Modelling of cheese mechanics and mass transport (carbon dioxide) around an expanding gas bubble in semi-hard cheese: model validation using dynamic and non invasive MRI measurements and sensitivity analysis to mechanical and mass transport parameters

International audienc

Red meat and colorectal cancer: Nrf2-dependent antioxidant response contributes to the resistance of preneoplastic colon cells to fecal water of hemoglobin- and beef-fed rats

Red meat and colorectal cancer: Nrf2-dependent antioxidant response contributes to the resistance of preneoplastic colon cells to fecal water of hemoglobin- and beef-fed rat

The French ICOS ecosystem monitoring sites: an overview

The ICOS research infrastructure include atmospheric, ecosystem and marine station networks. The Ecosystem station network of ICOS (ESN) is based on a number of observation sites for monitoring and understanding the functioning of ecosystems and the exchange of energy and greenhouse gases between the ecosystems and the atmosphere in relation to climate and management. ESN use a large set of standardised instruments to perform continuous and intensive measurement of meteorological and micrometeorological variables. France is a founding member of the ICOS ERIC. The French part ICOS France is a cooperation of several research institutes: INRA, CNRS and ANDRA. The French ICOS ecosystem network is extensive and includes eight observation sites ( 4 Class 1, 4 class 2), in addition seven associated sites also contribute to the network. The network samples a wide range of ecosystems (forest, crop and grassland), of management and of climate (from cold mountain climate, to tropical humid in Guyana, and including wet oceanic and dry Mediterranean climate). A number of sites within the network have a long history of eddy flux measurements with some sites being continuously monitored since 1996 making them pioneer and good candidate for long term carbon cycle observation.We will provide an overview of the sites, and of the measurement system (sensor and data flow). We will then present the current status of the network, recent measurement and preliminary findings

Impact of the deep biosphere on CO2 storage performance

International audienc

The french long-term intensive observation and experimentation network for environmental research in forest ecosystems

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Mesure et suivi du permafrost et du gel du sol dans les montagnes françaises : la contribution du réseau PermaFRANCE à la compréhension des réponses de la cryosphère aux changements globaux. Les changements globaux : enjeux et défis

National audienc

Electrochemical synthesis and characterisation of alternating tripyridyl-dipyrrole molecular strands with multiple nitrogen-based donor-acceptor binding sites.

International audienceSynthesis of alternating pyridine-pyrrole molecular strands composed of two electron-rich pyrrole units (donors) sandwiched between three pyridinic cores (acceptors) is described. The envisioned strategy was a smooth electrosynthesis process involving ring contraction of corresponding tripyridyl-dipyridazine precursors. 2,6-Bis[6-(pyridazin-3-yl)]pyridine ligands 2a-c bearing pyridine residues at the terminal positions were prepared in suitable quantities by a Negishi metal cross-coupling procedure. The yields of heterocyclic coupling between 2-pyridyl zinc bromide reagents 12a-c and 2,6-bis(6-trifluoromethanesulfonylpyridazin-3-yl)pyridine increased from 68 to 95% following introduction of electron-donating methyl groups on the metallated halogenopyridine units. Favorable conditions for preparative electrochemical reduction of tripyridyl-dipyridazines 2b,c were established in THF/acetate buffer (pH 4.6)/acetonitrile to give the targeted 2,6-bis[5-(pyridin-2-yl)pyrrol-2-yl]pyridines 1b and 1c in good yields. The absorption behavior of the donor-acceptor tripyridyl-dipyrrole ligands was evaluated and compared to theoretical calculations. Highly fluorescent properties of these chromophores were found (ν(em)≈2 × 10(4) cm(-1) in MeOH and CH(2)Cl(2)), and both pyrrolic ligands exhibit a remarkable quantum yield in CH(2)Cl(2) (φ(f)=0.10). Structural studies in the solid state established the preferred cis conformation of the dipyrrolic ligands, which adopting a planar arrangement with an embedded molecule of water having a complexation energy exceeding 10 kcal mol(-1). The ability of the tripyridyl-dipyrrole to complex two copper(II) ions in a pentacoordinate square was investigated