181 research outputs found
Regarder le chemin parcouru pour s’ouvrir à l’avenir
L’économie rurale s’est développée au rythme de l’essor de l’agriculture. Elle trouvera dans les nouveaux enjeux mondiaux, alimentaires, énergétiques, environnementaux mais aussi éthiques de nouvelles pistes pour exprimer ses talents.Rural economy developed at the rate of the agriculture expansion. It will find in the new food, energy, environmental world stakes, but also in the ethics new ways to express its talents
Efficient photochemical activity and strong dichroism of single crystals of reaction centers from Rhodopseudomonas viridis
Crystallized reaction centers from Rhodopseudomonas viridis (i) are photochemically active with electron transfer from the special pair to the quinones, (ii) show dichroism giving valuable information on the orientation of the different chromophores and (iii) allow chemical treatment in the crystalline phase
Time-resolved spectroscopy of the excited electronic state of reaction centers of Rhodopseudomonas viridis
The spectral properties of the excited electronic state of the reaction centers of Rhodopseudomonas (Rps.) viridis are studied by dichroic transient absorption spectroscopy with sub-picosecond time resolution. The theoretical analysis of the experimental results allows the assignment of the transient absorption from two dimer bands of the special pair and show its excitonic coupling to other pigments
L’expertise en appui à la décision publique*
Agencies of risk assessment in support to the public decision were created in several European countries. After a few years of experiment, it is useful to give more attention to several points: the even concept of risk, the separation between expertise and management of the risk, the information of the public and the relationship between research and expertise
European agricultural research in the 21st century : Which innovations will contribute most to the quality of life, food and agriculture ?
International audienc
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