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Université de Fribourg

Revealing the pseudogap in ${\mathrm{Sr}}_{3}{({\mathrm{Ru}}_{0.985}{\mathrm{Fe}}_{0.015})}_{2}{\mathrm{O}}_{7}$ by optical spectroscopy

Ban, W. J. ; Xu, Bing ; Li, W. H. ; Wang, Y. ; Ge, J. J. ; Li, P. G. ; Yang, R. ; Dai, Y. M. ; Mao, Z. Q. ; Xiao, H.

In: Physical Review B, 2018, vol. 98, no. 20, p. 205111

We report resistivity, magnetization, and optical spectroscopy study on single-crystal sample of Sr3(Ru0.985Fe0.015 )2O7. An upturn is observed in resistivity at about 30 K. Below 30 K, the dip in resistivity R(ω), the suppression in scattering rate 1/τ (ω), the peaklike feature in optical conductivity σ1(ω), and the remainder of spectral weight all suggest the formation of a pseudogap....

Université de Fribourg

Characterization of the global network of optical magnetometers to search for exotic physics (GNOME)

Afach, S. ; Budker, D. ; Camp, G. De ; Dumont, V. ; Grujić, Zoran Dragan ; Guo, H. ; Jackson Kimball, D. F. ; Kornack, T. W. ; Lebedev, Victor ; Li, W. ; Masia-Roig, H. ; Nix, S. ; Padniuk, M. ; Palm, C. A. ; Pankow, C. ; Penaflor, A. ; Peng, X. ; Pustelny, Simon ; Scholtes, Theo ; Smiga, J. A. ; Stalnaker, J. E. ; Weis, Antoine ; Wickenbrock, A. ; Wurm, D.

In: Physics of the Dark Universe, 2018, vol. 22, p. 162–180

The Global Network of Optical Magnetometers to search for Exotic physics (GNOME) is a network of geographically separated, time-synchronized, optically pumped atomic magnetometers that is being used to search for correlated transient signals heralding exotic physics. The GNOME is sensitive to nuclear- and electron-spin couplings to exotic fields from astrophysical sources such as compact...

Université de Fribourg

Tunable 2D binary colloidal alloys for soft nanotemplating

Fernández-Rodríguez, Miguel Ángel ; Elnathan, Roey ; Ditcovski, Ran ; Grillo, Fabio ; Conley, Gaurasundar Marc ; Timpu, Flavia ; Rauh, Astrid ; Geisel, Karen ; Ellenbogen, Tal ; Grange, Rachel ; Scheffold, Frank ; Karg, Matthias ; Richtering, Walter ; Voelcker, Nicolas H. ; Isa, Lucio

In: Nanoscale, 2018, vol. 10, no. 47, p. 22189–22195

The realization of non-close-packed nanoscale patterns with multiple feature sizes and length scales via colloidal self-assembly is a highly challenging task. We demonstrate here the creation of a variety of tunable particle arrays by harnessing the sequential self-assembly and deposition of two differently sized microgel particles at the fluid–fluid interface. The two-step process is...

Université de Fribourg

Rapid multiplex polymerase chain reaction for detection of mcr-1 to mcr-5 genes

Lescata, Mathilde ; Poirel, Laurent ; Nordmann, Patrice

In: Diagnostic Microbiology and Infectious Disease, 2018, vol. 92, no. 4, p. 267–269

A rapid (total time <2 h) and reliable multiplex polymerase chain reaction for screening of mcr-1 to mcr-5 genes conferring resistance to colistin has been developed. This technique has been tested on a collection of isolates previously identified as bearing mcr-1, mcr-2, and mcr-like genes and had a sensitivity and a specificity of 100%. Using this method, we were also able to identify a...

Université de Fribourg

Performances of the rapid polymyxin Acinetobacter and Pseudomonas tests for colistin susceptibility testing

Lescat, Mathilde ; Poirel, Laurent ; Jayol, Aurélie ; Nordmann, Patrice

In: Microbial Drug Resistance, 2018, p. -

Owing to the emergence of colistin resistance in nonfermenting Gram negative bacteria, reliable and rapid techniques for testing colistin susceptibility are needed. We evaluated the performances of the Rapid Polymyxin Acinetobacter and Pseudomonas tests using a collection of Acinetobacter baumannii and Pseudomonas aeruginosa clinical isolates.Methods: Colistin susceptibility of A. baumannii...

Université de Fribourg

Expression pattern of delta-like 1 homolog in developing sympathetic neurons and chromaffin cells

El Faitwri, Tehani ; Huber, Katrin

In: Gene Expression Patterns, 2018, vol. 30, p. 49–54

Delta-like 1 homolog (DLK1) is a member of the epidermal growth factor (EGF)-like family and an atypical notch ligand that is widely expressed during early mammalian development with putative functions in the regulation of cell differentiation and proliferation. During later stages of development, DLK1 is downregulated and becomes increasingly restricted to specific cell types, including...

Université de Fribourg

Downslope-shifting pockmarks: interplay between hydrocarbon leakage, sedimentations, currents and slope’s topography

Ho, Sutieng ; Imbert, Patrice ; Hovland, Martin ; Wetzel, Andreas ; Blouet, Jean-Philippe ; Carruthers, Daniel

In: International Journal of Earth Sciences, 2018, vol. 107, no. 8, p. 2907–2929

Pockmarks in Pliocene-Quaternary continental slope deposits offshore Angola show features related to: (1) fluid leakage craters that formed repeatedly, (2) authigenic methane-derived carbonates that indicate the (former) presence of hydrocarbons and (3) erosional–depositional structures that are clearly related to current activity. Depending on topography, the pockmarks show differing...

Université de Fribourg

Emotional Inertia and Interpersonal Adaptation in Intimate Relationships

Luginbühl, Tamara ; Schöbi, Dominik (Dir.)

Thèse de doctorat : Université de Fribourg, 2018.

Emotions are not static but fluctuate over time as a function of contextual changes (Kuppens, Allen, & Sheeber, 2010). This temporal feature of emotions is considered in the concept of emotional inertia, which reflects the degree to which emotions are resistant to change over time (Kuppens et al., 2010). Several studies suggest an association between emotional inertia and psychological...

Accès public à partir du 15 janv. 2021
Università della Svizzera italiana

Modelling protein-protein interactions to elucidate molecular mechanisms behind neurodegenerative diseases

Grasso, Gianvito ; Krause, Rolf (Dir.) ; Danani, Andrea (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018INFO017.

The worldwide significant increase in life expectancy has recently drawn the attention of the scientific community to neurodegenerative pathologies of the elderly population. These neurodegenerative disorders arise from the abnormal protein aggregation in the nervous tissue leading to intracellular inclusions or extracellular aggregates in specific brain areas. A feasible strategy to prevent...

Université de Fribourg

The diversity of population responses to environmental change

Colchero, Fernando ; Jones, Owen R. ; Conde, Dalia A. ; Hodgson, David ; Zajitschek, Felix ; Schmidt, Benedikt R. ; Malo, Aurelio F. ; Alberts, Susan C. ; Becker, Peter H. ; Bouwhuis, Sandra ; Bronikowski, Anne M. ; Vleeschouwer, Kristel M. ; Delahay, Richard J. ; Dummermuth, Stefan ; Fernández‐Duque, Eduardo ; Frisenvænge, John ; Hesselsøe, Martin ; Larson, Sam ; Lemaître, Jean‐François ; McDonald, Jennifer ; Miller, David A.W. ; O'Donnell, Colin ; Packer, Craig ; Raboy, Becky E. ; Reading, Chris J. ; Wapstra, Erik ; Weimerskirch, Henri ; While, Geoffrey M. ; Baudisch, Annette ; Flatt, Thomas ; Coulson, Tim ; Gaillard, Jean‐Michel

In: Ecology Letters, 2019, p. -

The current extinction and climate change crises pressure us to predict population dynamics with ever‐greater accuracy. Although predictions rest on the well‐advanced theory of age‐structured populations, two key issues remain poorly explored. Specifically, how the age‐dependency in demographic rates and the year‐to‐year interactions between survival and fecundity affect...