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CFD based determination of temperature and humidity at leaf surface Inra
Roy, J.C.; Vidal, C.; Fargues, J.; Boulard, T..
A numerical model based on the energy balance has been developed for computing with the Fluent CFD code temperature and humidity at leaf surface for low light levels. Crop transpiration and aerial flows were coupled and a single parameter model for the stomatal response of leaves to radiation flux has been considered. Validation of the results at leaf level has required an experimental setup based on Mu¨ nger cells to quantify temperature, relative humidity and the different heat fluxes for single bean leaves. experiments have been performed for three alternate low light/dark periods. It was shown that the agreement between numerical and experimental results increases with the airflow intensity: the results are in good agreement for air relative humidity...
Tipo: Journal Article Palavras-chave: COMPUTER SIMULATION; LEAF SURFACE; EVAPOTRANSPIRATION; STOMATAL RESISTANCE; INTEGRATED PEST MANAGEMENT; EVAPOTRANSPIRATION; BIOINSECTICIDE.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009f337c631&uri=/notices/prodinra1/2011/04/
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Species-specific composition of free amino acids on the leaf surface of four Senecio species Inra
Soldaat, L.L.; Boutin, J.P.; Derridj, S..
The specificity of the chemical composition of the leaf surface of four Senecio species was studied in order to understand the host selection of Tyria jacobaeae, a monophagous moth that has Senecio jacobaea as its principal host plant. Pyrrolizidine alkaloids characteristic for Senecio species were not detected in water and sulfuric acid extracts of the leaf surface of Senecio jacobaea. Water extracts of the leaf surfaces of S. jacobaea, S. vulgaris, S. viscosus, and S. sylvaticus contained low concentrations of free amino acids. The proportions of these amino acids were very different from those inside the leaf tissues. In a discriminant analysis, the four species could be completely separated on the basis of the relative proportions of amino acids on the...
Tipo: Journal Article Palavras-chave: CHIMIOTAXONOMIE; PHYLLOPLAN; ALCALOIDE; SENECIO AMINO ACIDS; LEAF SURFACE; CHEMOTAXONOMY; PHYLLOPLANE; PYRROLIZIDINE ALKALOIDS; SENECIO JACOBAEA; SENECIO SYLVATICUS; SENECIO VISCOSUS; SENECIO VULGARIS; TYRIA JACOBAEAE.
Ano: 1996 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9800002162070932&uri=/notices/prodinra1/2010/11/
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