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Ajouter le résultat dans votre panierAnalysis of keratin films as screening tools for predicting the efficacy of potential haire dyes / Tova N. Williams in COLORATION TECHNOLOGY, Vol. 135, N° 4 (08/2019)
Titre : Analysis of keratin films as screening tools for predicting the efficacy of potential haire dyes Type de document : texte imprimé Auteurs : Tova N. Williams, Auteur ; Harold S. Freeman, Auteur Année de publication : 2019 Article en page(s) : p. 253-266 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cheveux -- Teinture
Colorants -- Analyse
Colorants acides
Couches minces
kératinesLa kératine est une protéine, synthétisée et utilisée par de nombreux êtres vivants comme élément de structure, et également l'exemple-type de protéine fibreuse.
La kératine est insoluble, et peut être retrouvée sur l'épiderme de certains animaux, notamment les mammifères, ce qui leur garantit une peau imperméable. Parfois, lors d'une friction trop importante, la kératine se développe à la surface de la peau formant une callosité. Les cellules qui produisent la kératine meurent et sont remplacées continuellement. Les morceaux de kératine qui restent emprisonnés dans les cheveux sont couramment appelés des pellicules.
La molécule de kératine est hélicoïdale et fibreuse, elle s'enroule autour d'autres molécules de kératine pour former des filaments intermédiaires. Ces protéines contiennent un haut taux d'acides aminés à base de soufre, principalement la cystéine, qui forment un pont disulfure entre les molécules, conférant sa rigidité à l'ensemble. La chevelure humaine est constituée à 14 % de cystéine.
Il y a deux principales formes de kératines : l'alpha-kératine, ou α-keratin, présente chez les mammifères notamment, dont l'humain, et la bêta-kératine, ou β-keratin, que l'on retrouve chez les reptiles et les oiseaux. Ces deux types de kératines ne présentent clairement pas d'homologie de séquence.
Chez l'être humain, la kératine est fabriquée par les kératinocytes, cellules se trouvant dans la couche profonde de l'épiderme. Les kératinocytes absorbent la mélanine (pigment fabriqué par les mélanocytes), se colorent et ainsi cette pigmentation de l'épiderme permet de protéger les kératinocytes des rayons ultraviolets du Soleil. (Wikipedia)
Orange (couleur)
Produits capillairesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : The technology for generating high quality keratin films has recently advanced and led to their implementation in a variety of applications. As an initial step toward investigating the films as a screening tool for predicting the efficacy of potential hair dyes, CI Acid Orange 7 was applied to a set of opaque and translucent films. Overlaid time‐of‐flight secondary ion mass spectrometry images arising from protein and dye fragments revealed that dye uniformly penetrated both film types. Results also showed that the relative concentration of dye in each film complemented outcomes from ultraviolet‐visible analysis and revealed that the translucent film contained a higher dye concentration. Scanning electron microscopy analysis of film morphology suggested that the observed difference was due to the higher porosity of the opaque film, which facilitated dye desorption during the rinsing step. Consequently, the translucent film was judged to be a better substrate for screening potential new hair dyes. Note de contenu : - EXPERIMENTAL : Chemicals and other materials - Bleaching keratin fibres - Attenatuated total reflectance-Fourier Transform-infrared spectroscopy analysis of keratin flms - Thermogravimetric analysis of dyed keratin flms - SEM analysis of keratin films - Dye desalinisation and analysis - Dyeing keratin films - UV-Vis analysis of dyed keratin films - TOF-SIMS analysis of dyed keratin films
- RESULTS AND DISCUSSION : Molecular ocmposition of keratin films - Thermal stability of keratin films - Morphology of keratin fibres and films - Dye uptake on keratin films - TOF-SIMS studies of dyed keratin filmsDOI : 10.1111/cote.12408 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12408 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32828
in COLORATION TECHNOLOGY > Vol. 135, N° 4 (08/2019) . - p. 253-266[article]Réservation
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Titre : Yellow pigment of Metarhizium anisopliae and its application to the dyeing of fabrics Type de document : texte imprimé Auteurs : Biaobiao Yan, Auteur ; Muying Yang, Auteur ; Qingqing Zhou, Auteur ; Tieling Xing, Auteur ; Guoqiang Chen, Auteur ; Jiayong Sheng, Auteur Année de publication : 2019 Article en page(s) : p. 267-274 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Fibres animales
Jaune
Laine
Pigments bactériens
Soie et constituants
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Microbial dyes have received substantial attention because of their natural environmental protection, simple access, and reduced regional and seasonal restriction. In this work, a microbial dye, the yellow pigment produced by Metarhizium anisopliae, was first studied then applied. The strain produced by the culture was identified, and the conditions for producing yellow pigment were optimised. Further, the stability of M. anisopliae yellow pigment was examined, and the pigment was applied to the dyeing of silk and wool fabrics. The results showed that the homology of the strain with M. anisopliae was 99.98%. In liquid fermentation culture, the optimal carbon source was glucose, and the dosage was 30 g/l. The maximum pigment yield can be obtained by culturing with 4% v/v of inoculation quantity at pH 7 and 30 °C. In addition, the effects of pH, temperature and metal ions on the yellow pigment of M. anisopliae were significant. The optimum dyeing process conditions were dyeing temperatures of 80 °C for silk and 90 °C for wool, with a dyeing time of 60 min. This research developed a novel microbial dye and studied its application for the dyeing of protein fibres. Note de contenu : - EXPERIMENTAL : Materials - Preparation of pigment solution - Identification of strains - Optimisation of medium composition and fermentation process - Dyeing - Characterisations
- RESULTS AND DISCUSSION : Preparation of M. anisopliae yellow pigment solution - Identification - UV absorption spectrum and chromaticity - Optimisation of fermentation medium and process - Stability of yellow pigment - Dyeing process and colour fastness of the fabricsDOI : 10.1111/cote.12401 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12401 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32829
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Titre : Determination of the dye penetration rate in porous aluminum oxide using Raman spectroscopy Type de document : texte imprimé Auteurs : Tadas Matijosius, Auteur ; Svajus J. Asadauskas, Auteur ; Gedvidas Bikulcius, Auteur ; Algirdas Selskis, Auteur ; Sigitas Jankauskas, Auteur ; Jevgenij Visniakov, Auteur ; Ilja Ignatjev, Auteur Année de publication : 2019 Article en page(s) : p. 275-282 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine
Caractérisation
Colorants
Matériaux poreux
Métaux -- Oxydation anodique
Pénétration (physique)
Spectroscopie RamanIndex. décimale : 667.2 Colorants et pigments Résumé : Oxidised aluminum coatings are useful in various high technology applications to protect surfaces from negative environmental effects. In this study, aluminum discs and foils of industrial alloys were anodised in a sulphuric acid/oxalic acid electrolyte. Scanning electron microscopy was used to determine the pore diameter, distribution and surface porosity. The anodising procedure was adapted to produce near‐hollow templates on aluminium foil, onto which aqueous solutions of commercial chromium‐complexed anionic azodyes were dropped. Raman spectroscopy was used to detect the penetration of dye compounds based on the most intensive vibrational modes. Each dye was successfully monitored to assess its penetration rate and behaviour in the anodised coating. This method could be applied to characterise newly developed organic dyes for aluminum colouring. Note de contenu : - EXPERIMENTAL : Materials - Procedure - Characterisation
- RESULTS AND DISCUSSION : Structural aspects of anodised specimens - Spectroscopic observations of undyed surfaces - Characterisation of dyes - Measurement of dye penetration ratesDOI : 10.1111/cote.12404 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12404 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32830
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Titre : Effect of pigment colour on the printing performance of synthetic leather using a ultraviolet-curable water-borne polyurethane acrylate binder Type de document : texte imprimé Auteurs : Gülçin Baysal, Auteur ; Berdan Kalav, Auteur ; Burcak Karaguzel Kayaoglu, Auteur Année de publication : 2019 Article en page(s) : p. 283-291 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique) -- Mesure
Colorimétrie
Copolymère uréthane acrylate
Cuir synthétique imprimé
Encre en phase aqueuse
Essai de dureté
Impression jet d'encre
Liants en phase aqueuse
Photoamorceurs (chimie)
Résistance à l'abrasion
Résistance au chocsIndex. décimale : 667.2 Colorants et pigments Résumé : The effect of pigment colours, cyan (C), magenta (M) and yellow (Y), and a blend of these (CMY blend) on the printing performance of synthetic leather using a ultraviolet (UV)-curable water-borne polyurethane acrylate binder and two types of photoinitiators was investigated. The curing process was carried out at different radiation doses using gallium and mercury UV lamps in combination. The performance of the prints was evaluated with abrasion resistance, crock fastness, gloss and hardness values and K/S. Chemical changes in the cured film structures due to UV curing were analysed by Fourier Transform–infrared spectroscopy measurements. The highest hardness values for clear and pigmented cured films were obtained with a gallium and mercury lamp combination at the highest energy density (1529 mJ/cm2). The highest K/S was obtained for the sample printed with the formulation including the C pigment and cured under a gallium and mercury lamp combination at low energy density (398 mJ/cm2). The M‐pigmented film displayed the highest hardness and abrasion resistance, whereas lower values were obtained with films pigmented with Y and C, and CMY blend, successively. The highest dry and wet crock values were obtained with the formulation including the M pigment. CMY-pigmented film showed the highest gloss values at all energy densities. The pigment colour affected the curing degree of printed films due to the different absorption/transmission intervals of each colour in the UV spectrum. Note de contenu : - EXPERIMENTAL : Materials - Methods
- RESULTS AND DISCUSSION : UV curing and pendulum hardness measurements - FTIR - Colour measurements - Gloss measurements - Crock fastness - Abrasion resistanceDOI : 10.1111/cote.12402 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12402 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32831
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Titre : Colour harmony of two-colour combinations using a 3D colour configuration Type de document : texte imprimé Auteurs : Shi-Min Gong, Auteur ; Wen-Yuan Lee, Auteur Année de publication : 2019 Article en page(s) : p. 292-304 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couleur Tags : 'Harmonie des couleurs' 'Configuration 3D' Index. décimale : 535.6 Couleur Résumé : Over the past few years, although many studies have investigated colour harmony, most of those used the planar colour configuration, which is not in line with the design requirements of real‐life products. Therefore, this study used 11 basic colours and five types of colour scheme techniques to derive 141 colour combinations applied upon a physical 3D colour configuration to observe the phenomena of colour harmony. The results show that colour harmony on a 3D colour configuration is different from that on a planar colour configuration, and can be divided into four phenomena: (i) lightness difference was found to determine the colour harmony while achromatic colour was configured with achromatic colour; (ii) lightness sum prompted colour harmony while chromatic colour was configured with achromatic colour; (iii) lightness sum and chroma sum were found to determine colour harmony while chromatic colour was configured with chromatic colour with a two‐colour hue angle difference >90°; and (iv) lightness sum and hue difference were a determination of colour harmony while chromatic colour was configured with chromatic colour with a two‐colour hue angle difference of ≤90°. On the basis of these phenomena, this study develops a colour harmony model based on the colour parameters, most of which are derived from the addition of the colour attributes of two colours. Note de contenu : - Literature review
- Experimental
- Intra- and inter-observer variation
- The interrelationship between colour harmony and colour parameters
- Colour harmony model for colour combination on 3D colour configuration
- Comparison with existing colour harmony modelsDOI : 10.1111/cote.12405 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12405 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32832
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Titre : Synthesis and photophysical properties of meso-aminophenyl-substituted heptamethine dyes as potential leads to new contrast agents Type de document : texte imprimé Auteurs : Okoh Okoh Adeyi, Auteur ; Megan E. Critchley, Auteur ; Roger H. Bisby, Auteur ; Clare L. Lawrence, Auteur ; Mark Wainwright, Auteur ; Robert B. Smith, Auteur Année de publication : 2019 Article en page(s) : p. 305-311 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Synthèse
Fluorescence
HeptaméthineIndex. décimale : 667.2 Colorants et pigments Résumé : The series of rigid meso‐aminophenyl‐substituted heptamethine dyes presented herein exhibit surprising fluorescence properties, demonstrating larger Stokes shifts when compared with both structurally similar rigid meso‐chlorophenyl and linear heptamethine dyes. Based on their photophysical properties, these are of considerable importance to the development of contrast agents, within biology and medicine. DOI : 10.1111/cote.12403 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12403 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32833
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Titre : Natural colorant extraction from Cinnamomum camphora tree leaves of different maturities and its ultrasonic-assisted extraction process Type de document : texte imprimé Auteurs : Kang Gong, Auteur ; Yi Pan, Auteur ; Luqman Jameel Rather, Auteur ; Wuchao Wang, Auteur ; Zhou Qi, Auteur ; Tonghua Zhang, Auteur ; Qing Li, Auteur Année de publication : 2019 Article en page(s) : p. 312-321 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Camphrier et constituants Le camphrier ou arbre à camphre (Cinnamomum camphora (L.) J. Presl, 1825) est une espèce d'arbres de la famille du laurier (Lauraceae) dont on extrait le camphre par distillation de son bois, dit "bois de Ho".
Colorants végétaux
Extraction (chimie)
Extraction par ultrasonsIndex. décimale : 667.2 Colorants et pigments Résumé : This study investigated natural colorant extraction from camphor tree leaves using a green and effective process. Ethanol, acetic acid, aqueous sodium carbonate and an aqueous solution of cellulase enzyme were used to examine the extraction performance, with and without the assistance of ultrasonics. Results showed that when subjected to changes in frequency and extraction time, ultrasonics is able to accelerate the extraction process and achieve a better yield for chlorophyll and anthocyanin extraction from fresh leaves compared with a traditional heating bath at similar temperatures. However, when an alkaline solvent was used to extract dark brown colorant from the old leaves, a traditional heating bath was found to be more effective than ultrasonic extraction. Cellulase enzyme failed to show its effectiveness in this study when serving as a colorant-extracting solvent, regardless of the use of ultrasonics. Note de contenu : - EXPERIMENTAL : Collection and preparation of the leaves - Extraction equipment and condition - Extracting solvents - Extraction process
- RESULTS AND DISCUSSION : Extraction performance - Ultrasonic-enhanced extraction process - Ethanol extraction - Acid and alkaline extraction Enzyme extraction - Colour yield of camphor tree leaves with different extracting solvents and extraction methodsDOI : 10.1111/cote.12406 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12406 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32834
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Titre : Energy-efficient dyeing of nylon 6 using indigo powder dyestuff after atmospheric plasma treatment at ambient pressure Type de document : texte imprimé Auteurs : Fei Fan, Auteur ; Yingzhu Wu, Auteur ; Xunxin Wu, Auteur Année de publication : 2019 Article en page(s) : p. 322-322 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermomécanique
Diélectriques
Indigo
Plasma à pression atmosphériqueUn plasma à pression atmosphérique (ou plasma à PA ou plasma froid) est le nom donné à une catégorie spéciale de plasma pour lequel la pression approche celle de l’atmosphère.
Le plasma à pression atmosphérique marque une nette différence avec le plasma basse et haute pression. En effet, contrairement à ces derniers aucune enceinte de traitement n'est nécessaire. Ce type de plasma peut donc être utilisé directement sur ligne de production, évitant ainsi l'utilisation de vide qui est extrêmement onéreuse.
Polyamide 6
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Nylon 6 was treated with a dielectric barrier discharge, i.e. atmospheric plasma at ordinary air pressure. Factors influencing the dyeing process of nylon 6 using indigo blue powder were studied. The mechanism and effect of this dyeing technology were compared with those of conventional technology. Dyeing after plasma treatment at 30–50 °C can produce high dye uptake in a short time. Notably, dyeing after plasma treatment is beneficial for energy conservation. However, at 60–70 °C, the K/S values of plasma‐treatment dyeing sharply increased over a short time, after which they remained largely unchanged. This finding indicated that the dyeing mechanism changed. The speed constant of dyeing after plasma treatment is 2.8 times that of conventional dyeing. The K/S values of dyeing samples after plasma treatment approached the dyeing saturation K/S value in a short time; therefore, this method of dyeing after plasma treatment achieves energy conservation and efficiency in a brief period of time. Conversely, conventional dyeing is more effective at high temperatures but consumes more energy. The adaptive electro‐discharge condition is achieved under the treatment conditions of 375 W for 2 min. The chromatic aberration of the dyed samples after plasma treatment is smaller than that of conventional dyeing at 50 °C for 75 min. Note de contenu : - EXPERIMENTAL : Materials - Dealing with nylon 6 under ordinary atmospheric pressure with dielectric barrier discharge - Dyeing of nylon 6 fabric using indigo blue - Morphology of nylon 6 before and after atmospheric plasma treatment - Fourier Transform-infrared spectroscopy - Wicking properties of indigo blue-dyed nylon fabric - Colour properties of dyed nylon 6 fabric - Measurement and analysis of dyeing fastness - Dyeing aberration comparison between the conventional dyeing technique and plasma treatment dyeing
- RESULTS AND DISCUSSION : Plasma treatment dyeing mechanism - Influence of atmospheric plasma tratment on the capillary effect of nylon 6 at ordinary pressure - Dynamic curves of nylon 6 fabric dyeing with botanic indigo - Measurement and analysis of dyeing activation energy - Dyeing thermomechanical analysis - Measurement and analysis of dyeing fastness - Dyeing aberration comparison between conventional and plasma-treatment dyeingDOI : 10.1111/cote.12407 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12407 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32835
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