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Academic literature on the topic 'Transporteurs d'ions'
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Dissertations / Theses on the topic "Transporteurs d'ions"
Gagnon, France. "Transporteurs d'ions dans des cellules d'épithélium rénal, rôle des purinocepteurs-P¦2, de la protéine kinase C et des protéines de choc thermique." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ39746.pdf.
Full textDintilhac, Agnès. "Caractérisation du système ADC, permease de type ABC impliquée dans la transformation de Streptococcus pneumoniae, et définition d'un nouveau groupe de transporteurs d'ions métalliques." Online version, 1996. http://bibpurl.oclc.org/web/24916.
Full textDintilhac, Agnès. "Caractérisation du système ADC, perméase de type ABC impliquée dans la transformation de Streptococcus pneumoniae, et définition d'un nouveau groupe de transporteurs d'ions métalliques." Toulouse 3, 1996. http://www.theses.fr/1996TOU30333.
Full textCapasso, Laura. "Molecular insight into ion transport for calcification in symbiotic and non-symbiotic corals." Electronic Thesis or Diss., Sorbonne université, 2021. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2021SORUS258.pdf.
Full textThe construction and maintenance of coral reefs primarily depends on the calcification of corals, which produce a rigid skeleton made of CaCO3 in the crystalline form of aragonite. Most reef-building corals live in symbiosis with photosynthetic dinoflagellates of the Symbiodiniaceae family, which provide the coral host with energy and nutrients. Given their ecological importance, much progress has been made in identifying key elements of the mechanisms underlying coral calcification. Nevertheless, there are still significant gaps in our understanding. Foremost is the characterization of ion transporters, used by the coral calcifying cells to promote calcification. To contribute to this lack of knowledge, targeted and broad approaches, coupled with molecular and bioinformatics tools, have been used throughout this thesis. Using the targeted approach, ion transporter proteins, previously reported to be involved in calcification of other calcifying species, have been identified for the first time in the genome and transcriptome of the symbiotic coral Stylophora pistillata. Whereas, using a broad approach, novel candidate genes for roles in calcification have been identified in the non-symbiotic coral Tubastraea spp. Overall, both approaches contributed to a better understanding of the ion transporting mechanisms used by the coral calcifying cells to promote calcification in this ecologically important group of marine animals
Pinoche, Monique. "Transport facilité dans les membranes échangeuses d'ions : application à l'extraction du dioxyde de carbone d'un mélange gazeux par le transporteur éthylènediamine monoprotonée." Rouen, 1989. http://www.theses.fr/1989ROUES027.
Full textOuahid, Soumia. "Transport facilité du glucose à travers une membrane échangeuse d'anions avec l'ion borate comme transporteur." Rouen, 1994. http://www.theses.fr/1994ROUES029.
Full textJuárez, Ugarte Maria Eugenia. "Transport d’iode par le transporteur de sodium/acide monocarboxylique SMCT1." Thèse, 2010. http://hdl.handle.net/1866/4282.
Full textIbuprofen sensitive, Sodium Monocarboxylate Transporter (SMCT1) is expressed in the apical membrane of diverse epithelia. Its physiological role in the thyroid remains however unknown, but it has been proposed that SMCT1 could act as an apical iodide transporter required for the main function of the gland: the thyroid hormone synthesis. We previously reported that SMCT1 exhibit a [Na+]e sensible anionic leak current that could account for the electrogenic transport of iodide. However, an iodine efflux sensitive to ibuprofen but independent of [Na+]e, was also observed in primary cultures of porcine thyrocytes, suggesting another mechanism of iodine transport mediated by SMCT1. This work aims to understand the characteristics of this type of transport using Xenopus laevis oocytes as an SMCT1 expression system. By realising 125I uptakes, we found that SMCT1 transports iodide in an ibuprofen sensitive manner (30nmol/oocyte/h). While nonsaturable uptake iodide kinetics were observed, SMCT1 iodide transport was Na+ dependent as shown by the transport reduction when the [Na+]e is replaced by NMDG. The possibility of artifacts, such as non specific binding and the overexpression of endogenous proteins, was analysed. By observing that the vast majority of the radioactive iodide is found in the soluble portion of the oocyte, we excluded non-specific binding of iodide to the cell membrane. However, it is believed that most of the iodide entering the cell is not free and must be bound to some intracellular proteins. Indeed, there is a significant reduction of SMCT1-mediated iodide transport when 2% BSA is present at the extracellular solution. Furthermore, the lack of iodide transport when overexpressing other proteins than SMCT1, precludes the possibility of an overexpression of endogenous transport proteins like chloride channels for example. In fact, the transport of iodide appears to be specific to the expression of SMCT1 and interestingly of another monocarboxylate transporter MCT1. The analysis of all trials, including the fact that the amplitude of the observed transport is 20 times larger than the leak current lead us to propose that SMCT1 can carry iodide in an electroneutral manner. However, the mechanism by which this is accomplished is not easy to identify and future experiments will be necessary to determine whether this transport is observed in other SMCT1 expression systems.