579 research outputs found
La démobilisation ou la fin des machines de guerre au Mozambique
Fernando a trente-deux ans. Il est grand, Ă©lancĂ©, porte des guenilles, des bottes ouvertes et percĂ©es ; Fernando est fort, facilement violent, il discute souvent, parle haut et accapare lâattention de ses camarades soldats. Il est aussi mon premier conseiller, mon assistant et aide. Il a accĂšs avec moi au magasin tant convoitĂ©, que nous visitons avec les cuisiniers chaque matin : 150 kg de farine de maĂŻs, 100 kg de riz, haricots, sucre et sel Ă distribuer quotidiennement. Lorsque du proche aĂ©..
Annealing tests of in-pile irradiated oxide coated UâMo/AlâSi dispersed nuclear fuel
Authors do acknowledge the MERARG team for their experimental work (CEA) and F. Charollais, J. Noirot and finally B. Kapusta for their advices and comments. This study was supported by a combined Grant (FRM0911) of the Bundesministerium fĂŒr Bildung und Forschung (BMBF) and the Bayerisches Staatsministerium fĂŒr Wissenschaft, Forschung und Kunst (StMWFK).UâMo/Al based nuclear fuels have been worldwide considered as a promising high density fuel for the conversion of high flux research reactors from highly enriched uranium to lower enrichment. In this paper, we present the annealing test up to 1800°C of in-pile irradiated UâMo/AlâSi fuel plate samples. More than 70% of the fission gases (FGs) are released during two major FG release peaks around 500°C and 670°C. Additional characterisations of the samples by XRD, EPMA and SEM suggest that up to 500°C FGs are released from IDL/matrix interfaces. The second peak at 670°C representing the main release of FGs originates from the interaction between UâMo and matrix in the vicinity of the cladding
Chemical cross-linking methods for cell encapsulation in hydrogels
International audienceCell-encapsulating hydrogels are of tremendous interest in regenerative medicine. Tissue engineering relies on biomaterials able to act as artificial extracellular matrices to guide cells towards the development of new tissues. Therefore, considerable efforts have been made to design biomaterials which mimic cellsâ native environment, thus encouraging natural behavior. The choice of biomaterial in which cells are embedded is crucial for their survival, proliferation and differentiation. Being more stable, chemical hydrogels are preferred over physical hydrogels as cell-laden substrates. When designing chemical hydrogels, scientists must choose not only the nature of the network (synthetic and/or bio-polymers) but also the type of cross-link bridging hydrogel constituents. For that purpose, numerous chemistries have been used (i) to introduce reactive functions on the hydrogel precursors and (ii) to form covalent bonds in the presence of living cells. The review will discuss the advantages and limitations of each strategy
Total Synthesis of Amphidinolideâ F
Orchestrated yet nonconsonant: The challenge posed by the âumpoledâ 1,4-dioxygenation pattern characteristic for the polyketide frame of amphidinolideâ
F was mastered by a late-stage ring-closing alkyne metathesis followed by a directed transannular hydration under the aegis of a carbophilic Ï-acid catalyst. This concordant strategy enabled a concise total synthesis of this enticing marine natural product
Draft Genome Sequence of the Principal Etiological Agent of Farmer?s Lung Disease, Saccharopolyspora rectivirgula
Saccharopolyspora rectivirgula is the main cause of farmer's lung disease. The development of recombinant antigens to standardize the serodiagnosis of the disease requires knowledge of the S. rectivirgula genome. We sequenced the genome of an environmental strain, S. rectivirgula DSM 43113. A total of 3,221 proteins were found to be encoded in a short 3.9-Mb genome
Analyse phosphoprotéomique des voies de réponse au fludioxonil des champignons filamenteux Alternaria brassicicola et Botrytis cinerea
The fludioxonil induced phosphoproteomes of the phytopathogenic fungi Alternaria brassicicola and Botrytis cinerea
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