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Academic literature on the topic 'Dispositifs microfluidiques'
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Journal articles on the topic "Dispositifs microfluidiques"
Nguyen, Chi Thanh, and Isabelle Ledoux-Rak. "Micro-résonateurs en anneau pour la détection et l’identification de polluants." Photoniques, no. 106 (January 2021): 34–38. http://dx.doi.org/10.1051/photon/202110634.
Full textDissertations / Theses on the topic "Dispositifs microfluidiques"
Gomez, Quiñones José Isabel. "Conception et Implémentation d'un Stimulateur Multi-Canal pour les Dispositifs Microfluidiques." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00662414.
Full textGomez, quinones Jose. "Conception et Implémentation d'un Stimulateur Multi-Canal pour les Dispositifs Microfluidiques." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00716927.
Full textGropplero, di Troppenburg Giacomo. "Dispositifs microfluidiques dans les mousses polymères : fabrication, modélisation et applications biologiques." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI060.
Full textMicrofluidics and an appropriate substrate are essentials for the design of low-cost point-of-care diagnostic devices. The particular mechanical and structural properties (porosity, elasticitydots) of polymeric foam are unique among the other widespread materials in microfluidics (PDMS, paper, plastic materials, glass, silicondots). A systematic screening of the different capabilities provided by polymeric foam as a new substrate for microfluidics is offered in this thesis. First off, a shaping process is proposed for the production of fluidic microsystems. This new process relies on the combined usage of a polymeric foam and an elastomer to produce highly elastic fluidic systems that keep the initial structural properties of the foam. Based on a controlled and repeatable embossing technic, the process is compatible with industrial production. A coupled numerical model also allows its optimization. The resulting foam microfluidic devices have, besides capillarity, a decisive asset : the option of a manual compression or an external peristaltic actuation for a contamination-free control of the microfluidic flows. The peristaltic actuation can function as a pump and as a valve. A lumped elements model enables a dynamic reproduction of the fluidic behavior inside the foam channels. To ensure proper integration in low-cost portable devices, the fundamental stages of a diagnostic test (retrieval and preparation of a sample, detection) are validated. We show that filtration of objects of only a few tens of micrometers in size is possible. The foam devices can also be chemically functionalized to optimise the capture of specific biological targets. The fluorescent or colorimetric detection of biological elements is equally possible by means of isothermal DNA amplification. Finally, a blood typing prototype gives access to the blood group of a whole blood sample in a few minutes. This last test is carried on an integrated device which highlights the main benefits of a foam device : robustness, user-friendly, embedded reagents, multiple materials combination, transport of a biological sample by external compression controlled by an operator, direct readout of a result in a few minutes
Wang, Li. "Régulation de microenvironnement cellulaire par dispositifs microfluidiques et microstructuration de substrats." Paris 6, 2011. http://www.theses.fr/2011PA066189.
Full textVelve-Casquillas, Guilhem. "Contrôle de température et étude des transferts thermiques dans des dispositifs microfluidiques." Phd thesis, Université Paris Sud - Paris XI, 2008. http://tel.archives-ouvertes.fr/tel-00391813.
Full textVelve, Casquillas Guilhem. "Contrôle de température et étude des transferts thermiques dans des dispositifs microfluidiques." Paris 11, 2008. http://www.theses.fr/2008PA112246.
Full textThe purpose of this work is to study microfluidic devices with integrated thermal elements for process temperature monitoring and controlling. The ability of multiple parameters controlling, the small time-constant of micro-scale heat transfer, and the possibility of large scale device integration allow us to propose new tools for other advanced research purposes. In physics, we fabricated micro-conductimeters as tool to study thermal conductivity of nanofluids. In chemistry, we developed a flow-in micro-calorimeter which is compatible to the common lab-on-chip technologies. The possibility given by the high speed of heat transfer in microfluidic device led to the development of new tools for cell biology. In particular, we have being able to confine a colony of yeast cell and change the working temperature in a few seconds. It allowed us to control thermo sensitive protein activity and studying cytoskeleton properties of S. Pombe yeast. The devices and methods we proposed are therefore pertinent, providing new tools for cell biology studies and allowing in particularly a better understanding of the role of thermo sensitive proteins
Morel, Mathieu. "Développement de dispositifs microfluidiques pour l'étude du guidage axonal en molécules uniques." Paris 6, 2010. http://www.theses.fr/2010PA066753.
Full textNi, Xiaofang. "Culture et différenciation cellulaire sur des substrats structurés et dans des dispositifs microfluidiques." Paris 6, 2009. http://www.theses.fr/2009PA066666.
Full textAzzopardi, Charles-Louis. "Dispositifs microfluidiques pour l’injection de fluides à travers un réseau de gouttes : application biocapteur." Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCD020/document.
Full textSince two decades the research on microfluidics systems allowed creating devices for biological detection with regular improvement in compactness, functionality integration and quantity of biological sample, leading to the concept of lab-on-chip. This approach has resulted in dramatic changes in the biomedical field, for example, opening the possibility to perform genomic analysis or improving the medical analysis cost. Using droplet as reaction chamber is a recent evolution that leads to a decrease in biological sample volume and an increase in analysis speed by multiplexing.Our team develops acoustical sensors dedicated to detect biomarker of interest in liquids. The principal weakness of theses sensors lies in their need for replacement of the biodetection interface for performing a new measurement. Accordingly, they use a detection chamber partially or totally disposable. However, few research works showed reusability of sensor by regenerating the bioreceptor layer on the detection interface by chemical treatment.We are proposing to avoid the replacement or the chemical treatment of the detection interface that requires dismounting the device between measurements. We are using here droplets, not as reaction chambers but as movable detection interface. They can be generated and configured directly inside the device to detect a specific biomarker. Then, droplets can be easily evacuated and replaced through the device, which allows to chain measurement of various configurations without dismounting it.The research work conducted in this thesis focuses on the fluidic aspects of this innovative sensor. They show development, including realization and characterization, of theses microfluidic devices and its dedicated characterization setup. This project is followed by two ancillary works about development of microfluidic devices for acoustical sensors and droplets systems. The first one is aiming at the homogenization of the flow velocity inside a reaction chamber. The second one is exploiting property of droplet generation for the realization of a variable capacitance capacitor
Dhouib, Kaouthar. "Mise au point de dispositifs microfluidiques pour la cristallisation et l'analyse cristallographique des biomolécules." Strasbourg, 2009. http://www.theses.fr/2009STRA6132.
Full textMicrogravity, capillary tubes and hydrogels provide convection-free environments in which crystal growth and crystal quality required for structural biology can be significantly improved with regard to free solutions. Convection is also absent inside the nano-volumes of solutions contained in the micro- channels or -chambers of microfluidic systems. Besides being a means to miniaturize crystallization assays, the later also give access to high-throughput screening and crystal production under nearly ideal growth conditions. Microfluidics has innumerable potential applications in biotechnology and biomedical analysis. Here microfluidic chips were developped for the crystallization of biological macromolecules by counter-diffusion for crystallographic analyses. The prime criteria were versatility, low cost and user friendly handling. These devices enable crystal growers to search for initial crystallization conditions, optimize them and perform x-ray diffraction directly in situ. Practical aspects concerning the choice of the chip materials and the crystallization method are discussed
Books on the topic "Dispositifs microfluidiques"
Narayanan, Sundararajan, ed. Microfabrication for microfluidics. Boston: Artech House, 2010.
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