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Search Results: 1 - 10 of 1281 matches for " Florence Piron "
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An Induced Mutation in Tomato eIF4E Leads to Immunity to Two Potyviruses
Florence Piron,Maryse Nicola?,Silvia Mino?a,Elodie Piednoir,André Moretti,Aurélie Salgues,Dani Zamir,Carole Caranta,Abdelhafid Bendahmane
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0011313
Abstract: The characterization of natural recessive resistance genes and Arabidopsis virus-resistant mutants have implicated translation initiation factors of the eIF4E and eIF4G families as susceptibility factors required for virus infection and resistance function.
A new mutant genetic resource for tomato crop improvement by TILLING technology
Silvia Minoia, Angelo Petrozza, Olimpia D'Onofrio, Florence Piron, Giuseppina Mosca, Giovanni Sozio, Francesco Cellini, Abdelhafid Bendahmane, Filomena Carriero
BMC Research Notes , 2010, DOI: 10.1186/1756-0500-3-69
Abstract: To apply TILLING to tomato, a new mutant collection was generated in the genetic background of the processing tomato cultivar Red Setter by treating seeds with two different ethylemethane sulfonate doses (0.7% and 1%). An associated phenotype database, LycoTILL, was developed and a TILLING platform was also established. The interactive and evolving database is available online to the community for phenotypic alteration inquiries. To validate the Red Setter TILLING platform, induced point mutations were searched in 7 tomato genes with the mismatch-specific ENDO1 nuclease. In total 9.5 kb of tomato genome were screened and 66 nucleotide substitutions were identified. The overall mutation density was estimated and it resulted to be 1/322 kb and 1/574 kb for the 1% EMS and 0.7% EMS treatment respectively.The mutation density estimated in our collection and its comparison with other TILLING populations demonstrate that the Red Setter genetic resource is suitable for use in high-throughput mutation discovery. The Red Setter TILLING platform is open to the research community and is publicly available via web for requesting mutation screening services.Tomato (Solanum lycopersicum) is one of the most important vegetable plants in the world. Its fruits are end products both for the fresh market and food processing industry. Tomato presents a relatively small genome highly syntenic to others economically important Solanaceae species and was selected as a reference species for sequencing a Solanaceae genome. In addition to the availability of a number of genomic resources, including transcriptome [1-3] and metabolome [4], large collections of genetic resources are available to dissect the biochemical and the metabolic pathways in tomato [5]. Large EMS and fast neutron mutant collections, in the background of M82 tomato cultivar, have been generated and more then 3,000 phenotype alterations catalogued [6]. An EMS-induced mutation library of the miniature dwarf tomato cultivar Mi
Congé à Villey
Sylvain Piron
Atelier du Centre de Recherches Historiques , 2008, DOI: 10.4000/acrh.314
Abstract: La présentation de l’histoire de la philosophie du droit de Michel Villey se ramène à une opposition entre le droit naturel classique , dont l’exposition parfaite se trouverait chez Aristote et Thomas d’Aquin, et l’émergence des droits subjectifs , dont le premier introducteur serait le franciscain Guillaume d’Ockham. Cet article vise à déconstruire le mythe historiographique ainsi créé, en examinant sa genèse au fil des travaux et de la carrière de Michel Villey. Comme le titre l’indique, il incite à laisser ce mythe au rayon des vieilleries pour reprendre l’enquête à nouveaux frais. The history of philosophy of law, as presented by Michel Villey, is constructed around an opposition between the classical natural law , best expressed in Aristotle and Thomas Aquinas, and the emergence of subjective rights , whose first initiator is supposedly the franciscan theologian William of Ockham. This article aims at a deconstruction of such an historiographical myth, through an examination of its genesis, following Villey’s works and career. As the title suggests, the conclusion of this paper is that this myth should be discarded as useless, and new work pursued along a different problematization.
Les compléments prépositionnels dans les grammaires fran aises de la première moitié du XIXe siècle
Piron Sophie
SHS Web of Conferences , 2012, DOI: 10.1051/shsconf/20120100312
Abstract: Cette recherche porte sur une trentaine de grammaires publiées entre 1800 et 1840, essentiellement des grammaires scolaires, mais également quelques grammaires normatives, d'envergure plus importante que ce que propose le courant pédagogique. La fenêtre temporelle choisie commence avant la période de la première grammaire scolaire (Chervel 1977), de manière à en saisir les prémices, et se cl t juste avant la seconde grammaire scolaire. L'objectif de l'étude consiste à préciser comment la grammaire de la première moitié du XIXe siècle (telle qu'elle est représentée dans le corpus) traite les compléments prépositionnels, qu'il s'agisse des structures nom - syntagme prépositionnel (la maison de mes parents), adjectif - syntagme prépositionnel (content de soi) ou encore verbe - syntagme prépositionnel (nuire à quelqu'un, aller à Lyon, combattre avec courage). Les grammaires du corpus analysent ces différents compléments relativement uniformément et peuvent user d'appellations identiques pour désigner ces diverses constructions : régime ou complément indirect du verbe, du substantif et de l'adjectif. L'approche choisie par les grammairiens, bien que clairement orientée vers la sémantique, n'évalue à cette époque que la complétude du sens et ne distingue pas encore les différents types de compléments verbaux. à ce titre, les compléments locatifs (par exemple, à Paris dans aller à Paris) sont analysés comme des régimes ou compléments indirects.
Introduction à la Physique Quantique
Constantin Piron
Physics , 2002,
Abstract: En nous laissant guider par la notion de champ qui en fait domine toute la physique nous d\'efinissons la nature physique d'un syst\`eme, ses propri\'et\'es et ses \'etats possibles. Nous proposons alors un cadre tr\`es g\'en\'erale permettant la description de tels syst\`emes et la construction de mod\`eles consistants. Nous en donnons des exemples et pour illustrer les concepts de notre th\'eorie nous d\'ecrivons diff\'erents types d'\'evolutions. Pour terminer nous discutons en d\'etails un processus physique, les \'echos de spins.
Field Theory Revisited
Constantin Piron
Physics , 2002,
Abstract: Following P. A. M. Dirac's critique in ``Lectures on Quantum Field Theory'' of the usual formalism, I will discuss the role of the time parameter to solve R. Haag's no-go theorem on the non-equivalence of the conventional Schr\"odinger picture and the Heisenberg picture. This is possible by first defining in a correct way the concept of the vacuum state at a given time in relativity. I will also discuss some consequences such as the spectral condition.
Un nouveau regard sur le monde physique
Constantin Piron
Physics , 2002,
Abstract: Dans ce colloque je discute la notion d'espace selon Descartes et Leibniz et j'y oppose le point de vue de Samuel Clarke et Isaac Newton comme solution pour comprendre la r\'ealit\'e du monde physique
Observations of the gamma-Ray Emission Above 250 Gev from the Blazars Markarian 501 and Markarian 421 by the Cat Cherenkov Atmospheric Imaging Telescope
F. PIRON
Physics , 1999,
Abstract: The Very High Energy (VHE) gamma-ray emission of the closest BL Lacertae objects Markarian 501 and Markarian 421 has been observed by the CAT telescope in 1997 and 1998. In 1997 Mrk 501 exhibited a remarkable series of flares, with a VHE emission peaking above 250 GeV. The source showed correlated emissions in the X-ray and VHE gamma-ray bands, together with intensity-spectral hardness correlation in the latter energy range. During small flares in 1998, Mrk 421 became the second extragalactic source detected by CAT. Its spectral properties are compared to those of Mrk 501. Theoretical implications for jet astrophysics are briefly discussed.
Gamma-Ray Bursts at high and very high energies
F. Piron
Physics , 2015,
Abstract: Gamma-Ray Bursts (GRBs) are extra-galactic and extremely energetic transient emissions of gamma rays, which are thought to be associated with the death of massive stars or the merger of compact objects in binary systems. Their huge luminosities involve the presence a newborn stellar-mass black hole emitting a relativistic collimated outflow, which accelerates particles and produces non-thermal emissions from the radio domain to the highest energies. In this article, I review recent progresses in the understanding of GRB jet physics above 100 MeV, based on Fermi observations of bright GRBs. I discuss the physical implications of these observations and their impact on GRB modeling, and I present some prospects for GRB observation at very high energies in the near future.
Quantum Theory without Quantification
Constantin Piron
Mathematics , 2002,
Abstract: After having explained Samuel Clarke's conception of the new philosophy of physical reality, we will treat the electron field in this context as a field modifying the void. From this we will be able to derive the so-called quantum rules just from Noether's theorem on conserved currents. Thus quantum theory appears as a kind of nonlocal field theory, in fact a new theory.
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