Résultats de recherche

Panagiota Sarischouli est invitée par le Pr Jean-Luc Fournet, chaire Culture écrite de l'Antiquité tardive et papyrologie byzantine . Résumé Although the phenomenon of voces magicae is most often associated with Roman and Late Antique Egypt, the use of …

Résumé Cette étude présente la première   analyse complète d'un important manuscrit coranique découvert dans la geniza du sanctuaire de l’Imām Riḍā à Mashhad et qui comprend deux   cent   quarante-quatre   feuillets endommagés par le feu. Le colophon du …

Résumé L’étude de la reliure médiévale dans le monde musulman se heurte à des problèmes méthodologiques importants, mais aussi (et peut-être en raison de ces problèmes) à un certain scepticisme de la part de spécialistes de l’étude des manuscrits. La …

Résumé Si l'on considère le rôle du livre en tant qu'outil de communication, une analyse de ses différents matériaux et formes peut révéler des aspects de son utilisation et de sa fonction. Ses dimensions et sa forme peuvent, par exemple, influencer sa …

Résumé The line defects of three dimensional uniaxial nematics have a simple abelian algebra governing their interactions and so simply pass through one another. I will discuss, instead, biaxial nematics for which the fundamental group is non-abelian. As …

Table ronde animée par Myriam Cottias, CNRS, CIRESC, avec la participation de Catherine Porter, New York Times , Magali Bessone, université Paris 1 Panthéon-Sorbonne, et Jhon Picard Byron, université d'État …

Résumé Over the last three decades, the highly tunable properties of NHCs and other stable singlet carbenes have led to a variety of applications. We will discuss a novel facet of carbenes, i.e., their reductive properties, which allows carbenes to …

Résumé We demonstrate water activation by a photocatalytic phosphine-mediated radical process, generating a PR 3 -H 2 O radical cation intermediate, where both hydrogen atoms are used in the following chemical transformation through sequential cleavage of …

Résumé Originally discovered via vapor-phase pyrolysis of p -xylene, 1 [2.2]paracyclophanes (pCps) have garnered significant attention due to their unique three-dimensional architecture 2 and inherent planar chirality. 3 Despite their promising …

Résumé As part of the organic chemistry, radical chemistry is an important research area as the one electron reactivity is complementary to the ones of the two electrons and polar manifolds. In this regard, electrochemistry, which enjoy a renewal, offers …

Résumé Historically, group-1 alkali metal chemistry is dominated by +1 oxidation state. As the least electronegative elements in the Periodic Table, zero-valent alkali metals are prone to give out their only valence shell electron, i.e., acting as strong …

Résumé Our group aims to study the total synthesis of complex natural products. We particularly deploy oxidative coupling strategies via single electron transfer (SET) processes among others tactics. We also study electrochemistry to access three …

Résumé Since the pioneering report of the oxidative three-component Passerini reaction using a stoichiometric oxidant, [1] oxidative Isocyanide-based multicomponent reactions (IMCRs) have opened new avenues for accessing diverse chemical space from …

Résumé Photoinduced electron transfer is the key step in photoredox catalysis. We will briefly review the essential parameters affecting photoinduced electron transfer and how we can control them for the benefit of synthesis. Next, we discuss recent …

Résumé Computational quantum physics has recently seen a dramatic increase in its capabilities, precision, and predictive power. The advances have been driven by method and code development, benchmark, and collaboration. Together with exciting recent …

Résumé We discuss the role simplified controllable models may play in sharpening and solving questions in quantum cosmology. Some focus will be placed on lower dimensional models. Relevant literature includes 2406.15271, 2106.01665, …

Résumé Après une brève introduction au CGDD, à la sous-direction recherche et à leur implication sur le sujet de la géo-ingénierie, l'intervention aura pour but de présenter les positions françaises actuelles sur les deux principales familles de …