Academic literature on the topic 'Spectrométrie de masse à faisceau moléculaire'
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Journal articles on the topic "Spectrométrie de masse à faisceau moléculaire":
Philippe RIEGEL, Yann DUMONT, Jacques CROIZÉ, and Olivier DAUWALDER. "SYSTÈMES AUTOMATIQUES D’IDENTIFICATION BACTÉRIENNE." ACTUALITES PERMANENTES EN MICROBIOLOGIE CLINIQUE 18, no. 04 (December 1, 2019): 10. http://dx.doi.org/10.54695/apmc.18.04.1522.
Wiedemann, Arnaud, Élise Jeannesson, Abderrahim Oussalah, Jean-Louis Guéant, Rosa-Maria Guéant-Rodriguez, and François Feillet. "Le dépistage de la phénylcétonurie en France." médecine/sciences 37, no. 5 (May 2021): 468–73. http://dx.doi.org/10.1051/medsci/2021061.
Loeber, J. Gerard, Dimitris Platis, Rolf H. Zetterström, and Peter J. C. I. Schielen. "Dépistage néonatal en Europe." médecine/sciences 37, no. 5 (May 2021): 441–56. http://dx.doi.org/10.1051/medsci/2021059.
Allemane, H., M. Prados-Ramirez, J. P. Croué, and B. Legube. "Recherche et identification des premiers sous-produits d'oxydation de l'isoproturon par le système ozone/peroxyde d'hydrogène." Revue des sciences de l'eau 8, no. 3 (April 12, 2005): 315–31. http://dx.doi.org/10.7202/705226ar.
El Azzaoui, B., J. Fifani, E. M. Tjiou, E. M. Essassi, J. Jaud, L. Lopez, and J. Bellan. "Synthèse et mise en évidence par spectrométrie de masse (FAB) des propriétés complexantes du 2-(5-méthyl-1-pyridin-2-yl-pyrazol-3-yl)méthyl benzimidazole et d'une réaction d'oxydation par l'oxygène moléculaire." Tetrahedron Letters 40, no. 25 (June 1999): 4677–80. http://dx.doi.org/10.1016/s0040-4039(99)00871-0.
Ravaonindrina, Noro, Iony Razanajatovo, and Alexandra Bastaraud. "Qualité microbiologique de la viande commercialisée dans la communauté urbaine d’Antananarivo." Revue d’élevage et de médecine vétérinaire des pays tropicaux 67, no. 3 (June 30, 2015): 122. http://dx.doi.org/10.19182/remvt.10178.
Dissertations / Theses on the topic "Spectrométrie de masse à faisceau moléculaire":
Crunelle, Benoît. "Étude de flammes basse pression de méthane et d'éthane par couplage faisceau moléculaire : spectrométrie de masse avec ionisation par impact électronique ou multiphotonique et par modélisation." Lille 1, 1995. http://www.theses.fr/1995LIL10163.
Aubry, Olivier. "Étude des précurseurs gazeux de couches minces en carbone déposées à partir de phases gazeuses activées thermiquement et par plasma." Phd thesis, Université d'Orléans, 2002. http://tel.archives-ouvertes.fr/tel-00011968.
Bordel, Damien. "Développement de nouveaux substrats compliants pour l'hétérroepitaxie de semiconducteurs." Ecully, Ecole centrale de Lyon, 2007. http://www.theses.fr/2007ECDL0045.
This work showed how employed a viscous or elastic material in order to make a pseudosubstrate. This allowed to epitaxy new semiconductors that couldn't be obtain without defaults on the standart substrate. We explained the double bonding technic in order to obtain pseudosubstrates. A puedomorphic layer of InGasAs/InAsP/InGaAs strained in compressive was epi-grown onto substrate. This was bonded onto a thick PDMS substrate by hydrophobic-hydrphilic bonding. The PDMS thanks to its great elsticity allowed the relaxation of the epilayer strain. Like the epi-grown of III-V semiconductors was dont to incompatible temperature with the PDMS stability a second bonding on host sunstrate was used. The InGaAs epilayer photolumijnescnce spectrum showed the optoelectronic quality of the re-epitaxy. Others materials were also explored. Once used a self assembled molecular layer in place of PDMS. This layer was used both like adhesif and compliant layer. The second material was a glass, the borophosphosilicate glass (BPSG) that was compatible with III-V semiconductors epi-grown. This allowed to free from double bonding. This study showed the importance of both bonding interface, who permit to divide the strain up between the thin layer and the substrate, and the different thick between the epi-grown layer and the thick compliant layer
Abd, El Rahim Mohamad. "Déflexion électrique d'un jet moléculaire : progrès expérimentaux et théoriques." Phd thesis, Université Claude Bernard - Lyon I, 2005. http://tel.archives-ouvertes.fr/tel-00011199.
Dmitriev, Artëm. "Kinetic study of ester biofuels in flames." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0238.
Global progress all over the world requires a variety of clean energy sources. Liquid ester-based biofuels seem to be very effective in this context since they are easy to use in modern vehicles, they can be produced from a variety of renewable resources, and they provide environmentally friendly combustion characteristics. In this regard, fatty acid ethyl esters (FAEEs) are considered as a promising class of biofuels. The main goal of this thesis was to develop an updated chemical kinetic mechanism of combustion of light FAEEs up to ethyl pentanoate and validate it against the new experimental data on chemical speciation in low and atmospheric pressure premixed laminar flames. The flames fueled by three FAEEs, ethyl acetate, ethyl butanoate and ethyl pentanoate, were investigated by means of molecular-beam mass-spectrometry and gas-chromatography. More than 40 stable and intermediate species including radicals were detected and quantified in the flames. A comprehensive analysis of the developed mechanism was performed. The thesis consists of 3 chapters. In the first chapter a review of literature is presented. The most important experimental and theoretic studies on FAEEs are discussed. The second chapter presents an overview of experimental and simulation methods used in the work. Details on the mechanism development are also provided in this part. The last chapter present experimental and modeling results on the esters studied in comparison with the literature kinetic mechanisms
Debois, Delphine. "Imagerie moléculaire d'échantillons biologiques par spectrométrie de masse ToF-SIMS." Thesis, Evry-Val d'Essonne, 2008. http://www.theses.fr/2008EVRY0014/document.
My PhD’s work has been devoted to the development of the emergent technique ToF-SIMS imaging. The first part of my work was dedicated to fondamental aspects with the use of a fullerene ion source as a primary ion beam or sputtering ion beam. We expected to realize 3D imaging. The second part of my work consisted to applications of the mass spectrometry imaging. Several application fields were studied, as archeology as with the analysis of patina of the Dogon statuary or chinese mummy hair. A third project was dedicated to the in situ biomarker research from human liver biopsies. The goal of this study was to identify a potential lipid biomarker of the non-alcoholic fatty liver disease. The last part of this manuscript is devoted to the in situ qualitative and quantitative analysis of surfactins (a family of heptacyclodepsipeptides) on a Bacillus subtilis swarming community. We combined ToF-SIMS imaging for qualitative analysis and localization of surfactins within the swarming pattern and MALDI-TOF mass spectrometry for the quantification of these species. The results ot this PhD’s work show that ToF-SIMS imaging could be applied to various fields of research as archeology, microbiology and medicine
Wolters, Cédric. "Caractérisation moléculaire d’échantillons organiques complexes par spectrométrie de masse et chromatographie en phase liquide." Thesis, Université Grenoble Alpes, 2021. http://www.theses.fr/2021GRALU009.
How to analyse a complex organic sample? This general question seems simple at first glance but requires a closer look at the notion of complexity to be able to understand and justify the means used to characterise it. In planetology, and more widely in astrophysics, all the observations and observables indicate that the matter that makes up extraterrestrial objects is composed of a mixture of various molecules, and this mixture is more or less diverse and dense depending on the object. Observations and models are routinely done to try to understand these objects and to constrain their evolutionary processes, or to try to investigate their origin.Characterising the molecular complexity of such objects requires state-of-the-art instruments, which are difficult to adapt to space industry constraints in order to be placed on a probe, and this requires that the object under study can be sampled. However, most objects of interest cannot be reached in a reasonable time. Therefore, another way to study these objects is needed: laboratory astrophysics. Many experiments attempt to simulate the objects and environments in which they evolve and analyse the evolution of matter subjected to these constraints. Part of the challenges of these experiments lies in the chemical characterisation of the samples, and more particularly in their molecular characterisation.As part of this thesis, we proposed to use high-resolution mass spectrometry (HRMS) and high-performance liquid chromatography (HPLC) to characterise complex organic samples. To do so, the entire analytical chain was studied, from the data acquisition to its use. Thus, we proposed an optimisation of the data acquisition in Orbitrap, as well as the systematic processing of the data resulting from the analysis done by ESI-HRMS as well as for the analysis done by LDI-ICR. Chromatography coupled with mass spectrometry is a powerful tool for accessing the molecular structure of samples and requires developing methods that are suited to the samples analysed. Therefore we offered two HPLC methods for sample analysis, which have been developed and validated for the analysis of complex samples. However, no currently available commercial software allowed for the unsupervised analysis of such samples. Software to allow the processing of this data has now been developed and allows the molecular diversity of samples to be revealed without supervision. The identification of the detected molecules is not an easy process since it then requires having all the possible isomers for each molecule detected as standards for reference. To reduce the number of possibilities, a tool for predicting retention times was proposed. This was based on knowledge of the physico-chemical properties of known compounds to predict their theoretical retention time on the methods used.Lastly, this work presents the application of all the developments carried out during these three years on a set of samples of synthetic atmospheric aerosol analogues modelling exoplanets of the super-Earth and mini-Neptunes type. From the analysis of their soluble matter to the comparison between soluble, insoluble, and total phase, analysis by mass spectrometry indicates a great diversity and important differences between samples. This indicates processes of formation and evolution related to the composition of the reactive mixture. Finally, chromatographic analysis of one of these samples indicates multiple isomers, some of which may be labelled as biological molecules, potentially involved in the process of the origin of life
Lianos, Leonardos. "Application du SIMS TOF à l'étude moléculaire et structurale de surfaces de polymères." Lyon 1, 1994. http://www.theses.fr/1994LYO10116.
Kamalou, Omar. "Faisceau d’agrégats chargés sélectionnés en taille : réalisation et premières expériences." Caen, 2007. http://www.theses.fr/2007CAEN2011.
The main objective of this work concerns the production of beams of mass-selected clusters of metallic and semiconductor materials. Clusters are produced in a magnetron sputtering source combined with a gas aggregation chamber, cooled by liquid nitrogen circulation. Downstream of the cluster source, a Wiley-McLaren time-of-flight setup allows to select a given cluster size or a narrow size range. The pulsed mass-selected cluster ion beam is separated from the continuous neutral one by an electrostatic 90°-quadrupole deflector. After the deflector, the density of the pulsed beam amounts to about 103 particles/cm3. Preliminary deposition experiments of mass-selected copper clusters with a deposition energy of about 0. 5 eV/atom have been performed on highly oriented pyrolytic graphite (HOPG) substrates, indicating that copper clusters are evidently mobile on the HOPG-surface until they reach cleavage steps, dislocation lines or other surface defects. In order to lower the cluster mobility on the HOPG-surface, we have first irradiated HOPG samples with slow highly charged ions (high dose) in order to create superficial defects. In a second step we have deposited mass-selected copper clusters on these pre-irradiated samples. The first analysis by AFM techniques showed that the copper clusters are trapped, on the defects produced by the highly charged ions
Madec, Edwige. "Analyse moléculaire d'une protéine-kinase, PrkC, et d'une phosphatase, PrpC, impliquées dans deux processus de développement chez Bacillus subtilis." Paris 11, 2002. http://www.theses.fr/2002PA112283.
Protein phosphorylation on Ser/Thr/Tyr residues plays a vital role in many cellular processes. My studies in this Thesis concerned the characterization, for the first time of PrkC, a membrane linked protein kinase in Bacillus subtilis, belonging to the super-family of Hanks kinases, predominantly found in eukaryotes. PrkC was shown to be an integral membrane protein with the topology of some receptor kinases found in humans, with an external domain presumed sensor, a single transmembrane domain (TMD) and a highly conserved kinase domain. I have shown that PrkC forms dimers with both the extracellular domain and the TMD capable of promoting dimerization. In the presence of ATP, PrkC or its catalytic domain, PrkCc, autophosphorylates in vitro and phosphorylates MBP. In both cases, phosphorylation involves one or more Thr residues. In collaboration with Ole Jensen (Danemark), we were able to identify precisely eight phosphorylated residues in PrkC by mass spectrometry. These residues were localised to specific regions of a 3D structure of PrkCc modelled on known kinase structures. Four Thr were localised to the activation loop whereas three Thr are in the juxtamembrane region, and one Ser in a non conserved region. Site directed mutagenesis of these residues confirmed that autophosphorylation of Ser214 and the threonine residues in the activation loop is essential for kinase activity. In a complementary approach, PrpC, a protein phosphatase homologue of the human PP2C family was also characterized. The autophosphorylated form of PrkC was dephosphorylated by PrpC. PrkC and PrpC are encoded by adjacent genes which are co-transcribed. These results indicate that these enzymes form a functional protein kinase/phosphatase couple. Moreover, other studies showed that mutants deleted for prkC or prpC displayed reduced biofilm formation and sporulation frequencies. A better understanding of the role of PrkC and PrpC in the cell requires identification of targets/partners
Books on the topic "Spectrométrie de masse à faisceau moléculaire":
Creighton, Thomas E. The physical and chemical basis of molecular biology. [U.K.?]: Helvetian Press, 2010.