Search results for " rap"

Différences de capacités d’induction de la germination de deux pathovars d’orobanche rameuse sur une gamme d’hôtes des familles des brassicacées et f…

2016

Branched broomrape (Phelipanche ramosa (L.) Pomel) is a holoparasite weed causing significant yield losses on several crops, especially in France on winter oilseed rape fields. The ability to induce germination of seeds of branched broomrape, variable between host species, represent an important information to identify the status of weed species present in the crop (host or non-host). In this study, conducted in in vitro conditions, we focused on two botanical families and two dominant pathovars of branched broomrape in France. We show that the host species is the only important explanatory factor of seed germination rate, the latter being not affected by the pathovar. Among the species stu…

Ex ante evaluation of gene flow in oilseed rape with cropping sytem models

2009

International audience

Spatio-temporal dynamics of weed seed eating carabid species in agricultural mosaics: variation of annual habitat quality of oil seed rape and role o…

2017

National audience; Carabid beetles are considered as important contributors to the regulation of weeds and recent studies have shown that weed seed predation by carabids may partly substitute for herbicide use in agriculture. Enhancing this ecosystem service requires to understand the spatio-temporal distribution of these species during the cropping season. Infra-annual variation in the spatial distribution of ground beetles within agricultural mosaics is less documented but of prime importance given that agricultural landscapes are highly dynamics. Indeed, crop phenology, agricultural operations but also habitat requirements during life cycle can lead to a redistribution of individuals bet…

Approches de la nuisibilité du bleuet en colza d'hiver

2016

Infestation of oilseed rape fields by cornflower is more and more frequent, which could become harmful. In contrast, cornflower produces nectar that is a resource for pollinators and probably crop pest predators and parasitoides. In order to get benefit of this resource, it is necessary to determine a balanced equilibrium between the services and the weediness of cornflower in spite of destroying it. We describe here bispecific competition trials against oilseed rape in small experimental plots. Experimental conditions led to too high or too small plant densities to estimate a threshold of competition. Results provide relevant information on self-concurrence among cornflower plants and on i…

Polivalenze funzionali e figurative. Osservazioni su Zeus Meilichios

2006

International audience; Le culte de Zeus Meilichios fournit un champ d’observation particulièrement approprié pour discuter de la pluralité problématique des représentations des dieux dans le polithéisme grec, qu’il s’agisse de figurations anthropomorphiques ou zoomorphiques ou bien du soi-disant « aniconisme ». Dieu bienveillant, présent dans toutes les aires du monde grec et sur une très longue période, Zeus Meilichios opère dans un espace symbolique et social de médiation. Il exerce également un rôle essentiel de charnière entre les dimensions du public et du privé, afin de reconstituer un tissu politique et social continuellement exposé à des déchirures (le cas de la stasis d’Argo et de…

Francine Rapiné : une jeune étudiante, porteuse de valise à la faculté de Besançon

2015

National audience

Expansion dynamics of the plasma plume formed by the impact of a nanosecond Nd : YAG laser beam on metallic surface under atmospheric conditions : ex…

2010

Laser ablation in the air at atmospheric pressure is nowadays frequently applied in industry, chemical analysis, surgery… For a further development of laser ablation based technologies, it is necessary to better understand the laser – matter interaction. During the impact of a laser pulse on the surface of the treated material, a plasma plume forms above the target surface. This plume contains particles (electrons, ions, atoms) of ablated matter, as well as of ambient gas, if present. During the laser pulse, this plume absorbs a large amount of the laser beam energy, thus reducing the quantity of the laser radiation arriving to the target surface. Dimensions, as well as parameters of this p…

Le rappresentazioni sociali dell'abuso: i protagonisti e i contesti

2011

Lo spazio della rappresentanza. Francia 1788-1789

2008

La rappresentanza è il riflesso della disorganicità sociale e governa lo spazio del consenso conquistato. La mappa di questo luogo corrisponde allora alla descrizione e alla misurazione del consenso che vi si forma. La trasformazione dello spazio gotico dell'Ancien régime nello spazio a griglie dello stato rappresentativo avviene attraverso tre dibattiti assembleari tra il luglio e il settembre 1789. Sono questi dibattiti al cui centro si colloca l'abate Sieyes,a definire la macchina della rappresentanza e lo spazio del consenso politico "borghese": la sua angustia come le sue regole. Il libro è una ricostruzione storico-filosofica di questi dibattiti:il concetto di nazione, il principio ma…

Early evolution of metazoan serine/threonine and tyrosine kinases: identification of selected kinases in marine sponges.

1997

The phylum Porifera (sponges) was the first to diverge from the common ancestor of the Metazoa. In this study, six cDNAs coding for protein-serine/threonine kinases (PS/TKs) are presented; they have been isolated from libraries obtained from the demosponges Geodia cydonium and Suberites domuncula and from the calcareous sponge Sycon raphanus. Sequence alignments of the catalytic domains revealed that two major families of PS/TK, the "conventional" (Ca(2+)-dependent) protein kinase C (PKC), the cPKC subfamily, as well as the "novel" (Ca(2+)-independent) PKC (nPKC), form two separate clusters. In each cluster, the sequence from S. raphanus diverges first. To approach the question about the or…