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Mechanistic Investigations of Nickamine-catalyzed Hydrosilylation of Alkenes: Nickel Nanoparticles Are the Active Species

Hydrosilylation is an important chemical process for the synthesis of organosilanes and for the production of silicone polymers. The wide variety of catalysts developed for this reaction generally follow a Chalk-Harrod, or a sigma-bond metathesis mechanism ...

SWISS CHEMICAL SOC2020

Chelating agents as coating molecules for iron oxide nanoparticles

Heinrich Hofmann, Marijana Mionic Ebersold, Josefina Adriana Maria Bastiaansen, Débora Bonvin

Due to their high chemical affinity towards metal ions, chelating agents (CAs) have been used for decades for water purification, but also for protection against metal intoxication and in nanomedicine as linking molecules at the surface of nanoparticles. H ...

RSC Publishing2017

Mercury tissue residue approach in Chironomus riparius: Involvement of toxicokinetics and comparison of subcellular fractionation methods

Along with the growing body of evidence that total internal concentration is not a good indicator of toxicity, the Critical Body Residue (CBR) approach recently evolved into the Tissue Residue Approach (TRA) which considers the biologically active portion ...

Elsevier Science Bv2016

Metal Distribution and Characterization of Cultivable Lead-Resistant Bacteria in Shooting Range Soils

Aline Sondra Adler

Shooting ranges represent about 10% of polluted sites in Switzerland. This pollution, mainly consisting of lead (Pb) and antimony (Sb), can spread into the local groundwater, wildlife and plants. In this study, shooting range stop butt soils (elevated soil ...

Taylor & Francis Inc2016

Efficiency of SPIONs functionalized with polyethylene glycol bis (amine) for heavy metal removal

Heinrich Hofmann, Yongyuth Wanna

Hybrid magnetic nanoparticles based on poly(methylmethacrylate) (PMMA) and super-paramagnetic iron oxide nanopaticles (SPIONs) with selective surface modification has been developed for heavy metal removal by applying external magnetic fields. The nanopart ...

Elsevier2016

Improving Heterogeneous Catalyst Stability for Liquid-phase Biomass Conversion and Reforming

Jeremy Luterbacher, Florent Emmanuel Héroguel, Bartosz Rozmyslowicz

Biomass is a possible renewable alternative to fossil carbon sources. Today, many bio-resources can be converted to direct substitutes or suitable alternatives to fossil-based fuels and chemicals. However, catalyst deactivation under the harsh, often liqui ...

Schweizerische Chemische Gesellschaft2015

Evaluation of Protective Coatings for SOFC Interconnects

Jan Van Herle, Michele Bianco

Chromium poisoning is a widely recognized degradation process in solid oxide fuel cells (SOFC). Stainless steel interconnect plates, in direct contact with the cathode, have been identified as the major chromium source, raising a need for electrically cond ...

2015

Bioavailability of inorganic nanoparticles to planktonic bacteria and aquatic microalgae in freshwater

Paul Bowen, Nadia Rachel Von Moos

Over the past few years, engineered nanomaterials (ENMs) have penetrated nearly every sector of modern life and their broad-scale use is steadily and rapidly increasing. The (expected) elevated levels of ENMs in the environment raise concerns with regard t ...

Royal Soc Chemistry2014

Three-dimensional microstructural mapping of poisoning phases in the Neodymium Nickelate solid oxide fuel cell cathode

Jan Van Herle, Josef Andreas Schuler, Henning Lübbe, Jun Wang

Nd-Nickelate (NNO), Nd1.95NiO4+delta, an alternative solid oxide fuel cell cathode material, has been imaged and mapped in 3D using synchrotron-based x-ray nanotomography. The NNO cathode material, which suffered from silicon contamination during fabricati ...

Elsevier Science Bv2013

Bioavailable copper modulates oxidative phosphorylation and growth of tumors

Johan Auwerx, Douglas Hanahan, Carole Poitry-Yamate, Pénélope Andreux, Seiko Ishida

Copper is an essential trace element, the imbalances of which are associated with various pathological conditions, including cancer, albeit via largely undefined molecular and cellular mechanisms. Here we provide evidence that levels of bioavailable copper ...

National Academy of Sciences2013

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