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New cationic polyelectrolyte as an aid in water management

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New insights into the acid mediated disproportionation of pentavalent uranyl

Marinella Mazzanti

The reaction of benzoic acid with the uranyl(v) complex [(UO 2Py5)(KI2Py2)] in pyridine leads to immediate disproportionation with formation of a hexanuclear U(iv) benzoate cluster, a bis-benzoate complex of uranyl(vi) and water. © 2010 The Royal Society o ...

2010

Water around thermophilic proteins: the role of charged and apolar atoms

The thermal response of three proteins with mesophilic, thermophilic and hyperthermophilic character hints at the essential role played in thermostability by the protein-water interface. The formation of spanning water clusters enveloping the macromolecule ...

2010

Recyclage des eaux usées en irrigation

Yeli Mariam Sou

The present study takes place in Ouagadougou (Burkina Faso), a typical Sub-Saharan city where water shortage and food crisis necessitate wastewater reuse in urban agriculture. Different issues linked to this practice were studied in two components separate ...

EPFL2009

Tuning of photonic crystal cavities by controlled removal of locally infiltrated water

Laurent Balet, Massimo Gurioli

We present a spectral tuning mechanism of photonic crystal microcavities based on microfluidics. The microinfiltration with water of one or few cavity holes and its subsequent controlled evaporation allow us to tune the cavity resonances in a spectral rang ...

American Institute of Physics2009

Bioorganometallic chemistry-from teaching paradigms to medicinal applications

Paul Joseph Dyson, Christian Hartinger

In undergraduate level organometallic chem. courses students are usually taught that organometallic compds. are toxic and unstable in air and water. While this is true of many complexes, some are also non-toxic and stable in air and water. Indeed, bioorgan ...

2009

Switch peptide via Staudinger reaction

Hilal Lashuel

A new transformation based on the Staudinger reaction is described, and its application in the design of a novel switch element to control peptide folding is demonstrated. We found that the azide switch is activated rapidly in water to promote acyl transfe ...

2008

Bromide and iodide removal from waters under dynamic conditions by Ag-doped aerogels

Urs von Gunten

The objective of this study was to analyze the efficiency of Ag-doped aerogels in the removal of bromide and iodide from water. To test the applicability of these aerogels in water treatment, adsorption of bromide and iodide was studied under dynamic condi ...

2007

Oxidative elimination of cyanotoxins: Comparison of ozone, chlorine, chlorine dioxide and permanganate

Urs von Gunten, Eva Maria Rodriguez Franco

As the World Health Organization (WHO) progresses with provisional Drinking Water Guidelines of 1 mu g/L for microcystin-LR and a proposed Guideline of 1 mu g/L for cylindrospermopsin, efficient treatment strategies are needed to prevent cyanotoxins such a ...

2007

Integrated water resources management

Cherryl André de la Porte

Decreasing water availability per capita in more and more countries is the result of bad management over the past centuries. The 'world water crisis', however, is not inevitable. The concept of Integrated Water Resources Management (IWRM) has been promoted ...

EPFL2007

Arsenic sequestration by sorption processes in high-iron sediments

Janet Gordon Hering

High-iron sediments in North Haiwee Reservoir (Olancha, CA), resulting from water treatment for removal of elevated dissolved arsenic in the Los Angeles Aqueduct system, were studied to examine arsenic partitioning between solid phases and porewaters under ...

2007