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Your search keyword '"Derenne, Sylvie"' showing total 10 results
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10 results on '"Derenne, Sylvie"'

1. Characterization of Functional Groups in Estuarine Dissolved Organic Matter by DNP‐enhanced 15 N and 13 C Solid‐State NMR

Author

Venel, Florian, primary, Nagashima, Hiroki, additional, Rankin, Andrew G. M., additional, Anquetil, Christelle, additional, Klimavicius, Vytautas, additional, Gutmann, Torsten, additional, Buntkowsky, Gerd, additional, Derenne, Sylvie, additional, Lafon, Olivier, additional, Huguet, Arnaud, additional, and Pourpoint, Frédérique, additional

Published
2021
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5. An interlaboratory study of TEX86 and BIT analysis of sediments, extracts, and standard mixtures

Author

Schouten, Stefan, Hopmans, Ellen C., Rosell-Melé, Antoni, Pearson, Ann, Adam, Pierre, Bauersachs, Thorsten, Bard, Edouard, Bernasconi, Stefano M., Bianchi, Thomas S., Brocks, Jochen J., Carlson, Laura Truxal, Castañeda, Isla S., Derenne, Sylvie, Selver, Ayça Doğrul, Dutta, Koushik, Eglinton, Timothy, Fosse, Celine, Galy, Valier, Grice, Kliti, Hinrichs, Kai-Uwe, Huang, Yongsong, Huguet, Arnaud, Huguet, Carme, Hurley, Sarah, Ingalls, Anitra, Jia, Guodong, Keely, Brendan, Knappy, Chris, Kondo, Miyuki, Krishnan, Srinath, Lincoln, Sara, Lipp, Julius, Mangelsdorf, Kai, Martínez-García, Alfredo, Ménot, Guillemette, Mets, Anchelique, Mollenhauer, Gesine, Ohkouchi, Naohiko, Ossebaar, Jort, Pagani, Mark, Pancost, Richard D., Pearson, Emma J., Peterse, Francien, Reichart, Gert-Jan, Schaeffer, Philippe, Schmitt, Gaby, Schwark, Lorenz, Shah, Sunita R., Smith, Richard W., Smittenberg, Rienk H., Summons, Roger E., Takano, Yoshinori, Talbot, Helen M., Taylor, Kyle W. R., Tarozo, Rafael, Uchida, Masao, van Dongen, Bart E., Van Mooy, Benjamin A. S., Wang, Jinxiang, Warren, Courtney, Weijers, Johan W. H., Werne, Josef P., Woltering, Martijn, Xie, Shucheng, Yamamoto, Masanobu, Yang, Huan, Zhang, Chuanlun L., Zhang, Yige, Zhao, Meixun, Damsté, Jaap S. Sinninghe, Schouten, Stefan, Hopmans, Ellen C., Rosell-Melé, Antoni, Pearson, Ann, Adam, Pierre, Bauersachs, Thorsten, Bard, Edouard, Bernasconi, Stefano M., Bianchi, Thomas S., Brocks, Jochen J., Carlson, Laura Truxal, Castañeda, Isla S., Derenne, Sylvie, Selver, Ayça Doğrul, Dutta, Koushik, Eglinton, Timothy, Fosse, Celine, Galy, Valier, Grice, Kliti, Hinrichs, Kai-Uwe, Huang, Yongsong, Huguet, Arnaud, Huguet, Carme, Hurley, Sarah, Ingalls, Anitra, Jia, Guodong, Keely, Brendan, Knappy, Chris, Kondo, Miyuki, Krishnan, Srinath, Lincoln, Sara, Lipp, Julius, Mangelsdorf, Kai, Martínez-García, Alfredo, Ménot, Guillemette, Mets, Anchelique, Mollenhauer, Gesine, Ohkouchi, Naohiko, Ossebaar, Jort, Pagani, Mark, Pancost, Richard D., Pearson, Emma J., Peterse, Francien, Reichart, Gert-Jan, Schaeffer, Philippe, Schmitt, Gaby, Schwark, Lorenz, Shah, Sunita R., Smith, Richard W., Smittenberg, Rienk H., Summons, Roger E., Takano, Yoshinori, Talbot, Helen M., Taylor, Kyle W. R., Tarozo, Rafael, Uchida, Masao, van Dongen, Bart E., Van Mooy, Benjamin A. S., Wang, Jinxiang, Warren, Courtney, Weijers, Johan W. H., Werne, Josef P., Woltering, Martijn, Xie, Shucheng, Yamamoto, Masanobu, Yang, Huan, Zhang, Chuanlun L., Zhang, Yige, Zhao, Meixun, and Damsté, Jaap S. Sinninghe

Abstract

wo commonly used proxies based on the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) are the TEX86 (TetraEther indeX of 86 carbon atoms) paleothermometer for sea surface temperature reconstructions and the BIT (Branched Isoprenoid Tetraether) index for reconstructing soil organic matter input to the ocean. An initial round-robin study of two sediment extracts, in which 15 laboratories participated, showed relatively consistent TEX86 values (reproducibility ±3–4°C when translated to temperature) but a large spread in BIT measurements (reproducibility ±0.41 on a scale of 0–1). Here we report results of a second round-robin study with 35 laboratories in which three sediments, one sediment extract, and two mixtures of pure, isolated GDGTs were analyzed. The results for TEX86 and BIT index showed improvement compared to the previous round-robin study. The reproducibility, indicating interlaboratory variation, of TEX86 values ranged from 1.3 to 3.0°C when translated to temperature. These results are similar to those of other temperature proxies used in paleoceanography. Comparison of the results obtained from one of the three sediments showed that TEX86 and BIT indices are not significantly affected by interlaboratory differences in sediment extraction techniques. BIT values of the sediments and extracts were at the extremes of the index with values close to 0 or 1, and showed good reproducibility (ranging from 0.013 to 0.042). However, the measured BIT values for the two GDGT mixtures, with known molar ratios of crenarchaeol and branched GDGTs, had intermediate BIT values and showed poor reproducibility and a large overestimation of the “true” (i.e., molar-based) BIT index. The latter is likely due to, among other factors, the higher mass spectrometric response of branched GDGTs compared to crenarchaeol, which also varies among mass spectrometers. Correction for this different mass spectrometric response showed a considerable improvement in the reproducibi

Published
2013

7. Structure, composition, and location of organic matter in the enstatite chondrite Sahara 97096 (EH3)

Author

PIANI, Laurette, primary, ROBERT, François, additional, BEYSSAC, Olivier, additional, BINET, Laurent, additional, BOUROT‐DENISE, Michèle, additional, DERENNE, Sylvie, additional, LE GUILLOU, Corentin, additional, MARROCCHI, Yves, additional, MOSTEFAOUI, Smail, additional, ROUZAUD, Jean‐Noël, additional, and THOMEN, Aurélien, additional

Published
2011
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10. Multiple stages of plant root calcification deciphered by chemical and micromorphological analyses.

Author

Huguet A, Bernard S, El Khatib R, Gocke MI, Wiesenberg GLB, and Derenne S

Subjects
Germany, Carbonates analysis, Plant Roots chemistry
Abstract

Rhizoliths, that is, roots fossilized by secondary carbonates, have been known for ages and are increasingly used for paleoenvironmental reconstructions. However, knowledge about their formation mechanisms remains limited. This study reports the mineralogical and chemical characterization of rhizoliths at different stages of mineralization and fossilization in the Late Pleistocene loess-paleosol sequence of Nussloch (SW Germany). Scanning electron microscopy coupled with elemental mapping and 13 C solid-state nuclear magnetic resonance were used to concomitantly characterize the mineral and organic matter of the rhizoliths. These joint analyses showed for the first time that large rhizoliths are not necessarily remains of single large roots but consist of numerous microrhizoliths as remains of fine roots, formed mainly by calcium carbonates with only low amounts of Mg and Si. They further revealed that the precipitation of secondary carbonates occurs not only around, but also within the plant root and that fossilization leads to the selective preservation of recalcitrant root biopolymers-lignin and suberin. The precipitation of secondary carbonates was observed to occur first around fine roots, the epidermis acting as a first barrier, and then within the root, within the cortex cells, and even sometimes around the phloem and within the xylem. This study suggests that the calcification of plant roots starts during the lifetime of the plant and continues after its death. This has to be systematically investigated to understand the stratigraphic context before using (micro)rhizoliths for paleoenvironmental reconstructions in terrestrial sediments., (© 2020 John Wiley & Sons Ltd.)

Published
2021
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