Polymer Nanocomposites Containing Functionalised Multiwalled Carbon NanoTubes: a Particular Attention to Polyolefin Based Materials

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Safety of pulsed field ablation in more than 17,000 patients with atrial fibrillation in the MANIFEST-17K study

Pulsed field ablation (PFA) is an emerging technology for the treatment of atrial fibrillation (AF), for which pre-clinical and early-stage clinical data are suggestive of some degree of preferentiality to myocardial tissue ablation without damage to adjacent structures. Here in the MANIFEST-17K study we assessed the safety of PFA by studying the post-approval use of this treatment modality. Of the 116 centers performing post-approval PFA with a pentaspline catheter, data were received from 106 centers (91.4% participation) regarding 17,642 patients undergoing PFA (mean age 64, 34.7% female, 57.8% paroxysmal AF and 35.2% persistent AF). No esophageal complications, pulmonary vein stenosis or persistent phrenic palsy was reported (transient palsy was reported in 0.06% of patients; 11 of 17,642). Major complications, reported for ~1% of patients (173 of 17,642), were pericardial tamponade (0.36%; 63 of 17,642) and vascular events (0.30%; 53 of 17,642). Stroke was rare (0.12%; 22 of 17,642) and death was even rarer (0.03%; 5 of 17,642). Unexpected complications of PFA were coronary arterial spasm in 0.14% of patients (25 of 17,642) and hemolysis-related acute renal failure necessitating hemodialysis in 0.03% of patients (5 of 17,642). Taken together, these data indicate that PFA demonstrates a favorable safety profile by avoiding much of the collateral damage seen with conventional thermal ablation. PFA has the potential to be transformative for the management of patients with AF.Peer reviewe

Des prescriptions décrétales à leur mise en place sur le terrain

Le présent chapitre rend compte d’une interview d’Emmanuel Chaumont réalisée par Ghislain Carlier en préparation à l’atelier « éducation physique » du colloque du CRIPEDIS. Emmanuel Chaumont est non seulement responsable du secteur éducation physique, mais également conseiller pédagogique. De plus, il exerce la fonction de collaborateur pédagogique à la faculté des Sciences de la motricité de l’UCL, ce qui l’amène à superviser les stages d’agrégation de l’enseignement secondaire supérieur en ..

Convenient synthesis of a surface-active alkoxyamine-initiator from styrene oxide - Living/free-radical polymerization of styrene and n-butyl acrylate

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Convenient synthesis of a surface-active alkoxyamineinitiator from styrene oxide Living/free-radical polymerization of styrene and n-butyl acrylate

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Rheological study of diffusion-controlled crosslinking of poly(ethylene-octene) elastomer via peroxide-trapped fumed silica

The radical crosslinking process of poly(ethylene-octene) copolymer (POE) has been done by impregnating dicumyl peroxide (DCP) onto fumed silica. The examination of kinetic progress by means of linear viscoelastic measurements revealed modification in crosslinking kinetics process. First of all, the gel time is delayed when the peroxide is trapped in fumed silica. This reveals a new way for controlling the kinetics of a melt crosslinking reaction. The analysis of rheological kinetic curves and values of the equilibrium modulus, when the reaction is completed, showed that the competition between DCP diffusion and crosslinking reaction is not time dependent in the temperature range 145-170 degrees C However, the POE crosslinking from trapped DCP in fumed silica particles leads to the formation of a less perfect network (the elastic modulus is 1.5 time lower and tan delta 1.7 higher) in comparison with a crosslinking reaction in homogeneous conditions. (C) 2009 Elsevier B.V. All rights reserved

Effect of a Nitroxyle-Based Radical Scavenger on Nanotube Functionalisation with Pentadecane: A Model Compound Study for Polyethylene Grafting onto MWCNTs

International audienceThe radical grafting of pentadecane onto MWCNTs has been investigated. A model for the functionalisation of MWCNTs with molten polyethylene is established, in which a pentadecane radical grafting reaction has been studied in order to determine the reaction conditions necessary to enhance the degree of grafting while minimising side reactions such as radical combination reactions. The effect of a nitroxyle-based radical scavenger (such as TEMPO) on the competition between the recombination of pentadecane radicals and addition to nanotubes has been explored. It was observed that the use of TEMPO resulted in a relatively higher grafting density without excessive pentadecane branching/cross-linking

Synthesis of Polymer Networks by “Living” Free Radical Polymerization and End-Linking Processes

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