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Oxidative effects of cigarette smoke on the human skin / M. Egawa in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 21, N° 2 (04/1999)
[article]
Titre : Oxidative effects of cigarette smoke on the human skin Type de document : texte imprimé Auteurs : M. Egawa, Auteur ; Yoshimaru Kumano, Auteur Année de publication : 1999 Article en page(s) : p. 83–98 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimiluminescence
Chromatographie en phase liquide à hautes performances
Oxydation
Peau -- analyse
Tabac -- Effets physiologiquesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : The oxidative effects of cigarette smoke on the human skin were investigated. A remarkable increase in the conversion ratio of squalene (SQ) to squalene monohydroperoxide (SQHPO) due to exposure to cigarette smoke was observed using a CL-HPLC (high performance liquid chromatography with a chemiluminescence detector) system. The results showed that cigarette smoke caused lipid peroxidation. We also found that the addition of chain-breaking-type antioxidants, such as oolong tea extract, inhibited the peroxidation. When cultured human skin fibroblasts were exposed to cigarette smoke, this increased the intensity of ultraweak chemiluminescence (CL), leading us to assume that cigarette smoke caused oxidation in cultured human skin fibroblasts. When the cultured human skin fibroblasts were treated with antioxidants such as glutathione, thiotaurine, hypotaurine and ascorbic acid there was little increase in CL, meaning that oxidation had been prevented in the human skin fibroblasts. We also exposed the human forearm to cigarette smoke and obtained sebum using cotton immersed in acetone in order to measure hydroperoxide levels by means of a CL-HPLC system. The exposure of skin to the smoke caused a dose-dependent increase in hydroperoxides derived from cigarette smoke. Further exposure of the forearm to cigarette smoke increased the intensity of CL, but pretreating the skin with antioxidants such as glutathione, thiotaurine and hypotaurine inhibited this increase. From these results, we concluded that cigarette smoke had an oxidative effect on SQ, cultured human skin fibroblasts and the surface of the human skin. The application of antioxidants prevented the cigarette smoke-induced oxidation. We consider that these oxidative effects on the skin could be a cause of skin disorders and skin aging. DOI : 10.1046/j.1467-2494.1999.181656.x En ligne : https://onlinelibrary.wiley.com/doi/10.1046/j.1467-2494.1999.181656.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26494
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 21, N° 2 (04/1999) . - p. 83–98[article]Penetration of the polyflavonoids and simple phenolics : a mechanistic investigation of vegetable tanning / Teng Bo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 12 (12/2017)
[article]
Titre : Penetration of the polyflavonoids and simple phenolics : a mechanistic investigation of vegetable tanning Type de document : texte imprimé Auteurs : Teng Bo, Auteur ; Jiacheng Wu, Auteur ; Wuyong Chen, Auteur Année de publication : 2017 Article en page(s) : p. 420-427 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse quantitative (chimie)
Chromatographie en phase liquide à hautes performances
Flavonoïdes
Phénols
Tannage végétal
Tannage végétal -- AnalyseIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Mechanisms of tanning are the fundamental base for predicting and developing new tanning agents and technologies. However, many mechanistic questions remain for us, such as: How does the penetration happen? How do the phenolic compounds work individually? In this study, penetration processes of the tannin extracts were investigated with the Bayberry extract (prodelphenidins), the Larch extract (procyanidins) and the Acacia Mangium extract (prodelphenidin-procyanidin complexes) used as tanning agents. During the process, the tanning liquids were regularly sampled and the simple phenolics and polyflavonoids were quantified respectively with a Prussian blue assay, a conductivity analysis, an acid-butanol assay as well as a HPLC analysis. The results showed that, during tannin, the concentration of polyflavonoids in the tanning liquid decreased continuously. In contrast, for the simple phenolics, the concentration decreased at first and later increased. Therefore, penetration processes of the tannin extracts can be described as: in the beginning, both simple phenolics and polyflavonoids started to penetrate; then the simple phenolics completed their penetration first and reversibly bound with collagens; in the meantime, the polyflavonoids were still penetrating and gradually replacing those simple ones from collagen matrix; at the end of the tanning processes, most of the simple phenolics were replaced by the polyflavonoids, meanwhile they were migrated back into the tanning liquids. The results will provide valuable information to help understanding the mechanism of vegetable tanning. Note de contenu : - EXPERIMENTAL : Sample preparation - Prussian blue assay - Conductivity test - Acid-butanol assay - HPLC Analysis
- RESULTS AND DISCUSSION : The total phenolics in the tanning liquids - The simple phenolics in the tanning liquids - The polyflavonoids in the tanning liquids - The results of the HPLC analysis - The penetration process of the simple phenolics and the polyflavonoidsEn ligne : https://drive.google.com/file/d/12TJld_K4j2JVVhKQPVKHK9m1eTpim3mT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29588
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 12 (12/2017) . - p. 420-427[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19426 - Périodique Bibliothèque principale Documentaires Disponible Penetration studies of active model substances from an O/W emulsion - Influence of the lipophilicity of the formulation in human skin in IFSCC MAGAZINE, Vol. 15, N° 3 (07-08-09/2012)
[article]
Titre : Penetration studies of active model substances from an O/W emulsion - Influence of the lipophilicity of the formulation in human skin Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 175-183 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption cutanée
Biomolécules actives
Chromatographie en phase gazeuse
Chromatographie en phase liquide à hautes performances
Emulsions -- Emploi en cosmétologie
Médicaments -- Lipophilie
Spectrométrie de masseIndex. décimale : 668.5 Parfums et cosmétiques Résumé : For use of topical and transdermal formulations, besides the potency of the active substance, selection of a suitable vehicle is very crucial since it can affect both drug release and skin penetration. Factors that contribute to selection are the solubility of the drug in the vehicle, release of the drug from the vehicle into the skin and enhancement of drug penetration through the stratum corneum. The main aim of this study was to analyze the influence of the lipophilicity of the vehicles systems on liberation from the multilayer membrane system and penetration into human skin of active model substances. For this purpose three actives with different physicochemical properties, dihydroavenanthramide D, salicyloyl phytosphingosine and glycyrrhizinic acid, were chosen. Model emulsions with different amounts of the oil phase (5%, 18.5% and 40%) containing Myritol PC (propylene glycol dicaprylate/dicaprate) as the lipophilic marker component were prepared. For liberation behavior of the three substances and the liphphilic component of the emulsions, the solvent drag theory could be suggested. Penetration profiles of the two model substances (dihyroave-nanthramide D and glycyrrhizinic acid) were investigated.
An increasing amount of lipid phase in emulsions did not affect the penetration profile of the substances and the lipophilic marker component in skin and the above mentioned solvent drag theory could not explain the penetration profile of the active model components.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15750
in IFSCC MAGAZINE > Vol. 15, N° 3 (07-08-09/2012) . - p. 175-183[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14137 - Périodique Bibliothèque principale Documentaires Disponible 15777 - Périodique Bibliothèque principale Documentaires Disponible Plastiques. Résines phénoliques - Norme NF EN ISO 11401 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1998)
Titre de série : Plastiques Titre : Résines phénoliques - Norme NF EN ISO 11401 Type de document : texte imprimé Auteurs : Association Française de Normalisation (Paris) , Auteur Editeur : Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) Année de publication : 1998 Importance : 6 p. Présentation : ill. Format : 30 cm Note générale : Annexe Langues : Français (fre) Catégories : Chromatographie en phase liquide à hautes performances
Essais (technologie) -- Normes
Matières plastiques -- Normes
Phénoplastes
Séparation (technologie)Index. décimale : 668.4 Plastiques, vinyles Résumé : Le présent document prescrit des méthodes chromatographiques pour la séparation des résines phénoliques. La séparation se fait selon la masse moléculaire et/ou la polarité. Indice de classement : T 51-404 Classification ICS : 83.080.10 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18164 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15007 T 51-404 Norme Bibliothèque principale Documentaires Disponible Plastiques. Résines thermodurcissables. Analyse par chromatographie en phase liquide - Norme T 51-506 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1990)
Titre de série : Plastiques Titre : Résines thermodurcissables. Analyse par chromatographie en phase liquide - Norme T 51-506 Type de document : texte imprimé Auteurs : Association Française de Normalisation (Paris) , Auteur Editeur : Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) Année de publication : 1990 Importance : 17 p. Présentation : ill. Format : 30 cm Langues : Français (fre) Catégories : Chimie analytique
Chromatographie en phase liquide à hautes performances
Matières plastiques -- Normes
Thermodurcissables -- NormesIndex. décimale : 668.4 Plastiques, vinyles Résumé : La présente norme donne le principe de la méthode d'analyse des résines thermodurcissables, résine seule ou extraite des préimprégnés, par chromatographie en phase liquide. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18182 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15028 T 51-506 Norme Bibliothèque principale Documentaires Disponible Rapid determination of 2-butanone, 2-pyrrolidone and N-methyl pyrrolidone in leather by UPLC / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 4 (07-08/2014)
PermalinkRapid determination of L-ascorbic acid content in vitamin C serums by ultra-high-performance liquid chromatography–tandem mass spectrometry / Jessica Santos Pizzo in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 44, N° 1 (02/2022)
PermalinkRapid determination of six aldehydes in leathers by ultra performance liquid chromatography / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 4 (07-08/2013)
PermalinkA rapid High Performance Liquid Chromatographic (HPLC) method for the simultaneous determination of seven UV filters found in sunscreen and cosmetics / M. Wharton in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 33, N° 2 (04/2011)
PermalinkA rapid method for measuring elastin degradation and its application in leather manufacturing / Xu Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 8 (08/2020)
PermalinkA rapid quantification of hydroxyproline in leather using High-Performance Liquid Chromatography - Fluorescence Detection (HPLC-FLD) method / Priya Narayanan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 5 (05/2023)
PermalinkResearch on formaldehycle emission characteristics of leather with porous structure by sealed jar method / Yuan Xuzheng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 6 (11-12/2017)
PermalinkSeparation of sunscreens in skincare creams using greener high-temperature liquid chromatography and subcritical water chromatography / B. Kapalavavi in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 2 (04/2012)
PermalinkA simple and reliable isocratic high-performance chromatographic assay for the simultaneous determination of hydrophilic benzophenone-4 and lipophilic octocrylene in sunscreens / Patrick Pan in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 4 (08/2023)
PermalinkSimultaneous determination of some ultraviolet-absorbing chemicals in sunscreen cosmetics using a high-performance liquid chromatography method / T. Liu in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 33, N° 5 (10/2011)
PermalinkSimultaneous determination of water-soluble whitening ingredients and adenosine in different cosmetic formulations by high-performance liquid chromatography coupled with photodiode array detection / J. S. Jeon in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 38, N° 3 (06/2016)
PermalinkSimultaneous separation and determination of 15 organic UV filters in sunscreen cosmetics by HPLC-ESI-MS/MS / X. Meng in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 4 (08/2017)
PermalinkStability of a Rhus Coriaria L. tannin extract under different storage conditions / A. Zalacain in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 6 (11-12/2001)
PermalinkStrong antioxidant defence from green tea extract / Vanessa E. Rivera in PERSONAL CARE EUROPE, Vol. 14, N° 2 (04/2020)
PermalinkStudies on the stability of preservatives under subcritical water conditions / B. Kapalavavi in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 37, N° 3 (06/2015)
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