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Natural formulations with non-nano mineral UV filters / Blanca Motos-Pérez in PERSONAL CARE EUROPE, Vol. 14, N° 2 (04/2020)
[article]
Titre : Natural formulations with non-nano mineral UV filters Type de document : texte imprimé Auteurs : Blanca Motos-Pérez, Auteur Année de publication : 2020 Article en page(s) : p. 119-122 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle
Caractérisation
Chimie écologique
Cosmétiques
Emulsions -- Emploi en cosmétologie
Formulation (Génie chimique)
Formulation (génie chimique) -- Stabilité
Granulométrie
Photostabilité
Produits antisolaires
Rayonnement ultraviolet A
Rayonnement ultraviolet B
Règlements (droit administratif)Index. décimale : 668.5 Parfums et cosmétiques Résumé : ADPCosmetics presents two natural cosmetic formulations that follow Green Chemistry Principles. Non nanometric UV filters included in these formulations are multifunctional and efficient, to minimise the need of ingredients.
EnhanceU filters are manufactured with ADParticles technology that is environmentally friendly and efficient in terms of energy, raw materials and (absence of) solvent consumption. Therefore, the two formulations here presented, named Feel Young and Feel Warm, are natural w/o and o/w emulsions respectively, both for skin care and suncare. enhanceU-S and enhanceUT-warm filters allow obtaining SPF30-50 while efficiently protecting from UVA radiation and are appropriate options when looking for ingredients for sustainable cosmetics.Note de contenu : - Natural formula for skin care and sun care : Feel young
- Natural formula for skin care and sun care with colour : Feel warm
- Mineral UV filters that are nonnanometric and protect from UVB and UVA radiation : High-SPF and broad-spectrum protection - Photostability - Stability - Sensoriality - Manipulation and safety - Regulations - Natural formulas
- Fig. 1 : Feel young cream w/o formulation
- Fig. 2 : Particle size distribution of enhanceU-S by dynamic light scattering
- Fig. 3 : Feel warm daily cream with colour
- Fig. 4 : Photostability of enhanceU mineral filters
- Table 1 : Characterisation of natural formulas after 3 months' stability (mean values)
- Table 2 : EnhanceU filtersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33960
in PERSONAL CARE EUROPE > Vol. 14, N° 2 (04/2020) . - p. 119-122[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21621 - Périodique Bibliothèque principale Documentaires Disponible Oleracone C from Portulaca oleracea attenuates UVB-induced changes in matrix metalloproteinase and type I procollagen production via MAPK and TGF-β/Smad pathways in human keratinocytes / Jung Hwan Oh in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 2 (03-04/2023)
[article]
Titre : Oleracone C from Portulaca oleracea attenuates UVB-induced changes in matrix metalloproteinase and type I procollagen production via MAPK and TGF-β/Smad pathways in human keratinocytes Type de document : document électronique Auteurs : Jung Hwan Oh, Auteur ; Fatih Karadeniz, Auteur ; Jung Im Lee, Auteur ; Youngwan Seo, Auteur ; Chang-Suk Kong, Auteur Année de publication : 2023 Article en page(s) : p. 166-176 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antiâge
Cellules -- Cultures et milieux de culture
Cosmétiques
Espèces réactives de l'oxygène
Extraits de plantes:Extraits (pharmacie)
KératinocytesLes kératinocytes sont des cellules constituant 90 % de la couche superficielle de la peau (épiderme) et des phanères (ongles, cheveux, poils, plumes, écailles). Ils synthétisent la kératine (kératinisation), une protéine fibreuse et insoluble dans l'eau, qui assure à la peau sa propriété d'imperméabilité et de protection extérieure.
L'épiderme est divisé en 4 couches basées sur la morphologie des kératinocytes (de l'intérieur vers l'extérieur) :
1. stratum germinativum (couche basale à la jonction avec le derme)
2. stratum spinosum
3. stratum granulosum
4. stratum lucidum
5. stratum corneum
Les kératinocytes passent progressivement de la couche basale vers les couches supérieures par différenciation cellulaire jusqu'au stratum corneum ou ils forment une couche de cellules mortes nommées squames, par apoptose. Cette couche constitue une barrière de protection et réduit la perte d'eau de l'organisme.
Les kératinocytes sont en perpétuel renouvellement. Ils mettent environ 1 mois pour aller de la couche basale au stratum corneum mais ce processus peut être accéléré en cas d'hyperprolifération de kératinocyte (psoriasis).
Mesure
Oleracone C
Peau -- Soins et hygiène
Photovieillissement (dermatologie)
Procollagène
Protection contre le rayonnement ultraviolet
Rayonnement ultraviolet BIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Background : Chronic exposure to ultraviolet (UV) radiation induces photo-oxidation, which in turn causes the overproduction of matrix metalloproteinases (MMPs) and collagen degradation. These symptoms are referred to as photoaging, which is characterized by skin thickness, irregular pigmentation, elastosis and coarse wrinkles. In this study, the protective effects of oleracone C isolated from Portulaca olerace against UVB-induced changes in MMPs and type I procollagen production were investigated in human keratinocytes.
- Methods : Human immortalized keratinocytes have been used as an in vitro cell model to study the abnormal skin barrier development such as in photoaging. The effects of the compound on cell viability were determined by colorimetric MTT assay. This study also measured ROS production using DCFH-DA assay. Releases of MMPs and type Iα1 procollagen were analysed by ELISA. RT-PCR and Western blot were carried out to test the expressions of mRNA and proteins related to MMPs and type I procollagen biosynthesis.
- Result : Effect of oleracone C against UVB-mediated oxidative stress was evaluated measuring its ability to eliminate UVB-induced activation of reactive oxygen species (ROS). Treatment of oleracone C hindered the production of intracellular ROS. UVB exposure increased MMPs (MMP-1, MMP-2 and MMP-9) release from keratinocytes and decreased the release of type I procollagen. Treatment with oleracone C reversed these effects of UVB exposure. Oleracone C treatment also diminished the intracellular expression of MMP-1, MMP-2 and MMP-9 and elevated the type I procollagen. Oleracone C suppressed the UVB irradiation-dependent upregulation phosphorylation of p38 and ERK1/2 in the mitogen-activated protein kinase (MAPK) pathway. Furthermore, oleracone C stimulated collagen production through the TGF-β signalling pathway, which activates collagen synthesis in UVB-irradiated keratinocytes.
- Conclusion : These findings reasonably suggest ameliorating the potential of oleracone C against the UVB-induced photoaging of the human keratinocytes.Note de contenu : - MATERIALS AND METHODS : Reagents - Extraction and isolation of oleracone C from Potulaca oleracea - Cell culture and UV irradiation - Cell viability - Measurement of ROS production - Enzyme-linked immunosorbent assay - Reverse transcription-polymerase chain reaction (RT-PCR) - Western blot analysis - Statistical analysis
- RESULTS : Cytotoxicity of oleracone C in HaCaT keratinocytes - Cytoprotective effect of oleracone C against UVB-induced - Effect of oleracone C on UVB-induced ROS production cytotoxicity - Effect of oleracone C on MMPs and type Iα1 procollagen secretions in UVB-irradiated keratinocytes - Effect of oleracone C on MMPs and type I
procollagen expressions in UVB-irradiated keratinocytes - Effect of oleracone C on MAPKs expression and phosphorylation - Effect of oleracone C on TGF-β/Smad
signalling in UVB-irradiated keratinocytesDOI : https://doi.org/10.1111/ics.12828 En ligne : https://drive.google.com/file/d/1e2VOp_wPSCpirDYxsYovBlLAelGY_TUB/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39167
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 2 (03-04/2023) . - p. 166-176[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Redox proteomic evaluation of oxidative modification and recovery in a 3D reconstituted human skin tissue model exposed to UVB / J. M. Dyer in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 2 (04/2017)
[article]
Titre : Redox proteomic evaluation of oxidative modification and recovery in a 3D reconstituted human skin tissue model exposed to UVB Type de document : texte imprimé Auteurs : J. M. Dyer, Auteur ; S. R. Haines, Auteur ; A. Thomas, Auteur ; W. Wang, Auteur ; R. J. Walls, Auteur ; S. Clerens, Auteur ; D. P. Harland, Auteur Année de publication : 2017 Article en page(s) : p. 197-205 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie analytique
Collagène
Oxydation
Oxydoréduction
Peau -- Physiologie
ProtéomiqueLa protéomique désigne la science qui étudie les protéomes, c'est-à -dire l'ensemble des protéines d'une cellule, d'un organite, d'un tissu, d'un organe ou d'un organisme à un moment donné et sous des conditions données.
Dans la pratique, la protéomique s'attache à identifier de manière globale les protéines extraites d'une culture cellulaire, d'un tissu ou d'un fluide biologique, leur localisation dans les compartiments cellulaires, leurs éventuelles modifications post-traductionnelles ainsi que leur quantité.
Elle permet de quantifier les variations de leur taux d'expression en fonction du temps, de leur environnement, de leur état de développement, de leur état physiologique et pathologique, de l'espèce d'origine. Elle étudie aussi les interactions que les protéines ont avec d'autres protéines, avec l'ADN ou l'ARN, ou d'autres substances.
La protéomique fonctionnelle étudie les fonctions de chaque protéine.
La protéomique étudie enfin la structure primaire, secondaire et tertiaire des protéines. (Wikipedia)
Rayonnement ultraviolet -- Effets physiologiques
Rayonnement ultraviolet BIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Exposure to UV in humans resulting in sunburn triggers a complex series of events that are a mix of immediate and delayed damage mediation and healing. While studies on the effects of UV exposure on DNA damage and repair have been reported, changes in the oxidative modification of skin proteins are poorly understood at the molecular level, despite the important role played by structural proteins in skin tissue, and the effect of the integrity of these proteins on skin appearance and health. Proteomic molecular mapping of oxidation was here applied to try to enhance understanding of skin damage and recovery from oxidative damage and UVB exposure.
A redox proteomic-based approach was applied to evaluating skin protein modification when exposed to varying doses of UVB after initial oxidative stress, via tracking changes in protein oxidation during the healing process in vitro using a full-thickness reconstituted human skin tissue model. Bioassays and structural evaluation confirmed that our cultured skin tissues underwent a normal physiological response to UVB exposure.
A set of potential skin marker peptides was generated, for use in tracking skin protein oxidative modification. Exposure to UVB after thermal oxidative stress was found to result in higher levels of skin protein oxidation than a non-irradiated control for up to seven days after exposure. Recovery of the skin proteins from oxidative stress, as assessed by the overall protein oxidation levels, was found to be impaired by UVB exposure. Oxidative modification was largely observed in skin structural proteins.
Exposure of skin proteins to UVB exacerbates oxidative damage to structural skin proteins, with higher exposure levels leading to increasingly impaired recovery from this damage. This has potential implications for the functional performance of the proteins and inter-related skin health and cosmetic appearance.Note de contenu : - MATERIALS AND METHODS : Skin tissue cultures - Irradiation and sampling - proteomics- Redox modification scoring - Bioassays - Microscopy
- RESULTS AND DISCUSSION : Bioassays - Redox proteomic evaluation - Structural evaluationDOI : 10.1111/ics.12365 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28250
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Code-barres Cote Support Localisation Section Disponibilité 18794 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and application of silver nanoparticles as biocidal agent in polyurethane coating / M. Bechtold in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)
[article]
Titre : Synthesis and application of silver nanoparticles as biocidal agent in polyurethane coating Type de document : texte imprimé Auteurs : M. Bechtold, Auteur ; A. Valério, Auteur ; Antônio Augusto Ulson de Souza, Auteur ; D. de Oliveira, Auteur ; C. V. Franco, Auteur ; R. Serafim, Auteur ; S. M. A. Guelli U. Souza, Auteur Année de publication : 2020 Article en page(s) : p. 613–620 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Argent
Caractérisation
Essais de résilience
Nanoparticules
Polyuréthanes
Rayonnement ultraviolet B
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanostructured materials have become increasingly widespread, and in recent decades, the processing industries have shown a great interest in coating materials with antibacterial properties. In this research, the biocidal effect of silver nanoparticles in the water-soluble polyurethane paint composition was evaluated. Silver nanoparticles in the aqueous phase were prepared by chemical reduction at 500 ppm using polyvinyl alcohol. The material was characterized by UV–Vis, inductively coupled plasma mass spectrometry, dynamic light scattering, zeta potential, and transmission electron microscopy. The effect of silver nanoparticles in terms of yellowing and gloss variation was evaluated by a UV-B radiation test. Silver nanoparticles had no effect on the gloss and yellowing paint film. In addition, positive results were obtained for the protection and resistance against bacteria but not satisfactory resistance against fungi. Note de contenu : - MATERIALS AND METHODS : Synthesis and characterization of silver nanoparticles (AgNPs) - Polyurethane paint preparation - UV-B radiation test - Microbial content - In-can preservation - Fungal resistance - Bacterial resistance
- RESULTS AND DISCUSSION : Synthesis and characterization of AgNPs - UV-B radiation test - Microbial contentDOI : https://doi.org/10.1007/s11998-019-00297-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00297-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34093
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 3 (05-06/2020) . - p. 613–620[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21734 - Périodique Bibliothèque principale Documentaires Disponible