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Université de Neuchâtel

Nouveaux matériaux mésomorphes du ferrocène peralkylé

Severac, Marjorie ; Deschenaux, Robert (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1747.

Ferrocene has been widely used as an electron-donor species in redox-active system (fast and reversible one electron transfer process). Incorporation of ferrocene into mesomorphic macromolecules leads to materials which display interesting redox properties for the development of supramolecular switches. In the first part of our thesis, we synthesized main-chain liquid-crystalline polysiloxanes...

Université de Neuchâtel

Métalloenzymes artificielles pour l’hydrogénation énantiosélective basées sur la technologie biotine-avidine

Collot, Jérôme ; Ward, Thomas (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1753.

Dans le domaine de la catalyse énantiosélective, la seconde sphère de coordination (solvant, contre-ions, etc…) influence fortement les propriétés du catalyseur. En exploitant les faibles intéractions qui régissent la seconde sphère de coordination, nous avons incorporé un catalyseur précurseur achiral dans une protéine, offrant ainsi un environnement chiral bien défini autour du...

Université de Neuchâtel

Advances in biological tracer techniques for hydrology and hydrogeology using bacteriophages : Optimization of the methods and investigation of the behavior of bacterial viruses in surface waters and in porous and fractured aquifers = Utilisation de bactériophages comme traceurs en hydrologie et en hydrogéologie

Rossi, Pierre ; Aragno, Michel (Dir.) ; Muller, Imre (Codir.)

Thèse de doctorat : Université de Neuchâtel : 1994 ; 1570.

This work was undertaken in the Laboratoire de Microbiologie of the University of Neuchâtel, in close collaboration with the Center of Hydrogeology (CHYN). This multi-disciplinary research project was instigated because of the growing need both for environmentally harmless hydrogeological investigation tools, and for new tracers that can be used in multitracing experiments. This work treats of...

Université de Neuchâtel

A physiological and molecular approach to study organic acid exudation and development of cluster roots in Lupinus albus L

Langlade, Nicolas Bernard ; Martinoia, E (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2002 ; 1614.

Cluster roots (or proteoid roots) are bottlebrush-like structures, developed by hundreds of plant species (mainly of Proteaceae family, but also the legume Lupinus albus L.) induced by nutrient stresses, especially P. These structures are characterized by a strong capacity to exude citrate (up to 7 µmol .h-1 .g-1) and malate in the rhizosphere and thus to increase the availability of P, Fe and...

Université de Neuchâtel

Influence d'une augmentation en pCO2 atmosphérique sur les communautés bactériennes associées à Molinia coerulea

Hamelin, Jérôme ; Aragno, Michel (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2003 ; 1740.

The thesis deals with the influence of the rising of the atmospheric carbon dioxide content observed on earth since one century. We postulated that the global changes would first alter the soil organisms located near the roots because of a modification of the quantity and quality of root exudates with an elevation of CO2 content. We focused on the microbial communities living near the roots of...

Université de Lausanne

Development of a 3D very high-resolution seismic reflection system for lacustrine settings - a case study over a thrust fault zone in Lake Geneva

Scheidhauer, Maren ; Marillier, François (Dir.)

Thèse de doctorat : Université de Lausanne : 2003.

An efficient high-resolution three-dimensional (3-D) seismic reflection system for small-scale targets in lacustrine settings was developed. In Lake Geneva, near the city of Lausanne, Switzerland, past high-resolution two-dimensional (2-D) investigations revealed a complex fault zone (the Paudèze thrust zone), which was subsequently chosen for testing our system. Observed structures include a...

Université de Neuchâtel

Les ministères dans les épîtres pastorales : 1 Timothée, 2 Timothée, Tite

Cochand, Nicolas ; Keastli, Jean-Daniel (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2002 ; 1623.

Par épîtres pastorales, on désigne trois lettres du Nouveau Testament, 1 Timothée, 2 Timothée et Tite. La thèse analyse ces documents sous l'angle de la problématique des ministères, c'est-à-dire de la manière dont les textes répartissent, légitiment ou critiquent les charges et les fonctions au sein de la communauté ecclésiale. Les Pastorales sont le reflet d'un conflit...

Université de Lausanne

La contraception d'urgence chez les adolescents en Suisse: une étude sur la sexualité des 16-20 ans

Ottesen, Sandrine ; Michaud, Pierre-André (Dir.)

Thèse de doctorat : Université de Lausanne : 2002.

Purpose: To describe and analyze emergency contraception (EC) awareness and use among sexually active Swiss teenagers. Methods: Anonymous computerized questionnaires were distributed to a national representative sample of 4283 in-school adolescents (aged 16 to 20 years) in high schools and professional centers. Young people who were sexually active (51.5% of the sample: 1058 girls and 1073 boys)...