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Titre : Mesures et tests cosmétiques : quelles avancées ? Type de document : texte imprimé Auteurs : Rachida Nachat-Kappes, Auteur Année de publication : 2019 Article en page(s) : p. 54-58 Langues : Multilingue (mul) Catégories : Analyse spectrale
Cosmétiques -- Analyse
Essais (technologie)
Facteur de protection solaire
Imagerie (technique)
MesureIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Coorganisé par la Cosmetic Valley et l'Université de Cergy-Pontoise, le congrès COMET, dédié aux mesures et aux tests cosmétiques, a eu lieu, pour la troisième fois, les 6 et 7 février. Plus de 250 participants ont fait le déplacement afin de se mettre à jour sur les nouvelles technologies et stratégies d'évaluation. Note de contenu : - Innovation dans les systèmes d'administration
- Nouvelle méthodologie pour évaluer le FPS
- Outils spectrométriques pour l'évaluation de la pénétration de molécules actives
- Méthodes analytiques pour mieux caractériser la peau : Techniques séparatives - Techniques vibrationnelles - L'imagerie cellulaire CARS
- Evaluation sensorielle par microscopie confocale par réflectance (RCM)
- Evaluer l'efficacité des ingrédients avec des modèles originauxEn ligne : https://drive.google.com/file/d/1wZfvq0tAncuTauLwpDwwCILrmPqH4JNn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32628
in EXPRESSION COSMETIQUE > N° 57 (05-06/2019) . - p. 54-58[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20965 - Périodique Bibliothèque principale Documentaires Disponible Microwave-assisted preparation of pyrite and its sensitisation of titanium dioxide in self-cleaning aramid fabrics / Chenghui Zheng in COLORATION TECHNOLOGY, Vol. 134, N° 4 (08/2018)
[article]
Titre : Microwave-assisted preparation of pyrite and its sensitisation of titanium dioxide in self-cleaning aramid fabrics Type de document : texte imprimé Auteurs : Chenghui Zheng, Auteur ; Chang-E Zhou, Auteur ; Zhenming Qi ; Qingqing Zhou ; Chaoxia Wang Année de publication : 2018 Article en page(s) : p. 284-291 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Angle de contact
Bleu de méthylène
Caractérisation
Colorants -- Détérioration
Dioxyde de titane
Dispersions et suspensions
Fibre aramide
Micro-ondes
Photocatalyse
Photodétérioration
PyriteLa pyrite est une espèce minérale composée de disulfure de fer (FeS2), polymorphe de la marcassite ; elle peut contenir des traces de nickel (Ni), cobalt (Co), arsenic (As), cuivre (Cu), zinc (Zn), argent (Ag), or (Au), thallium (Tl), sélénium (Se) et vanadium (V).
Résistance au rayonnement ultraviolet
Textiles et tissus auto-nettoyants
Textiles et tissus synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Titanium dioxide (TiO2) dispersions were obtained by neutralising anatase nano‐titanium dioxide sols prepared by hydrolysing tetrabutyl titanate in acidic aqueous media. Pyrite was initially prepared via the microwave‐assisted method with a mixed solvent of ethylene glycol and small amounts of water, and was then used in sensitising micron‐sized titanium dioxide particles to obtain aramid fabrics with self‐cleaning properties. X‐ray diffraction demonstrated the crystalline structure of pyrite, and ultraviolet‐visible (UV‐vis) spectrum and energy‐dispersive X‐ray spectroscopy characterised the band gaps, surface status on fabrics and the distribution of the pyrite compound's titanium dioxide particles. The contact angle, UV protection factor (UPF) and photocatalytic degradation of methylene blue (MB) were used to evaluate the performance of treated aramid fabrics. Results show that pyrite‐sensitised titanium dioxide compounds obtained at pH 5 have smaller band gap energies and relatively poor wetting abilities, higher UPF values, and perform well in the photocatalytic degradation of MB. The pseudo‐first kinetic model was used to analyse elaborate sections of the curve for the degradation of MB. Note de contenu : - EXPERIMENTAL : Materials - Preparation of titanium dioxide dispersions - Preparation of pyrite - Treatment of aramid fabrics - Characterisation
- RESULTS AND DISCUSSION : X-ray diffraction - UV-vis diffuse spectra - EDS analysis - UPF - Contact angles - Photocatalytic degradation of MB
- Tables : 1. Contact angles of water droplets on aramid fabrics - 2. Pseudo-first kinetic parameters and half-life of the photocatalytic degradation of MBDOI : 10.1111/cote.12348 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12348 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30923
in COLORATION TECHNOLOGY > Vol. 134, N° 4 (08/2018) . - p. 284-291[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20089 - Périodique Bibliothèque principale Documentaires Disponible Molecular electronic spectroscopy : from often neglected fundamental principles to limitations of state-of-the-art computational methods / Heinz Mustroph in COLORATION TECHNOLOGY, Vol. 131, N° 1 (02/2015)
[article]
Titre : Molecular electronic spectroscopy : from often neglected fundamental principles to limitations of state-of-the-art computational methods Type de document : texte imprimé Auteurs : Heinz Mustroph, Auteur ; Steffen Ernst, Auteur ; Bianca Senns, Auteur ; Andrew D. Towns, Auteur Année de publication : 2015 Article en page(s) : p. 9-26 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Calcul
Colorants
Logiciels
Spectroscopie moléculaireIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The creation of the first synthetic dyes not only stimulated the hunt for new colorants but also drove the search for rules correlating the constitution of organic compounds with their colour. Dye chemistry additionally facilitated the development of molecular electronic spectroscopy as well as theories of molecular electronic structure and electronic transitions. Powerful quantum chemical computational tools are now available for the prediction of the electronic structure and spectroscopic characteristics of organic compounds. Such methods are thus useful in designing new functional colorants and aiding interpretation of their properties. However, without a deep appreciation of the principles and assumptions behind the calculations, one runs the risk of misunderstanding what can be achieved as well as becoming confused about how the outputted electronic and vibronic transition data correspond to observed absorption spectra. This review therefore aims to cover fundamentals of electronic spectroscopy that are often overlooked and enable the dye chemist using modern computational methods to comprehend the subtle differences in the types of transition energy value that such software can generate. In addition, the limitations of these methods in predicting absorption maxima and intensities of real-world colorants will be discussed in the context of physical influences on absorption band position and shape, for example from the perspective of different forms of the Franck–Condon principle. In essence, the goal of this review is to clarify, in terms that practical dye chemists will understand, what computational methods can predict and how valid these predictions are compared with reality. Note de contenu : - MOLECULAR ELECTRONIC SPECTROSCOPY : Electronic transition energy in atoms and molecules - some fundamentals - Calculation of electronic transition energies in molecules - Sources of disparity between calculated transition energies and experimental data - Intensity of electronic transitions in molecules - Absorption band shapes - the Franck-Condon principle DOI : 10.1111/cote.12120 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12120 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22968
in COLORATION TECHNOLOGY > Vol. 131, N° 1 (02/2015) . - p. 9-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16810 - Périodique Bibliothèque principale Documentaires Disponible Molecular interactions between type I collagen and metal complex : from computational modelling to experimental characterisation / Xiao Shiwei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)
[article]
Titre : Molecular interactions between type I collagen and metal complex : from computational modelling to experimental characterisation Type de document : texte imprimé Auteurs : Xiao Shiwei, Auteur ; Dan Nianhua, Auteur ; Wang Kangjian ; Juxia Gong ; Dan Weihua ; Hong Lin Année de publication : 2018 Article en page(s) : p. 174-180 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Analyse thermique
Caractérisation
Collagène
Complexes métalliques
Dynamique moléculaire
Microscopie
Modèles numériques
Morphologie (matériaux)
Stabilité thermique
ThermogravimétrieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Computational modelling was used to construct the models of type I collagen and the Zr-AI-Ti complex, as well as simulating the interactions between them. Hydrogen bond and Van der Waals' forces exist between collagen and the Zr-Al-Ti complex. Furthermore, other bonding regions between central metal ions and O, N, H atoms were calculated. Furthermore, experimental characterisations were carried out to better verify the results of computational modelling, results showed that the spectra of FTIR, UV-DRS and fluorescence were all shifted to some extent. Specifically, UV-DRS and fluorescence detection suggested that the alteration appeared around aromatic residues, tyrosine and phenylalanine. Further, XPS proved that the N atom showed a higher possibility of coordinating with the metal complex than did O. Accompanied with DSC and TG detections, it has been confirmed that the interactions brought by Zr-Al-Ti complex gave rise to the increase of denaturation temperature of collagen from 66.51°C to 88.1°C. In addition, results obtained from SEM and AFM show It is obvious that the original collagen fibre has been changed into a tight layer by layer structure, and it could be observed that metal complex particles filled in between collagen fibres ,this together with strong chemical bonding between them, finally stabilized the structure of collagen. Note de contenu : - EXPERIMENTAL PROCEDURES : Reagents and chemicals - Computational modeling - Optimisation of reaction between collagen and Zr-Al-Ti complex - Free amino content - Free carboxyl content - Fourrier transformed intrared spectroscoy (FTIR) - Diffused reflectance spectrum (UV-DRS) - Fluorescence spectrum - X-ray photoelectron spectroscopy (XPS) - Differential scanning calorimetry (DSC) and thermogravimetry (TG) - Scanninc electron microscopy (SEM) - Atomic force microscopy (AFM)
- RESULTS AND DISCUSSION : Computational modeling - Modification degree - Spectrum analysis - XPS analysis - Thermal stability - MorphologyEn ligne : https://drive.google.com/file/d/1o3e0lqalQCBbpE3iChLxMEBDI0WVh_Oz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30899
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 4 (07-08/2018) . - p. 174-180[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20126 - Périodique Bibliothèque principale Documentaires Disponible Montmorillonite nanoclay-based self-healing coatings on AA 2024-T4 / S. Manasa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)
[article]
Titre : Montmorillonite nanoclay-based self-healing coatings on AA 2024-T4 Type de document : texte imprimé Auteurs : S. Manasa, Auteur ; T. Siva, Auteur ; S. Sathiyanarayanan, Auteur ; K. V. Gobi, Auteur ; R. Subasri, Auteur Année de publication : 2018 Article en page(s) : p. 721-735 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale
Anticorrosifs
Anticorrosion
Argile
Caractérisation
Epaisseur -- Mesure
Essais (technologie)
Essais d'adhésion
Montmorillonite
Revêtement autoréparant:Peinture autoréparante
Revêtements -- Analyse:Peinture -- Analyse
Revêtements protecteurs
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : Cation-exchanged montmorillonite (MMT), which is an aluminum-pillared clay, was dispersed into an organic–inorganic hybrid silica matrix sol. Cationic inhibitors Ce3+/Zr4+ were introduced into montmorillonite by two methods, namely (1) physical mixing of MMT with the inhibitor solutions and (2) physical mixing for short durations and evacuation of the mixture of MMT and inhibitor solutions. Coatings using these sols were deposited on aluminum alloy AA 2024-T4 substrates, by the dip coating technique followed by thermal curing at 130°C for 1 h. TEM, BET, and XRD analyses were carried out for the inhibitor-modified montmorillonite powders. Potentiodynamic polarization and electrochemical impedance spectroscopic analyses were carried out on uncoated and coated substrates to evaluate the corrosion protection property after exposure to 3.5 wt% NaCl for varying time durations, up to 120 h. Self-healing ability was evaluated using SVET analysis by creating an artificial scribe on the surface and exposure to 3.5 wt% NaCl. Elemental mapping was carried out on scribed substrates before and after exposure to 5 wt% salt fog. Sols containing montmorillonite intercalated with cationic inhibitors when deposited on AA 2024-T4 substrates exhibited low corrosion currents after a prolonged duration of exposure to corrosion medium. Note de contenu : - EXPERIMENTAL : Materials - Sol synthesis and coating deposition - Characterization and testing
- RESULTS AND DISCUSSION : TEM and SEM analysis - X-ray diffraction (XRD) analysis - BET surface area and pore volume analysis - Thickness measurement - SEM and EDS analysis - Adhesion test - Electrochemical impedance spectroscopic (EIS) and potentiodynamic polarization studies - Weight loss experiments - Salot fog test (SFT) and energy-dispersive x-ray spectroscopic (EDS) analysis - SVET analysisDOI : 10.1007/s11998-018-0080-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0080-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30850
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Code-barres Cote Support Localisation Section Disponibilité 20078 - Périodique Bibliothèque principale Documentaires Disponible Les mouvements des molécules / Attila G. Császár in L'ACTUALITE CHIMIQUE, N° 404 (02/2016)
PermalinkMRI as a promising tool for evaluation of the stability of cosmetic emulsions / Y. Onuki in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 38, N° 3 (06/2016)
PermalinkMultispectroscopie : un didacticiel en libre accès pour s'exercer à trouver la formule développée d'un composé organique / Michel Rouillard in L'ACTUALITE CHIMIQUE, N° 344 (09/2010)
PermalinkNaphthoquinone colorants from Arnebia nobilis Rech.f / Anjali Arora in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)
PermalinkNew approach to the meltblown-paradox / Christopher Bruns in CHEMICAL FIBERS INTERNATIONAL, Vol. 71, N° 4 (12/2021)
PermalinkPermalinkNon–animal collagens as new options for cosmetic formulation / Y. Y. Peng in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 37, N° 6 (12/2015)
PermalinkNovel 7-maleimido-2(1H)-quinolones as potential fluorescent sensors for the detection of sulphydryl groups / Jolanta Kolinska in COLORATION TECHNOLOGY, Vol. 134, N° 2 (04/2018)
PermalinkA novel approach for enhanced color intensity and uniformity in leather dyeing / Sujata Mandal in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 6 (06/2018)
PermalinkPermalinkOptimisation of process parameters of Alpaca wool printing with Juglans regia natural dye / Martinia Glogar in COLORATION TECHNOLOGY, Vol. 136, N° 2 (04/2020)
PermalinkOptimizing the spectral absorption profile of sunscreens / Brian L. Diffey in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 1 (02/2017)
PermalinkOxidovanadium(V) dithiocarbamates as driers for alkyd binders / Iva Charamzová in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
PermalinkpH-responsive cotton fibre dyed by natural madder dye / Shilong Zhu in COLORATION TECHNOLOGY, Vol. 138, N° 3 (06/2022)
PermalinkPhotoélectrochimie, photocatalyse et énergie / Marie-Noëlle Collomb in L'ACTUALITE CHIMIQUE, N° 400-401 (10-11/2015)
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