Jérémy Jacob

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a Petroleum and Environmental Geochemistry Group, Centre for Chemical Sciences, School of Earth, Ocean and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth, Devon, PL4 8AA, UK b Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, Bat.12, 91198 Gif-sur-Yvette Cedex, France c Institut des(More)
233 words) A 19-meter-long sedimentary record retrieved in Lake Aydat (French Massif Central) covers the last 6700 yrs at a high-resolution. A multi-proxy approach (density, magnetic susceptibility, XRF, Rock-Eval, pollen and non-pollen palynomorph analyses and a historical archives study) was used to characterise and propose a model of sedimentation. The(More)
Soil samples collected on Iceland are only exceptionally contaminated with polycyclic hydrocarbons (PCKW). These PCKW originate mainly — perhaps only — from immissions by technical processes. The investigation of a sample of rural soil 100 km distant from civilization yielded a small but detectable content of 12 PCKW resulting from either carbonization of(More)
Two well-dated ca Holocene-long sedimentary sequences from deepest parts of Lake Bourget provide new insights onto the evolution of erosion patterns at a regional scale in NW European Alps. The combination of high resolution geochemistry – XRF core scanning, calibrated by 150 punctual measurements – and isotope geochemistry (ɛNd) of the terrigenous fraction(More)
We present the first results from the AGN Multiwavelength Survey of Early-type galaxies in the Virgo cluster (AMUSE-Virgo). This large program targets 100 early-type galaxies with the Advanced CCD Imaging Spectrometer on board the Chandra X-ray Observatory and the Multi-band Imaging Photometer on board the Spitzer Space Telescope, with the aim of providing(More)
As a part of a wider study aimed at determining new molecular biomarkers in soils and sediments that could be specific of distinct vegetation types with respect to unravelling past changes in land use, we analysed the neutral lipid content of soil developed in the catchment of a small lake in central France. The ketone/acetate lipid fraction of soil under(More)
Dating sedimentary series spanning the past few tens of thousands of years is often problematic due to the quality of 14C data obtained from organic matter (OM), including OM bulk. This question recently arose when establishing the chronology of the sediment infill of the Sarliève palaeolake (French Massif Central). In the studied section of the cores that(More)
Compound-specific δD analyses of land plant-derived biomarkers preserved in lake sediments are gaining increasing interest in paleoclimatic studies because of their potential to record essential information on the climatic conditions that prevailed at the time of their synthesis. The accuracy of inferences about climate from these analyses could be better(More)
The occurrence of 25 drug target residues (illicit drugs or pharmaceutically active compounds) was investigated during 85 consecutive days in the influents of a wastewater treatment plant in the Region Centre-Val de Loire, France. This long tracking period allowed a better understanding of the patterns affecting the occurrence of this type of contaminants.(More)
The spatial heterogeneity of molecular biomarkers preserved in soils and sediments are seldom taken into account in environmental or paleoenvironmental studies. We here examine the distribution of lipids in peat soils in relation to their potential plant sources in the surroundings. The peatland chosen is La Guette peatland (Central France). This site has(More)