Concept

Cycle du carbone

Publications associées (396)

Multi-wavelength Raman lidar, sun photometric and aircraft measurements in combination with inversion models for the estimation of the aerosol optical and physico-chemical properties over Athens, Greece

A novel procedure has been developed to retrieve, simultaneously, the optical, microphysical and chemical properties of tropospheric aerosols with a multi-wavelength Raman lidar system in the troposphere over an urban site (Athens, Greece: 37.9° N, 23.6° E ...

2012

Analysis of carbon and nitrogen dynamics in riparian soils: Model validation and sensitivity to environmental controls

David Andrew Barry, Alessandro Brovelli, Jordi Batlle-Aguilar, Pascal Niklaus

The Riparian Soil Model (RSM) of Brovelli et al. (Sci. Total Environ., this issue) was applied to study nutrient turnover in a revitalized section of the Thur River, North-East Switzerland. The model was first calibrated on field experimental data. The mod ...

Elsevier2012

Cholesterol Catabolism by Mycobacterium tuberculosis Requires Transcriptional and Metabolic Adaptations

John McKinney

To understand the adaptation of Mycobacterium tuberculosis to the intracellular environment, we used comprehensive metabolite profiling to identify the biochemical pathways utilized during growth on cholesterol, a critical carbon source during chronic infe ...

2012

High nitrogen deposition alters the decomposition of bog plant litter and reduces carbon accumulation

Alexandre Buttler, Luca Bragazza, Jonathan Habermacher

Bogs are globally important sinks of atmospheric carbon (C) due to the accumulation of partially decomposed litter that forms peat. Because bogs receive their nutrients from the atmosphere, the world-wide increase of nitrogen (N) deposition is expected to ...

2012

Effect of primary organic sea spray emissions on cloud condensation nuclei concentrations

Athanasios Nenes

This work estimates the primary marine organic aerosol global emission source and its impact on cloud condensation nuclei (CCN) concentrations by implementing an organic sea spray source function into a series of global aerosol simulations. The source func ...

2012

Chitin colonization, chitin degradation and chitin-induced natural competence of Vibrio cholerae are subject to catabolite repression

Melanie Blokesch

Although Vibrio cholerae is a human pathogen its primary habitat are aquatic environments. In this environment, V. cholerae takes advantage of the abundance of zooplankton, whose chitinous exoskeletons provide a nutritious surface. Chitin also induces the ...

Wiley-Blackwell2012

Glasshouse vs field experiments: do they yield ecologically similar results for assessing N impacts on peat mosses?

Alexandre Buttler, Edward Mitchell, Luca Bragazza

Peat bogs have accumulated more atmospheric carbon (C) than any other terrestrial ecosystem today. Most of this C is associated with peat moss (Sphagnum) litter. Atmospheric nitrogen (N) deposition can decrease Sphagnum production, compromising the C seque ...

2012

In vivo detection of brain Krebs cycle intermediate by hyperpolarized magnetic resonance

Rolf Gruetter, Mor-Miri Mishkovsky, Arnaud Comment

The Krebs (or tricarboxylic acid (TCA)) cycle has a central role in the regulation of brain energy regulation and metabolism, yet brain TCA cycle intermediates have never been directly detected in vivo. This study reports the first direct in vivo observati ...

Nature Publishing Group2012

Dynamic Initiation Fracture Toughness Determination and Full-field Strain Measurements of Rock Material

Wei Wu, Qianbing Zhang

The purpose of this paper is to present a detailed experimental procedure for the quantitative determination of initiation fracture toughness and full-field strain measurement of rock material under dynamic loads. Notched semi-circular bending tests were c ...

2012

Effects of short-term ecosystem experimental warming on water-extractable organic matter in an ombrotrophic Sphagnum peatland (Le Forbonnet, France)

Alexandre Buttler, Vincent Eric Jules Jassey

In a future warmer world, peatlands may change from a carbon sink function to a carbon source function. This study tracks changes in water-extractable organic matter (WEOM) after 1 year of in situ experimental warming using open top chambers (OTCs). WEOM w ...

2011

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