Search results for "France"
showing 10 items of 2879 documents
The right to water: an ambivalent implementation in France and England
2017
National audience; L'article qui analyse la mise en oeuvre du droit
Dissolved silica in the Garonne River waters : changes in the weathering dynamics
2000
The major ion chemistry of the Garonne River is indicative of seasonal variations in the weathering dynamics of the drainage basin. Using the geochemical model MEGA for calculation of the contribution of atmospheric CO2 to the total bicarbonate fluxes exported by the Garonne River allows estimations of the concentrations of the major dissolved elements that originate from silicate- and carbonate-rock weathering. The molecular ratio SiO2/Al2O3 was calculated for the 1989–1992 period to identify the main type of weathering in the Garonne River, and montmorillonite was shown to be the major mineral occurring in the weathering products. The seasonal variations of the SiO2/Al2O3 ratio also showe…
Alachlor and Bentazone Losses from Subsurface Drainage of Two Soils
2004
International audience; Atrazine (6-chloro-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine) is frequently detected at high concentrations in ground water. Bentazone [3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] plus alachlor (2-chloro-2',6'-diethyl-N-methoxymethylacetanilide) is a potential herbicide combination used as a substitute for atrazine. Thus, the objective of this study was to assess the environmental risk of this blend. Drainage water contamination by bentazone and alachlor was assessed in silty clay (Vertic Eutrochrept) and silt loam (Aquic Hapludalf) soils under the same management and climatic conditions. Drainage volumes and concentrations of alachlor and bent…
Laboratory leaching studies of oryzalin and diuron through three undisturbed vineyard soil columns
2004
Article de revue (Article scientifique dans une revue à comité de lecture); International audience; The leaching of diuron and oryzalin through undisturbed soil columns was studied in the laboratory using three vineyard soils from Vosne-Romanée (Burgundy): a rendosol, a calcosol and a vegetated calcosol. After 845 mm of simulated rainfall in 15 days, soil leachates contained higher amounts of diuron (3.2%, 11.8% and 18.8% of applied diuron, respectively) than oryzalin (0.2%, 4.9%, 3.7%, respectively). A greater proportion of soil extractable residues was obtained for diuron (42.5%, 26.8% and 32.2%, respectively) than for oryzalin (14.7%, 12% and 15.5%, respectively). The greater mobility of…
Leaching of oryzalin and diuron through undisturbed vineyard soil columns under outdoor conditions
2006
12 pages; International audience; Field studies monitoring herbicide pollution in the vineyards of Burgundy (France) have revealed that drinking water reservoirs are contaminated with several pre-emergence herbicides. An assessment of the leaching of two such herbicides, diuron and oryzalin, was therefore performed using lysimeters, under outdoor conditions, from May 2001 to May 2002. Four vineyard soils from Vosne-Roman?(Burgundy) were chosen along a topolithosequence: a rendosol and three calcosols. After 673 mm of rainfall, greater amounts of diuron than oryzalin were measured in percolates: respectively 0.10-0.84% and 0.02-0.43% of applied herbicide, depending on soils. Measurements for…
Leaching of glyphosate and AMPA under two soil management practices in Burgundy vineyards (Vosne-Romanée, 21-France)
2005
Some drinking water reservoirs under the vineyards of Burgundy are contaminated with herbicides. Thus the effectiveness of alternative soil management practices, such as grass cover, for reducing the leaching of glyphosate and its metabolite, AMPA, through soils was studied. The leaching of both molecules was studied in structured soil columns under outdoor conditions for 1 year. The soil was managed under two vineyard soil practices: a chemically treated bare calcosol, and a vegetated calcosol. After 680 mm of rainfall, the vegetated calcosol leachates contained lower amounts of glyphosate and AMPA (0.02% and 0.03%, respectively) than the bare calcosol leachates (0.06% and 0.15%, respectiv…
Burden of HIV and hepatitis C co-infection: the changing epidemiology of hepatitis C in HIV-infected patients in France.
2015
Équipe UB/CHU (EA) Pôle MERS CT3 Hors Enjeu; International audience; Background & AimsTo better evaluate the HIV-HCV co-infection burden in the context of new effective HCV treatment. MethodsWe reviewed all the epidemiological data available on HCV-related disease in HIV-infected patients in France. Sources of data have been selected using the following criteria: (i) prospective cohorts or cross-sectional surveys; (ii) conducted at a national level; (iii) in the HIV-infected population; (iv) able to identify HCV co-infection and chronic active hepatitis C (HCV RNA positive); and (v) conducted during the period 2003-2012. ResultsThe overall prevalence of HIV-HCV co-infection has decreased fr…
Reportage France 3 Bourgogne Franche-Comté. L’avenir du petit pois se décide à Chaux-des-Prés. Les recherches de l'INRA à Chaux-des-Prés (39). Depuis…
2019
Le 12 mars dernier, une équipe de France 3 Bourgogne s’est rendue sur le site Inra de Chaux-des-Prés pour voir comment les pois protéagineux résistent au températures hivernales extrêmes (jusqu’à -20 voire -30°C tous les ans). L’occasion pour le grand public d’en savoir plus sur les expérimentations conduites dans le cadre du programme de recherche PeaMUST.Pour rappel, PeaMUST vise à développer de nouvelles variétés de pois et à optimiser leurs interactions symbiotiques pour stabiliser le rendement et la qualité des graines de pois. Ceci, dans le contexte du changement climatique et de la réduction de l’utilisation des pesticides.
Les risques liés au climat. Cinquante ans de tempêtes... vues par Ouest-France
1997
National audience
Le Toarcien inférieur et moyen du Quercy méridional études stratigraphique, sédimentologique et paléoécologique d’après la nouvelle coupe de Caylus (…
2017
The study of a new section around Caylus (Tarn-et-Garonne) allows new biostratigraphic and sedimentological observations on the terms of passage from the Upper Pliensbachian (Formation of the Barre à Pecten) to the Toarcien (Formation de Penne) of the Quercy (France). The Schistes cartons member (Lower Toarcian, Serpentinum zone) is particularly remarkable.Four taxa of brachiopods and eleven taxa of Toarcian ammonites from the Tenuicostatum, Serpentinum and Bifrons zones, sub-zone to Sublevisoni are the subject of the following paleontological study.