DETERMINING THE WEAR OF ACTIVE ORGANS FOR PROCESSING SOIL DEPENDING ON THE WORKING DEPTH

This paper presents the experimental researches performed in laboratory stand, forfinding out the wear resistance of a working part of chisel type, by different materials, in a certain time, for enhancing the span of life of those knifes

Improvement of the photocatalytic degradation property of atomic layer deposited ZnO thin films: the interplay between film properties and functional performances:

In this work, we have evidenced the impact of stoichiometry on the photocatalytic properties of ZnO nanofilms grown by atomic layer deposition (ALD). We point out the importance of hydrogen incorporation and propose here a model explaining the presence of Zn-OH impurities in the form of a ZnOxHy amorphous matrix hosting ZnO crystallites. We evidence that this phase prevails in films grown at low temperatures and prevents the photoluminescence and photocatalytic activity of ZnO films. We also point out that high temperature ALD processes promote the preferential growth of ZnO films in the (002) orientation, leading to a significant increase of the film wettability and so their photocatalytic degradation performances

RESEARCH ON THE DEVELOPMENT OF A CONSERVATIVE TECHNOLOGY, USING OPTIMIZED ACTIVE BODIES FOR SOIL TILLAGE

Conservative agriculture has grown particularly in developed countries over the past20 years, due to intensive use of soils to obtain higher yields, by means of the processing works, maintenance, herbicides, etc. (even several times during a year), which in time led to the degradation and destruction of the structure and properties of soils. In this context, this paper presents the research conducted in order to develop a conservative technology based on optimized active bodies for soil tillage, to be mounted on a complex aggregate, in order to reduce wear, deformation and increase its lifetime

Pd Nanoparticles and Thin Films for Room Temperature Hydrogen Sensor

We report the application of palladium nanoparticles and thin films for hydrogen sensor. Electrochemically grown palladium particles with spherical shapes deposited on Si substrate and sputter deposited Pd thin films were used to detect hydrogen at room temperature. Grain size dependence of H2sensing behavior has been discussed for both types of Pd films. The electrochemically grown Pd nanoparticles were observed to show better hydrogen sensing response than the sputtered palladium thin films. The demonstration of size dependent room temperature H2sensing paves the ways to fabricate the room temperature metallic and metal–metal oxide semiconductor sensor by tuning the size of metal catalyst in mixed systems. H2sensing by the Pd nanostructures is attributed to the chemical and electronic sensitization mechanisms

The giant diploid faba genome unlocks variation in a global protein crop

Publisher Copyright: © 2023, The Author(s).Increasing the proportion of locally produced plant protein in currently meat-rich diets could substantially reduce greenhouse gas emissions and loss of biodiversity1. However, plant protein production is hampered by the lack of a cool-season legume equivalent to soybean in agronomic value2. Faba bean (Vicia faba L.) has a high yield potential and is well suited for cultivation in temperate regions, but genomic resources are scarce. Here, we report a high-quality chromosome-scale assembly of the faba bean genome and show that it has expanded to a massive 13 Gb in size through an imbalance between the rates of amplification and elimination of retrotransposons and satellite repeats. Genes and recombination events are evenly dispersed across chromosomes and the gene space is remarkably compact considering the genome size, although with substantial copy number variation driven by tandem duplication. Demonstrating practical application of the genome sequence, we develop a targeted genotyping assay and use high-resolution genome-wide association analysis to dissect the genetic basis of seed size and hilum colour. The resources presented constitute a genomics-based breeding platform for faba bean, enabling breeders and geneticists to accelerate the improvement of sustainable protein production across the Mediterranean, subtropical and northern temperate agroecological zones.Peer reviewe

Double decarbonylation of phthalimide revisited: A facile cathodic synthesis of isoindoline.

International audienc

Synthèse et caractérisation de zéolithe Ga-MCM-22

Colloque : du 22.09.2004 au 26.09.200

Intercalation compounds of Mg-Al layered double hydroxides with dichlophenac: Different methods of preparation and physico-chemical characterization

International audience[2-(2,6-Dichloro-phenylamino)-phenyl]-acetic acid (DPAPAc) was intercalated between layers of Mg-Al hydrotalcites. Several methods of incorporation were applied: direct ion exchange of the layered double hydroxide (LDH) carbonates with the organic ions, direct synthesis by co-precipitation of metal nitrates and sodium DPAPAc, and reconstruction of the Mg-Al oxide solid solution. The LDH reconstruction method led to the highest degree of intercalation and gave rise to an enlargement of the interlayer space of about 6.7 Å, which was observed in the powder X-ray diffraction (PXRD) patterns. The new hybrid phase obtained by this method was partially intercalated, as the LDH-carbonate phase was still mainly present in the material. The characterization of the prepared samples was also achieved with X-ray photoelectron spectroscopy (XPS), which indicated changes in the environment of the elements on insertion of the organic anions. Finally, the collected data indicated that the method of reconstruction was the most effective route to the hybrid materials. © 2004 Elsevier B.V. All rights reserved