Academic literature on the topic 'Cellule de transfert d'hydrates'
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Journal articles on the topic "Cellule de transfert d'hydrates":
Langlois, M., M. Borel, O. Clovet, V. Justice, C. Spuccia, and M. Raux. "Cellule de coordination des flux sortants des réanimations en période de Covid-19." Annales françaises de médecine d’urgence 10, no. 4-5 (September 2020): 327–32. http://dx.doi.org/10.3166/afmu-2020-0259.
Taillandier, Daniel. "Contrôle des voies métaboliques par les enzymes E3 ligases : une opportunité de ciblage thérapeutique." Biologie Aujourd’hui 215, no. 1-2 (2021): 45–57. http://dx.doi.org/10.1051/jbio/2021006.
Bagnis, C., C. Chabannon, and P. Mannoni. "Transfert de gènes dans les cellules hématopoïétiques : obscur objet du désir de voir et de manipuler la vraie cellule souche ?" médecine/sciences 12, no. 1 (1996): 6060–3. http://dx.doi.org/10.4267/10608/604.
Dupuis, O., P. Gaucherand, and G. Mellier. "Organisation de la cellule des transferts périnatals et taux de transfert périnatal en 2003 et 2004 dans la région Rhône-Alpes." La Revue Sage-Femme 5, no. 6 (December 2006): 317–25. http://dx.doi.org/10.1016/s1637-4088(06)76068-0.
Dupuis, O., P. Gaucherand, G. Mellier, and G. Mellier. "Organisation de la cellule des transferts périnatals et taux de transfert périnatal en 2003 et 2004 dans la région Rhône-Alpes." Journal de Gynécologie Obstétrique et Biologie de la Reproduction 35, no. 7 (November 2006): 702–10. http://dx.doi.org/10.1016/s0368-2315(06)76467-5.
Coqueugniot, Hélène. "Une expérience de dépôt de brevet et de mise en place d’une cellule de transfert au sein d’une équipe de recherche en anthropologie." Mélanges de la Casa de Velázquez, no. 46-1 (April 15, 2016): 281–86. http://dx.doi.org/10.4000/mcv.7024.
VIGNON, X., Y. HEYMAN, P. CHAVATTE-PALMER, and J. P. RENARD. "Biotechnologies de la reproduction : le clonage des animaux d’élevage." INRAE Productions Animales 21, no. 1 (March 20, 2008): 33–44. http://dx.doi.org/10.20870/productions-animales.2008.21.1.3373.
Dupuis, O., A. Arsalane, C. Dupont, M. Janvier, N. Laurenceau, I. Louzas, M. Mikala, et al. "Évaluation de l'algorithme de prise en charge des appels pour menace d'accouchement prématuré utilisé par la cellule de transfert périnatal de la région Rhône-Alpes." Gynécologie Obstétrique & Fertilité 32, no. 4 (April 2004): 285–92. http://dx.doi.org/10.1016/j.gyobfe.2004.02.007.
Qiu, Yang, Soizic Lacampagne, Marie Mirabel, Martine Mietton-Peuchot, and Rémy Ghidossi. "Quantification et identification des phénomènes de transfert d’oxygène au-travers des barriques." IVES Technical Reviews, vine and wine, March 31, 2022. http://dx.doi.org/10.20870/ives-tr.2022.5449.
Sahli, Youcef, Bariza Zitouni, and Hocine Benmoussa. "Etude numérique tridimensionnelle de l'effet de la température d'entrée des gaz sur la production de chaleur dans une pile à combustible SOFC planaire." Journal of Renewable Energies 21, no. 2 (June 30, 2018). http://dx.doi.org/10.54966/jreen.v21i2.680.
Dissertations / Theses on the topic "Cellule de transfert d'hydrates":
Abdallah, Mohamad. "Caractérisation multi-échelles des hydrates de gaz formés en présence d'additifs anti-agglomérants." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0048.
In the context of oil production, the formation of gas hydrates can lead to the formation of deposits, the clogging of lines and the interruption of oil and/or gas production. Hydrate formation can therefore have a strong economic impact. To ensure production without the risk of production shutdown, different strategies are adopted. A common strategy involves the production outside the hydrate zone by injection of thermodynamic additives (THIs), for example. However, the displacement of hydrate stability conditions by THIs requires the injection of massive doses of additive with high environmental and economic costs. Another production strategy, in the hydrate zone, consists of injecting so-called low dose inhibitors (LDHI): kinetic inhibitors (KHIs) or anti-agglomerant additives (AAs). For deep offshore oil fields, only the injection of AAs is relevant. These additives do not block the formation of hydrates but prevent their agglomeration and disperse the crystals formed in the production fluids. The development of AAs and the validation of their applications on production fields require an in-depth investigation of their impacts on real production systems (dispersion of crystals in pipes, the size of crystals in the continuous phase, the transportability of slurries, etc…).êTo provide a better understanding of the impact of commercial AAs on the formation of hydrates, a multidisciplinary and multi-scale approach was adopted. The formation of natural gas hydrates was first carried out in the laboratory by reproducing oil production conditions with industrial systems under operational conditions with three different AAs. On the macroscopic scale, the slurries of crystals produced under stirring in the reactors highlight effects dependent on the AA used. They impact differently the kinetics of hydrate formation, the rate and speed of crystal growth as well as their state of dispersion. Without stirring, these AAs additives affect the morphology and control the growth of crystals and the phase in which they will grow. A hydrate transfer cell was then designed to sample of hydrate slurries formed in the reactors under conditions close to industrial reality (with stirring, high pressure, low temperature). The transferred hydrate slurries were then analyzed by X-ray microtomography using a method developed during this work. On the microscopic scale, the state of dispersion of the hydrate grains was assessed for all transferred samples and information was obtained on the size of the dispersed hydrate grains, their shape and their sedimentation in the organic phase. At the molecular scale, in-situ analyzes were carried out by Raman spectroscopy on methane hydrates formed in the presence of the three AA additives. These tests highlighted the distribution of hydrates in the organic phases (gas and condensate). Observations by optical microscopy reveal hydrate morphologies comparable to those obtained in the presence of AAs additives in the reactors
Rudnicka, Dominika. "Mécanismes de la replication et du transfert de cellule à cellule du VIH." Paris 7, 2009. http://www.theses.fr/2009PA077160.
T lymphocytes are the main target cells for active HIV-1 replication. The virus subverts the cellular machineries to ensure the most efficient infection of the host. I studied the process of HIV-1 replication and intercellular spread in T cells. I visualized the simultaneous existence of different mechanisms of viral transmission between T lymphocytes, such as virological synapses (VS), filopodia, and by newly characterized polysynapses, structures formed between one infected cell and multiple adjacent recipients. I quantified further these diverse modes of contact and studied their relative importance in mediating new target infection. I observed that viral transfer mainly occurs across VS and through polysynapses. I investigated the interplay between the virus and its host cell upon infection. I showed that the virus modulates the physiology of T cells. This is, at least partially, due to the interactions of HIV with the cell cytoskeleton. The viral protein Nef appears as an important modulator of actin cytoskeleton remodeling. It mediates profound changes within the cells, reducing their motility and ability to undergo membrane ruffling, inducing at the same time the formation of filopodia. I also identified Rhô GTPases Racl, 2 and Cdc42 as well as GTPase dynamin2 as possible partners of HIV in mediating free viral infection and cell-cell spread. These regulators of actin cytoskeleton remodeling are likely targets for the virus to get the control over important cellular functions involving actin plasticity. The research presented here allowed to better characterize the means of HIV cell-to-cell spread and the modulation of the cellular biology by the viral infection
Caicedo, Andrès. "Communication cellule-cellule : transfert de mitochondries provenant des cellules souches/stromales mesenchymateuses (CSM) vers des cellules cancereuses." Thesis, Montpellier 1, 2013. http://www.theses.fr/2013MON1T036.
At the beginning of my thesis, I was interested in the process involved in cell communication, more specifically in cell-to-cell interactions. Why does a cell specifically establish contacts with another one, how do cells respond to these interactions and what are the effects? As a model to answer these questions, I studied the interactions between MSCs and two breast cancer cell lines. The study of the communications between MSCs and tumor cells is an alternative to explore and understand tumor progression. MSC recruitment to the tumor is shown to favor the progression of the disease. The mechanisms of this dialogue are multiple and are the object of a great number of studies that aim at finding new therapeutic approaches. The objective of this work was to analyze the interactions between MSCs and cancer cells and evaluate the potential effects of this communication in tumor progression. First, I developed an experimental system of real time confocal microscopy in order to observe the interaction produced between MSCs and the breast carcinoma MDA-MB-231 and MCF-7 cells. I noticed the dynamic formation of tubular structures between the two different cell types and, surprisingly, the passage of mitochondria from MSCs to the cancer cells. Second, we used a 3D system of cell invasion in a collagen matrix, which we adapted for the coculture, in order to observe the effects of the interactions between the MDA-MB-231 and MSCs. In agreement with the literature, we observed an increase in the migratory potential of the cancer cells, an effect that could be linked to the transfer of mitochondria from MSCs to the cancer cells. To answer this question, I set up a protocol to specifically transfer to the cancer cells mitochondria isolated from the MSCs and test directly the functional consequences for the cancer cells. This protocol can be used to transfer mitochondria, not only from MSCs but also from other cells. This method is currently submitted to a patent process. Our results show that the transfer of MSC mitochondria to the cancer cells modifies cancer cells functional properties and increase their invasive and proliferative capacities. Concerning the metabolic activity, we noticed an increase in mitochondrial respiration and ATP production. We also observed an increase in the transcription level of enzymes related to the lipid synthesis and fatty acid oxidation. The results generated with this new protocol of mitochondria transfer show, for the first time, that mitochondria originating from MSCs can improve cellular capacities linked to the tumor progression. The role proposed by the scientific community for the interactions of MSCs with the tumor cells fits with the data generated in our work. Several questions remain open. In particular, could the transfer of mitochondria from MSCs to the cancer cells contribute to the acquisition of resistance to anti-cancer agents observed in patients? The protocol of transfer of mitochondria that we developed in the laboratory is a technique of choice and offers many advantages over other techniques such as microinjection and cytoplasmic hybrids; its implementation is simple and reproducible and can target large numbers of cells. This method opens numerous perspectives and potential applications such as the study of metabolic reprogramming. Thus, we could consider restoring the activity of dysfunctional cells by transferring mitochondria from “metabolically active” or healthy cells. In the long term, one of the applications could be transferring healthy or genetically modified mitochondria to zygotes carrying mitochondrial DNA mutations, in order to treat pathologies like infertility, neuro-degenerative diseases, cancer and premature aging
Ariana, Mohsen. "Simulation numérique de transfert de masse dans une cellule d'électrolyse d'aluminium." Thèse, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/6852.
Résumé : L’étude des mécanismes de transfert de masse des ions dans le bain électrolytique dans une cellule d’électrolyse d’aluminium se heurte aux conditions sévères qui y sont rencontrées : haute température, milieu corrosif, etc. Cependant, il est important de connaitre ces mécanismes de transfert en raison de leurs grands impacts sur les paramètres indicatifs du procédé d’électrolyse, par exemple l’efficacité du courant. Le calcul numérique est une façon de surmonter ces difficultés et d’éclairer les aspects moins connus du procédé de production d’aluminium. L’électrolyte utilisé pour l’électrolyse est composé par différents ions qui se déplacent dans un champ électromagnétique. Ce dernier est généré par le courant électrique intense qui passe par la couche d’aluminium et le bain. Le comportement dynamique des ions est sujet à leur gradient de concentration (la diffusion), à l’écoulement du bain (la convection) et au champ électrique (la migration). Dans le cadre de cette étude, le mouvement des ions est analysé et l’importance relative de la diffusion et de la migration est comparée en régime transitoire pour deux classes d’espèces électroactives et non-électroactives. Pour ces deux types d’espèces, on observe que la migration est le mécanisme dominant de transfert de masse dès les premières phases de l’électrolyse. Cependant, la diffusion devient graduellement le mécanisme le plus important aux électrodes pour des espèces électroactives comme Al[indice inférieur 2]OF[indice inférieur 6][indice supérieur -2] et AlF[indice inférieur 4][indice supérieur -]. Le champ électrique et le champ de concentration ont été simulés à partir d’un modèle 2-D. Les résultats montrent qu’il y a un gradient de concentration entre l’espace inter-électrodes et la région proche de la couche de gelée. Par conséquent, il y a diffusion des espèces entre ces deux régions qui vient diminuer le gradient de concentration et ainsi éviter l’épuisement des ions Al[indice inférieur 2]OF[indice inférieur 6][indice supérieur -2] ou la surconcentration des ions AlF[indice inférieur 4][indice supérieur -]. En outre, un code libre a été développé et implémenté sur OpenFOAM (une plateforme libre de librairies C++). Ce code est capable de résoudre simultanément les équations du champ électrique, du transfert de masse et de Navier-Stokes. Les principaux apports de cette thèse, tel que les modèles et résultats obtenus, peuvent éclairer les mécanismes de transfert de masse dans le bain et aux électrodes et ainsi améliorer leur compréhension.
AULIAC, PIERRE. "Biosynthese et transfert du cholesterol dans la cellule hepatique du rat." Paris 6, 1989. http://www.theses.fr/1989PA066017.
Ramousse, Julien. "Transferts couplés masse-charge-chaleur dans une cellule de pile à combustible à membrane polymère." Vandoeuvre-les-Nancy, INPL, 2005. http://www.theses.fr/2005INPL098N.
Understanding and modelling of coupled mass, charges and heat transfers phenomena are fundamental to analyse the electrical behaviour of the system. The aim of the present model is to describe electrical performances of a PEFMC according to the fluidic and thermal operating conditions. The water content of the membrane and the water distribution in the single cell are estimated according to the coupled simulations of mass transport in the thickness of the single cell and in the feeding channels of the bipolar plates. A microscopic model of a Gas Diffusion Electrode is built up to describe charges transfer phenomena occurring at the electrodes. Completed by a study of heat transfer in the Membrane Electrode Assembly, conditions and preferential sites of water vapour condensation can be highlighted. A set of measurements of the effective thermal conductivity of carbon felts used in fuel cells as porous backing layers have also been performed. Although the value of this parameter is essential for the study of heat transfer, it is still under investigation because of the strong thermal anisotropy of the medium
BEZERRA, CAVALCANTI ELIANE. "Transfert de matiere aux electrodes d'une cellule combinant ecoulement force et rotation." Rennes 1, 1997. http://www.theses.fr/1997REN10126.
Movassagh, Mojgan. "Optimisation du transfert de genes a l'aide de retrovirus recombinants dans les progeniteurs hematopoietiques et les cellules dendritiques chez l'homme." Paris 11, 1998. http://www.theses.fr/1998PA114811.
Ramousse, Julien Maillet Denis. "Transferts couplés masse-charge-chaleur dans une cellule de pile à combustible à membrane polymère." Vandoeuvre-les-Nancy : INPL, 2005. http://www.scd.inpl-nancy.fr/theses/2005_RAMOUSSE_J.pdf.
Georget, Virginie. "Dynamique intracellulaire du récepteur des androgènes dans une cellule vivante." Montpellier 1, 1998. http://www.theses.fr/1998MON1T025.
Book chapters on the topic "Cellule de transfert d'hydrates":
TOPIN, F., C. BOUTILLIER DU RETAIL, E. DELMOND, X. ANN, A. BELNA, D. PONS, and F. PEDUZZI. "Particularités du sauvetage maritime de grande ampleur et capacités de l’Unité médicale d’intervention en milieu maritime du Bataillon de marins-pompiers de Marseille." In Médecine et Armées Vol. 46 No.3, 255–62. Editions des archives contemporaines, 2018. http://dx.doi.org/10.17184/eac.7341.