Comparing radiolytic production of H2O2 and development of Zebrafish embryos after ultra high dose rate exposure with electron and transmission proton beams.

The physico-chemical and biological response to conventional and UHDR electron and proton beams was investigated, along with conventional photons. The temporal structure and nature of the beam affected both, with electron beam at ≥1400 Gy/s and proton beam at 0.1 and 1260 Gy/s found to be isoefficient at sparing zebrafish embryos

A study of karst hydrosystem recharge at the parcel scale, using modeling and correlation analysis - Low noise underground laboratory of Rustrel site

La caractérisation des flux d’eaux qui rechargent réellement les hydrosystèmes souterrains reste un frein à la compréhension du fonctionnement hydrogéologique des milieux souterrains. Lors d’événements pluvieux, quelle part de l’eau est évapo-transpirée ? Quelle part est temporairement stockée dans le sol ? Ces incertitudes sont particulièrement fortes dans le cas de la recharge des milieux hétérogènes tel que le karst. En général, les calculs de recharge des hydrosystèmes karstiques se basent sur une représentation simplifiée de l’évapotranspiration qui considère seulement le climat et pas le fonctionnement de la végétation. Dans cette étude, un modèle de végétation permettant de simuler les transferts d’eaux entre le sol et l’atmosphère en contexte forestier (le modèle CASTANEA), a été appliqué à une parcelle de Chêne vert. L’infiltration efficace (un indicateur de la recharge) estimé avec CASTANEA a été comparée à celle estimée par des approches classiques ainsi qu’à des séries long terme de flux d’eaux souterraines (9 années). Les résultats de cette analyse révèlent que l’infiltration efficace modélisée à partir d’un modèle de végétation comme CASTANEA est plus satisfaisante que les approches classiques ne tenant pas compte du fonctionnement de la végétation. Ce travail ouvre des perspectives intéressantes pour mieux tenir compte du fonctionnement de la végétation et de l’usage du sol sur la recharge des hydrosystèmes karstiques.Assessing the recharge of underground hydrosystems remains an obstacle to understand their hydrologeological functioning. During a rain event, which part of the rain is evapotranspired ? And how much is temporarily stored within the soil ? These questions are particularly relevant in heterogeneous media such as karst hydrosystems. Currently, the models used to compute recharge of karst hydrosystems, rely on simplistic formulations of evapotranspiration that do not account for vegetation functioning. In this study, we used the vegetation process based model CASTANEA, which is designed to compute water transfer between soil, plant and atmosphere. We computed effective infiltration (an index of recharge) with CASTANEA and with other classical approach (based on precipitation minus ETP), and for a welldocumented holm oak site in Provence. Our results provide evidences that effective infiltration computed with CASTANEA yield more satisfactory correlation with measured outflow than simulations based on the classical approach. Our results provide a promising way to improve the simulation of karst hydrosystem recharge

Is there a role of coral bone substitutes in bone repair?

Xenogeneic bone graft materials are an alternative to autologous bone grafting. Among such implants, coralline-derived bone grafts substitutes have a long track record as safe, biocompatible and osteoconductive graft materials. In this review, we present the available literature surrounding their use with special focus on the commercially available graft materials. Corals thanks to their chemical and structural characteristics similar to those of the human cancellous bone have shown great potential but clinical data presented to date is ambiguous with both positive and negative outcomes reported. Correct formulation and design of the graft to ensure adequate osteo-activity and resorption appears intrinsic to a successful outcome

Des moulins hydrauliques en périphérie d’Augustonemetum/Clermont-Ferrand, Puy-de-Dôme (iie-iiie s. ap. J.-C.)

Two recent preventive archaeological excavations carried out in Clermont-Ferrand (Puy-de-Dôme) allowed to study the evolution of districts located in the outskirts of the antique city between the end of the first or the beginning of the second century and the Late Roman Empire. Buildings using for craft or commercial activities are standing close to residential settlements. They take place in marshy areas, on the fringes of the primitive center of the augustean period, that have been invested after important draining works. The control of the rivers crossing the two studied sites was followed by their exploitation. Therefore, water mills have been identified on each site, firstly thanks to the many wooden objects and to the millstones discovered during excavations, secondly thanks to the built remains’ analysis. So, the sites of Fontgiève and of the “Scène nationale” are two new examples of hydraulic installations in an urban context, which allowed to raise the question of the use of the water driving force in craft activities – the mill may not be the only one –, but also the question of the flour supply in antique cities

Indésirables mais utiles : la gestion des eaux dans la périphérie urbaine d'Augustonemetum / Clermont-Ferrand (fin du Ier s. - IVe s. ap. J.-C.)

International audienc

Indésirables mais utiles : la gestion des eaux en périphérie d’Augustonemetum/Clermont-Ferrand.Les sites de la rue Fontgiève et de l’ancienne gare routière (fin du Ier s.-IVe s. apr. J.-C.)

International audienc

Indésirables mais utiles : la gestion des eaux dans la périphérie urbaine d'Augustonemetum / Clermont-Ferrand (fin du Ier s. - IVe s. ap. J.-C.)

International audienc

Indésirables mais utiles : la gestion des eaux dans la périphérie urbaine d'Augustonemetum / Clermont-Ferrand (fin du Ier s. - IVe s. ap. J.-C.)

International audienc

Indésirables mais utiles : la gestion des eaux en périphérie d’Augustonemetum/Clermont-Ferrand.Les sites de la rue Fontgiève et de l’ancienne gare routière (fin du Ier s.-IVe s. apr. J.-C.)

International audienc