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Continuous three-dimensional examination of interior hair structure / Ken-ichi Tanaka in IFSCC MAGAZINE, Vol. 8, N° 1 (01-02-03/2005)

[article]  inIFSCC MAGAZINE > Vol. 8, N° 1 (01-02-03/2005) . - p. 3-8 Titre : Continuous three-dimensional examination of interior hair structure Type de document : texte imprimé Auteurs : Ken-ichi Tanaka, Auteur ; Yutaka Tango, Auteur ; Koichi Shimmoto, Auteur Année de publication : 2005 Article en page(s) : p. 3-8 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Structure  intérieure  du  cheveu'  'Essai  non-destructif'  Tomographie  'Couleur  Polychromie Index. décimale : 668.5 Parfums et cosmétiques Résumé : The ability to continuously examine the interior hair structure throughout a treatment process is very important in designing effective hair products. Microscopy is commonly used to observe the interior of hair, but this method requires a sliced sample, making continuous observation impossible. Use of X-ray computed tomography (CT) as a non-destructive measurement has been proposed, but this method has a disadvantage in that it is impossible to obtain full-color interior images of the sample. Thus, a non-destructive method for continuous, full-color examination of the interior hair structure has been lacking. In this study a new method is proposed that enables non-destructive and continuous measurement of the interior hair structure with color information. In our method, optical CT is used for reconstruction of the interior hair structure. Our new theories enabled us to solve the crucial problem of the large observational error of traditional optical CT systems caused by internal light scattering and to make its practical application possible. A new optical CT system based on our method was implemented. This system displayed sufficient accuracy when the phantom image was measured, and clear and full-color cross-sectional images were obtained without destruction of the sample when human hair was observed. When the bleaching and dyeing processes were continuously measured, changes in the interior hair with time could be observed. These results clearly indicate that our new method provides a powerful tool for research and product development. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10461 [article]

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Compatibility testing of colored cosmetics – A new tool for objective testing near infrared remission spectroscopy (NIR-RS) / M. Rohr in IFSCC MAGAZINE, Vol. 8, N° 1 (01-02-03/2005)

[article]  inIFSCC MAGAZINE > Vol. 8, N° 1 (01-02-03/2005) . - p. 11-15 Titre : Compatibility testing of colored cosmetics – A new tool for objective testing near infrared remission spectroscopy (NIR-RS) Type de document : texte imprimé Auteurs : M. Rohr, Auteur ; Nikolai Ernst, Auteur ; Annika Schrader, Auteur Année de publication : 2005 Article en page(s) : p. 11-15 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques -- Effets physiologiques Erythèmes Produits de beauté Spectroscopie infrarouge proche Tags : 'NIR-RS'  'Spectroscopie  infrarouge  proche'  UVB  'Compatibilité  de  la  peau'  Bioingénierie  'Réaction  érythémateuse'  'Bande  Rémission-absorption' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Previous methods for skin compatibility testing of colored cosmetics were limited by their ability to detect erythema reactions (reddening) underneath non-transparent products. The objective of this study is to present a new spectroscopic method to quantify reddening of human skin in vivo below colored cosmetics (e.g. hair dye, lipstick, makeup). The skin compatibility of non-transparent cosmetic products was determined by detection of a remission band in the near-infrared spectral region. In this study a spectrophotometer with a short arc xenon lamp and a single monochromator on the excitation side as well as an emission monochromator with a near-infrared photodiode (NIR photodiode) on the detection side was used. To induce an erythema reaction different test areas were treated with a 1 molar solution of ammonia. Afterwards they were colored with a permanent oxidative hair dye or lipstick. Before the coloring procedure, the baseline state of the test areas was documented by measuring the remission in the range from 1050 nm to 1250 nm. This measurement was repeated after the erythema reaction had been covered by a colored cosmetic. The results of data analysis revealed a remission band at approximately 1150 nm that was directly linked to the intensity of the erythema reaction. Non-visible reddening of the skin thus becomes measurable with this new method regardless of the optical properties of the product tested. Get PDF (52K) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10462 [article]

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Anti-wrinkle therapy : significant new findings in the non-invasive cosmetic treatment of skin wrinkles with beta-glucan / Ravi Pillai in IFSCC MAGAZINE, Vol. 8, N° 1 (01-02-03/2005)

[article]  inIFSCC MAGAZINE > Vol. 8, N° 1 (01-02-03/2005) . - p. 17-21 Titre : Anti-wrinkle therapy : significant new findings in the non-invasive cosmetic treatment of skin wrinkles with beta-glucan Type de document : document électronique Auteurs : Ravi Pillai, Auteur ; M. Redmond, Auteur ; J. Röding, Auteur Année de publication : 2005 Article en page(s) : p. 17-21 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption cutanée Antiâge:Antirides Cosmétiques Glucanes Un glucane est un polysaccharide (polymère d'oses) composé exclusivement de monomère de glucose. Ils peuvent être linéaires ou bien ramifiés. Index. décimale : 668.5 Parfums et cosmétiques Résumé : Oat beta-glucan is a water soluble, linear polymer of glucose consisting of 1,4 (70%) and 1,3 (30%) linkages with an average molecular weight of 1 × 106 Da. Scientific reports indicate beta-glucan is a film-forming moisturizer, a biological response modifier, and a promoter of wound healing. Our objective was to study the penetration of oat (1,4:1,3) beta-glucan in human skin models and to evaluate clinically its efficacy for reducing fine-lines and wrinkles. Penetration studies performed on human abdominal skin used a single application of 0.5% beta-glucan solution at a dose of 5 mg per cm2. The results showed that beta-glucan, despite its large molecular size, deeply penetrated the skin into the epidermis and dermis. A clinical study of 27 subjects was performed to evaluate the effects of beta-glucan on facial fine-lines and wrinkles. After 8 weeks of treatment, digital image analysis of silicone replicas indicated a significant reduction of wrinkle depth and height, and overall roughness. This work is the first ex vivo and in vivo demonstration of the physiological effects of beta-glucan in the penetration and restructuring of human tissue. The study supports the use of oat beta-glucan in the care and maintenance of healthy skin and the cosmetic treatment of the signs of aging. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10463 [article]

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Tracking intersensory properties of cosmetic products via psycho-physiological assessment / W. Eisfeld in IFSCC MAGAZINE, Vol. 8, N° 1 (01-02-03/2005)

[article]  inIFSCC MAGAZINE > Vol. 8, N° 1 (01-02-03/2005) . - p. 25-30 Titre : Tracking intersensory properties of cosmetic products via psycho-physiological assessment Type de document : texte imprimé Auteurs : W. Eisfeld, Auteur ; F. Schaefer, Auteur ; W. Boucsein, Auteur ; Carolin Stolz, Auteur Année de publication : 2005 Article en page(s) : p. 25-30 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle Cosmétiques Parfums Tags : Couleur  Parfum  'Interdépendance  des  sens'  'Combinaisons  assorties/mal  adaptées'  'Technique  principale  d'investigation'  'Evaluation  émotive  objective' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Intersensory phenomena frequently occur during the subjective assessment of consumer products and are very difficult to measure properly in an objective way. In earlier studies, the objective emotional assessment (OEA) technique based on the evaluation of psycho-physiological reactions and parameters had proven to be highly suitable for determining emotional consumer response. The aim of the present study was to assess the intersensory effects of color and scent via OEA. The experiment was designed in a way that matched combinations of color and fragrance were compared with apparently mismatched combinations in transparent gels. A special apparatus was constructed for presentation of the various stimuli to the volunteers. Furthermore, the order of stimuli presentation was varied according to a prime-probe concept. Data analysis was carried out with multivariate statistics, which allowed identification of characteristic discriminant functions for thevarious experimental conditions and interpretation of their practical meaning in a straightforward way. In summary, we found that OEA could be successfully applied to such weak stimuli as color and scent and there was a good differentiation of matched and mismatched combinations with respect to their activation and emotional effect on volunteers. A very subtle separation of stimuli was achieved, which allows deep insight into the mutual interdependency of color and scent. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10464 [article]

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Laurel wax as a new natural cosmetic raw material : characterization, stability, sensorial studies and safety evaluation / John Jiménez in IFSCC MAGAZINE, Vol. 8, N° 1 (01-02-03/2005)

[article]  inIFSCC MAGAZINE > Vol. 8, N° 1 (01-02-03/2005) . - p. 33-41 Titre : Laurel wax as a new natural cosmetic raw material : characterization, stability, sensorial studies and safety evaluation Type de document : texte imprimé Auteurs : John Jiménez, Auteur ; Lilian García, Auteur ; Jairo Calle, Auteur Année de publication : 2005 Article en page(s) : p. 33-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle Caractérisation Cire de laurier Cosmétiques Diversité biologique Durée de vie (Ingénierie) Matières premières Myristique, Acide Palmitique, Acide Rouges à lèvres Index. décimale : 668.5 Parfums et cosmétiques Résumé : Colombia has the third greatest biodiversity in the world and many plants have yet to be studied. Laurel wax is obtained from the fruit of Myrica pubescens, a small tree that can be found in some rural zones in the Nariño department. The main objective of this investigation is to contribute to the development of sustainability of the communities that produce laurel wax in Colombia by proposing possible uses in personal care products. This work involves: 1. Determining the physicochemical properties of wax obtained from the fruit of Myrica pubescens, which is known in the region as laurel wax, 2. Proposing applications and uses of this wax in personal care products on the basis of the results of comparative stability and sensory studies with other natural waxes. 3. Performing a safety evaluation using the Het-Cam test and thereby avoiding animal experiments. Emulsions and color cosmetics can be developed with laurel wax. Replacement of beeswax with laurel wax in lipsticks was studied using analytical sensory techniques with the help of a trained panel; this change improved the slipperiness and uniformity. According to a safety evaluation based on the Het-Cam test, laurel wax should not be an irritant in vivo. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10465 [article]

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