Academic literature on the topic 'Préparation échantillon'
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Journal articles on the topic "Préparation échantillon"
Tremblay, Jean-François, and Jean-Guy Bergeron. "Que font les employeurs comme préparation à la négociation collective ?" Articles 64, no. 1 (March 30, 2009): 134–53. http://dx.doi.org/10.7202/029542ar.
Full textInwood, Kris, and Kevin James. "Une ressource numérique pour l’analyse historique : le recensement canadien de 1891." Notes de recherche 34, no. 2 (November 22, 2006): 315–28. http://dx.doi.org/10.7202/014014ar.
Full textBartiaux, Françoise, Lorise Moreau, and Luis A. Reátegui Salmón. "Présentation et évaluation de la préparation d’une enquête par téléphone en Belgique." Cahiers québécois de démographie 39, no. 1 (December 3, 2010): 145–68. http://dx.doi.org/10.7202/045059ar.
Full textBouhon, Mathieu. "Logiques didactiques et problématisation des contenus dans l’activité de préparation de séquences des enseignants d’histoire." Nouveaux cahiers de la recherche en éducation 15, no. 1 (January 4, 2013): 69–86. http://dx.doi.org/10.7202/1013380ar.
Full textDupont, Jean-Blaise, Jean-François Ballif, and Claire Jobin. "Rôle et fonction des intérêts dans la définition du projet professionnel." L’Orientation scolaire et professionnelle 16, no. 3 (1987): 207–29. http://dx.doi.org/10.3406/binop.1987.1635.
Full textMose, Evelyne Kwamboka, Peter JO Aloka, and Benard Mwebi. "Goal Orientation and Learning Readiness: Evidence Among Freshmen in Selected Kenyan Universities." Alberta Journal of Educational Research 68, no. 1 (March 10, 2022): 89–102. http://dx.doi.org/10.55016/ojs/ajer.v68i1.70594.
Full textBastianelli, Denis, and Laurent Bonnal. "Evaluation de la qualité des produits du canard gras." Revue d’élevage et de médecine vétérinaire des pays tropicaux 67, no. 3 (June 27, 2015): 135. http://dx.doi.org/10.19182/remvt.10176.
Full textLacroix, Christian, Élodie Saussereau, and Jean-Pierre Goullé. "Préparation en ligne des échantillons." Annales de Toxicologie Analytique 22, no. 2 (2010): 89–96. http://dx.doi.org/10.1051/ata/2010015.
Full textEady, Allison, Bianca Dreyer, Brandon Hey, Manuel Riemer, and Anne Wilson. "Réduire les risques de chaleur extrême pour les personnes âgées : communiquer les risques et renforcer la résilience." Promotion de la santé et prévention des maladies chroniques au Canada 40, no. 7/8 (July 2020): 239–50. http://dx.doi.org/10.24095/hpcdp.40.7/8.01f.
Full textLaouali, Abdou, Moussa Mamoudou Boubacar, Baggnian Issoufou, and Mahamane Ali. "Diversité et usages des plantes médicinales à l’ouest du Niger." Journal of Animal & Plant Sciences 46, no. 1 (November 30, 2020): 8164–74. http://dx.doi.org/10.35759/janmplsci.v46-2.1.
Full textDissertations / Theses on the topic "Préparation échantillon"
Pommies, Lilas. "Intégration de la préparation des échantillons dans une analyse par spectrométrie de masse et PCR isotherme." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASQ001.
Full textBioanalysis is the identification and the quantification of biological molecules or active biological agent in a sample. It is divided into several stages: sample collection and sending to the laboratory; sample preparation to make it compatible with the analysis method; analysis and, finally, measurement of the events occurring during the analysis.During this thesis, two analysis were studied: mass spectrometry, more specifically MALDI-TOF and an isothermal PCR called Loop-mediated isothermal amplification (LAMP).The main aim was to make these methods compatible with field use. To achieve this, the SPID, a device patented by CEA, was adapted to both technologies. This device enables a bacterial suspension to be filtered, concentrated, extracted and detected by lateral flow immunoassay. The SPID is a tool that eliminate the need for centrifugation or washing, methods traditionally used to prepare sample for MALDI and LAMP.To analyze ribosomal proteins by MALDI-TOF, an extraction buffer compatible with this technic had to be developed. Indeed, to facilitate bacterial lysis, the use of detergents is often recommended but detergents can prevent the identification of bacteria by mass spectrometry. The results were compared with a reference protocol proposed by Bruker. Using SPID, three bacterial species were identified at a concentration of 107 CFU/mL in a simple medium and in urine. In contrast, the reference protocol identified the same species at a concentration of 106 CFU/mL.To make heating step compatible with filed use, an autonomous heating station was designed during the thesis. This station heats the SPID tank for 40 minutes at 65°C. It could be battery-powered.The amplification products, called amplicons, are detected by lateral flow immunoassay. Amplicons are end-labeled using two pirmers. One primer is labeled with digoxygenin, the other with biotin. The amplicon is captured by an anti-digoxigenin antibody, immobilized on a nitrocellulose membrane; and revealed using streptavidin coupled to gold nanoparticles.With the optimizations made during the thesis, the complete LAMP field protocol takes less than an hour : from de sample preparation to the detection
Bisceglia, Émilie. "Méthodes physiques d’extraction de micro-organismes à partir d’échantillons sanguins à l'aide de microsystèmes." Thesis, Cachan, Ecole normale supérieure, 2013. http://www.theses.fr/2013DENS0042/document.
Full textExtraction of pathogens from a biological sample is a key step for efficient diagnostic tests of infectious diseases. For bloodstream infections, current diagnostic methods are usually based on bacterial growth and take several days to provide valuable information. An accelerated result would have a high medical value to adjust therapeutic strategies. The aim of this study is to design a new approach for separation and concentration of microorganisms directly from a blood sample, to avoid time-consuming growth stages. We report a method based on two different microsystems connected in series: it combines modification of conductivity and osmolarity of the sample with generic capture of microorganisms by dielectrophoresis. First we explore the impact of conductivity and osmolarity on the dielectric properties of blood cells and microorganisms. Dilution and acoustic forces are both analyzed to transfer blood cells and microorganisms to the optimized buffer. Then we demonstrate the feasibility of achieving the dielectrophoretic separation of microorganisms from blood cells in a low conductivity and low osmolarity medium inside a fluidic device. The structure of the device is optimized with numerical simulations and experiments performed on blood samples and various microorganisms (E. coli, S. epidermidis and C. albicans).The generic capture of microorganisms is validated, and we achieved a separation of 97% efficiency with E. coli, with an optimal inlet velocity around 100-200 µm.s-1. Finally, we propose an improved microsystem to perform the sample preparation step on a larger volume (1-10mL) in a few hours, in order to fit the medical need
Bisceglia, Émilie. "Méthodes physiques d'extraction de micro-organismes à partir d'échantillons sanguins à l'aide de microsystèmes." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2013. http://tel.archives-ouvertes.fr/tel-00957785.
Full textGouache, Thibault. "Forage alternatif dual de régolithe extra-terrestre : évolution d'une solution bio-inspirée." Toulouse, ISAE, 2011. http://www.theses.fr/2011ESAE0011.
Full textWuchner, Klaus. "Préparation et analyse de micropolluants organiques dans des échantillons environnementaux (extraction par fluide supercritique ; préconcentration et analyse en ligne HPLC)." Toulouse, INPT, 1994. http://www.theses.fr/1994INPT069G.
Full textDérue, Cédric. "Microscopie SIMS d'espèces diffusibles chez les végétaux : Mise au point d'une nouvelle méthode de préparation des échantillons et d'observation d'échantillons congelés hydratés." Rouen, 2005. http://www.theses.fr/2005ROUES031.
Full textThis work is a new contribution to the preparation of biological samples to study the distribution of diffusible ions using SIMS microscopy (Secondary Ion Mass Spectrometry). We compare the capabilities of the SIMS technique for imaging the inorganic cations with those of the others analytical imaging techniques. The main part of the work was to develop a new method for the dynamic SIMS analysis of frozen-hydrated samples under Fast Atom Bombardment (neutral oxygen). We describe the new cold stage built especially for our IMS 4F SIMS analyser. We show that referencing to the ice characteristic ions in the measurement of the relative sensitivity factors of Na, K, Mg and Ca cations gave non reliable results whatever the freezing mode (Plunge Freezing or High Pressure Freezing). Sensitivity factors relative to K gave, in contrast, results of reasonable accuracy. We show images of the cations distributions obtained with frozen-hydrated samples of ivy camomile and flax. We measured the inorganic ions ratios in the vacuoles of the cells of flax hypocotyl. These measurements revealed a high diversity in ionic contains of vacuoles even of adjacent cells. We also describe a new sample preparation method of plant samples without contact with a liquid to prevent the loss of diffusible species (“vapour phase method”). We used this method to appraise the SIMS applicability to boron studies in plants. We show that the SIMS technique has the potential for the simultaneous quantitative detection of the 10B and 11B isotopes in plant cells
Pariot, Christine. "Implication des ions inorganiques dans la différenciation des fibres chez le lin : approche par microscopie ionique analytique." Rouen, 1994. http://www.theses.fr/1994ROUES021.
Full textGueye-Follet, Marie-Laure. "Relations ioniques dans l'activité cambiale et la xylogénèse : approche par microscopie ionique analytique." Rouen, 1997. http://www.theses.fr/1997ROUES050.
Full textFouet, Marc. "Microfluidique 3D et actionneurs magnétiques : de leur intégration à la préparation d'échantillons biologiques." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30036/document.
Full textMicrofluidic chips are key elements for solutions and biological samples handling and analysis. They are enablers for micro-scale studies and are the cornerstone of lab on chips, at the cutting edge of medical diagnostics. The aim of this thesis work was to explore functional possibilities offered by 3D microfluidic architectures for the development of diagnostic tools relying on cell sorting, tagging and handling. These functions were investigated on monocytes sub-populations, which are markers for many inflammatory diseases. In order to cover a consistent series of necessary steps for complex biological samples pretreatment, three additional functions were studied: size sorting with hydrodynamic filtration, immuno-isolation by magnetic separation, and on-chip tagging with magnetic microparticles. To perform tagging reactions, a micromixer based on diffusion and flow split and recombination (baker's transform) was fabricated and characterized. Analytical (diffusion) and numerical (diffusion-advection) models are showed, together with test experiments on the devices for mixing reactions of fluorescein/water and cells/microbeads. New approaches of hydrodynamic filtration based size sorting were investigated by devising 3D bypass structures, that allow developing a mixing strategy (tagging reactions) suited to cells and particles. An analytical model for flows and sorting efficiency is introduced and compared to the devices characterization. Furthermore, it was shown that this approach also enables sorting of sub-micron particles (like blood microparticles). All 3D microfluidic systems were obtained thanks to an original dry film photoresist stacking (lamination) technique, dramatically reducing micro-fabrication time, even though compatible with standard process. This fabrication technique also enables magnetic micro-sources integration in lab on chips by realizing planar micro-coils underneath microfluidic channels. By coupling the effects of integrated micro-coils to the fields generated by external magnets, we brought the proof of concept of systems dedicated to trapping, focusing and separating (in flow) magnetic microbeads. Models (magnetic fields and forces) are described along with devices characterization. Conception of specific instrumentation (current source) for micro-coils actuation is also shown, as it allows time and intensity control over applied magnetic fields
Wu, Chang. "Dispositif microfluidique utilisant la technologie d’électromouillage sur isolant dédié à la préparation d’échantillons pour des analyses biologiques : application au suivi en ligne de bioprocédés." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10173/document.
Full textThis work presents the concept, fabrication technology and characterization of a sample preparation unit using an original approach coupling channel-based continuous and electrowetting-on-dielectric (EWOD)-based digital microfluidics. The major advantage of ‘digital’ is the accurate control of multiple reagents without the need of a complex network of microvalves, while unprocessed and reprocessed ‘continuous’ format is ideal for coupling with upstream and downstream microfluidic devices. We have developed two generations. In our first work, a three layers PSP (Pyrex-Silicon-Pyrex) configuration with hydrophobic liquid-solid interfaces was employed. An original adhesive wafer bonding technique has been optimized that is sufficiently generic to be used in diverse MEMS processes. However, the preliminary characterization results have shown that most real samples used in bioprocessing could not be handled by this first prototype. To address this issue, we have developed a bilayer PS (Pyrex-Silicon) configuration with superhydrophobic liquid-solid interfaces made by chemical nanotexturation of silicon. Thanks to the low contact angle hysteresis of this superhydrophobic surface, the friction resistance and bio-adsorption on the surface were largely reduced allowing transport of real complex liquids. Finally, this prototype has been successfully used for preconditioning samples taken from a yeast bio-reactor and then delivered to analytical modules either an enzyme-linked immunosorbent assay (ELISA) or a capillary electrophoresis (CE) device coupled with a mass spectrometry (MS)
Books on the topic "Préparation échantillon"
Fish, Lyn. La préparation des échantillons d'herbier. Meise: National Botanic Garden (Belgium), 2004.
Find full textBook chapters on the topic "Préparation échantillon"
"Chapitre 2. Préparation des échantillons." In Introduction à la cristallographie biologique, 43–56. EDP Sciences, 2021. http://dx.doi.org/10.1051/978-2-7598-2550-9.c008.
Full textBAUDIN, François, Yves BENOIT, and Nicolas BOUTON. "Conseils d’échantillonnage, effets de matrice minérale et artéfacts sur les thermogrammes." In La méthode Rock-Eval®, 45–71. ISTE Group, 2024. http://dx.doi.org/10.51926/iste.9153.ch4.
Full text"3 Prélèvement et préparation des échantillons." In Précis de radiochimie et analyse de radionucléides, 59–76. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2408-3-004.
Full text"3 Prélèvement et préparation des échantillons." In Précis de radiochimie et analyse de radionucléides, 59–76. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2408-3.c004.
Full text"4 Préparation et traitement des échantillons avant analyse." In La validation de méthode en spectrométrie d'émission optique à source plasma, 83–102. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2083-2-008.
Full text"4 Préparation et traitement des échantillons avant analyse." In La validation de méthode en spectrométrie d'émission optique à source plasma, 83–102. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2083-2.c008.
Full text"Chapitre 5 Préparation des sources étalons et des échantillons." In Mesure du rayonnement Bêta, 69–76. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2308-6-007.
Full text"Chapitre 5 Préparation des sources étalons et des échantillons." In Mesure du rayonnement Bêta, 69–76. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2308-6.c007.
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