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The characteristics of oxidized lactose-metal complexes and their interaction with collagen / Chen Hui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 5 (09-10/2007)
[article]
Titre : The characteristics of oxidized lactose-metal complexes and their interaction with collagen Type de document : texte imprimé Auteurs : Chen Hui, Auteur ; Li Kai, Auteur ; Li Shu Qing, Auteur ; Shan Zhi-Hua, Auteur Année de publication : 2007 Article en page(s) : p. 193-195 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Analyse spectrale
Analyse thermique
Chrome trivalent
Collagène
Complexes métalliques
Fer
Lactose
Oxydes métalliques
Stabilité hydrothermale
TannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A number of complexes have been synthesized with Cr(III), Al(III) and Fe(II) and oxidized lactose which has carboxyl and aldehyde groups. The complexes were characterized by various spectral and analytical techniques and, based on these data, appropriate structures were estimated for the complexes. Finally, these complexes were reacted with raw collagen under specified conditions and the hydrothermal stability of collagen determined by DSC. It was obvious that these complexes (defined as Rigid Matrices in leather manufacture) do improve the hydrothermal stability of collagen. Note de contenu : - INTRODUCTION : Reagents and instrumentation - Experimental procedures
- RESULTS AND DISCUSSION : UV spectra - FT-IR spectra - Elemental analysis - 13CNMR spectroscopy - DSC determination
- Table 1 : Tanning conditions with complexes and hide powder
- Table 2 : UV spectra of oxidized lactose and its metal complexes
- Table 3 : Assignment of FT-IR spectra of oxidized lactose and its metal complexes
- Table 4 : Elemental analysis results of complexes
- Table 5 : The assignment of oxidized lactose and its metal complexes
- Table 6 : The DSC resultsEn ligne : https://drive.google.com/file/d/1uhoK4z8yolC_oF3DSLTaHUjOye_qvGna/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39011
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 5 (09-10/2007) . - p. 193-195[article]The diversity of the human hair colour assessed by visual scales and instrumental measurements. A worldwide survey / Isabelle Lozano in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 1 (02/2017)
[article]
Titre : The diversity of the human hair colour assessed by visual scales and instrumental measurements. A worldwide survey Type de document : texte imprimé Auteurs : Isabelle Lozano, Auteur ; J. B. Saunier, Auteur ; S. Panhard, Auteur ; G. Loussouarn, Auteur Année de publication : 2017 Article en page(s) : p. 101-107 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Cheveux -- analyse
Colorimétrie
Pigmentation des cheveuxIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Objectives : To study (i) the diversity of the natural colour of the human hair through both visual assessment of hair tone levels and colorimetric measurements of hair strands collected from 2057 human male and female volunteers, from 23 regions of the world and (ii) the correlation between visual assessments and colorimetric measurements.
Methods : Hair strands were analysed by a spectrocolorimeter under the L*, a*, b* referential system and scored in vivo by experts before sampling, through standardized visual reference scales based on a 1–10 range.
Results : Results show that from a typological aspect, black or dark brown hairs largely predominate among studied ethnic groups, whereas Caucasian or derived populations exhibit the widest palette of medium to fair shades, partly explaining some past interbreeding among populations. Instrumental measurements clearly confirm that a given colour of a pigmented hair, at the exclusion of red hairs, is mostly governed by two components, L* and b*, from the L*, a*, b* reference system.
Conclusion : The comparisons between visual assessments and instrumental data show that these appear closely linked. Darker hairs show close or subtle variations in L*, a*, b* parameters, making their individual colour differentiation calling for technical improvements in colorimetric measurements. The latter are likely governed by other physical factors such as shape, diameter and shine.Note de contenu : - MATERIALS AND METHODS : Subjects - Hair sampling - Visual assessments - Colorimetric measurements - Statistics
- RESULTS : Overall analysis through L*, a*, b* axis - Pigmented hairs (non-red, non-white) - Links between instrumental measurements and visual assessments - Pigmented hairs and geographical regions - The case of red hairs - The case of grey hairsDOI : 10.1111/ics.12359 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27849
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 39, N° 1 (02/2017) . - p. 101-107[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18648 - Périodique Bibliothèque principale Documentaires Disponible The effect of caustic soda solutions on fusion-bonded epoxy coatings at high temperatures / Hassan Al-Sagour in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 9 (09-10/2018)
[article]
Titre : The effect of caustic soda solutions on fusion-bonded epoxy coatings at high temperatures Type de document : texte imprimé Auteurs : Hassan Al-Sagour, Auteur ; Mana Al-Mansour, Auteur Année de publication : 2018 Article en page(s) : p. 36-43 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Analyse spectrale
Analyse thermique
Calorimétrie
Décoloration
Diffractométrie de rayons X
Epaisseur -- Mesure
Essais (technologie)
Hydroxyde de sodiumL'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol.
La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude.
Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate.
La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante.
Résistance chimique
Revêtement époxy lié par fusion
Revêtements -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : In the article, "Qualification test for high-temperature FBE coatings" in the July 2018 issue of JPCL, the results of qualification testing of high-temperature fusion-bonded epoxy (FBE) coatings were reported by the authors. This testing involved immersion in different solutions at a high temperature to examine the chemical resistance of various FBE coatings. Three candidate products were immersed at a high temperature and all showed satisfactory performance in distilled water, synthetic sea water and a 5-precent NaCl solution. Most products, however experienced serve discoloration when immersed in a 5-precent NaOH (causic soda) solution.
In this article the authors describe further testing conducted on one of the candidate products to determine the significance of this discoloration. While it is common in the coating industry to condiser discolorationa failure, discoloration has sometimes been claimed a result of the reaction between coloring pigments and test solutions indicating no impact on a coating's properties. Hence, this work has been carried out to more closely examine the source of color change and address the changes in coating properties in more detail.Note de contenu : - The background
- Microscopic examination
- Dry-film thickness
- Pull-off adhesion
- Electrochemical impedance spectroscopy
- X-ray diffraction
- Energy dispersive X-ray spectroscopy
- Differential scanning calorimetry
- Attenuated total reflectance fourier spectroscopy
- Fig. 1 : Cross-section examinqtion qt 80-times magnification. Figures counrtnesy of the author.
- Fig. 2 : Color, DFH and adhesion on Sample 1.
- Fig. 3 : Color, DFH and adhesion on Sample 2.
- Fig. 4 : Color, DFH and adhesion on Sample 3.
- Fig. 5 : DSC scans from panels after immersion in different solutions.
- Fig. 6 : DSC scan of the coating after dry heat.
- Table 1 : DFT, Adhesion and EIS before and after immersion in NaOH solution.
- Table 2 : Composition of the top layer.
- Table 3 : Composition of the intermediate layer.
- Table 4 : Elemental composition comparison (EDX vs. XRD)Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31897
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 9 (09-10/2018) . - p. 36-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20250 - Périodique Bibliothèque principale Documentaires Disponible The effect of photodamage on the female Caucasian facial stratum corneum corneome using mass spectrometry-based proteomics / Rainer Voegeli in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 6 (12/2017)
[article]
Titre : The effect of photodamage on the female Caucasian facial stratum corneum corneome using mass spectrometry-based proteomics Type de document : texte imprimé Auteurs : Rainer Voegeli, Auteur ; J.-M. Monneuse, Auteur ; Rotraut Schoop, Auteur ; B. Summers, Auteur ; Anthony V. Rawlings, Auteur Année de publication : 2017 Article en page(s) : p. 637-652 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Barrière cutanée
Couche cornée
Peau -- Anatomie
Photovieillissement (dermatologie)
ProtéomiqueLa protéomique désigne la science qui étudie les protéomes, c'est-à -dire l'ensemble des protéines d'une cellule, d'un organite, d'un tissu, d'un organe ou d'un organisme à un moment donné et sous des conditions données.
Dans la pratique, la protéomique s'attache à identifier de manière globale les protéines extraites d'une culture cellulaire, d'un tissu ou d'un fluide biologique, leur localisation dans les compartiments cellulaires, leurs éventuelles modifications post-traductionnelles ainsi que leur quantité.
Elle permet de quantifier les variations de leur taux d'expression en fonction du temps, de leur environnement, de leur état de développement, de leur état physiologique et pathologique, de l'espèce d'origine. Elle étudie aussi les interactions que les protéines ont avec d'autres protéines, avec l'ADN ou l'ARN, ou d'autres substances.
La protéomique fonctionnelle étudie les fonctions de chaque protéine.
La protéomique étudie enfin la structure primaire, secondaire et tertiaire des protéines. (Wikipedia)Index. décimale : 668.5 Parfums et cosmétiques Résumé : BACKGROUND :
The effect of photodamage on facial stratum corneum (SC) is still poorly understood.
OBJECTIVE :
To describe the SC proteome from tape strippings of Caucasian SC from photoexposed cheek and photoprotected post-auricular (PA) site, a global analysis of photodamage on the skin will be developed leading to a better understanding of keratinocyte signalling pathways and identification of new molecular targets for the treatment of photoaged skin.
METHODS :
Female Caucasian subjects had nine consecutive tape strippings taken from their cheeks and PA site. Proteins were extracted and the trypsin-digested peptides were analysed by nanochromatography coupled to a high-resolution mass spectrometer. Data-dependent acquisition allowed protein identification that was processed by Paragon algorithm of Protein Pilot software.
RESULTS :
Changes in the levels of epidermal differentiation proteins were apparent indicating poor epidermal differentiation and SC maturation (keratins, cornified envelope (CE) proteins) on photoexposed cheeks. Differences in protease–anti-protease balance were observed for corneodesmolysis (favouring desquamation) and filaggrinolysis (favouring reduced filaggrin processing). 12R-LOX, a CE maturation enzyme, was reduced in photodamaged skin but not transglutaminases. Changes in signal keratinocyte transduction pathway markers were demonstrated especially by reduced levels of downstream signalling markers such as calreticulin (unfolded protein response; UPR) and increased level of stratifin (target of rapamycin; mTOR). Evidence for impaired proteostasis was apparent by reduced levels of a key proteasomal subunit (subunit beta type-6). Finally, key antioxidant proteins were upregulated except catalase.
CONCLUSION :
Clear examples of poor keratinocyte differentiation and associated metabolic and signalling pathways together with reduced SC maturation were identified in photodamaged facial SC. Corneocyte immaturity was evident with changes in CE proteins. Particularly, the reduction in 12R-LOX is a novel finding in photodamaged skin and supports the lack of SC maturation. Moreover, filaggrinolysis was reduced, whereas corneodesmolysis was enhanced. From our results, we propose that there is a poor cross-talk between the keratinocyte endoplasmic reticulum UPR, proteasome network and autophagy machinery that possibly leads to impaired keratinocyte proteostasis. Superimposed on these aberrations is an apparently enhanced mTOR pathway that also contributes to reduced SC formation and maturation. Our results clearly indicate a corneocyte scaffold disorder in photodamaged cheek SC.Note de contenu : - MATERIALS AND METHODS : Study subjects - Sample collection and SC protein evaluation - Protein extraction, digestion and clean up - Nano-liquid chromatography and tandem mass spectrometry - Data analysis and peptide annotation - Statistical analysis
- RESULTS : Serum diffusion linked markers - Proteases and protease inhibitors - Proteins related to SC cohesion - Proteins related to corneocyte maturation - Other enzymes contributing to NMF generation - Differentiation markers: keratins, annexins - Inflammation markers - Membrane trafficking, microtubule and cytoskeleton markers - Proteasome markers - Antioxidant markers - Heat-shock proteins - Signal transduction markers - SC lipid biochemical markers - Anti-microbial peptides - Lysosomal markers - Intermediary metabolism enzymes - Protein folding markers
- DISCUSSIONDOI : 10.1111/ics.12426 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29479
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 39, N° 6 (12/2017) . - p. 637-652[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19393 - Périodique Bibliothèque principale Documentaires Disponible The effect of polyurethane curing conditions on the delamination of pressure sensitive films / B. W. Ludwig in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 839 (12/1994)
[article]
Titre : The effect of polyurethane curing conditions on the delamination of pressure sensitive films Type de document : texte imprimé Auteurs : B. W. Ludwig, Auteur ; M. W. Urban, Auteur Année de publication : 1994 Article en page(s) : p. 59-67 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs sensibles à la pression
Analyse spectrale
Automobiles -- Revêtements:Automobiles -- Peinture
Délaminage
Dioxyde de carbone
Films plastiques
polymères vinyliques
Polyuréthanes
Réticulation (polymérisation)
Revêtements bi-composant:Peinture bi-composantIndex. décimale : 667.9 Revêtements et enduits Résumé : The application of vinyl films as graphics materials to the surface of urethane coatings used in OEM and vehicle refinishes is a common practice. However, if urethane coatings are not properly cured, the vinyl films may delaminate due to the evolution of gases within the coatings. In this study, the influence of curing temperature and time on the extent of delamination observed for several vinyl films having various degrees of permeability was examined. Using a newly developed «photoacoustic umbrella» Fourier transform infrared spectroscopy (PA FTIR) technique, CO2 has been identified as the gas responsible for the delamination of the graphics films. The mechanism of CO2 production and its relationship to the curing conditions are also discussed. Note de contenu : - Coating preparation
- Testing of pressure sensitive vinyl films
- Spectoscopic measurementsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18728
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 839 (12/1994) . - p. 59-67[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003474 - Périodique Bibliothèque principale Documentaires Disponible 003486 - Périodique Bibliothèque principale Documentaires Exclu du prêt The effect of zinc oxide nanoparticles on the weathering performance of wood-plastic composites / Sefa Durmaz in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
PermalinkThe effects of pulse plating variables on morphology and corrosion behavior of Zn–Fe alloy coatings / A. Roshanghias in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 2 (03/2012)
PermalinkThe influence of salicyclic-metal compounds on the hydrothermal stability of collagen / Wang Ya-Juan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 2 (03-04/2008)
PermalinkThe interactions of surfactants with EMPr protease used for leather making : an investigation by multi-spectroscopic analysis and molecular docking / Liang Cheng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 6 (11-12/2021)
PermalinkThe molecular structure of anionic species of 2,4,5,7-tetranitrofluorescein as studied by electrospray ionisation, nuclear magnetic resonance and X-ray techniques / Nicolay O. Mchedlov-Petrossyan in COLORATION TECHNOLOGY, Vol. 134, N° 5 (10/2018)
PermalinkThe natural-based way of hair conditioning / Juntao Xia in PERSONAL CARE EUROPE, Vol. 7, N° 1 (02/2014)
PermalinkThe preparation and study of functionalized graphene oxide/self-healing waterborne polyurethane composites / Zhiqiang Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
PermalinkThe synthesis and spectroscopic characterisation of 3-formyl-2-quinolones in the presence of biothiols / Aleksandra Grzelakowska in COLORATION TECHNOLOGY, Vol. 134, N° 6 (12/2018)
PermalinkThe synthesis, characterisation and molecular structure of a new hetarylazoindole dye studied by X-ray diffraction, spectral analysis and density functional theory calculation / Ebru Aktan in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)
PermalinkThe use of surface imaging for claims support / Chris Pickles in PERSONAL CARE EUROPE, Vol. 9, N° 4 (09/2016)
PermalinkA theoretical and experimental study of the temporal reduction in UV protection provided by a facial day cream / Brian L. Diffey in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 40, N° 4 (08/2018)
PermalinkThermal sensitive agents for making stimuli responsive leathers / Jaya Prakash Alla in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 12 (12/2020)
PermalinkTowards a body hair atlas of women of caucasian ethnicity / Dorothea Schweiger in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 38, N° 4 (08/2016)
PermalinkTowards gradient structures in fluorinated acrylate and polyacrylate blend emulsions / Zhaoxia Yin in SURFACE COATINGS INTERNATIONAL, Vol. 101.4 (08-09/2018)
PermalinkTowards the identification of the volatile organic compounds emitted by the coatings used in a car factory painting line / Pedro Catalao Moura in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
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