Dissertations / Theses on the topic 'Actifs cosmétiques'
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Julien, Valérie. "Remplacement des actifs cosmétiques d'origine biologique." Paris 5, 1995. http://www.theses.fr/1995PA05P074.
Full textVieytez, 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
Chausson, Mickaël. "Développement de nouveaux systèmes dispersés pour la vectorisation de principes actifs à visées cosmétiques par polymérisation en miniémulsion." Thesis, Lyon 1, 2009. http://www.theses.fr/2009LYO10112.
Full textThe aim of this work is the encapsulation of active ingredients by vinyl acetate miniemulsion polymerization for cosmetic use. This process allows to obtain latexes with high solid content and containing high amount of active molecule. This work is divided into two parts: 1) nanoparticles formation by miniemulsion polymerization and incorporation of different active principles 2) determination of the nanoparticles morphology. At first, the process of radical miniemulsion polymerization in for vinyl acetate is optimized. The hydrophobe compound, which is essential for the miniemulsion stability, is ensured by the active principle itself. We obtained several stable latexes with different active molecules at three different temperatures: 277 °K, 293°K and 313°K during six months. In the second part of this work, we studied the internal morphology of nanoparticles. A predictive study, based on the surface and the interfacial tension measurements between the different compounds of miniemulsion has been undertaken, which indicates a partial engulfing of the active principle by the polymer. Although the observation of PVAc lattices by electronic microscopy may be questionable, these studies seem to confirm this trend. The change of the surfactant and the monomer addition during the reaction of polymerization can favour the formation of nanocapsules
Garros, Laurine. "Impact de conduites culturales innovantes sur la production de métabolites actifs pour la Cosmétique." Thesis, Orléans, 2021. http://www.theses.fr/2021ORLE3155.
Full textThe valuing of regional biodiversity richness and the implementation of a sustainable approach in the production of bioactives meets the needs of the cosmetic industry in a restrictive regulatory context. This project is part of an approach to promote the plant heritage and local industry of the Centre-Val de Loire region. As part of this project, 13 plants or their co-products from local biodiversity or of interest for the horticultural industry were selected and studied. In tubo tests were carried out on the extracts of these 13 plants in order to highlight potential anti-aging activities against enzymes such as tyrosinase, elastase and collagenase and/or antioxidants of interest for the cosmetic industry. The results of these tests allowed the selection of a model plant with different activities in order to assess the contribution to an elicitation on the increase of its activities. In this context, the realization of classic cultures in passive hydroponics or innovative in active hydroponics as well as in vitro callus with light elicitations thanks to LED lamp systems of blue, red or white color was carried out onburdock (Arctium lappa L.). Each organ of the elicited plant was separated and extracted with ultrasound. The characterization of the molecular fingerprint of each extract was achieved by liquid chromatography coupled with high resolution mass spectrometry (UHPLC-ESI-QTOF-HRMS/MS) in order to identify their content and molecular variability according to the organ and/or elicitation studied. At the same time, the influence of the elicitation on the activities of cosmetic interest, particularly anti-tyrosinase and anti-ROS activities, was evaluated
Desbrosses, Mickaël. "Contribution de la Spectrométrie de Masse d’Ions Secondaires à Temps de Vol au développement de textiles industriels fonctionnels impliquant des agents actifs cosmétiques." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1117.
Full textTime-of-Flight Secondary Ion Mass spectrometry (ToF-SIMS) allows the characterization of the outermost surface with high sensitivity by mass detection of atomic and molecular secondary ions. The objective of this work was to study its application in the context of the analysis of industrial textiles on which dermatological properties are given (cosmetotextiles). Three analytical approaches based on the specific properties of the active agents and technologies are presented. They required peculiar developments of methods (preliminary study, calibration, data processing and interpretation ...) and to consider the possibilities and limitations of the technique or the equipment in the particular context of these textile fibers analysis (topography, localized charge effect, contamination, complex formulations, segregation and concentration of some components from the treatments at the outermost surface ...).In the first approach, ToF-SIMS chemical mapping was used to successfully illustrate an active agent concentration gradient close to the outermost surface of polyamide matrices. The ability to identify the characteristic signatures of active agents and to validate their presence at the surface of textile samples was confirmed in most cases. However, signatures different from those from the active agent were needed to validate the treatment in the case of textiles treated by co-precipitation. Finally, a gentle sputtering protocol was tested to address the particular issue of industrial textiles covered with silicone based textile finishing
Gannesen, Andrei. "Structure et composition de biofilms mono- et multispécies de bactéries cutanées et environnementales : effets des cosmétiques et de certains autres composés biologiquement actifs." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR068/document.
Full textRésumé en anglais non fourni
Morvan, Julien. "Développements de méthodes chromatographiques pour l’analyse de tensio-actifs anioniques : applications à des matrices cosmétiques. Elaboration de colonnes capillaires pour la chromatographie ionique." Rouen, 2007. http://www.theses.fr/2007ROUES053.
Full textThe first part of this study deals with surfactants analysis. In the first hand, a direct method has been performed using ion chromatography with a conductimetric detection allowing quantification of surfactants in raw materials. Analytical conditions using columns dedicated to surfactants analyses have optimized in order to achieve ethoxymers separation. In the other hand, a method of derivatization for anionic surfactants, allowing HPLC-UV analyses, has been optimized. The great sensitivity permitted fatty alcohols quantification in raw materials. The second part concerns capillary column packing for ion chromatography. The packing conditions have been chosen after a physico-chemical characterization of the stationary phase. A comparison with commercial column with conventional dimensions allowed the evaluation of the column packing
Miloudi, Lynda. "Application des techniques spectroscopiques vibrationnelles couplées aux analyses statistiques multivariées pour la caractérisation et l'objectivation des produits de soins comestiques." Thesis, Tours, 2018. http://www.theses.fr/2018TOUR3801/document.
Full textThe barrier function of the skin, which protects the body against exogenous molecules, limits the penetration of active cosmetic ingredients (ACI), thus reduce the effectiveness of molecules with a deep cellular target. Therefore, it appeared crucial to optimize the administration of existing active cosmetic in order to get the full benefits expected. Some innovations are explored to bypass this issue, including the encapsulation of existing active cosmetic in nanocarriers. In parallel, it is important to also focus on the development of analytical methodologies that could provide qualitative and quantitative information, in particular the determination of ACI contents and potentially excipients incorporated in a final form, and biological evaluation at different stages of formulation
Delannay, Eldra. "Valorisation de l'huile de gluten de blé comme actif anti-âge en dermacosmétologie." Reims, 2005. http://www.theses.fr/2005REIMP207.
Full text@This work concerns non-food valorisation of Champagne-Ardenne agricultural resources in the field of dermo-cosmetic applications. Wheat gluten, used as starting material, contains glycérides – the molecules of interest – that have shown inhibiting effect on MMP-1 and MMP-3 (neutral proteinases implied in cutaneous ageing). The fractionation process strategy is mainly based on liquide/liquide partition in order to avoid artefact generation or degradation of the analytes often encountered with adsorption phenomena on solid support. The extraction process leading to an enriched glycoglycerolipid extract (solide liquide and liquide/liquid steps) was designed under industrial constraints in order to allow scale-up procedures. This extract was then fractionated using partition chromatographic techniques as Centrifugal Partition Chromatography (CPC), in order to establish structure-activity relationships. Pure isolated compounds were submitted to structural elucidation techniques (NMR, mass ,…). Moreover, this approach leads us to develop a simple CPC chemical screening methodology integrating selectivity and polarity criterions. Finally, we developed a semi-continuous chromatographic mode in CPC (multiple dual mode: MDM), in order to resolved co-elution problems often encountered with structurally similar molecular analytes like homologues natural compounds
Magimel, Alice. "Etude du fractionnement de graines entières oléo-protéagineuses pour l'obtention de fractions multifonctionnelles de type "émulsions actives" dans le domaine de la formulation cosmétique." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0097.
Full textThis PhD work studies the fractionation of selected regional plants in order to produce multifunctional "active emulsions"type fractions , for cosmetic purposes . This process allows the direct substitution of synthetic ingredients (SDS, lauryl sulfate, glycol ether, PEG ... ) and the development of cosmetic formulations in 100% vegetal plant totum, therefore maintaining the expected biological activities and organic qualifying properties. The choice of raw materials was directed to oilseeds. Not only are oilseed seeds renewable and readily available resources, both from conventional agriculture as well as organic farming, but they also have very different compositions. Hemp, rapeseed, cardoon, woad and flax were chosen because of their complementarity in terms of fatty acid and protein composition. Indeed, physico-chemical and functional characterization related to their protein fraction,have yielded fundamental data for the development and understanding of extraction processes involved in this work. The aqueous fractionation of seeds was studied in a stirred batch reactor and then extended to a continuous fractionation process : twin screw extrusion. This method has been more widely explored. The aqueous fractionation in thermomechano- chemical (TMC) reactor of whole oilseed seeds, one variety at a time and then mixed was implemented first. Then an active natural polysaccharide was introduced in situ through the extracting aqueous phase in order to produce enriched fractions in molecules of interest and to increase the stabilization of the emulsions thus obtained. The best results in terms of yield and quality of emulsions were obtained with the whole rapeseed and the mixture of whole hemp / rapeseed. The different types of emulsions obtained by the TMC process and their behavior under different parameters were characterized by optical microscopy but also through innovative methods such as DSC or NMR low fields. The first valuation tests of formulation in emulsions for cosmetics have been developed
Michelet, Alexandre. "Recherche de nouveaux actifs d'origine microalgale d'intérêt en dermocosmétique : antiacnéens et conservateurs potentiels." Thesis, Clermont-Ferrand 2, 2011. http://www.theses.fr/2011CLF22119/document.
Full textMicroalgae are well-known to produce many bioactive molecules which are used more and more in both pharmaceutical and agroalimentary companies. The aim of my PhD project was to discover antimicrobial activitiesof natural origin which may be used in cosmetic in particular as preservatives and antiacne. Culture media in stationary phase of growth of a 113 microalgae collection, cultivated in the laboratory, were harvested. The presence of antibacterial and / or antifungal activities was evaluated on different microorganisms. This screening allowed to isolate 5 microalgae secreting molecules inhibiting the growth of bacteria belonging to Salmonella, Staphylococcus and Propionibacterium genera. Then my work concerned the S555 microalgae which show a total inhibiton activity of the growth on 3 Gram + bacteria : S. aureus, S. epidermis and P. acnes, these 2 last species being involved in the acne disease. This microalgae was then cultivated in industrial condition in order to confirm these inhibitions. A widening of the action spectrum suggests that these activities are specific to Gram + bacteria. Moreover, the S555 active compound(s) present no cytotoxicity or irritability potential on fibroblasts in vitro,making them potentially usable in dermocosmetic. Lastly, a fractionation of the culture medium and biomass of S555 microalgae were performed to separate the active compound(s). Their characterization is currently in progress
Henry, Nathaly. "Conception de polymères à empreintes moléculaires pour l'extraction de principes actifs de produits naturels." Thesis, Orléans, 2012. http://www.theses.fr/2012ORLE2028/document.
Full textThe cosmetic industry uses plants as sources of natural active ingredients. The extraction of theseactive ingredients requires selective extraction method such as molecularly imprinted polymers (MIP)technique. This thesis describes the development of MIP for the selective extraction of glucosamine,fructosazine and 2,5-déoxyfructosazine.In the first part, three approaches were developed to extract glucosamine by MIP technique: thecovalent approach, semi-covalent and noncovalent. For each approach, the various parametersinvolved in the synthesis of the MIP were optimized. The best results were obtained with a MIPsynthesized with a non-covalent ionic approach based on the complexation of glucosamine by asulfonic acid. The MIP exhibits higher performance than commercial media and extractions fromplants were performed. The potential for industrialization of the MIP was validated during initial testson a larger scale.In the second part, the simultaneous extraction of fructosazine and 2,5-déoxyfructosazine wasperformed following the development of a MIP synthesized using a covalent approach based on theformation of boronic esters. An original synthesis method is exposed since the templates were formedin situ during the polymerization. The MIP obtained showed good selectivity for each compound andallowed to separate and purify fructosazine and 2,5-déoxyfructosazine from plant and food matrices.All these works were performed according to an eco-friendly approach based on the use of aqueoussolvents as solvents for polymerization and extraction
Lemoine, Clément. "Culture in vitro de plantes halophiles du littoral breton et orientation de leur métabolisme vers la production de principes actifs pour la nutrition et la cosmétique." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0113.
Full textHalophytes are salt tolerant or salt-resistant plants which undergo high stress in their natural habitat. As a consequence of environmental stresses, they produce a number of active defense molecules which display interesting biological activities because of their diverse actions or structures. For the present study, three halophytic species were selected from preliminary antioxidant screening. In collaboration with Salipouss SME, objectives of the work were (i) to optimize in vitro halophyte multiplication in order to produce biomass under greenhouse and (ii) to elicit particular metabolic pathways in order to improve extract activities. To attempt to isolate molecules with potentially valuable activities, the variety of compounds from these extracts is reduced by successive fractionations. In addition, NMR analyzes allow to obtain indications on the nature and on the structure of the active compounds. First results highlight the strong activities of the selected halophytes, making them promising candidates for industrial uses, especially in nutrition and cosmetics
Lemoine, Clément. "Culture in vitro de plantes halophiles du littoral breton et orientation de leur métabolisme vers la production de principes actifs pour la nutrition et la cosmétique." Electronic Thesis or Diss., Brest, 2018. http://theses-scd.univ-brest.fr/2018/These-2018-STT-Environnement-LEMOINE_Clement.pdf.
Full textHalophytes are salt tolerant or salt-resistant plants which undergo high stress in their natural habitat. As a consequence of environmental stresses, they produce a number of active defense molecules which display interesting biological activities because of their diverse actions or structures. For the present study, three halophytic species were selected from preliminary antioxidant screening. In collaboration with Salipouss SME, objectives of the work were (i) to optimize in vitro halophyte multiplication in order to produce biomass under greenhouse and (ii) to elicit particular metabolic pathways in order to improve extract activities. To attempt to isolate molecules with potentially valuable activities, the variety of compounds from these extracts is reduced by successive fractionations. In addition, NMR analyzes allow to obtain indications on the nature and on the structure of the active compounds. First results highlight the strong activities of the selected halophytes, making them promising candidates for industrial uses, especially in nutrition and cosmetics
Gagneaux, Marie-Hélène. "Analyse de l’activité et culture d’action des professionnels de la bioproduction de substances actives pharmacologiques, cosmétiques en système Plantes à Traire® pour la conception de formations sous l’hypothèse de l'enaction." Thesis, Paris, CNAM, 2015. http://www.theses.fr/2015CNAM0986.
Full textThe thesis, realised in France, is on the subject of the transfer of the biotechnology « Plant milking technology » “Plantes à Traire” (patented by the University of Lorraine – INPL – INRA – ENSAIA) from France towards Brazil by the International Programme of the Safeguard of Amazônia, Mata Atlântica and the Amerindians for Sustainable Development (PISAD). This scientific, non-governmental, non-profit–making organisation intervenes in the third sector: solidary and responsible economy. It unites an economical project with a social objective: a) the proposal of natural active principles, useful for medical research, and the innovation of industries in the pharmaceutical, nutraceutical and cosmetic sectors; b) the safeguard of the biodiversity of the forests of Amazônia and Mata Atlântica and the native Índios, who are experts in the matter (these techniques). This non-governmental organisation is the maître d'ouvrage and the maître d'oeuvre of the project “Herb'Içana©” realised in partnership with the Indian community “Índios Baniwa” of the state of Amazonas, government institutions, Brazilian and French centres of excellence for the equitable valorisation of the biodiversity and the Índios's traditional knowledge of medicinal plants, through green biotechnology, bioengineering and the bioprocess for production of extracts containing natural therapeutic and cosmetic active principles (Meyer, 2003, 2004,a et b 2005, 2007).In this context, the construction of training ad hoc courses is linked with the stakes of the implantation of these technical tools, the implementation of the plant milking technologies and biotechnologies, and the apprenticeship of the techniques and of the knowledge related to the bioproduction of highly purified pharmacological plant extracts by the Índios tribes. The research in training is undertaken according to an anthropological approach of human activity, considered as the expression of a coupling between an actor and his environment (Maturana & Varda 1987, Varela, Thompson & Roch, 1993; Theureau 1999, 2004, 2006, Durand 2006, 2008), for the conception of innovative tools favouring individual and collective apprenticeship and development, useful for various intervening participants (Brazilian and French technicians and scientists, Índios medicine-men, teachers in cross-cultural bilingual schools and instructors from indigenous organizations cooperating in an intercultural context of training. It is part of a long time span, and is a contribution to an anthropotechnological programme of human activity and conception of training under the hypothesis of enaction developed by Durand (2008).The objectives of the study conducted in situ of the French company Plant Advanced Technologies, holder of the world patent license for the plant milking technology are: the comprehension of the work, the organisation of the activities and the “culture in action” of the professionals engaged in the practices of research and development of natural active ingredients and their semi-industrial bioproduction.The results of the analysis presented in the thesis supports the conception of training accompanying the transfer of technologies realized by PISAD from 2015. The thesis opens new research perspectives on the relationship between the transfer of technologies and the “culture of action”, “mimetic fictional experiences” and the construction of knowledge between Scientist and Native people of Amazônia in the perspective of ergonomics and training
Delaporte, Adeline. "Smart active innοvative micrοcapsules (Caps4Skin) : release, interactiοn with cοsmetic systems, sensοry and efficacy prοperties οn skin." Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMLH26.
Full textAntioxidants play a key role in cosmetic formulations, whether to stabilize products or for their skin benefits. However, their incorporation remains a challenge due to their low solubility and sensitivity, which can lead to premature degradation of formulations and even pose risks to consumers. Encapsulation offers a promising solution to improve their solubility, stability, and enable controlled release. This thesis project aims to develop active and innovative microcapsules based on natural ingredients for cosmetic applications. Two main objectives were explored: developing reliable encapsulation methods and analyzing the behavior of microcapsules in natural cosmetic matrices, mainly emulsions. Two encapsulation techniques were studied: spray-drying for ascorbic acid encapsulation and complex coacervation for α-tocopherol. It was demonstrated that the biopolymer-active ratio during spray-drying significantly influences the morphology of the microcapsules, enhancing their encapsulation efficiency and the protection of the active ingredient under extreme storage conditions. Integrated into emulsions or gels, these microcapsules impacted the texture properties, particularly spreadability. Furthermore, the combination of fungal chitosan and gum Arabic through complex coacervation allowed the effective encapsulation of α-tocopherol, with improved stability, especially after the addition of tannic acid as a cross-linking agent. Finally, these stable and robust microcapsules had a notable impact on the structure, texture, and rheological properties of the formulations. The practical outcomes of this study are significant for various sectors, particularly the cosmetic industry. The development of stable and multifunctional microcapsules presents promising opportunities for the formulation of innovative products with enhanced textural properties, while ensuring effective protection of the encapsulated actives. This could enhance the stability and performance of products, thereby improving their durability and effectiveness
Latire, Thomas. "Effets des composants de la matrice organique issue de la coquille de trois mollusques bivalves (Pecten maximus, Mytilus edulis et Crassostrea gigas) sur le métabolisme de fibroblastes dermiques humains, in vitro. Applications potentielles dans le domaine de la dermo-cosmétique." Caen, 2013. http://www.theses.fr/2013CAEN2008.
Full textMollusc shells are composed of more than 95% of calcium carbonate and less than 5% of an organic matrix consisting partly of proteins, glycoproteins and polysaccharides. Previous studies have enabled to highlight biological activities of the shell matrice from bivalve molluscs such as Pinctada maxima or Patinopecten yessoensis on skin, especially on the expression of ECM components by fibroblasts. In this thesis, we were interested in the potential biological activities of shell matrix components from three reared bivalve molluscs: Pecten maximus, Mytilus edulis and Crassostrea gigas on human dermal fibroblasts in primary culture. As a first step, we have demonstrated that shell matrix components had different effects on the global metabolism of fibroblasts. We have shown that the shell matrix components from Pecten maximus stimulate the synthesis of types I and III collagens, as well as sulfated GAGs. This increased expression of type I collagen is mediated, in part, by the recruitment of transactivating factors (Sp1, Sp3 and hc-Krox) on the -112/-61 bp COL1A1 promoter region. On the contrary, shell extracts from Mytilus edulis and Crassostrea gigas promote catabolic pathway by decreasing the synthesis of type I collagen, and increasing the synthesis of MMP-1. Finally, additional work enabled to highlight that shell extracts from Pecten maximus and Mytilus edulis have only little effect on cell migration during wound repair process in vitro. Thus, our research has highlighted that the shell organic matrix from three bivalve molluscs, especially from Pecten maximus, has biological activities that may be interesting for dermo-cosmetic applications