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Université de Fribourg

Spatially distinct pools of TORC1 balance protein homeostasis

Hatakeyama, Riko ; Péli-Gulli, Marie-Pierre ; Hu, Zehan ; Jaquenoud, Malika ; Osuna, Guillermo Miguel Garcia ; Sardu, Alessandro ; Dengjel, Jörn ; Virgilio, Claudio De

In: Molecular Cell, 2019, vol. 73, no. 2, p. 325-338.e8

The eukaryotic TORC1 kinase is a homeostatic controller of growth that integrates nutritional cues and mediates signals primarily from the surface of lysosomes or vacuoles. Amino acids activate TORC1 via the Rag GTPases that combine into structurally conserved multi-protein complexes such as the EGO complex (EGOC) in yeast. Here we show that Ego1, which mediates membrane-anchoring of EGOC via...

Université de Fribourg

Understanding negative biodiversity–ecosystem functioning relationship in semi-natural wildflower strips

Sandau, Nadine ; Naisbit, Russell E. ; Fabian, Yvonne ; Bruggisser, Odile T. ; Kehrli, Patrik ; Aebi, Alexandre ; Rohr, Rudolf P. ; Bersier, Louis-Félix

In: Oecologia, 2019, vol. 189, no. 1, p. 185–197

Studies on biodiversity–ecosystem functioning (BEF) in highly controlled experiments often yield results incompatible with observations from natural systems: experimental results often reveal positive relationships between diversity and productivity, while for natural systems, zero or even negative relationships have been reported. The discrepancy may arise due to a limited or closed local...

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

Bacillus subtilis PTA-271 counteracts Botryosphaeria dieback in grapevine, triggering immune responses and detoxification of fungal phytotoxins

Trotel-Aziz, Patricia ; Abou-Mansour, Eliane ; Courteaux, Barbara ; Rabenoelina, Fanja ; Clément, Christophe ; Fontaine, Florence ; Aziz, Aziz

In: Frontiers in Plant Science, 2019, vol. 10, p. -

Plant pathogens have evolved various strategies to enter hosts and cause diseases. Particularly Neofusicoccum parvum, a member of Botryosphaeria dieback consortium, can secrete the phytotoxins (-)-terremutin and (R)-mellein during grapevine colonization. The contribution of phytotoxins to Botryosphaeria dieback symptoms still remains unknown. Moreover, there are currently no efficient control...

Haute Ecole pédagogique Fribourg

Le testing provincial de l’Ontario vu par les enseignants : opportunité de développement professionnel ou obligation de faire réussir leurs élèves aux tests ?

Yerly, Gonzague

In: Évaluer. Journal international de recherche en éducation et formation, 2018, vol. 4, no. 3, p. 79-103

Au début des années 2000, la province de l’Ontario a instauré un ambitieux système d’évaluation standardisée des acquis des élèves dans le but d’améliorer la performance de son système scolaire. La politique de testing ontarienne se différencie des systèmes classiques d’accountability (dure ou douce). Elle articule reddition de comptes et responsabilisation des acteurs. Au...

Haute Ecole pédagogique Fribourg

Les concepts transversaux en EDD : un outil pour déjouer le normatif des programmes tout en atteignant les objectifs d'apprentissage?

Pellaud, Francine

In: Actes du colloque « Les « éducations à ... », levier(s) de transformation du système éducatif ?, 2015, p. pp. 332-344

Le développement durable (DD) est un projet de société et un choix politique. Il nécessite l’acquisition de connaissances pour comprendre les problématiques complexes et interdisciplinaires auxquelles il fait référence. Mais plus encore, il nous conduit vers des modes de raisonnement et des logiques qui nous sont peu habituels. Penser une éducation en vue d’un développement...

Université de Neuchâtel

Comparison of survey data on wealth in Switzerland

Ravazzini, Laura ; Kuhn, Ursina ; Brulé, Gaël ; Suter, Christian

Beyond income, wealth is one of most relevant components among national and international indicators of household finances. Three surveys that include Switzerland have recently integrated questions about wealth and its components. These surveys are the Swiss Household Panel -SHP- (2016), the Statistics on Income and Living Conditions -CH-SILC- (2015), and the Survey on Health, Ageing and...

Accès public à partir du 30 avr. 2019
Université de Fribourg

Spatial transformation abilities and their relation to later mathematics performance

Frick, Andrea

In: Psychological Research, 2018, p. 1-20

Using a longitudinal approach, this study investigated the relational structure of different spatial transformation skills at kindergarten age, and how these spatial skills relate to children’s later mathematics performance. Children were tested at three time points, in kindergarten, first grade, and second grade (N = 119). Exploratory factor analyses revealed two subcomponents of spatial...

Accès public à partir du 30 janv. 2021
Université de Fribourg

Spatial scaling, proportional thinking, and numerical understanding in 5- to 7-year-old children

Möhring, Wenke ; Frick, Andrea ; Newcombe, Nora S.

In: Cognitive Development, 2018, vol. 45, p. 57–67

The present study investigated the role of spatial scaling and proportional-reasoning skills in children’s number-line estimations. Proportional strategies in number-line estimations might suggest that correlations between number-line knowledge and scaling are driven by proportional thinking. However, analyses of data on spatial scaling, proportional reasoning, counting skills, and number-line...

Université de Fribourg

The relation between spatial thinking and proportional reasoning in preschoolers

Möhring, Wenke ; Newcombe, Nora S. ; Frick, Andrea

In: Journal of Experimental Child Psychology, 2015, vol. 132, p. 213–220

Previous research has indicated a close link between spatial and mathematical thinking. However, what shared processes account for this link? In this study, we focused on the spatial skill of map reading and the mathematical skill of proportional reasoning and investigated whether scaling, or the ability to relate information in different-sized representations, is a shared process. Scaling was...