Teses / dissertações sobre o tema "Orano"
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Fondement, Valentin. "Conception d'une sonde diagraphique neutronique dans le cadre de l'exploration et de l'exploitation minière de l'uranium". Electronic Thesis or Diss., Université Grenoble Alpes, 2023. http://www.theses.fr/2023GRALY076.
Texto completo da fonteThis PhD in the frame of CEA - ORANO Mining collaboration, aims to develop a new logging tool, based on neutron active interrogation, in the scope of uranium exploration and exploitation. A large amount of its production comes from In situ recovery mines, by leaching chemically the ore in the ground over hundreds of meters. It is mandatory to determine the amount of uranium available, but also the permeability of the sand, to evaluate the profitability. This geological quantity can be assessed from the measurement of the porosity hydrogen that is the volume fraction of water in the rock formation. It is possible to measure this one by using neutron probes. Uranium, and especially its 235 isotope, can also be measured with that kind of logging tools, if they rely on a pulsed neutron generator. This research leads to a new probe design that allows performing the both measurements with a unique cadmium-shielded-helium 3-proportional counter. The generator emits a 50 µs neutron burst every 5 ms (at 200 Hz). In the 800 µs after the salvo we can measure the not-fully-thermalised neutrons, thanks to the cadmium shield acting like a filter. The obtained count is inversely proportional to the hydrogen, and water, environment content. Over the following milliseconds, thermal neutrons of the rock formation will lead to 235U nuclei fissions, which emit in average 2.5 prompt fission neutrons. A chunk of these neutrons is emitted toward our counter, as the neutrons from the generator, fully thermalized after 800 µs, cannot cross the cadmium. Thanks to that double energy-time discrimination, it is possible to measure the prompt fission neutron signal contribution, which is proportional to the uranium concentration. As thermal neutrons are absorbed by the hydrogen content in the environment, we can use the porosity hydrogen measurement to correct the prompt fission neutrons signal from its effect. Furthermore, a parametric study has been conducting, using the Monte-Carlo simulation code MCNP 6.1, to compare the quantities that affect the measurements performances (e.g. diameter, standoff, casing thickness, casing, mudcake thickness, lithology). Finally, the new measurement methods feasibility has been validated through two experimental campaigns: in one hand, the capability of the electronics to handle input count rates in the 106 s-1 yield, during and right after a pulse of the neutron D-T generator. In the other hand, a laboratory model of the neutron probe has been built and tested in a dedicated calibration drum, filled with 1.6 t Fontainebleau sand. An agreement between experiment and computer simulations has been found, which validates the uranium concentration measurement and allows the understanding of the main components of the active background. This study highlighted the contribution of the oxygen 17 activation delayed neutrons, in the water saturated sandstone environments. The signal and noise analysis method were qualified, leading to the first estimations of in situ performances, like the detection limit of the uranium concentration measurement, from 10 to 200 ppm for 3 min of acquisition, for hydrogen porosities ranging respectively from 0 to 40%
Lao, Hongbai. "Novel microporous organo-clay materials and organo-clay polymeric composite membranes". Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6830.
Texto completo da fonteProbitts, E. J. "Organo-rhodium and organo-ruthenium chemistry : synthetic, structural and mechanistic studies". Thesis, University of York, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355522.
Texto completo da fonteFisher, George Ayrton. "Synthetic and catalytic studies of organo and organo transition metal bismouth compounds". Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357646.
Texto completo da fonteMartinelli, Marcia. "The synthesis and properties of some organo-ruthenium and organo-osmium clusters". Thesis, University of Cambridge, 1991. https://www.repository.cam.ac.uk/handle/1810/271906.
Texto completo da fonteForeman, Mark Russell StJohn. "Organo-sulfur phosphorus chemistry". Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/27934.
Texto completo da fonteNieder, Anian. "Energetic organo-silicon compounds". Diss., Ludwig-Maximilians-Universität München, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-162183.
Texto completo da fonteCampbell, Selina. "New organo-molybdenum complexes". Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/272559.
Texto completo da fonteGloaguen, Bruno. "Synthèses en étoile de molécules activées par des greffons cationiques organo-fer et organo-cobalt". Bordeaux 1, 1991. http://www.theses.fr/1991BOR10605.
Texto completo da fonteFodil, Abdelkrim. "Ménages et logements dans la ville d'Oran : évolution et caractéristiques récentes". Paris 5, 1987. http://www.theses.fr/1987PA05H077.
Texto completo da fonteBeladis, Touria. "Algérie : la périphérie oranaise et ses difficultés d'intégration urbaine : étude centrée sur Pont Albin, Aïn Beïda, Bendaoud". Paris 1, 1997. http://www.theses.fr/1997PA010687.
Texto completo da fonteAlgeria has inherited of a very limited stock of real estate which has been rapidly exhausted since. Indeed, just a few years after the country's independance, the cities which saw their native populations rise rapidly due to the arrival of rural inhabitants, no longer have any possibility of integrating new arrivals. What is more, the policy-option of the algerian government, baptised "the industrialising industry", considered lodging to be a social sector that the public powers should assume, but did not see it as directely productive. As a result, it was neglected in favour of the basic industrial poles. Only towards the end of the second 5-year plan, faced with a crisis in housing and the urgency of needs which the population expressed, did autorities launch projects to build social lodging. However, the rhythm of construction has been quite slow despite the use of techniques of prefabricated building which are poorly adapted to the algerian society. Moreover, the waves of migration continue, growing in amplitude, while growth rates of the population touched 3. 2% in 1987. Algerian cities have thus grown beyond their administrative limits in order to assimilate the increase in population. Oran is one of these cities where the flow of population and their implantation at its periphery usually takes place in a very chaotic and illegal manner. The buildings are often quite simple and inserted in spaces of low quality. Despite this, they are expensive due to problems in supplying building material which have affected algerian constructors and to high prices. The existence of centres of precarious lodging within the periurban space of oran dates back to the colonial era. Today, this periphery experiences and uncontrolled proliferation of spontaneous lodging with quite varied mechanisms and forms. These different aspects will be developped in the present thesis when dealing with the city of oran and more specifically in the comparative study of suburban development in the three douars which are representative of the oran periphery, i. E. Bendaoud, ain beida and pont albin
Ech-Cherif, El-Kettani Sakina. "Les germènes : sources d'hétérocycles organo-matalliques". Phd thesis, Université Paul Sabatier - Toulouse III, 2005. http://tel.archives-ouvertes.fr/tel-00392024.
Texto completo da fonteLux, Karin. "Organo-Phosphor-Chalkogenide und Elektronenreiche Phosphane". Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-117246.
Texto completo da fonteMaj, Stanislaw Paul. "ESR studies of organo-halide radicals". Thesis, University of Leicester, 1985. http://hdl.handle.net/2381/33795.
Texto completo da fonteGunawardena, Rohith. "Global distribution of organo-bromine gases /". Full text open access at:, 1989. http://content.ohsu.edu/u?/etd,245.
Texto completo da fonteLiddell, Michael John. "Studies in organo-transition metal chemistry /". Title page, contents and summary only, 1989. http://web4.library.adelaide.edu.au/theses/09PH/09phl712.pdf.
Texto completo da fonteMažvilaitė, Inga. "Bendrovės organo sprendimų priėmimas ir negaliojimas". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2009~D_20110709_152328-76537.
Texto completo da fonteActivity of the Companies is organized under mixed system of corporate governance in the Republic of Lithuania. In the Company in any case the General Meeting and at least one of the governing bodies - the Manager or the Board – are constituted. Meanwhile, the Supervisory Board under the existing laws is kept as an optional body of the company and is rather rare in practice. The bodies of the company, carrying out their activities, take various decisions. The analysis of provisions on company law and the decisions of the courts of the Republic of Lithuania showed that the decisions of the bodies shall be considered valid if: 1) they shall not violate the mandatory rules indicated in legal acts or company's founding documents, related to initiation and convening of the meeting and adoption of its decisions; 2) the decision shall not prejudice the rights of any person or the public interest. Article 2.82 of the Civil Code of the Republic of Lithuania provides bases under which the decisions of the bodies of the company may be invalidated under the court decisions, if they: 1) contravene the imperative provisions of the law; 2) contravene founding documents of a legal person; 3) contravene principles of reasonableness and good faith; and 4) violate rights and interests of the creditor. It should be noted that the decision may be revoked only if its consequences can not be removed at any other rational way. Such action in the court can be taken only by indicated subjects... [to full text]
Kelland, Malcolm. "Organo-transition metal boron hydride chemistry". Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258164.
Texto completo da fonteHughes, Andrew K. "Studies in organo-transition metal chemistry". Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276580.
Texto completo da fonteAtkinson, Peter J. "Characterisation of microemulsion-based organo-gels". Thesis, University of East Anglia, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292227.
Texto completo da fonteWilson, Andrew. "Frontiers of organo- and hydridocalcium chemistry". Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767564.
Texto completo da fonteMkehlane, Moleko Samuel. "Electroanalysis of Organo-Chalcogenic Perovskite Nanomaterials". University of the Western Cape, 2017. http://hdl.handle.net/11394/6115.
Texto completo da fonteOrganometallic halide perovskite solar cells have developed as one of the most promising contenders for the production of solar cells. The generic perovskite (PS) structure ABX3 allows manufacturing a broad range of PS materials by simple modification of building blocks A, B, and X (A = organic group, B = metal, and X = halide). The preparation of a series of solution-processed solar cells based on methylammonium (MA) lead halide derivatives, CH3NH3PbX3 (X=Cl, Br, and I) has been reported. These solar cells showed tunable optical properties depending on the nature and ratio of the halides employed. The photovoltaic performance of perovskite solar cells is dependent on the absorption of the light spectrum. The photovoltaic performance can be improved by widening the light absorption towards the near infrared spectrum. A panchromatric material that absorbs all the light from the ultra-visible to near infrared of the solar spectrum is an ideal photoactive layer. The optimal bandgap for single junction solar cells is known to be 1.1 and 1.4 eV. However, the bandgaps of methylammonium lead trihalide perovskites are beyond this range, and this inspired the realization of the lower bandgap perovskites.
2021-08-31
Millett, Adam J. "Organo-iridium anticancer and antibacterial complexes". Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/74076/.
Texto completo da fonteSouza, Donizete de. "Estudos de fluorescencia em organo-gel". reponame:Repositório Institucional da UFSC, 1997. http://repositorio.ufsc.br/xmlui/handle/123456789/77292.
Texto completo da fonteMade available in DSpace on 2012-10-17T02:43:19Z (GMT). No. of bitstreams: 0Bitstream added on 2016-01-08T22:10:57Z : No. of bitstreams: 1 108505.pdf: 4374309 bytes, checksum: 42d56672e07bc8fcea4f4cd27ccd2f52 (MD5)
Um novo campo de estudo tem sido aberto com a solubilização de gelatina em microemulsão água em óleo. O sistema MBG é formado por Aerosol-OT, água e solvente orgânico, e este possui a vantagem de se obter géis hidrofóbicos transparentes com a viscosidade variando de líquido a verdadeiros géis consistentes. Este trabatho teve o objetivo de estudar a transição sol-gel através de medidas de fluorescência, tempo de vida e medidas de supressão, usando uma sonda hidrofóbica (pireno). Através da análise da intensidade de fluorescência das várias estruturas finas vibracionais (razão III/I) do monômero do pireno, é possível obter informações sobre o microambiente no qual ele se encontra. As medidas de fluorescência foram realizadas em sistemas de organo-gel de n-hexano, n-heptano e ciclo-hexano, com composições diferentes de água, surfactante e gelatina, tanto em sistema micelar líquido, como em gel homogêneo e transparente. Os resultados obtidos para a razão III/I em função e W0 (W0 = H2O/AOT) e percentagem de gelatina, mostraram uma mudança acentuada na transição sol-gel no sistema MBG. Nas medidas de supressão do pireno por brometo de N-etilpiridínio não foram observadas mudanças no espectro de fluorescência. Nas medidas de tempo de relaxação, observou-se que a sonda está localizada preferencialmente na fase orgânica para os sistemas de organo-gel de n-hexano e n-heptano, e que ocorre um particionamento maior em sistema de ciclo-hexano. Portanto, através destas técnicas, é possível estudar a transição sol-gel, além de obter novas informações sobre a sua microestrutura .
Birepinte, Mélodie. "Amino(organo)boranes, synthèse et propriétés". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0231.
Texto completo da fonteThis manuscript presents the synthesis, reactivity and properties of amino(organo)boranes. The diisopropylaminoborane has been used for the formation of carbon-boron bonds. Its reactivity as a borylating agent was first explored for the hydroboration of alkynes catalyzed by Schwartz reageant. A large variety of alkenylaminoboranes, -boronates and -diazaborolanes was thus synthesized. Their stereoselective transformation into E and Z bromoalkenes was also optimized. The borylation of terminal alkynes via a tandem process of dehydrogenation/ dehydrogenative coupling allowed the access to a large scope of alkynylaminoboranes. Finally, the different reactivities of aminoboranes were used for the preparation of borinic acids bearing a phosphine group but also of a new class of chiral boron derivatives via a C-B atropisomerism. These chiral aminoarylboranes were fully characterized after separating the enantiomers and running spectroscopic analyses and racemization studies
Drury, Christopher John. "Nucleophilic substitution and cyclisation reactions of some polyfluoro-heteroaromatic and polyfluoroaromatic compounds". Thesis, Durham University, 1994. http://etheses.dur.ac.uk/5845/.
Texto completo da fonteCANNIZZARO, DIEGO. "La musica per organo e clavicembalo nei regni di Napoli e di Sicilia tra XVI e XVII secolo". Doctoral thesis, La Sapienza, 2005. http://hdl.handle.net/11573/917444.
Texto completo da fonteBendjelid, Abed. "L'organisation urbaine des bassins intérieurs oranais (Algérie) : formation et fonctionnement d'un réseau urbain dans un pays à économie planifiée". Paris 1, 1990. http://www.theses.fr/1990PA010507.
Texto completo da fonteThis is an analysis of town planning in an inland area of Algeria; which is noted in the general process of urban growth found in the country. In the algerian development situation, the state in the main agent in town planning. The first part out lines the important characteristincs of present urban organization in the inland plains of the Oran region, a combination of small and medium sized townships; while the second part studies the principal changes concerning activities and employment, showing the new spatial migratory patterns experienced. Next, the last section is devoted to approach of territorial strategies and spatial drives. Conflicting interests between state and private participants are clearly brought out in the spatial tactics. Finally, the conclusion considers the general reorganization in the region after twenty years of national planning
Issad, Faïza. "L'abandon scolaire féminin dans le second degré : le cas de la ville d'Oran". Paris 5, 1987. http://www.theses.fr/1987PA05H099.
Texto completo da fonteGuessab, Slimane. "L'importance et la signification de l'absentéisme chez les ouvriers algériens : le cas de l'entreprise nationale de sidérurgie d'Oran". Bordeaux 2, 1986. http://www.theses.fr/1986BOR21005.
Texto completo da fonteGilles, Maren. "Sorptionsverhalten organo-mineralischer Bodenbestandteile gegenüber umweltrelevanten Radionukliden". [S.l. : s.n.], 1998. http://deposit.ddb.de/cgi-bin/dokserv?idn=956297064.
Texto completo da fonteFrazier, Joy Faith. "Organo-iridium compounds : synthesis, characterization and reactivity /". Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08222009-040309/.
Texto completo da fonteComina, Paul John. "New methodology in organo-chromium/-silicon chemistry". Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320585.
Texto completo da fonteWilliamson, Craig. "Imidazolylidenes in N-heterocyclic carbene organo-catalysis". Thesis, University of Aberdeen, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440601.
Texto completo da fonteBelt, S. T. "Intermediates and mechanisms in organo-rhodium photochemistry". Thesis, University of York, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234935.
Texto completo da fonteLacey, I. N. "Antiwear behaviour of organo-phosphorous (III) ester". Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37749.
Texto completo da fonteMallik, Sanku. "Chemistry of enolates on organo-molybdenum complexes". Case Western Reserve University School of Graduate Studies / OhioLINK, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=case1059759899.
Texto completo da fonteDhaher, S. M. "Sterically hindered organo-phosphorus and -tin compounds". Thesis, University of Sussex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374457.
Texto completo da fonteEl-Kheli, M. N. A. "Sterically hindered organo-boron and -cadmium compounds". Thesis, University of Sussex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356502.
Texto completo da fonteRowley, Michael. "Some uses of tin compounds in organic synthesis". Thesis, University of Cambridge, 1986. https://www.repository.cam.ac.uk/handle/1810/265341.
Texto completo da fonteJones, Craig Warren. "Nucleophilic aromatic substitution using supported copper(I) reagents". Thesis, University of York, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236184.
Texto completo da fonteBell, Michael Niall. "Organometallic platinum group metal complexes incorporating macrocyclic ligands". Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/13895.
Texto completo da fonteConole, Grainne. "Structural studies of polynuclear metal carbonyl derivatives". Thesis, London Metropolitan University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.290436.
Texto completo da fonteGuy, Franck. "Variabilité de l'appareil manducateur chez les hominoidea (mammalia, primates) actuels". Poitiers, 2001. http://www.theses.fr/2001POIT2284.
Texto completo da fonteBégaud, Caroline. "La troisieme republique francaise coloniale en algerie. Pour une histoire politique d'oran de 1930 a 1939". Paris 8, 1999. http://www.theses.fr/1999PA081616.
Texto completo da fonteBendraoua, Fouzia. "Dynamique urbaine, instruments d'urbanisme et réalité terrain du groupement urbain d'Oran (Algérie) : création d'un SIG et imagerie spatiale". Marne-la-Vallée, 2005. http://www.theses.fr/2005MARN0274.
Texto completo da fonteTaddei, Fabio. "Rilevamento geologico della valle di Ortano, Elba orientale". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2022.
Encontre o texto completo da fonteHamer, Julian C. E. "Organo-iron compounds on clays and pillared clays". Thesis, Sheffield Hallam University, 1998. http://shura.shu.ac.uk/19748/.
Texto completo da fonteNeedham, Russell James. "Organo-osmium anticancer complexes with novel azo-ligands". Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/88273/.
Texto completo da fonteSartor, Valérie. "Synthèse de dendrimères polyallyles par voie organo-fer". Bordeaux 1, 1998. http://www.theses.fr/1998BOR10586.
Texto completo da fonte