Sphingolipid identification and skin barrier recovery capacity of a milk sphingolipid-enriched fraction (MSEF) from buttermilk powder / K. Lee in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 3 (06/2020)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 3 (06/2020) . - p. 270-276 Titre : Sphingolipid identification and skin barrier recovery capacity of a milk sphingolipid-enriched fraction (MSEF) from buttermilk powder Type de document : document électronique Auteurs : K. Lee, Auteur ; S. Kim, Auteur ; A. Kim, Auteur ; H. J. Suh, Auteur ; K.-B. Hong, Auteur Année de publication : 2020 Article en page(s) : p. 270-276 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Barrière cutanée Evaluation Hydratation Ingrédients cosmétiques Lait et constituants Peau -- Soins et hygiène Produits hydratants Sphingolipides Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : In this study, we isolated the milk sphingolipid-enriched fraction (MSEF) of sweet buttermilk powder and conducted a clinical trial for evaluating its efficacy in skin barrier recovery. - Methods : Milk sphingolipid-enriched fraction was isolated via solvent extraction of buttermilk powder, and further concentrated by removing the phospholipids and neutral lipids. A cream containing 1% MSEF was used during clinical trials to assess for water holding and skin barrier recovery capacities. - Results : The main components of the MSEF were sphingomyelin, glucosylceramide and lactosylceramide, confirmed by TLC, HPLC, MS and NMR. The MSEF cream-treated group had a significantly higher (P < 0.05) water holding capacity, compared with the base cream (vehicle) group. Compared with that in the base cream group, transepidermal water loss (TEWL) recovery increased in the presence of the sphingolipid-containing MSEF cream (MSEF group), with a significant difference (P < 0.05) recorded on day 14. - Conclusion : The MSEF cream contributed to improving the water holding capacity and skin barrier recovery of damaged skin. Therefore, sphingolipid-containing MSEF can be useful for strengthening or repairing skin barrier function. Note de contenu : - MATERIALS AND METHODS : Materials - Production of milk sphingolipid-enriched fraction - Clinical tests - Determination of three main MSEF sphingolipids - Preparation of 1% cream for clinical trial - Isolation of 3 main sphingolipid compounds - Study protocol - Skin assessments - Statistical analyses - RESULTS : Analyses of sphingolipids in MSEF - Clinical trials for evaluating the effect of MSEF cream on skin hydration and skin barrier function - Table 1 : Ingredients and composition of base cream and MSEF cream DOI : https://doi.org/10.1111/ics.12612 En ligne : https://drive.google.com/file/d/1UPg37Gy-xB7w93UVj_V2bWw3V3d7FZ7y/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35274 [article]

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The matching of experimental polymer processing flows to viscoelastic vumerical simulation / Jean-François Agassant in INTERNATIONAL POLYMER PROCESSING, Vol. XVII, N° 1 (03/2002)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XVII, N° 1 (03/2002) . - p. 3-10 Titre : The matching of experimental polymer processing flows to viscoelastic vumerical simulation Type de document : texte imprimé Auteurs : Jean-François Agassant, Auteur ; F. Baaijens, Auteur ; A. Bernnat, Auteur ; A. C. B. Bogaerds, Auteur ; T. Coupez, Auteur ; B. Debbaut, Auteur ; A. L. Gavrus, Auteur ; A. Goublomme, Auteur ; M. van Gurp, Auteur ; R. J. Koopmans, Auteur ; H. M. Laun, Auteur ; K. Lee, Auteur ; O. H. Nouatin, Auteur ; M. R. Mackley, Auteur ; G. W. M. Peters, Auteur ; G. Rekers, Auteur ; W. M. H. Verbeeten, Auteur ; Bruno Vergnes, Auteur ; M. H. Wagner, Auteur ; E. Wassner, Auteur ; W. F. Zoetelief, Auteur ; H. Bastian, Auteur Année de publication : 2002 Article en page(s) : p. 3-10 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : This paper describes work carried out in order to match experimental processing flows to numerical simulations. The work has brought together a consortium that has developed reliable experimental methods by which processing flows can be achieved in the laboratory and then ranked against numerical simulation. A full rheological characterisation of a selected range of polymers was made and the results compared from different laboratories. The data was fitted to a number of rheological models. Multi-mode parameter fitting was universal for the linear viscoelastic response. Particular attention was paid to the non linear response of the material. Prototype industrial flow experiments were carried out for a number of geometries in different laboratories and the flow birefringence technique was used to map out the experimentally observed stress fields for different polymers in a range of complex flows that contained both extensional and shear flow components. Numerical simulation was carried out using a number of algorithms and a range of constitutive equations. In order to make a quantitative comparison between experiment and simulation, an Advanced Rheological Tool (ART) module was developed that was able in some cases to quantify the level of fit between the numerically predicted and the experimentally observed stress patterns. In addition the ART module was able to optimise certain non-linear parameters in order to improve the quality of fit between experiment and simulation. Note de contenu : - Rheological characterisation and choice of constitutive equation - Prototype industrial flows (PIF) - Numerical simulation - The ART module - Conclusions and future perspectives DOI : 10.3139/217.1675 En ligne : https://drive.google.com/file/d/1-xYcLm5cmWTCdrcTRx-sugAgOaEiZqnR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15955 [article]

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