Concept

Réaction réversible

Publications associées (57)

Directed evolution of the suicide protein O⁶-alkylguanine-DNA alkyltransferase for increased reactivity results in an alkylated protein with exceptional stability

Ursula Röthlisberger, Kai Johnsson, Florence Pojer, Elizabeth Claire Brunk, Birgit Mollwitz, Simone Schmitt

Here we present a biophysical, structural, and computational analysis of the directed evolution of the human DNA repair protein O-6-alkylguanine-DNA alkyltransferase (hAGT) into SNAP-tag, a self-labeling protein tag. Evolution of hAGT led not only to incre ...

2012

An experimental setup combining a highly sensitive detector for reaction products with a mass-selected cluster source and a low-temperature STM for advanced nanocatalysis measurements

Harald Brune, Wolfgang Harbich, Michael Hugentobler, Simon Bonanni

We report on a home-built detector for catalytic reaction measurements offering good gas isolation from the surrounding ultrahigh vacuum components, high sensitivity for reaction products and a fast response time of 10 ms enabling dynamic studies correlate ...

2011

Selective three-phase hydrogenation of aromatic nitro-compounds over β-molybdenum nitride

Lioubov Kiwi, Fernando Cardenas Lizana, Daniel André Samuel Lamey

A tetragonal molybdenum nitride (β-Mo2N) has been prepared by temperature programmed treatment of MoO3 in flowing N2 + H2 and for the first time shown to catalyze the liquid phase selective hydrogenation (T = 423 K; PH2=11bar) of a series of para-substitut ...

Elsevier2011

Activation Energies for the Rate-Limiting Step in Water Photooxidation by Nanostructured alpha-Fe2O3 and TiO2

Michael Graetzel, Kevin Sivula

Competition between charge recombination and the forward reactions required for water splitting limits the efficiency of metal-oxide photocatalysts. A key requirement for the photochemical oxidation of water on both nanostructured alpha-Fe2O3 and TiO2 is t ...

2011

Ruthenium-Catalyzed Synthesis of 1,5-Dichlorides by Sequential Intermolecular Kharasch Reactions

Rosario Scopelliti, Kay Severin, Aurélien Godinat, Katrin Anne Thommes, Charlotte Buron

Sequential intermolecular atom transfer radical addition reactions of activated dichlorides Cl2CRR′ (R = CN, CO2Et, R′ = H, CN, CO2Et) with two olefins catalyzed by [Cp*RuCl2(PPh3)] in the presence Mg allow the synthesis of linear 1,5-dichlorides. Differen ...

Wiley-Blackwell2011

TEM investigation on zirconate formation and chromium poisoning in LSM/YSZ cathode

Jan Van Herle, Aïcha Hessler-Wyser, Antonin Faes, Zacharie Wuillemin, Josef Andreas Schuler

Cell durability is a crucial technological issue for SOFC commercialization, and considerable progress has been made in recent years. A number of degradation pathways have been established, amongst which microstructural changes, poisoning effects and forma ...

Springer Verlag2011

Implementation of variably saturated flow into PHREEQC for the simulation of biogeochemical reactions in the vadose zone

David Andrew Barry, Laurin Wissmeier

A software tool for the simulation of one-dimensional unsaturated flow and solute transport together with biogeochemical reactions in the vadose zone was developed by integrating a numerical solution of Richards' equation into the geochemical modelling fra ...

Elsevier2010

Microfluidic device for continuous dielectrophoretic separation of cells in division

Philippe Renaud, Thomas Michael Braschler, Nicolas Demierre, Ana Valero

This paper reports on a novel method for on-chip continuous separation of divid- ing and non-dividing cells based on differences in their dielectric properties. By means of two opposite dielectrophoretic force fields at multiple frequencies, the two popula ...

2008

Selectivity of montmorillonite catalyzed prebiotic reactions of D, L-nucleotides

The montmorillonite-catalyzed reactions of the 5′-phosphorimidazolides of D, L-adenosine (D, L-ImpA) (Figure 1a. N = A, R = H) and D, L-uridine (Figure 1a., N = U, R = H) yields oligomers that were as long as 7 mers and 6 mers, respectively. The reactions ...

2007

The heterogeneous interaction of trace gases on mineral dust and soot

Federico Karagulian

The present thesis work deals with the investigation of the heterogeneous reactions involving nitrate radical (NO3), dinitrogen pentoxide (N2O5) and ozone (O3) on surrogates of atmospheric mineral dust particles characteristic of the troposphere. An additi ...

EPFL2006

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