Добірка наукової літератури з теми "Méthode microfluidique"
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Статті в журналах з теми "Méthode microfluidique":
Vabre, Alexandre, Samuel Legoupil, Erwan Manach, Olivier Gal, Stéphane Colin, Sandrine Geoffroy, and Anne-Marie Gué. "Evaluation d’une méthode d’imagerie X en microfluidique : cas du remplissage de microcanaux en forme de « T »." La Houille Blanche, no. 5 (October 2006): 33–39. http://dx.doi.org/10.1051/lhb:2006082.
Dembele, Mahamadou, Marion Delafosse, Nadhir Yousfi, Hanna Debiec, Kieu Ngo, Emmanuelle Plaisier, Pierre Ronco, and Guillaume Perry. "Modélisation de la barrière de filtration glomérulaire." médecine/sciences 37, no. 3 (March 2021): 242–48. http://dx.doi.org/10.1051/medsci/2021010.
Zhu, Junye, Dongfang Sun, Limei Shen, Bin Jiang, Cai Gao, Pei Zhou, Jingchun Tang, and Xunfen Liu. "A method to establish a linear temperature gradient in a microfluidic device based on a single multi-structure thermoelectric cooler{fr}Une méthode pour établir un gradient de température linéaire dans un dispositif microfluidique basé sur un seul refroidisseur thermoélectrique multi-structure." International Journal of Refrigeration, November 2023. http://dx.doi.org/10.1016/j.ijrefrig.2023.11.008.
Дисертації з теми "Méthode microfluidique":
Guglielmino, Maud. "Développement d'une nouvelle méthode analytique du formaldéhyde dans l'air basée sur un dispositif microfluidique." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF048.
Formaldehyde (HCHO) is a major pollutant in indoor air. The objective of this work is to realize the scientific and technological advances required to obtain an analytical method based on a microfluidic device to measure air formaldehyde combining precision, selectivity, analysis speed with for major objective a sufficient autonomy on a long time, typically one month. The principle of the method was initially based on three key steps, the gaseous formaldehyde uptake in solution, the formaldehyde derivatization reaction, then the detection of reaction product by colorimetry or fluorimetry. The method has finally advanced toward only two definite steps thanks to the use of an innovative microfluidic device in which uptake and reaction take place simultaneously. The study of analytical performances of the device allows to validate the method developedduring this work
Zhang, Cheng. "Développement d'une méthode microfluidique pour la préparation de microparticules mimes de globules rouges avec une taille et des propriétés mécaniques contrôlables." Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0045.
This thesis focuses on a droplet-based microfluidic method without the addition of surfactants to prepare RBC-like microparticles. The microparticles are obtained by ionic gelation of a natural polymer, sodium alginate (Na-alginate), with calcium chloride to form a gel of calcium alginate (Ca-alginate). Gelation is studied in situ in the microfluidic system or ex situ after the collection of Na-alginate microparticles. The size, the structure and the alginate concentration of the final microparticles are studied according to the operating parameters of the microfluidic system. The microfluidic method developed throughout this thesis allows to control the size and mechanical properties of Ca-alginate microparticles while avoiding their coalescence, despite the absence of surfactants. Thus, monodispersed Ca-alginate microparticles with a Young’s modulus close to that of RBCs are obtained and the feasibility of their use for ultrasonic measurements is also shown. In addition, alternative methods explored in parallel are presented at the end of the thesis
Prigent, Guillaume. "Modélisation et simulation numérique d'écoulements diphasiques pour la microfluidique." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-01059794.
Lac, Etienne. "Déformation et convection d'une capsule dans un écoulement de Stokes tridimensionnel infini." Compiègne, 2003. http://www.theses.fr/2003COMP1461.
Bonometti, Thomas. "Développement d'une méthode de simulation d'écoulements à bulles et à gouttes." Toulouse, INPT, 2005. https://hal.science/tel-04582704.
This work deals with the development of an interface-capturing method aimed at computing three-dimensional incompressible two-phase flows that may involve high density and viscosity ratios and capillary effects. The applications we have in mind concerns chemical engineering as well as environmental problems. We use a front-capturing method to advance the interface but do not perform any explicit reconstruction. We show that the base version of this method results in a smearing of the fronts in regions where the flow undergoes a stray stretching. We propose an improved technique in which the local velocity field within the fronts is modified and the above problem is fixed. This algorithm allows the interfaces to deform properly while maintaining the numerical thickness of the transition region within three computational cells. A detailed study of several aspects of the dynamics of two- and three-phase flows, such as drops in microchannels or hydrodynamic interactions in a bubble swarm, is then performed in both axisymmetric and three-dimensional configurations. The results concerning microfluidics are compared with very recent experiments. Finally, a study of the dynamics of a bubbly suspension involving up to 27 bubbles allow us among other things to enlighten the influence of the bubbles Reynolds number on the velocity fluctuations induced in the liquid
Reyhanian, Mashhadi Mehrnaz. "Simulation numérique par la méthode Monte Carlo (DSMC) et modélisation analytique d'un mélange gazeux dans un micro canal." Paris 6, 2011. http://www.theses.fr/2011PA066396.
Ameur, Djilali. "Modélisation analytique et simulation numérique par la méthode de Monte-Carlo d'un écoulement de gaz dans des micro-canaux." Paris 6, 2008. http://www.theses.fr/2008PA066102.
Rua, Gonzalez Diego. "Synthèse de matériaux catalytiques de type oxydes mixtes pour la production de méthanol par la précipitation en flux continu en système microfluidique." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAF001.
Global warming is a concern for the current and future generations due to the increasing greenhouse gases (GHG) emissions to the atmosphere, mainly due to the dependence on fossil fuels. The use of alternative fuels such as sustainable methanol produced from renewable H2 and from CO2 would contribute to reduce the GHG emissions and the effects of climate change. The synthesis of methanol using CO2 rich feedstock is preferentially done by using a solid catalyst composed of CuO, ZnO and ZrO2. This type of catalyst can be produced by coprecipitation of the metal species using a microfluidic device, with advantages that have been demonstrated over catalysts synthesized by batch coprecipitation. In this work, different catalysts for the hydrogenation of CO2 to methanol were synthesized using the microfluidic technique under different conditions, in order to explore different synthesis parameters that could lead to the development of more active catalysts. The differences in the properties and activity between a catalyst synthesized by the microfluidic method and another synthesized by the batch method were investigated, followed by an exploration of the effects of the aging time and the coprecipitation temperature on the catalysts. Lastly, the effect of different compositions of catalysts on the properties and activity were determined, by investigating different CuO contents, the use of CeO2 as a catalyst promoter, and the use of In2O3 as a catalyst promoter and as active metal
Ayed, Ichraf. "Développement d’une méthode de préconcentration de phosphopeptides sur phase monolithique en puce." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112196/document.
Protein phosphorylation is a key regulator of cellular signaling pathways. It is involved in most cellular events and strictly controls biological processes such as proliferation, differentiation and gene expression. An abnormal phosphorylation can be observed in various diseases such as some cancers or neurodegenerative diseases. Therefore, these proteins are potential biomarkers for the development of diagnostic tools. However, phosphoproteins can be present at low abundance in biological samples and selective enrichment techniques have to be developed prior to the analysis process. One of the most common approaches is based on Immobilized metal affinity chromatography (IMAC). The goal of this work was to develop a microsystem which contains a porous polymer monolith (PPM) as a solid phase extraction for a selective preconcentration of phosphopeptides by IMAC. UV-polymerization and characterization (permeability, porosity and specific area) of a monolith based on ethylene glycol methacrylate phosphate in silica capillaries was first performed. Then, we tried to optimize the different IMAC steps (metal immobilization, sample loading, washing and elution). An efficient immobilization of zirconium on the phosphated PPM was demonstrated by EOF measurements in capillary and confirmed by retention of a model phosphopetide. We demonstrated that the phosphated monolith was also a strong cation exchanger of highly basic peptides. Protocols of loading and elution were also studied but need to be further optimized. Transposition of phosphopeptides enrichment by IMAC on a miniaturized system was then considered. We selected two microchip materials: PDMS is an attractive polymer for its low cost, its ease of microfabrication, its excellent working properties (biocompatibility, UV transparent with low autofluorescence) and many integration possibilities (enrichment, separation and detection) and glass microchip more common and having a good UV transparency. However, PDMS presents two major disadvantages: high absorption property, and oxygen permeability which quench free radical polymerization. Except a few attempts, this material has not been employed successfully as mould for monolith polymerization. To overcome these problems, we investigated several strategies for PDMS surface treatments such as plasma treatment and borosilicate coating. Finally, we demonstrated that our IMAC module performed well on glass microchip. This miniaturized module should be integrated in the future into a microsystem dedicated to the diagnosis of Alzheimer disease
Morthomas, Julien. "Intéractions hydrodynamiques entre colloïdess confinés le long d'une paroi." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13882/document.
Applying a steady electric field or a constant thermal gradient to a colloidal suspension induces a finite velocity of the dispersed particles. The motion of particles is not due to a net body force like in sedimentation but to interfacial forces acting on the electric double layer at their surface. These forces involve a surface flow, which, in turn, results in a velocity field of the surrounding fluid in 1/r³ in the opposite direction of the particle displacement, with r the distance from the centre of the particle. In this work we consider a somewhat different situation, where the suspension is confined to a semi-infinite half space. The particle, under the action of the applied field, is trapped against the solid interface. Still, the creep flow remains; more precisely the particle continues to pump the fluid in the opposite direction. As a consequence there arises a lateral flow along the solid surface towards the particle. Thus others particles inserting themselves in this flow undergo drag forces and form clusters. Particles aggregation has been observed in Electrophoresis deposition and more recently in Thermophoresis deposition for micron sized polystyrene beads in aqueous solution. The total velocity field takes a form significantly more complicated than in the above mentioned unbounded cases; it must satisfy boundary conditions both at the particle surface and at the confining wall. Using the perturbative method of reflections or Oseen method based on Fourier transform we resolve the Stokes equation and find an analytic solution for the drag flow along the interface in powers of the ratio e=a/h of particle radius and wall distance. The usual solution at the zero order induces poor approximation, when following corrections in e involves better results in agreement with experimental measurements of hydrodynamic pair potential between two particles along a wall