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352 results on '"Boutin, Céline"'

3. The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project.

Author

Hudson, Lawrence N, Newbold, Tim, Contu, Sara, Hill, Samantha LL, Lysenko, Igor, De Palma, Adriana, Phillips, Helen RP, Alhusseini, Tamera I, Bedford, Felicity E, Bennett, Dominic J, Booth, Hollie, Burton, Victoria J, Chng, Charlotte WT, Choimes, Argyrios, Correia, David LP, Day, Julie, Echeverría-Londoño, Susy, Emerson, Susan R, Gao, Di, Garon, Morgan, Harrison, Michelle LK, Ingram, Daniel J, Jung, Martin, Kemp, Victoria, Kirkpatrick, Lucinda, Martin, Callum D, Pan, Yuan, Pask-Hale, Gwilym D, Pynegar, Edwin L, Robinson, Alexandra N, Sanchez-Ortiz, Katia, Senior, Rebecca A, Simmons, Benno I, White, Hannah J, Zhang, Hanbin, Aben, Job, Abrahamczyk, Stefan, Adum, Gilbert B, Aguilar-Barquero, Virginia, Aizen, Marcelo A, Albertos, Belén, Alcala, EL, Del Mar Alguacil, Maria, Alignier, Audrey, Ancrenaz, Marc, Andersen, Alan N, Arbeláez-Cortés, Enrique, Armbrecht, Inge, Arroyo-Rodríguez, Víctor, Aumann, Tom, Axmacher, Jan C, Azhar, Badrul, Azpiroz, Adrián B, Baeten, Lander, Bakayoko, Adama, Báldi, András, Banks, John E, Baral, Sharad K, Barlow, Jos, Barratt, Barbara IP, Barrico, Lurdes, Bartolommei, Paola, Barton, Diane M, Basset, Yves, Batáry, Péter, Bates, Adam J, Baur, Bruno, Bayne, Erin M, Beja, Pedro, Benedick, Suzan, Berg, Åke, Bernard, Henry, Berry, Nicholas J, Bhatt, Dinesh, Bicknell, Jake E, Bihn, Jochen H, Blake, Robin J, Bobo, Kadiri S, Bóçon, Roberto, Boekhout, Teun, Böhning-Gaese, Katrin, Bonham, Kevin J, Borges, Paulo AV, Borges, Sérgio H, Boutin, Céline, Bouyer, Jérémy, Bragagnolo, Cibele, Brandt, Jodi S, Brearley, Francis Q, Brito, Isabel, Bros, Vicenç, Brunet, Jörg, Buczkowski, Grzegorz, Buddle, Christopher M, Bugter, Rob, Buscardo, Erika, Buse, Jörn, Cabra-García, Jimmy, Cáceres, Nilton C, and Cagle, Nicolette L

Subjects
data sharing, global biodiversity modeling, global change, habitat destruction, land use, Ecology, Evolutionary Biology
Abstract

The PREDICTS project-Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)-has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used this evidence base to develop global and regional statistical models of how local biodiversity responds to these measures. We describe and make freely available this 2016 release of the database, containing more than 3.2 million records sampled at over 26,000 locations and representing over 47,000 species. We outline how the database can help in answering a range of questions in ecology and conservation biology. To our knowledge, this is the largest and most geographically and taxonomically representative database of spatial comparisons of biodiversity that has been collated to date; it will be useful to researchers and international efforts wishing to model and understand the global status of biodiversity.

Published
2017

4. Predicting bee community responses to land-use changes: Effects of geographic and taxonomic biases.

Author

De Palma, Adriana, Abrahamczyk, Stefan, Aizen, Marcelo A, Albrecht, Matthias, Basset, Yves, Bates, Adam, Blake, Robin J, Boutin, Céline, Bugter, Rob, Connop, Stuart, Cruz-López, Leopoldo, Cunningham, Saul A, Darvill, Ben, Diekötter, Tim, Dorn, Silvia, Downing, Nicola, Entling, Martin H, Farwig, Nina, Felicioli, Antonio, Fonte, Steven J, Fowler, Robert, Franzén, Markus, Goulson, Dave, Grass, Ingo, Hanley, Mick E, Hendrix, Stephen D, Herrmann, Farina, Herzog, Felix, Holzschuh, Andrea, Jauker, Birgit, Kessler, Michael, Knight, ME, Kruess, Andreas, Lavelle, Patrick, Le Féon, Violette, Lentini, Pia, Malone, Louise A, Marshall, Jon, Pachón, Eliana Martínez, McFrederick, Quinn S, Morales, Carolina L, Mudri-Stojnic, Sonja, Nates-Parra, Guiomar, Nilsson, Sven G, Öckinger, Erik, Osgathorpe, Lynne, Parra-H, Alejandro, Peres, Carlos A, Persson, Anna S, Petanidou, Theodora, Poveda, Katja, Power, Eileen F, Quaranta, Marino, Quintero, Carolina, Rader, Romina, Richards, Miriam H, Roulston, T'ai, Rousseau, Laurent, Sadler, Jonathan P, Samnegård, Ulrika, Schellhorn, Nancy A, Schüepp, Christof, Schweiger, Oliver, Smith-Pardo, Allan H, Steffan-Dewenter, Ingolf, Stout, Jane C, Tonietto, Rebecca K, Tscharntke, Teja, Tylianakis, Jason M, Verboven, Hans AF, Vergara, Carlos H, Verhulst, Jort, Westphal, Catrin, Yoon, Hyung Joo, and Purvis, Andy

Subjects
Animals, Bees, Conservation of Natural Resources, Geography
Abstract

Land-use change and intensification threaten bee populations worldwide, imperilling pollination services. Global models are needed to better characterise, project, and mitigate bees' responses to these human impacts. The available data are, however, geographically and taxonomically unrepresentative; most data are from North America and Western Europe, overrepresenting bumblebees and raising concerns that model results may not be generalizable to other regions and taxa. To assess whether the geographic and taxonomic biases of data could undermine effectiveness of models for conservation policy, we have collated from the published literature a global dataset of bee diversity at sites facing land-use change and intensification, and assess whether bee responses to these pressures vary across 11 regions (Western, Northern, Eastern and Southern Europe; North, Central and South America; Australia and New Zealand; South East Asia; Middle and Southern Africa) and between bumblebees and other bees. Our analyses highlight strong regionally-based responses of total abundance, species richness and Simpson's diversity to land use, caused by variation in the sensitivity of species and potentially in the nature of threats. These results suggest that global extrapolation of models based on geographically and taxonomically restricted data may underestimate the true uncertainty, increasing the risk of ecological surprises.

Published
2016

10. Integrated Stopped-Flow Device for the Study of Porous Materials Using Hyperpolarized 129Xe NMR

Author

Li, Jing, Léonce, Estelle, Coutellier, Corentin, Boutin, Céline, Chighine, Kévin, Rivron, Charles, Davidson, Anne, and Berthault, Patrick

Abstract

A simple, low-cost, and efficient device is proposed for the study of porous materials via NMR using small gas probes. Mainly built through additive manufacturing and being equipped with a radiofrequency solenoid microcoil, it only requires tiny quantities of sample and/or gas and is particularly suited for hyperpolarized xenon. The performances of this device have been accessed on a commercial sample of MCM-41 exhibiting multiporosity. Both the delivery mode of hyperpolarized xenon and the stopped-flow system are judged as efficient according to 2D 129Xe self-diffusion and EXSY experiments.

Published
2024
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18. 129Xe ultra-fast Z spectroscopy enables micromolar detection of biosensors on a 1 T benchtop spectrometer

Author

Chighine, Kévin, Léonce, Estelle, Boutin, Céline, Desvaux, Hervé, and Berthault, Patrick

Subjects
Electricity and magnetism, QC501-766, Physics::Instrumentation and Detectors
Abstract

The availability of a benchtop nuclear magnetic resonance (NMR) spectrometer, of low cost and easily transportable, can allow detection of low quantities of biosensors, provided that hyperpolarized species are used. Here we show that the micromolar threshold can easily be reached by employing laser-polarized xenon and cage molecules reversibly hosting it. Indirect detection of caged xenon is made via chemical exchange, using ultra-fast Z spectroscopy based on spatio-temporal encoding. On this non-dedicated low-field spectrometer, several ideas are proposed to improve the signal.

Published
2021

29. $^{129}$Xe NMR-based biosensing on a benchtop spectrometer

Author

Chighine, Kévin, Léonce, Estelle, Boutin, Céline, Desvaux, Hervé, Berthault, Patrick, Laboratoire Structure et Dynamique par Résonance Magnétique (LCF) (LSDRM), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), CEISAM research institute, Palacin, Serge, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)

Subjects
inorganic chemicals, [CHIM.MATE] Chemical Sciences/Material chemistry, integumentary system, cardiovascular diseases, [CHIM.MATE]Chemical Sciences/Material chemistry, circulatory and respiratory physiology
Abstract

International audience; The nuclear polarization of noble gases, such as xenon, can be enhanced by several orders of magnitude through optical pumping, giving rise to very sensitive NMR probes. Moreover, due to its large and deformable electron cloud, xenon exhibits wide chemical shift range (more than 320 ppm for the monoatomic species) and is soluble in most biological fluids. It can be reversibly encapsulated in molecular host systems such as cage-molecules, decorated with ligands in order to target given receptors, and gives rise to sensitive detection of biological events. This two-step procedure, where the xenon host is first introduced and hyperpolarized xenon then delivered, benefits from the difference in resonance frequency between bound xenon and free xenon (in the gas phase or in the dissolved phase) [1]. This work has recently been published in Magnetic Resonance [2].

Published
2021

38. 129Xe Ultrafast Z-spectroscopy enables micromolar detection of biosensors on a 1T benchtop spectrometer

Author

Chighine, Kévin, Léonce, Estelle, Boutin, Céline, Desvaux, Hervé, Berthault, Patrick, Laboratoire Structure et Dynamique par Résonance Magnétique (LCF) (LSDRM), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-17-LCV2-0002,DESIR,Détection Efficace et Sensible d'Intermédiaires Réactionnels par RMN(2017), ANR-19-CE19-0024,PHOENIX,Mesure du pH extracellulaire par RMN du Xenon-129(2019), Palacin, Serge, Détection Efficace et Sensible d'Intermédiaires Réactionnels par RMN - - DESIR2017 - ANR-17-LCV2-0002 - LabCom - VALID, and Mesure du pH extracellulaire par RMN du Xenon-129 - - PHOENIX2019 - ANR-19-CE19-0024 - AAPG2019 - VALID

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, Physics::Instrumentation and Detectors, Physics::Atomic and Molecular Clusters, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract

International audience; The availability of a benchtop NMR spectrometer, of low cost and easily transportable, can allow detection of low quantities of biosensors, provided that hyperpolarized species are used. Here we show that the micromolar threshold can easily be reached, by employing laser-polarized xenon and cage-molecules reversibly hosting it. Indirect detection of caged xenon is made via chemical exchange, using ultrafast Z-spectroscopy based on spatio-temporal encoding. On this non-dedicated low-field spectrometer, several ideas are proposed to improve the signal.

Published
2021
Full Text
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42. Xe Ultrafast Z-spectroscopy enables micromolar detection of biosensors on a 1T benchtop spectrometer

Author

Chighine, Kévin, Léonce, Estelle, Boutin, Céline, Desvaux, Hervé, Berthault, Patrick, Laboratoire Structure et Dynamique par Résonance Magnétique (LCF) (LSDRM), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), ANR-17-LCV2-0002,DESIR,Détection Efficace et Sensible d'Intermédiaires Réactionnels par RMN(2017), and ANR-19-CE19-0024,PHOENIX,Mesure du pH extracellulaire par RMN du Xenon-129(2019)

Subjects
Physics::Instrumentation and Detectors, Physics::Atomic and Molecular Clusters, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract

International audience; The availability of a benchtop NMR spectrometer, of low cost and easily transportable, can allow detection of low quantities of biosensors, provided that hyperpolarized species are used. Here we show that the micromolar threshold can easily be reached, by employing laser-polarized xenon and cage-molecules reversibly hosting it. Indirect detection of caged xenon is made via chemical exchange, using ultrafast Z-spectroscopy based on spatio-temporal encoding. On this non-dedicated low-field spectrometer, several ideas are proposed to improve the signal.

Published
2021

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