Affiner les résultats

Type de document

Langue

Université de Fribourg

Adsorption-induced kondo effect in metal-free phthalocyanine on Ag(111)

Granet, J. ; Sicot, M. ; Gerber, I. C. ; Kremer, Geoffroy ; Pierron, T. ; Kierren, B. ; Moreau, L. ; Fagot-Revurat, Y. ; Lamare, S. ; Chérioux, F. ; Malterre, D.

In: The Journal of Physical Chemistry C, 2020, vol. 124, no. 19, p. 10441–10452

We report on the formation of a two-dimensional supramolecular Kondo lattice made of organic molecules comprising only C, N, and H atoms, namely metal-free phthalocyanines 2HPc (C32H18N8), adsorbed on a Ag(111) surface. Low-temperature scanning tunneling microscopy/spectroscopy (LT-STM/STS), ultraviolet photoemission spectroscopy (UPS), and density functional theory (DFT) are used to...

Université de Neuchâtel

The significance of the adversative connectives aber, mais, ma (‘but’) as indicators in young children’s argumentation

Rocci, Andrea ; Greco, Sara ; Schär, Rebecca ; Convertini, Josephine ; Perret-Clermont, Anne-Nelly ; Iannaccone, Antonio

In: Journal of Argumentation in Context, 2020, vol. 69, no. 1, p. 69-94

Adversative connectives have been analyzed as articulating explicit and implicit facets of argumentative moves and have been thus recognized as potential argumentative indicators. Here we examine adversative connectives Ger. aber, Fr. mais, It. ma (‘but’) in young children’s speech in the context of the ArgImp project, a research endeavor seeking to understand in which...

Université de Fribourg

Superconductivity-induced transverse plasma mode and phonon anomaly in the $c$-axis response of the bilayer compound ${\mathrm{RbCa}}_{2}{\mathrm{Fe}}_{4}{\mathrm{As}}_{4}{\mathrm{F}}_{2}$

Xu, Bing ; Munzar, Dominik ; Dubroka, Adam ; Sheveleva, Evgeniia ; Lyzwa, Fryderyk ; Maršík, Premysl ; Wang, C. N. ; Wang, Z. C. ; Cao, G. H. ; Bernhard, Christian

In: Physical Review B, 2020, vol. 101, no. 21, p. 214512

We studied the infrared response of polycrystalline samples of the iron arsenide superconductor (Rb,Cs)Ca2Fe4As4F2 (Rb,Cs-12442), which has a bilayer structure similar to the high-Tc cuprates YBa2Cu3O7 (YBCO) and Bi2Sr2CaCu2O8. The c-axis reflectivity spectra Rc have been derived from the reflectivity spectra of the polycrystalline samples Rpoly and the in-plane spectrum of a corresponding...

Université de Fribourg

Infrared spectroscopy study of the in-plane response of ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{6.6}$ in magnetic fields up to 30 Tesla

Lyzwa, Fryderyk ; Xu, Bing ; Maršík, Premysl ; Sheveleva, Evgeniia ; Crassee, I. ; Orlita, M. ; Bernhard, Christian

In: Physical Review Research, 2020, vol. 2, no. 2, p. 023218

With terahertz and infrared spectroscopy we studied the in-plane response of an underdoped, twinned YBa2Cu3O6.6 single crystal with Tc=58(1)K in high magnetic fields up to B=30 Tesla (T) applied along the c axis. Our goal was to investigate the field-induced suppression of superconductivity and to observe the signatures of the three-dimensional (3D) incommensurate copper charge density wave...

Université de Fribourg

The type I-E CRISPR-Cas system influences the acquisition of bla KPC-IncF plasmid in Klebsiella pneumonia

Zhou, Ying ; Tang, Yu ; Fu, Pan ; Tian, Dongxing ; Yu, Lianhua ; Huang, Yunkun ; Li, Gang ; Li, Meng ; Wang, Yong ; Yang, Zehua ; Xu, Xiaogang ; Yin, Zhe ; Zhou, Dongsheng ; Poirel, Laurent ; Jiang, Xiaofei

In: Emerging Microbes & Infections, 2020, vol. 9, no. 1, p. 1011–1022

Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae (KPC-KP) have disseminated worldwide and emerged as major threats to public health. Of epidemiological significance, the international pandemic of KPC-KP is primarily associated with CG258 isolates and bla KPC-IncF plasmids. CRISPR-Cas system is an adaptive immune system that can hinder gene expansion driven by horizontal gene ...

Université de Fribourg

Does the single-item self-rated health measure the same thing across different wordings? Construct validity study

Cullati, Stéphane ; Bochatay, Naike ; Rossier, Clémentine ; Guessous, Idris ; Burton‑Jeangros, Claudine ; Courvoisier, Delphine S.

In: Quality of Life Research, 2020, p. -

The self-rated health (SRH) item is frequently used in health surveys but variations of its form (wording, response options) may hinder comparisons between versions over time or across surveys. The objectives were to determine (a) whether three SRH forms are equivalent, (b) the form with the best construct validity and (c) the best coding scheme to maximize equivalence across forms.

Université de Fribourg

Study protocol for the ABERRANT study: antibiotic-induced disruption of the maternal and infant microbiome and adverse health outcomes — a prospective cohort study among children born at term

Volery, Maryse ; Scherz, Valentin ; Jakob, William ; Bandeira, Diane ; Deggim-Messmer, Vanessa ; Lauber-Biason, Anna ; Wildhaber, Johannes ; Falquet, Laurent ; Curtis, Nigel ; Zimmermann, Petra

In: BMJ Open, 2020, vol. 10, no. 6, p. e036275

Introduction: There is compositional overlap between the maternal intestinal microbiome, the breast milk microbiome and the infant oral and intestinal microbiome. Antibiotics cause profound changes in the microbiome. However, the effect of intrapartum and early-life antibiotics on the maternal intestinal and breast milk microbiome, and the infant oral and intestinal microbiome, and whether...

Université de Fribourg

Toward specific ways to combine ketamine and psychotherapy in treating depression

Hasler, Gregor

In: CNS Spectrums, 2020, vol. 25, no. 3, p. 445–447

In major depression, remission rate in response to monoaminergic antidepressant is around 50%. The lack of strong synergies between classical antidepressants and psychotherapy may be due to the molecular effects of classical antidepressants. They modulate synapses but they do not substantially influence synaptogenesis. They also increase brain-derived neurotrophic factor (BDNF). However, for...

Université de Fribourg

Increased anxiety after stimulation of the right inferior parietal lobe and the left orbitofrontal cortex

Grieder, Matthias ; Homan, Philipp ; Federspiel, Andrea ; Kiefer, Claus ; Hasler, Gregor

In: Frontiers in Psychiatry, 2020, vol. 11, p. -

Sustained anxiety is a key symptom of anxiety disorders and may be associated with neural activation in the right inferior parietal lobe (rIPL), particularly under unpredictable threat. This finding suggests a moderating role of the rIPL in sustained anxiety, which we tested in the current study. We applied cathodal or sham transcranial direct current stimulation (tDCS) to the rIPL as a...

Université de Fribourg

The role of TNFR2 and DR3 in the in vivo expansion of tregs in T cell depleting transplantation regimens

Rodriguez-Barbosa, Jose-Ignacio ; Schneider, Pascal ; Graca, Luis ; Bühler, Leo ; Perez-Simon, Jose-Antonio ; Rio, Maria-Luisa del

In: International Journal of Molecular Sciences, 2020, vol. 21, no. 9, p. 3347

Regulatory T cells (Tregs) are essential for the maintenance of tolerance to self and non-self through cell-intrinsic and cell-extrinsic mechanisms. Peripheral Tregs survival and clonal expansion largely depend on IL-2 and access to co-stimulatory signals such as CD28. Engagement of tumor necrosis factor receptor (TNFR) superfamily members, in particular TNFR2 and DR3, contribute to promote...