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Skin of african descent : biophysical and clinical characterization influence of age / Stéphane Diridollou in IFSCC MAGAZINE, Vol. 16, N° 2 (04-05-06/2013)
[article]
Titre : Skin of african descent : biophysical and clinical characterization influence of age Type de document : texte imprimé Auteurs : Stéphane Diridollou, Auteur ; Frédéric Flament, Auteur ; Jean de Rigal, Auteur ; Bernard Querleux, Auteur ; Bertrand Piot, Auteur ; Felicia Dixon-Parks, Auteur ; Roland Bazin, Auteur Année de publication : 2013 Article en page(s) : p. 93-99 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dermatologie
Etude in vivo
Etudes cliniques
Etudes comparatives
Peau
Peau -- analyse
Peau noire
Vieillissement cutanéTags : Peau 'Afro-américain' Caucasien 'Propriétés biophysiques' 'Caractérisation clinique' Ethnicité Atlas Age Index. décimale : 668.5 Parfums et cosmétiques Résumé : The Clinical and biophysical data on African skin, its specific features and effects of aging are rather sparse. Accordingly, we aimed to characterize skin of African descent (African American skin) versus Caucasian skin through biophysical and clinical investigations. Additionally, clinical changes in some skin features as a function of age are reported.
In a first study, in vivo biophysical experiments were performed on the skin of 130 African American and 80 Caucasian women aged 18 to 87 living in the U.S. They included determination of the skin microrelief, color and color evenness, sebaceous function, surface hydration, mechanical properties, and skin structures (epidermis, subepidermal non-echogenic band, dermal epidermal junction, papillary-dermis and dermis). A second study involved a larger cohort of 200 African American and Caucasian women, aged 18-87, who were split into twelve matched 5-year age groups, in order to record age-related changes. Standardized photographs of the face were taken, focusing on various skin features. These included eye bags, under eye wrinkles, crow's feet.
These studies revealed that most of these skin features are common to both the Caucasian and African American populations. Nevertheless, some features were more prominent in or specific to the African American population including
• thicker epidermis and dermal-epidermal junction,
• thicker papillary dermis,
• stronger mechanical properties,
• specific clinical signs such as less depth of vertical upper lip wrinkles and
• more hyperpigmetation as well as pig mentary growths.
Moreover, clinical results showed that expression lines and tissue sagging appear at a later age in this population.
In addition, African American and Caucasian atlases were developed that can be used as an objective tool to evaluate product effectiveness, compare as well as identify the best products, and support efficacy claims.Note de contenu : - EXPERIMENTAL : Study 1 - Biophysical measurements - Color heterogeneity - Sebaceous function - Thickness of the dermal-epidermal junction and epidermis - Study 2 - Clinical
- RESULTS AND DISCUSSION : Biophysical measurements - Clinical evaluationPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18785
in IFSCC MAGAZINE > Vol. 16, N° 2 (04-05-06/2013) . - p. 93-99[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15157 - Périodique Bibliothèque principale Documentaires Disponible Skin pH assessment for sensitive skin claims / Christiane Uhl in GLOBAL PERSONAL CARE, Vol. 24, N° 4 (04/2023)
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Titre : Skin pH assessment for sensitive skin claims Type de document : texte imprimé Auteurs : Christiane Uhl, Auteur ; Lorette van't Hoff, Auteur Année de publication : 2023 Article en page(s) : p. 96-99 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dermatologie
Peau -- analyse
pH -- Mesure
Sensibilité cutanéeIndex. décimale : 668.5 Parfums et cosmétiques Résumé : This article looks at how to achieve effective a detailed overview of the exact state of the skin.
Specific amounts of water and lipids on the skin surface determine the composition of the hydrolipidic film of the skin. The various functions of sebum and moisture on the skin surface to keep it supple, flexible and healthy have been investigated from the beginning in the cosmetic industry.
The slightly acidic pH-value of the hydrolipidic film is a major protective factor for the skin, buffering acids and alkaline products that get in contact, as well as providing an environment favourable to our natural microbiome, at the same time restricting the growth of pathogenic microbes.
The term ‘acid mantle’ describing this aspect was first used in 1928 by Heinrich Schade and Alfred Marcchioni.1 Today, due to further technical developments and continuous research in dermatology and skin physiology, biochemistry, immunology and genetics, we know that the acidic skin pH value is involved in many more functions.
The pH value of the skin is influenced by different endogenic factors such as genetic disposition, age, gender, health, melanin content and sebum secretion. It is easily impacted by external influences, especially cleansing and care products, temperature (sweat) and relative humidity (moisture).Note de contenu : - The skin’s microbiome and pH value go hand in hand
- The importance of local pH value
- Easy and quick pH measurementEn ligne : https://drive.google.com/file/d/1DQTXFxN78Zn5NvLACL27CFOZZKrcBfQz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39418
in GLOBAL PERSONAL CARE > Vol. 24, N° 4 (04/2023) . - p. 96-99[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23938 - Périodique Bibliothèque principale Documentaires Disponible Skin photoaging in young men : A clinical study by skin imaging technique / Victor Hugo Pacagnelli Infante in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° 3 (06/2021)
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Titre : Skin photoaging in young men : A clinical study by skin imaging technique Type de document : document électronique Auteurs : Victor Hugo Pacagnelli Infante, Auteur ; Ediléia Bagatin, Auteur ; Patricia Maria Berardo Gonçalves Maia Campos, Auteur Année de publication : 2021 Article en page(s) : p. 341-351 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dermatologie
Etudes cliniques
Microscopie confocale
Peau -- analyse
Peau -- Anatomie
Peau -- Physiologie
Peau masculine
Photovieillissement (dermatologie)
Produits antisolaires
Vieillissement cutanéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Differences in skin physiology and lifestyle among people can influence the skin damage caused by solar radiation. Photoprotection habits play an important role to prevent skin photoaging. Thus, the objective of the present study was to evaluate the skin changes resulting from solar exposure in young men by skin imaging techniques.
- Methods : Twenty-three male, aged 18–28 years, with and without photoprotection habits participated in the study. Instrumental measurements in terms of dermis thickness and echogenicity (20 mHz ultrasound – DermaScanC®), morphological and structural skin characterization (Reflectance Confocal Microscopy – VivaScope® 1500) and high-resolution imaging (Visioface®) were performed in the malar region of the face.
- Results : Pigmentation disorders, telangiectasia, wrinkles and lower dermis echogenicity were observed in the skin of subjects without photoprotection habits. Reflectance Confocal Microscopy images showed an irregular honeycomb pattern (35%), polycyclic papillae (40%) and coarse collagen fibres (35%), which are related to photoaging.
- Conclusion : Sun exposure without photoprotection results in a loss of dermal echogenicity and changes in the epidermis structure and collagen fibres regardless of chronological age. Thus, the study adds data for a discussion about correct photoprotection habits among young people and can help to increase the use of sunscreens for male public.Note de contenu : - CASUISTIC AND METHODS : Subjects - Sun protection habits and interviews - Evaluation of skin visual characteristics by high-resolution - Dermis echogenicity and thickness imaging - Reflectance Confocal Microscopy –RCM - Statistical analysis
- RESULTS : Sun protection habits and cultural aspects - Evaluation of skin visual characteristics by high-resolution - Dermis echogenicity - Epidermis and papillary dermis morphology by RCM imaging
- Table 1 : Information about skin characteristics of study participants and the obtained results in the visual evaluation by medical doctor and reflectance confocal microscopy imaging analysisDOI : https://doi.org/10.1111/ics.12701 En ligne : https://drive.google.com/file/d/1Esg6EmFpTF0xy8kTiRkRmv-ev0Y1sLvR/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35901
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 43, N° 3 (06/2021) . - p. 341-351[article]Structure of skin in collagenous fibres : crossbreeds from black-and-white-cows X bulls of beef breeds / Piotr Zapletal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 6 (11-12/2001)
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Titre : Structure of skin in collagenous fibres : crossbreeds from black-and-white-cows X bulls of beef breeds Type de document : texte imprimé Auteurs : Piotr Zapletal, Auteur ; J. Szarek, Auteur ; A. Weglarz, Auteur Année de publication : 2001 Article en page(s) : p. 207-210 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bovins -- Races
Collagène -- Analyse
Croisement de races
Cuirs et peaux de bovins
Peau -- analyse
Peau -- HistologieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The aim of this study was to define the effect of crossing Black-and-White (CB) cattle with Italian beet' breeds (Piemontese-P. Marchigiana-M and Chianina-.Ch) and with Aberdeen Angus (AA) breed as well as that of pure Black-and—White breed with AA and Simmental (S) bulls, on the histological structure of skin tissue and properties of the collagen fibres. Knowledge of the arrangement and structure of' collagen fibres of the studied skins may be helpful in choosing the correct technological process for their dressing, or in developing a new one which would result in a better utilisation of raw material.
It can be stated that analysis of’ photographs of skin tissue under scanning electron microscopy (SEM) corresponds with the results of fibre measurements conducted under a light microscope. Skin tissue of bulls (CB x P) x AA and CB x AA showed the smallest spacing between the bundles of collagen fibres. The largest number of fibres in a bundle was contained in the skins of crossbreeds (CB x M) x AA and (CB x P) x AA. In contrast. the skins of S and (CB x Ch) x AA. crossbreeds (CB x M) x AA and (CB x P) x AA were characterised by a largest number of fine fibres in a bundle. Based on an organoleptic assessment the latter skin tissue displayed higher fineness and softness as well as better elasticity.
The thickness of the collagen fibres was relatively greater in the skins of those breed groups. which were characterised by a smaller number of fibres in a bundle. A high content of collagen in the skin of Simmental and CB x S bulls is indicative of its extended structure and denser network.Note de contenu : - Table 1 : Selected parameters of skin histological structure
- Table 2 : Selected parameters of skins ultrastruktural structure (scanning microscope)En ligne : https://drive.google.com/file/d/14rMlnaSUXfvi5a20zck_Strc8pn1HjBR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40215
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 6 (11-12/2001) . - p. 207-210[article]Study design for anti-pollution claims / Fabrice Perin in PERSONAL CARE EUROPE, Vol. 11, N° 4 (09/2017)
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Titre : Study design for anti-pollution claims Type de document : texte imprimé Auteurs : Fabrice Perin, Auteur ; Céline Blanché, Auteur Année de publication : 2017 Article en page(s) : p. 67-69 Langues : Anglais (eng) Catégories : Etude in vitro
Etude in vivo
Evaluation
Peau -- analyse
Peau -- Effets de la pollution atmosphérique
Peau -- Nettoyage
Peau -- Soins et hygiène
Polluants atmosphériques
Tests d'efficacitéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : This review has briefly discussed the rationale behind anti-pollution testing of cosmetic products, and presented some examples of pollution models as well as in vitro and in vivo tests. It is reasonable to assume that in vitro methods are used primarily as proof of concept to investigate and/or confirm the biological mechanism involved in the anti-pollution effect claimed of new ingredients, whereas in vivo tests are more interesting from the perspective of gathering data to support claims of finished cosmetic products. This article focused on methods usable for the evaluation of products applied on the skin. But it should not be forgotten that anti-pollution tests dedicated to hair care products are also available. To conclude with some perspectives, in the future it is likely that metabolomics, a relatively recent approach which deals with the analysis of metabolites present in biological samples combined with statistical analysis, has the potential to investigate profile variations in metabolites concentrations after exposure to pollutants. Metabolomics will certainly be extremely useful to investigate the impact of environmental pollutants on skin metabolism. And it will also be a new tool to demonstrate the effect of anti-pollution skin treatments. Note de contenu : - Design a study
- Fig. 1. Application of artificial dirt for the assessment of the efficacy of a cleansing treatment
- Fig. 2. Evaluation by a trained assessor of the radiance of the facial complexion using the CLBT methodEn ligne : https://drive.google.com/file/d/12Ccqq8Jen00TkecuQdqP4UIygGTMSgpT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29324
in PERSONAL CARE EUROPE > Vol. 11, N° 4 (09/2017) . - p. 67-69[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19098 - Périodique Bibliothèque principale Documentaires Disponible Study for skin gloss perception using computer modulation and frequency separation on surface reflection in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 4 (08/2023)
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PermalinkTexture-based characterization of subskin features by specified laser speckle effects at λ = 650 nm region for more accurate parametric 'skin age' modelling / Ahmet B. Orun in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 3 (06/2017)
PermalinkPermalinkThe roughness of lip skin is related to the ceramide profile in the stratum corneum / Eiko Tamura in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 38, N° 6 (12/2016)
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PermalinkTopical niacinamide enhances hydrophobicity and resilience of corneocyte envelopes on different facial locations / Rainer Voegeli in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 6 (12/2020)
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PermalinkPermalinkUltrastructural observations of skin samples obtained from various parts of animal and human body / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
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PermalinkUltrastructural observations of skin samples obtained from various parts of animal and human body / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 1 (01-02/1977)
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PermalinkUV reflectance photography of skin : what are you imaging ? / Jonathan M. Crowther in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 2 (04/2020)
PermalinkWater retention of treated stratum corneum measured by a coupling method : thermal desorption-mass spectrometry / A. Gournay in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 17, N° 4 (08/1995)
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