2016Proceedings Article ER5 Auteurs : Khadra, Mariam; Joulin, Annabelle; Tittelein, Pierre; Lassue, Stéphane Modélisation d’un canal rectangulaire ventilé ouvert soumis à des sollicitations thermiques asymétriques et Analyse des échanges thermiques Dans: actes du Congrès Français de Thermique 2016, Toulouse, 2016, (ACTN). Résumé | Liens @inproceedings{khadra_modelisation_2016,
title = {Modélisation d’un canal rectangulaire ventilé ouvert soumis à des sollicitations thermiques asymétriques et Analyse des échanges thermiques},
author = {Mariam Khadra and Annabelle Joulin and Pierre Tittelein and Stéphane Lassue},
url = {http://www.sft.asso.fr/Local/sft/dir/user-3775/documents/actes/Congres_2016/resumes_toulouse/96.pdf},
year = {2016},
date = {2016-01-01},
booktitle = {actes du Congrès Français de Thermique 2016},
address = {Toulouse},
abstract = {Cet article traite de l’étude d’un système pariéto-dynamique destinée à la rénovation par l’extérieur des bâtiments. Le dispositif étudié est composé d’éléments opaques et est associé à une arrivée d'air extérieur permettant ainsi au fluide, en circulant entre les parois, de récupérer une partie de l'énergie solaire stockée et des déperditions thermiques à travers cette paroi. Dans le cadre de notre étude, des modélisations ont été conduites à l’aide du logiciel Fluent® et permettent de discuter de l’importance des paramètres physiques et dynamiques sur les transferts thermiques s’opérant à l’intérieur de la cavité ventilée. Cette étape nous permet également d’étudier le comportement du fluide en mouvement et d’analyser l’incidence du flux solaire absorbé sur les profils de vitesses et de températures.},
note = {ACTN},
keywords = {ER5},
pubstate = {published},
tppubtype = {inproceedings}
}
Cet article traite de l’étude d’un système pariéto-dynamique destinée à la rénovation par l’extérieur des bâtiments. Le dispositif étudié est composé d’éléments opaques et est associé à une arrivée d'air extérieur permettant ainsi au fluide, en circulant entre les parois, de récupérer une partie de l'énergie solaire stockée et des déperditions thermiques à travers cette paroi. Dans le cadre de notre étude, des modélisations ont été conduites à l’aide du logiciel Fluent® et permettent de discuter de l’importance des paramètres physiques et dynamiques sur les transferts thermiques s’opérant à l’intérieur de la cavité ventilée. Cette étape nous permet également d’étudier le comportement du fluide en mouvement et d’analyser l’incidence du flux solaire absorbé sur les profils de vitesses et de températures. |
2016Article de journal ER5 Auteurs : Kuznik, F; Johannes, K; Franquet, E; Zalewski, Laurent; Gibout, S; Tittelein, Pierre; Dumas, J -P; David, D; Bédécarrats, J -P; Lassue, Stéphane Impact of the enthalpy function on the simulation of a building with phase change material wall Dans: Energy and Buildings, vol. 126, p. 220–229, 2016, ISSN: 0378-7788, (ACL). Résumé | Liens @article{kuznik_impact_2016,
title = {Impact of the enthalpy function on the simulation of a building with phase change material wall},
author = {F Kuznik and K Johannes and E Franquet and Laurent Zalewski and S Gibout and Pierre Tittelein and J -P Dumas and D David and J -P Bédécarrats and Stéphane Lassue},
url = {http://www.sciencedirect.com/science/article/pii/S0378778816304157},
doi = {10.1016/j.enbuild.2016.05.046},
issn = {0378-7788},
year = {2016},
date = {2016-01-01},
urldate = {2016-05-27},
journal = {Energy and Buildings},
volume = {126},
pages = {220--229},
abstract = {Recent studies concerning phase change material (PCM) characterization show that important errors occur if differential scanning calorimetry (DSC) experiments are misinterpreted. Therefore, it is important to know the influence of such misinterpretation on system modeling. The present work deals with phase change materials integrated in building structure to reduce overheating. The objective is to evaluate the discrepancies consequences (temperatures, heat fluxes), due to the use of the misinterpreted DSC experiments at different heating rates to determine the enthalpy, in comparison with those determined with the actual value of the enthalpy of the PCM determined by a proven inverse method. A numerical model of a single-family house with a phase change material mortar is developed to evaluate the thermal comfort in the building. The results show that for free-running temperature, none of the enthalpy curve deduced directly from DSC can predict correctly the thermal behavior of the house and the thermal comfort. Moreover, the more the DSC heating rate and the more the discrepancy with the results from the reference inverse method.},
note = {ACL},
keywords = {ER5},
pubstate = {published},
tppubtype = {article}
}
Recent studies concerning phase change material (PCM) characterization show that important errors occur if differential scanning calorimetry (DSC) experiments are misinterpreted. Therefore, it is important to know the influence of such misinterpretation on system modeling. The present work deals with phase change materials integrated in building structure to reduce overheating. The objective is to evaluate the discrepancies consequences (temperatures, heat fluxes), due to the use of the misinterpreted DSC experiments at different heating rates to determine the enthalpy, in comparison with those determined with the actual value of the enthalpy of the PCM determined by a proven inverse method. A numerical model of a single-family house with a phase change material mortar is developed to evaluate the thermal comfort in the building. The results show that for free-running temperature, none of the enthalpy curve deduced directly from DSC can predict correctly the thermal behavior of the house and the thermal comfort. Moreover, the more the DSC heating rate and the more the discrepancy with the results from the reference inverse method. |
2016Conférence ER4 Auteurs : Branchu, Philippe; Joimel, Sophie; Douay, Francis; Lefebvre, Gaëtan; Rémy, Elisabeth; Béchet, Béatrice; Neel, Catherine; Dumat, Camille; Scimia, Jennifer; Schwartz, Christophe Risques environnemetaux et sanitaires dans les jardins AFPP – 4ème conférence sur l’entretien des jardins végétalisés et infrastructures, 19-20 octobre 2016, Toulouse, 2016, (COM). Résumé @conference{Branchu2016,
title = {Risques environnemetaux et sanitaires dans les jardins},
author = {Philippe Branchu and Sophie Joimel and Francis Douay and Gaëtan Lefebvre and Elisabeth Rémy and Béatrice Béchet and Catherine Neel and Camille Dumat and Jennifer Scimia and Christophe Schwartz},
year = {2016},
date = {2016-01-01},
booktitle = {AFPP – 4ème conférence sur l’entretien des jardins végétalisés et infrastructures, 19-20 octobre 2016, Toulouse},
abstract = {L’objectif de cet exposé est de discuter de quelle façon, dans certains cas, l’état du système sol (cf. présentation de c. schwartz) peut constituer un risque pour l’environnement et/ou un risque sanitaire pour les usagers des jardins et/ou les consommateurs de légumes y poussant. la limite entre contamination (présence en concentrations anormales de substances potentiellement dangereuses) et pollution (dans le cas où ces concentrations peuvent induire une nuisance ou un risque pour l’homme et/ou l’environnement) n’étant pas définie sur le plan réglementaire en france, on se trouve parfois en situation d’incertitude que la réalisation d’une évaluation quantitative des risques sanitaires ne lève pas complètement, tant les hypothèses associées au calcul sont nombreuses. la situation des sites étudiés dans le projet jassur est discutée en termes de fertilité, de contamination en éléments traces métalliques, de biodiversité et de risques environnementaux. des exemples d’évaluations quantitatives des risques sanitaires de jardins seront présentés. enfin nous verrons de quelles façons certaines collectivités, à l’étranger, se sont appuyés sur la connaissance scientifique du système et sur le dire d’experts en cas d’incertitudes pour proposer des lignes directrices visant à la création de jardins associatifs en milieu urbain},
note = {COM},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
L’objectif de cet exposé est de discuter de quelle façon, dans certains cas, l’état du système sol (cf. présentation de c. schwartz) peut constituer un risque pour l’environnement et/ou un risque sanitaire pour les usagers des jardins et/ou les consommateurs de légumes y poussant. la limite entre contamination (présence en concentrations anormales de substances potentiellement dangereuses) et pollution (dans le cas où ces concentrations peuvent induire une nuisance ou un risque pour l’homme et/ou l’environnement) n’étant pas définie sur le plan réglementaire en france, on se trouve parfois en situation d’incertitude que la réalisation d’une évaluation quantitative des risques sanitaires ne lève pas complètement, tant les hypothèses associées au calcul sont nombreuses. la situation des sites étudiés dans le projet jassur est discutée en termes de fertilité, de contamination en éléments traces métalliques, de biodiversité et de risques environnementaux. des exemples d’évaluations quantitatives des risques sanitaires de jardins seront présentés. enfin nous verrons de quelles façons certaines collectivités, à l’étranger, se sont appuyés sur la connaissance scientifique du système et sur le dire d’experts en cas d’incertitudes pour proposer des lignes directrices visant à la création de jardins associatifs en milieu urbain |
2016Proceedings Article ER5 Auteurs : Tittelein, Pierre; Leang, Enghok; Zalewski, Laurent; Lassue, Stéphane Comparaison des bibliothèques libres de Modelica pour la simulation thermique dynamique du bâtiment. Dans: actes de la conférence IBPSA France 2016, Marne la Valée, 2016, (ACTN). Résumé @inproceedings{tittelein_comparaison_2016,
title = {Comparaison des bibliothèques libres de Modelica pour la simulation thermique dynamique du bâtiment.},
author = {Pierre Tittelein and Enghok Leang and Laurent Zalewski and Stéphane Lassue},
year = {2016},
date = {2016-01-01},
booktitle = {actes de la conférence IBPSA France 2016},
address = {Marne la Valée},
abstract = {Le langage Modelica est de plus en plus utilisé dans toutes les branches de l'ingénierie pour la modélisation à l'échelle système. Il s'agit d'un langage orienté objet basé sur les équations et donc fait pour les physiciens au sens large). Dans le domaine du bâtiment, il commence également à se développer et plusieurs bibliothèques de modèles sont maintenant disponibles gratuitement.
L'objectif de cet article est d'aider les personnes qui souhaitent réaliser des modèles de systèmes ou de composants de bâtiments dans le langage Modelica et qui ne savent pas dans quelle bibliothèque l'intégrer. Pour cela, l'idée est de comparer les bibliothèques libres de Modelica pouvant servir à la simulation thermique dynamique des bâtiments. La comparaison ne porte pas sur les performances des modèles mais plutôt sur leurs fonctionnalités et les grands choix de développement réalisés. Nous utilisons l'exemple de l'intégration d'un modèle de fenêtre pariétodynamique pour étayer nos propos.},
note = {ACTN},
keywords = {ER5},
pubstate = {published},
tppubtype = {inproceedings}
}
Le langage Modelica est de plus en plus utilisé dans toutes les branches de l'ingénierie pour la modélisation à l'échelle système. Il s'agit d'un langage orienté objet basé sur les équations et donc fait pour les physiciens au sens large). Dans le domaine du bâtiment, il commence également à se développer et plusieurs bibliothèques de modèles sont maintenant disponibles gratuitement.
L'objectif de cet article est d'aider les personnes qui souhaitent réaliser des modèles de systèmes ou de composants de bâtiments dans le langage Modelica et qui ne savent pas dans quelle bibliothèque l'intégrer. Pour cela, l'idée est de comparer les bibliothèques libres de Modelica pouvant servir à la simulation thermique dynamique des bâtiments. La comparaison ne porte pas sur les performances des modèles mais plutôt sur leurs fonctionnalités et les grands choix de développement réalisés. Nous utilisons l'exemple de l'intégration d'un modèle de fenêtre pariétodynamique pour étayer nos propos. |
2016Proceedings Article ER5 Auteurs : Zalewski, Laurent; Tittelein, Pierre; Defer, Didier; Lassue, Stéphane Characterization of phase change material with fluxmetric experimental device Dans: Oral presentation, Krakow, Poland, 2016, (COM). @inproceedings{zalewski_characterization_2016,
title = {Characterization of phase change material with fluxmetric experimental device},
author = {Laurent Zalewski and Pierre Tittelein and Didier Defer and Stéphane Lassue},
year = {2016},
date = {2016-06-01},
booktitle = {Oral presentation},
address = {Krakow, Poland},
note = {COM},
keywords = {ER5},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2016Conférence ER5 Auteurs : Ba, Amadou; Lavie, Antoine; Leblanc, Alexandre Soft 3D printed membrane type-acoustic metamaterials 23rd International Congress on Sound & Vibration, Ath`enes, Gr`ece (10-14 juillet 2016), 2016, (ACTI). @conference{Ba2016,
title = {Soft 3D printed membrane type-acoustic metamaterials},
author = {Amadou Ba and Antoine Lavie and Alexandre Leblanc},
year = {2016},
date = {2016-01-01},
booktitle = {23rd International Congress on Sound & Vibration, Ath`enes, Gr`ece (10-14 juillet 2016)},
note = {ACTI},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2016Conférence ER4 Auteurs : Liné, Clarisse; Gruyer, Nicolas; Dorais, Martine; Al-Souki, Karim; Pourrut, Bertrand Development of a high-throughput multi-parameter biomarker set for plant biomonitoring and ecotoxicological studies International Conference on Occupational & Environmental Toxicology, 21-23 June 2016, Porto (Portugal), 2016, (AFF). Résumé @conference{Line2016,
title = {Development of a high-throughput multi-parameter biomarker set for plant biomonitoring and ecotoxicological studies},
author = {Clarisse Liné and Nicolas Gruyer and Martine Dorais and Karim Al-Souki and Bertrand Pourrut},
year = {2016},
date = {2016-01-01},
booktitle = {International Conference on Occupational & Environmental Toxicology, 21-23 June 2016, Porto (Portugal)},
abstract = {During the last decade plants have been increasingly used in ecotoxicological studies and environmental biomonitoring. however, despite an obvious interest, their uses have been mainly limited by a time-consuming and operator-dependent extraction step. moreover, most of the studies have been limited to the evaluation of few biomarkers limiting their sensitivity and relevance. thus, it appears there is a need to develop some alternative, fast, cost-efficient and reliable protocols able to evaluate plant health on hundreds to thousands of samples. in this frame, we have developed of a fully automatic extraction technique which increases drastically its speed and efficiency, while also enhancing reproducibility and reliability. indeed, this fully automatic extraction step totally abolishes the operatorrelated variability. moreover, this extraction step, performed in 96 deep well plates, is directly compatible with assays using 96 well microplates. meanwhile, we have worked on the miniaturization in 96 well microplates of the so far routinely used biomarker assays: antioxidant enzymes activities, lipid peroxidation, photosynthetic pigments content. in order to have a better overview of plant health, we have developed complementary miniaturised biomarker assays: rubisco activity, sucrose metabolism enzyme activities, secondary metabolites contents (phenols, flavonoids). so far, the high-throughput multi-parameter biomarker set we have developed enables to analyze of dozen of biomarkers on 384 plant samples per day, allowing large biomonitoring campaigns.},
note = {AFF},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
During the last decade plants have been increasingly used in ecotoxicological studies and environmental biomonitoring. however, despite an obvious interest, their uses have been mainly limited by a time-consuming and operator-dependent extraction step. moreover, most of the studies have been limited to the evaluation of few biomarkers limiting their sensitivity and relevance. thus, it appears there is a need to develop some alternative, fast, cost-efficient and reliable protocols able to evaluate plant health on hundreds to thousands of samples. in this frame, we have developed of a fully automatic extraction technique which increases drastically its speed and efficiency, while also enhancing reproducibility and reliability. indeed, this fully automatic extraction step totally abolishes the operatorrelated variability. moreover, this extraction step, performed in 96 deep well plates, is directly compatible with assays using 96 well microplates. meanwhile, we have worked on the miniaturization in 96 well microplates of the so far routinely used biomarker assays: antioxidant enzymes activities, lipid peroxidation, photosynthetic pigments content. in order to have a better overview of plant health, we have developed complementary miniaturised biomarker assays: rubisco activity, sucrose metabolism enzyme activities, secondary metabolites contents (phenols, flavonoids). so far, the high-throughput multi-parameter biomarker set we have developed enables to analyze of dozen of biomarkers on 384 plant samples per day, allowing large biomonitoring campaigns. |
2016Conférence ER4 Auteurs : Liné, Clarisse; Gruyer, Nicolas; Dorais, Martine; Al-Souki, Karim; Pourrut, Bertrand Development of a high-throughput multi-parameter biomarker set for plant biomonitoring and ecotoxicological studies International Conference Contaminated Sites 2016, 12-13 September 2016, Bratislava (Slovakia), 2016, (ACTI). Résumé @conference{Line2016a,
title = {Development of a high-throughput multi-parameter biomarker set for plant biomonitoring and ecotoxicological studies},
author = {Clarisse Liné and Nicolas Gruyer and Martine Dorais and Karim Al-Souki and Bertrand Pourrut},
year = {2016},
date = {2016-01-01},
booktitle = {International Conference Contaminated Sites 2016, 12-13 September 2016, Bratislava (Slovakia)},
abstract = {During the last decade plants have been increasingly used in ecotoxicological studies and environmental biomonitoring (walker et al., 2012). in order to evaluate the impact of stress (biotic or abiotic) on plants, it is important to evaluate plant health. this can be realized at the macroscopic scale (growth, number of leaves, dry weight, fresh weight…) or at the molecular scale, using biomarkers. evaluation of plants health using biomarkers can be relevant especially if numerous biomarkers are combined (amiard-triquet et al., 2012). nowadays, a reduced set of biomarkers is used to determine plant health because some biomarker evaluation methods are costly, time-consuming and have high variability (operator-dependent extraction step). thus, the two main limits of the current methods are: lack of sensitivity and reliability: the small number of biomarkers does not allow an accurate evaluation of plant health; low-throughput: the small number of analyzed samples is not compatible with large scale experiments (i.e. biomonitoring studies). it appears there is a need to develop an alternative, fast, cost-efficient and reliable high-throughput method able to evaluate plant health in ecotoxicological studies. the main objectives of our work were to: develop high-throughput extraction method; develop high-throughput analysis method; compare this method with classic methods.},
note = {ACTI},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
During the last decade plants have been increasingly used in ecotoxicological studies and environmental biomonitoring (walker et al., 2012). in order to evaluate the impact of stress (biotic or abiotic) on plants, it is important to evaluate plant health. this can be realized at the macroscopic scale (growth, number of leaves, dry weight, fresh weight…) or at the molecular scale, using biomarkers. evaluation of plants health using biomarkers can be relevant especially if numerous biomarkers are combined (amiard-triquet et al., 2012). nowadays, a reduced set of biomarkers is used to determine plant health because some biomarker evaluation methods are costly, time-consuming and have high variability (operator-dependent extraction step). thus, the two main limits of the current methods are: lack of sensitivity and reliability: the small number of biomarkers does not allow an accurate evaluation of plant health; low-throughput: the small number of analyzed samples is not compatible with large scale experiments (i.e. biomonitoring studies). it appears there is a need to develop an alternative, fast, cost-efficient and reliable high-throughput method able to evaluate plant health in ecotoxicological studies. the main objectives of our work were to: develop high-throughput extraction method; develop high-throughput analysis method; compare this method with classic methods. |
2016Article de journal ER4 Auteurs : Thiéry, Vincent; Rolin, Patrick; Dubois, Michel; Caumon, Marie-Camille; Goncalves, Philippe Reply to J. Berger's comment on the article “Discovery of metamorphic microdiamonds from the parautochthonous units of the Variscan French Massif” by Thiéry, V. et al.,. (2015), Gondwana Research 28, 954–960 Dans: Gondwana Research, vol. 38, p. 372-374, 2016, (ACL). Résumé @article{Thiery2016,
title = {Reply to J. Berger's comment on the article “Discovery of metamorphic microdiamonds from the parautochthonous units of the Variscan French Massif” by Thiéry, V. et al.,. (2015), Gondwana Research 28, 954–960},
author = {Vincent Thiéry and Patrick Rolin and Michel Dubois and Marie-Camille Caumon and Philippe Goncalves},
year = {2016},
date = {2016-01-01},
journal = {Gondwana Research},
volume = {38},
pages = {372-374},
abstract = {We are pleased to see that our recently published article (thiéry et al., 2015) is discussed (berger, 2015); in the following lines we will give some precisions and thoughts about the comment. this is not the first time that a documentation of microdiamond within metamorphic terranes is discussed (mposkos and kostopoulos, 2001; beyssac and chopin, 2003; mposkos and kostopoulos, 2003), revealing the complexity of the unraveling of uhp metamorphism. several points are to be addressed, concerning both the need for precision about the samples themselves and the need for a more thorough estimation of p–t conditions},
note = {ACL},
keywords = {ER4},
pubstate = {published},
tppubtype = {article}
}
We are pleased to see that our recently published article (thiéry et al., 2015) is discussed (berger, 2015); in the following lines we will give some precisions and thoughts about the comment. this is not the first time that a documentation of microdiamond within metamorphic terranes is discussed (mposkos and kostopoulos, 2001; beyssac and chopin, 2003; mposkos and kostopoulos, 2003), revealing the complexity of the unraveling of uhp metamorphism. several points are to be addressed, concerning both the need for precision about the samples themselves and the need for a more thorough estimation of p–t conditions |
2016Article de journal ER4 Auteurs : Lloret, Emily; Dessert, Céline; Buss, Heather-L.; Chaduteau, Carine; Huon, Sylvain; Alberic, Patrick; Benedetti, Marc-F. Sources of dissolved organic carbon in small volcanic mountainous tropical rivers, examples from Guadeloupe Dans: Geoderma, vol. 282, p. 129-138, 2016, (ACL). Résumé @article{Lloret2016,
title = {Sources of dissolved organic carbon in small volcanic mountainous tropical rivers, examples from Guadeloupe},
author = {Emily Lloret and Céline Dessert and Heather-L. Buss and Carine Chaduteau and Sylvain Huon and Patrick Alberic and Marc-F. Benedetti},
year = {2016},
date = {2016-01-01},
journal = {Geoderma},
volume = {282},
pages = {129-138},
abstract = {In the tropical zone, small watersheds are affected by intense meteorological events. these events play an important role in the erosion of soils and therefore on the sources of organic carbon in small tropical rivers. we studied the geochemistry of two soils on basse-terre island (french west indies, fwi): ferralitic soil and andosol. the two studied soils are very similar in terms of soil organic matter (som) and soil solution parameters. the total organic carbon (toc) and total nitrogen (tn) contents vary between 1.7 and 92 g kg‐1 and between 0.1 and 5.5 g kg‐1, respectively, with the highest concentrations observed in the topsoil. the c/n ratios are relatively constant throughout the soil profiles (ca. 12). the carbon isotopic composition of som varies between ‐27.3‰ and ‐22.7‰ and presents an enrichment with increasing depth of soil profiles. dissolved organic carbon (doc) concentrations in soil solutions, varying from 3.2 to 91.3 mg l‐1, are similar for the both extraction used in lab (with milliq water and ca(no3)2) but are higher than those measured in soil solutions sampled from lysimeters (0.65–1.46 mg l‐1). the isotopic compositions of doc obtained by extractions and som are comparable, with δ13c values ranging from ‐28.6‰ to ‐25.8‰. the doc sampled from lysimeters is systematically depleted in 13c compared to doc obtained by extractions, with δ13c values of ‐33.8‰ to ‐30.6‰. the enrichment of δ13c of som through the soil profiles is either consistent with the carbon isotopic fractionation of som by decomposing organisms, or the differential mineralization of both labile and stable carbon stocks in soils. doc concentrations in stream waters vary between 0.46 and 5.75 mg l‐1, and are generally lower during low water level than floods. the isotopic compositions of doc in the rivers range from ‐38.9‰ to ‐27.2‰, with δ13c values, which are more depleted in 13c during low water level than flood events. the δ13cdoc of water river samples and soil solutions obtained by extraction and collected with lysimeters demonstrates that the doc in rivers derives essentially from both the lixiviation of the soil surface layers during floods and groundwater flow during low water levels. lixiviation of soil surface layers can be boosted by significant increases of intensity and duration of meteorological events and can strongly favor the release of surface soil organic matter in rivers and the impoverishment in nutrients of soil surface layers.},
note = {ACL},
keywords = {ER4},
pubstate = {published},
tppubtype = {article}
}
In the tropical zone, small watersheds are affected by intense meteorological events. these events play an important role in the erosion of soils and therefore on the sources of organic carbon in small tropical rivers. we studied the geochemistry of two soils on basse-terre island (french west indies, fwi): ferralitic soil and andosol. the two studied soils are very similar in terms of soil organic matter (som) and soil solution parameters. the total organic carbon (toc) and total nitrogen (tn) contents vary between 1.7 and 92 g kg‐1 and between 0.1 and 5.5 g kg‐1, respectively, with the highest concentrations observed in the topsoil. the c/n ratios are relatively constant throughout the soil profiles (ca. 12). the carbon isotopic composition of som varies between ‐27.3‰ and ‐22.7‰ and presents an enrichment with increasing depth of soil profiles. dissolved organic carbon (doc) concentrations in soil solutions, varying from 3.2 to 91.3 mg l‐1, are similar for the both extraction used in lab (with milliq water and ca(no3)2) but are higher than those measured in soil solutions sampled from lysimeters (0.65–1.46 mg l‐1). the isotopic compositions of doc obtained by extractions and som are comparable, with δ13c values ranging from ‐28.6‰ to ‐25.8‰. the doc sampled from lysimeters is systematically depleted in 13c compared to doc obtained by extractions, with δ13c values of ‐33.8‰ to ‐30.6‰. the enrichment of δ13c of som through the soil profiles is either consistent with the carbon isotopic fractionation of som by decomposing organisms, or the differential mineralization of both labile and stable carbon stocks in soils. doc concentrations in stream waters vary between 0.46 and 5.75 mg l‐1, and are generally lower during low water level than floods. the isotopic compositions of doc in the rivers range from ‐38.9‰ to ‐27.2‰, with δ13c values, which are more depleted in 13c during low water level than flood events. the δ13cdoc of water river samples and soil solutions obtained by extraction and collected with lysimeters demonstrates that the doc in rivers derives essentially from both the lixiviation of the soil surface layers during floods and groundwater flow during low water levels. lixiviation of soil surface layers can be boosted by significant increases of intensity and duration of meteorological events and can strongly favor the release of surface soil organic matter in rivers and the impoverishment in nutrients of soil surface layers. |
2016Conférence ER4 Auteurs : Vandenbulcke, Franck Nanoparticles in waste: New threat? ASSM (Advances in Sustainable Sewage sludge Management) 2016 International Conference, 18-22 September 2016, Cracovie (Pologne), 2016, (INV). @conference{Vandenbulcke2016,
title = {Nanoparticles in waste: New threat?},
author = {Franck Vandenbulcke},
year = {2016},
date = {2016-01-01},
booktitle = {ASSM (Advances in Sustainable Sewage sludge Management) 2016 International Conference, 18-22 September 2016, Cracovie (Pologne)},
note = {INV},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
|
2016Conférence ER5 Auteurs : Leblanc, Alexandre; Lavie, Antoine 3D printed membrane-type acoustic metamaterials with structured masses J. Acoust. Soc. Am., 140, n$,^circ$4, 3104, Honolulu, USA, vol. 140, no. 4, ASA, 2016, (ACTI). Liens @conference{Leblanc2016,
title = {3D printed membrane-type acoustic metamaterials with structured masses},
author = {Alexandre Leblanc and Antoine Lavie},
doi = {http://dx.doi.org/10.1121/1.4969687},
year = {2016},
date = {2016-01-01},
booktitle = {J. Acoust. Soc. Am., 140, n$,^circ$4, 3104, Honolulu, USA},
volume = {140},
number = {4},
pages = {3104},
publisher = {ASA},
note = {ACTI},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2016Conférence ER5 Auteurs : Lefebvre, Jérôme; Leblanc, Alexandre; Genestie, Benoît; Chartier, Thierry; Lavie, Antoine Acoustic properties of aerogel encapsulated by macroporous cellulose 23rd International Congress on Sound & Vibration, Athènes, Grèce, 2016, (ACTI). @conference{Lefebvre2016,
title = {Acoustic properties of aerogel encapsulated by macroporous cellulose},
author = {Jérôme Lefebvre and Alexandre Leblanc and Benoît Genestie and Thierry Chartier and Antoine Lavie},
year = {2016},
date = {2016-01-01},
booktitle = {23rd International Congress on Sound & Vibration, Athènes, Grèce},
note = {ACTI},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2016Article de journal ER1 Auteurs : Yang, Wei; Zaoui, Ali Capture and sequestration of CO2 in the interlayer space of hydrated calcium Montmorillonite clay under various geological burial depth Dans: Physica A: Statistical Mechanics and its Applications, no. 449, p. 416-425, 2016, (ACL). @article{greenwade93,
title = {Capture and sequestration of CO2 in the interlayer space of hydrated calcium Montmorillonite clay under various geological burial depth},
author = {Wei Yang and Ali Zaoui},
year = {2016},
date = {2016-01-01},
journal = {Physica A: Statistical Mechanics and its Applications},
number = {449},
pages = {416-425},
note = {ACL},
keywords = {ER1},
pubstate = {published},
tppubtype = {article}
}
|
2016Article de journal ER5 Auteurs : Chauchois, Alexis; Defer, Didier; Choi, H; Antczak, Emmanuel; Brachelet, Franck; Asli, Mounir Development of a Cylindrical Probe Designed for Thermal Characterization of Granular Materials Dans: Transport in Porous Media, vol. 112, no. 3, p. 549–561, 2016, ISSN: 1573-1634, (ACL). Résumé | Liens @article{chau2016ab,
title = {Development of a Cylindrical Probe Designed for Thermal Characterization of Granular Materials},
author = {Alexis Chauchois and Didier Defer and H Choi and Emmanuel Antczak and Franck Brachelet and Mounir Asli},
url = {http://dx.doi.org/10.1007/s11242-016-0656-4},
doi = {10.1007/s11242-016-0656-4},
issn = {1573-1634},
year = {2016},
date = {2016-01-01},
journal = {Transport in Porous Media},
volume = {112},
number = {3},
pages = {549--561},
abstract = {This article describes a new thermophysical characterization method
for granular materials. It is based on the creation of a cylindrical
probe, fitted with peripheral flux and temperature sensors. These
sensors record changes in thermal variables in the case of cylindrically
symmetrical heat diffusion. A numerical exchange model integrated
into an inversion algorithm identifies the thermal effusivity and
diffusivity of the material being tested and the sensor/material
contact resistance. In this first study, the method was applied to
dry sand.},
note = {ACL},
keywords = {ER5},
pubstate = {published},
tppubtype = {article}
}
This article describes a new thermophysical characterization method
for granular materials. It is based on the creation of a cylindrical
probe, fitted with peripheral flux and temperature sensors. These
sensors record changes in thermal variables in the case of cylindrically
symmetrical heat diffusion. A numerical exchange model integrated
into an inversion algorithm identifies the thermal effusivity and
diffusivity of the material being tested and the sensor/material
contact resistance. In this first study, the method was applied to
dry sand. |
2016Article de journal ER1 Auteurs : Adli, W; Zaoui, Ali; Ferhat, M First-principles calculations of electronic and magnetic properties in ferromagnetic MnSeS, MnSeTe and MnSePo ternary systems Dans: J Supercond Nov Magn, no. 29, p. 1-7, 2016, (ACL). @article{Zaoui2016,
title = {First-principles calculations of electronic and magnetic properties in ferromagnetic MnSeS, MnSeTe and MnSePo ternary systems},
author = {W Adli and Ali Zaoui and M Ferhat},
year = {2016},
date = {2016-01-01},
journal = {J Supercond Nov Magn},
number = {29},
pages = {1-7},
note = {ACL},
keywords = {ER1},
pubstate = {published},
tppubtype = {article}
}
|
2016Conférence ER5 Auteurs : Asli, Mounir; Brachelet, Franck; Derbal, Radhouan; Chauchois, Alexis; Antczak, Emmanuel; Defer, Didier Numerical and experimental investigation of simultaneous heat and mass transfer within bio-based material ECOS 2016, Portorož Slovenia 2016, (ACTI). @conference{Asli2016b,
title = {Numerical and experimental investigation of simultaneous heat and mass transfer within bio-based material},
author = {Mounir Asli and Franck Brachelet and Radhouan Derbal and Alexis Chauchois and Emmanuel Antczak and Didier Defer},
year = {2016},
date = {2016-01-01},
booktitle = {ECOS 2016},
organization = {Portorož Slovenia},
note = {ACTI},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2016Conférence ER5 Auteurs : Sastre, Maria Teresa Tejedor; Leblanc, Alexandre; Lavie, Antoine; Vanhille, Christian Finite-element simulations of nonlinear focused ultrasound in bubbly liquids 23rd International Congress on Sound & Vibration, Ath`enes, Gr`ece (10-14 juillet 2016), 2016, (ACTI). @conference{TejedorSastre2016,
title = {Finite-element simulations of nonlinear focused ultrasound in bubbly liquids},
author = {Maria Teresa Tejedor Sastre and Alexandre Leblanc and Antoine Lavie and Christian Vanhille},
year = {2016},
date = {2016-01-01},
booktitle = {23rd International Congress on Sound & Vibration, Ath`enes, Gr`ece (10-14 juillet 2016)},
note = {ACTI},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2016Article de journal ER1 Auteurs : Belmiloud, N; Zaoui, Ali; Madouri, D; Ferhat, Mohamed Exploring global phase stability of (VN)(1)/(InN)(1) and (CrN)(1)/(GaN)(1) superlattices from densityfunctional theory Dans: Supperlattices and Microstructures, no. 100, p. 667-672, 2016, (ACL). @article{Belmiloud2016,
title = {Exploring global phase stability of (VN)(1)/(InN)(1) and (CrN)(1)/(GaN)(1) superlattices from densityfunctional theory},
author = {N Belmiloud and Ali Zaoui and D Madouri and Mohamed Ferhat},
year = {2016},
date = {2016-01-01},
journal = {Supperlattices and Microstructures},
number = {100},
pages = {667-672},
note = {ACL},
keywords = {ER1},
pubstate = {published},
tppubtype = {article}
}
|
2016Article de journal ER1 Auteurs : Torrichi, M; Zaoui, Ali; Ferhat, M Magnetism of 3d Transition Metals Doped 2H, 4H and 6H-GaN Polytypes Dans: J Supercond Nov Magn, p. doi:10.1007/s10948-016-3917-0, 2016, (ACL). @article{Torrichi2016,
title = {Magnetism of 3d Transition Metals Doped 2H, 4H and 6H-GaN Polytypes},
author = {M Torrichi and Ali Zaoui and M Ferhat},
year = {2016},
date = {2016-01-01},
journal = {J Supercond Nov Magn},
pages = {doi:10.1007/s10948-016-3917-0},
note = {ACL},
keywords = {ER1},
pubstate = {published},
tppubtype = {article}
}
|
2016Thèse ER5 Auteurs : Benmessaoudi, Warda; Younsi, Zohir; Vololonirina, Oly Modélisation et simulation numérique du transfert de chaleur dans un mur à stockage passif”, Master 2 “Modélisation et simulation en mécanique et énergétique Université de Paul Sabatier, 2016, (MASTER). @mastersthesis{Benmessaoudi2016,
title = {Modélisation et simulation numérique du transfert de chaleur dans un mur à stockage passif”, Master 2 “Modélisation et simulation en mécanique et énergétique},
author = {Warda Benmessaoudi and Zohir Younsi and Oly Vololonirina},
year = {2016},
date = {2016-01-01},
school = {Université de Paul Sabatier},
note = {MASTER},
keywords = {ER5},
pubstate = {published},
tppubtype = {mastersthesis}
}
|
2016Article de journal ER1 Auteurs : Benaissa, H; Zaoui, Ali; Ferhat, M Ferromagnetism-dependent polytypism: CrAs versus MnAs Dans: Solid State Communications, no. 247, p. 98-103, 2016, (ACL). @article{Benaissa2016,
title = {Ferromagnetism-dependent polytypism: CrAs versus MnAs},
author = {H Benaissa and Ali Zaoui and M Ferhat},
year = {2016},
date = {2016-01-01},
journal = {Solid State Communications},
number = {247},
pages = {98-103},
note = {ACL},
keywords = {ER1},
pubstate = {published},
tppubtype = {article}
}
|
2016Article de journal ER1 Auteurs : Yang, Wei; Zaoui, Ali Mineralization of CO2 in hydrated calcium Montmorillonite, Dans: PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, no. 464, p. 191-197, 2016, (ACL). @article{Yang2016,
title = {Mineralization of CO2 in hydrated calcium Montmorillonite,},
author = {Wei Yang and Ali Zaoui},
year = {2016},
date = {2016-01-01},
journal = {PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS},
number = {464},
pages = {191-197},
note = {ACL},
keywords = {ER1},
pubstate = {published},
tppubtype = {article}
}
|
2016Conférence ER4 Auteurs : Canavese, Marine; Bouquet, Dorine; Grenet, Marie; Lebeau, Thierry; Béchet, Béatrice; Le-Guern, Cécile; Douay, Francis; Pinte, Emilie; Berthier, Nathalie; Branchu, Philippe; Cambier, Philippe; Rémy, Elisabeth La qualité des sols urbains entre en politique: du désordre aux nouveaux agencements sociotechniques dans les jardins collectifs urbains Colloque "ordres et désordres au jardin", 23-24 mars 2016, Strasbourg, 2016, (COM). @conference{Canavese2016,
title = {La qualité des sols urbains entre en politique: du désordre aux nouveaux agencements sociotechniques dans les jardins collectifs urbains},
author = {Marine Canavese and Dorine Bouquet and Marie Grenet and Thierry Lebeau and Béatrice Béchet and Cécile Le-Guern and Francis Douay and Emilie Pinte and Nathalie Berthier and Philippe Branchu and Philippe Cambier and Elisabeth Rémy},
year = {2016},
date = {2016-01-01},
booktitle = {Colloque "ordres et désordres au jardin", 23-24 mars 2016, Strasbourg},
note = {COM},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
|
2016Article de journal ER4 Auteurs : Carlier, Erick; Khattabi, Jamal El Impact of global warming on Intensity-Duration-Frequency (IDF) relationship of precipitation: A case study of Toronto, Canada Dans: Open Journal of Modern Hydrology, vol. 6, p. 1-7, 2016, (ACLO). Résumé @article{Carlier2016,
title = {Impact of global warming on Intensity-Duration-Frequency (IDF) relationship of precipitation: A case study of Toronto, Canada},
author = {Erick Carlier and Jamal El Khattabi},
year = {2016},
date = {2016-01-01},
journal = {Open Journal of Modern Hydrology},
volume = {6},
pages = {1-7},
abstract = {Annual maximum rainfall intensity for several duration and return periods has been analyzed according to the gumbel distribution. the intensity-duration-frequency (idf) curves before and after 1980 have been computed and compared. for the city of toronto, it is shown that the rainfall intensities after 1980 are lower than those from before this date. this is especially clear for those of short duration. comparing our results with those of other authors, it appears that, for the moment, no general law on the impact of global warming on the curves intensity duration frequency cannot be made. it appears that the impact of global warming on rainfall varies with geographic location and that it is not possible to draw some general conclusions across the planet.},
note = {ACLO},
keywords = {ER4},
pubstate = {published},
tppubtype = {article}
}
Annual maximum rainfall intensity for several duration and return periods has been analyzed according to the gumbel distribution. the intensity-duration-frequency (idf) curves before and after 1980 have been computed and compared. for the city of toronto, it is shown that the rainfall intensities after 1980 are lower than those from before this date. this is especially clear for those of short duration. comparing our results with those of other authors, it appears that, for the moment, no general law on the impact of global warming on the curves intensity duration frequency cannot be made. it appears that the impact of global warming on rainfall varies with geographic location and that it is not possible to draw some general conclusions across the planet. |
2016Conférence ER5 Auteurs : Koufi, Lounes; Younsi, Zohir; Cherif, Yassine; Naji, Hassane Numerical investigation and analysis of indoor air quality in a room based on Impinging jet ventilation Int. Conference On Materials and Energy ICOME’16, La Rochelle, France, 17-20 May 2016., 2016, (ACTI). @conference{Koufi2016,
title = {Numerical investigation and analysis of indoor air quality in a room based on Impinging jet ventilation},
author = {Lounes Koufi and Zohir Younsi and Yassine Cherif and Hassane Naji},
year = {2016},
date = {2016-01-01},
booktitle = {Int. Conference On Materials and Energy ICOME’16, La Rochelle, France, 17-20 May 2016.},
note = {ACTI},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2016Thèse ER4 Auteurs : Carnoye, Leslie Les services écosystémiques: de nouveaux outils de justification au service de la critique écologiste? Une analyse conventionnaliste à partir du Parc Naturel Régional Scarpe-Escaut (France) Thèse de l’Université de Lille 1, 542pp, 2016, (TH). Résumé @phdthesis{Carnoye2016,
title = {Les services écosystémiques: de nouveaux outils de justification au service de la critique écologiste? Une analyse conventionnaliste à partir du Parc Naturel Régional Scarpe-Escaut (France)},
author = {Leslie Carnoye},
year = {2016},
date = {2016-01-01},
school = {Thèse de l’Université de Lille 1, 542pp},
abstract = {Le paradoxe des "services écosystémiques" est qu’ils tendent à devenir aujourd'hui un référentiel dominant en matière de conservation et de protection de la biodiversité, mais qu’ils restent, dans le même temps, une approche très controversée, notamment dans le champ de l’economie ecologique. le présent travail de thèse vise à interroger le potentiel transformateur de l’approche par les services écosystémiques, vis-à-vis des dynamiques institutionnelles qui régissent les rapports entre la conservation et le développement. pour ce faire, nous nous basons sur une étude de cas précise : celle du parc naturel régional scarpe-escaut, dans le département du nord. nous y avons réalisé une expérience d’observation participante, dans le cadre d’un projet d’évaluation de services écosystémiques sur le territoire. nous avons également conduit des entretiens semi-directifs avec un certain nombre de représentants du parc et étudié ses documents de gestion, à l’aide d’un logiciel d’analyse de données textuelles (prospéro). le cadre théorique mobilisé est celui de l’economie des conventions. l’apport de la thèse est de proposer de modéliser l’écologisme non pas sous la forme idéale de la cité, mais comme une critique du capitalisme, au sens de boltanski et chiapello (1999). selon nous, les principales formes de critiques écologistes contemporaines sont la décroissance, le développement durable et la croissance verte et ces dernières s’appuient sur différentes formes de compromis entre plusieurs ordres de grandeur.notre analyse nous amène à penser que la place des services écosystémiques, comme outils de justification au service du parc scarpe-escaut doit être relativisée. ce qui donne du sens au projet de conservation et de développement porté par le parc est en effet la mobilisation d’un registre domestique, alors que les fondements normatifs des services écosystémiques reposent plutôt sur les cités marchande et par-projets. les services écosystémiques peuvent ainsi être compris comme des dispositifs importants de la critique écologiste de la croissance verte, laquelle s’avère peu subversive vis-à-vis du capitalisme connexionniste.},
note = {TH},
keywords = {ER4},
pubstate = {published},
tppubtype = {phdthesis}
}
Le paradoxe des "services écosystémiques" est qu’ils tendent à devenir aujourd'hui un référentiel dominant en matière de conservation et de protection de la biodiversité, mais qu’ils restent, dans le même temps, une approche très controversée, notamment dans le champ de l’economie ecologique. le présent travail de thèse vise à interroger le potentiel transformateur de l’approche par les services écosystémiques, vis-à-vis des dynamiques institutionnelles qui régissent les rapports entre la conservation et le développement. pour ce faire, nous nous basons sur une étude de cas précise : celle du parc naturel régional scarpe-escaut, dans le département du nord. nous y avons réalisé une expérience d’observation participante, dans le cadre d’un projet d’évaluation de services écosystémiques sur le territoire. nous avons également conduit des entretiens semi-directifs avec un certain nombre de représentants du parc et étudié ses documents de gestion, à l’aide d’un logiciel d’analyse de données textuelles (prospéro). le cadre théorique mobilisé est celui de l’economie des conventions. l’apport de la thèse est de proposer de modéliser l’écologisme non pas sous la forme idéale de la cité, mais comme une critique du capitalisme, au sens de boltanski et chiapello (1999). selon nous, les principales formes de critiques écologistes contemporaines sont la décroissance, le développement durable et la croissance verte et ces dernières s’appuient sur différentes formes de compromis entre plusieurs ordres de grandeur.notre analyse nous amène à penser que la place des services écosystémiques, comme outils de justification au service du parc scarpe-escaut doit être relativisée. ce qui donne du sens au projet de conservation et de développement porté par le parc est en effet la mobilisation d’un registre domestique, alors que les fondements normatifs des services écosystémiques reposent plutôt sur les cités marchande et par-projets. les services écosystémiques peuvent ainsi être compris comme des dispositifs importants de la critique écologiste de la croissance verte, laquelle s’avère peu subversive vis-à-vis du capitalisme connexionniste. |
2016Article de journal ER4 Auteurs : Mamadou, Marah-Mamane; Cathelineau, Michel; Bourdelle, Franck; Boiron, Marie-Christine; Elmaleh, Agnès; Brouand, Marc Hot fluid flows around a major fault identified by paleothermometric studies (Tim Mersoï Basin, Niger) Dans: Journal of Sedimentary Research, vol. 86, no. 8, p. 914-928, 2016, (ACL). Résumé @article{Mamadou2016,
title = {Hot fluid flows around a major fault identified by paleothermometric studies (Tim Mersoï Basin, Niger)},
author = {Marah-Mamane Mamadou and Michel Cathelineau and Franck Bourdelle and Marie-Christine Boiron and Agnès Elmaleh and Marc Brouand},
year = {2016},
date = {2016-01-01},
journal = {Journal of Sedimentary Research},
volume = {86},
number = {8},
pages = {914-928},
abstract = {Faults are mostly considered as low-permeability zones due to their frequent sealing, but they can also contribute significantly to fluid movements in sedimentary basins, and subsequently to temperature anomalies. in favorable cases, paleo-temperatures and pressures can be determined from fluid-inclusion and chlorite thermometry. using this approach, we estimate the temperature gap between incoming fluids and host rocks along the arlit fault, a major fault affecting the whole series of continental siliciclastic formations from paleozoic to late jurassic in the tim mersoï basin (niger). strong alteration halos and uranium deposits occur along this regional north–south-trending fault, as well as a secondary network of ne–sw faults. sandstone porosity is partially reduced by authigenic quartz and fe-rich trioctahedral chlorites. the chlorites precipitated directly from the solutions under reducing conditions, prior to uranium-oxide deposition. the temperatures and pressures are estimated to be around 115–150 °c and 80–120 bars respectively, and are remarkably similar in all formations from the carboniferous to the jurassic. these temperatures are much higher, around 60–80 °c, than those estimated at maximum burial, and document hot fluid flow along the major fault. this thermal anomaly is inferred to be related to the opening of the atlantic ocean during the cretaceous, before the onset of the main exhumation stages during the mid-tertiary. this study documents the role of faults as significant conduits for fluid flow, and their role in the mass and heat transfer related to the formation of economic deposits.},
note = {ACL},
keywords = {ER4},
pubstate = {published},
tppubtype = {article}
}
Faults are mostly considered as low-permeability zones due to their frequent sealing, but they can also contribute significantly to fluid movements in sedimentary basins, and subsequently to temperature anomalies. in favorable cases, paleo-temperatures and pressures can be determined from fluid-inclusion and chlorite thermometry. using this approach, we estimate the temperature gap between incoming fluids and host rocks along the arlit fault, a major fault affecting the whole series of continental siliciclastic formations from paleozoic to late jurassic in the tim mersoï basin (niger). strong alteration halos and uranium deposits occur along this regional north–south-trending fault, as well as a secondary network of ne–sw faults. sandstone porosity is partially reduced by authigenic quartz and fe-rich trioctahedral chlorites. the chlorites precipitated directly from the solutions under reducing conditions, prior to uranium-oxide deposition. the temperatures and pressures are estimated to be around 115–150 °c and 80–120 bars respectively, and are remarkably similar in all formations from the carboniferous to the jurassic. these temperatures are much higher, around 60–80 °c, than those estimated at maximum burial, and document hot fluid flow along the major fault. this thermal anomaly is inferred to be related to the opening of the atlantic ocean during the cretaceous, before the onset of the main exhumation stages during the mid-tertiary. this study documents the role of faults as significant conduits for fluid flow, and their role in the mass and heat transfer related to the formation of economic deposits. |
2016Conférence ER5 Auteurs : Koufi, Lounes; Cherif, Yassine; Younsi, Zohir; Naji, Hassane Simulation numérique du transport d'un aérocontaminant dans une cavité ventilée Congrès Français de Thermique 2016, Toulouse, France, 31 Mai-03 Juin 2016., 2016, (ACTN). @conference{Koufi2016a,
title = {Simulation numérique du transport d'un aérocontaminant dans une cavité ventilée},
author = {Lounes Koufi and Yassine Cherif and Zohir Younsi and Hassane Naji},
year = {2016},
date = {2016-01-01},
booktitle = {Congrès Français de Thermique 2016, Toulouse, France, 31 Mai-03 Juin 2016.},
note = {ACTN},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2016Thèse ER5 Auteurs : Lakhdari, Yahia Abdelhamid; Chikh, Salah; Younsi, Zohir Utilisation des matériaux à changement de phase dans le bâtiment USTHB Alger-Algérie, 2016, (MASTER). @mastersthesis{Lakhdari2016,
title = {Utilisation des matériaux à changement de phase dans le bâtiment},
author = {Yahia Abdelhamid Lakhdari and Salah Chikh and Zohir Younsi},
year = {2016},
date = {2016-01-01},
school = {USTHB Alger-Algérie},
note = {MASTER},
keywords = {ER5},
pubstate = {published},
tppubtype = {mastersthesis}
}
|
2016Conférence ER5 Auteurs : Bekkouche, Mohammed Samai Rachid Djeffal Mohamed; Younsi, Zohir; Benamrane, Nacer; Cherier, Mohamed Comportement thermique d’une maison inerte dans une période d'intersaison propice à l’intégration des MCPs 4th Int. Seminar on New and Renewable Energies, Ghardaïa, Algérie 24 et 25 Octobre 2016., 2016, (ACTI). @conference{MCPs2016,
title = {Comportement thermique d’une maison inerte dans une période d'intersaison propice à l’intégration des MCPs},
author = {Mohammed Samai Rachid Djeffal Mohamed Bekkouche and Zohir Younsi and Nacer Benamrane and Mohamed Cherier},
year = {2016},
date = {2016-01-01},
booktitle = {4th Int. Seminar on New and Renewable Energies, Ghardaïa, Algérie 24 et 25 Octobre 2016.},
note = {ACTI},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2016Conférence ER4 Auteurs : Cheviron, Nathalie; Gattin, Isabelle; Criquet, Steven; Marrauld, Christelle; Laval, Karine; Peres, Guenola; Bispo, Antonio; Béguiristain, Thierry; Faure, Olivier; Douay, Francis; Hitmi, Adnane; Mougin, Christian Effect of the type of contamination and land use on soil enzymatic activities: results of the french « Bioindicators program » SETAC Europe. 22-26 mai 2016, Nantes, 2016, (ACTI). Résumé @conference{Cheviron2016,
title = {Effect of the type of contamination and land use on soil enzymatic activities: results of the french « Bioindicators program »},
author = {Nathalie Cheviron and Isabelle Gattin and Steven Criquet and Christelle Marrauld and Karine Laval and Guenola Peres and Antonio Bispo and Thierry Béguiristain and Olivier Faure and Francis Douay and Adnane Hitmi and Christian Mougin},
year = {2016},
date = {2016-01-01},
booktitle = {SETAC Europe. 22-26 mai 2016, Nantes},
abstract = {Since many decades, enzymatic activities are used to assess the effects of land use changes, agricultural practices and soil contamination on soil functioning. a lot of studies point out contradictory results depending notably on the methodology used, as well as soil characteristics… to overcome the lack of consensus concerning indicators available to assess soil quality and functioning, the national research program “bioindicators” (overseen by ademe) was set up in france to develop and assay biological indicators (2006–2012). we aimed at standardizing and emphasizing the number of biochemical measurements, and developed miniaturized colorimetric methods to obtain a great enzymatic dataset. thirteen activities (from three laboratories) were measured within this programme, in 47 modalities of 13 experimental sites differing in terms of land use (corine land cover), contamination type – polycyclic aromatic hydrocarbures or metals – and pollution levels (vibrisse 8th decile). this dataset allows an analysis of the effect of atmospheric or added contamination gradients on the enzymatic activities. our objectives are to point out the sensitivity of enzymes for each type of pollution and land use, to offer the most appropriate panel for a sensible analysis. data were analysed for the all datasets, each site and each land use. our main conclusions are as follows: enzymes are more sensitive to metallic contamination than to organic ones; enzymes are good indicators of metal bioavailability; alkaline phosphatase and arylamidase are the most relevant enzymes to assess the effect of soil contamination.},
note = {ACTI},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
Since many decades, enzymatic activities are used to assess the effects of land use changes, agricultural practices and soil contamination on soil functioning. a lot of studies point out contradictory results depending notably on the methodology used, as well as soil characteristics… to overcome the lack of consensus concerning indicators available to assess soil quality and functioning, the national research program “bioindicators” (overseen by ademe) was set up in france to develop and assay biological indicators (2006–2012). we aimed at standardizing and emphasizing the number of biochemical measurements, and developed miniaturized colorimetric methods to obtain a great enzymatic dataset. thirteen activities (from three laboratories) were measured within this programme, in 47 modalities of 13 experimental sites differing in terms of land use (corine land cover), contamination type – polycyclic aromatic hydrocarbures or metals – and pollution levels (vibrisse 8th decile). this dataset allows an analysis of the effect of atmospheric or added contamination gradients on the enzymatic activities. our objectives are to point out the sensitivity of enzymes for each type of pollution and land use, to offer the most appropriate panel for a sensible analysis. data were analysed for the all datasets, each site and each land use. our main conclusions are as follows: enzymes are more sensitive to metallic contamination than to organic ones; enzymes are good indicators of metal bioavailability; alkaline phosphatase and arylamidase are the most relevant enzymes to assess the effect of soil contamination. |
2015Article de journal ER4 Auteurs : Cosmidis, Julie; Benzerara, Karim; Nassif, Nadine; Tyliszczak, Tolek; Bourdelle, Franck Characterization of Ca-phosphate biological materials by scanning transmission X-ray microscopy (STXM) at the Ca L2,3-, P L2,3- and C K-edges Dans: Acta Biomaterialia, vol. 12, p. 260-269, 2015, (ACL). Résumé @article{Cosmidis2015,
title = {Characterization of Ca-phosphate biological materials by scanning transmission X-ray microscopy (STXM) at the Ca L2,3-, P L2,3- and C K-edges},
author = {Julie Cosmidis and Karim Benzerara and Nadine Nassif and Tolek Tyliszczak and Franck Bourdelle},
year = {2015},
date = {2015-01-01},
journal = {Acta Biomaterialia},
volume = {12},
pages = {260-269},
abstract = {Several naturally occurring biological materials, including bones
and teeth, pathological calcifications, microbial mineral deposits
formed in marine phosphogenesis areas, as well as bio-inspired cements
used for bone and tooth repair are composed of Ca-phosphates. These
materials are usually identified and characterized using bulk-scale
analytical tools such as X-ray diffraction, Fourier transform infrared
spectroscopy or nuclear magnetic resonance. However, there is a need
for imaging techniques that provide information on the spatial distribution
and chemical composition of the Ca-phosphate phases at the micrometer-
and nanometer scales. Such analyses provide insightful indications
on how the materials may have formed, e.g. through transient precursor
phases that eventually remain spatially separated from the mature
phase. Here, we present scanning transmission X-ray microscopy (STXM)
analyses of Ca-phosphate reference compounds, showing the feasibility
of fingerprinting Ca-phosphate-based materials. We calibrate methods
to determine important parameters of Ca-phosphate phases, such as
their Ca/P ratio and carbonate content at the ∼25 nm scale, using
X-ray absorption near-edge spectra at the C K-, Ca L2,3- and P L2,3-edges.
As an illustrative case study, we also perform STXM analyses on hydroxyapatite
precipitates formed in a dense fibrillar collagen matrix. This study
paves the way for future research on Ca-phosphate biomineralization
processes down to the scale of a few tens of nanometers.},
note = {ACL},
keywords = {ER4},
pubstate = {published},
tppubtype = {article}
}
Several naturally occurring biological materials, including bones
and teeth, pathological calcifications, microbial mineral deposits
formed in marine phosphogenesis areas, as well as bio-inspired cements
used for bone and tooth repair are composed of Ca-phosphates. These
materials are usually identified and characterized using bulk-scale
analytical tools such as X-ray diffraction, Fourier transform infrared
spectroscopy or nuclear magnetic resonance. However, there is a need
for imaging techniques that provide information on the spatial distribution
and chemical composition of the Ca-phosphate phases at the micrometer-
and nanometer scales. Such analyses provide insightful indications
on how the materials may have formed, e.g. through transient precursor
phases that eventually remain spatially separated from the mature
phase. Here, we present scanning transmission X-ray microscopy (STXM)
analyses of Ca-phosphate reference compounds, showing the feasibility
of fingerprinting Ca-phosphate-based materials. We calibrate methods
to determine important parameters of Ca-phosphate phases, such as
their Ca/P ratio and carbonate content at the ∼25 nm scale, using
X-ray absorption near-edge spectra at the C K-, Ca L2,3- and P L2,3-edges.
As an illustrative case study, we also perform STXM analyses on hydroxyapatite
precipitates formed in a dense fibrillar collagen matrix. This study
paves the way for future research on Ca-phosphate biomineralization
processes down to the scale of a few tens of nanometers. |
2015Conférence ER5 Auteurs : Younsi, Zohir; Naji, Hassane Numerical study of the thermal behavior of a wall containing microencapsulated PCM 6th Int. Renewable Energy Congress IREC'2015, March 24 - 26, 2015, Sousse, Tunisia., 2015, (ACTI). @conference{Younsi2015,
title = {Numerical study of the thermal behavior of a wall containing microencapsulated PCM},
author = {Zohir Younsi and Hassane Naji},
year = {2015},
date = {2015-01-01},
booktitle = {6th Int. Renewable Energy Congress IREC'2015, March 24 - 26, 2015, Sousse, Tunisia.},
note = {ACTI},
keywords = {ER5},
pubstate = {published},
tppubtype = {conference}
}
|
2015Conférence ER4 Auteurs : Crognier, Nemo; Hoareau, Guilhem; Lacroix, Brice; Aubourg, Charles; Branellec, Mathieu; Dubois, Michel; Lahfid, Abdeltif; Labaume, Pierre; Suarez-Ruiz, Isabel Thermicité et circulation de fluides associés lors de la structuration du bassin d’avant-pays sud Pyrénéen (SPFB) Association des Sédimentologues Français, 13-15 octobre 2015, Chambéry, 2015, (ACTN). @conference{Crognier2015,
title = {Thermicité et circulation de fluides associés lors de la structuration du bassin d’avant-pays sud Pyrénéen (SPFB)},
author = {Nemo Crognier and Guilhem Hoareau and Brice Lacroix and Charles Aubourg and Mathieu Branellec and Michel Dubois and Abdeltif Lahfid and Pierre Labaume and Isabel Suarez-Ruiz},
year = {2015},
date = {2015-01-01},
booktitle = {Association des Sédimentologues Français, 13-15 octobre 2015, Chambéry},
note = {ACTN},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
|
2015Article de journal ER5 Auteurs : Amrani, Abdelilah; Dihmani, Nadia; Amraqui, Samir; Mezrhab, Ahmed; Naji, Hassane Modelling of natural convection with radiation in a triple-glazed ventilated window Dans: Journal of Thermophysics and Heat Transfer, vol. 29, no. 4, p. 795-804, 2015, (ACL). Résumé | Liens @article{Amrani2015,
title = {Modelling of natural convection with radiation in a triple-glazed ventilated window},
author = {Abdelilah Amrani and Nadia Dihmani and Samir Amraqui and Ahmed Mezrhab and Hassane Naji},
doi = {https://doi.org/10.2514/1.T4532},
year = {2015},
date = {2015-01-01},
journal = {Journal of Thermophysics and Heat Transfer},
volume = {29},
number = {4},
pages = {795-804},
abstract = {Windows are major elements in the construction of buildings. They can significantly contribute in the heat exchange between the outside and inside environments of a building. The main aim of this work is to estimate the thermal performance of a building interior due to heat flow through a window that also contributes to room ventilation. For this purpose, we studied numerically the coupling of natural convection heat transfer with the radiation of the glass surfaces that occur in a supply-air Paziaud window. The latter is composed of three panes of glass separated by ventilated U-shaped air gaps. The numerical solution is obtained using a finite volume method based on the SIMPLER algorithm for the treatment of velocity-pressure coupling. Concerning the radiation exchange, we consider that the working fluid is transparent, so only the solid surfaces contribute to the radiation exchange and assumed to be diffuse-gray. The effects of Rayleigh number, aspect ratio, and blind geometry on the convective and radiation heat transfer are examined in detail.},
note = {ACL},
keywords = {ER5},
pubstate = {published},
tppubtype = {article}
}
Windows are major elements in the construction of buildings. They can significantly contribute in the heat exchange between the outside and inside environments of a building. The main aim of this work is to estimate the thermal performance of a building interior due to heat flow through a window that also contributes to room ventilation. For this purpose, we studied numerically the coupling of natural convection heat transfer with the radiation of the glass surfaces that occur in a supply-air Paziaud window. The latter is composed of three panes of glass separated by ventilated U-shaped air gaps. The numerical solution is obtained using a finite volume method based on the SIMPLER algorithm for the treatment of velocity-pressure coupling. Concerning the radiation exchange, we consider that the working fluid is transparent, so only the solid surfaces contribute to the radiation exchange and assumed to be diffuse-gray. The effects of Rayleigh number, aspect ratio, and blind geometry on the convective and radiation heat transfer are examined in detail. |
2015Conférence ER4 Auteurs : Crognier, Nemo; Hoareau, Guilhem; Lacroix, Brice; Aubourg, Charles; Dubois, Michel; Lahfid, Abdeltif; Labaume, Pierre; Suarez-Ruiz, Isabel Couplage des analyses isotopiques, de la microthermométrie sur inclusions fluides et du Δ47: le cas des Sierras Exteriores (Chevauchement frontal sud Pyrénéen, Espagne) Association des Sédimentologues Français, 13-15 octobre 2015, Chambéry, 2015, (ACTN). @conference{Crognier2015a,
title = {Couplage des analyses isotopiques, de la microthermométrie sur inclusions fluides et du Δ47: le cas des Sierras Exteriores (Chevauchement frontal sud Pyrénéen, Espagne)},
author = {Nemo Crognier and Guilhem Hoareau and Brice Lacroix and Charles Aubourg and Michel Dubois and Abdeltif Lahfid and Pierre Labaume and Isabel Suarez-Ruiz},
year = {2015},
date = {2015-01-01},
booktitle = {Association des Sédimentologues Français, 13-15 octobre 2015, Chambéry},
note = {ACTN},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
|
2015Conférence ER4 Auteurs : Muchembled, Jérôme; Corroyer, N; Deweer, Caroline; Dupont, N; Sahmer, Karin; Halama, Patrice; Larrieu, J F; Le-Maguet, J; Navarro, J M; Tournant, L; Vidal, R Evaluation au laboratoire et aux vergers de l'efficacité d'huiles essentielles sur Venturia sp 5th International Conference on Alternative Methods of Crop Protection, 11-13 mars 2015, Lille, 2015, (AFF). Résumé @conference{Muchembled2015,
title = {Evaluation au laboratoire et aux vergers de l'efficacité d'huiles essentielles sur Venturia sp},
author = {Jérôme Muchembled and N Corroyer and Caroline Deweer and N Dupont and Karin Sahmer and Patrice Halama and J F Larrieu and J Le-Maguet and J M Navarro and L Tournant and R Vidal},
year = {2015},
date = {2015-01-01},
booktitle = {5th International Conference on Alternative Methods of Crop Protection, 11-13 mars 2015, Lille},
abstract = {The effectiveness of 7 essential oils on spores of venturia inaequalis, the fungus that causes apple scab, was studied as part of a casdar project "evaluation of the benefits of using essential oils crop protection" (2013-2015). a resistant strain (r) to triazoles fungicides compared with a sensitive strain (s) is tested in liquid medium with 7 essential oils and also with metconazole, copper sulfate and sulfur. all these modalities are added or not with an adjuvant (terpene alcohol) and the ic50 are calculated after several independent experiments. the results show that some of the 7 essential oils are more effective than others on the 2 strains (clove and eucalyptus). the strain r is much more sensitive to copper sulfate than the strain s. similarly, the strain r seems to be more sensitive to the essential oils than the strain s. if the in vitro use of an adjuvant significantly increased the efficiency of copper sulfate and metconazole, it does not increase the effectiveness of essential oils and sulfur. tests orchards are underway to determine the interest not only of essential oils in organic agriculture (compared to copper) but also, by extension, in integrated fruit production},
note = {AFF},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
The effectiveness of 7 essential oils on spores of venturia inaequalis, the fungus that causes apple scab, was studied as part of a casdar project "evaluation of the benefits of using essential oils crop protection" (2013-2015). a resistant strain (r) to triazoles fungicides compared with a sensitive strain (s) is tested in liquid medium with 7 essential oils and also with metconazole, copper sulfate and sulfur. all these modalities are added or not with an adjuvant (terpene alcohol) and the ic50 are calculated after several independent experiments. the results show that some of the 7 essential oils are more effective than others on the 2 strains (clove and eucalyptus). the strain r is much more sensitive to copper sulfate than the strain s. similarly, the strain r seems to be more sensitive to the essential oils than the strain s. if the in vitro use of an adjuvant significantly increased the efficiency of copper sulfate and metconazole, it does not increase the effectiveness of essential oils and sulfur. tests orchards are underway to determine the interest not only of essential oils in organic agriculture (compared to copper) but also, by extension, in integrated fruit production |
2015Conférence ER4 Auteurs : Muchembled, Jérôme; Deweer, Caroline; Emile, L; Brehault, L; Gelin, D; Zavodski, J; Sahmer, Karin; Halama, Patrice Développement du biocontrôle et substances naturelles végétales : que nous apprennent les essais au laboratoire ? Application sur 2 souches de Phytophthora infestans S et R méfénoxam 11ème Conférence Internationale sur les Maladies des Plantes, 7-9 décembre 2015, Tours, 2015, (AFF). @conference{Muchembled2015a,
title = {Développement du biocontrôle et substances naturelles végétales : que nous apprennent les essais au laboratoire ? Application sur 2 souches de Phytophthora infestans S et R méfénoxam},
author = {Jérôme Muchembled and Caroline Deweer and L Emile and L Brehault and D Gelin and J Zavodski and Karin Sahmer and Patrice Halama},
year = {2015},
date = {2015-01-01},
booktitle = {11ème Conférence Internationale sur les Maladies des Plantes, 7-9 décembre 2015, Tours},
note = {AFF},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
|
2015Conférence ER1 Auteurs : Mengue, E; Mroueh, Hussein; Lancelot, Laurent; Eko, R Medjo One-dimensional consolidation behavior of cement treated lateritic soil vol. 6, 2015, (ACTI). Liens @conference{Mengue20153237,
title = {One-dimensional consolidation behavior of cement treated lateritic soil},
author = {E Mengue and Hussein Mroueh and Laurent Lancelot and R Medjo Eko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964466820&partnerID=40&md5=a0e8b3830f755af888f8bb51f1e99bd0},
year = {2015},
date = {2015-01-01},
journal = {Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015},
volume = {6},
pages = {3237-3242},
note = {ACTI},
keywords = {ER1},
pubstate = {published},
tppubtype = {conference}
}
|
2015Thèse ER4 Auteurs : Waterlot, Christophe Les éléments métalliques : Intérêt, analyse et devenir dans les sols contaminés : une source potentielle d’innovation en synthèse organique HDR Université Lille 1, 358pp, 2015, (TH HDR). Résumé @phdthesis{Waterlot2015a,
title = {Les éléments métalliques : Intérêt, analyse et devenir dans les sols contaminés : une source potentielle d’innovation en synthèse organique},
author = {Christophe Waterlot},
year = {2015},
date = {2015-01-01},
school = {HDR Université Lille 1, 358pp},
abstract = {Les éléments métalliques sont souvent mentionnés comme étant indispensables à la synthèse de molécules chimiques en une ou plusieurs étapes. parmi toutes les réactions qui permettent d’illustrer ce constat, citons les réactions d’acylation et d’alkylation de friedel-crafts ou encore les réactions de vinylation de type heck. parallèlement, la contamination des sols par les éléments métalliques est au cœur des préoccupations des instances régionales, nationales et internationales. ceci tient au fait que ces sols présentent des concentrations élevées en éléments métalliques en raison d’une industrialisation et d’une urbanisation très présentes mais aussi, à des comportements variables des éléments métalliques selon leurs spécificités, les paramètres physico-chimiques et biologiques des sols. il en résulte des questionnements en lien avec les problèmes environnementaux et sanitaires et de façon plus globale, des interrogations en lien avec la gestion durable de ces sols. le travail exposé dans mon mémoire porte sur une approche transversale qui pourrait amener in fine à gérer durablement des sols contaminés à partir de matériaux verts et ceci, au service de la synthèse organique. dans un premier volet, il décrit l’intérêt d’utiliser la montmorillonite k10 imprégnée par des éléments métalliques comme d’une part, le zinc dans les réactions de friedel-crafts et d’autre part, le cuivre et le plomb dans les réactions de vinylation des amines aromatiques mais aussi, les effets synergiques entre les éléments métalliques complexés et le motif hydroquinonique présents sur un copolymère régénérable doté de bonnes propriétés en lien avec la réduction du dioxygène dissous dans l’eau. dans un second volet, le mémoire dresse une synthèse des travaux collaboratifs menés au sein du laboratoire génie civil et géo-environnement (lgcge). ils visent à contribuer durablement à la gestion des sols affectés à des degrés divers par deux fonderies de plomb et de zinc connues pour avoir par le passé rejeté des quantités considérables de poussières métalliques dans l’atmosphère. la démarche présentée s’articule autour de 3 axes de recherche : l’analyse des éléments métalliques par spectrométrie d’absorption atomique et les problèmes liés aux interférences spectrales, l’étude du comportement des éléments métalliques dans les sols selon leurs usages (agricoles, urbains et forestiers) au travers de leur mobilité (extractions séquentielles et simples) et de leur phytodisponibilité, l’évaluation des effets de techniques de remédiation (phytostabilisation et/ou immobilisation par voie chimique) sur le comportement des éléments métalliques. le lien qui apparaît entre l’utilisation des éléments métalliques pour la synthèse de macromolécules et ceux présents dans les sols contaminés constitue mon projet de recherche. [...]},
note = {TH HDR},
keywords = {ER4},
pubstate = {published},
tppubtype = {phdthesis}
}
Les éléments métalliques sont souvent mentionnés comme étant indispensables à la synthèse de molécules chimiques en une ou plusieurs étapes. parmi toutes les réactions qui permettent d’illustrer ce constat, citons les réactions d’acylation et d’alkylation de friedel-crafts ou encore les réactions de vinylation de type heck. parallèlement, la contamination des sols par les éléments métalliques est au cœur des préoccupations des instances régionales, nationales et internationales. ceci tient au fait que ces sols présentent des concentrations élevées en éléments métalliques en raison d’une industrialisation et d’une urbanisation très présentes mais aussi, à des comportements variables des éléments métalliques selon leurs spécificités, les paramètres physico-chimiques et biologiques des sols. il en résulte des questionnements en lien avec les problèmes environnementaux et sanitaires et de façon plus globale, des interrogations en lien avec la gestion durable de ces sols. le travail exposé dans mon mémoire porte sur une approche transversale qui pourrait amener in fine à gérer durablement des sols contaminés à partir de matériaux verts et ceci, au service de la synthèse organique. dans un premier volet, il décrit l’intérêt d’utiliser la montmorillonite k10 imprégnée par des éléments métalliques comme d’une part, le zinc dans les réactions de friedel-crafts et d’autre part, le cuivre et le plomb dans les réactions de vinylation des amines aromatiques mais aussi, les effets synergiques entre les éléments métalliques complexés et le motif hydroquinonique présents sur un copolymère régénérable doté de bonnes propriétés en lien avec la réduction du dioxygène dissous dans l’eau. dans un second volet, le mémoire dresse une synthèse des travaux collaboratifs menés au sein du laboratoire génie civil et géo-environnement (lgcge). ils visent à contribuer durablement à la gestion des sols affectés à des degrés divers par deux fonderies de plomb et de zinc connues pour avoir par le passé rejeté des quantités considérables de poussières métalliques dans l’atmosphère. la démarche présentée s’articule autour de 3 axes de recherche : l’analyse des éléments métalliques par spectrométrie d’absorption atomique et les problèmes liés aux interférences spectrales, l’étude du comportement des éléments métalliques dans les sols selon leurs usages (agricoles, urbains et forestiers) au travers de leur mobilité (extractions séquentielles et simples) et de leur phytodisponibilité, l’évaluation des effets de techniques de remédiation (phytostabilisation et/ou immobilisation par voie chimique) sur le comportement des éléments métalliques. le lien qui apparaît entre l’utilisation des éléments métalliques pour la synthèse de macromolécules et ceux présents dans les sols contaminés constitue mon projet de recherche. [...] |
2015Conférence ER4 Auteurs : Muchembled, Jérôme; Deweer, Caroline; Sahmer, Karin; Halama, Patrice Evaluation in vitro de l'efficacité de 7 huiles essentielles sur une souche de Venturia inaequalis résistante au triazoles Les rencontres du végétal, 12-13 janvier 2015, Angers, 2015, (COM). Résumé @conference{Muchembled2015b,
title = {Evaluation in vitro de l'efficacité de 7 huiles essentielles sur une souche de Venturia inaequalis résistante au triazoles},
author = {Jérôme Muchembled and Caroline Deweer and Karin Sahmer and Patrice Halama},
year = {2015},
date = {2015-01-01},
booktitle = {Les rencontres du végétal, 12-13 janvier 2015, Angers},
abstract = {Porté par l’itab et financé par le ministère de l’agriculture, le projet casdar intitulé « évaluation de l’intérêt d’utiliser des huiles essentielles en protection des cultures » (2013-2015) se propose d’étudier l’efficacité biofongicide in vitro et in planta de plusieurs huiles essentielles sur plusieurs modèles biologiques dans le cadre d’une démarche prospective. il s’agit dans le cas présent d’étudier l’efficacité de 7 huiles essentielles sur les spores de venturia inaequalis, le champignon responsable de la tavelure du pommier. deux souches sont utilisées : une souche résistante aux fongicides de type triazoles comparativement à une souche sensible. les 7 huiles essentielles et 2 fongicides de références de type metconazole et sulfate de cuivre (cuso4) sont testés sur les 2 souches. les expériences sont réalisées en milieu liquide en microplaques et la gamme de concentrations employée permet de calculer les ci50 pour chaque modalité grâce à l’aide d’une régression non linéaire. les expérimentations sont réalisées au moins trois fois de manière indépendantes et permettent de réaliser des tests statistiques de type anova. parmi les 7 huiles essentielles, les résultats montrent sur les 2 souches que certaines sont plus efficaces que d’autres. les résultats montrent aussi que la souche résistante metconazole est beaucoup plus sensible au cuivre que ne l’est la souche sensible. de même, la souche résistante semble parfois plus sensible aux huiles essentielles que la souche sensible. si le metconazole reste la molécule fongicide la plus efficace sur les 2 souches, les huiles essentielles sont aussi ou plus efficaces que le cuivre sur la souche sensible. ces résultats tendent à démontrer au laboratoire que le comportement des souches r et s triazoles est différent non seulement par rapport au cuivre mais aussi par rapport aux huiles essentielles. les tests aux vergers devront montrer l’intérêt des huiles essentielles dans des modes de production biologique (comparativement au cuivre) et des modes de production plus conventionnelle},
note = {COM},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
Porté par l’itab et financé par le ministère de l’agriculture, le projet casdar intitulé « évaluation de l’intérêt d’utiliser des huiles essentielles en protection des cultures » (2013-2015) se propose d’étudier l’efficacité biofongicide in vitro et in planta de plusieurs huiles essentielles sur plusieurs modèles biologiques dans le cadre d’une démarche prospective. il s’agit dans le cas présent d’étudier l’efficacité de 7 huiles essentielles sur les spores de venturia inaequalis, le champignon responsable de la tavelure du pommier. deux souches sont utilisées : une souche résistante aux fongicides de type triazoles comparativement à une souche sensible. les 7 huiles essentielles et 2 fongicides de références de type metconazole et sulfate de cuivre (cuso4) sont testés sur les 2 souches. les expériences sont réalisées en milieu liquide en microplaques et la gamme de concentrations employée permet de calculer les ci50 pour chaque modalité grâce à l’aide d’une régression non linéaire. les expérimentations sont réalisées au moins trois fois de manière indépendantes et permettent de réaliser des tests statistiques de type anova. parmi les 7 huiles essentielles, les résultats montrent sur les 2 souches que certaines sont plus efficaces que d’autres. les résultats montrent aussi que la souche résistante metconazole est beaucoup plus sensible au cuivre que ne l’est la souche sensible. de même, la souche résistante semble parfois plus sensible aux huiles essentielles que la souche sensible. si le metconazole reste la molécule fongicide la plus efficace sur les 2 souches, les huiles essentielles sont aussi ou plus efficaces que le cuivre sur la souche sensible. ces résultats tendent à démontrer au laboratoire que le comportement des souches r et s triazoles est différent non seulement par rapport au cuivre mais aussi par rapport aux huiles essentielles. les tests aux vergers devront montrer l’intérêt des huiles essentielles dans des modes de production biologique (comparativement au cuivre) et des modes de production plus conventionnelle |
2015Conférence ER4 Auteurs : Muchembled, Jérôme; Deweer, Caroline; Sahmer, Karin; Halama, Patrice In vitro evaluation of 7 essential oils efficacy on Phytophthora infestans XVIII. International Plant Protection Congress, 24–27 August 2015, Berlin (Allemagne), 2015, (AFF). @conference{Muchembled2015c,
title = {In vitro evaluation of 7 essential oils efficacy on Phytophthora infestans},
author = {Jérôme Muchembled and Caroline Deweer and Karin Sahmer and Patrice Halama},
year = {2015},
date = {2015-01-01},
booktitle = {XVIII. International Plant Protection Congress, 24–27 August 2015, Berlin (Allemagne)},
note = {AFF},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
|
2015Conférence ER4 Auteurs : Muchembled, Jérôme; Deweer, Caroline; Sahmer, Karin; Halama, Patrice Laboratory evaluation of the effectiveness of botanical substances on Phytophthora Infestans XVIII. International Plant Protection Congress, 24–27 August 2015, Berlin (Allemagne), 2015, (AFF). Résumé @conference{Muchembled2015d,
title = {Laboratory evaluation of the effectiveness of botanical substances on Phytophthora Infestans},
author = {Jérôme Muchembled and Caroline Deweer and Karin Sahmer and Patrice Halama},
year = {2015},
date = {2015-01-01},
booktitle = {XVIII. International Plant Protection Congress, 24–27 August 2015, Berlin (Allemagne)},
abstract = {Potato late blight of is one of the most devastating diseases in the world with significant losses in yield and tuber quality declines. the use of pesticides is still the most common way to manage the disease in fields. however, the use of chemical fungicides in conventional agriculture or minerals fungicides in organic farming can cause environmental problems. as part of a prospective approach to the development of biocontrol and especially the use of natural plant substances in plant protection, we study here the efficacy of essential oils on phytophthora infestans. we test the efficacy of 7 essential oils on zoospores in a liquid medium (microplates) in accordance with a range of concentrations. essential oils were purchased from specialist suppliers: they are pure and chemotyped. essential oils are compared to fungicides active substances such as chlorothalonil, fluazinam and copper sulfate. the experiments are carried out at least three times in independent way. the fungicidal effectiveness is modeled by the calculation of the IC50. the IC50 values of the tested products are compared by an f-test within a nonlinear regression approach. the results show that the IC50 fungicides are lower than the IC50 essential oils. among the chemical fungicides, fluazinam is more effective than chlorothalonil. as a fungicide mineral, copper sulfate is less effective than chemical fungicides. if all essential oils have good fungicidal activity in vitro, 3 are statistically more effective than others. as natural substances, essential oils are less effective than the chemical fungicides. they are also less effective than the copper sulfate even if some of them approach the effectiveness of the mineral substance. the results of this innovative screening of essential oils in the laboratory is part of a larger research program carried by the technical institute of organic agriculture and co-funded by the ministry of agriculture ("evaluation of the interest of using essential oils in crop protection”; 2013-2015).},
note = {AFF},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
Potato late blight of is one of the most devastating diseases in the world with significant losses in yield and tuber quality declines. the use of pesticides is still the most common way to manage the disease in fields. however, the use of chemical fungicides in conventional agriculture or minerals fungicides in organic farming can cause environmental problems. as part of a prospective approach to the development of biocontrol and especially the use of natural plant substances in plant protection, we study here the efficacy of essential oils on phytophthora infestans. we test the efficacy of 7 essential oils on zoospores in a liquid medium (microplates) in accordance with a range of concentrations. essential oils were purchased from specialist suppliers: they are pure and chemotyped. essential oils are compared to fungicides active substances such as chlorothalonil, fluazinam and copper sulfate. the experiments are carried out at least three times in independent way. the fungicidal effectiveness is modeled by the calculation of the IC50. the IC50 values of the tested products are compared by an f-test within a nonlinear regression approach. the results show that the IC50 fungicides are lower than the IC50 essential oils. among the chemical fungicides, fluazinam is more effective than chlorothalonil. as a fungicide mineral, copper sulfate is less effective than chemical fungicides. if all essential oils have good fungicidal activity in vitro, 3 are statistically more effective than others. as natural substances, essential oils are less effective than the chemical fungicides. they are also less effective than the copper sulfate even if some of them approach the effectiveness of the mineral substance. the results of this innovative screening of essential oils in the laboratory is part of a larger research program carried by the technical institute of organic agriculture and co-funded by the ministry of agriculture ("evaluation of the interest of using essential oils in crop protection”; 2013-2015). |
2015Conférence ER4 Auteurs : Deparis, Coralie; Alary, Claire; Gauthier, Arnaud; Madé, Benoit Arsenic (V) and chromium (VI) removal from aqueous solution by adsorption on natural clay-rich rock 25th Goldschmidt Conference, 16–21 August 2015, Prague (Czech Republic), 2015, (ACTI). Résumé @conference{Deparis2015,
title = {Arsenic (V) and chromium (VI) removal from aqueous solution by adsorption on natural clay-rich rock},
author = {Coralie Deparis and Claire Alary and Arnaud Gauthier and Benoit Madé},
year = {2015},
date = {2015-01-01},
booktitle = {25th Goldschmidt Conference, 16–21 August 2015, Prague (Czech Republic)},
abstract = {A geological disposal in Gault clay (France) is planned for low activity,
long-lived nuclear waste. Storage in a undergroung shallow site should
ensure both radioactive and hazardous chemical elements sequestration.
This study focused on As(V) and Cr(VI) retention on the Gault Clay
under different environmental storage conditions. A serie of batch
sorption tests were performed under oxic/anoxic conditions with various
composition of aqueous solutions. Experimental results were used
to develop and calibrate a surface complexation model using CHESS™
and to improve our understanding of processes adsorption. Clay rock
sample caracterisation by XRD reveals a wide variety of minerals
as well as Quartz, Kaolinite, Illite, Goetite. Batchs results show
a high removal of As (77% in oxic conditions and 83% in anoxic conditions)
and the geochemical model suggest that sorption on iron oxides (Goetite)
is the principal process of As sequestration. The chemical environment
have an impact on As removal, especially in the presence of phosphates
which compete with As for iron oxides sorption sites. Low Cr removal
is observed in oxic conditions (9%) but the percentage rises to 47%
in anoxic ones. Sorption is a minor process and removal of Cr in
anoxic conditions can be explained by the reduction of hexavalent
chromium and precipitation of trivalent chromium (Cr2O3, MgCr2O4…).
Reduction of Cr(VI) is also very sensitive to acid pH. Thus the removal
of Cr at pH 4 in oxic conditions is close to 90 %. This research
revealed As and Cr behaviour in natural Gault clay sample, processes
of removal from garbage leachate and significance of chemistry environment
and thermodynamics conditions. Columns tests and simulations with
HYTECTM will be mained to understanding the transport mechanisms
of this pollutants.},
note = {ACTI},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
A geological disposal in Gault clay (France) is planned for low activity,
long-lived nuclear waste. Storage in a undergroung shallow site should
ensure both radioactive and hazardous chemical elements sequestration.
This study focused on As(V) and Cr(VI) retention on the Gault Clay
under different environmental storage conditions. A serie of batch
sorption tests were performed under oxic/anoxic conditions with various
composition of aqueous solutions. Experimental results were used
to develop and calibrate a surface complexation model using CHESS™
and to improve our understanding of processes adsorption. Clay rock
sample caracterisation by XRD reveals a wide variety of minerals
as well as Quartz, Kaolinite, Illite, Goetite. Batchs results show
a high removal of As (77% in oxic conditions and 83% in anoxic conditions)
and the geochemical model suggest that sorption on iron oxides (Goetite)
is the principal process of As sequestration. The chemical environment
have an impact on As removal, especially in the presence of phosphates
which compete with As for iron oxides sorption sites. Low Cr removal
is observed in oxic conditions (9%) but the percentage rises to 47%
in anoxic ones. Sorption is a minor process and removal of Cr in
anoxic conditions can be explained by the reduction of hexavalent
chromium and precipitation of trivalent chromium (Cr2O3, MgCr2O4…).
Reduction of Cr(VI) is also very sensitive to acid pH. Thus the removal
of Cr at pH 4 in oxic conditions is close to 90 %. This research
revealed As and Cr behaviour in natural Gault clay sample, processes
of removal from garbage leachate and significance of chemistry environment
and thermodynamics conditions. Columns tests and simulations with
HYTECTM will be mained to understanding the transport mechanisms
of this pollutants. |
2015Article de journal ER4 Auteurs : Waterlot, Christophe; Douay, Francis Arsenic mobility and speciation in contaminated kitchen garden and lawn soils: an evaluation of water for assessment of As phytoavailability Dans: Environmental Science and Pollution Research, vol. 22, no. 8, p. 6164-6175, 2015, (ACL). Résumé @article{Waterlot2015b,
title = {Arsenic mobility and speciation in contaminated kitchen garden and lawn soils: an evaluation of water for assessment of As phytoavailability},
author = {Christophe Waterlot and Francis Douay},
year = {2015},
date = {2015-01-01},
journal = {Environmental Science and Pollution Research},
volume = {22},
number = {8},
pages = {6164-6175},
abstract = {Emissions from primary lead smelters have been recognized as one of the mainly factor which has contributed to the contamination of soils by metals. less attention has been paid to volatile metalloids such as arsenic (as) which accompanies lead (pb) smelting activities. one of the objectives of this study was to determine the as concentrations in various extracting solutions using a collection of urban soils located no far away from two former pb and zinc plants in the north of france. the procedure for the determination of as, asiii, and asv with hydride vapor generator atomic absorption spectrometry was described in details. pseudo-total concentrations of as in the studied soils ranged from 5.3 to 65.9 mg kg-1. good correlations were found between as and lead, zinc, and cadmium concentrations in soils. these depended on the soil uses and the soil distance from the source of contamination. because the form of as may pose a health risk to human population, its speciation was determined in each urban top soils. very good correlations were found between asiii and asv versus as concentrations in soils studied, but the results did no permit to establish a relation between the location of soils and their uses. in contrast, it was shown that the highest mobility factor and lowest partitioning index values were related to the location. the mobilty of as depended on the assimilated phosphorus (p), carbonate contents, and ph. the percentages of the water-extractable as concentrations ranged from 0.3 to 3.0 % of the as concentrations in soils. very good positive correlations between water-extractable asiii and asv versus water-extractable as concentrations were obtained. it was shown that the water-extractable asiii concentrations depended on the soil uses. the results revealed that soils for which the as was the most mobile presented the highest water-extractable as concentrations. principal component analysis indicated that mechanisms related to the release of as depended on the physico-chemical parameters of the soils, particularly on the assimilated p, organic matter, and/or iron oxides/hydroxides contents. finally, the glasshouse experiments using ryegrass as plant model and three soils with similar physico-chemical parameters with regard to the pca analysis showed that the water extracting solution could be a good indicator to evaluate the as phytoavailability},
note = {ACL},
keywords = {ER4},
pubstate = {published},
tppubtype = {article}
}
Emissions from primary lead smelters have been recognized as one of the mainly factor which has contributed to the contamination of soils by metals. less attention has been paid to volatile metalloids such as arsenic (as) which accompanies lead (pb) smelting activities. one of the objectives of this study was to determine the as concentrations in various extracting solutions using a collection of urban soils located no far away from two former pb and zinc plants in the north of france. the procedure for the determination of as, asiii, and asv with hydride vapor generator atomic absorption spectrometry was described in details. pseudo-total concentrations of as in the studied soils ranged from 5.3 to 65.9 mg kg-1. good correlations were found between as and lead, zinc, and cadmium concentrations in soils. these depended on the soil uses and the soil distance from the source of contamination. because the form of as may pose a health risk to human population, its speciation was determined in each urban top soils. very good correlations were found between asiii and asv versus as concentrations in soils studied, but the results did no permit to establish a relation between the location of soils and their uses. in contrast, it was shown that the highest mobility factor and lowest partitioning index values were related to the location. the mobilty of as depended on the assimilated phosphorus (p), carbonate contents, and ph. the percentages of the water-extractable as concentrations ranged from 0.3 to 3.0 % of the as concentrations in soils. very good positive correlations between water-extractable asiii and asv versus water-extractable as concentrations were obtained. it was shown that the water-extractable asiii concentrations depended on the soil uses. the results revealed that soils for which the as was the most mobile presented the highest water-extractable as concentrations. principal component analysis indicated that mechanisms related to the release of as depended on the physico-chemical parameters of the soils, particularly on the assimilated p, organic matter, and/or iron oxides/hydroxides contents. finally, the glasshouse experiments using ryegrass as plant model and three soils with similar physico-chemical parameters with regard to the pca analysis showed that the water extracting solution could be a good indicator to evaluate the as phytoavailability |
2015Article de journal ER5 Auteurs : Essabbani, Tahar; Moufekkir, Fayçal; Mezrhab, Ahamed; Naji, Hassane Numerical computation of thermal performance of a simulation of a solar domestic hot water system Dans: Applied Solar Energy, vol. 51, no. 1, p. 22-33, 2015, (ACL). Liens @article{Essabbani2015,
title = {Numerical computation of thermal performance of a simulation of a solar domestic hot water system},
author = {Tahar Essabbani and Fayçal Moufekkir and Ahamed Mezrhab and Hassane Naji},
doi = {https://doi.org/10.3103/S0003701X15010089},
year = {2015},
date = {2015-01-01},
journal = {Applied Solar Energy},
volume = {51},
number = {1},
pages = {22-33},
note = {ACL},
keywords = {ER5},
pubstate = {published},
tppubtype = {article}
}
|
2015Article de journal ER4 Auteurs : Dessert, Céline; Lajeunesse, Eric; Lloret, Emily; Clergue, Clémentine; Crispi, Olivier; Gorge, Caroline; Quidelleur, Xavier Controls on chemical weathering on a mountainous volcanic tropical island: Guadeloupe (French West Indies) Dans: Geochimica et Cosmochimica Acta, vol. 171, p. 216-237, 2015, (ACL). Résumé @article{Dessert2015,
title = {Controls on chemical weathering on a mountainous volcanic tropical island: Guadeloupe (French West Indies)},
author = {Céline Dessert and Eric Lajeunesse and Emily Lloret and Clémentine Clergue and Olivier Crispi and Caroline Gorge and Xavier Quidelleur},
year = {2015},
date = {2015-01-01},
journal = {Geochimica et Cosmochimica Acta},
volume = {171},
pages = {216-237},
abstract = {Guadeloupe Island is a natural laboratory, ideally suited to the study
of biogeochemical processes in tropical and mountainous volcanic
environments. The island’s east–west rainfall gradient (1200–8000
mm/yr) is superimposed on a north–south age gradient (2.7 Ma to present),
providing a unique opportunity to investigate the influence of rainfall
and rock age on the chemical weathering of volcanic terrains. Taking
advantage of this configuration, we present the first temporal survey
(2007–2013) of the geochemical composition of the dissolved load
of rain and river waters in Guadeloupe.
Our data demonstrate that the chemical composition of river water
is influenced by rainfall abundance, hydrothermal alteration (from
active or fossilized volcanic systems) and interactions between water
and minerals during chemical weathering processes. The contribution
of rain to the overall chemical balance is especially significant
in the older northern part of the island, where the ferralitic soils
are base-cation-depleted. Between 15% and 65% of the Ca or Mg riverine
budgets comes from atmospheric deposits, highlighting the major role
of rainfall in the geochemical budgets of small tropical and mountainous
watersheds. The river water dataset indicates that different chemical
weathering processes dominate the budget depending on the age of
the local bedrock. In the younger, southern part of the island, a
pool of easily-weatherable andesitic minerals from the bedrock dominates.
The contribution from this pool decreases significantly (to 5–15
wt.% of the bulk soil) towards the older terrains in the north. The
northern rivers are characterized by low Ca/Mg ratios (0.5–1.0),
intermediate between those of fresh rocks (1.7–3.3) and soil (0.1).
Weathering in the northern part of the island is therefore dominated
by the dissolution of depleted secondary minerals into soils. The
Ca/Mg ratio of the river water increases from north to south, eventually
reaching values similar to those of the bedrocks, arguing for congruent
dissolution of the youngest volcanic rocks.
The magnesium isotopic composition of river water (δ26Mg) reflects
inputs from both rain and weathering processes. In southern and central
rivers, the Mg isotopic value of waters after correction for rain
inputs (δ26Mgwea) is systematically depleted in heavy isotopes (mean
value of −0.34‰) relative to that of the bedrock (−0.24‰ to −0.15‰).
In the north, the δ26Mgwea of the river water (−0.09‰) is heavier
than that of the andesitic bedrock, possibly reflecting the dissolution
of 26Mg-rich secondary minerals (ferralitic soil measured around
+0.13‰). The robustness of δ26Mg and Ca/Mg as proxies of the degree
of soil weathering should be investigated further via more detailed
sampling campaigns in the future.
By combining high-frequency monitoring of river discharge with measurements
of concentration–discharge relationships for a wide range of chemical
elements, we estimate the mean annual chemical weathering fluxes
for three rivers that belong to the OBSERA critical zone observatory.
Fluxes vary from 51.7 to 91.8 t/km2/yr north to south along the bedrock
age gradient, and are among the highest recorded in volcanic tropical
regions. Flash floods can explain 21–31% of the annual chemical weathering
fluxes. The results highlight the importance of monitoring rivers
over periods of several years in order to obtain accurate estimates
of chemical exports in tropical and mountainous environments.},
note = {ACL},
keywords = {ER4},
pubstate = {published},
tppubtype = {article}
}
Guadeloupe Island is a natural laboratory, ideally suited to the study
of biogeochemical processes in tropical and mountainous volcanic
environments. The island’s east–west rainfall gradient (1200–8000
mm/yr) is superimposed on a north–south age gradient (2.7 Ma to present),
providing a unique opportunity to investigate the influence of rainfall
and rock age on the chemical weathering of volcanic terrains. Taking
advantage of this configuration, we present the first temporal survey
(2007–2013) of the geochemical composition of the dissolved load
of rain and river waters in Guadeloupe.
Our data demonstrate that the chemical composition of river water
is influenced by rainfall abundance, hydrothermal alteration (from
active or fossilized volcanic systems) and interactions between water
and minerals during chemical weathering processes. The contribution
of rain to the overall chemical balance is especially significant
in the older northern part of the island, where the ferralitic soils
are base-cation-depleted. Between 15% and 65% of the Ca or Mg riverine
budgets comes from atmospheric deposits, highlighting the major role
of rainfall in the geochemical budgets of small tropical and mountainous
watersheds. The river water dataset indicates that different chemical
weathering processes dominate the budget depending on the age of
the local bedrock. In the younger, southern part of the island, a
pool of easily-weatherable andesitic minerals from the bedrock dominates.
The contribution from this pool decreases significantly (to 5–15
wt.% of the bulk soil) towards the older terrains in the north. The
northern rivers are characterized by low Ca/Mg ratios (0.5–1.0),
intermediate between those of fresh rocks (1.7–3.3) and soil (0.1).
Weathering in the northern part of the island is therefore dominated
by the dissolution of depleted secondary minerals into soils. The
Ca/Mg ratio of the river water increases from north to south, eventually
reaching values similar to those of the bedrocks, arguing for congruent
dissolution of the youngest volcanic rocks.
The magnesium isotopic composition of river water (δ26Mg) reflects
inputs from both rain and weathering processes. In southern and central
rivers, the Mg isotopic value of waters after correction for rain
inputs (δ26Mgwea) is systematically depleted in heavy isotopes (mean
value of −0.34‰) relative to that of the bedrock (−0.24‰ to −0.15‰).
In the north, the δ26Mgwea of the river water (−0.09‰) is heavier
than that of the andesitic bedrock, possibly reflecting the dissolution
of 26Mg-rich secondary minerals (ferralitic soil measured around
+0.13‰). The robustness of δ26Mg and Ca/Mg as proxies of the degree
of soil weathering should be investigated further via more detailed
sampling campaigns in the future.
By combining high-frequency monitoring of river discharge with measurements
of concentration–discharge relationships for a wide range of chemical
elements, we estimate the mean annual chemical weathering fluxes
for three rivers that belong to the OBSERA critical zone observatory.
Fluxes vary from 51.7 to 91.8 t/km2/yr north to south along the bedrock
age gradient, and are among the highest recorded in volcanic tropical
regions. Flash floods can explain 21–31% of the annual chemical weathering
fluxes. The results highlight the importance of monitoring rivers
over periods of several years in order to obtain accurate estimates
of chemical exports in tropical and mountainous environments. |
2015Article de journal ER5 Auteurs : Khelil, Ali; Naji, Hassane; Braikia, Mohamed; Loukarfi, Larbi Comparative Investigation on Heated Swirling Jets Using Experimental and Numerical Computations Dans: Heat Transfer Engineering, vol. 36, no. 1, p. 43-57, 2015, (ACL). Résumé | Liens @article{Khelil2015,
title = {Comparative Investigation on Heated Swirling Jets Using Experimental and Numerical Computations},
author = {Ali Khelil and Hassane Naji and Mohamed Braikia and Larbi Loukarfi},
doi = {http://dx.doi.org/10.1080/01457632.2014.906279},
year = {2015},
date = {2015-01-01},
journal = {Heat Transfer Engineering},
volume = {36},
number = {1},
pages = {43-57},
abstract = {The purpose of this paper is to investigate both experimentally and numerically the influence of various parameters on the different blowing configurations of multiple swirling jets. Flow rate was adjusted at Reynolds numbers ranging from 104 to 3 × 104. The current study is carried out under uniform heat flux condition for each diffuser, at Reynolds number of 3 × 104, with air being the working fluid. Experiments concerning the fusion of several jets show that the resulting jet is clearly more homogenized under swirling influence. Afterward, numerical simulation is also carried out using the finite-volume computational fluid dynamics solver FLUENT 6.3, in which the standard k − ϵ and the Reynolds stress turbulence model (RSM) were used for turbulence computations. The findings of this study show that the diffuser vane angle and a balance and an imbalance in temperature between the central and peripheral jets affect the quality of the thermal homogenization of the ambiance. Overall predictions obtained with the RSM model are in better agreement with the experimental data compared to those of the standard k − ϵ model.},
note = {ACL},
keywords = {ER5},
pubstate = {published},
tppubtype = {article}
}
The purpose of this paper is to investigate both experimentally and numerically the influence of various parameters on the different blowing configurations of multiple swirling jets. Flow rate was adjusted at Reynolds numbers ranging from 104 to 3 × 104. The current study is carried out under uniform heat flux condition for each diffuser, at Reynolds number of 3 × 104, with air being the working fluid. Experiments concerning the fusion of several jets show that the resulting jet is clearly more homogenized under swirling influence. Afterward, numerical simulation is also carried out using the finite-volume computational fluid dynamics solver FLUENT 6.3, in which the standard k − ϵ and the Reynolds stress turbulence model (RSM) were used for turbulence computations. The findings of this study show that the diffuser vane angle and a balance and an imbalance in temperature between the central and peripheral jets affect the quality of the thermal homogenization of the ambiance. Overall predictions obtained with the RSM model are in better agreement with the experimental data compared to those of the standard k − ϵ model. |
2015Conférence ER4 Auteurs : N'diaye, Ismaïla; Essaifi, Abderrahim; Dubois, Michel; Lacroix, Brice; Goodenough, Kathryn-M.; Boyce, Adrian Implication of mineral geochemistry and stable isotopes in the Kettara pyrrhotite-rich Massive Sulphide deposit (Central Jebilet, Hercynian, Morocco) 13th SGA Biennal Meeting, 24-27 août 2015, Nancy, 2015, (ACTI). Résumé @conference{Ndiaye2015,
title = {Implication of mineral geochemistry and stable isotopes in the Kettara pyrrhotite-rich Massive Sulphide deposit (Central Jebilet, Hercynian, Morocco)},
author = {Ismaïla N'diaye and Abderrahim Essaifi and Michel Dubois and Brice Lacroix and Kathryn-M. Goodenough and Adrian Boyce},
year = {2015},
date = {2015-01-01},
booktitle = {13th SGA Biennal Meeting, 24-27 août 2015, Nancy},
abstract = {The kettara deposit consists of a sub-vertical pyrrhotite-rich massive sulphide hosted by sedimentary rocks, located in centre of the variscan jebilet massif, north of marrakech, morocco. the host rocks are deformed and weekly metamorphosed to greenschist facies. they are composed of pelite, sandstone, and calcareous beds and cross cut by dolerite dikes. the sulphide ore are massive to semi-massive pyrrhotite with fragments of the host schists, brecciaed pyritic ore and mineralized veins. the mineralization is composed of two main paragenetic assemblages. the first is pyrrhotite-dominant with chalcopyrite, magnetite, sphalerite, arsenopyrite, galena and native bismuth, associated with quartz, chlorite ± talc and mica gangues. a second sequence consists of pyrite-dominant with marcasite and associated with fe-rich carbonate minerals. the second sequence was formed via replacement of the pyrrhotite-rich mineralization by carbonates. chlorites associated with mineralization are fe-rich, and chlorite geothermometry indicates they were formed at c. 350 °c. oxygen and hydrogen isotope indicate that these chlorites were formed from metamorphic fluid.},
note = {ACTI},
keywords = {ER4},
pubstate = {published},
tppubtype = {conference}
}
The kettara deposit consists of a sub-vertical pyrrhotite-rich massive sulphide hosted by sedimentary rocks, located in centre of the variscan jebilet massif, north of marrakech, morocco. the host rocks are deformed and weekly metamorphosed to greenschist facies. they are composed of pelite, sandstone, and calcareous beds and cross cut by dolerite dikes. the sulphide ore are massive to semi-massive pyrrhotite with fragments of the host schists, brecciaed pyritic ore and mineralized veins. the mineralization is composed of two main paragenetic assemblages. the first is pyrrhotite-dominant with chalcopyrite, magnetite, sphalerite, arsenopyrite, galena and native bismuth, associated with quartz, chlorite ± talc and mica gangues. a second sequence consists of pyrite-dominant with marcasite and associated with fe-rich carbonate minerals. the second sequence was formed via replacement of the pyrrhotite-rich mineralization by carbonates. chlorites associated with mineralization are fe-rich, and chlorite geothermometry indicates they were formed at c. 350 °c. oxygen and hydrogen isotope indicate that these chlorites were formed from metamorphic fluid. |
