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4,5-Dinitrosulfonefluorescein and related dyes : Kinetics of reversible rupture of the pyran ring and their interaction with lysozyme / Nika N. Kriklya in COLORATION TECHNOLOGY, Vol. 137, N° 6 (12/2021)
[article]
Titre : 4,5-Dinitrosulfonefluorescein and related dyes : Kinetics of reversible rupture of the pyran ring and their interaction with lysozyme Type de document : texte imprimé Auteurs : Nika N. Kriklya, Auteur ; Taras Yu. Gromovoy, Auteur ; Nicolay O. Mchedlov-Petrossyan, Auteur Année de publication : 2021 Article en page(s) : p. 658-667 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Colorants -- Analyse
Dynamique moléculaire
Fluorescence
LysozymeLe lysozyme est une protéine globulaire formée de 129 acides aminés (chez l'être humain), que l'on rencontre dans un certain nombre de sécrétions (larmes, salive, lait maternel, mucus...) et dans le blanc d'œuf, chez de nombreuses espèces d'animaux, dont insectes et acariens1.
Il s'agit d'une hydrolase acide (EC 3.2.1.17) sécrétée par les granulocytes et les monocytes. Elle détruit la paroi bactérienne en catalysant l'hydrolyse des peptidoglycanes la constituant.
Spectrométrie de masseIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Fluorescein and sulfonefluorescein dyes are stable in solution within a wide pH range. Nucleophilic addition of the hydroxide (HO–) group to the nodal carbon atom is not typical of these compounds. They are also not prone to rupture of the pyran cycle under the action of alkali. However, the last-named heterocycle readily opens at high pH values in the case of derivatives containing nitro groups in the xanthene moiety. Moreover, while in the case of nitrofluoresceins, for example, 4,5-dinitrofluorescein, this reaction is irreversible, with 4,5-dinitrosulfonefluorescein acidification of the alkaline solution immediately returns the visible absorption spectrum to that of the original hydroxyxanthene dye. We present a quantitative study of the kinetics of the pyran cycle rupture in aqueous alkali without and with micelles of a cationic surfactant. Also, both initial dye and reaction product were studied via the matrix-assisted laser desorption/ionisation time-of-flight (MALDI-ToF) technique. The second part of the article is devoted to the interaction of 4,5-dinitrosulfonefluorescein and other dyes of similar structure with lysozyme basing on the MALDI-ToF mass spectrometry. This made it possible to arrange the dyes according to their affinity for the protein and draw some conclusions about the nature of the association of the dye with lysozyme. Note de contenu : - EXPERIMENTAL : Materials - Mass spectrometry - Characterisation of the colloidal species - Procedure of the kinetics study
- RESULTS AND DISCUSSION : Alkaline rupture of the pyrancycle of 4,5-dinitrosulfonefluorescein - Kinetic data processing : Aqueous NaOH solutions - Surfactant effect : 4,5-dinitrosulfonefluorescein in the aqueous CTAB/NaOH system - The behaviour of 2,4,5,7-tetranitrosulfonefluorescein in alkaline aqueous media - Interaction of the dyes with lysozymeDOI : https://doi.org/10.1111/cote.12565 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12565 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36795
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Code-barres Cote Support Localisation Section Disponibilité 23068 - Périodique Bibliothèque principale Documentaires Disponible Analysis 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)
[article]
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
kératineLa 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.
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
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Code-barres Cote Support Localisation Section Disponibilité 21090 - Périodique Bibliothèque principale Documentaires Disponible Bond length alternation in unsymmetrical cyanine dyes and its influence on the vibrational structure of their electronic absorption spectra†/ Heinz Mustroph in COLORATION TECHNOLOGY, Vol. 133, N° 6 (12/2017)
[article]
Titre : Bond length alternation in unsymmetrical cyanine dyes and its influence on the vibrational structure of their electronic absorption spectra†Type de document : texte imprimé Auteurs : Heinz Mustroph, Auteur ; Knut Reiner, Auteur ; Bianca Senns, Auteur Année de publication : 2017 Article en page(s) : p. 469-475 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Colorants -- Analyse
CyaninesLes cyanines sont le nom non systématique d'une famille de marqueurs synthétiques appartenant au groupe des polyméthines. Les cyanines ont de nombreuses utilisations comme marqueurs fluorescents, particulièrement en imagerie biomédicale. Selon la structure, elles couvrent un spectre allant de l'IR à l'UV.
Spectres d'absorptionIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Based on the assumption that the unsymmetrical cyanine dyes can be regarded as a hybrid of the two corresponding symmetrical dyes it was expected that ?max of the unsymmetrical dye would be the arithmetic mean of ?max of the two symmetrical dyes. There is, however, often a remarkable difference between the arithmetic mean and the observed ?max of the unsymmetrical dye – the Brooker deviation. To date, this effect is explained in terms of increasing electronic energy differences. With increasing difference of the electronic structure between the ground and excited state, the difference between equilibrium geometry of ground and excited state increases and the relative intensity of the higher vibronic transitions 0–v increases and that of the 0–0 transition decreases. ?max represents the intensity maximum of an absorption band and could be related to the 0–0, 0–1 or another vibronic transition. We discuss the origin of the Brooker deviation on the vibrational structure of the spectra. Note de contenu : - Stationary electronic absorption spectra
- The origin of vibrational structure in electronic absorption spectraDOI : 10.1111/cote.12303 En ligne : https://drive.google.com/file/d/13MxemrgVtdrVJqNmN64S4M3BfbdPUS-S/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29493
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Code-barres Cote Support Localisation Section Disponibilité 19395 - Périodique Bibliothèque principale Documentaires Disponible Comparative sorption isotherms for colorants present in Dyers’ madder (Rubia tinctorum L.) provide new insights into historical dyeing / Lauren Ford in COLORATION TECHNOLOGY, Vol. 134, N° 1 (02/2018)
[article]
Titre : Comparative sorption isotherms for colorants present in Dyers’ madder (Rubia tinctorum L.) provide new insights into historical dyeing Type de document : texte imprimé Auteurs : Lauren Ford, Auteur ; Christopher M. Rayner, Auteur ; Richard S. Blackburn, Auteur Année de publication : 2018 Article en page(s) : p. 3-12 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
Adsorption
Colorants -- Analyse
Colorants végétaux
Garance et constituants
Laine
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Dyers madder (Rubia tinctorum L.) has been famously used throughout history as a source of red dye. The sorption onto mordanted wool of the major colorant components of R. tinctorum, alizarin and the glycosides ruberythric acid and lucidin primeveroside, is studied herein. Sorption of a purified 1:1 mixture of ruberythric acid:lucidin primeveroside most closely followed a Temkin isotherm (R2 0.925), whereas alizarin followed a Freundlich isotherm (R2 0.940). These results were compared with HPLC chromatograms of English, Turkish and Iranian varieties of R. tinctorum before and after dyeing, where it was observed that the glycosides are shown to have the highest uptake onto wool. The higher sorption energy of the purified 1:1 ruberythric acid:lucidin primeveroside mixture (–11.4 kJ mol−1) compared with alizarin (–5.8 kJ mol−1) is in agreement with the HPLC results, indicating that the ruberythric acid/lucidin primeveroside mixture has a substantially higher affinity for wool compared with alizarin. Not only do the glycosides show higher affinity for the wool, but greater interactions between adsorbed species suggest a more extensive aggregation of dye on the surface of the wool. These observations are in contrast with much of the literature and bring into question previous conclusions that alizarin was the main dyeing species throughout history. Note de contenu : - THEORY : Langmuir isotherm - Freundlich isotherm - Temkin isotherm - Adsorption energy
- MATERIALS AND METHODS : Materials - Purification of 'ruberythric acid' by solid-phase extraction (SPE) - Dyeing process - Sorption isotherms - UV/visible spectrophotometry - High performance liquid chromatography with photodiode array detection (HPLC-DAD)
- RESULTS AND DISCUSSION : HPLC dyeing studies of Iranian, Turkish and English madder - Sorption isotherms of the purified 1:1 ruberythric acid : lucidin primeveroside mixture and alizarinDOI : 10.1111/cote.12327 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12327 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30122
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Code-barres Cote Support Localisation Section Disponibilité 19649 - Périodique Bibliothèque principale Documentaires Disponible Degradation studies of CI Reactive Blue 19 on biodegraded cellulosic fabrics via liquid chromatography-photodiode array detection coupled to high resolution mass spectrometry / Nadia Sultana in COLORATION TECHNOLOGY, Vol. 135, N° 6 (12/2019)
[article]
Titre : Degradation studies of CI Reactive Blue 19 on biodegraded cellulosic fabrics via liquid chromatography-photodiode array detection coupled to high resolution mass spectrometry Type de document : texte imprimé Auteurs : Nadia Sultana, Auteur ; Kelsey Williams, Auteur ; Mary Ankeny, Auteur ; Nelson R. Vinueza, Auteur Année de publication : 2019 Article en page(s) : p. 475-483 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie)
Bleu (couleur)
Colorants -- Analyse
Colorants réactifs -- Biodégradation
Colorants réactifs -- Détérioration
Fibres cellulosiques
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.2 Colorants et pigments Résumé : When textile substrates biodegrade in landfills, the fate of textile colorants is unknown, and potentially poses an ecotoxic threat. In this study, we developed a systematic analytical method to evaluate the biodegradation of reactive dyes, the most common class of dye applied to cotton fabrics. The cotton fabrics were dyed with CI Reactive Blue 19 and biodegraded in soil in a laboratory-controlled environment over intervals of 45 and 90 days. A dye isolation method using a low concentration of alkali (0.15% sodium hydroxide) was developed and applied (80°C for 1 hour) to isolate intact and degraded dye from the fabric samples. To quantify the intact dye isolated from the fabric samples, a quantification method was then developed using liquid chromatography-photodiode array detection. The quantification method provided excellent linearity (R2 = 0.9997 ± 0.0002), accuracy (% error = -2% ± 4), precision (% coefficient of variation = 2% ± 4) and sensitivity (lower limit of quantification = 0.4 ± 0.2 µg/mL) for concentrations ranging from 1 to 50 µg/mL. After validation, the method was applied and showed a reduction of dye in biodegraded samples (after 45 and 90 days) compared with undegraded control samples (0 days). To characterise the isolated dye degradation product, quadrupole time-of-flight tandem mass spectrometry was utilised. Analysis showed that the degradation product was formed by losing a -SO3- group from the intact hydrolysed form of the dye, creating a more hydrophobic degradation product compared with the intact hydrolysed form of dye. Note de contenu : - EXPERIMENTAL : Materials and reagents - Biodegradation of dyes fabric samples - Dye isolation method - Synthesis of hydrolysed dye standard - Quantitative monitoring of degradation
- RESULTS AND DISCUSSION : Characterisation of synthesised hydrolysed dye standard - Analysis of undegraded control sample - Validation of quantification method - Quantification of dyes on biodegraded samplesDOI : 10.1111/cote.12440 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12440 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33379
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Code-barres Cote Support Localisation Section Disponibilité 21322 - Périodique Bibliothèque principale Documentaires Disponible Determination of the behaviour of various dyestuff classes in cold dyeing without float / K. Rosenbusch in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 8 (08/1970)
PermalinkDimerised heterobifunctional reactive dyes. Part 1 : characterisation using quadrupole time-of-light mass spectrometry / Nadia Sultana in COLORATION TECHNOLOGY, Vol. 134, N° 6 (12/2018)
PermalinkEco-friendly, rapid and efficient analytical procedure for carcinogenic aryl amines in dyes and consumer products / S. Suresh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 1 (01/2016)
PermalinkEffect of tartrazine dye on micellisation of cationic surfactants : conductometric, spectrophotometric, and tensiometric studies / Anwar Ali in COLORATION TECHNOLOGY, Vol. 132, N° 5 (10/2016)
PermalinkExperimental and theoretical insight into the electronic properties of 4-aryl-5-arylazo-3-cyano-6-hydroxy-2-pyridone dyes / Vesna D. Vitnik in COLORATION TECHNOLOGY, Vol. 133, N° 3 (06/2017)
PermalinkA fast and robust analytical method based on QuEChERS technique using UPLC- PDS for quantification of carcinogenic arylamines in consumer goods inclusive of leather / S. Suresh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 4 (04/2023)
PermalinkNatural dyes in madder (Rubia spp.) and their extraction and analysis in historical textiles / Richard S. Blackburn in COLORATION TECHNOLOGY, Vol. 133, N° 6 (12/2017)
PermalinkA new method for determination of the relative colour strength of dye based on new colour depth formula. Part II: application to different batches of colourant / Wanzi Xie in COLORATION TECHNOLOGY, Vol. 139, N° 1 (02/2023)
PermalinkA new method for determining relative colour strength of dye based on new colour depth formulas. Part I : For different dyes with approximate hue / Wanzi Xie in COLORATION TECHNOLOGY, Vol. 138, N° 5 (10/2022)
PermalinkPurification and characterization of three commercial phenylazoaniline disperse dyes / Gisela A. Umbuzeiro in COLORATION TECHNOLOGY, Vol. 133, N° 6 (12/2017)
PermalinkSolvatochromism and quantum mechanical investigation of disazo pyridone dye / Dusan Mijin in COLORATION TECHNOLOGY, Vol. 134, N° 6 (12/2018)
PermalinkSolvatochromism, halochromism, and azo–hydrazone tautomerism in novel V-shaped azo-azine colorants / Amol S. Choudhari in COLORATION TECHNOLOGY, Vol. 132, N° 5 (10/2016)
PermalinkSpectroscopic analysis of Turkey red oil samples as a basis for understanding historical dyes textiles / Julie H. Wertz in COLORATION TECHNOLOGY, Vol. 134, N° 5 (10/2018)
PermalinkStructural, spectroscopic and computational study of 5-(substituted phenylazo)-3-cyano-1-ethyl-6-hydroxy-4-methyl-2-pyridones / Jelena Mirkovic in COLORATION TECHNOLOGY, Vol. 134, N° 1 (02/2018)
PermalinkStructure and hydrophilicity of azo-dye-derived rotaxane : density functional theory approach / Hyerim Kim in COLORATION TECHNOLOGY, Vol. 133, N° 5 (10/2017)
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