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Bergman, Malin, and Beatrice Dinu. "Original Copies." Thesis, KTH, Arkitektur, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223235.
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This thesis aims to investigate copying in architecture in relation to context. Is it possible to copy a building?With the advances of 3D-scanning and digital fabrication, the possibilities for copying form and material are constantly increasing. However, more so than the artistic object, architecture is always contextual - a building exists on a specific site. Therefore, when investigating copies in architecture, context becomes crucial. How does context change the specifics of the building?While studying the copy in relation to context and the adaptations, the relation between the original and the copy is highlighted. At what point does the copy detach itself from the original? Is there a copy or just multiple originals?In relation to these questions, there are several issues that surface, that might be defined by studying the subject. What is architecture? What is a building? What makes a building a piece of architecture? Who has authorship over a piece of architecture? And most importantly: where in a building lies the originality?
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Herbert, Flora. "L'estampe et ses transferts : gravures françaises et copies allemandes (1650-1750)." Thesis, Paris 4, 2017. http://www.theses.fr/2017PA040065.
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Cette thèse de doctorat propose une réflexion sur les phénomènes de copies en matière d’estampe à travers la production d’éditeurs-graveurs allemands de la seconde moitié du XVIIe siècle et de la première moitié du siècle suivant. Parmi les principaux acteurs du monde de la gravure en Allemagne après la fin de la guerre de Trente ans, certains, à commencer par la famille des Küsel à Augsbourg, se sont largement investis dans la réalisation et l’édition de copies gravées. Parmi les modèles utilisés par ces graveurs, l’estampe française du XVIIe siècle tient une place centrale. Remises dans leur contexte historique, technique et artistique, ces copies permettent d’aborder un rapport à la reproduction et diffusion des images différent d’aujourd’hui. Trois niveaux de transferts sont dans ce cadre interrogés. Le premier se réfère à la pratique même du copiste, qui transfère son modèle sur une plaque à graver. Le deuxième niveau de transfert concerne plus spécifiquement les translations qui s’opèrent d’un pays à un autre. Enfin, le troisième interroge la manière dont le désir de s’approprier l’original se reporte sur la copie. Il s’agit ainsi de replacer ces phénomènes de copies dans leurs contextes de production respectifs mais aussi d’étudier ce qu’implique cette pratique, tout en tenant compte pour cela du rôle joué par son publicThis doctoral thesis presents a study of the phenomenon of print copying, study based on the production of German publishers and engravers in the second half of the seventeenth century and the first half of the following century. Some of the main producers of engravings in Germany after the end of the Thirty Years War, starting with the Küsel family in Augsburg, were very much involved in creating and publishing engraved copies. The French seventeenth century printing was a central element in the models used by these engravers. When these copies are placed in their historical, technical and artistic background, they enable us to address a different way of looking at the copying and publishing of pictures, compared withtoday. We shall, therefore, analyze three levels of transfers. The first one relates to the actual technique of the copyist who transfers the model onto an engraving plate. The second one focuses more specifically on the exchanges generated from one country to another. Finally, the third one raises the issue of how the desire to appropriate the original is transferred onto the copy. We shall thus place these phenomena of print copies in their respective backgrounds but also analyze what is implied by this practice, taking into account the role played by its audience
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Michaud, Alyssa R. ""Copies without Originals": Manipulation, Mediation, and Mediatization in Performance and Recording Practices." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23605.
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This thesis examines case studies and historical accounts taken from different periods of the history of recording technology, and addresses questions concerning the impact of mediatization, manipulation, and mediation on listeners' and performers' approaches to music. The project considers the development of the idea of "copies without originals," and of the ideological frameworks that have been used to describe and classify recorded sound. The first case study covers the early days of the phonograph and its development in Victorian society, then contrasts the values and motivations of those early years with modern-day rock performance and its own value systems. Moving into the mid-twentieth century, a chapter of this thesis is devoted to the work of Glenn Gould, and the possibilities for tape manipulation that the Canadian pianist explored during the period of his career that was focused on the recording studio. Lastly, this project examines the innovative, user-driven methods of music-making that are gaining momentum today, including Bjork's "Biophilia" app album, and the emergence of a new genre of popular music in Asia that uses vocal synthesizers in place of live performers. By exploring these case studies alongside the works of scholars in musicology, media studies, sound theory, film and television, and popular music studies, this thesis demonstrates how cultural need, individual innovation, and social involvement interact to direct the development and application of emerging media technologies.
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Myers, Lynn B. "The origins and nature of the repressive coping style." Thesis, King's College London (University of London), 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263521.
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Joost, Maximilian. "Synthesis and original reactivity of copper and gold complexes : sigma-Bond coordination, oxidative addition, migratory insertion." Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2413/.
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Ce manuscrit porte sur l'étude de la chimie de coordination et de nouvelles réactivités de complexes du cuivre et de l'or. Plus particulièrement, le travail ici présenté avait pour objectif d'approfondir nos connaissances de deux procédés clés de la chimie organométallique rarement observées dans le cas du cuivre et de l'or : (i) l'activation de liaisons s et (ii) l'insertion migratoire. La première partie de ce manuscrit est dédiée à l'étude de la coordination de liaisons s-SiH sur le cuivre. En tirant profit de la stratégie de l'assistance chélate, nous avons synthétisé des complexes de cuivre avec des ligands diphosphino-hydrosilane (R2P(o-C6H4))2Si(R')H. Cette étude nous a permis de mettre en évidence grâce à des moyens expérimentaux (RMN, IR, diffraction RX) et théoriques (optimisation de géométrie, analyse NBO) une coordination ?2-SiH faible sur le cuivre. Cette coordination est essentiellement dominée par une donation de densité électronique de la liaison SiH vers le cuivre sans rétrodonation significative. Dans la deuxième partie, nous avons étudié la réactivité des complexes silyles d'or vis-à-vis des substrats organiques insaturés. Nous avons montré que des alcynes et des allènes réagissent avec des complexes silyles d'or(I) pour former des complexes bêta-silyle vinyle d'or par un processus original d'insertion migratoire syn dans la liaison AuSi. Un mécanisme du type coordination-insertion pour cette transformation unique dans la chimie de de l'or est proposé sur la base des études cinétiques et théoriques. Dans la troisième partie, l'addition oxydante intermoléculaire de liaisons s-SiSi, s-CC et s-CX (X=halogène) à des complexes moléculaires d'or(I) a été étudié. Nous avons pu montrer que ce processus, considéré comme impossible avec l'or, était en fait très favorable avec un ligand judicieusement choisi. Certains complexes monophosphines d'or cationiques sont actifs vis-à-vis de l'addition oxydante de certains disilanes, mais les complexes bis(silyle) d'or(III) ainsi générés se sont avérés très instables. En revanche, l'utilisation de complexes bis(phosphine) d'or(I) possédant un angle de morsure faible permettent pour la première fois l'addition oxydante spontanée de liaisons s-CC et s-CX ainsi que la stabilisation des complexes d'or(III) correspondants. Ces derniers ont pu être caractérisés spectroscopiquement et structuralement. Ces résultats montrent une réactivité inattendue pour des complexes d'or et semblent d'être prometteurs pour des nouvelles réactions catalysées à l'orThe present work is a study concerning the coordination chemistry and reactivity of copper and gold complexes. Of particular interest was the elucidation of (i) the metal-mediated activation of s-bonds and (ii) the migratory insertion reaction. Both processes are of considerable importance in organometallic chemistry, but elusive for copper and gold. The first part of this manuscript is dedicated to the study of the coordination of s-SiH bonds to copper. By means of a chelate assistance approach, we synthesized copper complexes employing diphosphino-hydrosilane ligands (R2P(o-C6H4))2Si(R')H. This study allowed for the identification of a weak ?2-SiH coordination to copper that has been evidenced by experimental (NMR, IR, XRD) and computational (geometry optimization, NBO analysis) means. The s-SiH coordination is essentially dominated by donation of electron density from the hydrosilane moiety to copper, without significant backdonation. In the second part, we investigated the reactivity of silylgold(I) complexes towards unsaturated organic molecules. We showed that these complexes react with alkynes and allenes to yield (Beta-silyl)vinylgold complexes via migratory syn insertion into the gold-silicon bond. A mechanistic proposal consisting of a 2-step coordination insertion process was established for this transformation by means of a kinetic and computational study. In the third part, the intermolecular oxidative addition of s-SiSi, s-CC and s-CX (X=halogen) bonds with molecular gold(I) complexes was studied in detail. We showed that this reaction, usually considered to be impossible for gold, is actually highly favored, provided an adequate ligand is employed. Disilanes add to cationic monophosphine gold(I) complexes. However, the corresponding bis(silyl)gold(III) products are highly unstable. The use of bis(phosphine) gold(I) complexes, featuring a bidentate ligand with a small bite-angle, allowed for the first time for the oxidative addition of s-CC and s-CX bonds at gold(I) and proved key for the stabilization of the corresponding gold(III) products that were characterized by spectroscopic and structural means. These results shed light on an unexpected reactivity pattern of gold complexes and may be an entry point to 2-electron redox transformations mediated by this metal, opening up new perspectives in gold catalysis
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Helal, Ibrahim Fahmy. "Les origines pharaoniques du mariage copte : contribution à l'histoire du droit matrimonial égyptien." Perpignan, 1995. http://www.theses.fr/1995PERP0197.
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Le mariage égyptien est resté le même, dans son ensemble, depuis le temps pharaonique, à travers l'ancien, le moyen, le nouvel empires et la basse époque, aussi à travers la periode perse, ptolémaique, romaine et arabe. . . Jusqu'a nos jours chez les coptes - descendants des pharaons - sur la base de l'unicité de ce peuple "un". Il est une union sacrée de l'âme et du corps, entre un homme et une femme conclue par devant le saint des saints par écrit et par le ministère d'un notaire, qui est un prêtre, en vue de la formation d'une famille et en présence des témoins et des prochesThe egyptian marriage, is still the same, since the pharaonic times, through the ancient, the middle, the new kingdoms and the late period, also through the persian, ptolmaic, roman and arabic periode. . . Till nowadays, between the copts descendants of pharaos, upon the base of "unity of that people". This marriage was and still a sacred union for the spirit and corpus, between a man and a woman held in front of the holy of holies, by writing and by the hand of a notary priest for forming a family in the presence of witnesses and relatives
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Banks, D. A. "On the origin of the Tynagh lead + zinc + copper deposit, Ireland." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382386.
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McGowan, Ross. "The origin of the Nchanga copper-cobalt deposits of the Zambian copperbelt." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/402419/.
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Hafer, Mark R. "Origin and controls of deposition of the Wheal Hughes and Poona copper deposits, Moonta, South Australia /." Title page, table of contents and abstract only, 1991. http://web4.library.adelaide.edu.au/thesis/09SB/09sbh138.pdf.
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Thesis (B. Sc.(Hons))--University of Adelaide, Dept. of Geology and Geophysics, 1992.Two charts in pocket. National grid reference: Maitland sheet 1-53/12 (1:253 440). Includes bibliographical references.
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Chen, Wei, and 陈伟. "Origin and tectonic environment of the Lala Fe-Cu-(Mo, REE) deposit, Sichuan province, SW China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/197093.
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The Hekou Group in the Kangdian region, SW Yangtze Block is a metavolcanic-metasedimentary succession hosting the giant Lala Fe-Cu-(Mo, REE) deposit. Mafic volcanic rocks of the Hekou Group and nearby gabbroic intrusions have identical zircon U-Pb ages of ~1700 Ma. The sedimentary and mafic rocks are suggested to have formed in an intra-continental rift, similar to those of the North Australian Craton. Such a similarity suggests that the Yangtze Block was likely linked with the North Australian Craton in the Columbia supercontinent during late Paleoproterozoic.
Overlying the Hekou Group is a thick sedimentary sequence of the Julin Group containing basaltic layers with zircon U-Pb ages of ~1050 Ma. The basalts and other coeval igneous rocks in the region have geochemical affinity of within-plate rocks, representing a ~1.05-1.1 Ga rifting event. Occurrence of the within-plate rocks does not support existence of a Grenvillian orogenic belt in the region, and thus agrues against previous hypothesis that proposed the Yangtze Block to be located in the interior of the Rodinia supercontinent on the basis of the so-called Grenvillian orogenic belt.
The Lala deposit contains 200 Mt of ores with an average grade of 13 wt.% Fe, 0.92 wt.% Cu, 0.018 wt.% Mo, 0.022 wt.% Co, 0.25 wt.% REE2O3 and 0.16 ppm Au, and is one of the largest IOCG deposits in the region. The ores are hosted mostly in meta-vocalnic rocks (albitite) and schists, and are characterized by abundant low-Ti magnetite with subordinate chalcopyrite, pyrite, molybdenite and REE minerals. The paragenetic sequence includes Stage I of Na-alteration, Stage II of Fe mineralization, Stage III of Cu-Mo-REE mineralization, Stage IV of chalcopyrite-pyrite-calcite veins and Stage V of hematite-calcite-quartz veins. Molybdenite of Stage III has a Re-Os isotopic age of 1086 ± 8 Ma, similar to U-Pb ages of the primary allanite as 1067 ± 41 Ma, suggesting that mineralization of the Lala deposit is coeval with the ~1.05-1.1 Ga within-plate magmatism in the region. The secondary allanite has U-Pb ages of 880-850 Ma, comparable to Ar-Ar and Pb-Pb ages of undeformed Stage IV and V veins, representing a younger hydrothermal event.
C-O-S isotopes suggest that the Fe and Cu mineralization stages (II and III) at Lala have formed from high temperature magmatic-hydrothermal fluids (385-430ºC). However, compositions of fluid inclusions and minerals demonstrate that the Fe and Cu mineralizing fluids have different compositions. Strontium isotopic compositions of apatite and calcite suggest that the Fe mineralizing fluid has formed from magmatic fluids interacted with late Paleoproterozoic host rocks, whereas the Cu mineralizing fluid with much higher 87Sr/86Sr ratios has possibly involved magmatic fluids that have interacted with older basement beneath. Close association of monazite-bearing apatite, Cu-sulfides and REE-minerals at Lala suggests that REE mobilization and mineralization is genetically related to the Cu mineralizing fluid. This study suggests that the Cu mineralizing fluid contains Cl-, K, CO2, F-, PO43- and CO32- with low Na activity, and is thus responsible for mobilization, transportation and deposition of LREEs in the Lala deposit.published_or_final_version
Earth Sciences
Doctoral
Doctor of Philosophy
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Carraro, Natasha Olga Norina. "Looking Back and Moving Forward: A Meta-Analytic Review and Two Original Studies Examining the Role of Action Planning and Coping Planning in Promoting Physical Activity Behaviour." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32096.
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Physical activity (PA) offers numerous physical and mental health benefits. Unfortunately, most people struggle to lead an active lifestyle, particularly when they are concurrently striving to balance other pursuits that may interfere with their engagement in PA. The self-regulatory strategies of action planning (AP) and coping planning (CP) have been proposed as a means of helping people initiate and maintain PA, though inconsistent findings have been observed to this effect. The primary objectives of the present dissertation, achieved by way of two original articles, were to (a) review the extant planning for PA literature in order to summarize and synthesize knowledge in the area to date, and (b) examine AP and CP in relation to more than one goal at a time, while testing the relevant moderator of academic goal conflict. The first article comprised a meta-analysis of correlational (k = 19) and experimental (k = 21) studies on planning for PA, which revealed a medium-to-large summary effect for correlational studies, and a small summary effect for experimental studies. Furthermore, AP and CP emerged as partial mediators in the relation between behavioural intention and PA. Numerous moderators were also found. Among other key findings, this article cast light on the fact that, despite multiple goal pursuit being the rule rather than the exception, most studies reviewed examined a single goal in isolation. Further, the summary effects found were more modest than expected and highly heterogeneous, pointing to the value to testing relevant moderators. Thus, the second article contained two studies that examined the moderating role of academic goal conflict on the relations between AP and CP with PA using samples of university students concurrently pursuing an academic and a PA goal. Study 1 (N = 317) used a 6-week prospective design, and Study 2 (N = 97) used a 1-week daily diary design and measures of self-reported PA behaviour and goal progress. Across both studies, it was found that academic goal conflict moderated the influence of planning on PA outcomes. AP and CP were found to play differential roles in predicting PA when students were experiencing goal conflict: AP related to better PA outcomes at lower levels of academic goal conflict, whereas CP related to better PA outcomes at higher levels of academic goal conflict. These two self-regulatory strategies appear to play a different, yet complementary role in the goal pursuit process. Overall, the present dissertation contributes to knowledge synthesis in the area of planning for PA. In addition, novel research findings are presented which specifically target identified gaps in the literature. Theoretical, methodological, and practical implications are discussed, and future research avenues are proposed.
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Schroeder, Janina Fee [Verfasser]. "Relationship Conflicts in Changing Business Families in India and Germany : Origins, Fields, and Coping Strategies / Janina Fee Schroeder." Göttingen : Vandenhoeck & Ruprecht, V&R unipress, 2017. http://d-nb.info/1140503138/34.
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Caromba, Laurence Joseph. "The origins of liberal conservatism : Edmund Burke, Adam Smith, and the art of coping with a complex society." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/25682.
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This study compares and contrasts the writings of Edmund Burke and Adam Smith, to determine whether they are contradictory, compatible, or complementary. Burke can be regarded as the founder of modern conservatism, and Smith is an early and powerful advocate of market-orientated liberalism. Today, their ideas have been blended into a system of “liberal conservatism” that serves as the unofficial political ideology of most right-of centre parties throughout the English-speaking world. However, it is not so immediately apparent that Smith and Burke can be reconciled with each other. In the course of this study, Burke and Smith’s ideas are considered at various levels of abstraction. They share a nuanced view of human beings as complex, social, sympathetic and self-interested. They both adhere to an empiricist epistemology that is distrustful of deductive rationality, especially when applied to complex human societies. In order to cope with this complexity, Burke and Smith alike counsel humility and pragmatism, and emphasise the importance of contingency. Furthermore, they suggest that policymakers rely on mechanisms that reveal information held by large numbers of individuals: tradition in the case of Burke, and the market mechanism in the case of Smith. Burke is a staunch opponent of arbitrary power, and an advocate of colonial liberty. However, he defends the prescriptive powers of the state, and argues that liberty should be tempered by self-restraint. Smith advocates a “system of natural liberty” in economic affairs, but acknowledges that such a system takes place within the framework of a coercive state. In terms of policy, Burke and Smith share similar views on external free trade and laissez-faire within the domestic economy, but there are important stylistic and substantive differences in their views on the relief of the poor. Ultimately, this study argues that Burke and Smith’s complementary policymaking framework, rather than their actual views on policy, is the true point of convergence between them.Dissertation (MA)--University of Pretoria, 2012.
Political Sciences
unrestricted
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Allaire, Ted D., R. Lillie Macias, and Julia L. Perilla. "Effects of Country of Origin and Cognitive Development on Psychological Adjustment and Family Cohesion of Latino Youth Witnesses of Domestic Violence." Digital Archive @ GSU, 2012. http://digitalarchive.gsu.edu/honors_theses/11.
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Latino children living in the context of domestic violence (DV) often lack access to cultural-specific services. The purpose of this study was to examine the relationship among Latino children’s level of cognitive development (age), country of origin and psychological adjustment as well as styles of coping with domestic violence . Analysis of data collected from an interview conducted with Latino children at a local DV intervention program suggests that Latino children utilize a range of coping responses when confronted with violence in their homes. In a regression analysis using psychological adjustment as the dependent variable, developmental age was not related to adjustment in children. However, country of origin was a significant predictor of psychological adjustment. That is, immigrant children reported lower levels of psychological adjustment compared to children born in the U.S. This remained true while controlling for age, coping strategy, and family cohesion. The growing number of immigrant Latino children in the United States increases the need for culturally relevant research with racial and ethnic minority groups in regard to DV. These findings suggest immigrant Latino children have unique needs in the context of DV.
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Hall, Jonathan. "Migration and Perceptions of War : Simultaneous Surveys in Countries of Origin and Settlement." Doctoral thesis, Uppsala universitet, Institutionen för freds- och konfliktforskning, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-198766.
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This dissertation contributes to post-war public opinion research by examining the perceptions of migrants – the gastarbeiter, the refugee, the family reunited after war – and the local population in comparative perspective. Existing surveys of post-war populations are typically conducted in a single country affected by war. However, particularly following forced expulsion and campaigns of ethnic cleansing substantial portions of national communities affected by conflict no longer live within the boundaries of the state. Current research may therefore overlook important populations as well as contextual factors that shape post-war attitudes. I help to address this problem by examining three widely held assumptions in the literature: that migrants hold more conflictive attitudes than the local population after war; that assimilation in settlement countries leads migrants to hold more peaceful attitudes; and that traumatic experiences lead migrants to hold more conflictive attitudes. These claims are largely based on theoretical accounts, case studies that suffer from selection bias and quantitative results that have proven unstable. By contrast, I examine new micro-level data: two large-scale surveys conducted simultaneously in post-war Bosnia and Sweden as a settlement country. Sweden’s choice to grant permanent residency in toto to refugees from the Bosnian War in 1993 resulted in the vast majority remaining settled in Sweden. As a result, the population of ex-Yugoslavs in Sweden is arguably more representative than in other comparable settlement country contexts. To explain differences among ex-Yugoslavs in Sweden and between these migrants and the local population in Bosnia, I connect social-psychological processes that help meet individuals’ basic psychological needs. These include: belief formation in the context of war; acculturation strategies in settlement countries; the development of nostalgic memories; and coping with traumatic experiences. The findings shed light on largely misunderstood processes. Under certain conditions, migration may provide an exit from detrimental wartime and post-war settings that produce and sustain conflictive societal beliefs after war. At the same time, the migration context may provide a richer set of socioeconomic and psychological resources for coping, offsetting the need to rely on conflictive beliefs as a way of dealing with the conflict crisis.
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Hudgins, Carter Christian. "Elizabethan industries in Jacobean Virginia? : an examination of the industrial origins and metallurgical functions of scrap copper at early Jamestown (c. 1607 - 1610)." Thesis, Royal Holloway, University of London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607168.
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Tomlinson, David Harris. "Nature and Origin of Fissure Ore at the Porphyry-Epithermal Transition Zone of the Bingham Canyon Porphyry Cu-Au-Mo Deposit, Utah." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7544.
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Late-stage fissure-filling ore at the world class Bingham Canyon, Utah, porphyry copper deposit has long been recognized, but poorly studied. Physical and chemical characterization of the Pb-Zn-Cu-Ag-Au mineralized fissures in the porphyry-epithermal transition zone provides insight into the origin, timing, and controls of ore deposition. These sheared sulfide-rich fissures are dominated by pyrite and multiple generations of quartz, with lesser amounts of other sulfides and gangue minerals. Au (0.27 to 4.61 ppm) provides the most value to the ore in the transition zone. Host rocks include Eocene monzonite and Paleozoic limestone and quartzite"”all of which can contain economic ore bodies. Associated alteration is predominantly sericitic and argillic. Mineralization into the wall rocks is restricted, not exceeding 1.5 m from the fissure margins. Mineral assemblages vary with distance from the center of the main Cu-Mo deposit and the modal abundances are dependent on host rock. The appearance of both galena and sphalerite (and tennantite to an extent) mark the transition from a porphyry to an epithermal environment. This is accompanied by an increased concentration of chalcophile trace elements in sulfides as determined by EMPA and LA-ICP-MS. Significant hosts of Ag include galena and tennantite, while Cu is hosted primarily in chalcopyrite, tennantite, and sphalerite. Gold does not appear to be hosted in solid solution, but may be focused along fractures or inclusions in pyrite. δ3434S values of fissure pyrite has a narrow range (+2.3 to 3.4‰), while δ18O of quartz is more variable and high (+11.5 to 14.0‰) relative to typical hydrothermal quartz. This can be explained by increased fractionation at lower temperatures in the magmatic fluids, which could have additionally mixed with exchanged 18O-rich meteoric water. Ore grades improve with distance from the center of the deposit; however, this is accompanied by higher concentrations of elements (Pb, As, Bi, etc.) undesirable for downstream processing. The mineralized fissures were created sequentially throughout the formation of the deposit. Initial joints probably formed as a result of the intrusion of a barren equigranular monzonite. The NE orientation of the joints was controlled by the regional stress field, which is more apparent distal to the center of the deposit. A quartz monzonite porphyry then intruded, dilating the joints to allow precipitation of quartz and then pyrite during the Cu-Au-stage of mineralization in the main ore body. After dike-like intrusions of latite porphyry and quartz latite porphyry intruded, galena, sphalerite, and pyrite precipitated to form the Pb-Zn-Ag mineralization. This was followed by late precipitation of chalcopyrite and tennantite (and likely Au mineralization).
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Tisseraud, Céline. "Origine et impact de la synergie Cu-ZnO sur l'hydrogénation catalytique du CO2 en méthanol." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2295/document.
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L’hydrogénation catalytique du CO2 est considérée comme l’une des voies de valorisation les plus prometteuses pour la production du méthanol. Cette synthèse, souvent accompagné par une formation de CO, a fait l’objet de nombreuses études dans la littérature. Cependant, les résultats obtenus sur des catalyseurs à base de Cu et de ZnO ont démontré que cette réaction n’est pas aussi simple qu’elle y paraissait. Il y a encore beaucoup de controverses et d’interrogations sur la nature des sites actifs et sur les différentes étapes réactionnelles mises en jeu lors de la réaction. L’objectif de ce travail est d’apporter des éléments de compréhension sur la nature des sites actifs et leur rôle sur l’activation du CO2 et de H2. L’étude sur des catalyseurs modèles (mélanges mécaniques et matériaux préparés par coprécipitation) a permis de mettre en évidence un effet de synergie entre Cu et ZnO lié à des phénomènes de migration. Ce travail a montré que la production de méthanol est étroitement liée à la création d’une phase oxyde de type CuxZn(1-x)Oy (lacunaire en oxygène) induit par un effet de Kirkendall à l’interface Cu-ZnO, favorisant l’épandage de l’hydrogène. Différents modèles mathématiques ont été développés afin de déterminer la concentration des contacts entre Cu et ZnO. Les résultats obtenus ont démontré qu’il est possible de corréler directement l’activité du catalyseur avec la concentration de contacts et que cela peut permettre ainsi de prédire la composition chimique idéale du catalyseur pour un design de matériau donné. L’expertise complète de la relation design-activité a permis le développement de matériaux Cu-ZnO de type cœur-coquille 100% sélectif en méthanolThe catalytic CO2 hydrogenation is considered to be one of the most promising methods for methanol production. This synthesis, often accompanied by a CO formation, had been the subject of many studies in the literature. However, the results obtained on Cu and ZnO based catalysts demonstrated that the reaction is not as simple as it appear to be. There is still a lot of controversies and interrogations concerning the nature of the active sites and the different reactional steps involved during the reaction. The objective of this work is a better understanding of the nature of the active sites and their role on CO2 an H2 activation. A study on model catalysts (mechanical mixtures and materials prepared by coprecipitation) allowed to demonstrate that the synergetic effect between Cu and ZnO linked to a migration phenomenon. This work showed that the methanol production was closely linked to the CuxZn(1-x)Oy oxide phase creation (with oxygen vacancies) induced by a Kirkendall effect on Cu-ZnO interface, thereby promoting the hydrogen spillover. Different mathematical models were developed to determine the concentration of contacts between Cu and ZnO. The results obtained demonstrated that it is possible to directly correlate the catalyst’s activity with the concentration of contacts between Cu and ZnO, which in turn allowed predicting optimal catalyst chemical composition for a particular design of a material. The full expertise of the design-activity relationship allowed the development of Cu-ZnO core-shell type materials with a 100% selective to methanol
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ANTHONY, ELIZABETH YOUNGBLOOD. "GEOCHEMICAL EVIDENCE FOR CRUSTAL MELTING IN THE ORIGIN OF THE IGNEOUS SUITE AT THE SIERRITA PORPHYRY COPPER DEPOSIT, SOUTHEASTERN ARIZONA (UNITED STATES, STRONTIUM, PIMA COUNTY, TRACE ELEMENTS, NEODYMIUM)." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/188173.
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Numerical values for parameters which characterize melting regimes and differentiation history have been determined for a suite of genetically-related calc-alkaline rocks. Isotopic ratios of Nd and Sr vary sympathetically, with the least differentiated and oldest rocks having ε(Nd) = -4.3 and ⁸⁷/Sr⁸⁶Srₒ = 0.7069 and the most differentiated and youngest characterized by ε(Nd) = -8.5 and ⁸⁷Sr/⁸⁷/Srₒ = 0.7092. These observations imply that a process which might relate the various units is that of invasion of the crust by mantle-derived magmas and progressive assimilation. The most negative Nd values may well represent the isotopic signature of the crustal rocks which melted. Melting of a 1.8 Ga source region (an age characteristic of the basement in southeastern Arizona) which had a ¹⁴⁷Sm/¹⁴⁴Nd ratio of .13 would yield Laramide melts with and ε(Nd) of -8.5. This Sm/Nd ratio is characteristic of a somewhat mafic (lower?) crust, a character consistent with petrological and chemical evidence which suggest that the source was intermediate to mafic in composition and of amphibolite grade. Solution of the isotopic data yields a value of r (that instantaneous ratio of assimilated material to crystallizing magma) equal to 0.6 to 0.9. These values are reasonable considering heat budgets of crystallization and fusion in the lower crust. Solution of the set of equations for changes in concentration of the trace elements yields numeric values for the f, fraction of remaining melt for each unit in the series. The values are: andesite, f-0.63; granodiorite, f-0.42 to 0.32; and the final granite stocks and dikes, f-0.34. The modeling provides insight into the way an igneous suite intimately associated with copper mineralization has evolved. The porphyry ore bodies are related to long-lived and large magma systems. At the level of mineralization and observation, we sample only a small portion of the system. The importance of subduction to metallogenesis may be that it provides a heat source, in the form of mantle-derived magma, which allows extensive melting of hydrous crust. Thus, as is becoming evident from other studies as well, assimilation and crustal anatexis are major processes in generating granitoid rocks at convergent plate boundaries.
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Butterworth, Andrew D. "The utilisation of layered hydroxysalts in the separation, immobilisation and long term storage of long-lived radio-anions of nuclear power legacy waste origin." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/13639.
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Long lived radioactive species such as ¹²⁹I⁻ and ⁹⁹TcO₄⁻ are formed as by-products of nuclear fission. These species have extremely long half-lives (1.5 million and 211,000 years respectively), are biologically assimilating and due to their anionic nature, can move freely within a geosphere. Historical disposal methods for active species are no longer considered acceptable to the general public and other ways in which to treat the waste are being explored. One remove and concentrate method to remove radioactive species from the biosphere is using alkaline-resistant materials which trap active species that can be encapsulated in a high pH concrete matrix. Layered hydroxides and layered double salts which consist of positively charged layers between which exchangeable anions and water molecules lie are good candidates for these materials due to the basic conditions in which they form. The synthesis, anion exchange properties and stability of copper, lanthanum, nickel and zinc hydroxysalts have been investigated. The structures consist of layers of edge-sharing metal hydroxide octahedra together with an interlayer space containing the anion and in some cases water molecules. Products were characterised by powder X-ray diffraction and vibrational spectroscopy to confirm the identity of structure of the material formed and the anion incorporated. Only Cu2(OH)3(NO3), Cu2(OH)3(OAc).H2O, Ni2(OH)3(NO3) and Zn5(OH)3(NO3).2H2O consistently exhibited exchange capabilities with iodide as the target anion. In terms of exchange rate and efficiency, copper hydroxyacetate is a more suitable precursor as equilibrium is achieved in 10 mins; whereas other LHS containing nitrate as the occupying require longer than 1 day to reach equilibrium. Cu2(OH)3(Ac).H2O has been shown to easily exchange acetate for monovalent anions X- (X = Ha-, NO3-, ClO4-, IO4-, SbO3-, OH-). Exchange reactions with ReO4- (used as a surrogate to TcO4-) and trigonal pyramidal monovalent anions (such as IO3-) were unsuccessful. Exposure to divalent anions (CO32-, Cr2O42-, SeO3-) resulted in no interaction whereas exposure to trivalent PO43- forms Cu3(PO4)2. Quantitative analysis has shown that, contrary to XRPD and FTIR data, full exchange of acetate for an equimolar amount of iodide within a Cu2(OH)3+ framework does not occur with 100% efficiency. Activity counting, gravimetric analysis and ion specific probe analysis suggested that only ~92-93% exchange occurs. The stability of TcO4- and I- analogues with respect to pH has been investigated. Activity counting has shown that even in pH 9.5 solution, 57-73% of 125I- and 99TcO4- immobilised with a Cu2(OH)3+ framework is leached into solution after 16 days. Exposure of Cu2(OH)3I to high carbonate, nitrate and chloride environments shows a progressive loss of iodide into solution as the anionic radius of the incoming anion decreases and the concentration of the incoming anion increases. In the case of chloride and nitrate incoming anions, only a 2:1 chloride to iodide ratio is need for full exchange whereas a ratio of 10:1 nitrate to iodide is required. In situ ion exchange experiments at Diamond allowed the exchange of the hydroxyacetate material to be investigated in flow experiments showing similar facile exchange as demonstrated under batch conditions. Rietveld refinements on deuterated samples of halide analogues of the materials have allowed accurate structure determinations for the first time (Cu2(OD)3Cl - a = 5.726Å, b = 6.125 Å, c = 5.634 Å, β = 93.100°, Cu2(OD)3Br - a = 6.085 Å, b = 6.144 Å, c = 5.650 Å, β = 93.593°, Cu2(OD)3I - a = 6.587 Å, b = 6.179 Å, c = 5.680 Å, β = 95.044°). As the size of the halide increases, the hydroxide coordination alters reflecting to changing sigma/pi donor capability of the halide.
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Mok, Sog Yee [Verfasser]. "Why Do Turkish-Origin Students Underperform in Germany? : Investigating the Effects of Ethnic Composition in Classrooms and Negative Stereotypes on Performance and Coping Strategies / Sog Yee Mok." Konstanz : Bibliothek der Universität Konstanz, 2015. http://d-nb.info/1114886513/34.
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Karila, Delphine. "Etude de la réaction d’esters ω-insaturés médiée par l’iode hypervalent et catalysée par le cuivre : développement d’une nouvelle réaction d’aminolactonisation. Application à la synthèse d’hétérocycles originaux fonctionnalisés." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112228.
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La réaction d’aziridination catalysée par les sels de cuivre permet de former des aziridines à partir d’oléfines en employant une source de nitrènes générée à partir de aryliminoiodanes.Le développement au laboratoire d’une version « one-pot » impliquant l’iodosylbenzène et un sulfonamide ainsi que l’emploi de l’iminoiodane N-Ses a rendu cette réaction plus attractive en synthèse.La première partie de ce travail a été consacrée à l’étude de la réactivité particulière des esters ω-insaturés dans les conditions d’aziridination. En effet, dans ces conditions, l’aziridine subit une ouverture intramoléculaire par le carbonyle de l’ester pour fournir une γ-lactone 5,5-disubstituée. Cette nouvelle réaction, baptisée réaction d’aminolactonisation, a été exemplifiée sur une série de dérivés styréniques 1-propanoates ou butanoates pour donner les γ-lactones correspondantes avec de très bons rendements. Cependant, sans doute pour des raisons stériques, les composés o-bromés et o-chlorés ont donné majoritairement le produit d’aziridination sans évoluer vers la forme lactonique. Par la suite, ces aziridines placées en milieu acide, ont conduit à la formation de γ-lactones ortho halogénées avec de bons rendements. Enfin, le champ d’application de cette méthodologie a été étendu à la formation d’hétérocycles gem-disubstitués, au départ d’alcools oléfiniques et de carbamates insaturés.La seconde partie de ce travail a été consacrée à l’élaboration d’hétérocycles fonctionnalisés à partir des produits issus de la réaction d’aminolactonisation. Ainsi, en exploitant la réactivité de la partie aromatique, il nous a été possible, notamment via des réactions de couplage croisé, d’obtenir différents motifs tels que des spiroindolines, des indolines gem-3,3-disubstituées ou encore des indolinobutyrolactones avec de très bons rendements. Par ailleurs, en usant de la réactivité de certaines γ-lactones, il nous a été possible d’élaborer deux autres motifs relativement intéressants tels qu’une benzospirolactone ou encore un spirohexahydropyrroloindole. Ce dernier composé a fait l’objet d’une étude approfondie dans le cadre de la synthèse d’un analogue spirolactone de la physostigmine, molécule utilisée notamment dans le traitement de la maladie d’Alzheimer.Enfin, dans le cadre d’une approche à la synthèse de la Fiscaline A, possédant un motif indoline 3,3-disubstituée au sein de sa structure, nos efforts se sont concentrés sur la fonctionnalisation de la position C-2 du noyau indoline. L’ensemble des stratégies élaborées a fait l’objet de la troisième partie de ce travail de thèseThe reaction of an olefin with a nitrene generated from a phenyliminoiodane in the presence of a copper catalyst allows the direct formation of an aziridine.The versatility of this reaction was improved by a one-pot procedure developed in our laboratory mediated by iodosylbenzene and a sulfonamide and by the use of Ses iminoiodane. The first part of this thesis was devoted to the study of the unexpected reaction observed with ω-unsaturated esters under aziridination conditions in which an intramolecular ring-opening of the aziridine by the carbonyl oxygen of the ester function is observed providing a 5,5-disubstituted butyrolactone. This new reaction named aminolactonization reaction has been used on various styrene-derived 1-propanoates or butanoates for the synthesis of 5,5-disubstituted butyrolactones in high yields. Probably due to hindrance effects, o-bromo and o-chloro compounds selectively gave the aziridination product. The reactivity of these compounds, under acidic conditions, has been investigated and various ortho halogenated γ-lactones have been obtained in good yields. Finally, the field of application of this methodology has been extended to the formation of gem-disubstituted heterocycles starting from, for example, an olefinic alcohol and an unsaturated carbamate. The second part of this work was dedicated to the elaboration of functionalized heterocycles starting from aminolactonization products. To this end, the reactivity of the aromatic ring has been studied to give access to new scaffolds such as spiroindolines, gem-3,3-disubstituted indolines and indolinobutyrolactones in good yields. Furthermore, the reactivity of such γ-lactones allowed us to synthesize new interesting scaffolds such as benzospirolactone or spirohexahydropyrroloindole. The latter has been used as an intermediate for the synthesis of a spirolactone analogue of physostigmine used for the treatment of Alzheimer’s disease.Finally, this methodology was further exploited for an approach to the total synthesis of Fiscalin A, focusing on the C-2 functionalization of the indoline ring. The results are discussed in the third part of this work
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Reinaud, Olivia. "Nouvelles methodes d'alkylation regioselective d'orthoquinones originales : synthese de differentes classes de produits naturels quinoniques." Paris 6, 1987. http://www.theses.fr/1987PA066200.
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Wanhainen, Christina. "On the origin and evolution of the palaeoproterozoic Aitik Cu-Au-Ag deposit, northern Sweden : a porphyry copper-gold ore, modified by multistage metamorphic-deformational, magmatic-hydrothermal, and IOCG-mineralizing events." Doctoral thesis, Luleå, 2005. http://epubl.luth.se/1402-1544/2005/36.
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El, Marzouki Abdelilah. "Propriétés physicochimiques de complexes du cuivre : modèles synthétiques de la superoxyde dismutase." Grenoble 1, 1993. http://www.theses.fr/1993GRE10140.
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La complexation du cu(ii) et du cu(i) par differentes series de ligands de type macrocycliques, macrobicycliques ou chaine ouverte avec 4,6 ou 8 sites de coordination azotes ou soufres a ete etudiee. Les proprietes physicochimiques des complexes ont ete examinees par differentes methodes spectroscopiques: uv-visible, rpe, rmn. Les caracteristiques electrochimiques de ces complexes ont egalement ete determinees. On met en evidence l'influence de la nature des atomes donneurs et de la taille du ligand. Ainsi, le remplacement d'un atome d'azote par un atome de soufre entraine une augmentation du potentiel redox. Des complexes binucleaires ont ete obtenus avec les deux series de ligands macrocycliques et macrobicycliques cu#2l(cu-im-cu) l et (cu-im-zn) l ou im est l'anion imidazolate. La rpe permet de bien caracteriser la geometrie de ces complexes. On met en evidence la reversibilite de l'obtention des complexes de l'entite (cu-im-cu) en fonction du ph
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Weiss, Jean. "Synthese de (2) et (3)-catenands, coordinats a anneaux entrelaces." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13110.
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Marzak, Saïd. "Complexes du cuivre (i) construits sur le fragment (ms::(4))**(2-) (m=mo,w) : role du ligand thiocyanate dans l'edification de composes heterometalliques a structure infinie." Paris 6, 1988. http://www.theses.fr/1988PA066401.
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Preparation de complexes du type (nr::(4))::(n)(cu::(4)(ncs)::(4)ms::(4)), m=mo, w, r=me, et et n=2 ou 3. Selon la taille du cation, obtention de macrostructures bidimensionnelles ou tridimensionnelles; l'insertion du cation pph::(4)**(+) conduit a la formation d'une structure infinie de chaines lineaires
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Haouas, Ammar. "Cinetique d'oxydation du monoxyde de carbone sur des catalyseurs cuo sno::(2) : etude physicochimique et simulation informatique." Paris 6, 1988. http://www.theses.fr/1988PA066654.
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Etude cinetique de la reaction de co avec l'oxygene moleculaire en regime dynamique permanent. Etude formelle de la cinetique des reactions de type langmuir avec exploitation au moyen d'un logiciel. Determination experimentale des energies d'activation, des ordres partiels et mecanisme reactionnel
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Xiao, Lan. "Etude physico-chimique de la complexation de divers ions metalliques (cu**(2+), ni**(2+) et co**(2+)) avec des dipeptides l-l contenant des chaines laterales non-coordinantes." Paris 7, 1988. http://www.theses.fr/1988PA077170.
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Stabilite des complexes en fonction de l'interaction des chaines laterales du dipeptide et le solvant. Mesures potentiometriques calorimetriques, caracterisation spectrometrique et structure moleculaire
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Faulmann, Christophe. "Conducteurs derives de metaux de transition : complexes moleculaires, polymeres, oxydes de cuivre." Toulouse 3, 1988. http://www.theses.fr/1988TOU30160.
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Chambron, Jean-Claude. "Synthese et etude de complexes du cuivre (i) et du ruthenium (ii) en vue de la separation intramoleculaire des charges photoinduites." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13092.
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Preparation de 2 macrocycles contenant a la fois des sites chelatants diphenyl-2,9 phenanthroline-1,10 et dialkyl-4,4' ou diaryl-4,4' bipyridine-2,2'. Dans le complexe heterodinucleaire il existe une interaction a l'etat excite entre les 2 metaux
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Khan, Mustayeen Ahmed. "Stabilite, spectres electroniques et structures des halogenocuprates en milieu protique." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13059.
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Etude des complexes de cu(ii) dans les solvants protiques l'eau, le methanol et l'acide acetique. On caracterise 4 complexes successsifs; calcul de leurs constantes de stabilite. Etude de l'effet du solvant sur les spectres electroniques
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RIFI, EL HOUSSEINE. "Extraction metallique par des gels hydrophobes." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13158.
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Etude de l'extraction liquide-gel de cu, v et eu. On montre que les lois de la thermodynamique d'extraction de cu par les acyl-4 pyrazolones-5 ne sont pas pertubees par la presence du polymere, mais que la cinetique l'est fortement. L'impregnation des polybutadienes par la trilamylamine presente des difficultes; l'utilisation de pvc gonfle dans des solutions d'oxyde d'octylphenyl n,n-diisobutylcarbamoylmethylphosphine dans tbp est interessante
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Pernot, Etienne. "Relations entre synthèse, structure et conductivité dans Bi4V2O11 et ses substitués (Cu, Ni)." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10178.
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Ce memoire est consacre a la synthese, la structure et la conductivite de bi#4v#2o#1#1 et de ses substitues (cu, ni). La phase haute temperature (gamma) de bi#4v#2o#1#1 est fortement conductrice d'anions oxygene. La substitution partielle du vanadium par le cuivre ou le nickel a tendance a stabiliser cette phase a temperature ambiante. Nous obtenons alors des composes bons conducteurs a basse temperature. La synthese de monocristaux et de poudres a permis de caracteriser avec precision la structure et la conductivite de ces materiaux. Nous avons mis en evidence l'influence des protocoles de synthese sur la symetrie et la conductivite, ainsi que l'existence de transition a cinetique tres lente. Nous avons egalement observe l'anisotropie de la conductivite liee a la structure en couches des materiaux. Les structures des deux phases hautes temperature (beta et gamma) de bi#4v#2o#1#1 ainsi que du compose substitue au cuivre a 12,5% ont ete etudiees par diffraction des rayons x et des neutrons. Cette etude a permis de proposer plusieurs modeles de diffusion microscopique des anions oxygene. Un ordre apparaissant sur les environnements des ions vanadium permet d'expliquer la chute de conductivite lors de la transition de phase gamma beta. L'etude par absorption x au seuil du vanadium montre que son environnement n'est pratiquement pas affecte lors de la substitution par le cuivre. Et nous suggerons que l'augmentation de conductivite par substitution du vanadium provienne essentiellement de phenomenes d'ordre et de desordre sur l'environnement du vanadium
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Delavaux, Béatrice. "Complexes heterobimetalliques hydrures (ru-m) (m=rh,ir,cu) a ligands bisdiphenylphosphinomethane : synthese et reactivite." Toulouse 3, 1986. http://www.theses.fr/1986TOU30078.
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Synthese de complexes hydruro a coordinat dppm : ph::(2) pch::(2) pph::(2). L'etude de la reactivite de certains complexes comme rurhh::(2)cl(cod) (dppm)::(2), conduit a la preparation de nouveaux hydrures dont on etudie les structures
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Metabanzoulou, Jean-Pierre. "Mecanisme de la complexation de l'ion uo : :(2)**(2+) par des di(acyl-4 pyrazolones-5), des ethers-couronnes, des diazapolyoxamacrocycles et des ligands apparentes." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13146.
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Etude spectrophotometrique de la stabilite des complexes de l'ion uo::(2)**(2+) et de l'ion cu**(2+), dans l'eau et eau-acetonitrile. Structures possibles des complexes 1:1, 1:2 et 2:1. Mecanismes de formation des complexes
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Diantouba, Bertin Aimé. "Effets structuraux des acyl-4-pyrazolones-5 dans l'extraction liquide-liquide des cations metalliques divalents." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13093.
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Etude de l'effet de l'acidite de la lipophilie et effets structuraux des acyl-4 pyrazolones-5 dans l'extraction de cu, co, zu et pb divalents. Extraction de 3 types de complexes metalliques : mononucleaires de type m(l-n-lh)::(2) ou m(l-n-l) et polynucleaires (m(l-n-l))::(j). Meilleures possibilites des bis-acyl-4 pyrazolones-5
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Opagiste, Christine. "Synthèse et étude des propriétés magnétiques des composés supraconducteurs surdopés à base de thallium." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10097.
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Cette etude sur les composes supraconducteurs surdopes tl#2ba#2cuo#6##d et tl#2ba#2cacu#2o#8##d concerne leurs syntheses, structures et proprietes magnetiques dans l'etat normal et supraconducteur. La synthese effectuee sous haute pression (100 bar d'oxygene, helium, argon) et a partir du precurseur tl#2ba#2o#5, permet d'eviter les pertes de thallium et la formation de bacuo#2. Concernant la phase tl#2ba#2cuo#6##d, le diagramme de phase (diagramme iso-t#c) a ete etabli dans le plan t#r#e#c#u#i#t, p(o#2). Donnant acces au domaine surdope (t#c variant de 92 a ok), il nous a permis d'etudier les differents domaines de stabilite des deux structures cristallographiques existant pour ce compose. Nous en avons deduit que la structure orthorhombique etait stoechiometrique en cations, alors que la structure tetragonale pouvait presenter un deficit en thallium. De nettes correlations ont ete observees entre t#c et les parametres de mailles pour la phase tl#2ba#2cuo#6##d ainsi que pour la phase tl#2ba#2cacu#2o#8##d dont le surdopage en oxygene a ete realise au moment de la synthese sous un melange helium-oxygene. Les proprietes magnetiques ont ete etudiees par des mesures d'aimantation et de susceptibilite differentielle #'#h. Nous avons constate que la fraction meissner augmentait avec t#c, et que le domaine de reversibilite etait plus etendu pour les echantillons presentant une t#c proche de t#c maximale. Ces observations sont a relier avec la diminution de l'anisotropie de ce systeme avec le surdopage. Dans le domaine reversible, la phase mixte est tres affectee par les fluctuations thermiques autour de t#c. L'analyse des mesures de m(h,t) et de #'#h a permis de suivre l'evolution de #a#b(t) avec t#c. Les resultats obtenus montrent que le compose de dopage optimal (t#c maximale) se comporte comme un supraconducteur de type b. C. S. Le surdopage conduit a un comportement de #a#b(t) difficilement conciliale avec les modeles standards (b. C. S. , deux fluides). Par ailleurs, #a#b(o) obtenue par extrapolation semble peu sensible au surdopage
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Marques, Elizabete. "Proprietes complexantes de nouveaux recepteurs moleculaires : catenands et calixarenes fonctionnalises." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13105.
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Proprietes complexantes des coordinats : cat-30, de son motif constitutif m-30, de dimethyl-2,9 phenanthroline-1. 10 et de di(p-anasyl-)2,9 phenantroline-1. 10, vis a vis de cu**(+), ag, li, zu, cd. On etudie egalement les derives de calixarenes comportant des groupes ester ou cetone sur les o phenoliques-meres
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Nafis, Mohammed. "Etude spectroscopique de l'hypericine et de ses complexes métalliques en relation avec leur activité photodynamique." Grenoble 1, 1993. http://www.theses.fr/1993GRE10117.
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L'hypericine, pigment naturel dont la phototoxicite est remarquable, pourrait etre utilisee en phototherapie. La deprotonation a ph>10 se traduit par un effet bathochrome sur le spectre d'absorption. La complexation par un des cations des metaux (al, gd, tb, fe, cu) dans la region ou se situent les groupes carbonyle et hydroxyle s'accompagne, de maniere analogue, d'un deplacement de ce spectre vers le rouge. Nous avons determine les constantes de formation des complexes metalliques de l'hypericine du type (hyp-m) ou (hyp-m2). Les proprietes spectroscopiques et photophysiques des complexes metalliques de l'hypericine ont ete etudiees en liaison avec leurs proprietes phototoxiques. L'etude cinetique de l'oxydation du 1,3-diphenylisobenzofuranne montre que les complexes metalliques de l'hypericine photosensibilisent avec un bon rendement la formation d'oxygene singulet. L'irradiation d'une solution aeree d'hypericine, conduit aussi a la formation du radical anion superoxyde a partir de la reduction de l'oxygene par une semiquinone. Cette formation sensibilisee a ete demontree a l'aide de la reduction du cytochrome c. Les complexes metalliques de l'hypericine peuvent etre utilises comme agents phototherapeutiques
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Negrich, René Catherine. "Philosophy of art forgeries: the aesthetic difference between originals and copies." Thesis, 2011. http://hdl.handle.net/1828/3777.
Full textAbstract:
This thesis consists of three chapters and deals with the aesthetic status of forgeries regarding works of literature, the visual arts, and musical works. The first chapter deals with the definition of forgery and I explain the difference between forgeries and mere fakes. I also give examples of famous art forgeries. In the second chapter I explain the leading arguments regarding the aesthetic status of forgeries. These arguments come from Nelson Goodman, Alfred Lessing, Mark Sagoff, Denis Dutton, John Hoaglund, Tomas Kulka, Kendall Walton, and Sherri Irvin. In the final chapter I give my own view and explain what exactly is aesthetically wrong with forgeries. My main issue with forgeries deals with deception and with what this deception entails.Graduate
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Grgeta, Edi. "Copies and originals in a horizontally and vertically differentiated market with habit and quality differences /." 2005. http://www.gbv.de/dms/zbw/547155735.pdf.
Full text
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Nixon, Richard L. "Origins, distribution, and ecological significance of marine microbial copper ligands." Thesis, 2020. http://hdl.handle.net/1828/12085.
Full textAbstract:
Copper (Cu) is required by marine microbes for essential biological processes, including photosynthesis and nitrogen fixation, but can be toxic above a certain threshold. Copper bioavailability in seawater is regulated by complexation with dissolved organic ligands of unknown source and structure. Culturing experiments have demonstrated the production of high-affinity Cu-binding ligands by marine algae in response to metal stress or limitation, suggesting they function either as metal ‘sponges’ to reduce copper toxicity or ‘carriers’ that promote uptake. The goal of my thesis research was to develop methods for the recovery and characterization of Cu ligands from seawater that could then be applied to natural samples to investigate sources and structures of recovered ligands. Using natural seawater spiked with model Cu ligands, I developed an immobilized Cu(II)-ion affinity chromatography (Cu(II)-IMAC) protocol which was shown to be effective in quantifying an operationally defined subset of natural Cu ligands. I then applied Cu(II)-IMAC to seawater collected along transects in the Canadian Arctic and NE Pacific Ocean to assess the abundance of this ligand pool across a diverse set of samples. Ligand distribution profiles and their covariance with other components of seawater (e.g. chlorophyll) were consistent with in situ biological production of some Cu-binding ligands. Model ligands spiked into seawater and recovered by Cu(II)-IMAC were also used to develop protocols for structural characterization of Cu ligands by solid-phase extraction (SPE) and tandem mass spectrometry (MS/MS). This research provides new tools for the isolation and characterization of copper ligands in natural samples, and new insights into the biogeochemical cycling and ecological significance of Cu in the ocean.Graduate
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LIN, YU-WEI, and 林裕偉. "A Study On The Relationships Among Original Family Parenting Styles, Regulatory Focus Theory And Marital Conflict Coping Strategies." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/aws4gb.
Full textAbstract:
碩士大葉大學
觀光餐旅碩士在職學位學程
107
When the long-term marriages end in divorce, we could know that it’s hard to maintain a happy marriage. In Asia, family of origin “intervention” is everywhere. All the factors from original family make adjustments in a marriage relationship. People in Marrige need to use great effort to accommodate each other. When they grew up in different families, they would have different childhood experiences, characteristics. Not to mention the coping strategies of conflicts. Therefore, the parenting style of original family play a considerable role in the marriage. The purpose of this research was to examine the relationships of original parenting styles, regulatory focus theory and marital conflict coping strategies. A total of 317 questionnaires were received out of 330 (recovery rate was 96%), including 25 invalid questionnaires. In sum, there were 292 valid questionnaires. Data were analyzed through reliability analysis, descriptive statistics and chi-square test. Researchs have showed that parenting style has a significant influence on regulatory focus theory and marital conflict coping strategies. Therefore, this study used regulatory focus as mediation variable to explore how parenting style influences marital conflict strategies. These results showed that original family style will affect regulatory foucus (in which “authoritarian” is asscociated with “prevention” and “authoritative” is asscociated with “promotion”). Furthermore, promotion focused people tend to adopt positive marital conflict coping strategies; howerver, prevention foucused people tend to adopt negative ones. And we also found people grew up in permmissive or authoritarian parenting style who tend to adopt negative marital conflict coping strategies; people grow up in authoritative parenting style who tend to adopt positive strategies if face marital conflict.
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de, Saint-Exupéry Gilles. "Le document technologique original dans le droit de la preuve au Québec." Thèse, 2012. http://hdl.handle.net/1866/9043.
Full textAbstract:
L’adoption de la Loi concernant le cadre juridique des technologies de l’information en 2001 a permis de mettre en place un cadre juridique favorisant l’intégration des technologies de l’information dans le droit. Plus particulièrement en droit de la preuve, cela a conféré au document technologique la qualité d’élément de preuve. Dans ce contexte il a été nécessaire d’adapter certains articles du Code civil du Québec et du même fait certaines règles dont la règle de la meilleure preuve, telle que prévue à l’article 2860 C.c.Q.. Cette règle s’appuyait jusqu’à présent sur la notion d’original, notion propre au support papier dont il a fallu trouver un équivalent pour le document technologique. C’est ce qu’a fait la Loi en prévoyant à son article 12 les caractéristiques de l’original technologique.
Nous nous penchons sur cette notion en regardant quelles sont ses origines et ses justifications, puis nous avons analysé l’article 12 de la Loi qui traite de l’original sous forme technologique. Enfin nous nous sommes interrogé sur la place des reproductions dans le contexte technologique et nous avons vu que celles-ci ont pris de plus en plus d’importance à côté du document original, au fur et à mesure du perfectionnement des moyens de reproduction.The adoption, in 2001, of the Act to Establish a Legal Framework for Information Technology (the Act) allowed the establishment of a legal framework facilitating the integration of Information Technology in law. More specifically in law of evidence, this allowed for the recognition of the technology-based document as evidence. In this context, it was necessary to adapt certain sections of the Civil Code of Québec and, thus, certain rules, among which the best evidence rule, set forth in Section 2860 C.C.Q. Until the Act, this rule relied on the original, a concept specific to the paper medium; consequently, it became necessary to find an equivalent for the technology-based document. This was done by Section 12 of the Act, which sets out the technology-based original’s characteristics. We will look into this concept’s origins and rationale, before analysing Section 12 of the Act, which addresses the original in a technological form. We will then examine the reproductions’ place in the technological context, and ascertain their growing importance beside that of the original document’s, as the means of reproduction continuoulsy improved.
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HUI-CHEN, HSU, and 許惠貞. "Marital Conflict Coping Strategies,The Coparenting in Family of Origin and Mothers'Coparenting." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/56124921334017182844.
Full textAbstract:
碩士輔仁大學
兒童與家庭學系碩士班
95
Abstracts Marital Conflict Coping Strategies, Coparenting in Family of Origin and Mothers’ Coparenting The purposes of this study are to investigate current situation of and the relationships among marital conflict coping strategies, coparenting in family of origin and mothers’ coparenting. The research subjects are 302 non-divorced mothers of children in grades 5 to 6 who live in Taipei County, and whose biological parents were alive when they were in grades 5 to 6. There are several findings in the present study. First of all, mothers perceive relative positive spousal coparenting of “cooperative support” and “relationship improvement”. Secondly, coping strategies of “positive response” and “looking for supports” are significantly related to mothers’ coparenting of “cooperative support” and “relationship improvement”. And coping strategies of “argument”, “introspective self-blame”, “self-interest” and “avoidance” are positively related to mothers’ coparenting of “criticizing resistance”. Thirdly, concerning the relationship of coparenting in family of origin and mothers’ coparenting, significant positive correlations have been shown between coparenting in family of origin of “supportive cooperation” of and mothers’ coparenting of “criticizing resistance”, “cooperative support”, and “relationship improvement” of. However, mothers agree that coparenting in family of origin of “criticizing resistance” shows no significant correlations with mothers’ coparenting of “criticizing resistance”, “cooperative support”, and “relationship improvement”. Finally, the mothers who adopt the “positive response” and “argument” in their marital conflict coping strategies show significant effects on their coparenting of “criticizing resistance”, “cooperative support”, and “relationship improvement”. Key words: marital conflict coping strategies, coparenting in family of origin, coparenting
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Schiller, Jeffrey Christopher. "Structural geology, metamorphism and origin of the Kanmantoo Copper deposit, South Australia." Thesis, 2000. http://hdl.handle.net/2440/19902.
Full textAbstract:
Appendices 5 and 6 are made available in CD-ROM format (See 04SuppMaterial).Includes copies of articles co-authored by the author during the preparation of this thesis as appendix 7.
14 maps (some folded, some col.); inserted in back pocket.
Includes bibliographical references (leaves 242-264).
System requirements for accompanying CD-ROM: Macintosh of IBM compatible computer. Other requirements: Adobe Acrobat Reader.
[15], 264 leaves : ill. (some col.), maps ; 30 cm. + 1 computer optical disk (4 3/4 in.)
On the basis of the present study it is concluded that there is no firm evidence that the bulk of the mineralisation is pre-metamorphic, although the possibility has not been excluded.
Thesis (Ph.D.) -- University of Adelaide, Dept. of Geology and Geophysics, 2001
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Chandra, Manabendra. "Probing The Origin Of Second Harmonic Generation From Copper Nanoparticles In Solution By Hyper-Rayleigh Scattering." Thesis, 2008. http://hdl.handle.net/2005/814.
Full textAbstract:
In recent years, coinage metal nanoparticles have emerged as materials with largest quadratic optical nonlinearity. Their first hyperpolarizabilities (β) are very high (105-106 x 10-30 esu) but such large values were quite unexpected because of their apparently centrosymmetric bulk structure. Only a small second harmonic generation (SHG) from coinage metal nanoparticles is expected through higher order multipolar (e.g., quadrupolar) polarization mechanisms.
Various possible reasons have been attributed to the observation of large β values in coinage metal nanoparticles. They are: 1) Particles may not be overall centrosymmetric (as appears from the TEM pictures) which, in turn, can make SHG electric dipole allowed, 2) Several polarization mechanisms (dipolar, quadrupolar, retardation, etc.) may be operating simultaneously to render SHG very efficient, 3) SHG can be resonance enhanced if the incident or SH photons fall within the surface plasmon resonance (SPR) absorption bands or higher energy interband transitions in the metal particles, and 4) Surface capping agents used for stabilization of the nanoparticles in solution alter the SH response. It is, therefore, important to experimentally find out which of the above mentioned possibilities are dominant and under what conditions we can identify the contribution of various mechanisms to the overall SHG response of the coinage metal nanoparticles. In this thesis work, the origin of SHG from copper (one of the coinage metals) nanoparticles has been investigated using hyper-Rayleigh scattering (HRS).
In chapter 1, an introduction to metal nanoparticles and their optical properties have been presented. A general introduction to second order nonlinear optics and various methods for the determination of first hyperpolarizability are provided. A literature survey on the second order NLO properties of metal nanoparticles is also done. At the end of the chapter, the motivation of the work done is outlined.
In chapter 2, the experimental set-ups for unpolarized and polarization resolved hyper-Rayleigh scattering (HRS) measurements at different wavelengths are described. Generation of IR wavelength of 1543 and 1907 nm using stimulated Raman scattering in gases have been presented in this chapter.
In chapter 3, synthesis and characterization of copper nanoparticles are described. Four different size copper nanoparticles (5, 9, 25, and 55 nm) were prepared by laser ablation. Size dependencies of first hyperpolarizability were investigated at different wavelengths and it was found that β increases with increasing size of the particle and that the SHG originates mainly from the surface of the particle. Dispersion in first hyperpolarizabilities of the copper nanoparticles has also been investigated and we find that at incident and SH wavelengths far from the SPR absorption band, the hyperpolarizability is large compared to molecular hyperpolarizabilities.
In chapter 4, the results of polarization resolved HRS measurements on copper nanoparticles of five different sizes at four different wavelengths (738, 1064, 1543 and 1907 nm) are reported. Polarization analyses show that at small particle size to wavelength (d/λ) ratio the dipolar contribution to SHG is dominant whereas the quadrupolar and retardation effects become important at larger d/λ values. The “small particle limit” in the SHG from coinage metal nanoparticles has been assessed based on our results on copper and others’ results on silver and gold nanoparticles. In chapter 5, the effect of surface capping on the first hyperpolarizability of copper nanoparticles is investigated. Polyvinyl pyrrolidone (PVP) has been used as a capping agent. The results obtained for bare and capped copper nanoparticles show that capping enhances the hyperpolarizability by a factor of 2. In the last chapter 6, general conclusions drawn on SHG from coinage metal nanoparticles based on this work are presented along with future perspectives.
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Schiller, Jeffrey Christopher. "Structural geology, metamorphism and origin of the Kanmantoo Copper deposit, South Australia / by Jeffrey Christopher Schiller." 2000. http://hdl.handle.net/2440/19902.
Full textAbstract:
Appendices 5 and 6 are made available in CD-ROM format.Includes copies of articles co-authored by the author during the preparation of this thesis as appendix 7.
14 maps (some folded, some col.); inserted in back pocket.
Includes bibliographical references (leaves 242-264).
System requirements for accompanying CD-ROM: Macintosh of IBM compatible computer. Other requirements: Adobe Acrobat Reader.
[15], 264 leaves : ill. (some col.), maps ; 30 cm. + 1 computer optical disk (4 3/4 in.)
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
On the basis of the present study it is concluded that there is no firm evidence that the bulk of the mineralisation is pre-metamorphic, although the possibility has not been excluded.
Thesis (Ph.D.)--Adelaide University, Dept. of Geology and Geophysics, 2001
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Hafer, M. R. "Origin and controls of deposition of the Wheal Hughes and Poona copper deposits, Moonta, South Australia." Thesis, 1991. http://hdl.handle.net/2440/86976.
Full textAbstract:
This item is only available electronically.The Wheal Hughes and Poona mines are situated within the Moonta-Wallaroo copper district on the NW region of Yorke Peninsula approximately 150 km NW of Adelaide, S.A. Copper mineralisation is hosted by the Moonta Porphyry, a rhyolite/rhyodacite feldspar porphyry of Early Proterozoic age. The Wheal Hughes and Poona lodes are structurally controlled tabular, en echelon and sheeted fissure veins, which strike 040-050 and have a 45deg to 60deg westerly dip. Two distinct groups of mineralisation are found to occur at Wheal Hughes: (1) the NE Leighton's lode which closely resembles Poona and is typical of Moonta lodes, and (2) the SW Wheal Hughes lode which is unique to the region, in consisting of a series of parallel veins in close proximity and having extensive wall rock alteration. Mineralisation consists predominantly of chalcopyrite and pyrite with minor components of magnetite, hematite, bornite, marcasite, carrollite, molybdenite and gold. A generic model for the mineralisation at Wheal Hughes and Poona is proposed from fluid inclusion studies and petrographic studies, and sulphur isotope, chlorite and sericite analyses together with thermodynamic modelling. Magmatic hydrothermal fluids enriched in metals migrated towards the surface via fractures, which were possibly formed from the emplacement and subsequent cooling of underlying Proterozoic granites. These fractures provided pathways for the migration of hydrothermal fluids as well as sites for the deposition of the ore bodies. Metal deposition occurred as a consequence of a two step boiling process during fluid ascent along fracture conduits, which involved the separation of gases (+ steam) from the liquid phase. Condensation and oxidation of the gas phase produced acid waters that triggered argillic alteration of the country rocks. Two possible heat mechanisms generated the hydrothermal system in the Moonta district; the disruption of the geothermal gradient by the intrusion of an igneous body at depth or a dilatancy/fluid diffusion process. In either case, the heat source generated a hydrothermal system which focussed mineralising fluids into dilatant fractures, effectively localising the mineralisation.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 1991