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15 results on '"Baccou, J.C."'

6. Efficacité de la réduction de la masse des nutriments dans la prévention des malaïgues, application aux étangs palavasiens

Author

Ximenes, M.C., Lieutaud, A., Albiges, C., Pierre, D., Sagliocco, M., Raoul, Solène, Baccou, J.C., Patey, V., Lecomte, O., Picot, B., Moutin, T., Mesnage, V., Aménagements littoraux et Aquaculture (UR ALMO), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), Université des Sciences et Techniques du Languedoc, Université Montpellier 1 (UM1), and irstea

Subjects
PALAVAS, [SDE]Environmental Sciences, HERAULT, OR ETANG, PREVOST ETANG
Abstract

Ce document de synthèse était originellement accompagné des annexes suivantes : I-A. Évaluation des apports en azote et en phosphore des bassins versants (données statistiques et bibliographiques). Application aux etangs du departement de l'Hérault. I-B. Évaluation des apports en azote et en phosphore des bassins versants (approche préliminaire des mesures de flux). Application au bassin versant du Salaison. II. Cartographie et estimation des stocks de nutriments dans les sediments. Application aux étangs du complexe palavasien. III-A. Le fractionnement du phosphore en milieu saumâtre (etude bibliographique et comparaison de methodes). Application aux sediments de l'etang de l'Or. III-B. Échanges de phosphore eau-sediment en milieu saumatre (mesures du flux diffusif par peepers). Application aux etangs de l'Or et du Prevost. IV. Recherche de la limitation de Ia croissance des ulves par les nitrates et les phosphates (étude de terrain et de laboratoire). Application a l'etang du Prevost. V. Interventions pour reduire Ia masse de nutriments. Actions sur les bassins versants, les sédiments et les algues (analyse bibliographique et enquêtes). Application technique et économique aux lagunes palavasiennes. Le document numérisé joint ne comprend que les annexes, I-A, II, III-A, III-B

Published
1991

7. Pourridie et deperissement du jasmin. Approche par les techniques de culture in vitro et de culture hors sol et approche diagnostic. Rapport final 1990

Author

Robin, P., Montarone, M., Baccou, J.C., Jonard, J., Andary, C., Bertaux, F., Malezieux, M., DELECOLLE, Brigitte, ProdInra, Migration, Station d'agronomie et de physiologie végétale, Institut National de la Recherche Agronomique (INRA), and Unité de Pathologie Végétale (PV)

Subjects
[SDV] Life Sciences [q-bio], [SDV]Life Sciences [q-bio], JASMIN
Published
1990

12. Potential use of Cu 2+, K+ and Na+ for the destruction of Caulerpa taxifolia: differential effects on photosynthetic parameters.

Author

Uchimura, M., Rival, A., Nato, A., Sandeaux, R., Sandeaux, J., and Baccou, J.C.

Abstract

Chemical techniques were investigated in order to eradicate Caulerpa taxifolia, a green alga spreading at a remarkable rate in the Mediterranean Sea. The action of copper, potassium and sodium ions on survival rates and photosynthetic parameters was compared, in order to optimise the conditions of further in situ treatments. The lethal doses were determined and the impact of the studied cations on photosynthesis and respiration rates and PSII photochemistry was analysed from measurements of net oxygen exchanges and chlorophyll fluorescence. The Cu2+ concentrations required to obtain 100% mortality were 15 × 102 to 104 times lower than those of K+ and Na+. Respiration was slightly affected whatever the salt concentration,while photosynthesis could be totally inhibited depending on the applied treatment. Changes in the structure of the Ribulose-1,5-biphosphate carboxylase/oxygenase (RubisCO, EC: 4.1.1.39) were also detected when C. taxifolia under went cation treatments (10 mg L-1 Cu2+, 1h; 20 gL-1 K+, 3 h; 20 g L-1 Na+, 1 h). Given the high concentration and long incubation periods required with K+ and Na+ ions, these cations are not suitable to be used in situ. Our results make possible the utilisation of copper cations following technical approaches such asion-exchange textile covers, which allows a controlled release of cupric ions without dissemination in the marine environment. [ABSTRACT FROM AUTHOR]

Published
2000
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13. Composition of the Volatile Fraction of the Concrete of Jasminum azoricumL.

Author

Peyrot, E., Baccou, J.C., Pelissier, Y., and Bessière, J.M.

Abstract

ABSTRACTAnalytical investigation of a concrete of Jasminum azoricumL. by GC and GC/MS allowed us to identify about 40 constituents. The major components were (E,E)-farnesol (30.1%) and geranyl linalool (21.7%). The composition of the concrete is compared with a laboratory prepared concrete of Jasminum sambac(L.) Soland.

Published
1995
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14. Analysis of the Essential Oil of Wild Oregano from Martinique (Coleus aromaticusBenth.)—Evaluation of Its Bacteriostatic and Fungistatic Properties

Author

Prudent, D., Perineau, F., Bessiere, J.M., Michel, G.M., and Baccou, J.C.

Abstract

ABSTRACTThe secretory elements of the essential oil from Coleus aromaticusfrom Martinique were observed under the scanning electron microscope. The composition of the oil was analyzed and found to consist mainly of phenoh'c components, with carvacrol (72%) being the major compound. Five compounds were identified for the first time in the oil of C. aromaticus.They were (Z)-1,3-hexadiene (0.1%), (Z)-3-hexenol (0.6%), (E,Z)-α-farnesene (0.2%), (E.E)-α-farnesene (0.2%) and α-muurolene (0.2%). The biostatic activity of the leaf oil was tested on six bacterial and six fungal strains. It was found to have activity against Vibrio cholerawith a MIC of 0.125 mg/mL.

Published
1995
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