3D laser scanning confocal microscopy of siloxane-based comb and double-comb polymers in PVDF-HFP thin films / Eva Cznotka in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 4 (07/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 4 (07/2016) . - p. 577-587 Titre : 3D laser scanning confocal microscopy of siloxane-based comb and double-comb polymers in PVDF-HFP thin films Type de document : texte imprimé Auteurs : Eva Cznotka, Auteur ; Steffen Jeschke, Auteur ; Sebastian Schmohl, Auteur ; Patrik Johansson, Auteur ; Hans-Dieter Wiemhöfer, Auteur Année de publication : 2016 Article en page(s) : p. 577-587 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Hexafluoropropylène Microscopie confocale à balayage laser Polyélectrolytes Polyfluorure de vinylidène Polymères ramifiés Index. décimale : 667.9 Revêtements et enduits Résumé : Currently, atomic force microscopy is the preferred technique to determine roughness on membrane surfaces. In this paper, a new method to measure surface roughness is presented using a 3D laser scanning confocal microscope for high-resolution topographic analysis and is compared to conventional SEM. For this study, the surfaces of eight samples based on a poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) host polymer with different liquid interpenetrating components were analyzed. Polymethylhydrosiloxane, triethylene glycolallylmethylether, (3,3,3-trifluoropropyl)methylcyclotrisiloxane (D3-C2H4CF3), polysiloxane-comb-propyloxymethoxytriglycol (PSx), polysiloxane-comb-propyl-3,3,3-trifluoro (PSx-C2H4CF3), poly[bis(2-(2-methoxyethoxy) ethoxy) phosphazene, or poly[bis(trifluoro)ethoxy] phosphazene was chosen as interpenetrating compound to investigate the impact of comb and double-comb-structured polymer backbones, as well as their dipolar or fluorous residues on the PVDF-HFP-miscibility. Different phases of the constituting ingredients were identified via their thermal properties determined by DSC. Additionally, the COSMO-RS method supported the experimental results, and with regard to computed σ-profiles, new modified structures for polysiloxane and polyphosphazene synthesis were suggested. Note de contenu : - EXPERIMENTAL : Materials - Polymer synthesis - Membrane preparation - Characterization methods - Computational details - RESULTS AND DISCUSSION : 3D laser scanning confocal microscopy - Scanning electron microscopy - DSC - COSMO-RS profiles and potentials DOI : 10.1007/s11998-015-9754-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9754-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26739 [article]

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An innovative, rapid, qualitative and quantitative approach to the epidermal barrier function with in vivo confocal laser scanning microscopy / Anne Isabel Guzman in IFSCC MAGAZINE, Vol. 16, N° 3 (07-08-09/2013)

[article]  inIFSCC MAGAZINE > Vol. 16, N° 3 (07-08-09/2013) . - p. 157-163 Titre : An innovative, rapid, qualitative and quantitative approach to the epidermal barrier function with in vivo confocal laser scanning microscopy Type de document : texte imprimé Auteurs : Anne Isabel Guzman, Auteur ; David Boudier, Auteur ; Josselin Breugnot, Auteur ; Delphine Rondeau, Auteur ; Maud Le Guillou, Auteur ; Brigitte Closs, Auteur Année de publication : 2013 Article en page(s) : p. 157-163 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Barrière cutanée Cosmétiques Evaluation Hydratation Imagerie médicale Imagerie numérique Microscopie confocale à balayage laser Peau -- Soins et hygiène Index. décimale : 668.5 Parfums et cosmétiques Résumé : The barrier function of the skin is essential for maintaining the hydration and physical properties of skin tissue. Its state can be assessed using noninvasive instrumental methods widely used in cosmetics, such as the Tewameter®. This method is very simple to use but does not provide information on the state of the skin, in particular on the state of the stratum corneum and its cellular organization, and does not visualize the skin surface. However, many noninvasive medical imaging techniques used on the skin provide more precise information on this organ. In the work reported here, we show that modeling based on acquisitions from in vivo confocal laser scanning microscopy provides high resolution digital images that can be used to assess the state of the skin surface and the integrity of the barrier function. The numerical results obtained correlate well with those obtained using the Tewameter® and therefore validate this qualitative, rapid and quantitative approach to the assessment of barrier function. This novel approach was used to screen and assess natural cosmetic active ingredients in order to determine their effect on restoration of the barrier function of the skin. Note de contenu : - EXPERIMENTAL : Measuring TEWL - Confocal microscopy acquisitions - Image processing and programming - Study of correlation - RESULTS : Measurement of transepidermal water loss - Quantitative confocal microscopy study - Changes in cell organization over time - Correlation between transepidermal water loss and cellular organization - DISCUSSION : Image processing and programming - Quantification of images by experts Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19304 [article]

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"Biopsie" optique : une évaluation in vivo non invasive de la peau / Giovanni Pellacani in EXPRESSION COSMETIQUE, N° 11 (09-10/2011)  

[article]  inEXPRESSION COSMETIQUE > N° 11 (09-10/2011) . - p. 110-116 Titre : "Biopsie" optique : une évaluation in vivo non invasive de la peau Type de document : texte imprimé Auteurs : Giovanni Pellacani, Auteur ; Caterina Longo, Auteur Année de publication : 2011 Article en page(s) : p. 110-116 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Microscopie confocale à balayage laser Peau -- Anatomie et histologie Vieillissement cutané Index. décimale : 612.7 Fonctions motrices et peau (tégument), cheveux et poils, ongles Résumé : La Microscopie Confocale à Balayage Laser (MCBL) ouvre une "fenêtre sur la peau" et permet de représenter horizontalement les différentes structures cutanées, étape par étape avec une précision microscopique et une résolution cellulaire. Cet article offre un aperçu de l'utilisation des images confocales et compare la peau de visage normale et âgée. En ligne : https://drive.google.com/file/d/1F7olQ7KcYo5Pc0vNNNIc09aCew8tsU6U/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12788 [article]

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Confocal microscopy techniques for coatings research / Wenjun Wu in COATINGS TECH, Vol. 16, N° 5 (05/2019)  

[article]  inCOATINGS TECH > Vol. 16, N° 5 (05/2019) . - p. 34-45 Titre : Confocal microscopy techniques for coatings research : Surface and depth characterization of latex paint films Type de document : texte imprimé Auteurs : Wenjun Wu, Auteur ; Dana Garcia, Auteur ; Jeffrey Schneider, Auteur Année de publication : 2019 Article en page(s) : p. 34-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Copolymère styrène acrylique Latex Microscopie confocale à balayage laser Nettoyabilité Résistance aux taches Revêtements -- Analyse:Peinture -- Analyse Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne coatings are multi-component, heterogeneous systems containing a variety of additives, in addition to water, polymer binders, and pigment particles. The distribution of various ingredients in the coating films directly affects a coating’s appearance and performance ; for example, optical properties, substrate adhesion, chemical resistance, and mechanical durability. Over the years, a plethora of analytical tools have been utilized in coatings characterization and defect identification. Microscopy and vibrational spectroscopy are complementary techniques and the combination of the two can provide the most complete information regarding the distributions of different coatings ingredients, as well as the fate and the impact of liquids or particulates that come into contact with the dried coating films. Note de contenu : - EXPERIMENTAL - MATERIALS : Latex and paint samples - Fluorescence of concord grape juice - Confocal Raman microscopy - Confocal laser scanning microscope techniques - Stain resistance and washability - RESULTS AND DISCUSSION : Example 1 : spatial distribution of styrenated additive in acrylic paint films - Example 2 : Surfactant enrichment on paint film surface - - Example 3 : Characterization of stain resistance, stain penetration, and stain removal : Selection of representative staining material and paint samples - Vizualization and quantification of stain penetration using CLSM - Characterization of stain adsorption, penetration and removal using CRM - Fig. 1 : Raman spectra of Paint I-SA film - Fig. 2 : Raman spectra of Paint I-SA film: 4000~800 cm1 - Fig. 3 : Depth attenuation of TiO2 and styrene (20X) bands in Paint I-SA film - Fig. 4 : Raman intensity ratios of styrene to acrylic in Paint I-SA film - Fig. 5 : Raman spectra of Paint I film : 4000~800 cm1 - Fig. 6 : 2nd derivatives of Raman spectra for Paint I film before (6a) and after water rinse (6b) - Fig. 7 : Fluorescence emission spectrum of Welch’s Concord grape juice diluted in water - Fig. 8 : Stain removal or washability performance of Paint I and Paint II - Fig. 9 : Fluorescence images of acrylic polymer AP2 film (blue) stained by grape juice - Fig. 10 : Fluorescence images of grape juice-stained AP2 film after sponge wash using Formula 409 - Fig. 11 : Raman spectrum of partially dried grape juice - Fig. 12 :Fluorescence emission and unshifted Raman spectra of Concord grape juice - Fig. 13 : Grape juice-stained and unstained surface spectra of Paint I films - Fig. 14 : Spectra of unstained and grape juice-stained Paint I (14a) and Paint II (14b) - Fig. 15 : Difference in discoloration of Paint I and Paint II surfaces by grape juice - Fig. 16 : Effect of staining time on Paint I (16a) and Paint II (16b) surfaces - Fig. 17 : Discoloration or color change as a function of grape juice residence time - Fig. 18 : Effect of washing procedure: sponge wash vs water rinse En ligne : https://drive.google.com/file/d/10cF15960T-Isv7D7D5OMH6daBGCNj1GG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32559 [article]

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Effect of tio2 pigment type on the uv degradation of filled coatings / Deborah L. Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 1 (01/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 1 (01/2011) . - p. 19-33 Titre : Effect of tio2 pigment type on the uv degradation of filled coatings Type de document : texte imprimé Auteurs : Deborah L. Wang, Auteur ; Stephanie S. Watson, Auteur ; Li-Piin Sung, Auteur ; I-Hsiang Tseng, Auteur ; Craig J. Bouis, Auteur ; Raymond Fernando, Auteur Année de publication : 2011 Article en page(s) : p. 19-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de titane Fourier, Spectroscopie infrarouge à transformée de Microscopie confocale à balayage laser Photodétérioration Pigments photoréactifs Polymères -- Effet du rayonnement ultraviolet Polymères -- Détérioration Revêtements -- Détérioration Index. décimale : 667.9 Revêtements et enduits Résumé : The objective of this study was to investigate the effect of the photoreactivity of titanium dioxide (TiO2) pigments on the photodegradation of polymeric coatings used in exterior applications. Two polymer matrices, an amine-cured epoxy (EP) and an acrylic urethane (AU), containing three types of TiO2 pigments, classified by different levels of photoreactivity, were studied. Specimens were exposed on an ultraviolet (UV) weathering chamber, the Simulated Photodegradation by High Energy Radiant Exposure device at the National Institute of Standards and Technology. Two exposure conditions were used: ambient, dry condition [25°C and 0% relative humidity (RH)] and high temperature, wet condition (55°C and 75% RH), which is similar to more severe outdoor exposures. The physical and chemical degradations of the filled coatings were monitored at periodic intervals using a combination of laser scanning confocal microscopy (LSCM) and attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR). Progression of degradation on the coating surfaces was characterized by LSCM in terms of changes in surface roughness and morphology, pigment agglomerate size, and the occurrence of pits or holes in the coatings. The observed physical changes were correlated to the chemical changes measured by ATR-FTIR as a function of UV exposure time. Both EP and AU systems showed less degradation in terms of surface roughness and morphological changes under the dry conditions compared to the wet exposure conditions. It was observed that both the pigment type (and hence photoreactivity) and particle dispersion strongly affected the degradation of both EP and AU systems. DOI : 10.1007/s11998-009-9216-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9216-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10919 [article]

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Effects of eczema calming lotion on the stratum corneum in atopic dermatitis : Corneodesmosin and intercellular lipid lamellae / Hilal Ilarslan in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 46, N° 4 (08/2024)  

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Enlarged rete pegs with excessive accumulation of melanosomes leading to darker aging spots revealed by histomorphological measurements of internal structures of the epidermis / Tatsuo Yamamura in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 3 (06/2023)  

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In vivo methods for the analysis of the penetration of topically applied substances in and through the skin barrier / Jürgen Lademann in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 6 (12/2012)  

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A macroscopically nondestructive method for characterizing surface mechanical properties of polymeric coatings under accelerated weathering / Ching-Hsuan Chang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)  

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Mobile connected dermatoscope and confocal laser scanning microscope : a useful combination applied in facial simple sensitive skin / Weimin Song Zha in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 4 (08/2012)  

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Penetration pattern of rhodamine dyes into enamel and dentin : confocal laser microscopy observation / S. R. Kwon in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 1 (02/2012)  

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