A5012155018- Semiconductor materials and devices
- Isotope Analysis in Ecology
- Advancements in Semiconductor Devices and Circuit Design
- Marine Biology and Ecology Research
- Marine and coastal plant biology
- Integrated Circuits and Semiconductor Failure Analysis
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
- Geology and Paleoclimatology Research
- Protist diversity and phylogeny
- Electrostatic Discharge in Electronics
- Algal biology and biofuel production
- Microbial Community Ecology and Physiology
- Enzyme Production and Characterization
- Seaweed-derived Bioactive Compounds
- Coastal wetland ecosystem dynamics
- Ferroelectric and Negative Capacitance Devices
- Hydrogen embrittlement and corrosion behaviors in metals
- Semiconductor materials and interfaces
- Microstructure and Mechanical Properties of Steels
- Silicon and Solar Cell Technologies
- Metabolomics and Mass Spectrometry Studies
- Silicon Carbide Semiconductor Technologies
- Microstructure and mechanical properties
- Catalytic Processes in Materials Science
Centre National de la Recherche Scientifique
2013-2023
Station Biologique de Roscoff
2013-2023
Sorbonne Université
2013-2023
Sorbonne Paris Cité
2022
Laboratoire de Biologie Intégrative des Modèles Marins
2021
CEA Grenoble
2002-2017
CEA LETI
2002-2017
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2002-2017
Institut polytechnique de Grenoble
2007-2017
Université Grenoble Alpes
2007-2017
Brown algal phlorotannins are structural analogs of condensed tannins in terrestrial plants and, like plant phenols, they have numerous biological functions. Despite their importance brown algae, phlorotannin biosynthetic pathways been poorly characterized at the molecular level. We found that a predicted type III polyketide synthase genome alga Ectocarpus siliculosus, PKS1, catalyzes major step pathway (i.e., synthesis phloroglucinol monomers from malonyl-CoA). The crystal structure PKS1...
Carrageenans are sulfated α-1,3-β-1,4-galactans found in the cell wall of some red algae that practically valuable for their gelation and biomimetic properties but also serve as a potential carbon source marine bacteria. Carbohydrate degradation has been studied extensively terrestrial plant/bacterial systems, sulfation is not present these cases, meaning enzymes used to degrade carrageenans must possess unique features recognize modifications. To gain insights into features, we have focused...
Brown algae are key components of marine ecosystems and live in association with bacteria that essential for their growth development. Ectocarpus siliculosus is a genetic genomic model brown algae. Here we use this to start disentangling the complex interactions may occur between algal host its associated bacteria. We report genome-sequencing 10 alga-associated genome-based reconstruction metabolic networks. The predicted capacities were then used identify complementarities bacteria,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 494:87-105 (2013) - DOI: https://doi.org/10.3354/meps10564 Temporal variation in organic matter supply kelp forests: linking structure trophic functioning Jean-Charles Leclerc1,2,*, Pascal Riera1,2, Cédric Leroux1,3, Laurent Lévêque1,3, Dominique Davoult1,2 1UPMC Univ Paris 06, Station Biologique de Roscoff,...
Abstract Algal polysaccharides constitute a diverse and abundant reservoir of organic matter for marine heterotrophic bacteria, central to the oceanic carbon cycle. We investigated uptake alginate, major brown macroalgal polysaccharide, by microbial communities from kelp-dominated coastal habitats. Congruent with cell growth rapid substrate utilization, alginate amendments induced decrease in bacterial diversity marked compositional shift towards copiotrophic bacteria. traced 13C derived...
Introduction While crucial to ensuring the production of accurate and high-quality data—and avoid erroneous conclusions—data quality control (QC) in environmental monitoring datasets is still poorly documented. Methods With a focus on annual inter-laboratory comparison (ILC) exercises performed context French coastal SOMLIT network, we share here pragmatic approach QC, which allows calculation systematic random errors, measurement uncertainty, individual performance. After an overview...
Neuroglobins, previously thought to be restricted vertebrate neurons, were detected in the brain of a photosymbiotic acoel, Symsagittifera roscoffensis, and neurosensory cells jellyfish Clytia hemisphaerica. For neuroglobin S. member lineage that originated either at base bilateria or deuterostome clade, we report ligand binding properties, crystal structure 2.3 Å, immunocytochemical pattern. We also describe situ hybridizations two neuroglobins specifically expressed differentiating...
Abstract Kelp holdfasts are highly reticulated structures which host a large diversity of small fauna. These microhabitats have been reported to play crucial role in the biodiversity associated kelp forest ecosystems. This study aimed at identifying trophic links and main food sources sustaining webs within communities with holdfasts, through stable isotope (δ 13 C δ 15 N) approach. Sampling invertebrates inhabiting Laminaria digitata their potential sources, took place February May 2007....
Although the composition of invertebrate assemblages associated with kelps has motivated several studies in recent past, little is known about smaller, understorey macroalgae these ecosystems. Here, living within a kelp (Laminaria digitata) forest been studied over two sampling dates, and structure food web investigated using stable isotopes. A total 145 species mobile fauna, mainly amphipods gastropods, were identified. differences date-dependent, we showed that three considered (Palmaria...
Many electrical properties of metal/high-k gate stack are dominated by defects. These defects play an important role in reliability issues particular positive bias temperature instabilities (PBTI). In this paper, we investigate PBTI with a time resolved measurement technique allowing large-scale characterization. This allows us to separate different mechanisms, namely fast and slow trapping, newly stress-generated traps finally charges. We clearly evidence which them or not activated...
A systematic study of mobility performances and BTI reliability was done in advanced dielectrics stacks. By reducing the oxide films thicknesses T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">HK</sub> les2.5 nm, PBTI becomes generally very low associated lifetimes are always over 10 years. studying a large variety dielectric stacks we also clearly demonstrate that performances, interface defects Nit NBTI strongly correlated. All affected by...
Inferring genome-scale metabolic networks in emerging model organisms is challenged by incomplete biochemical knowledge and partial conservation of pathways during evolution. Therefore, specific bioinformatic tools are necessary to infer reactions structures that can be checked experimentally. Using an integrative approach combining genomic metabolomic data the red algal Chondrus crispus, we show that, even considered as conserved, like sterols or mycosporine-like amino acid synthesis...
Coastal marine ecosystems, which play a crucial role in the biogeochemical and ecological functioning of Earth, are highly sensitive to combined effects climate human activities. Because their location, coastal ecosystems directly influenced by activities, but it remains challenging assess spatial temporal scales at influences ecosystems. We monitored 12 sampling stations, distributed 8 France, over 2 decades for physico-biogeochemical parameters (temperature, salinity, concentrations...