Aller sur itechnet
Accueil
Résultat de la recherche
3 résultat(s) recherche sur le tag ''Densité'
Ajouter le résultat dans votre panier Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette rechercheClassification of sensitive skin and development of a treatment system appropriate for each group / Tomohiro Yokota in IFSCC MAGAZINE, Vol. 6, N° 4 (10-11-12/2003)
Titre : Classification of sensitive skin and development of a treatment system appropriate for each group Type de document : texte imprimé Auteurs : Tomohiro Yokota, Auteur ; Masayuki Matsumoto, Auteur ; Takeshi Sakamaki, Auteur ; Rie Hikima, Auteur ; Shoji Hayashi, Auteur ; Mayumi Yanagisawa, Auteur ; Hirofumi Kuwahara, Auteur ; Shyunsuke Yamazaki, Auteur ; Tomoyasu Ogawa, Auteur ; Motoi Hayase, Auteur Année de publication : 2003 Article en page(s) : p. 303-307 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Fonction barrière' Classification 'Etat d'hydratation' Hypersensibilité 'Peau sensible' 'Sensibilité aux stimuli électriques' 'Points cuisants' 'Densité des papilles cutanées' 'Modèle de desquamation' 'Facteur croissance du nerf' 'Perte d'eau transepidermique' 'Épaisseur l'épiderme' Index. décimale : 668.5 Parfums et cosmétiques Résumé : In order to find an effective approach to improve sensitive skin, it is important to know the detailed mechanism of sensitive skin. In this study, detailed characteristics of sensitive skin were investigated using non-invasive methods. Senssitive skin was classified into three different types based on their particular characteristics. Type I was defined as the low barrier function group. Type II was defined as the inflammation group with normal barrier function and inflammatory changes. Type III was specified as the pseudo healthy group in terms of normal barrier function and no inflammatory change. In all types, a high content of nerve growth factor was observed in the stratum corneum. Both in Type II and III, the sensitivity to electric stimuli was high. Moreover, a treatment system appropriate for type I was examined. Topical application of cosmetics containing niacinamide significantly improved Type I sensitive skin, while there was no effect observed in either Type II or III showing normal barrier function. These data suggest that sensitive skin could be classified into three groups each with particular characteristics and an appropriate approach should be taken to improve sensitive skin with consideration given to the underlying mechanism of skin sensitivity. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10553
in IFSCC MAGAZINE > Vol. 6, N° 4 (10-11-12/2003) . - p. 303-307[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 003881 - Périodique Bibliothèque principale Documentaires Disponible
Titre : DMTA: a versatile instrument for coatings industry Type de document : texte imprimé Auteurs : Ramanuj Narayan, Auteur ; S. Viswanatham, Auteur ; K. V. S. N. Raju, Auteur Année de publication : 2001 Article en page(s) : p. 41-46 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Superposition température temps' Durabilité Durcissement 'résistance choc' Flexibilité 'Résistance abrasion' Dureté 'Température transition vitreuse' 'Densité réticulation' 'Relation structure propriété' 'Propriété dynamomécanique' 'essai dynamique' 'Analyse thermomécanique' Feuil mécanique' physique' Peinture 'Matériau revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : The advent of the Dynamic Mechanical Thermal Analyzer (DMTA) has been able to provide a new insight to the scientist and engineers involved in product research and development for designing newer coating materials. DMTA is a non-resonant, forced vibration type of device capable of operating over a wide frequency range and which measures the viscoelastic response of materials under a sinusoidally oscillating stress for both supported and unsupported materials. It provides a valuable link between chemistry, morphology and performance properties of materials and its application ranges from the measurement of bulk viscoelastic properties to sophisticated analysis of the kinetics of the crosslinking reaction. The interpretations and application of dynamic data can be utilized to calculate cross-link density (XLD), elastically effective chain length between crosslinks (Mc) and the glass transition temperature of the coating materials. The results and information obtained from DMTA can be correlated with other coating film properties. The present paper describes the utility of DMTA in developing coating materials. Note de contenu : - Dynamic mechanical thermal analyzer (DMTA)
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12628
in PAINTINDIA > Vol. LI, N° 11 (11/2001) . - p. 41-46[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 001272 - Périodique Bibliothèque principale Documentaires Disponible 
Titre : Quantification of simultaneous solvent evaporation and chemical curing in thermoset coatings Type de document : texte imprimé Auteurs : Søren Kiil, Auteur Année de publication : 2010 Article en page(s) : p. 569-586 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Polyuréthanes
Réticulation (polymérisation)
Revêtements
solvants
Thermodurcissables
Transition vitreuseTags : Revêtement 'Formation de réseau' 'Piégeage solvant' 'Densité réticulation' Polyuréthane Bi-composant 'Température transition vitreuse' Index. décimale : 667.9 Revêtements et enduits Résumé : The mechanisms of simultaneous solvent evaporation and film formation in high-solids thermoset coatings are considered. The relevant phenomena, chemical reactions, solvent diffusion and evaporation, gelation, vitrification, network mobility restrictions, and crosslinking, are quantified and a mathematical model for a curing film is presented, which does not violate the local volume balance. For model verification, a previous investigation with a polyisocyanate and a polyol in methyl amyl ketone solvent, catalyzed by an organotin compound, was selected. In contrast to earlier modelling studies, simulations can match and explain detailed experimental data. For exemplification, simulations are used to analyse the influence of the various rate phenomena on the behavior of the solvent-based polyisocyanate/polyol film. DOI : 10.1007/s11998-010-9246-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9246-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9912
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 5 (09/2010) . - p. 569-586[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 012448 - Périodique Bibliothèque principale Documentaires Disponible
