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Université de Fribourg

Permian magmatism and metamorphism in the Dent Blanche nappe: constraints from field observations and geochronology

Manzotti, Paola ; Rubatto, Daniela ; Zucali, Michele ; El Korh, Afifé ; Cenki-Tok, Bénédicte ; Ballèvre, Michel ; Engi, Martin

In: Swiss Journal of Geosciences, 2018, vol. 111, no. 1–2, p. 79–97

In the Dent Blanche Tectonic System, the Mont Morion biotite-bearing granite is a km- scale intrusion preserved in a low-strain volume. Zircon saturation thermometry suggests that it crystallised from a melt that reached about 800 °C. U–Pb zircon and allanite geochronology indicates crystallization of the magma in the Permian (290 ± 3 Ma; 280 ± 8 Ma, respectively). Migmatitic...

Université de Fribourg

Mapping and quantifying sediment transfer between the front of rapidly moving rock glaciers and torrential gullies

Kummert, Mario ; Delaloye, Reynald

In: Geomorphology, 2018, vol. 309, p. 60–76

The sedimentary connection which may occur between the front of active rock glaciers and torrential channels is not well understood, despite its potential impact on the torrential activity characterizing the concerned catchments. In this study, DEMs of difference (DoDs) covering various time intervals between 2013 and 2016 were obtained from LiDAR-derived multitemporal DEMs for three rapidly...

Université de Fribourg

New biostratigraphical data for the Burdigalian Montchaibeux Member at the locality Courrendlin-Solé (Canton of Jura, Switzerland)

Prieto, Jérôme ; Becker, Damien ; Rauber, Gaëtan ; Pirkenseer, Claudius M.

In: Swiss Journal of Geosciences, 2018, vol. 111, no. 1–2, p. 1–11

Geological surveys were carried out in the Miocene deposits at the place known as “En Solé” east of the village Courrendlin (Delémont Basin, Canton of Jura, Switzerland). This resulted in the discovery of new Miocene small mammal assemblages. The association of the rodents Megacricetodon aff. collongensis and Melissiodon sp. allows to biochronostratigraphically correlate for the first...

Université de Fribourg

Synthesis and biophysical characterization of an odd-numbered 1,3-diamidophospholipid

Neuhaus, Frederik ; Mueller, Dennis ; Tanasescu, Radu ; Balog, Sandor ; Takashi Ishikawa ; Brezesinski, Gerald ; Zumbuehl, Andreas

In: Langmuir, 2018, vol. 34, no. 10, p. 3215–3220

Nanomedicine suffers from low drug delivery efficiencies. Mechanoresponsive vesicles could provide an alternative way to release active compounds triggered by the basic physics of the human body. 1,3-Diamidophospholipids with C16 tails proved to be an effective building block for mechanoresponsive vesicles, but their low main phase transition temperature prevents an effective application in...

Université de Fribourg

Facile and rapid formation of giant vesicles from glass beads

Tanasescu, Radu ; Mettal, Ute ; Colom, Adai ; Roux, Aurélien ; Zumbuehl, Andreas

In: Polymers, 2018, vol. 10, no. 1, p. 54

Giant vesicles (GVs) are widely-used model systems for biological membranes. The formulation of these vesicles, however, can be problematic and artifacts, such as degraded molecules or left-over oil, may be present in the final liposomes. The rapid formulation of a high number of artifact-free vesicles of uniform size using standard laboratory equipment is, therefore, highly desirable. Here,...

Université de Fribourg

Against the rules: pressure induced transition from high to reduced order

Neuhaus, Frederik ; Mueller, Dennis ; Tanasescu, Radu ; Stefaniu, Cristina ; Zaffalon, Pierre-Léonard ; Balog, Sandor ; Ishikawa, Takashi ; Reiter, Renate ; Brezesinski, Gerald ; Zumbuehl, Andreas

In: Soft Matter, 2018, vol. 14, no. 19, p. 3978–3986

Envisioning the next generation of drug delivery nanocontainers requires more in- depth information on the fundamental physical forces at play in bilayer membranes. In order to achieve this, we combine chemical synthesis with physical–chemical analytical methods and probe the relationship between a molecular structure and its biophysical properties. With the aim of increasing the number of...

Université de Fribourg

Reinforced and superinsulating silica aerogel through in situ cross-linking with silane terminated prepolymers

Iswar, Subramaniam ; Snellings, Geert M. B. F. ; Zhao, Shanyu ; Erni, Rolf ; Bahk, Yeon Kyoung ; Wangd, Jing ; Lattuada, Marco ; Koebel, Matthias M. ; Malfait, Wim J.

In: Acta Materialia, 2018, vol. 147, p. 322–328

Silica aerogels have only half the thermal conductivity of conventional insulation, but their application potential is limited by the poor mechanical properties. The fragility arises from the thin necks between the silica nanoparticle building blocks. Here, we produce strong silica aerogels through co-gelation of the polyethoxydisiloxane precursor with a variety of silane terminated...

Université de Fribourg

Bioinspired stimuli-responsive color-changing systems

Isapour, Golnaz ; Lattuada, Marco

In: Advanced Materials, 2018, vol. 30, no. 19, p. 1707069

Stimuli-responsive colors are a unique characteristic of certain animals, evolved as either a method to hide from enemies and prey or to communicate their presence to rivals or mates. From a material science perspective, the solutions developed by Mother Nature to achieve these effects are a source of inspiration to scientists for decades. Here, an updated overview of the literature on...

Université de Fribourg

Functional metathesis catalyst through ring closing enyne metathesis: one pot protocol for living heterotelechelic polymers

Pal, Subhajit ; Lucarini, Fiorella ; Ruggi, Albert ; Kilbinger, Andreas F. M.

In: Journal of the American Chemical Society, 2018, vol. 140, no. 9, p. 3181–3185

Enyne ring closing metathesis has been used to synthesize functional group carrying metathesis catalysts from a commercial (Ru-benzylidene) Grubbs’ catalysts. The new Grubbs-type ruthenium carbene was used to synthesize living heterotelechelic ROMP polymers without any intermediate purification. Olefin metathesis with a mono substituted alkyne followed by ring closing metathesis with an...