Search Results - "Grasset, Laurent"

Assessment of the Efficiency of Chemical and Thermochemical Depolymerization Methods for Lignin Valorization: Principal Component Analysis (PCA) Approach by Younes, Khaled, Moghrabi, Ahmad, Moghnie, Sara, Mouhtady, Omar, Murshid, Nimer, Grasset, Laurent

“…Energy demand and the use of commodity consumer products, such as chemicals, plastics, and transportation fuels, are growing nowadays. These products, which…”
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Application of Unsupervised Learning for the Evaluation of Burial Behavior of Geomaterials in Peatlands: Case of Lignin Moieties Yielded by Alkaline Oxidative Cleavage by Younes, Khaled, Moghnie, Sara, Khader, Lina, Obeid, Emil, Mouhtady, Omar, Grasset, Laurent, Murshid, Nimer

“…Tropical Peatlands accumulate organic matter (OM) and a significant source of carbon dioxide (CO ) and methane (CH ) under anoxic conditions. However, it is…”
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Changes in microbial community structure and function following Sphagnum peatland restoration by Andersen, Roxane, Grasset, Laurent, Thormann, Markus N., Rochefort, Line, Francez, André-Jean

“…This study examines the recovery of the microbial compartment following active restoration of a North American ombrotrophic peatland extracted for…”
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Carbohydrates as proxies in ombrotrophic peatland: DFRC molecular method coupled with PCA by Younes, Khaled, Grasset, Laurent

“…Understanding organic matter (OM) dynamics in peat remains challenging as molecular-level carbohydrate studies of organic geochemistry are still generally…”
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The application of DFRC method for the analysis of carbohydrates in a peat bog: Validation and comparison with conventional chemical and thermochemical degradation techniques by Younes, Khaled, Grasset, Laurent

“…Traditional acid hydrolysis is the main method used for carbohydrates characterization in soils and sediments. It has been used to cleave the glycosidic bond,…”
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Distribution of PAH residues in humic and mineral fractions of sediments from stormwater infiltration basins by El-Mufleh, Amelène, Béchet, Béatrice, Grasset, Laurent, Rodier, Claude, Gaudin, Anne, Ruban, Véronique

“…Purpose The management of sediments from stormwater infiltration basins is nowadays a key issue for local authorities to ensure long-term performance…”
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Plant versus microbial signature in densimetric fractions of Mediterranean forest soils: a study by thermochemolysis gas chromatography mass spectrometry by Rovira, Pere, Grasset, Laurent

“…Purpose Soil organic matter (SOM) ageing may be measured by means of molecular signatures, ratios between organic compounds which inform us about the origin…”
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Hydrogen peroxide oxidation of humic acids and lignite by DOSKOCIL, Leoš, GRASSET, Laurent, VALKOVA, Dana, PEKAR, Miloslav

“…The H2O2 degradation of humic acids and lignite from Mir mine (South Moravian region, Czech Republic) resulted in oxidation of aromatic structures and cleavage…”
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The application of unsupervised machine learning for the elucidation of the burial effect of lignin in peatland: Case of TMAH thermochemolysis by Moghnie, Sara, Obeid, Emil, Halwani, Jalal, Benga, Flavia, Mouhtady, Omar, Saad, Noha, Abdelbaki, Wiem, Younes, Khaled, Grasset, Laurent

“…Lignin is one of the major components of organic macromolecules in peatland. Analysis of lignin in sediments is considered as a valuable tool for understanding…”
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Molecular biomarkers study of an ombrotrophic peatland impacted by an anthropogenic clay deposit by Younes, Khaled, Laduranty, Joëlle, Descostes, Michael, Grasset, Laurent

“…•Insight into molecular composition of an ombrotrophic peatland impacted by an anthropogenic clay deposit.•Lipids, lignin monomers and carbohydrates used as…”
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Comparison between Rock-Eval® and temperature-programmed pyrolysis/mass spectrometry for the analysis of environmental and geological samples by Jacob, Jérémy, Delarue, Frédéric, Copard, Yoann, Le Milbeau, Claude, Grasset, Laurent, Brockmann, Patrick

“…Natural organic matter (OM) has a complex structure whose complete structural and chemical description remains a challenge. Rock-Eval® device constitutes a…”
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Orientation measurements of clay minerals by polarized attenuated total reflection infrared spectroscopy by Grégoire, Brian, Dazas, Baptiste, Hubert, Fabien, Tertre, Emmanuel, Ferrage, Eric, Grasset, Laurent, Petit, Sabine

“…[Display omitted] •Orientation of clay particles was examined by polarized ATR-FTIR spectroscopy.•The appropriate optical constants and equations were…”
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The characterization of South Moravian lignite in its natural and treated forms using thermal degradation methods by Doskočil, Leoš, Enev, Vojtěch, Grasset, Laurent, Wasserbauer, Jaromír

“…•Analyses of the evolved gases and residues are mutually complementary.•The thermal stabilities of different functional groups were investigated.•Treatments of…”
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Ester- and ether bond cleavage in immature kerogens by Amblès, Andre, Grasset, Laurent, Dupas, Germaine, Jacquesy, Jean-Claude

“…Quaternary ammonium salt Aliquat 336 and 18-Crown-6 enhance hydrolysis of Timahdit-M kerogen when used as a phase transfer catalyst. The yield of hydrolysis…”
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Experimental warming differentially affects microbial structure and activity in two contrasted moisture sites in a Sphagnum-dominated peatland by Delarue, Frédéric, Buttler, Alexandre, Bragazza, Luca, Grasset, Laurent, Jassey, Vincent E.J., Gogo, Sébastien, Laggoun-Défarge, Fatima

“…Several studies on the impact of climate warming have indicated that peat decomposition/mineralization will be enhanced. Most of these studies deal with the…”
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Determination of the distribution and speciation of selenium in an argillaceous sample using chemical extractions and post-extractions analyses: application to the hydrogeological experimental site of Poitiers by Bassil, Joseph, Naveau, Aude, Bueno, Maïté, Di Tullo, Pamela, Grasset, Laurent, Kazpard, Véronique, Razack, Moumtaz

“…To better understand selenium’s dynamics in environmental systems, the present study aims to investigate selenium speciation and distribution in black…”
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Study of water-extractable fractions from South Moravian lignite by Doskočil, Leoš, Grasset, Laurent, Enev, Vojtěch, Kalina, Lukáš, Pekař, Miloslav

“…Lignite can be applied directly in natural form on agricultural fields as a soil conditioner. However, there is little information on leaching of risky…”
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TMAH-preparative thermochemolysis for the characterization of organic matter in densimetric fractions of a Mediterranean forest soil by Grasset, Laurent, Rovira, Pere, Amblès, André

“…Physical protection is one of the most important ways for stabilization of organic carbon in soils, and in order to properly manage soils as a sink for carbon,…”
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Molecular compounds generated by ruthenium tetroxide oxidation and preparative off line thermochemolysis of lignite humic acids from South Moravia: Implications for molecular structure by Válková, Dana, Grasset, Laurent, Amblès, André

“…The composition of humic acids (HAs) isolated from a South Moravian lignite deposit was examined via thermochemolysis and RuO 4 oxidation. The combination of…”
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Reactivity and transport mapping of Cu(II) ions in humic hydrogels by Klučáková, Martina, Kalina, Michal, Sedláček, Petr, Grasset, Laurent

“…PURPOSE: Reactivity and transport properties of metal ions are important both for evaluating and understanding role of humic substances in natural systems and…”
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