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Remission spectrophotometry and colorimetric studies of tannin and tamol / M. Brandt in IFSCC MAGAZINE, Vol. 3, N° 1 (01-02-03/2000)

[article]  inIFSCC MAGAZINE > Vol. 3, N° 1 (01-02-03/2000) . - p. 5-11 Titre : Remission spectrophotometry and colorimetric studies of tannin and tamol Titre original : Do these two tanning agents have comparable antiinflammatory effects? Type de document : texte imprimé Auteurs : M. Brandt, Auteur ; M. Rohr, Auteur ; Annika Schrader, Auteur Année de publication : 2000 Article en page(s) : p. 5-11 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Curative  antiinflammatory  efficacy'  'Colorimetric  determinations  (chromameter)'  'Remission  analysis'  Spectroscopy  'Tanning  agents'  'Erythema  healing  rates' Index. décimale : 668.5 Parfums et cosmétiques Résumé : In comparative studies, comprehensive data were generated for determining the curative antiinflammatory efficacy of tannin and tamol. Measurements were performed with a remission spectrophotometer and compared to kinetic measurements with a chromameter to investigate the response of erythema of the skin induced by UV exposure. In vivo UV erythema models were used to show how these natural and synthetic tanning agents affect the erythema healing rate. Analysis was performed in the ultraviolet, visible to the near-infrared spectral range. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10838 [article]

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Development of an in-vivo method for the study of the cutaneous metabolism / Aurora Benaiges in IFSCC MAGAZINE, Vol. 3, N° 1 (01-02-03/2000)

[article]  inIFSCC MAGAZINE > Vol. 3, N° 1 (01-02-03/2000) . - p. 13-17 Titre : Development of an in-vivo method for the study of the cutaneous metabolism Type de document : texte imprimé Auteurs : Aurora Benaiges, Auteur ; R. Armengol, Auteur ; B. Mateu, Auteur ; M. L. Sagrista, Auteur ; M. Mora, Auteur Année de publication : 2000 Article en page(s) : p. 13-17 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.5 Parfums et cosmétiques Résumé : This work presents the studies to develop an in-vitro method for observation and evaluation of the cutaneous metabolism using oxygen consumption measurements. The method was tested on two cellular models, hepatic mitochondria and human skin fibroblasts. The results show that the measurement of oxygen consumption is a suitable procedure for the in-vitro study of the cutaneous metabolism and may be used as a tool in the evaluation of the effectiveness of cosmetic actives. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10839 [article]

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Factors influencing efficacy of oil-dipersed physical sunscreens / Julian P. Hewitt in IFSCC MAGAZINE, Vol. 3, N° 1 (01-02-03/2000)

[article]  inIFSCC MAGAZINE > Vol. 3, N° 1 (01-02-03/2000) . - p. 18-23 Titre : Factors influencing efficacy of oil-dipersed physical sunscreens Type de document : texte imprimé Auteurs : Julian P. Hewitt, Auteur ; John Woodruff, Auteur Année de publication : 2000 Article en page(s) : p. 18-23 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.5 Parfums et cosmétiques Résumé : Introduction : Inorganic oxides are now well-established as active components for sunscreen products. Titanium dioxide (TiO2) has proven to be an effective UVB attenuator, facilitating formulation of high SPF products with a single sunscreen active. Zinc oxide complements TiO2 in that, while it has relatively low efficacy in the UVB, it attenuates well into the UVA region, providing broad spectrum protection. These physical sunscreens are available as hydrophobic or hydrophilic powders, or as oil-based or water-based dispersions. They can therefore be incorporated into almost any form of sun protection product; in emulsions, the most common form, TiO2 and/or ZnO can be incorporated into either the oil phase or the water phase of the emulsion. This paper is concerned with the factors which influence the efficacy of titanium dioxide, when incorporated into the oil phase of a sunscreen emulsion. Note de contenu : - Theoretical background - Particle size distribution - Coating of the particle - Powder or dispersion? - The influence of formulation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10842 [article]

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Histamine-induced melanogenesis : biochemical evidence and application of "Kakyoku (Pyracantha fortuneana) extract" to undue pigmentation / Y. Takahaski in IFSCC MAGAZINE, Vol. 3, N° 1 (01-02-03/2000)

[article]  inIFSCC MAGAZINE > Vol. 3, N° 1 (01-02-03/2000) . - p. 24-28 Titre : Histamine-induced melanogenesis : biochemical evidence and application of "Kakyoku (Pyracantha fortuneana) extract" to undue pigmentation Type de document : texte imprimé Auteurs : Y. Takahaski, Auteur ; M. Yoshida, Auteur ; T. Shinomiya, Auteur ; S. Inoue, Auteur Année de publication : 2000 Article en page(s) : p. 24-28 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.5 Parfums et cosmétiques Résumé : Undue skin pigmentation frequently accompanies chronic or acute inflammation. Several inflammatory mediators have been examined for their ability to stimulate melanin synthesis in human melanocytes. Although histamine is ubiquitous as an inflammatory factor, its involvement in pigmentation remains obscure. We found that histamine induces melanin synthesis via H2 receptors on cultured human melanocytes. When histamine was added to human melanocytes, cell configuration was changed markedly associated with significant increase in tyrosinase activity and melanin contents. These stimulatory effects of histamine were suppressed by an H2 receptor antagonist, but not by for an H1 or H3 antagonist. Furtheremore, an H2 agonist induced morphological changes and increase in tyrosinase activity in human melanocytes. These findings suggested that histamine plays a physiological role in pigmentation because undue skin pigmentation induced by UV exposure, the prolonged process of wound healing, or continuous physical stimuli, was frequently associated with a concomitant increase in tissue histamine levels. Based on this in vitro evidence, here we also report the development of a new anti-stain cosmetic ingredient with antiallergic action which suppresses generation of histamine. In a screening, we found that an extract from "Kakyoku (Pyracantha fortuneana)", a Chinese plant, has a potent inhibitory activity against the histamine release from mast cells. It also had inhibitory effects on tyrosinase and superoxide anion production in a xanthine oxidase system. In topical application of Kakyoku extract to skin, the improvement of UVB-induced skin pigmentation was observed for 14 out of 20 healthy volunteers. In this study, histamine released by skin stimulation was shown to activate melanocytes, and possibly to induce undue skin pigmentation. In view of these findings, we developed a new ingredient for anti-stain cosmetics, Kakyoku extract, which alleviated UVB-induced skin pigmentation. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10843 [article]

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Experimentlly induced epidermal barrier perturbation : measurement of transepidermal water loss (TEWL) using the perfused bovine udder skin (BUS) model / Wolfgang F. Pittermann in IFSCC MAGAZINE, Vol. 3, N° 1 (01-02-03/2000)

[article]  inIFSCC MAGAZINE > Vol. 3, N° 1 (01-02-03/2000) . - p. 29-32 Titre : Experimentlly induced epidermal barrier perturbation : measurement of transepidermal water loss (TEWL) using the perfused bovine udder skin (BUS) model Type de document : texte imprimé Auteurs : Wolfgang F. Pittermann, Auteur ; Th. Gassenmeir, Auteur ; S. Nieveler, Auteur ; Thomas Förster, Auteur ; M. Kietzmann, Auteur Année de publication : 2000 Article en page(s) : p. 29-32 Langues : Anglais (eng) Tags : 'Bovine  Under  Skin  (BUS)  model'  'Natural  skin  barrier'  TEWL  'Oleic  acid'  Stripping  Irritation  Penetration Index. décimale : 668.5 Parfums et cosmétiques Résumé : This paper describes the measurement of the TEWL under in vitro conditions using the isolated perfused Bovine Under Skin (BUS) model. After perturbation of the skin barrier by application of pure oleic acid or graduation stripping an increase in TEWL as expected was determined. The penetration of pure oleic acid into the stratum corneum was proven. No cytotoxic or irritant effects were observed after an exposure period up to five hours. Note de contenu : Bibliogr. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10845 [article]

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