Viral to metazoan marine plankton nucleotide sequences from the Tara Oceans expedition

A unique collection of oceanic samples was gathered by the Tara Oceans expeditions (2009-2013), targeting plankton organisms ranging from viruses to metazoans, and providing rich environmental context measurements. Thanks to recent advances in the field of genomics, extensive sequencing has been performed for a deep genomic analysis of this huge collection of samples. A strategy based on different approaches, such as metabarcoding, metagenomics, single-cell genomics and metatranscriptomics, has been chosen for analysis of size-fractionated plankton communities. Here, we provide detailed procedures applied for genomic data generation, from nucleic acids extraction to sequence production, and we describe registries of genomics datasets available at the European Nucleotide Archive (ENA, www.ebi.ac.uk/ena). The association of these metadata to the experimental procedures applied for their generation will help the scientific community to access these data and facilitate their analysis. This paper complements other efforts to provide a full description of experiments and open science resources generated from the Tara Oceans project, further extending their value for the study of the world's planktonic ecosystems

Wetting of Decagonal Al13Co4 and Cubic AlCo Thin Films by Liquid Pb

International audienceWetting of ìm-sized Pb droplets on thin polycrystalline films of decagonal Al13Co4 and cubic crystalline AlCo phases is reported. The sample preparation is crucial to have Pb droplets lying on a clean surface. Decagonal and cubic films were prepared under high vacuum conditions, by sequential deposition and annealing of specific stackings of Al and Co layers of nanometric thicknesses. A 300nm-thick Pb slab was then deposited on the top of the films. Dewetting experiments were performed in situ in a scanning Auger microprobe where the surface chemistry can be monitored: the Pb slab dewetts into droplets. The wetting of Pb on both substrates was found to be similar with contact angles around 45°

Contact angles of liquid metals on quasicrystals

International audienc

Volume-Diffusion of 59Fe in Al62Cu25.5Fe 12.5 Icosahedral Quasicrystals

The volume diffusion of 59Fe in Al62Cu25.5Fe12.5 Icosahedral quasicrystals is analyzed using classical diffusion techniques. Over the temperature range from 550°C to 800°C, the volume diffusion coefficients show a classical diffusion behavior and the temperature dependence can be expressed by the following relation : [MATH]. In the absence of data on a crystalline phase with similar composition, diffusion coefficients are compared to those obtained for Fe in aluminium and in aluminides (FeAl and Al13Fe4) : no strong peculiarity linked to the quasicrystalline structure appears

Volume-diffusion of 59Fe in Al62Cu25.5Fe12.5 icosahedral quasicrystals

Communication to : 38th Conference on metallurgy, INSTN 95 : 'des Quasicristaux aux Superalliages', Saclay (France), june 20-22, 1995SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1996 n.9 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Terrorism Risk Coverage in the Post-9/11 Era: A Comparison of New Public–Private Partnerships in France, Germany and the U.S.*

The paper discusses the development and operation of terrorism insurance programmes established in France, Germany and the U.S as reaction to 9/11. These three programmes are all based upon a public–private partnership with government backup. However, there are some fundamental differences regarding issues such as exclusions, price differentiation, risk mutualization, current level of terrorism insurance demand and the government exit strategy. In particular, significant differences of prices and degree of market penetration in the three countries have been observed and we discuss some factors that could contribute to this. Recent changes in the nature of international terrorism worldwide indicate that these issues will remain in our future. Hence, we think that government and industry would at the very least benefit from better understanding of how others operate abroad. The Geneva Papers (2005) 30, 144–170. doi:10.1057/palgrave.gpp.2510009