Academic literature on the topic 'Méthodes RMN'
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Journal articles on the topic "Méthodes RMN":
Merniz, Salah, Louiza Himed, Mahieddine Mokhtari, and Abdelhamid Mousser. "Marquage du 2-aminothiazole avec une unité cyclohexadiène fer tricabonyle. Étude structurale et activité antibactérienne du complexe marqué (1-4-η-5-N-2-aminothiazoliocyclohexa-1,3-diène) fer tricarbonyle." Canadian Journal of Chemistry 97, no. 10 (October 2019): 704–10. http://dx.doi.org/10.1139/cjc-2019-0016.
Silly, Gilles, Monique Body, Jean-Yves Buzaré, Christophe Legein, and Bruno Bureau. "Les fluorures inorganiques, des matériaux modèles pour tester les méthodes de calcul de paramètres RMN (déplacement chimique et paramètres quadripolaires)." Comptes Rendus Chimie 7, no. 3-4 (March 2004): 403–16. http://dx.doi.org/10.1016/j.crci.2004.02.006.
Mejbri, R., G. Matejka, P. Lafrance, and M. Mazet. "Fractionnement et caractérisation de la matière organique des lixiviats de décharges d'ordures ménagères." Revue des sciences de l'eau 8, no. 2 (April 12, 2005): 217–36. http://dx.doi.org/10.7202/705220ar.
Sakho, Adama Moussa, Aboubacar Diallo, Kaba Conde, Damany Keita, Mamady Kourouma, Dong Sheng Zhu, and Bangaly Dioumessy. "Synthèse, caractérisation et l’activité anti-tumorale d’un complexe organo-étain carboxylique." International Journal of Biological and Chemical Sciences 14, no. 3 (June 19, 2020): 1133–43. http://dx.doi.org/10.4314/ijbcs.v14i3.38.
Bloch, Gilles. "Les méthodes d'imagerie médicale." Revue Générale Nucléaire, no. 4 (August 2001): 30–35. http://dx.doi.org/10.1051/rgn/20014030.
Büttgen, Philippe. "Doctrine et méthode." Revue de métaphysique et de morale 62, no. 2 (2009): 187. http://dx.doi.org/10.3917/rmm.092.0187.
Le Grand, Flore, and Serge Akoka. "Détermination des abondances isotopiques spécifiques par RMN–2H et la méthode ERETIC." Comptes Rendus Chimie 7, no. 3-4 (March 2004): 233–39. http://dx.doi.org/10.1016/j.crci.2003.11.005.
Labeyrie, Jacques. "Les méthodes de datation développées au CEA." Revue Générale Nucléaire, no. 6 (November 1989): 439–47. http://dx.doi.org/10.1051/rgn/19896439.
Charles, J. "Les méthodes de calcul du coût de production du kWh électrique. Comparaison entre trois méthodes : française, AIEA, américaine." Revue Générale Nucléaire, no. 4 (July 1986): 344–49. http://dx.doi.org/10.1051/rgn/19864344.
Gaichies, L., A. Gueneuc, A. Molin, M. Begorre, A. C. Pizzoferrato, M. H. Read, J. Coudray, M. Dreyfus, and G. Benoist. "Évaluation des pratiques de dépistage de la trisomie 21 au sein du réseau de périnatalité de Basse-Normandie." Périnatalité 11, no. 1 (January 8, 2019): 54–62. http://dx.doi.org/10.3166/rmp-2019-0039.
Dissertations / Theses on the topic "Méthodes RMN":
Heude, Clément. "Développement de nouvelles méthodes analytiques dans l'agroalimentaire par RMN." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAD038/document.
Most of the current analytical and quality control methods in the food industry are based on a targeted approach, with an upstream definition of the intended contaminants, and may fail to detect some frauds or contaminations of genuine products. It is around this issue that the Agrifood GPS (Global Protection System), of which this thesis is part of, has been initiated. This project aims at developing new holistic analytical methods (untargeted) in order to ensure the integrity of the foodstuff analyzed. This thesis manuscript gathers the results obtained on semi-solid foodstuffs (mainly fish), by High Resolution Magic Angle Spinning NMR, and on caviar extracts by high resolution liquid-state NMR (HR NMR). First of all, it presents a rapid method to evaluate fish freshness and quality based on the determination of two chemical indicators (the TMA-N and the K-value) and the results of a fish texture study through the measurement of the transverse relaxation time (T2) of water in muscle tissues, both by HR-MAS NMR spectroscopy. Thereafter, are presented the results of the work carried out on the determination of the geographical origin of caviar using the metabolic profile acquired by liquid-state NMR spectroscopy and multivariate statistical analysis in the context of the PGI (Protected Geographical Indication) status for the Aquitaine producers, and on the degradation study of caviar during its storage in a fridge
Mafra, Luis Miguel Monteiro. "RMN de matériaux cristallins inorganiques-organiques hybrides : méthodes et applications." Caen, 2006. http://www.theses.fr/2006CAEN2033.
In the first part of this thesis, I present some basic NMR concepts, focusing on the 1H homonuclear decoupling, based on Frequency-Switched Lee-Goldburg (FSLG) methods. The optimisation of the experimental conditions which afford high-resolution two-dimensional NMR spectra is discussed. In the second part, a number of NMR case studies centred on inorganic-organic hybrid materials are described. These solids are rich in 1H nuclei and their 1H NMR spectral lines are usually broadened homogeneously by the strong homonuclear dipolar couplings. Here, I show that FS-LG decoupling is a very powerful and robust technique to study these materials, allowing the acquisition, under 1H highresolution, of 2D homo and heteronuclear correlation NMR spectra. Dipolar recoupling techniques such as BABA, POSTC7 and RFDR were also employed. When used in tandem with X-ray diffraction data, the information forthcoming from these NMR studies provides a clear structural picture of the hybrid materials. In the third part of this thesis, I introduce a new NMR method to study I = 3/2 and 5/2 quadrupole nuclei in powdered solids. A “multiplex” phase cycling procedure is employed, which allows recording separately each coherence transfer pathway (CTP), for post acquisition, signal selection and processing. This new method allows performing multiple experiments with distinct CTPs, during the timespan of a single experiment. Finally, I demonstrate that coupling the so-called “soft-pulse added mixing” (SPAM) and “double-multiplex” phase cycling allows a considerable reduction in the experimental time as compared to the simple multiplex method
Hamdoun, Ghanem. "Nouvelles méthodes RMN pour la caractérisation structurale et dynamique des agrégats organolithiés." Rouen, 2014. http://www.theses.fr/2014ROUES018.
Because of their high reactivity and diversity, alkyllithium compounds are important reagents for both organic and polymer chemistry. In solution, these species exist as hexamers, tetramers, trimers, or dimers forms, depending on temperature, concentration, solvent, and on the nature of the alkyl chain. In the presence of oxygen, they lead to many kinds of mixed alkyllithium/lithium alkoxide aggregates in solution as they react with oxygen to give alkoxides and peroxides. The formation of those mixed aggregates, whose properties may be quite different from those of either pure component, affects substantially the reactivity of the alkyllithium coumpounds. The main objective of this work was to determine the structure, the solvation and aggregation states of pure alkyllithium compounds (Et6Li, Pr6Li, Bu7Li) and mixed alkyllithium/lithium peroxide aggregates, in THF, at low temperature. We have shown that these alkyllithium compounds existed as tetramer, and dimer forms in exchange within a dissociative mechanism. In the presence of the corresponding lithium alkoxide, a mixture of 5 tetra-solvated tetramers is formed. 1H Pure shift DOSY NMR was used for the characterization and the quantitative estimation of degree of solvation and aggregation state of n-butyllithium/lithium n-butoxide mixed aggregates. In the second part of this work, we have thought to use a new NMR method for the measurement of very weak 6,7Li-6,7Li scalar coupling. The strategy we used consisted in doubling the spin-spin splitting without altering the line width by the introduction of a scale factor into a 2D NMR J-resolved like experiment, named “SERF”. For more complex systems we have shown that the CT-COSY experiment in lithium 7 observation could be an alternative tool, resulting in accurate measurements of J7Li-7Li
Stratmann, Dirk. "Nouvelles méthodes pour l'attribution de spectres RMN de protéines de structure tridimensionnelle connue." Paris 6, 2008. http://www.theses.fr/2008PA066667.
A prerequisite for any protein study by NMR is the assignment of the resonances from the 15N-1H HSQC spectrum to their corresponding atoms of the protein backbone. A new type of assignment strategy exploits the information given by an already available 3D structure of the same or a homologous protein. Up to now, the algorithms that have been developed around this strategy have two important drawbacks: they cannot guarantee the accuracy of the assignment and they are not applicable to large proteins. First is shown that the use of residual dipolar couplings (RDC) for the structure based assignment can be problematic, especially the estimation of the alignment tensor is difficult. A novel structure based assignment approach, called NOEnet, is presented here. NOEnet is not based on RDCs but on Nuclear Overhauser Effects (NOEs). RDCs, chemical shifts (CS) and almost any kind of data can be included in NOEnet through a general filter approach. NOEnet exploits the network property of unambiguous HN-HN NOE constraints to realize an exhaustive search of all matching possibilities of the NOE network on the structural one. Its efficient complete search algorithm ensures the correctness of the assignment results. NOEnet has been successfully tested on several proteins up to 28 kDa, using only NOE data or a combination of NOE, RDC and CS data
Negrevergne, C. "Controle quantique grâce aux méthodes de RMN. Application à la simulation de systèmes quantiques." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2002. http://tel.archives-ouvertes.fr/tel-00004371.
Les methodes de Resonance Magnetique Nucleaire en solution permettent d'initialiser, de manipuler et d'observer l'etat d'un systeme de spins 1/2 couples. ces methodes ont ete utilisees pour realiser experimentalement un petit processeur d'information quantique (QIP pour "Quantum Information processor") pouvant executer une centaine d'operations elementaires. un des themes principaux de ce travail a ete de concevoir, d'optimiser et de valiser des sequences d'impulsions necessaires pour "programmer" ce QIP.
ces techniques ont ete utilises pour executer un algorithme quantique de simulation des systemes anyoniques. des resultats experimentaux pour la determination des energies propres et de fonctions de correlation d'un systeme illustratif de fermions sur reseaux ont ete obtenus permettant de valider l'algorithme de simulation dans son principe et son execution experimentale.
Recht, Raphaël. "Mise au point de méthodes de détection d’interaction ligand-macromolécule par RMN du 19F." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAJ055/document.
Biological interactions are under the control of complex mechanisms, across different scales, in time of in size. It is particularly true for the ribosome, a nucleoprotein responsible for the mRNA translation into proteins, and thus, a primary therapeutic target. The size of the prokaryotic 70S ribosome (2.4 MDa) is a problem for the application of classical ligand screening method. During my thesis, I explored using fluorine NMR to characterize the interaction between ligands and the prokaryotic ribosome. This strategy was motivated by new detection approaches that can combine NMR (Nuclear Magnetic Resonance) versatility with the fluorine atom properties. The 19F atom is perfectly suited for NMR, with its gyromagnetic ratio close to the proton one and its isotopic abundance of 100%. Moreover, the fluorine is absent from natural compounds. Finally, the physicochemical characteristics of fluorine are well exploited in the pharmacopeia (a fourth of all antibiotics has a fluorine moiety)
Negrevergne, Camille. "Contrôle quantique grâce aux méthodes de RMN : application à la simulation de systèmes quantiques." Bordeaux 1, 2002. http://www.theses.fr/2002BOR12593.
Izquierdo, Marguerite. "Caractérisation spectrale en spectroscopie RMN in vivo : contribution au développement de méthodes physiques d'investigation." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10153.
Sahnoun, Souleymen. "Développement de méthodes d'estimation modale de signaux multidimensionnels. Application à la spectroscopie RMN multidimensionnelle." Phd thesis, Université de Lorraine, 2012. http://tel.archives-ouvertes.fr/tel-00788022.
Sahnoun, Souleymen. "Développement de méthodes d'estimation modale de signaux multidimensionnels. Application à la spectroscopie RMN multidimensionnelle." Electronic Thesis or Diss., Université de Lorraine, 2012. http://www.theses.fr/2012LORR0169.
This thesis aims at the developpement of modal analysis algorithms for multidimensional signals (R-D) presenting resolution and numerical complexity problems. A multidimensional signal of dimension R is the superimposition of products of R monodimensional sinusoids. The intended application is NMR spectroscopy. Firstly, after a state-of-the-art on the so-called ''algebraic'' estimation methods, we propose a parametric method based on tensors. It uses the multidimensional tensor lattice of the R-D modal signal and exploits the eigenvectors structure of the signal subspace obtained using a higher-order singular value decomposition (HOSVD). Unlike most tensor-based eigenvalue approaches, modes estimated by the proposed method are automatically paired, thus it avoids a separate pairing step and joint diagonalization. Secondly, the multidimensional modal estimation problem is formulated as a sparse approximation problem in which the dictionary is obtained by the discretization of complex exponential functions. To achieve good spectral resolution, it is necessary to choose a very fine grid, which leads to handling a large dictionary with all the underlying computational problems. Hence, we propose a novel method that consists in combining a sparse approximation and a multigrid approach on several levels of resolution. The approach is demonstrated using several 1-D and 2-D examples. In addition, the influence of the initial dictionary on the algorithm convergence is also studied. The developed methods are then applied to estimate 1-D and 2-D NMR signal parameters. To reduce the computation cost in the case of large bidimensional signals, we also propose an approach exploiting the simultaneous sparsity principle to estimate the coordinates of the modes on each dimension. The procedure involves two 1-D sparse approximations followed by a 2-D modes painring step
Books on the topic "Méthodes RMN":
Canet, Daniel. La RMN: Concepts et méthodes. Paris: InterEditions, 1991.
Canet. La RMN : Concepts, méthodes et applications, 2e décision. Dunod, 2002.
Book chapters on the topic "Méthodes RMN":
"Chapitre 5 Principales méthodes d’imagerie RMN." In Imagerie de résonance magnétique, 315–450. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0922-6-006.
"Chapitre 5 Principales méthodes d’imagerie RMN." In Imagerie de résonance magnétique, 315–450. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0922-6.c006.
Ranjeva, Jean-Philippe, Wafaa Zaaraoui, Bertrand Audoin, and Jean Pelletier. "Méthodes de RMN avancées et explorations intégrées." In Neuropsychologie de la sclérose en plaques, 165–75. Elsevier, 2010. http://dx.doi.org/10.1016/b978-2-294-70469-7.00017-4.