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Université de Neuchâtel

Contributions d'entretien et maximes de procédure

Bohnet, François

In:, 2014, no. Eté, p. 1-2

Université de Neuchâtel

Distribution of Endosymbiotic Reproductive Manipulators Reflects Invasion Process and Not Reproductive System Polymorphism in the Little Fire Ant Wasmannia auropunctata

Rey, Olivier ; Estoup, Arnaud ; Facon, Benoit ; Loiseau, Anne ; Aebi, Alexandre ; Duron, Olivier ; Vavre, Fabrice ; Foucaud, Julien

In: Plos One, 2013/8/3/e58467/1-11

Endosymbiotic reproductive manipulators may have drastic effects on the ecological and evolutionary dynamics of their hosts. The prevalence of these endosymbionts reflects both their ability to manipulate their hosts and the history of the host populations. The little fire ant Wasmannia auropunctata displays a polymorphism in both its reproductive system (sexual versus clonal populations)...

Université de Neuchâtel

Ecological genetics of invasive alien species

Lawson Handley, L.-J ; Estoup, A. ; Evans, D. M ; Thomas, C. E ; Lombaert, E ; Facon, B ; Aebi, A ; Roy, H. E

In: BioControl, 2011, vol. 56, no. 4, p. 409-428

There is growing realisation that integrating genetics and ecology is critical in the context of biological invasions, since the two are explicitly linked. So far, the focus of ecological genetics of invasive alien species (IAS) has been on determining the sources and routes of invasions, and the genetic make-up of founding populations, which is critical for defining and testing ecological and...

Université de Neuchâtel

Comparative analysis of ammonia monooxygenase (amoA) genes in the water column and sediment–water interface of two lakes and the Baltic Sea

Ok-Sun, Kim ; Junier, Pilar ; Imhoff, Johannes F ; Witzel, Karl-Paul

In: FEMS Microbiology Ecology, 2008, vol. 66, no. 2, p. 367–378

The functional gene amoA was used to compare the diversity of ammonia-oxidizing bacteria (AOB) in the water column and sediment–water interface of the two freshwater lakes Plußsee and Schöhsee and the Baltic Sea. Nested amplifications were used to increase the sensitivity of amoA detection, and to amplify a 789-bp fragment from which clone libraries were prepared. The larger...

Université de Neuchâtel

Microfabricated alkali vapor cell with anti-relaxation wall coating

Straessle, Rahel ; Pellaton, Matthieu ; Affolderbach, Christoph ; Pétremand, Yves ; Briand, Danick ; Mileti, Gaetano ; de Rooij, Nicolas F

In: Applied Physics Letters, 2014/105/4/043502/1-4

We present a microfabricated alkali vapor cell equipped with an anti-relaxation wall coating. The anti-relaxation coating used is octadecyltrichlorosilane and the cell was sealed by thin-film indium-bonding at a low temperature of 140 °C. The cell body is made of silicon and Pyrex and features a double-chamber design. Depolarizing properties due to liquid Rb droplets are avoided by confining the...

Université de Neuchâtel

The Microloop-Gap Resonator: A Novel Miniaturized Microwave Cavity for Double-Resonance Rubidium Atomic Clocks

Violetti, Maddalena ; Pellaton, Matthieu ; Affolderbach, Christoph ; Merli, Francesco ; Zürcher, Jean-François ; Mileti, Gaetano ; Skrivervik, Anja K

In: IEEE Sensors Journal, 2014, vol. 14, no. 9, p. 3193-3200

Nowadays mobile and battery-powered applications push the need for radically miniaturized and low-power frequency standards that surpass the stability achievable with quartz oscillators. For the miniaturization of double-resonance rubidium (87Rb) atomic clocks, the size reduction of the microwave cavity or resonator (MWR) to well below the wavelength of the atomic transition (6.835 GHz...

Public access from Dec 1, 2014
Université de Neuchâtel

Ultra-stable microwave generation with a diode-pumped solid-state laser in the 1.5-µm range

Dolgovskiy, Vladimir ; Schilt, Stéphane ; Bucalovic, Nikola ; Di Domenico, Gianni ; Grop, Serge ; Dubois, Benoît ; Giordano, Vincent ; Südmeyer, Thomas

In: Applied Physics B : Lasers and optics, 2014, vol. 116, no. 3, p. 593-601

We demonstrate the first ultra-stable microwave generation based on a 1.5-µm diode-pumped solid-state laser (DPSSL) frequency comb. Our system relies on optical-to-microwave frequency division from a planar-waveguide external cavity laser referenced to an ultra-stable Fabry–Perot cavity. The evaluation of the microwave signal at ~10 GHz uses the transportable ultra-low-instability signal...

Université de Neuchâtel

The genome of the Gram-positive metal- and sulfate-reducing bacterium Desulfotomaculum reducens strain MI-1

Junier, Pilar ; Junier, Thomas ; Podell, Sheila ; Sims, David R ; Detter, John C ; Lykidis, Athanasios ; Han, Cliff S ; Wigginton, Nicholas S ; Gaasterland, Terry ; Bernier-Latmani, Rizlan

In: Environmental Microbiology, 2010, vol. 12, no. 10, p. 2738–2754

Spore-forming, Gram-positive sulfate-reducing bacteria (SRB) represent a group of SRB that dominates the deep subsurface as well as niches in which resistance to oxygen and dessication is an advantage. Desulfotomaculum reducens; strain MI-1 is one of the few cultured representatives of that group with a complete genome sequence available. The metabolic versatility of this organism is...