Electrochemical investigation of high-performance silane sol-gel films containing clay nanoparticles

peer reviewe

La céramique antique de deux établissements ruraux en territoire ségusiave : Grand’Plantes à Fleurieux-sur-l’Arbresle et Les Fourches à Lentilly (Rhône)

Deux fermes antiques en territoire ségusiave, dont une particulièrement bien caractérisée, ont livré des lots de mobilier qui permettent de montrer l’évolution du faciès céramique depuis la fin du Ier s. av. J.-C. jusqu’au IIIe s. de notre ère. À proximité de la colonie romaine de Lugdunum, au sud, et de Forum Segusiavorum, la capitale de cité ségusiave, à l’est, les sites sont également dans l’aire d’influence de l’axe Rhône-Saône. L’étude des céramiques communes et une attention particulière aux pâtes ont révélé une grande variété de faciès morphologiques avec des influences de la vallée de la Loire, de Lyon et Vienne dans la vallée du Rhône mais aussi de la plaine de la Saône.Two Antique farms in the Segusiavi region, including one that is particularly well characterized, yielded artifact assemblages that show the evolution of the ceramic facies from the end of the 1st c. BC to the 3rd c. AD. Located near the Roman colony of Lugdunum to the south, and the Forum Segusiavorum, the capital of the Segusiavi city, to the east, the sites are also in the zone of influence of the Rhône-Saône axis. The study of the common ceramics, with specific attention paid to the clays, revealed a wide variety of morphological facies with influences from the Loire Valley, Lyon and Vienne in the Rhône Valley, as well as from the Saône plain.Die Keramikserien aus zwei antiken ländlichen Siedlungen auf dem Gebiet der Segusiaver, eine der beiden Siedlungen ist sehr charakteristisch, erlauben es die Entwicklung der Keramik vom Ende des 1. Jh. v. Chr. bis zum 3. Jh. n. Chr. zu nachzuverfolgen. Die Siedlungen liegen südlich der römischen Kolonie Lugdunum und östlich von Forum Segusiavorum, dem Hauptort der Segusiaver, und befinden sich zudem im Einflussbereich der Achse Rhône-Saône. Die Untersuchung der Gebrauchskeramik, bei der den verwendeten Tonen besondere Aufmerksamkeit gewidmet wurde, hat eine große morphologische Vielfalt mit Einflüssen des Loiretals, Lyon und Vienne im Rhonetal, doch auch der Saône-Ebene aufgezeigt

Homology modeling and in vivo functional characterization of the zinc permeation pathway in a heavy metal P-type ATPase

The P1B ATPase Heavy Metal ATPase 4 (HMA4) is responsible for zinc and cadmium translocation from roots to shoots in the plant Arabidopsis thaliana. It couples ATP hydrolysis to cytosolic domain movements enabling metal transport across the membrane. Thanks to high conservation level within the P-type ATPase family, the role of the HMA4 cytoplasmic catalytic domains can be inferred from well characterized pumps. In contrast, the function of its terminal cytosolic extensions as well as the metal permeation mechanism through the membrane remains elusive. Here, homology modeling of the HMA4 transmembrane region was conducted based on the crystal structure of a ZntA bacterial homolog. The analysis highlighted amino acids forming a metal permeation pathway, whose importance was subsequently investigated functionally through mutagenesis and complementation experiments in plants. Although the zinc pathway displayed overall conservation among the two proteins, significant differences were observed, especially in the entrance area with altered electronegativity and the presence of a salt bridge/H-bond network. The analysis also newly identified amino acids whose mutation results in total or partial loss of the protein function. In addition, comparison of zinc and cadmium accumulation in shoots of A. thaliana complemented lines revealed a number of HMA4 mutants exhibiting different abilities in zinc and cadmium translocation. These observations could be instrumental to design low cadmium accumulating crops, hence decreasing human cadmium exposure

L'opposabilité des conditions générales de contrats conclus sur internet et ses zones d'ombre

Master [120] en droit, Université catholique de Louvain, 201

Enrochements et regard sur l’aqueduc de la Brévenne à Dardilly, chemin du Combert (Métropole de Lyon)

International audienceTwo archaeological operations, 50 m apart, conducted at Dardilly (France), provided new data on the Brévenne aqueduct with the discovery of two imposing platforms consisting of large, thick slabs, one of them combined with a manhole. These structures were probably intended to support the ground around the aqueduct and to protect it from runoff from a talweg perpendicular to the axis of the structure.Les deux diagnostics menés chemin du Combert à Dardilly (Métropole de Lyon), ont permis de restituer un long segment du tracé de l’aqueduc antique de la Brévenne et d’étudier sa conduite souterraine. Par ailleurs, ils ont mené à la découverte de deux imposants aménagements de grandes et épaisses dalles, l’une d’elles étant associée à un regard. Ces aménagements, que nous proposons de qualifier d’enrochements, étaient certainement destinés au maintien des terrains autour de l’aqueduc et à la protection de ce dernier contre les ruissellements issus d’un talweg perpendiculaire à l’axe de l’ouvrage

Chloroplastic and mitochondrial metal homeostasis.

peer reviewedTransition metal deficiency has a strong impact on the growth and survival of an organism. Indeed, transition metals, such as iron, copper, manganese and zinc, constitute essential cofactors for many key cellular functions. Both photosynthesis and respiration rely on metal cofactor-mediated electron transport chains. Chloroplasts and mitochondria are, therefore, organelles with high metal ion demand and represent essential components of the metal homeostasis network in photosynthetic cells. In this review, we describe the metal requirements of chloroplasts and mitochondria, the acclimation of their functions to metal deficiency and recent advances in our understanding of their contributions to cellular metal homeostasis, the control of the cellular redox status and the synthesis of metal cofactors

Application d'une stratégie diagnostique chez des patients suspects de thrombose veineuse profonde aux urgences

info:eu-repo/semantics/publishe

Study of the Inhibition Mechanism of Chrome Free Inhibitors on the Galvanized Steel by Classical and Local Electrochemical Techniques

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