Academic literature on the topic 'Extraction végétale'
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Journal articles on the topic "Extraction végétale"
Koriko, Moursalou, Sanonka Tchegueni, Fouad Alassani, Koffi Agbegnigan Degbe, and Gado Tchangbedji. "Extraction Et Caractérisation Physico-Chimique D’un Sel Végétal À Partir De La Cendre Du Palmier À Huile Du Nord Du Togo." European Scientific Journal ESJ 17, no. 43 (December 31, 2021): 102–15. http://dx.doi.org/10.19044/esj.2021.v17n43p102.
Full textLAOUFI, Razika, Khaled BOUDJEMA, Samia LEFKIR, Narimen BENHABYLES, Ouahiba BOUCHENAK, and Karima YAHIAOUI. "Valorization and biological effect of Zizuphus jujuba Mill. vegetable oil." Nutrition & Santé 12, no. 01 (June 30, 2023): 38–47. http://dx.doi.org/10.30952/ns.12.1.5.
Full textMpika, Joseph, Armani Bakala Gambou, Josiane Nelly Niebi Awah-Lekaka, and Attibayeba. "Formulation en cristaux du sel extrait des résidus végétaux à faible valeur commerciale au Congo." International Journal of Biological and Chemical Sciences 18, no. 2 (July 26, 2024): 451–62. http://dx.doi.org/10.4314/ijbcs.v18i2.11.
Full textRatovonjanahary, Fitia Rotsirotsy Elsa, Zo Zafitsara Andrinirina, Soloharimino Mireille Rakotondravelo, Yves Tokiniaina Rabetokotany, and Fanomezantsoa Andriamparany Rakoto. "Particularités des corps étrangers laryngo-tracheo-bronchiques chez l’enfant : une série descriptive des cas du Centre Hospitalier de Soavinandriana, Madagascar." Annales Africaines de Medecine 17, no. 3 (June 28, 2024): e5646-e5651. http://dx.doi.org/10.4314/aamed.v17i3.6.
Full textMartel, A., E. Fevrier, S. Nahon, J. P. Grosse, and S. Baillif. "Extraction d’un volumineux corps étranger végétal intra orbitaire." Journal Français d'Ophtalmologie 42, no. 5 (May 2019): 531–33. http://dx.doi.org/10.1016/j.jfo.2018.12.007.
Full textBakkali Yakhlef, Salaheddine, Imane Guenoun, Benaîssa Kerdouh, Noureddine Hamamouch, and Mohamed Abourouh. "Efficient DNA isolation from moroccan arar tree [Tetraclinis articulata (Vahl) Masters] leaves and optimization of the rapd-pcr molecular technique. Extraction efficace de l’ADN des feuilles du thuya de berberie (Tetraclinis articulata (Vahl) masters) et optimisation de la technique moléculaire rapd-pcr." Acta Botanica Malacitana 35 (December 1, 2010): 97–106. http://dx.doi.org/10.24310/abm.v35i0.2863.
Full textVavasseur, Alain. "Bioremédiation des sols et des eaux : application aux pollutions chimique et nucléaire." Pollution atmosphérique, NS 7 (June 1, 2014): 80–86. http://dx.doi.org/10.54563/pollution-atmospherique.7832.
Full textBIAOU, Félix C. "Analyse économique des déterminants du choix des énergies de cuisson dans la commune d’Abomey-Calavi (Bénin)." Revue d’Economie Théorique et Appliquée 1, no. 2 (December 30, 2011): 53–72. https://doi.org/10.62519/reta.v1n2a5.
Full textMeinard, Yves, Gilles Thébaud, and Camille Roux. "Végétations et successions végétales dans les monts du Devès (Haute-Loire, France) : esquisse phytosociologique et symphytosociologique d’un secteur volcanique méconnu." BIOM - Revue scientifique pour la biodiversité du Massif central 3, no. 1 (December 14, 2022): 82–102. http://dx.doi.org/10.52497/biom.v3i1.318.
Full textHeninger, I., M. Potin-Gautier, M. Astruc, L. Galvez, and V. Vignier. "Mise au point de techniques analytiques pour la spéciation du sélénium dans les boues de stations d'épuration d'eaux résiduaires urbaines." Revue des sciences de l'eau 11, no. 3 (April 12, 2005): 333–46. http://dx.doi.org/10.7202/705310ar.
Full textDissertations / Theses on the topic "Extraction végétale"
Poirot, Rachel. "Méthodologie pour le passage en continu d'extraction de solute à partir de matière végétale." Phd thesis, Toulouse, INPT, 2007. http://oatao.univ-toulouse.fr/7664/1/poirot.pdf.
Full textKiriamiti, Kirimi Henry. "Extraction de pyréthrines par le CO2 liquide et supercritique." Toulouse, INPT, 2003. http://www.theses.fr/2003INPT013G.
Full textLi, Ying. "Les huiles végétales comme solvants alternatifs pour l’éco-extraction des produits naturels." Thesis, Avignon, 2014. http://www.theses.fr/2014AVIG0254.
Full textThe green extraction has arisen as a new trend in the valorisation of natural resources. As the growing concern on thesafety, health and environment, vegetable oils as alternative solvents have drawn great interests in the green extractionof bioactive compounds from nature plants. Apart from lipophilic carotenoids in this work., compounds with more polarproperties have been initially studied.Firstly, the solubility of major volatile aroma compounds in various vegetable oils was originally investigated through atheoretical modelling of their Hansen solubility parameters, followed by real experimental extractions for verification.Multivariate statistical analyses assisted to classify the solvent power of these oil solvents so as to select the optimal oil.Secondly, the revisit of polar paradox theory inspired us to achieve direct extraction of phenolic compounds usingvegetable oils as solvents. The appropriate addition of surfactants could significantly increase the extraction efficiency.The small angle X-ray scatting helped to further study the effect of surfactants on the supramolecular structure of thevegetable oils. Lastly, the extraction of carotenoids was intensified with the integration of ultrasounds and sunflower oilas the substitute to organic solvents, in which the optimized procedure has been compared with the conventional organicsolvent extraction in terms of procedures, kinetics, yields and environmental impacts
Sicaire, Anne-Gaëlle. "Solvants alternatifs et techniques innovantes pour l'éco-extraction des huiles végétales à partir de graines oléagineuses." Thesis, Avignon, 2016. http://www.theses.fr/2016AVIG0260.
Full textIn recent years, the growing interest in environmental considerations and process safety raises the issue of the use of non-renewable petrochemical harmful solvents such as hexane, but also the amount of energy invested in the process of oilseed crushing. The objective of this thesis has consisted in the research and development of green extraction processes of vegetable oil from oil seeds through innovative technologies (ultrasonic and microwave) and alternative solvents more respectful of health and environment. The first part of this manuscript describes the optimization with ultrasound of the extraction process, using hexane, of oil from rapeseed cake. Although ultrasound have a positive impact on extraction yield, extraction time and solvent consumption, the use of hexane remains questionable. In the second part, substituting hexane by "green" alternative solvents has been considered. A first experimental approach was supplemented by a predictive approach through the use of decision tools: Hansen solubility parameters and COSMO-RS model. This led to the selection of a solvent, 2-methyltetrahydrofuran, for conducting a comprehensive study from laboratory to pilot scale. In a third and final part, the combination of alternative solvents with an innovative technology, microwaves, for the extraction of oil from rapeseed cake was investigated. This study highlighted the benefit of microwaves in the case of a selective heating between biomass and solvent
Hernandez, Ochoa Leon Raul. "Substitution de solvants et matières actives de synthèse par un combiné «solvant/actif » d'origine végétale." Phd thesis, Toulouse, INPT, 2005. http://oatao.univ-toulouse.fr/7399/1/hernandez_ochoa.pdf.
Full textBen, Amor Bouthaina. "Maîtrise de l'aptitude technologique de la matière végétale dans les opérations d'extraction de principes actifs : texturation par détente instantanée contrôlée (DIC)." Phd thesis, Université de La Rochelle, 2008. http://tel.archives-ouvertes.fr/tel-00399131.
Full textLefebvre, Thibault. "Production d'extraits non colorés de plantes enrichis en composés bioactifs. Investigation des techniques d’extraction modernes (US, MO, SFE, PLE)." Thesis, Orléans, 2020. http://www.theses.fr/2020ORLE3062.
Full textIn the field of cosmetics, many raw materials are used and natural extracts from plants represent a large part of them. Plant extracts can have different activities: antioxidants, anti-aging ... However, their color mainly due to pigments can be an obstacle to their use because they can have stability problems. Their degradation results in a change of color which may be incompatible with their formulation.The objective of the thesis is to find selective conditions in order to extract compounds of interest without pigments (mainly chlorophylls).Initially, a study of the stability of chlorophylls allowed identification of extraction and storage conditions in order to identify and quantify native chlorophylls and their degradation products according to the different operating approaches. This made it possible to identify extraction and storage conditions limiting their degradation. Secondly, modeling was carried out, mainly by supercritical chromatography, to determine selective extraction conditions, with supercritical fluids, of antioxidant molecules (carnosic and rosmarinic acids) on the one hand and chlorophyll pigments on the other hand from rosemary, without the need for numerous extraction experiments. Finally, a sequential supercritical CO2 extraction using conditions determined by the previous model was developed. An online extraction/chromatography system was developed to support this development through extraction kinetics studies. This extraction allowed the realization of four fractions respectively rich in carotenoids, carnosic acid, rosmarinic acid and chlorophylls
El, khawand Toni. "Extraction et hémisynthèse de stilbènes de la vigne et du vin pour une application en santé humaine et végétale." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0402.
Full textStilbenes are a group of defence molecules produced by grapevine to fight against pathogens. They are consequently found in wine, where they acquire an added value through their proven positive effects on human health. Knowing that the efficacy of stilbenes against some oomycetes and fungus pathogens that attack grapevine increases with their oligomerization degree, the first objective of this thesis was to optimize and proceed to oxidative coupling reactions of resveratrol and ɛ-viniférine extracted from grapevine canes, in the presence of metal salts, in order to produce stilbene oligomers. On the one hand, these hemisynthesis reactions led to the formation of stilbenes with high molecular weight, and to the production of extracts with high antifungal activity against two major grapevine pathogens, Plasmopara viticola and Botrytis cinerea. On the other hand, these oxidative coupling reactions carried out on wine helped study the mechanisms of the oxidative transformation of resveratrol in wine, identify the resulting oligomers and determine the conditions conducive to their formation. Finally, the potential effects of these oligomers on human health were studied, by evaluating the level of their anti-inflammatory activity
Cablé, Pierre-Alann. "Étude de solvants à eutectique profond pour l'extraction de molécules à haute-valeur ajoutée issues de la biomasse ligno-cellulosique." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0298.
Full textLignocellulosic biomass (wood, wastes, algae etc.) is one of the most important renewable carbon sources. Its valorisation into fuels, chemicals and materials can lead to climate change mitigation. Nevertheless, scientific challenges remain unravelled for efficient biomass valorisation in biorefineries. A new family of sustainable solvent, deep eutectic solvents (DESs) are promising option for biorefineries development: 1) High-added value compounds extraction after thermochemical conversion (HydroThermal Liquefaction, HTL) 2) Ligno-cellulosic biomass pre-treatment (delignification process). This work shows the efficiency of DESs to extract phenolic compounds (PCs) from various media using liquid-liquid extraction. Quantum chemistry calculation show that PCs have a stronger affinity with DESs than water. These results agree well with experimental study while DESs allow to extract more than 80 % of PCs from model oil. Moreover, DESs show higher efficiency in comparison with ionic liquid(5 times) and similar efficiency than conventional solvents used in liquid-liquid extraction. Nevertheless, DES appear to be ineffective for the PCs extraction from liquid products of beechwood hydrothermal conversion. Nonetheless, the used of acid-DESs such as Choline chloride: oxalic acid for biomass pre-treatment seems to be a promising application. 50 %wt delignification yield has been obtained during beechwood pre-treatment. A selective cleavage of lignin and hemicelluloses without affecting cellulose and with ether linkages preservation. This successful separation allows the valorisation of each component of biomass
Vieytez, Maria. "Nouveaux actifs cosmétiques issus d'extraits végétaux : caractérisation phytochimique, propriétés physicochimiques et activités biologiques." Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ5068.
Full textThe trend towards natural products and the growing consumer demand for greater efficacy of skincare products have made developing new natural active ingredients a top priority for cosmetics manufacturers. This work, conducted in collaboration with Shiseido's Europe Innovation Center, the Unité de Catalyse et Chimie du Solide (UCCS) from Centrale Lille Institut, and the Institut de Chimie de Nice (ICN), focuses on the development of bioinspired active ingredients derived from French plants. A plant selection methodology was implemented taking into account compliance with international regulatory frameworks, local sourcing in France, and the innovation potential of each plant. From an initial list of 1,614 candidate plants, 19 were sourced and thoroughly studied, through extraction and analysis of their phytochemical profiles and in vitro biological activities. Chemical assays, such as DPPH, and enzymatic assays, such as anti-lipoxygenase, were used to assess the biological activities and accordingly the cosmetic potential of each extract. Two plants emerged as particularly distinctive and innovative due to their underexplored biological activities and/or unidentified compounds responsible for these effects. The impact of the extracts on the gene expression of normal human epidermal keratinocytes confirmed their cosmetic application potential. Additionally, physicochemical characterization techniques, such as surface tension measurement and antioxidant capacity assessment, enriched this study. Some of the bioactive compounds present in these two plants were detected and identified using various analytical and spectroscopic techniques, including HPLC, HPTLC, GC, and HRMS. Given its potential, the most promising plant among the two underwent an in-depth phytochemical study through guided fractionation, allowing for the isolation and identification of active compounds such as ellagitannins, flavonoids, and saponins. Finally, to establish a reliable and scalable production method for the root extract of this plant, a feasibility study was conducted in collaboration with Futura Gaia, utilizing a rotating geophonic system. The cultivation conditions were optimized based on bioinspiration principles, leading to a protocol that ensures local and repeatable sourcing of roots. This study notably resulted in an extract with an extraction yield twice as high, while maintaining the quality of the plant, with an unchanged phytochemical profile and biological activities compared to a horizontally cultivated control
Books on the topic "Extraction végétale"
Farid, Chémat, ed. Enhancing extraction processes in the food industry. Boca Raton: CRC Press, 2012.
Find full textBook chapters on the topic "Extraction végétale"
Galano, Lucie. "Les « terres lagunaires » : extraction et exploitation des végétaux du pourtour lagunaire du Bas-Languedoc oriental au Moyen Âge (xiie-xve siècle)." In Environnement et sociétés au Moyen Âge, 353–68. Paris: Éditions de la Sorbonne, 2024. http://dx.doi.org/10.4000/12lo7.
Full textReports on the topic "Extraction végétale"
Toutin, Th, and S. Amaral. Extraction du couvert végétal en forêt Brésilienne avec des images stéréoscopiques de RADARSAT (résumé étendu). Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2001. http://dx.doi.org/10.4095/219798.
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