Дисертації з теми "MRI NMR"
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Highton, Louise Ariadne Ruth. "Using SABRE in NMR and MRI." Thesis, University of Hull, 2013. http://hydra.hull.ac.uk/resources/hull:8323.
Повний текст джерелаKo, Han-Bong. "NMR und MRI an mechanisch beanspruchten Polyoxymethylenproben." Phd thesis, [S.l. : s.n.], 2005. http://elib.tu-darmstadt.de/diss/000534.
Повний текст джерелаHiltunen, S. (Sami). "Puun lahoamisprosessin seuraaminen NMR- ja MRI-menetelmillä." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201801201103.
Повний текст джерелаSmart, Sean Christopher. "NMR examinations of control and ischemic rodent brain tissue." Thesis, Queen Mary, University of London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309450.
Повний текст джерелаR, F. Marques JoseÌ Pedro. "Effects of dipolar fields in NMR and MRI." Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416419.
Повний текст джерелаZhang, Qilei. "NMR and MRI studies of controlled release drug delivery systems." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610886.
Повний текст джерелаChoi, Seongjin. "Proton NMR and MRI studies of sub-millimeter sized biological objects." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1204559010.
Повний текст джерелаUríča, Jozef. "Chyby v MRI metodách měření difúzních koeficientů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218553.
Повний текст джерелаVernickel, Peter. "A multi-element transmit system for MRI." Berlin Köster, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=3000504&prov=M&dok_var=1&dok_ext=htm.
Повний текст джерелаEnwere, M'chuks Paulinus. "Evaluation of NMR and MRI techniques for use in special core analysis." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46761.
Повний текст джерелаDíaz, Anadón Laura. "Transient hydrodynamics and reaction in trickle-bed reactors using NMR and MRI." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612866.
Повний текст джерелаYamaguchi, Makoto, Kazunori Suzuki, and Stephen Altobelli. "Diffusion of water in thermally fractured granite rock cores studied by PFG NMR and MRI: Diffusion of water in thermally fractured granite rock coresstudied by PFG NMR and MRI." Diffusion fundamentals 3 (2005) 24, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14315.
Повний текст джерелаChen, Dong. "Acceleration of the spatial selective excitation of MRI via sparse approximation." kostenfrei, 2009. https://mediatum2.ub.tum.de/node?id=956913.
Повний текст джерелаHua, Jianmin. "Development of NMR/MRI techniques and chemical models for the study of atherosclerosis." Case Western Reserve University School of Graduate Studies / OhioLINK, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=case1057263774.
Повний текст джерелаShi, Fan. "NMR/MRI SIGNAL ENHANCEMENT BY REVERSIBLE EXCHANGE (SABRE) AND HETEROGENEOUS SABRE (HET-SABRE)." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/dissertations/994.
Повний текст джерелаEichner, Cornelius. "Slice-Accelerated Magnetic Resonance Imaging." Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184944.
Повний текст джерелаKoptyug, Igor V., Anna A. Lysova, Alexey V. Khomichev, and Renad Z. Sagdeev. "27 Al NMR/MRI Studies of the Transport of Granular Al 2 O 3." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194270.
Повний текст джерелаKoptyug, Igor V., Anna A. Lysova, Alexey V. Khomichev, and Renad Z. Sagdeev. "27 Al NMR/MRI Studies of the Transport of Granular Al 2 O 3." Diffusion fundamentals 5 (2007) 2, S. 1-7, 2007. https://ul.qucosa.de/id/qucosa%3A14266.
Повний текст джерелаTannus, Alberto. "Desenvolvimento da tecnologia de tomografia por ressonância magnética nuclear." Universidade de São Paulo, 1987. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-21052007-164959/.
Повний текст джерелаWe describe in this work the development of hardware and software necessary to implement the Magnetic Resonance Imaging (MRI) techniques. Our major subjects were the construction of an acquisition and control system which allowed the operation of a pulsed Fourier NMR spectrometer as a NMR Tomograph; further we oriented the developing of a NMR spectrometer whose parameters could be easily reconfigured by the controlling system. As a result we obtained a sophisticated equipment which allows, more than the proposed, working with high resolution spectroscopic techniques and spectroscopy in solids. Since the basic techniques employed in NMR and CT Tomographs are well known, a great emphasis was also given on the understanding of the image reconstruction techniques that constitutes today the frontier of research in this area. The results obtained with the system described here are considered good, comparable to the results from commercial units developed in cooperation with imaging groups located in universities abroad.
Waiter, Gordon David. "The NMR proton relaxation effectiveness of paramagnetic metal ions and their potential as MRI contrast agents." Thesis, University of Aberdeen, 1995. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU077829.
Повний текст джерелаCeccarelli, Mattia. "Optimization and applications of deep learning algorithms for super-resolution in MRI." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21694/.
Повний текст джерелаPecháček, Libor. "Optimalizace parametrů akvizice MR signálu pro měření malých objektů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218233.
Повний текст джерелаYamaguchi, Makoto, Kazunori Suzuki, and Stephen Altobelli. "Diffusion of water in thermally fractured granite rock cores studied by PFG NMR and MRI." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194883.
Повний текст джерелаMashni, Jamil Assad. "DEVELOPMENTS IN SIGNAL AMPLIFICATION BY REVERSIBLE EXCHANGE (SABRE) OF 15N AND 13C NUCLEI TOWARDS APPLICATIONS IN MRI." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2516.
Повний текст джерелаHussain, Rehan. "NMR studies of carbon dioxide sequestration in porous media." Thesis, University of Cambridge, 2015. https://www.repository.cam.ac.uk/handle/1810/248877.
Повний текст джерелаHe, Ping. "NOVEL EXPERIMENTAL APPROACHES AND THEORETICAL MODELS FOR IMPROVING SENSITIVITY AND INFORMATION CONTENT OF NMR AND MRI SPECTROSCOPY." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/dissertations/757.
Повний текст джерелаAursand, Ida Grong. "Low-field NMR and MRI studies of fish muscle : Effects of raw material quality and processing." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-5706.
Повний текст джерелаLi, Wei. "Study of Cardiac Function and Energetics in Mouse Models of Cardiomyopathies by MRI and NMR Spectroscopy." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1269983160.
Повний текст джерелаNunes, Dourado de Carvalho Victor. "Dipolar order relaxation (T1D) in myelin : a combined inhomogeneous MT (ihMT) MRI and Jeener-Broekaert NMR approach." Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0195.
Повний текст джерелаInhomogeneous magnetization transfer (ihMT) is a MRI technique that enables accurate measurement of myelin content in the central nervous system in vivo. ihMT highlights the dipolar order effects and is weighted by the associated relaxation time T1D. T1D is modulated by molecular dynamics, however it provides additional sensitivity to slow motional processes. Hence assessing T1D is important to add new information to characterize biological tissues and associated pathophysiology. ihMT and other MRI techniques can be used to evaluate myelin in vivo, and help diagnosis and follow-up of multiple sclerosis patients. New experiments have suggested that myelinated tissues and membranes would exhibit multiple T1D components probably due to a heterogeneous molecular mobility and relatively slow magnetization mixing mechanisms. To better understand T1D relaxation, the presented work uses a NMR method, the Jeener-Broekaert sequence. With this sequence, multi-T1D relaxation was observed on synthetic lipid membranes, surrogate models of myelin. This work proposes a new ihMT model with two dipolar order reservoirs and associated T1Ds. Quantitative T1D maps were generated. Implementation of the proposed model found short and long T1D on the order of 500 μs and 10 ms, respectively, in fixed rat spinal cord. Combining NMR and MRI assessments of T1D may help understand what states of myelin, in terms of composition, structure and molecular dynamics, contribute to the ihMT signal in vivo
Haga, Kristin Kerr. "The combined application of 'H MRI and '19F MRS to the study of cerebroprotection." Thesis, University of London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312006.
Повний текст джерелаKekkonen, P. (Päivi). "Characterization of thermally modified wood by NMR spectroscopy:microstructure and moisture components." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526206127.
Повний текст джерелаTiivistelmä Puuta pystytään hyödyntämään useilla eri aloilla ja se on materiaalina tärkeä etenkin Fennoskandiassa merkittävälle metsäteollisuudelle. Useiden erilaisten puun käsittelymenetelmien joukossa lämpökäsittely on kasvattanut voimakkaasti suosiotaan viime vuosikymmeninä. Kyseessä on ympäristöystävällinen menetelmä, jolla voidaan pidentää puun käyttöikää sekä käytettävyyttä erilaisissa sovelluskohteissa. Tämän väitöskirjan päämääränä on ollut lämpökäsitellyn puun ominaisuuksien tutkiminen ja uuden tiedon saaminen puussa lämpökäsittelyprosessin myötä tapahtuvista muutoksista. Työssä käytettiin useita eri NMR-menetelmiä lämpökäsitellyn mäntypuun (Pinus sylvestris) mikrorakenteen sekä puussa olevan kosteuden aiheuttamien vaikutusten tutkimiseksi. Työssä tutkittiin eri lämpötiloissa käsiteltyjä mäntypuunäytteitä, joita verrattiin vastaaviin käsittelemättömiin näytteisiin. Veden ja metaanin diffuusiota tutkittiin PGSTE-menetelmällä puun erittäin anisotrooppisen solurakenteen sisältämien huokosten mittojen määrittämiseksi. NMR-kryoporometria- ja -relaksometriamittaukset antoivat tietoa puuhun imeytyneen sidotun ja vapaan veden määrästä ja esiintymisympäristöstä. Kryoporometria-mittausten tuloksista saatiin yläraja sidotun veden esiintymispaikkojen koolle, ja kryoporometria- ja relaksometriamittausten tuottaman tiedon yhdistäminen mahdollisti soluseinämien mikrohuokosten koon määrittämisen. Magneettikuvausta käytettiin näytteisiin absorboituneen veden avaruudellisen jakauman määrittämiseen. Käytetyt menetelmät tarjoavat laajan kokonaiskuvan lämpökäsittelyprosessin vaikutuksista puulle. Tämän työn tulokset antavat puutiedettä ja -teollisuutta hyödyttävää uutta tietoa lämpökäsitellyn männyn mikrorakenteesta sekä sen suhteesta kosteuteen. Väitöskirja myös osoittaa käytettyjen NMR-menetelmien soveltuvan hyvin puun tutkimiseen. Tämän tutkimuksen myötä kehitettyjen menetelmien avulla voidaan määrittää mm. optimaalinen lämpökäsittelylämpötila, joka on riittävän korkea haluttujen ominaisuuksien kannalta aiheuttamatta kuitenkaan puun mikrorakenteen hajoamista
Ayala, Julio Enqrique II. "A 200-MHz fully-differential CMOS front-end with an on-chip inductor for magnetic resonance imaging." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4729.
Повний текст джерелаRandtke, Edward Alexander. "Development and Evaluation of Exchange Rate Measurement Methods." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/314652.
Повний текст джерелаAmor, Nadia [Verfasser]. "Novel methods and applications of NMR and MRI : low-power RF excitation and hyperpolarized xenon-129 / Nadia Amor." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1021937592/34.
Повний текст джерелаBush, Isabelle. "NMR studies of enhanced oil recovery core floods and core analysis protocols." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/290145.
Повний текст джерелаFuhrer, Erwin [Verfasser], and J. G. [Akademischer Betreuer] Korvink. "Advanced interfaces for biomedical engineering applications in high- and low field NMR/MRI / Erwin Fuhrer ; Betreuer: J. G. Korvink." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1195049161/34.
Повний текст джерелаCassidy, Maja. "Hyperpolarized Silicon Particles as In-vivo Imaging Agents." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10649.
Повний текст джерелаEngineering and Applied Sciences
Javed, M. A. (Muhammad Asadullah). "Advanced liquid and gas NMR methods for probing topical materials." Doctoral thesis, Oulun yliopisto, 2019. http://urn.fi/urn:isbn:9789526222493.
Повний текст джерелаOriginal papers The original publications are not included in the electronic version of the dissertation. Javed, M. A., Kekkonen, P. M., Ahola, S., & Telkki, V.-V. (2015). Magnetic resonance imaging study of water absorption in thermally modified pine wood. Holzforschung, 69(7), 899–907. https://doi.org/10.1515/hf-2014-0183 Javed, M. A., Ahola, S., Håkansson, P., Mankinen, O., Aslam, M. K., Filippov, A., … Telkki, V.-V. (2017). Structure and dynamics elucidation of ionic liquids using multidimensional Laplace NMR. Chem. Commun., 53(80), 11056–11059. https://doi.org/10.1039/c7cc05493a http://jultika.oulu.fi/Record/nbnfi-fe2017102750335 Javed, M. A., Komulainen, S., Daigle, H., Zhang, B., Vaara, J., Zhou, B., & Telkki, V.-V. (2019). Determination of pore structures and dynamics of fluids in hydrated cements and natural shales by various ¹H and ¹²⁹Xe NMR methods. Microporous and Mesoporous Materials, 281, 66–74. https://doi.org/10.1016/j.micromeso.2019.02.034 http://jultika.oulu.fi/Record/nbnfi-fe2019041712678 Komulainen, S., Roukala, J., Zhivonitko, V. V., Javed, M. A., Chen, L., Holden, D., … Telkki, V.-V. (2017). Inside information on xenon adsorption in porous organic cages by NMR. Chemical Science, 8(8), 5721–5727. https://doi.org/10.1039/C7SC01990D http://jultika.oulu.fi/Record/nbnfi-fe201709288804 Håkansson, P., Javed, M. A., Komulainen, S., Chen, L., Holden, D., Hasell, T., … Telkki, V.-V. (2019). NMR relaxation and modelling study of the dynamics of SF₆ and Xe in porous organic cages. Manuscript
Williamson, Kathryn Maxine Williamson. "NMR Spectroscopy as a Robust Tool for the Analysis of Lipids in Fish Oil Supplements and Coffee." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523978049728289.
Повний текст джерелаAdhikari, Rajan Deep. "MRI T2 Signal Changes Indicate Tau Pathophysiology in a Murine Alzheimer's Disease Model." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6944.
Повний текст джерелаJulínek, Michal. "Numerické modelování vlivu magnetické susceptibility na MR obrazy." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218616.
Повний текст джерелаWang, Xiaoling. "MRI and NMR Investigations of Transport in Soft Materials and Explorations of Electron-Nuclear Interactions for Liquid-State Dynamic Nuclear Polarization." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/75067.
Повний текст джерелаPh. D.
笠井, 純. "超流動3He-Aにおけるカイラルドメイン構造の可視化". Kyoto University, 2019. http://hdl.handle.net/2433/236601.
Повний текст джерелаDuarte, Mendes Catita Leonor. "Contribution of NMR and Raman imaging for modeling and rationalization of the impregnation process of metallic precursors in porous media." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1262/document.
Повний текст джерелаThe objective of this work is to characterize the impregnation step in terms of physical phenomena (capillarity and diffusion) and chemical phenomena (surface interaction) in order to identify the key descriptors of this step in order to improve the preparation hydrotreating catalysts. This involves monitor spatial and temporally the transport of the species in the impregnation solution within the porosity, more particularly in the case of Ni(Co)MoP/?-Al2O3 catalysts preparation.An original MRI approach has been developed to follow in-situ the impregnation step from a solution of mixed nature with more than one metal precursor in the presence of an additive. MRI provides access to the spatial distribution of all species within the catalyst with a spatial resolution of 39 × 39 µm. Raman imaging allows an identification of the chemical nature of the species in solution with a spatial resolution of 16.2 × 16.2 µm.First, the phenomena involved in the impregnation of model solutions composed of Ni (or Co), were studied by modifying the parameters of the solution. These experiments were then used as the basis for the development of a mathematical model to rationalize the impregnation step. In a second part, this study was extended to the preparation of hydrotreatment catalysts. Several phenomena have been evaluated here, notably the impact of the presence of phosphorus on the transport of Mo species, possible competition of adsorption between P, Co and Mo and the effect of the presence of citric acid.This study allows a better control of the impregnation step and thus of the distribution profile of the active phase, which has an impact on the catalytic performance
Jeništa, Petr. "Optimalizace metody měření magnetické susceptibility." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218874.
Повний текст джерелаDattola, Tiziano. "Caratterizzazione mediante tecniche di imaging a risonanza magnetica nucleare dello spiazzamento di fluidi non miscibili nei mezzi porosi." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20013/.
Повний текст джерелаGeng, Jianzhao. "Flux pumping for high-Tc superconducting (HTS) magnets." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/268221.
Повний текст джерелаBlanc, Jordy. "Modifications métaboliques lors de l'activation cérébrale : suivi par spectroscopie de résonance magnétique nucléaire du proton et du carbone 13." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0336/document.
Повний текст джерелаLactate has been considered as a waste metabolite for many years. However, this vision has been reconsidered recently, with the appearance of the notion of aerobic glycolysis and lactate shuttles in different cell types (muscle, brain, and sperm). Concerning the brain, in vitro, ex vivo and in vivo studies carried out over the last 20 years have shown, on the one hand, that astrocytes produce lactate and, on the other hand, that lactate can be an energetic substrate for the central nervous system (CNS), and more particularly neurons. This lactate shuttle between astrocyte and neuron was first proposed in 1994 by Pellerin and Magistretti (called ANLS, for astrocyte-neuron lactate shuttle). Despite many studies since then, the existence of a net transfer of lactate between astrocytes and neurons has still not been demonstrated in vivo. In this regard, visualization of lactate production in vivo in the activated brain is essential. The role of lactate transporters, MCTs (Monocarboxylate Transporters), in detecting this signal is also a key issue. The objective of this thesis was to develop in vivo NMR spectroscopy located in the somato-sensory cortex of rats under brain activation conditions. First, experiments were carried out to develop the neural stimulation protocol and to obtain a sufficient signal-to-noise ratio to be able to quantify lactate. Once the protocol was established on control rats, the study was performed on genetically modified rats and down-regulated for MCT, either neuronal or astrocytic. The aim was to determine whether this key partner of the ANLS has an influence on lactate fluctuations during brain activation. In addition to in vivo proton spectroscopy and functional MRI, carbon-13 NMR studies were performed ex vivo. The major result of this thesis shows that in the absence of the neuronal lactate transporter, not only is the increase in lactate lost during brain stimulation but the BOLD signal on the fMRI is also lost. This result suggests, for the first time, that neural activity is highly dependent on the lactate transporter
Wang, Biyun. "Application des analyses par RMN/IRM et gammadensimétrie à la réparationdu béton âgé : étude des transferts hydriques, de l’impact sur l’hydratation du mortierde réparation et sur la durabilité du béton réparé." Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1159/document.
Повний текст джерелаThe coating area of steel reinforced concrete structures is subjected during service life time to various aggressive agents (carbon dioxide, chloride ions, etc.), which causes corrosion of steel rebars. Concerning the maintenance, repair works of degraded concrete cover are generally imposed to ensure its integrity and structural safety, and to extend long-term durability. This research aims in exploring moisture transfers which limit the efficiency of repair work during mortar hydration. Microstructure evolution and water profiles are obtained by non-destructive techniques such as Magnetic Resonance Imaging (MRI) and Gamma-Ray Attenuation (GRA) since casting until 28 days. The durability of repaired concrete is involved after the repair procedure. The effect of drying is avoided in this research. Sealed mortar of the same formula is prepared to compare its hydration performance with the repair mortar. Various conventional techniques help to supplement the results obtained by MRI and GRA. The configuration of designed repair systems is shown. Moisture transfers at the interface between the repair mortar and the old concrete are investigated during the repair procedure (0 - 28 days), which allows exploring the mechanisms of physico-chemical couplings. Efficient repair work can be determined for various repair materials, various substrates (initially-saturated or initially-dried), various environmental conditions, etc. Furthermore, total porosity is measured by GRA or by Mercury Intrusion Porosimetry (MIP) after the repair procedure (1 - 2 months). Pore size distribution (PSD) is also investigated by MIP at different positions within the repair systems. Durability indicators (Cl- and CO2) after the repair procedure (> 2 months) present a prevention of chloride penetration and a non-evident influence on carbonation. Evolution is followed during penetration, in order to explore repair efficiency during prolonged service life time. This methodology could also be applied on various systems where exist moisture transfers. For example, a protective layer of Ultra High Performance Fiber-Reinforced Concrete (UHPFRC) on conventional concrete. In conclusion, this methodology is a tool to investigate the repair systems in a systematic and quantitative way, by combining non-destructive and destructive techniques. It is interesting to compare aforementioned systems. Repair efficiency is investigated in order to ensure a long-term durability
Hamraoui, Khalid. "Contrôle quantique de la rotation moléculaire et de processus de Résonance Magnétique Nucléaire." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK020/document.
Повний текст джерелаThe goal of this thesis is to apply quantum control techniques to manipulate molecular rotation and to enhance the efficiency of processes in Nuclear Magnetic Resonance.These techniques have been used theoretically and experimentally to control the orientation of a symmetric top molecule by means of THz laser fields. This study has been extended to the case of a long interaction distance between the field and the sample. In this case, the molecule cannot be approximated as isolated. We have also shown the extend to which the time evolution of the degree of orientation can be shaped. Optimal control techniques were used to design the THz field which allows to reach the corresponding dynamics, both at zero and non zero temperatures. Another chapter proposes a new optimization algorithm in the case of periodic quantum dynamics. We apply this algorithm to the maximization of the SNR in NMR. A last chapter is dedicated to a popular paper about the tennis racket effect. This geometric effect can be observed in any asymetric rigid body