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Affichage des publications 791 à 800 sur 874 au total

Chimie-Physique

Assessment of cellular actin dynamics by measurement of fluorescence anisotropy

To study cellular actin dynamics, a cell-free assay based on fluorescence anisotropy was developed. Using G-actin-Alexa as a probe, we found that anisotropy enhancement reflects F-actin elongation. Anisotropy enhancement varies with the…

Jean-Alexis Spitz, Valérie Polard, Andrei V. Maksimenko, Frédéric Subra, Catherine Baratti-Elbaz, Rachel Méallet-Renault, Robert Bernard Pansu, Patrick Tauc, Christian Auclair

Analytical Biochemistry -

Optique

Excitation transfer and luminescence in porphyrin-carbon nanotube complexes

Functionalization of carbon nanotubes with hydrosoluble porphyrins (TPPS) is achieved by "$\pi$-stacking". The porphyrin/nanotube interaction is studied by means of optical absorption, photoluminescence and photoluminescence excitation…

Gurvan Magadur, Jean‐sébastien Lauret, Valérie Alain-Rizzo, C. Voisin, Ph. Roussignol, Emmanuelle Deleporte, Jacques Delaire

Génie chimique

Fluorescence lifetime imaging microscopy for in situ observation of the nanocrystallization of rubrene in a micro fluidic set up

A 3D hydrodynamic focusing microreactor was used to observe the in situ nanocrystallization of rubrene by fluorescence lifetime imaging (FLIM). The crystallization is achieved by a precipitation method based on the addition of a non-solvent. The…

Serge Desportes, Zenji Yatabe, Sébastien Baumlin, Valérie Génot, Jean-Pierre Lefèvre, Hideharu Ushiki, Jacques Delaire, Robert Bernard Pansu

Chemical Physics Letters -

Chimie-Physique

A novel microfluidic flow-injection analysis device with fluorescence detection for cation sensing. Application to potassium

A microfabricated device has been developed for fluorimetric detection of potassium ions without previous separation. It is based on use of a fluorescent molecular sensor, calix–bodipy, specially designed to be sensitive to and selective for the…

Emilie Destandau, Jean-Pierre Lefèvre, Assia Chouai, Serge Desportes, Marie-Caroline Jullien, Rolland Hierle, Isabelle Leray, Bernard Valeur, Jacques A. Delaire

Analytical and Bioanalytical Chemistry -

Chimie analytique

Fluorescence Lifetime Standards for Time and Frequency Domain Fluorescence Spectroscopy

A series of fluorophores with single-exponential fluorescence decays in liquid solution at 20 °C were measured independently by nine laboratories using single-photon timing and multifrequency phase and modulation fluorometry instruments with lasers…

Noël Boens, Wenwu Qin, Nikola Basaric, Johan Hofkens, Marcel Ameloot, Jean-Pierre Lefèvre, Bernard Valeur, Enrico Gratton, Martin Vandeven, Norberto D. Silvajr, Yves Engelborghs, Katrien Willaert, Alain Sillen, Garry Rumbles, David Phillips, Antonie J. W. G. Visser, Arie van Hoek, Joseph R. Lakowicz, Henryk Malak, Ignacy Gryczynski, Arthur G. Szabo, Don T. Krajcarski, Naoto Tamai, Atsushi Miura

Analytical Chemistry -

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