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Université de Fribourg

Efficiency of natural substances to protect Beauveria bassiana conidia from UV radiation

Kaiser, Deborah ; Bacher, Sven ; Mène‐Saffrané, Laurent ; Grabenweger, Giselher

In: Pest Management Science, 2019, vol. 75, no. 2, p. 556–563

Solar radiation is assumed to be a major factor limiting the efficacy of entomopathogenic fungi used as biocontrol agents in open field applications. We evaluated 12 natural UV‐protective co‐formulants for their effect on the survival of UV‐ exposed Beauveria bassiana spores on agar plates, colza leaf discs and in the field.RESULTS: Colony‐forming unit (CFU) counts of unformulated...

Université de Fribourg

A taxonomic reassessment of Piramys auffenbergi, a neglected turtle from the late Miocene of Piram Island, Gujarat, India

Ferreira, Gabriel S. ; Bandyopadhyay, Saswati ; Joyce, Walter G.

In: PeerJ, 2018, vol. 6, p. e5938

Piramys auffenbergi was described as an emydine turtle based on a well-preserved skull retrieved from late Miocene deposits exposed on Piram Island, India. The description and figures provided in the original publication are vague and do not support assignment to Emydinae. This taxon has mostly been ignored by subsequent authors.Material and Methods: We reexamine the holotype specimen,...

Université de Fribourg

Beyond global charge: role of amine bulkiness and protein fingerprint on nanoparticle–cell interaction

Burnand, David ; Milosevic, Ana ; Balog, Sandor ; Spuch-Calvar, Miguel ; Rothen-Rutishauser, Barbara ; Dengjel, Jörn ; Kinnear, Calum ; Moore, Thomas L. ; Petri-Fink, Alke

In: Small, 2018, vol. 14, no. 46, p. 1802088

Amino groups presented on the surface of nanoparticles are well‐known to be a predominant factor in the formation of the protein corona and subsequent cellular uptake. However, the molecular mechanism underpinning this relationship is poorly defined. This study investigates how amine type and density affect the protein corona and cellular association of gold nanoparticles with cells in...

Université de Neuchâtel

Social behaviour, stress and parasites : comparing free-ranging wolves in Yellowstone (USA), Abruzzo (Italy) and Mercantour (France) national parks

Molnar, Barbara ; Betschart, Bruno (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2012.

Occupant autrefois la majeure partie de l’hémisphère nord, les populations de loups (Canis lupus) ont disparu dans une importante partie de leur aire de distribution initiale, consécutivement à la persécution humaine. Suite à la protection de l’espèce, le carnivore a récemment étendu son aire de distribution, par des mouvements de dispersion ou au travers de programmes de...

Université de Fribourg

Packmem: a versatile tool to compute and visualize interfacial packing defects in lipid bilayers

Gautier, Romain ; Bacle, Amélie ; Tiberti, Marion L. ; Fuchs, Patrick F. ; Vanni, Stefano ; Antonny, Bruno

In: Biophysical Journal, 2018, vol. 115, no. 3, p. 436–444

The analysis of the structural organization of lipid bilayers is generally performed across the direction normal to the bilayer/water interface, whereas the surface properties of the bilayer at the interface with water are often neglected. Here, we present PackMem, a bioinformatic tool that performs a topographic analysis of the bilayer surface from various molecular dynamics simulations....

Università della Svizzera italiana

Exposing concurrency failures : a comprehensive survey of the state of the art and a novel approach to reproduce field failures

Bianchi, Francesco Adalberto ; Pezzè, Mauro (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018INFO015.

With the rapid advance of multi-core and distributed architectures, concurrent systems are becoming more and more popular. Concurrent systems are extremely hard to develop and validate, as their overall behavior depends on the non-deterministic interleaving of the execution flows that comprise the system. Wrong and unexpected interleavings may lead to concurrency faults that are extremely...

Université de Fribourg

Impact of physical activity on energy balance, food intake and choice in normal weight and obese children in the setting of acute social stress : a randomized controlled trial

Horsch, Antje ; Wobmann, Marion ; Kriemler, Susi ; Munsch, Simone ; Borloz, Sylvie ; Balz, Alexandra ; Marques-Vidal, Pedro ; Borghini, Ayala ; Puder, Jardena J.

In: BMC Pediatrics, 2015, vol. 15, no. 12, p. 1-10

Background: Psychological stress negatively influences food intake and food choices, thereby contributing to the development of childhood obesity. Physical activity can also moderate eating behavior and influence calorie intake. However, it is unknown if acute physical activity influences food intake and overall energy balance after acute stress exposure in children. We therefore investigated the...

Université de Neuchâtel

Measurement of the linewidth enhancement factor of singlemode room temperature continuous wave quantum cascade lasers

Aellen, Thierry ; Aebi, Philipp (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2008.

L'invention des sources lasers en 1960 a conduit à un bon nombre d'applications qui ont un impact répandu dans tous les aspects de notre votre vie actuelle, citons notamment l'exemple des hôpitaux, de l'industrie ou simplement dans notre lieu de vie. Les derniers développements sont en particulier issus des compacts, très efficace et populaires lasers semiconducteurs qui sont simplement...

Université de Neuchâtel

The unidirectionality of semantic changes in grammaticalization: an experimental approach to the asymmetric priming hypothesis

Hilpert, Martin ; Correia Saavedra, David

In: English Language & Linguistics, 2018, vol. 22, no. 3, p. 357-380

Why is semantic change in grammaticalization typically unidirectional? It is a well-established finding that in grammaticalizing constructions, more concrete meanings tend to evolve into more schematic meanings. Jäger & Rosenbach (2008) appeal to the psychological phenomenon of asymmetric priming in order to explain this tendency. This article aims to evaluate their proposal on the basis of...

Université de Fribourg

Interaction of the hydrogen sulfide system with the oxytocin system in the injured mouse heart

Merz, Tamara ; Lukaschewski, Britta ; Wigger, Daniela ; Rupprecht, Aileen ; Wepler, Martin ; Gröger, Michael ; Hartmann, Clair ; Whiteman, Matthew ; Szabo, Csaba ; Wang, Rui ; Waller, Christiane ; Radermacher, Peter ; McCook, Oscar

In: Intensive Care Medicine Experimental, 2018, vol. 6, no. 1, p. 41

Both the hydrogen sulfide/cystathionine-γ-lyase (H2S/CSE) and oxytocin/oxytocin receptor (OT/OTR) systems have been reported to be cardioprotective. H2S can stimulate OT release, thereby affecting blood volume and pressure regulation. Systemic hyper-inflammation after blunt chest trauma is enhanced in cigarette smoke (CS)-exposed CSE−/− mice compared to wildtype (WT). CS increases...