Concept

Chrome hexavalent

Publications associées (34)

Chromate Resistance Mechanisms in Leucobacter chromiiresistens

Rizlan Bernier-Latmani, Elena Suvorova Buffat

Chromate is one of the major anthropogenic contaminants on Earth. Leucobacter chromiiresistens is a highly chromate-resistant strain, tolerating chromate concentrations in LB medium of up to 400 mM. In response to chromate stress, L. chromiiresistens forms ...

AMER SOC MICROBIOLOGY2018

Fate of Cr(III) during ozonation of secondary municipal wastewater effluent

Urs von Gunten, Caroline Gachet Aquillon

In the present study, the fate of trivalent chromium (Cr(III)) during ozonation of ultrapurified water and wastewater effluent was investigated. In experiments conducted in phosphate buffered ultrapurified water, O3 alone in excess was inefficient to oxidi ...

2018

Single crystal diamond micro-disk resonators by focused ion beam milling

Niels Quack, Teodoro Graziosi, Sichen Mi

We report on single crystal diamond micro-disk resonators fabricated in bulk chemical vapor deposition diamond plates (3 mm x 3 mm x 0.15 mm) using a combination of deep reactive ion etching and Focused Ion Beam (FIB) milling. The resulting structures are ...

AMER INST PHYSICS2018

Degradation of the Cu Residual Resistivity Ratio in Cr-Plated Composite Nb3Sn Wires

Marco Cantoni, Barbora Bártová, Luca Bottura

Some of the bronze-route Nb3Sn wires produced for the ITER toroidal field magnets have values of the Cu residual resistivity ratio (RRR) lower than the specification (RRR > 100) when reacted with the longest ITER heat treatment cycle (cycle A: high-tempera ...

2015

Diseño de plataformas de estado sólido para la determinación simultánea de cromo III y VI [Design of solid-state platforms for the simultaneous determination of Cr III and VI]

Thomas Maeder, Caroline Jacq

Speciation analyses of an element allow obtaining information on the concentrations of its chemical forms present in specific environments. Chromium is largely distributed in industrial effluents often at acid pH, with the relevant oxidation states Cr (III ...

2013

The Ligand-Based Quintuple Bond-Shortening Concept and Some of Its Limitations

Tobias Bauer

Herein, the ligand-based concept of shortening quintuple bonds and some of its limitations are reported. In dichromium-diguanidinato complexes, the length of the quintuple bond can be influenced by the substituent at the central carbon atom of the used lig ...

Wiley-V C H Verlag Gmbh2013

Terrestrial Accretion Under Oxidizing Conditions

James Badro

The abundance of siderophile elements in the mantle preserves the signature of core formation. On the basis of partitioning experiments at high pressure (35 to 74 gigapascals) and high temperature (3100 to 4400 kelvin), we demonstrate that depletions of sl ...

2013

Screen-printed electrochemical chromium (VI) sensing electrodes for effluent bioremediation monitoring

Peter Ryser, Thomas Maeder, Caroline Jacq

In this work, we introduce a simple, low-cost and acid-resistant materials system for carbon-based screen-printed electrodes (SPEs), and apply it to chemical sensing of hexavalent chromium, i.e. Cr(VI), in acid environments, as encountered in bioremediatio ...

Elsevier Science Bv2012

Méthode de décapage sélective d'un matériau sur un substrate en quartz par l'utilisation d'un faisceau -induit

Patrik Willi Hoffmann, Michel Rossi, Tristan Bret, Xavier Multone

A method and apparatus for local beam processing using a beam activated gas to etch material are described. Compounds are disclosed that are suitable for beam-induced etching. The invention is particularly suitable for electron beam induced etching of chro ...

2012

Chromium Poisoning

Josef Andreas Schuler

This thesis focuses on Cr-poisoning in solid oxide fuel cells (SOFC), which currently presents a key challenge for the development of this technology. By the implementation of dedicated experimental tools, this work offers a new access to, and comprehensio ...

EPFL2012

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