Search results for " Protection"
showing 10 items of 995 documents
Study of virus flows between wild and cultivated Poaceae
2017
BGPI : équipe 6; Study of virus flows between wild and cultivated Poaceae. 16. Rencontres de Virologie Végétale (RVV 2017)
Biodiversité fongique du raisin au vin : impact de l'activité anthropique
2016
The effects of different anthropogenic activities (vineyard, winery) on fungal populations from grape to wine were studied. To characterize these effects, it was necessary to access to the overall diversity of populations (pyrosequencing and spectroscopy FT-IR) but also to intra-specific diversity (FT-IR). Spectroscopy FT-IR has been validated for their ability to characterize the global population and to discriminate the strains for three species of non-Saccharomyces yeasts (NS). For the first time, it is shown that the grape berry is a limited source for NS yeasts while the winery seems to be a significant source; the air is an important vector for dissemination of these yeasts. In additi…
Role of the non-infective stage of the acanthocephalan parasite Pomphorhychus laevis on the behavioural manipulation of its amphipod intermediate host
2012
In trophically-transmitted parasites, exploitation strategies of the intermediate host have been selected, in a way increasing parasites transmission probabilities to their definitive host. Particularly, numerous parasites are able to alter their intermediate host behaviour, a phenomenon called ‘behavioural manipulation’. This manipulation only occurs when the parasite developmental stage (or larval stage) is infective for the definitive host. Before reaching this stage, the development of parasite larvae is not sufficiently advanced to allow establishment in the definitive host (this stage is thus called ‘non-infective’). Early transmission of a non-infective stage therefore implies parasi…
Assessing non-chemical weeding strategies through mechanistic modelling of blackgrass (Alopecurus myosuroides Huds.) dynamics
2010
; Because of environmental and health safety issues, it is necessary to develop strategies that do not rely on herbicides to manage weeds. Introducing temporary grassland into annual crop rotations and mechanical weeding are the two main features that are frequently used in integrated and organic cropping systems for this purpose. To evaluate the contribution of these two factors in interaction with other cropping system components and environmental conditions, the present study updated an existing biophysical model (i.e. AlomySys) that quantifies the effects of cropping system on weed dynamics. Based on previous experiments, new sub-models were built to describe the effects on plant survi…
Fusariose du cyclamen : connaître, détecter et prévenir
2015
SPE Pôle IPM; Fusarium oxysporum est un champignon tellurique ubiquiste présentant une grande diversité de souches pathogènes et non pathogènes. Les souches phytopathogènes sont groupées en formae speciales selon leur spécificité d’hôte. Ainsi, la forma specialis cyclaminis (Focy) est responsable de la fusariose vasculaire du cyclamen. C’est le pathogène le plus destructeur sur cyclamen. Le pathogène, et donc la maladie peuvent intervenir à tout moment du cycle de culture causant d’importantes les pertes. Malheureusement, la détection préventive de Focy n’est pas possible, la lutte chimique inefficace et la résistance variétale inexistante. La lutte biologique apparaît comme l’alternative à…
Potential of crop mixtures to reduce pesticide use in France. A data analysis
2022
Over the last 50 years, agricultural intensification has led to simplified agricultural systemshighly dependent on fertilisers and pesticides, causing biodiversity loss, changes in the balanceof nutrients, water and soil contamination. The total amount of pesticides applied each yearin France makes it the main consumer of plant protection products in Europe, and arable cropsare currently the most pesticide-consuming production systems. Reducing pesticide use inarable crops is thus a major challenge. There is now evidence that crop diversification in time,with more diversified rotations, and in space, through crop mixtures, can help restoreecosystem services and represent a potential key lev…
La biopiraterie et le commerce des produits pharmaceutiques face aux droits des populations locales sur leurs savoirs traditionnels
2006
Collection des travaux du Credimi
Present Uncertainty and Looking to the Past: The Ambiguous Literary Nationalism of Putnam’s Monthly
2023
Putnam’s Monthly (1853-1857) was one of the best literary and general interest magazines in antebellum America. Besides its high quality, what made the New York-based magazine stand out was its commitment to publishing American writers and focusing on American themes at a time when, with no reliable international copyright protection in place, many periodicals in the United States were in the habit of reprinting the works of foreign (primarily British) authors, sometimes without payment. However, despite its optimistic literary nationalism, Putnam’s Monthly expressed uncertainty about the quality of contemporary American literature and, indeed, about the capacity of American society to enco…
The place of art works in an exhibition on radiation protection
2015
The travelling exhibition “Vous avez dit radioprotection?” is coproduced by a science centre, (le Pavillon des Sciences), a scientific institution, the Radioprotection and Nuclear Safety Institute (IRSN), and the Pays de Montbéliard Agglomération regional authority. It gives an historic perspective on the discovery of radioactivity, and on radiation protection from two main devices: didactic films and artistic creations. Within the framework of a doctorate research in Communication Sciences at the University of Burgundy, France, this case study explores two points of view, the first being the exhibition as a mediating device, and the challenges related to it; the second is related to how th…
Ceramique/metal component elaborated by flash sintering for ballistic protection
2012
This dissertation describes the synthesis of new components for ballistic protection with the assistance of flash sintering. Indeed, the objective is to associate two compounds showing very different sintering temperatures – such as alumina and aluminum, two reference materials for ballistic protection applications.The first synthesis method tested was the elaboration of a bi-material via the sintering of aluminump owder on alumina bulks. This study permitted to observe the formation of the alumina/aluminum bonding by scanning and transmission electron microscopy and to optimize the assembly parameters in order to obtain a bimaterials howing a strong interfacial cohesion. Adapted characteri…