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Reconstructed human epidermis as an efficient tool in the evaluation of the effects of UV irradiation and of the photoprotective capacities of a sunblock / Alain Mavon in IFSCC MAGAZINE, Vol. 7, N° 3 (07-08-09/2004)
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Titre : Reconstructed human epidermis as an efficient tool in the evaluation of the effects of UV irradiation and of the photoprotective capacities of a sunblock Type de document : texte imprimé Auteurs : Alain Mavon, Auteur ; Christelle Gélis, Auteur ; Patricia Vicendo, Auteur Année de publication : 2004 Article en page(s) : p. 209-214 Note générale : Bibliogr. Langues : Anglais (eng) Tags : UVA 'Irradiation solaire' 'Expression P53' Produit antisolaire' 'Modèle alternatif' 'Reconstruction de l'épiderme humain' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Solar or UVA (ultraviolet A) irradiation of the skin causes biological damage, including apoptosis, which is evident in the form of sunburn cells and the overexpression of p53. These two parameters, as well as the measurement of cellular viability, were used to evaluate the effects of UV irradiation on a reconstructed human epidermis (RHE) model, with and without the photoprotection of a broad spectrum sunblock. Reconstructed epidermis models were irradiated by solar spectrum (420 mJ cm–2) or UVA (20 J cm–2). In the absence of irradiation, and with irradiation doses of 420 mJ cm–2 and 20 J cm–2, viability was estimated at 95, 12 and 70% respectively. Sunburn cells per cm were evaluated at 0, 41 and 22, respectively under these same conditions. The apoptotic response was studied through the expression of p53, which increased at first and was then followed by a specific cleavage, 24 h after irradiation at 420 mJ cm–2. However, in the presence of a broad spectrum sunblock preparation (a combination of OMC, MBTBP, TiO2 and ZnO) and after irradiation at 420 mJ cm–2 and 20 J cm–2, viability increased to 40 and 85% respectively. The number of sunburn cells (SBC) per cm fell to 12 and nine respectively. The photoprotection provided by the sunblock limited the increase in the expression of p53 and resulted in the total disappearance of the cleavage. This study shows that human reconstructed epidermis is a valid skin model for use in the evaluation of the effects of solar and UVA irradiation, as well as in the testing of the efficacy of sunfilters. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10476
in IFSCC MAGAZINE > Vol. 7, N° 3 (07-08-09/2004) . - p. 209-214[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003884 - Périodique Bibliothèque principale Documentaires Disponible Controlling method for UV-curing processes / Hans-Peter Seng in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/98 (11/1998)
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Titre : Controlling method for UV-curing processes : A method for the end user Type de document : texte imprimé Auteurs : Hans-Peter Seng, Auteur Année de publication : 1998 Article en page(s) : p. 838-841 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Durcissement 'Irradiation UV' Contrôle 'Mobilité ion' Spectrométrie Index. décimale : 667.9 Revêtements et enduits Résumé : There is a wide range of analysis techniques available for the determination of the through-curing of UV-curable coatings. But all these highly sophisticated methods can only be performed by specialists. Especially, quality assurance departments are looking for a method that can be applied as directly as possible in-line, in the coating and printing process, and which is in particular easy to handle. The ion mobility spectrometry can be regarded as such a method as this article shows. Besides describing this method examples are given on its use in different printing processes. Note de contenu : - Description of the ion mobility spectrometry (IMS) : Structure of the ion-mobility spectrometer - Ion generation - Ion separation - Measurement signal of an ion mobility spectrometer - Possible applications of the ion mobility spectrometer
- Description of test with irradiation curable substances
- Results
- Performance profile of IMS method: UV overprint varnish - Dry offset printing of plastic tubes - UV continuous stationary offsetPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11152
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11/98 (11/1998) . - p. 838-841[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000598 - Périodique Bibliothèque principale Documentaires Disponible Des revêtements conformes aux réglementations / Richard Kennedy in EUROPEAN COATINGS JOURNAL (ECJ), N° 10/94 (10/1994)
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Titre : Des revêtements conformes aux réglementations : le pour et le contre Type de document : texte imprimé Auteurs : Richard Kennedy, Auteur Année de publication : 1994 Article en page(s) : p. 670-689 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture poudre' eau' haute teneur solide' Séchage Durcissement 'Rayonnement UV' 'Irradiation électron' 'Prévention pollution' Index. décimale : 667.9 Revêtements et enduits Résumé : La législation a entraîné l'industrie des peintures à développer et à améliorer des revêtements respectueux de l'environnement. En plus de la substitution et du remplacement des solvants organiques du revêtement, les développements ont eu pour objectif de remplacer le plomb, le chrome et d'autres métaux lourds des revêtements chaque fois que possible. On a également développé des revêtements sans isocyanates. On tient compte de l'élimination des déchets: les revêtements ou les équipements sont développés afin de permettre le recyclage et la réutilisation. Note de contenu : - Revêtements par poudres
- Les peintures à base aqueuse
- Les "hauts extraits secs"
- Séchage par irradiation
- Le futurPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11253
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10/94 (10/1994) . - p. 670-689[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002497 - Périodique Bibliothèque principale Documentaires Disponible Acrylic monomers for radiation curing / M. Uminski in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 6 (06/1995)
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Titre : Acrylic monomers for radiation curing Type de document : texte imprimé Auteurs : M. Uminski, Auteur ; L. M. Saija, Auteur Année de publication : 1995 Article en page(s) : p. 244-249 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Durcissement 'Rayonnement UV' 'Irradiation électron' Formulation Liant Monomère 'Acrylate polymère' 'Article synthèse' Index. décimale : 667.9 Revêtements et enduits Note de contenu : - ADVANTAGES AND LIMITATIONS OF RADIATION CURING TECHNOLOGY
- MARKET TRENDS
- UV AND EB FORMULATIONS
- CURING PROCESS : Free radical polymerization scheme - Cationic polymerization scheme
- MONOMERS DEVELOPMENT : First generation monomers - Second generation monomers - Third generation monomers
- MELAMINE ACRYLATES
- TOXICITY, REACTIVITY, SHRINKAGE
- LATEST DEVELOPMENTS OF RADCURE TECHNOLOGY : Dual cure systems - Hybrid cure systems - Water-borne systemsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16969
in SURFACE COATINGS INTERNATIONAL > Vol. 78, N° 6 (06/1995) . - p. 244-249[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006563 - Périodique Bibliothèque principale Documentaires Disponible Biosynthesis of a UV stable pigment : prodigiosin / V. Natarajan in PAINTINDIA, Vol. XLV, N° 10 (10/1995)
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Titre : Biosynthesis of a UV stable pigment : prodigiosin Type de document : texte imprimé Auteurs : V. Natarajan, Auteur ; P. K. Kamath, Auteur Année de publication : 1995 Article en page(s) : p. 23-33 Note générale : Glossaire - Bibliogr. Langues : Anglais (eng) Tags : Biosynthèse Pigment Prodigiosine 'Serratia marcescens' 'Culture de microorganismes' Mutagenèse Optimisation 'Zinc II Ion' Mutation 'Cobalt 'Milieu culture' 'Nickel 'Elément trace' 'Fer Nutriment 'Titane 'Irradiation UV' 'Molybdène Enterobacteriaceae Bactérie Index. décimale : 667.9 Revêtements et enduits Résumé : Pigment Prodigiosin is red maroon in colour and has a pyrrye dipyrryl methene structure. It is water insoluble and occurs membrane bound in the cells of Serratia marcescens, which is gram negative bacterium. As the parent strain of Serratia marcescens NRRL B284 was found to be unstable in its pigment synthesising ability, an attempt was therefore made to derive UV stable mutants employing UV induced mutagenesis. Out of seven mutants derived, a lone mutant designed M2 was found to be most promising both in terms of stable pigment producing characters as well as faster growth rates in select synthetic medium compared to the rest of the mutants. Studies on mutant M2 constitue optimisation of Carbon:Nitrogen ratio in the synthetic medium selected, followed by studies on feeding salts of trace cations during cell cultivation (as nutrient modifiers) to explore further (if any), scope for improving the UV stability of the pigment synthesised. The role/contribution towards UV stability by trace cations e.g. Mo++, Ti++, Fe++, Ni++, Co++ and Zn++ were investigated. Select UV stable pigments were evaluated for their performance in two types of air drying paints, with intersting results with respect to colour and gloss retention Note de contenu : HISTORY OF PROIDOGIOSIN
- SCOPE OF CURRENT WORK
- MATERIAL AND METHODS
- EXPERIMENTAL : Culture maintenance and inoculum preparation - Screening of media for pigment production - Optimisation of carbone : nitrogen ratio for pigment synthesis - Cell harvesting, determination of biomass, pigment extraction - Chromatographic analysis of pigment - Reversion to chromogenic variants - Role of oxygen - Straint improvement through UV mutagenesis - Screening of salts of trace cations as nutrient modifiers - Pigment screening for uv stability - Prodigiosin for paint application
- RESULTS AND DISCUSSION : Reversion to chromogenic variants - UV induced mutagenesis and effect of mutation - Effect of oxyten - Effect of optimising carbon : nitrogen in synthetic medium for mutant M2 - Composition of MSM - Effect of trace cations on UV stability of pigment - Performance of prodigiosin in paints - IR interpretationPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13665
in PAINTINDIA > Vol. XLV, N° 10 (10/1995) . - p. 23-33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006457 - Périodique Bibliothèque principale Documentaires Disponible Development of electron beam curable coatings for prepainted strip / G. M. Miasik in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 6 (06/1996)
PermalinkESR study of photoinduced free radicals by visible light in hair and the effects of ascorbic acid (vitamin C) / E. Chikvaidze in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 33, N° 4 (08/2011)
PermalinkIn-vivo measurements of free radicals in human skin / Leonhard Zastrow in IFSCC MAGAZINE, Vol. 6, N° 4 (10-11-12/2003)
PermalinkNew coating technologies for wood products an evaluation and review / Mehdi Tavakoli in EUROPEAN COATINGS JOURNAL (ECJ), N° 12/96 (12/1996)
PermalinkRadiation-curable silicone-based additives for coatings and printing inks / Karen Bowling in PAINTINDIA, Vol. XLIX, N° 9 (09/1999)
PermalinkRadiation curing : An innovation for customer satisfaction / Balwant Kaur in PAINTINDIA, Vol. XLVII, N° 4 (04/1997)
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