Refine my results

Language

Bibliothèque cantonale jurassienne

Neogene/Quaternary mammalian migrations in eastern Mediterranean

Koufos, George D.

In: Belgian journal of zoology : BJZ, 2005, vol. 135, no. 2, p. 181

Bibliothèque cantonale jurassienne

Results of the CERPOLEX/mammuthus expeditions on the Taimyr peninsula, Arctic Siberia, Russian Federation

Mol, Dick

In: Quaternary science reviews : the international multidisciplinary research and review journal, 2006, vol. 142-143, p. 186

Université de Fribourg

Geographical parthenogenesis, genome size variation and pollen production in the arctic-alpine species Hieracium alpinum

Mráz, Patrik ; Chrtek, Jindřich ; Šingliarová, Barbora

In: Botanica Helvetica, 2009, vol. 119, no. 1, p. 41-51

Hieracium alpinum L. (Asteraceae) is an arctic-alpine species distributed throughout Europe with both diploid and triploid cytotypes. We determined the ploidy levels of plants from 23 populations from Austria, Bosnia and Herzegovina, Finland, Italy, Norway, Romania, Slovakia, Switzerland and Ukraine. Data showed a non- overlapping pattern of cytotype distribution: sexually reproducing diploids...

Université de Fribourg

Density ripples in expanding low-dimensional gases as a probe of correlations

Imambekov, A. ; Mazets, I. E. ; Petrov, D. S. ; Gritsev, Vladimir ; Manz, S. ; Hofferberth, S. ; Schumm, T. ; Demler, Eugene ; Schmiedmayer, J.

In: Physical Review A, 2009, vol. 80, p. 033604

We investigate theoretically the evolution of the two-point density correlation function of a low-dimensional ultracold Bose gas after release from a tight transverse confinement. In the course of expansion thermal and quantum fluctuations present in the trapped systems transform into density fluctuations. For the case of free ballistic expansion relevant to current experiments, we present simple...

Université de Fribourg

Mouse model of type II Bartter's syndrome. II. Altered expression of renal sodium- and water-transporting proteins

Wagner, Carsten A. ; Loffing-Cueni, Dominique ; Yan, Qingshang ; Schulz, Nicole ; Fakitsas, Panagiotis ; Carrel, Monique ; Wang, Tong ; Verrey, François ; Geibel, John P. ; Giebisch, Gerhard ; Hebert, Steven C. ; Loffing, Johannes

In: American Journal of Physiology: Renal Physiology, 2008, vol. 294, no. 6, p. F1373-F1380

ROMK-deficient (Romk–/–) mice exhibit polyuria, natriuresis, and kaliuresis similar to individuals with type II Bartter's form of hyperprostaglandin E syndrome (HPS; antenatal Bartter's syndrome). In the present study, we utilized both metabolic and clearance studies to define the contributions of specific distal nephron segments to the renal salt wasting in these mice. The...

Université de Fribourg

Benzothiadiazole affects the leaf proteome in arctic bramble (Rubus arcticus)

Hukkanen, Anne ; Kokko, Harri ; Buchala, Antony ; Häyrinen, Jukka ; Kärenlampi, Sirpa

In: Molecular Plant Pathology, 2008, vol. 9, no. 6, p. 799 - 808

Benzothiadiazole (BTH) induces resistance to the downy mildew pathogen, Peronospora sparsa, in arctic bramble, but the basis for the BTH-induced resistance is unknown. Arctic bramble cv. Mespi was treated with BTH to study the changes in leaf proteome and to identify proteins with a putative role in disease resistance. First, BTH induced strong expression of one PR-1 protein isoform, which was...

Université de Fribourg

Role of accumbens BDNF and TrkB in cocaine-induced psychomotor sensitization, conditioned-place preference, and reinstatement in rats

Bahi, Amine ; Boyer, Frederic ; Vijay, Chandrasekar ; Dreyer, Jean-Luc

In: Psychopharmacology, 2008, vol. 199, no. 2, p. 169-182

Background Brain-derived neurotrophic factor (BDNF) is involved in the survival and function of midbrain DA neurons. BDNF action is mediated by the TrkB receptor–tyrosine kinase, and both BDNF and TrkB transcripts are widely expressed in the rat mesolimbic pathway, including the nucleus accumbens (NAc) and the ventral tegmentum area (VTA). Objective BDNF was previously shown to be involved in...

Université de Fribourg

Non-canonical eukaryotic glutaminyl- and glutamyl-tRNA synthetases form mitochondrial aminoacyl-tRNA in Trypanosoma brucei

Rinehart, Jesse ; Horn, Elke K. ; Wei, David ; Söll, Dieter ; Schneider, André

In: Journal of Biological Chemistry, 2004, vol. 279, p. 1161-1166

Glutaminyl-tRNA synthetase is thought to be absent from organelles. Instead, Gln-tRNA is formed via the transamidation pathway, the other route to this essential compound in protein biosynthesis. However, it was previously shown that glutaminyl-tRNA synthetase activity is present in Leishmania mitochondria. This work identifies genes encoding glutaminyl- and glutamyl-tRNA synthetase in the...