemical evolution distinct from the galactic thin and thick disks. The bulge oxygen and magnesium ratios relative to iron are higher than those on both galactic disks, which point towards a shorter formation timescale for the galactic bulge. The comparison of the MD and -α (O and Mg) abundances with those predicted by chemical evolution models suggests an extremely efficient and fast stellar formation, which would have been suddenly stopped via SNe winds. Some models also predict a flatter IMF, favouring massive stars. Moreover, an detailed inspection of the massive stars nucleosynthesis has shown that : (i) the bulge stars [O/Mg] ratio follows and extends the decreasing trend of [O/Mg] found in the galactic disks to higher metallicities. This decrease at the highest metallicities is not predicted by theoretical models massive stars, (ii) th [Na/Mg] ratio trend with increasing [Mg/H] is found to increase in three distinct sequences in the thin disk, the thick disk and the bulge. This point to an additional source of Na (AGB) in addition to the massive stars contribution
Toqué, Nathalie. "Diffusion turbulente anisotrope dans les zones radiatives d'étoiles". Thèse, Paris 6, 2004. http://hdl.handle.net/1866/17334.
Pełny tekst źródłaMaret, Sébastien. "Structure physico-chimique des proto-étoiles de faible masse". Phd thesis, Université Paul Sabatier - Toulouse III, 2003. http://tel.archives-ouvertes.fr/tel-00003798.
Pełny tekst źródłaCastro, Matthieu. "Etude des éléments chimiques et tests sismiques de la structure interne du Soleil et des étoiles". Phd thesis, Université Paul Sabatier - Toulouse III, 2006. http://tel.archives-ouvertes.fr/tel-00128196.
Pełny tekst źródłaLes deux premières parties de ce manuscrit présentent de manière théorique les processus de transport et les principes de l'astérosismologie utilisés dans les modèles stellaires.
La troisième partie s'interesse à la signature astérosismique de la diffusion de l'hélium dans les étoiles de type F tardives et à son évolution. Nous montrons que le gradient créé par la diffusion de l'hélium sous la zone convective conduit à un pic dans le transformée de Fourier des secondes différences de spectre de fréquences d'oscillations. Plus le gradient est important, plus l'amplitude du pic est grande.
Le quatrième chapitre étudie la destruction du lithium dans les étoiles avec planètes. De récentes observations de Israelian et al. (2004) montrent que les étoiles froides avec planètes présentent une destruction du lithium importante, contrairement aux étoiles sans planètes. Nos modèles surmétalliques ont permis de montrer d'une part que le gradient de µ pouvait stabiliser le mélange dans les étoiles sans planètes, empêchant la destruction du lithium, et d'autre part que cette destruction dans les étoiles avec planètes pouvait provenir d'instabilités de cisaillement dues à la migration des planètes vers leur étoile centrale.
Enfin, la cinquième partie présente un travail sur les modèles solaires avec les nouvelles abondances de Asplund et al. (2005), qui présentent un désaccord avec les déductions héliosismiques. Nos modèles simulant une accrétion sous-métallique au début de la séquence principale améliorent la situation mais ne réussissent pas à rétablir l'accord avec l'héliosismologie, malgré l'introduction d'un overshooting et d'un mélange rotationnel sous la base de la zone convective.
Części książek na temat "Abondaces chimiques"
DEL MAR SAAVEDRA RIOS, Carolina, Adrian BEDA, Loic SIMONIN i Camélia MATEI GHIMBEU. "Le carbone dur pour les batteries Na-ion : de la synthèse aux performances et mécanismes de stockage". W Les batteries Na-ion, 123–74. ISTE Group, 2021. http://dx.doi.org/10.51926/iste.9013.ch3.
Pełny tekst źródła