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Université de Fribourg

Assessment of the potential for in-plume sulphur dioxide gas-ash interactions to influence the respiratory toxicity of volcanic ash

Tomašek, Ines ; Damby, David E. ; Horwell, Claire J. ; Ayris, Paul M. ; Delmelle, Pierre ; Ottley, Christopher J. ; Cubillas, Pablo ; Casas, Ana S. ; Bisig, Christoph ; Petri-Fink, Alke ; Dingwell, Donald B. ; Clift, Martin J. D. ; Drasler, Barbara ; Rothen-Rutishauser, Barbara

In: Environmental Research, 2019, vol. 179, p. 108798

Volcanic plumes are complex environments composed of gases and ash particles, where chemical and physical processes occur at different temperature and compositional regimes. Commonly, soluble sulphate- and chloride-bearing salts are formed on ash as gases interact with ash surfaces. Exposure to respirable volcanic ash following an eruption is potentially a significant health concern. The...

Université de Fribourg

Respiratory hazard assessment of combined exposure to complete gasoline exhaust and respirable volcanic ash in a multicellular human lung model at the air-liquid interface

Tomašeka, Ines ; J.Horwell, Claire ; Bisig, Christoph ; E.Damby, David ; Comte, Pierre ; Czerwinski, Jan ; Petri-Finkb, Alke ; J.D.Clift, Martin ; Drasler, Barbara ; Rothen-Rutishauser, Barbara

In: Environmental Pollution, 2018, vol. 238, p. 977–987

Communities resident in urban areas located near active volcanoes can experience volcanic ash exposures during, and following, an eruption, in addition to sustained exposures to high concentrations of anthropogenic air pollutants (e.g., vehicle exhaust emissions). Inhalation of anthropogenic pollution is known to cause the onset of, or exacerbate, respiratory and cardiovascular diseases. It...

Université de Fribourg

Characteristics and properties of nano-LiCoO2 synthesized by pre-organized single source precursors: Li-ion diffusivity, electrochemistry and biological assessment

Brog, Jean?Pierre ; Crochet, Aurélien ; Seydoux, Joël ; Clift, Martin J. D. ; Baichette, Benoît ; Maharajan, Sivarajakumar ; Barosova, Hana ; Brodard, Pierre ; Spodaryk, Mariana ; Züttel, Andreas ; Rothen?Rutishauser, Barbara ; Kwon, Nam Hee ; Fromm, Katharina M.

In: Journal of Nanobiotechnology, 2017, vol. 15, p. 58

LiCoO₂ is one of the most used cathode materials in Li-ion batteries. Its conventional synthesis requires high temperature (>800 °C) and long heating time (>24 h) to obtain the micronscale rhombohedral layered high-temperature phase of LiCoO₂ (HT-LCO). Nanoscale HT-LCO is of interest to improve the battery performance as the lithium (Li⁺) ion pathway is expected to be shorter in...

Université de Fribourg

A novel technique to determine the cell type specific response within an in vitro co-culture model via multi-colour flow cytometry

Clift, Martin J. D. ; Fytianos, Kleanthis ; Vanhecke, Dimitri ; Hočevar, Sandra ; Petri-Fink, Alke ; Rothen-Rutishauser, Barbara

In: Scientific Reports, 2017, vol. 7, no. 1, p. 434

Determination of the cell type specific response is essential towards understanding the cellular mechanisms associated with disease states as well as assessing cell-based targeting of effective therapeutic agents. Recently, there have been increased calls for advanced in vitro multi-cellular models that provide reliable and valuable tools correlative to in vivo. In this pursuit the ability to...

Université de Fribourg

Combined exposure of diesel exhaust particles and respirable Soufrière Hills volcanic ash causes a (pro-)inflammatory response in an in vitro multicellular epithelial tissue barrier model

Tomašek, Ines ; Horwell, Claire J. ; Damby, David E. ; Barošová, Hana ; Geers, Christoph ; Petri-Fink, Alke ; Rothen-Rutishauser, Barbara ; Clift, Martin J. D.

In: Particle and Fibre Toxicology, 2016, vol. 13, p. 67

There are justifiable health concerns regarding the potential adverse effects associated with human exposure to volcanic ash (VA) particles, especially when considering communities living in urban areas already exposed to heightened air pollution. The aim of this study was, therefore, to gain an imperative, first understanding of the biological impacts of respirable VA when exposed...

Université de Fribourg

Synthesis, characterization, antibacterial activity and cytotoxicity of hollow /TiO₂-coated CeO₂ nanocontainers encapsulating silver nanoparticles for controlled silver release

Gagnon, Jacinthe ; Clift, Martin J. D. ; Vanhecke, Dimitri ; Widnersson, I. E. ; Abram, S.-L. ; Petri-Fink, Alke ; Caruso, R. A. ; Rothen-Rutishauser, Barbara ; Fromm, Katharina M.

In: Journal of Materials Chemistry B, 2016, vol. 4, no. 6, p. 1166–1174

Biomaterials as implants are being applied more extensively in medicine due to their on-going development and associated improvements, and the increase in human life expectancy. Nonetheless, biomaterial-related infections, as well as propagating bacterial resistance, remain significant issues. Therefore, there is a growing interest for silver-based drugs because of their efficient and broad-range...

Université de Fribourg

Integrating silver compounds and nanoparticles into ceria nanocontainers for antimicrobial applications

Gagnon, Jacinthe ; Clift, Martin J. D. ; Vanhecke, Dimitri ; Kuhn, Dagmar Alice ; Weber, P. ; Petri-Fink, Alke ; Rothen-Rutishauser, Barbara ; Fromm, Katharina M.

In: Journal of Materials Chemistry B, 2015, vol. 3, no. 9, p. 1760–1768

Silver compounds and nanoparticles (NPs) are gaining increasing interest in medical applications, specifically in the treatment and prevention of biomaterial-related infections. However, the silver release from these materials, resulting in a limited antimicrobial activity, is often difficult to control. In this paper, ceria nanocontainers were synthesized by a template-assisted method and were...

Université de Fribourg

Uptake and intracellular fate of peptide surface-functionalized silica hybrid magnetic nanoparticles in vitro

Digigow, Reinaldo G. ; Vanhecke, Dimitri ; Rothen-Rutishauser, Barbara ; Clift, Martin J.D. ; Petri-Fink, Alke

In: Particle & Particle Systems Characterization, 2015, vol. 32, no. 2, p. 188–196

Recently, the use of nanomaterials as intracellular targeting tools for theranostics has gained heightened interest. Despite the clear advantages posed by surface-functionalized nanoparticles (NPs) in this regard, limited understanding currently exists due to difficulties in reliably synthesizing NPs with surface functionalizations adequate for use in such applications, as well as the manner of...