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Dyes, flies, and sunny skies : photodynamic therapy and neglected tropical diseases / Mark Wainwright in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 3–14 Titre : Dyes, flies, and sunny skies : photodynamic therapy and neglected tropical diseases Type de document : texte imprimé Auteurs : Mark Wainwright, Auteur Année de publication : 2017 Article en page(s) : p. 3–14 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Maladies tropicales Photochimiothérapie Index. décimale : 615.5 Thérapeutique : classer à 616.618 les thérapies des diverses maladies Résumé : Photodynamic therapy, in its various applications, represents the focused combination of electromagnetic radiation, a chemical (usually a dye) capable of its absorption and conversion, and oxygen to provide cytotoxicity (cell killing). The effect has been known for over a century, and there is considerable clinical use in terms of its application to various cancers. However, the antimicrobial properties of the technology, which are considerable, have received only a lukewarm reception by healthcare providers, and the possibilities for tropical disease therapy are mainly unexplored. This is particularly vexatious given both the inexpensive nature of the photosensitisers and light sources available and the lack of conventional forward progress in widespread diseases such as leishmaniasis, trypanosomiasis, and tuberculosis in the Developing World. The following review therefore covers the use, or potential use, of the photodynamic approach in this area, mainly with reference to tropical diseases having current ‘neglected’ status according to the World Health Organisation. Note de contenu : - PHOTOSENSITISERS AND THE PHOTODYNAMIC EFFECT - TROPICAL DISEASE AND NEGLECTED STATUS - INFECTION AND TRANSMISSION - IDENTIFYING POTENTIAL APPROACHES - TOPICAL/LOCAL THERAPY : Acceptable photosensitisers - Approaches - Bacterial infection - Protozoal infection - Worm infection - Blood product decontamination - Water purification - Do it yourself DOI : 10.1111/cote.12259 En ligne : https://drive.google.com/file/d/1zqCvWMa9G6O7jE9H2qVu1ok11u3djnk6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27875 [article]

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Vector-based modelling of colour difference : a pilot study of the DE2000 colour difference model / David P. Oulton in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 15–25 Titre : Vector-based modelling of colour difference : a pilot study of the DE2000 colour difference model Type de document : texte imprimé Auteurs : David P. Oulton, Auteur ; Stephen Westland, Auteur Année de publication : 2017 Article en page(s) : p. 15–25 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Couleur Couleur -- Analyse Index. décimale : 535.6 Couleur Résumé : A novel approach to colour difference modelling is presented whereby for any given CMC (1:1) or CIE DE2000 ?E, ?C, ?H, and ?L colour difference, the equivalent CIE XYZ, L*a*b*, and L*C*h coordinate changes are derived by optimising the input RGB stimuli from which they are all calculated. Single-dimension L or C or H difference loci expressed in DE2000 difference units are thus generated, and the additive equivalence of tristimulus values is likewise projected forward onto each locus and also onto a set of CIE DE2000 three-unit ellipse boundaries. Using the datasets thus generated, it is then shown firstly that the derived ellipses have well-defined semi-axes, which explain the detailed orientation of the MacAdam ellipses in x,y,Y space. Unit CIE DE2000 difference is confirmed as a successful quantifying constant of visual difference over a wide range of chroma, hue, and lightness differences. As a constant, CIE DE2000 unit difference is shown to have a significantly variable value at high and low chroma: evidence is established for systematic changes in both chroma and hue difference sensitivity. A hitherto unresolved non-linearity is revealed in the C* dimension of L*C*h space that is not replicated in the CIE DE2000 model. The derived difference loci appear to specify physically reproducible experimental stimuli that could be used in the estimation of visual difference magnitude. Overall, the data derived by the new approach and presented in this paper increase the probability that a true vector model of the visual difference response may eventually be derived. Note de contenu : - METHODS : The presented analysis - The additivity of spectral stimuli - RESULTS AND ANALYSIS : The scalar and additive visual response to spectral stimuli - Ellipse orientation - Cylindrical/polar difference vs Cartesian difference scaling - Generating a continuous metric of colour difference - Lightness difference DOI : 10.1111/cote.12242 En ligne : https://drive.google.com/file/d/1tKvnbXUwl3t71ZTJP9lzkQGpiK1Ci5zF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27876 [article]

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Fabric defect detection based on golden image subtraction / Jun-Feng Jing in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 26–39 Titre : Fabric defect detection based on golden image subtraction Type de document : texte imprimé Auteurs : Jun-Feng Jing, Auteur ; Shan Chen, Auteur ; Peng-Fei Li, Auteur Année de publication : 2017 Article en page(s) : p. 26–39 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Gabor, Filtre de Un filtre de Gabor est un filtre linéaire dont la réponse impulsionnelle est une sinusoïde modulée par une fonction gaussienne (également appelée ondelette de Gabor). Il porte le nom du physicien anglais d'origine hongroise Dennis Gabor. Imagerie (technique) Textiles et tissus -- Défauts Index. décimale : 667.3 Teinture et impression des tissus Résumé : To realise the universality and practicality of fabric defect detection in the textile industry, this paper proposes two approaches based on the Gabor filter and the golden image subtraction method. A method known as Gabor preprocessed golden image subtraction is first introduced, which filters a test fabric image by the real component of the Gabor filter with a 1 Hz centre frequency and a 90° angle. Golden image subtraction performs subtractions between the golden template and the filtered image to obtain a resultant image, and the segmentation threshold is determined by the direct threshold. The second method is Gabor preprocessed golden image subtraction based on a genetic algorithm, which can automatically select the parameter groups of the Gabor filter via the genetic algorithm. In addition, the paper also presents an extensive comparison between the proposed methods and wavelet preprocessed golden image subtraction. Meanwhile, the performances of the aforementioned three methods are tested in a real machine vision detection system to meet the actual demands of the textile industry. It can be concluded that Gabor preprocessed golden image subtraction provides the best detection results. The overall detection success rate is 95.62%, with 80 defect-free images and 80 defective images for fabric textures of common types. Note de contenu : - EXPERIMENTAL : Image processing theories - GIS based on Gabor filter - Parameter tuning - RESULTS AND DISCUSSION : Machine vision system - Experimental materials - Results of GGIS and GAGIS - Comparison with WGIS DOI : 10.1111/cote.12239 En ligne : https://drive.google.com/file/d/1HyYoUkencCMWErVOxOZXXPmJ97lnuzbD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27877 [article]

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Synthesis and studies of two proton-receptor fluorescent probes based on 1,8-naphthalimide / Stephen Opeyemi Aderinto in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 40–49 Titre : Synthesis and studies of two proton-receptor fluorescent probes based on 1,8-naphthalimide Type de document : texte imprimé Auteurs : Stephen Opeyemi Aderinto, Auteur ; Han Zhang, Auteur ; Huilu Wu, Auteur ; Chengyong Chen, Auteur ; Jiawen Zhang, Auteur ; Hongping Peng, Auteur ; Zaihui Yang, Auteur ; Fei Wang, Auteur Année de publication : 2017 Article en page(s) : p. 40–49 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : pH -- Mesure Sondes fluorescentes Index. décimale : 535.6 Couleur Résumé : Two isomeric proton–receptor fluorescent probes 1 and 2 were designed and synthesised by employing the photoinduced electron transfer (PET) principle of a ‘fluorophore–spacer–receptor’ module. Their photophysical characteristics were investigated in organic solvents and Britton–Robinson buffer/EtOH (1:1, v/v) solution. Probe 1 was sensitive in the stronger acidic region of 2.21–4.56, while probe 2 displayed a good response towards protons within the pH scope of 4.10–6.09. The specificity of the probes toward protons in commonly used buffer solutions and in the presence of metal cations, Na(i), K(i), Ca(ii), Mg(ii), Al(iii), Pb(ii), Fe(iii), Ni(ii), Zn(ii), Cu(ii), Hg(ii), Ag(i), Co(ii), Cr(iii), Mn(ii), and Cd(ii) ions, was studied by monitoring the changes in their fluorescence intensity. The tested metal ions exerted no noticeable influence. The results obtained show that the synthesised proton–receptor fluorescent probes have the capability to act as pH-sensitive probes for monitoring pH variations in the range 2.21–6.09. Note de contenu : - EXPERIMENTAL : Optical absorption spectroscopy - Fluorescence spectroscopy - Tolerance of probes to H+ over other metal ions - RESULTS AND DISCUSSION : Design and synthesis of probes based on the PET process - Photophysical characteristics of probes - pH effect on the absortion and fluorescence properties of the probes DOI : 10.1111/cote.12250 En ligne : https://drive.google.com/file/d/1tPbwfGZ7Mglq5DMD772MAMJfjyjtfsN-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27879 [article]

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Theoretical study of the interaction energy of benzodifuranone dye molecule rings / Yi-Zhen Zhan in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 50–56 Titre : Theoretical study of the interaction energy of benzodifuranone dye molecule rings Type de document : texte imprimé Auteurs : Yi-Zhen Zhan, Auteur ; Xue Zhao, Auteur ; Wei Wang, Auteur Année de publication : 2017 Article en page(s) : p. 50–56 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Benzène Le benzène est un composé organique de formule brute C6H6, également noté Ph-H, φ-H, ou encore Ï•-H. Il appartient à la famille des hydrocarbures aromatiques monocycliques, car le cycle formé par les six atomes de carbone est plan et comporte six électrons délocalisés. Dans les conditions usuelles, le benzène est un liquide incolore, d'odeur caractéristique, volatil, très inflammable et cancérogène. C'est un solvant très utilisé dans l'industrie chimique, et un précurseur important pour la synthèse chimique de médicaments, de plastiques, de caoutchouc synthétique ou encore de colorants. Il est produit industriellement par l'industrie pétrochimique essentiellement par reformage catalytique, hydrodésalkylation du toluène et vapocraquage. Benzodifuranone Colorants dispersés Catégorie de colorants très peu solubles dans l'eau, utilisés à l'origine comme colorants pour l'acétate, et qui généralement sont appliqués sous forme de suspensions aqueuses de faible concentration.Les colorants dispersés sont largement utilisés dans la teinture de la plupart des fibres manufacturées, surtout le polyester. Dynamique moléculaire Fonctionnelles densité La théorie de la fonctionnelle de la densité (pour Density Functional Theory, sous-entendu électronique : DFT) constitue au début du XXIe siècle l'une des méthodes les plus utilisées dans les calculs quantiques de la structure électronique de la matière (atomes, molécules, solides) aussi bien en physique de la matière condensée qu'en chimie quantique. La DFT trouve ses origines dans le modèle développé par Llewellyn Thomas et Enrico Fermi à la fin des années 1920. Solidité de la couleur Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The aim of this paper was to reveal the relationship between the interaction energy of benzodifuranone dyes and dyeing performance indices such as dyeing temperature and colour fastness. Dimer models of benzene–benzene, benzodifuranone–benzene, and benzodifuranone–benzodifuranone configuration were set up, and geometry optimisation and interaction energy were calculated using a density functional theory ?B97XD, 6-311G++ (d, p) basis set. The calculation results showed that the benzodifuranone molecule had better coplanarity. The molecular interaction energy of benzene–benzene, benzodifuranone–benzene, and benzodifuranone–benzodifuranone rings decreased at first, and then increased with growth in the distance between the rings, the lowest energy occurring at a distance of about 3.25–3.75 Ã…. The dispersion force affected the interaction energy of benzodifuranone–benzene rings most, while both dispersion force and electrostatic force influenced the interaction energy of benzodifuranone–benzodifuranone rings. These calculation and experimental results revealed that a greater energy was needed to destroy the dye–fibre and dye–dye interaction energy of benzodifuranone-based disperse dyes. Note de contenu : - EXPERIMENTAL : Dye application - Colour fastness - Density functional theory calculations - Molecular interaction energy model - RESULTS AND DISCUSSION : Benzodifuranone molecule optimisation - Benzene-benzene interaction energy - Benzodifuranone-benzene interaction energy - Benzodifuranone-benzodifuranone interaction energy - Optimised configuration interaction energy DOI : 10.1111/cote.12251 En ligne : https://drive.google.com/file/d/17aT2OSno3tpYi2mrBofamof-7y6DzJnT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27880 [article]

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Effect of the water content of padded cotton fabrics on reactive dye fixation in the pad-steam process / Jianfei Zhang in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 57–64 Titre : Effect of the water content of padded cotton fabrics on reactive dye fixation in the pad-steam process Type de document : texte imprimé Auteurs : Jianfei Zhang, Auteur ; Xinqing Zhang, Auteur ; Kuanjun Fang, Auteur ; Dawu Shu, Auteur ; Jixian Gong, Auteur ; Xiuming Liu, Auteur Année de publication : 2017 Article en page(s) : p. 57–64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs Colorimétrie Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Fixation (chimie) Textiles et tissus -- Teneur en eau Thermométrie Vapeur d'eau Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of padded cotton fabrics with various water contents were obtained through vacuum dehydration. The effects of the water content on the fabric temperature variation during steaming, the colour properties, and the dye fixation rate (%F) were investigated. Dye distribution in the dyed cotton fibres was assessed. The influences of steaming time and sodium carbonate concentration on K/S value and %F of the dyed fabrics with low water content were also evaluated. The results indicate that reducing the water content of the padded cotton fabric to around 25.0% prior to steaming was favoured for reactive dyeing. The temperature of the wet fabric rose rapidly, the K/S value and %F were enhanced, and in addition the dye penetration into the dyed cotton fibres was sufficient. However, for padded fabrics with extraordinarily low and high water contents (e.g. 1.4% and 70.9% respectively), both the K/S value and %F were decreased. Furthermore, a white core phenomenon was evident for the fibres of the dyed fabric with a water content of 1.4%. Variation in the L* values was in line with the K/S values as the fabric water content varied. As expected, steaming time and sodium carbonate dosage can also affect reactive dye fixation greatly and should be determined accordingly for dyeing cotton fabric with low water content. Note de contenu : - EXPERIMENTAL : Vacuum dehydration and dyeing of cotton fabrics - Water content of the vacuum-dehydrated cotton fabric - Fabric temperature measurement during steaming - Colour measurements - Dye fixation rate - Fibre cross-section observation of the dyed cotton fabrics - RESULTS AND DISCUSSION : Temperature variation of the fabrics with different water contents during the steaming procedure - Effect of fabric water contents on colour strengths and dye fixation rates - Colorimetric parameters of dyed fabrics with various water contents - Dye distribution in the fibres of the dyed cotton fabrics - Steam fixation of padded cotton fabrics with a low water content DOI : 10.1111/cote.12253 En ligne : https://drive.google.com/file/d/1ff_H8nF6failV3fqARVsc5vyMLBVc-1x/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27881 [article]

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A novel strategy to improve the dyeing properties in laccase-mediated coloration of wool fabric / Ting Zhang in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 65–72 Titre : A novel strategy to improve the dyeing properties in laccase-mediated coloration of wool fabric Type de document : texte imprimé Auteurs : Ting Zhang, Auteur ; Rubing Bai, Auteur ; Qiang Wang, Auteur ; Xuerong Fan, Auteur ; Ping Wang, Auteur ; Jiugang Yuan, Auteur ; Yuanyuan Yu, Auteur Année de publication : 2017 Article en page(s) : p. 65–72 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Laccases Les laccases (EC 1.10.3.2) appartiennent à une famille d'enzymes ayant pour cofacteur du cuivre. C'est une oxydase (oxydoréductase, EC 1) que l'on retrouve dans de nombreuses plantes, champignons et micro-organismes. Le cuivre est lié sur plusieurs sites de la protéine. On distingue trois types. Les types 2 et 3 sont appelés grappe tri-nucléaire. Le cuivre du type 1 est soluble dans l'eau. Le mercure déplace le cobalt complexé dans les laccases. Les complexants du cuivre peuvent le déplacer et le remplacer par du cobalt. Les cyanures complexent également le cuivre, mais dans ce cas il n'est pas possible de réinsérer du cobalt. Les laccases oxydent les dérivés phénoliques mais d'une façon ménagée qui transforme la lignine en monolignol. Laine Microscopie Polymérisation Solidité de la couleur Spectroscopie ultraviolette Surfaces -- Analyse Syringique, Acide Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Enzymatic coloration of fabrics has received worldwide attention in recent years. In order to improve the dyeing properties of enzymatically coloured fabrics, a novel strategy using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC), a biological coupling agent, to pretreat wool fabric was employed in this paper. Enzymatic coloration of wool fabrics with syringic acid was carried out in the presence of laccase from Trametes versicolor. The effect of different periods on laccase-catalysed polymerisation of syringic acid was examined by UV-vis spectroscopy. Enzymatic coloration results of dyed wool fabrics were evaluated by means of K/S value and colour difference (?E*). Process parameters, including the dosages of syringic acid and incubation time, that influenced the colour depth were studied. Meanwhile, the colour fastness and levelness of dyed wool fabrics were tested. The results showed that the UV-vis absorbance of reaction solution increased as oxidation time elapsed, and a new peak appeared at 360 nm. After pretreatment, the K/S values and colour difference values of wool fabrics dyed with poly(syringic acid) improved appreciably compared with the control samples without any pretreatment. Moreover, pretreated wool fabrics showed better dyeing fastness and levelness than control samples. Note de contenu : - MATERIALS AND METHODS : Pretreatment of wool fabric - Laccase-mediated coloration of wool fabric - UV-vis spectrum analysis - Colour parameter measurement of dyed wool fabric - Surface morphology - Microscopic analysis of wool yarn cross-section - Colour fastness tests - RESULTS AND DISCUSSION : UV-vis spectra of phenolic acid compound - Colour characteristics of dyed wool fabrics - Surface morphology of wool fabrics - Effects of monomer concentration and incubation time on the colour depth of dyed wool fabrics - Yarn cross-section microscopic analysis - Colour fastness tests DOI : 10.1111/cote.12252 En ligne : https://drive.google.com/file/d/1haab813CNbkDRxt-GXoKDhFiLU_n87uv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27882 [article]

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Neural network approach to a colorimetric value transform based on a large-scale spectral dataset / Qiang Liu in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 73-80 Titre : Neural network approach to a colorimetric value transform based on a large-scale spectral dataset Type de document : texte imprimé Auteurs : Qiang Liu, Auteur ; Xiaoxia Wan, Auteur ; Jinxing Liang, Auteur ; Zhen Liu, Auteur ; Dehong Xie, Auteur ; Chan Li, Auteur Année de publication : 2017 Article en page(s) : p. 73-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Couleur Imagerie numérique Réseaux neuronaux (informatique) Tags : 'Tranformation  de  valeurs  colorimétriques'  'Transformation  pour  l'adaptation  chromatique'  'Reproduction  numérique'  'Réseaux  neuronaux' Index. décimale : 667.3 Teinture et impression des tissus Résumé : To improve the transform accuracy of colorimetric values for digital colour reproduction, a neural network approach based on a large-scale spectral dataset was proposed. The presented dataset exhibited a particularly wide colour gamut and was partitioned into 12 subsets according to dominant wavelength and excitation purity. In each subset, the non-linearity between colorimetric values under source and target illuminant–observer combinations was simulated by a backpropagation neural network. The colorimetric transform accuracy of this approach was compared with several existing methods. The experimental results indicated that the proposed approach significantly enhanced the transform precision for colorimetric values, especially for the colours located in highly saturated regions. Note de contenu : - Large-scale spectral dataset - Proposed CVT approach - Experimental verification DOI : 10.1111/cote.12256 En ligne : https://drive.google.com/file/d/1cuH5zM2QTG7PT9VKVKWvwFDAMbqt9MCq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27893 [article]

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Spectroscopic evaluation of the colour play effect of thermochromic liquid crystal printing inks / Maja Jakovlević in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 81-87 Titre : Spectroscopic evaluation of the colour play effect of thermochromic liquid crystal printing inks Type de document : texte imprimé Auteurs : Maja Jakovlević, Auteur ; Branka Lozo, Auteur ; Marta Klanjsek Gunde, Auteur Année de publication : 2017 Article en page(s) : p. 81-87 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Colorimétrie Cristaux liquides Encre d'imprimerie Thermochromie Index. décimale : 667.2 Colorants et pigments Résumé : Colour changes of a thermochromic liquid crystal (TLC) ink printed on a black substrate are clearly observed by the naked eye, and therefore it is reasonable to expect that every approach recommended for colour measurements of samples with solid colour would be appropriate. In addition, the published spectroscopic analyses of TLC inks do not provide any guidance or limitations for the measurement geometry. On the other hand, our study demonstrates that spectroscopic measurements of such samples are not so straightforward. When using the most simple and commonly used measurement equipment with a directional illumination and viewing approach, the temperature-dependent spectral features resolve in a narrow spectral region that gives only a small part of the colour play effect. Detection of the entire effect requires the use of integrating spheres, which spatially integrate the radiant flux reflected on a sample in any direction; better results are obtained by spheres of larger diameter. The comparision of spectroscopic and colorimetric results obtained when different measurement geometries are applied on the same sample may demonstrate certain properties of the liquid crystal material inside microcapsules and help in understanding some details of the optical properties of the ink layer. DOI : 10.1111/cote.12257 En ligne : https://drive.google.com/file/d/1pQIZ4jbwq63Oxmy3QfA8jE-YOJcGW4UA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27894 [article]

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The use of nutshell firstly as a natural dye for cotton and wool and then as a natural adsorbent for colour removal of basic dye effluent / Elçin GüneÅŸ in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 88-93 Titre : The use of nutshell firstly as a natural dye for cotton and wool and then as a natural adsorbent for colour removal of basic dye effluent Type de document : texte imprimé Auteurs : Elçin GüneÅŸ, Auteur ; Riza Atav, Auteur Année de publication : 2017 Article en page(s) : p. 88-93 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Bains de teinture -- Epuration Colorants -- Adsorption Colorants végétaux Coquille de noix Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Eaux usées -- Epuration Laine Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The aim of this study is to utilise nutshell, which is normally a waste. To this end, in the first part of our study we investigated the usability of nutshell extract solution as a natural dye for the coloration of cotton and wool fabrics. In order to optimise the fastness properties of dyed samples, mordant type was chosen as a variable in experiments and dyeings were carried out at 100 g l?1 extract concentration. After extracting its dye, nutshell was used as adsorbent for colour removal of basic dye effluent. The effect of adsorbent dose, initial dye concentration, and contact time on the adsorption of malachite green (MG) onto nutshell was investigated. Adsorption isotherms and kinetics of MG adsorption onto nutshell were also studied. Note de contenu : - MATERIALS AND METHODS : Experiments related to the use of nutshell as a natural dye - Experiments related to the use of nutshell as a natural adsorbent - RESULTS AND DISCUSSION : Results related to the use of nutshell as a natural dye - Results related to the use of nutshell as a natural adsorbent DOI : 10.1111/cote.12255 En ligne : https://drive.google.com/file/d/1c0OhJB3ZT-scQy_xDT4pZE8fmXAqgqSH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27895 [article]

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18636	-	Périodique	Bibliothèque principale	Documentaires	Disponible