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BackgroundThe effective detection and comparison of orthologues is crucial for answering many questions in comparative genomics, phylogenetics and evolutionary biology. One of the most common methods for discovering orthologues is widely known as ‘Reciprocal Blast’. While this method is simple when comparing only two genomes, performing a large-scale comparison of Multiple Genes across Multiple Taxa becomes a labor-intensive and inefficient task. The low efficiency of this complicated process limits the scope and breadth of questions that would otherwise benefit from this powerful method.FindingsHere we present RecBlast, an intuitive and easy-to-use pipeline that enables fast and easy discovery of orthologues along and across the evolutionary tree. RecBlast is capable of running heavy, large-scale and complex Reciprocal Blast comparisons across multiple genes and multiple taxa, in a completely automatic way. RecBlast is available as a cloud-based web server, which includes an easy-to-use user interface, implemented using cloud computing and an elastic and scalable server architecture. RecBlast is also available as a powerful standalone software supporting multi-processing for large datasets, and a cloud image which can be easily deployed on Amazon Web Services cloud. We also include sample results spanning 448 human genes, which illustrate the potential of RecBlast in detecting orthologues and in highlighting patterns and trends across multiple taxa.ConclusionsRecBlast provides a fast, inexpensive and valuable insight into trends and phenomena across distance phyla, and provides data, visualizations and directions for downstream analysis. RecBlast's fully automatic pipeline provides a new and intuitive discovery platform for researchers from any domain in biology who are interested in evolution, comparative genomics and phylogenetics, regardless of their computational skills.

The structure of an automated complex developed by the authors for investigating strength properties of structural elements is examined. A complex set of problems on the formation, high-quality processing, and analysis of results and software for a wide spectrum of simulated effects is solved with the help of a two-level automated control system which provides for program control of acceleration, declaration, heating, and cooling of the tested elements. A set of new technical means is presented which facilitate considerable extension of the functional possibilities of the stand and reduction in the time for the tests.

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International audience; On prépare des échantillons très denses de TiN par pressage à chaud de poudres pures. On suit la cinétique de densification par dilatométrie sous pression. On étudie la microstructure, la densité, la microdureté et le module de rupture sous flexion des matériaux obtenus.

International audience