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584 results on '"P, Bachellier"'

1. Prognosis Associated with Complete Pathological Response Following Neoadjuvant Treatment for PancreaTic AdenOcarciNOma in the FOFLIRINOX Era: the Multicenter TONO Study

Author

Addeo, Pietro, Muzzolini, Milena, Laurent, Christophe, Heyd, Bruno, Sauvanet, Alain, Garnier, Jonathan, Alfano, Marie Sophie, Gaujoux, Sebastien, De Ponthaud, Charles, Marchese, Ugo, Da Silva, Doris, Buc, Emmanuel, Souche, Regis, Fabre, Jean Michel, Colombo, Pierre-Emanuel, Ferre, Lorenzo, Foguenne, Maxime, Hubert, Catherine, El Amrani, Mehdi, Truant, Stephanie, Schwartz, Lilian, Regenet, Nicolas, Dupre, Aurelien, Brustia, Raffaele, Cherif, Rim, Navez, Julie, Darnis, Benjamin, Facy, Olivier, Grellet, Robin, Piessen, Guillaume, Veziant, Julie, Rhaiem, Rami, Kianmanesh, Reza, Fernandez-De-Sevilla, Elena, Gelli, Maximiliano, Taibi, Abdelkader, Georges, Pauline, Mabrut, Jean Yves, Lesurtel, Mickael, Doussot, Alexandre, and Bachellier, Philippe

Published
2025
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2. ASO Author Reflections: Complete Pathological Response after Neoadjuvant Treatment for Pancreatic Ductal Adenocarcinomas—Curative Surgery in Cured Patients?

Author

Addeo, Pietro, Muzzolini, Milena, Laurent, Christophe, Heyd, Bruno, Sauvanet, Alain, Garnier, Jonathan, Alfano, Marie Sophie, Gaujoux, Sebastien, De Ponthaud, Charles, Marchese, Ugo, Da Silva, Doris, Buc, Emmanuel, Souche, Regis, Fabre, Jean Michel, Colombo, Pierre-Emanuel, Ferre, Lorenzo, Foguenne, Maxime, Hubert, Catherine, El Amrani, Mehdi, Truant, Stephanie, Schwartz, Lilian, Regenet, Nicolas, Dupre, Aurelien, Brustia, Raffaele, Cherif, Rim, Navez, Julie, Darnis, Benjamin, Facy, Olivier, Grellet, Robin, Piessen, Guillaume, Veziant, Julie, Rhaiem, Rami, Kianmanesh, Reza, Fernandez-De-Sevilla, Elena, Gelli, Maximiliano, Taibi, Abdelkader, Georges, Pauline, Mabrut, Jean Yves, Lesurtel, Mickael, Doussot, Alexandre, and Bachellier, Philippe

Published
2025
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4. ASO Visual Abstract: Prognosis Associated with Complete Pathological Response Following Neoadjuvant Treatment for Pancreatic AdenOcarciNOma in the FOFLIRINOX Era: The Multicenter TONO Study

Author

Addeo, Pietro, Muzzolini, Milena, Laurent, Christophe, Heyd, Bruno, Sauvanet, Alain, Garnier, Jonathan, Alfano, Marie Sophie, Gaujoux, Sebastien, De Ponthaud, Charles, Marchese, Ugo, Da Silva, Doris, Buc, Emmanuel, Souche, Regis, Fabre, Jean Michel, Colombo, Pierre-Emanuel, Ferre, Lorenzo, Foguenne, Maxime, Hubert, Catherine, Amrani, Mehdi El, Truant, Stephanie, Schwartz, Lilian, Regenet, Nicolas, Dupre, Aurelien, Brustia, Raffaele, Cherif, Rim, Navez, Julie, Darnis, Benjamin, Facy, Olivier, Grellet, Robin, Piessen, Guillaume, Veziant, Julie, Rhaiem, Rami, Kianmanesh, Reza, Fernandez-De-Sevilla, Elena, Gelli, Maximiliano, Thaibi, Abdelkader, Georges, Pauline, Mabrut, Jean Yves, Lesurtel, Mickael, Doussot, Alexandre, and Bachellier, Philippe

Published
2025
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16. Correction: End-ischemic hypothermic oxygenated perfusion for extended criteria donors in liver transplantation: a multicenter, randomized controlled trial—HOPExt

Author

Pradat, Pierre, Pantel, Solene, Maynard, Marianne, Lalande, Laure, Thevenon, Sylvie, Adam, Rene, Allard, Marc-Antoine, Robin, Fabien, Rayar, Michel, Boleslawski, Emmanuel, Scatton, Olivier, Chirica, Mircea, Faitot, François, Bachellier, Philippe, Soubrane, Olivier, Mohkam, Kayvan, Mabrut, Jean-Yves, and Lesurtel, Mickaël

Published
2023
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17. End-ischemic hypothermic oxygenated perfusion for extended criteria donors in liver transplantation: a multicenter, randomized controlled trial—HOPExt

Author

Pradat, Pierre, Pantel, Solene, Maynard, Marianne, Lalande, Laure, Thevenon, Sylvie, Adam, Rene, Allard, Marc-Antoine, Robin, Fabien, Rayar, Michel, Boleslawski, Emmanuel, Scatton, Olivier, Chirica, Mircea, Faitot, François, Bachellier, Philippe, Soubrane, Olivier, Mohkam, Kayvan, Mabrut, Jean-Yves, and Lesurtel, Mickaël

Published
2023
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24. Vibron-assisted spin excitation in a magnetically anisotropic nickelocene complex

Author

Bachellier, N., Verlhac, B., Garnier, L., Zaldívar, J., Rubio-Verdú, C., Abufager, P., Ormaza, M., Choi, D. -J., Bocquet, M. -L., Pascual, J. I., Lorente, N., and Limot, L.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons
Abstract

The ability to electrically-drive spin excitations in molecules with magnetic anisotropy is key for high-density storage and quantum-information technology. Electrons, however, also tunnel via the vibrational excitations unique to a molecule. The interplay of spin and vibrational excitations offers novel routes to study and, ultimately, electrically manipulate molecular magnetism. Here we use a scanning tunneling microscope to electrically induce spin and vibrational excitations in a single molecule consisting of a nickelocene magnetically coupled to a Ni atom. We evidence a vibron-assisted spin excitation at an energy one order of magnitude higher compared to the usual spin excitations of nickelocene and explain it using first-principles calculations that include electron correlations. Furthermore, we observe that spin excitations can be quenched by modifying the Ni-nickelocene coupling. Our study suggests that nickelocene-based complexes constitute a model playground for exploring the interaction of spin and vibrations in the electron transport through single magnetic molecules.

Published
2019
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26. Atomic-scale spin sensing with a single-molecule at the apex of a scanning tunneling microscope

Author

Verlhac, B., Bachellier, N., Garnier, L., Ormaza, M., Abufager, P., Robles, R., Bocquet, M. -L., Ternes, M., Lorente, N., and Limot, L.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Recent advances in scanning probe techniques rely on the chemical functionalization of the probe-tip termination by a single molecule. The success of this approach opens the tantalizing prospect of introducing spin sensitivity through the functionalization by a magnetic molecule. Here, we use a nickelocene-terminated tip (Nc-tip), which offers the possibility of producing spin excitations on the tip apex of a scanning tunneling microscope (STM). We show that when the Nc-tip is a hundred pm away from point contact with a surface-supported object, magnetic effects may be probed through changes in the spin excitation spectrum of nickelocene. We use this detection scheme to simultaneously determine the exchange field and the spin polarization of the sample with atomic-scale resolution. Our findings demonstrate that the Nc-tip is a powerful probe for investigating surface magnetism with STM, from single magnetic atoms to surfaces.

Published
2019
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31. Spin-flip scattering selection in a controlled molecular junction

Author

Ormaza, M., Abufager, P., Verlhac, B., Bachellier, N., Bocquet, M. -L., Lorente, N., and Limot, L.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

A simple double-decker molecule with magnetic anisotropy, nickelocene, is attached to the metallic tip of a low-temperature scanning tunneling microscope. In the presence of a Cu(100) surface, the conductance around the Fermi energy is governed by spin-flip scattering, the nature of which is determined by the tunneling barrier thickness. The molecular tip exhibits inelastic spin-flip scattering in the tunneling regime, while in the contact regime a Kondo ground state is stabilized causing an order of magnitude change in the zero-bias conductance. First principle calculations show that nickelocene reversibly switches from a spin 1 to 1/2 between the two transport regimes., Comment: 5 pages, 5 figures

Published
2017

34. Single-molecule enhanced spin-flip detection

Author

Ormaza, M., Bachellier, N., Faraggi, M. N., Verlhac, B., Abufager, P., Ohresser, P., Joly, L., Romeo, M., Scheurer, F., Bocquet, M. -L., Lorente, N., and Limot, L.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

We studied the spin-flip excitations of a double-decker nickelocene molecule (Nc) adsorbed on Cu(100) by means of inelastic tunneling spectroscopy (IETS), X-ray magnetic circular dichroism (XMCD) and density functional theory calculations (DFT). The results show that the molecule preserves its magnetic moment and magnetic anisotropy not only on Cu(100), but also in different metallic environments including the tip apex. Taking advantage of the efficient spin-flip excitation of this molecule, we show how such a molecular functionalized tip boosts the inelastic signal of a surface supported Nc by almost one order of magnitude thanks to a double spin-excitation process.

Published
2016

35. Kondo resonance of a Co atom exchange coupled to a ferromagnetic tip

Author

Choi, D. -J., Guissart, S., Ormaza, M., Bachellier, N., Bengone, O., Simon, P., and Limot, L.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons
Abstract

The Kondo effect of a Co atom on Cu(100) was investigated with a low-temperature scanning tunneling microscope using a monoatomically sharp nickel tip. Upon a tip-Co contact, the differential conductance spectra exhibit a spin-split asymmetric Kondo resonance. The computed ab initio value of the exchange coupling is too small to suppress the Kondo effect, but sufficiently large to produce the splitting observed. A quantitative analysis of the line shape using the numerical renormalization group technique indicates that the junction spin polarization is weak., Comment: 5 pages, 4 figures

Published
2016
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42. Minimally invasive versus open distal pancreatectomy for resectable pancreatic neuroendocrine tumors: A propensity score matched multicentric comparative French study.

Author

Addeo, Pietro, de Mathelin, Pierre, Doussot, Alexandre, Durin, Thibault, Canali, Giulia, Marchese, Ugo, Sauvanet, Alain, Dokmak, Safi, Cherkaoui, Zineb, Fuks, David, Laurent, Christophe, André, Marie, Ayav, Ahmet, Magallon, Cloe, Turrini, Olivier, Sulpice, Laurent, Robin, Fabien, Bachellier, Philippe, Souche, François-Régis, and Bardol, Thomas

Abstract

Minimally invasive surgery has gained momentum for left pancreatic resections. However, debate remains about whether it has any advantage over open surgery for distal pancreatectomy for pancreatic neuroendocrine tumors. This retrospective review examined pancreatectomies performed for resectable pancreatic neuroendocrine tumors at 21 centers in France between January 2014 and December 2018. Short and long-term outcomes were compared before and after propensity score matching based on tumor size, sex, age, body mass index, center, and method of pancreatic transection. During the period study, 274 patients underwent left pancreatic resection for pancreatic neuroendocrine tumors [109 underwent distal splenopancreatectomy, and 165 underwent spleen-preserving distal pancreatectomy [(splenic vessel preservation (n = 97; 58.7%)/splenic vessel resection (n = 68; 41.3%)]. Before propensity score matching, minimally invasive surgery was associated with a lower rate of major morbidity (P =.004), lower rate of postoperative delayed gastric emptying (P =.04), and higher rate of "textbook" outcomes (P =.04). After propensity score matching, there were 2 groups of 54 patients (n = 30 distal splenopancreatectomy; n = 78 spleen-preserving distal pancreatectomy). Minimally invasive surgery was associated with less blood loss (P =.05), decreased rate of major morbidity (6% vs. 24%; P =.02), less delayed gastric emptying (P =.05) despite similar rates of postoperative fistula, hemorrhage, and reoperation (P >.05). The 5-year overall survival (79% vs. 75%; P =.74) and recurrence-free survival (10% vs 17%; P =.39) were similar. Minimally invasive surgery for left pancreatic resection can be safely proposed for patients with resectable left pancreatic neuroendocrine tumors. Minimally invasive surgery decreases the rate of major complications while providing comparable long-term oncologic outcomes. [Display omitted] [ABSTRACT FROM AUTHOR]

Published
2024
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43. The impact of cirrhosis on short and long postoperative outcomes after distal pancreatectomy.

Author

Coinsin, Benjamin, Durin, Thibault, Marchese, Ugo, Sauvanet, Alain, Dokmak, Safi, Cherkaoui, Zineb, Fuks, David, Laurent, Christophe, Magallon, Cloe, Turrini, Olivier, Sulpice, Laurent, Robin, Fabien, Bachellier, Philippe, Addeo, Piettro, Birnbaum, David Jérémie, Roussel, Edouard, Schwarz, Lilian, Regimbeau, Jean-Marc, Piessen, Guillaume, and Liddo, Guido

Abstract

The impact of cirrhosis on the postoperative outcomes of distal pancreatectomy is yet to be reported. We aimed to evaluate the outcomes of distal pancreatectomy in patients with cirrhosis. We conducted a retrospective, multicentric study patients with cirrhosis who underwent planned distal pancreatectomy between 2008 and 2020 in French high volume centers. Patients with cirrhosis were matched 1:4 for demographic, surgical, and histologic criteria with patients without cirrhosis. The primary endpoint was severe morbidity (Clavien-Dindo grade ≥III). The secondary endpoints were postoperative complications, specifically related to cirrhosis and pancreatic surgery, and survival for patients with pancreatic adenocarcinoma. Overall, 32 patients with cirrhosis were matched with 128 patients without cirrhosis. Most patients (93.5%) had Child-Pugh A cirrhosis. The severe morbidity rate after distal pancreatectomy was higher in patients with cirrhosis than in those without cirrhosis (28.13% vs 25.75%, P =.11. The operative time was significantly longer in the cirrhotic group compared with controls (P =.01). However, patients with and without cirrhosis had comparable blood loss and conversion rates. Postoperatively, the two groups had similar rates of pancreatic fistula, hemorrhage, reoperation, postoperative mortality, and survival rates at 1, 3, and 5 years. The current study suggests that distal pancreatectomy in high-volume centers is feasible for patients with compensated cirrhosis. [ABSTRACT FROM AUTHOR]

Published
2024
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