Institution
University of Grenoble
Education•Saint-Martin-d'Hères, France•
About: University of Grenoble is a education organization based out in Saint-Martin-d'Hères, France. It is known for research contribution in the topics: Population & Context (language use). The organization has 25658 authors who have published 45143 publications receiving 909760 citations.
Papers published on a yearly basis
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TL;DR: It is shown that the microalga Chlorella variabilis NC64A harbors a photoenzyme that acts in lipid metabolism that may be useful in light-driven, bio-based production of hydrocarbons, which is named fatty acid photodecarboxylase.
Abstract: Although many organisms capture or respond to sunlight, few enzymes are known to be driven by light. Among these are DNA photolyases and the photosynthetic reaction centers. Here, we show that the microalga Chlorella variabilis NC64A harbors a photoenzyme that acts in lipid metabolism. This enzyme belongs to an algae-specific clade of the glucose-methanol-choline oxidoreductase family and catalyzes the decarboxylation of free fatty acids to n-alkanes or -alkenes in response to blue light. Crystal structure of the protein reveals a fatty acid–binding site in a hydrophobic tunnel leading to the light-capturing flavin adenine dinucleotide (FAD) cofactor. The decarboxylation is initiated through electron abstraction from the fatty acid by the photoexcited FAD with a quantum yield >80%. This photoenzyme, which we name fatty acid photodecarboxylase, may be useful in light-driven, bio-based production of hydrocarbons.
271 citations
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TL;DR: The ALICE VZERO system, made of two scintillator arrays at asymmetric positions, one on each side of the interaction point, plays a central role in ALICE and is used to monitor LHC beam conditions, to reject beam-induced backgrounds and to measure basic physics quantities such as luminosity, particle multiplicity, centrality and event plane direction as mentioned in this paper.
Abstract: ALICE is an LHC experiment devoted to the study of strongly interacting matter in proton-proton, proton-nucleus and nucleus-nucleus collisions at ultra-relativistic energies. The ALICE VZERO system, made of two scintillator arrays at asymmetric positions, one on each side of the interaction point, plays a central role in ALICE. In addition to its core function as a trigger source, the VZERO system is used to monitor LHC beam conditions, to reject beam-induced backgrounds and to measure basic physics quantities such as luminosity, particle multiplicity, centrality and event plane direction in nucleus-nucleus collisions. After describing the VZERO system, this publication presents its performance over more than four years of operation at the LHC.
271 citations
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TL;DR: In this article, the role of anionic (S/Se) distribution and cationic (Cu/Zn) disorder on the open-circuit voltage (Voc) and the ultimate photovoltaic performance of kesterite devices is clarified.
Abstract: Photovoltaic thin film solar cells based on kesterite Cu2ZnSn(Sx,Se1–x)4 compounds (CZTSSe) have reached >12% sunlight-to-electricity conversion efficiency. This is still far from the >20% record devices known in Cu(In1–y,Gay)Se2 and CdTe parent technologies. A selection of >9% CZTSSe devices reported in the literature is examined to review the progress achieved over the past few years. These devices suffer from a low open-circuit voltage (Voc) never better than 60% of the Voc max, which is expected from the Shockley-Queisser radiative limit (S-Q limit). The possible role of anionic (S/Se) distribution and of cationic (Cu/Zn) disorder on the Voc deficit and on the ultimate photovoltaic performance of kesterite devices, are clarified here. While the S/Se anionic distribution is expected to be homogeneous for any ratio x, some grain-to-grain and other non-uniformity over larger area can be found, as quantified on our CZTSSe films. Nevertheless, these anionic distributions can be considered to have a negligible impact on the Voc deficit. On the Cu/Zn order side, even though significant bandgap changes (>10%) can be observed, a similar conclusion is brought from experimental devices and from calculations, still within the radiative S-Q limit. The implications and future ways for improvement are discussed.
270 citations
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Lowell Observatory1, Massachusetts Institute of Technology2, Jet Propulsion Laboratory3, Southwest Research Institute4, Ames Research Center5, Search for extraterrestrial intelligence6, Goddard Space Flight Center7, University of Grenoble8, University of Maryland, College Park9, University of Virginia10, Johns Hopkins University Applied Physics Laboratory11, Stanford University12, Lunar and Planetary Institute13, Space Telescope Science Institute14, Planetary Science Institute15
TL;DR: The New Horizons team presents the complex surface features and geology of Pluto and its large moon Charon, including evidence of tectonics, glacial flow, and possible cryovolcanoes, as well as their analysis of the encounter data downloaded so far.
Abstract: The New Horizons spacecraft mapped colors and infrared spectra across the encounter hemispheres of Pluto and Charon. The volatile methane, carbon monoxide, and nitrogen ices that dominate Pluto's surface have complicated spatial distributions resulting from sublimation, condensation, and glacial flow acting over seasonal and geological time scales. Pluto's water ice "bedrock" was also mapped, with isolated outcrops occurring in a variety of settings. Pluto's surface exhibits complex regional color diversity associated with its distinct provinces. Charon's color pattern is simpler, dominated by neutral low latitudes and a reddish northern polar region. Charon's near-infrared spectra reveal highly localized areas with strong ammonia absorption tied to small craters with relatively fresh-appearing impact ejecta.
270 citations
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TL;DR: The European Commission Sixth Framework Programme as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) as mentioned in this paper was presented by the European Commission in 2015.
Abstract: European Commission Sixth Framework Programme as part of the Optical Infrared Coordination Network for Astronomy (OPTICON)
RII3-Ct-2004-001566
European Commission Seventh Framework Programme as part of the Optical Infrared Coordination Network for Astronomy (OPTICON)
226604
312430
Millennium Science Initiative (Chilean Ministry of Economy)
RC130007
FONDECYT
3150643
Swiss National Science Foundation
SNSF
CONICYT through FONDECYT grant
3170657
project CONICYT PAI/Concurso Nacional Insercion en la Academia, convocatoria 2015
79150049
ICM Nucleo Milenio de Formacion Planetaria, NPF
ANR of France
ANR-16-CE31-0013
Australian Research Council (ARC)
FT170100040
CONICYT FONDECYT grant
1171624
Millennium Nucleus
RC130007
CONICYT-Gemini grant
32130007
270 citations
Authors
Showing all 25961 results
Name | H-index | Papers | Citations |
---|---|---|---|
Dieter Lutz | 139 | 671 | 67414 |
Marcella Bona | 137 | 1391 | 92162 |
Nicolas Berger | 137 | 1581 | 96529 |
Cordelia Schmid | 135 | 464 | 103925 |
J. F. Macías-Pérez | 134 | 486 | 94715 |
Marina Cobal | 132 | 1078 | 85437 |
Lydia Roos | 132 | 1284 | 89435 |
Tetiana Hryn'ova | 131 | 1059 | 84260 |
Johann Collot | 131 | 1018 | 82865 |
Remi Lafaye | 131 | 1012 | 83281 |
Jan Stark | 131 | 1186 | 87025 |
Sabine Crépé-Renaudin | 129 | 1142 | 82741 |
Isabelle Wingerter-Seez | 129 | 930 | 79689 |
James Alexander | 129 | 886 | 75096 |
Jessica Levêque | 129 | 1006 | 70208 |