Innovative sunscreen with cooling effect for protection in the VIS and NIR regions for Asian skin type / Alexandra Lan in SOFW JOURNAL, Vol. 144, N° 10 (10/2018)  

[article]  inSOFW JOURNAL > Vol. 144, N° 10 (10/2018) . - p. 54-61 Titre : Innovative sunscreen with cooling effect for protection in the VIS and NIR regions for Asian skin type Type de document : texte imprimé Auteurs : Alexandra Lan, Auteur ; Bin Chen, Auteur ; Lei Ye, Auteur ; Keesuh Lee, Auteur ; Nan Lu, Auteur ; Dongfang Kang, Auteur ; Jürgen Lademann, Auteur ; Sabine Schanzer, Auteur ; Silke Barbara Lohan, Auteur ; Martina C. Meinke, Auteur Année de publication : 2018 Article en page(s) : p. 54-61 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents rafraichissants Antiradicalaire Facteur de protection solaire Formulation (Génie chimique) Peau asiatique Produits antisolaires Protection contre le rayonnement infrarouge Protection contre le rayonnement ultraviolet Statistique Index. décimale : 668.5 Parfums et cosmétiques Résumé : In view of the globally increasing incidence of skin cancer, sun exposure and the application of sunscreens are steadily gaining in importance. Today it is known that skin damage is caused not only by UV-induced erythema but also by increased amounts of free radicals that are formed by solar radiation in the visible and near infrared (NIR) spectral regions and sun protection could be different for the different skin types. The antioxidant capacity and the scattering properties of the formulation were determined as important protection beyond ultraviolet (UV) light. The radical protection in the visible and NIR regions was determined ex vivo using EPR spectroscopy. The cooling effect of the formulation was analyzed on Asian skin in vivo, and the NIR protection was investigated by measuring cutaneous carotenoids before and after NIR radiation. The company Pechoin was the 'first en¬terprise to develop a sunscreen for the skin types III — VI. This product protects efficiently both from UV and NIR solar radiation. Its formulation consists of a well-balanced selection of titanium dioxide pigments, highly efficient antioxidants as used in the traditional Chinese medicine, and coolants. Thanks to all these ingredients the concentration of radicals can be clearly reduced, especially in darker skin types. Note de contenu : - Subjects - Sunscreen - Determination of the Radical Protection Factor (RPF) of the ingredients and the sunscreen sample - Determination of the optical properties of the sunscreen sample - Cooling effect in vivo - SPF determination in vivo - NIR protection in vivo - Statistical analysis - Table 1 : RPF and scattering coefficient µs' at 800 nm of the investigated formulation compared to previously investigated sunscreen (12) shown - Fig. 1 : Optical properties absorption µa and scattering effective coefficient µs' of the new sunscreen between 450 and 800 nm - Fig. 2 : Cumulative radical formation in the skin after irradiation with 71 mW in the VIS/NIR spectral range. Mean ± SEM, *** p ⩽ 0.001 ; statistically significant difference in relation to unprotected skin (untreated) - Fig. 3 : Box plot of the radical production in the skin after 10 min VIS/NIR irradiation (*** p ⩽ 0.001) - Fig. 4 : Skin temperature course measured before and during NIR irradiation (60mW/cm2). At treated area 2 mg/cm2 sunscreen was applied, n=10 - Fig. 5 : Relative carotenoid concentration in the skin, before and after NIR irradiation (60m/W/cm2) for untreated and sunscreen treated skin (2 mg/cm2), n=6 En ligne : https://drive.google.com/file/d/1OlmTHFwrDGMPYLLEfhTDql9zd4WLTo1j/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31330 [article]

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