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Academic literature on the topic 'Électrons – Effets physiologiques'
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Dissertations / Theses on the topic "Électrons – Effets physiologiques"
Lellouche, Didier. "Apport de l'électronthérapie et de l'hyperthermie dans le contrôle local des récidives et métastases cutanées du mélanome malin." Montpellier 1, 1989. http://www.theses.fr/1989MON11060.
Full textFrancis, Ziad. "Simulations Monte-Carlo et étude microdosimétrique pour des irradiations cellulaires à faibles doses en neutrons de 14 MeV." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2007. http://tel.archives-ouvertes.fr/tel-00718322.
Full textDago, Koudou Toussaint. "Exploration de méthodes statistiques pour la comparaison de cartographies cérébrales : Application à l'étude des psychotropes." Compiègne, 1991. http://www.theses.fr/1991COMPD379.
Full textThe recent evolution of computer techniques has allowed the topographical display of electroencephalographic (EEG) activity. In psychopharmacology, EEG permits the description of the incluced modifications of the cerebral electrical activity after administration of a psychotropic drug. The achievement of this studies needs an EEG parameter's statistical evaluation, for wich we only have one tool : the "Significance Probability Mapping (or SPM) utilized for topographical analysis. SPM does not allow the reach all the objectives in pharmaco-EEG studies. Those the aim of this thesis is to explore, propose and develop other more adapted statistical tools. This work has been carried out in tree steps : - study of EEG parameters probability laws ; - improvment of the SPM through the development of a topographical analysis method which allows the assessment of the electrodes relations : the "Conditional Probability Mapping" (CPM) ; - exploration of parametric (Hotelling and Behrens-Fisher) and nonparametric (Wilcoxon) multidmensional statistical hypothesis tests. This is made to determine on one hand the pharmacodynamic parameters of a drug and on the other hand to compare the parameters of this studied drug with those of characteristic drugs belonging to each class of psychotropics. At the end, this thesis gives a statistical procedure which allows henceforth an automatical treatment and a more complete statistical analysis of psychopharmacological protocols, making the neurophysiological internpretation of EEG modifications easier
Ticaud, Nicolas. "Système d’exposition multisource pour les études bioélectromagnétiques portant sur les signaux de communications sans fil." Limoges, 2012. https://aurore.unilim.fr/theses/nxfile/default/005d8eda-2fb8-475d-bfbe-1bc4d339dd9b/blobholder:0/2012LIMO4030.pdf.
Full textRadiofrequency waves are present everywhere in our daily environment. In the last 25 years, concerns have been raised about possible harmful effects of radiofrequency waves on living cells. This work deals with the study of interactions between radiofrequency waves and biological tissues. In the radiofrequency band, particularly between 10 MHz and 10 GHz, the standard parameter for dosimetry is the SAR (Specific Absorption Rate) expressed in W/kg. The measurement of this parameter, from temperature and electric fields, was an integral part of our investigations. This work contributed to the characterization of two exposure systems based on the TEM (Tansverse ElectroMagnetic) cell and to the characterization of an electro-optic probe for SAR measurements. The aim of this work is to design a wideband exposure system for in vitro multiple exposure of biological tissues in conditions similar to a real electromagnetic environment. The originality of the system lies in its conception, based on an incubator for biology, in which mode-stirred reverberating chamber principles were applied, between 1 GHz and 3 GHz
Kadri, Mohamed Abdelhafid. "Plasticité de la fonction posturale : effet de l’entraînement controlatéral et influence de la latéralité du membre inférieur sur le contrôle postural monopodal." Thesis, Pau, 2018. http://www.theses.fr/2018PAUU3030/document.
Full textThe overall objective of this thesis was to study the plasticity of postural function by investigating the effects of a unilateral training program or a sport and/or motor experience. Hence, the effects of various types of chronic (voluntary and electro-induced) and acute exercises (repeated postural task, warm-up and fatigue) were tested on monopodal postural control in static and dynamic conditions. The main findings show that the unilateral training program of voluntary contractions and electro-induced contractions did not improve postural control of the ipsilateral and contralateral limbs despite the increase in muscle strength for both in healthy non-active young adults. The lack of postural control outcome may be primarily related to the conditions of training programs that were not sufficiently close to the ecological conditions of postural control. In contrast, non-fatiguing high-intensity exercise such as warm-up improved monopodal postural control in young sports students regardless of which leg they were assessed. However, this improvement does not appear until 10-15 minutes according to the considered leg after stopping the exercise. Moreover, in athletes practicing symmetrical and asymmetrical sports, the non-fatiguing, acute exercises such as the repetition of a postural task and the warm-up, generated beneficial effects on the static monopodal postural control and enabled to distinguish the dominant leg of the non-dominant leg. In contrast, the fatiguing acute exercise disrupted postural control regardless of the nature of sport practiced and the leg assessed
Mouawad, Lena. "Monte Carlo simulations and a theoretical study of the damage induced by ionizing particles at the macroscopic scale as well as the molecular scale." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAE009/document.
Full textThe work presented in this thesis can be placed in the context of biological damage simulation. Webegin with a macroscopic study where we question the relevance of absorbed-dose-based treatmentplanning. Then we move on to a micro-dosimetry study where we suggest the use of morebiologically relevant probes for damage, such as DNA strand breaks. More focus is given to thefundamental considerations on which the simulations are based, particularly the interaction crosssections. Due to the complexity of the biological medium, the interaction cross sections with waterare often used to simulate the behavior of particles. We develop a parallel user-friendly algorithmthat can provide the ionization cross sections for any molecular target, making use of particular toolsthat allow to overcome the computational difficulties, which makes our program particularlyinteresting for complex molecules. We provide preliminary results for water, ammonia, formic acidand Tetrahydrofuran
Books on the topic "Électrons – Effets physiologiques"
Coșofreț, Vasile V. Pharmaceutical applications of membrane sensors. CRC Press, 1992.