Affiner les résultats

Langue

Mot clé

Université de Fribourg

Insights into the mechanism of photosynthetic H 2 evolution catalyzed by a heptacoordinate cobalt complex

Lucarini, Fiorella ; Fize, Jennifer ; Morozan, Adina ; Marazzi, Marco ; Natali, Mirco ; Pastore, Mariachiara ; Artero, Vincent ; Ruggi, Albert

In: Sustainable Energy & Fuels, 2020, vol. 4, no. 2, p. 589–599

H2 evolution catalyzed by a heptacoordinate complex under both electro- (1) and photo-chemical (2) conditions is analyzed in detail in order to gain insights into the mechanism of the processes. The complex shows high catalytic activity for hydrogen production in acetonitrile, in the presence of trifluoroacetic acid and triethylammonium tetrafluoroborate as proton sources. Foot-of-the-wave...

Université de Fribourg

Cell cycle constraints and environmental control of local DNA hypomethylation in α-proteobacteria

Ardissone, Silvia ; Redder, Peter ; Russo, Giancarlo ; Frandi, Antonio ; Fumeaux, Coralie ; Patrignani, Andrea ; Schlapbach, Ralph ; Falquet, Laurent ; Viollier, Patrick H.

In: PLOS Genetics, 2016, vol. 12, no. 12, p. e1006499

Heritable DNA methylation imprints are ubiquitous and underlie genetic variability from bacteria to humans. In microbial genomes, DNA methylation has been implicated in gene transcription, DNA replication and repair, nucleoid segregation, transposition and virulence of pathogenic strains. Despite the importance of local (hypo)methylation at specific loci, how and when these patterns are...

Université de Fribourg

Geomorphic response to the lateglacial–holocene transition in high alpine regions (Sanetsch pass, Swiss alps)

Serra, Elena ; Valla, Pierre G. ; Gribenski, Natacha ; Guedes Magrani, Fabio ; Carcaillet, Julien ; Delaloye, Reynald ; Grobéty, Bernard ; Braillard, Luc

In: Boreas, 2020, p. bor.12480

Several palaeoclimatic archives have documented the pronounced climatic and environmental change associated with the Lateglacial–Holocene transition in the European Alps. However, the geomorphic response to this major environmental transition has only been punctually investigated. In this study, we propose a detailed reconstruction of post‐Last Glacial Maximum palaeoenvironmental...

Université de Fribourg

Sampbias, a method for quantifying geographic sampling biases in species distribution data

Zizka, Alexander ; Antonelli, Alexandre ; Silvestro, Daniele

In: Ecography, 2020/n/a/n/a/-

Geo-referenced species occurrences from public databases have become essential to biodiversity research and conservation. However, geographical biases are widely recognized as a factor limiting the usefulness of such data for understanding species diversity and distribution. In particular, differences in sampling intensity across a landscape due to differences in human accessibility are...

Université de Fribourg

Partitioning the uncertainty of ensemble projections of global glacier mass change

Marzeion, Ben ; Hock, Regine ; Anderson, Brian ; Bliss, Andrew ; Champollion, Nicolas ; Fujita, Koji ; Huss, Matthias ; Immerzeel, Walter W. ; Kraaijenbrink, Philip ; Malles, Jan‐Hendrik ; Maussion, Fabien ; Radić, Valentina ; Rounce, David R. ; Sakai, Akiko ; Shannon, Sarah ; Wal, Roderik ; Zekollari, Harry

In: Earth’s Future, 2020, vol. 8, no. 7, p. -

Glacier mass loss is recognized as a major contributor to current sea level rise. However, large uncertainties remain in projections of glacier mass loss on global and regional scales. We present an ensemble of 288 glacier mass and area change projections for the 21st century based on 11 glacier models using up to 10 general circulation models and four Representative Concentration Pathways...