Broad band, photostable prevention of UV damage / Robert M. Sayer in PERSONAL CARE EUROPE, Vol. 7, N° 6 (11/2014)  

[article]  inPERSONAL CARE EUROPE > Vol. 7, N° 6 (11/2014) . - p. 20-24 Titre : Broad band, photostable prevention of UV damage Type de document : texte imprimé Auteurs : Robert M. Sayer, Auteur ; Paul Staniland, Auteur Année de publication : 2014 Article en page(s) : p. 20-24 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dermo-cosmétologie Dioxyde de titane Peau -- analyse Peau -- Effet du rayonnement ultraviolet Produits antisolaires Résonance paramagnétique électronique Index. décimale : 668.5 Parfums et cosmétiques Résumé : The effects of UVB radiation have been know for many years with most people protecting themselves from induced burning. More recently the damaging effects of UVA radiation have been highlighted and sunscreens are now formulated to induce protection against induced premature ageing. New skin research is showing the potential of near-UV or HEV light to induce premature ageing, the formation of wrinkles ans DNA damage. A novel Electron Spin Resonance (ERS) technique has been developed to investigate the effect of inorganic and organic sunscreens in preventing radical generation in skin substitutes under the action of UV and near-UV radiation. A spin trap (5-5,Dimethyl-1-Pyrroline-N-Oxyde, DMPO) has been used to from spin adduct, thus prolonging the lifetime of radicals formed in the skin substitutes. Water in oil sunscreen formulations containing titanium dioxide (TiOâ‚‚) with different levels of UVA/UVB attenuation have been used to protect the skin, and the number of radical adducts formed has been investigated. The broad spectrum, photostable TiOâ‚‚ used in the investigation has been shown to reduce the number of radical adducts formed by 70%, when compared to unprotected skin. Thus highlighting the necessity for broad spectrum protection un sunscreen products when looking to reduce the number of radicals generated from UV and near-UV radiation. Note de contenu : - Inorganic sunscreens - Infrared and high-energy visible radiation En ligne : https://drive.google.com/file/d/1ICCZZMnWpvJ9zJ6Aytw9hmVObUCr23Fi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22261 [article]

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Meeting the challenge of baby sun protection / Surinder P. Chahal in PERSONAL CARE EUROPE, Vol. 4, N° 2 (06/2011)  

[article]  inPERSONAL CARE EUROPE > Vol. 4, N° 2 (06/2011) . - p. 39-42 Titre : Meeting the challenge of baby sun protection Type de document : texte imprimé Auteurs : Surinder P. Chahal, Auteur ; Ian R. Tooley, Auteur ; Rob Sayer, Auteur ; Paul Staniland, Auteur Année de publication : 2011 Article en page(s) : p. 39-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane Formulation (Génie chimique) Nourrissons Oxyde de zinc Produits antisolaires Index. décimale : 668.5 Parfums et cosmétiques Note de contenu : - Sunscreens for the baby sun care market - Organic UVA and UVB filters - Combination of TiO2 with zinc oxide (ZnO) - Enhanced UVA TiO2 - UV-Vis performance - Formulations containing enhanced UVA TiO2 - Critical wavelengths of formulations containing enhanced UVA TiO2 - Comparison with zinc oxide - In vitro SPF results - In vivo testing of formulations En ligne : https://drive.google.com/file/d/1UvvdqNLYOiHF3gJ3BXKmsN-reZ9Tli52/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13412 [article]

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Particle characterisation methods for nanomaterials / Paul Staniland in PERSONAL CARE EUROPE, Vol. 8, N° 6 (11/2015)  

[article]  inPERSONAL CARE EUROPE > Vol. 8, N° 6 (11/2015) . - p. 29-34 Titre : Particle characterisation methods for nanomaterials Type de document : texte imprimé Auteurs : Paul Staniland, Auteur ; Ian Tooley, Auteur ; Robert Sayer, Auteur ; Hannah Craney, Auteur ; Elizabeth Ryder, Auteur Année de publication : 2015 Article en page(s) : p. 29-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Dioxyde de titane Nanoparticules Oxyde de zinc Photocatalyse Produits antisolaires Index. décimale : 668.5 Parfums et cosmétiques Résumé : The physical properties of inorganic materials such as titanium dioxide (TiOâ‚‚) and zinc oxide (ZnO) have been utilised in a wide variety of applications for many years. The wide ranging properties of smaller particles of TiOâ‚‚ and ZnO make them ideal for use in sun care products; optimum UV attenuation, coupled with visible transparency results in excellent protection and aesthetic performance. Recently, despite many scientific studies demonstrating the safety of these ingredients, concerns have been raised that some of the unique properties of these particles may result in adverse effects in cosmetic applications. The Scientific Commitee on Consumer Safety (SCCS) recently published Opinions on TiOâ‚‚ and ZnO in their nano form, which detailed specifications that they believed these materials should meet to be classed as 'safe to use' up to certain concentrations. Given the importance of the subject area to both cosmetic manufacturers and consumers, it is essential to have an understanding of the methods which are used to examine the physical properties of such nanomaterials. Many factors affect trhe analysis sample process, from pre-analysis sample preparation to post-analysis data interpretation. This article looks at some of the techniques commonly used tomeasured properties such as particle size,UV protection and photocatalitic activity. Signinificant variations in data can occur if methods are not standardised. The article will also investigate factors such as sample preparation and energy input which can affect results, and highlight the need for correlation of methods with the state of particles in sun care formulations. Note de contenu : - Measuring UV-Vis protection - Particle size and related properties - Sample preparation - solvent choice - Energy input - Measuring photocatalytic activity - TABLES : 1. The physical parameters analysed in SCS opinion SCCS/1516/13 - 2. Comparison of data from the dilution of TiO2 powder and dispersion in various solvents - 3. Data to compare sample processing methods En ligne : https://drive.google.com/file/d/1ChzYVCWwHPnfqjG0whmI3TNJ3cGqwjBs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24914 [article]

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