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The quantitative calculation between chrome technological parameters in leather making and chrome absorptivity / E. Tao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 2 (03-04/2014)
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Titre : The quantitative calculation between chrome technological parameters in leather making and chrome absorptivity Type de document : texte imprimé Auteurs : E. Tao, Auteur ; Ma Hong-Rui, Auteur ; Chang Hao, Auteur Année de publication : 2014 Article en page(s) : p. 63-68 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie)
Calcul
Chrome trivalent -- Absorption
Tannage au chromeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The relationship between the single technological parameter and chrome absorptivity [percentage of total chrome absorbed] based on laboratory tests and process manual data was studied. Stepwise regression analysis was employed to obtain the quantitative correlation between tanning parameters and chrome absorptivity, on the basis of establishing a relationship between multi-process parameters and comprehensive factors of chromium binding capacity using commercial tanneries actual measurements as contrast. The results showed that, the quantitative calculation of chrome absorptivity through technological parameters could absolutely reflect the actual situation in the tanning process amongst the multiple steps in the heterogeneous and mixed systems contained in the leather making processes. Note de contenu : - DESIGN OF CHROME ABSORPTIVITY EQUATION (Percentage of chrome absorbed). Quantitative calculation equation : Process of chrome absorptivity quantitative calculation - Factors having influence on quantitative chrome absorptivity calculation
- RESULTS AND DISCUSSION : Effects of single process parameters on the chrome absorptivity of leather - Establishment of the relationship between the comprehensive factors of chrome binding capacity - Establishement of quantitative calculation and experimental verification of chrome absorptivityEn ligne : https://drive.google.com/file/d/1skYx6Pz8VPKsEQbNGU2P22dv_IqfkxKb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21136
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 2 (03-04/2014) . - p. 63-68[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16193 - Périodique Bibliothèque principale Documentaires Disponible Ultrasonic atomisation : A novel technique for surface coatings / S. G. Gaikwad in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B3 (09/2005)
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Titre : Ultrasonic atomisation : A novel technique for surface coatings Type de document : texte imprimé Auteurs : S. G. Gaikwad, Auteur ; C. Reddy V., Auteur ; A. B. Pandit, Auteur Année de publication : 2005 Article en page(s) : p. 189-196 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse qualitative (chimie)
Analyse quantitative (chimie)
Atomisation
Dépôt par pulvérisation
Epaisseur -- Mesure
Gouttelettes
Revêtement de surface
UltrasonsIndex. décimale : 667.9 Revêtements et enduits Résumé : In this work, ultrasonic atomisation as a possible spray coating on a moving surface has been studied. The experimental method employed here involved the spraying of ink vertically downwards onto a paper, which was moving laterally. It was found that the percentage area of the covered surface increased with an increase in the height of the ultrasound atomiser from the surface and the vibrational amplitude of the atomiser, while the liquid film thickness on the coated surface decreased with an increase in the height of the ultrasound atomiser, vibrational amplitude of the atomiser and the linear velocity of the moving surface. Also, it was observed that the percentage area as well as the liquid film thickness increased with an increase in the liquid flow rate irrespective of changes in other parameters. The increase in the viscosity of the spraying liquid reduced the area covered by the spray for surface coating, while it increased the coating film thickness. Note de contenu : - EXPERIMENTATION : Experimental set-up - Amplitude control of the ultrasonic atomiser - Experimental conditions - Analysis
- RESULTS AND DISCUSSION : Qualitative analysis - Quantitative analysisDOI : 10.1007/BF02699572 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699572.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5415
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 88, B3 (09/2005) . - p. 189-196[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003027 - Périodique Bibliothèque principale Documentaires Disponible Unhairing of bovine skin with fungal enzymes by immersion and spread throughout the epidermis / Maria Laura Garro in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 1 (01-02/2019)
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Titre : Unhairing of bovine skin with fungal enzymes by immersion and spread throughout the epidermis Type de document : texte imprimé Auteurs : Maria Laura Garro, Auteur ; Betina Galarza, Auteur ; Carlos Greco, Auteur ; Roque Hours, Auteur Année de publication : 2019 Article en page(s) : p. 28-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie)
Caractérisation
Cuirs et peaux de bovins
Diffusion (physique)
Enzymes fongiques
Epiderme
Epilage enzymatique
Immersion
Microscopie électronique à balayage
Travail de rivière (cuir)Index. décimale : 668.5 Parfums et cosmétiques Résumé : The use of enzymes during unhairing in the leather industry to partially reduce sulfide can decrease H2S emission to almost 50%. However the proteolysis needs to be controlled to prevent collagen damage. In bovine epidermis, the stratum corneum plays a crucial role as a hydrophobic barrier. In order to facilitate the diffusion of enzymes, it is necessary to generate channels through this barrier to allow enzymes pass without damaging the collagen. In an ideal enzymatic unhairing the proteolytic activity should be restricted to the basal lamina and pilosebaceous unit. During this experiment, fungal enzyme extracts (CE) were applied on bovine skin in the soaking and unhairing steps as part of the tanning process. The skin contacted with the solutions in two different ways : in direct contact with the epidermis (Mode I) and immersed in the solution (Mode II). Various keratinolytic fungi, previously isolated and selected from different soil samples were used : Neurospora crassa, Verticillium albo-atrum, Trichophyton ajelloi, Chrysosporium sp, Aspergillus sydowii, Paecilomyces lilacinus and Acremonium murorum. The fungal isolates were cultivated under solid state conditions using hair waste obtained from the hair-saving unhairing process as substrate. Enzyme extracts were characterized according to their keratinolytic and proteolytic activity and protein content. Once the immersion with fungal enzymes was finished, the treatment with N. crassa, T. ajelloi, Chrysosporium sp, A. sydowii and P. lilacinus, showed unhaired skin and epidermis removed. After the contact between the epidermis and fungal enzymatic extract of T. ajelloi empty hair follicles were observed. The morphological changes were studied with SEM (Scanning Electron Microscopy). Note de contenu : - INTRODUCTION : Epidermis - Basal lamina - Dermis - Objectives
- MATERIALS AND METHODS : Fungal strains isolates : culture and characterization - Assessment of protein content and proteolytic activity - Assay of proteolytic and keratinolytic activities - Mode I. Permeability assay of bovine skin epidermis with fungal enzyme extracts - Epidermis - Basal lamina - Dermis - Objectives
- MATERIALS AND METHODS : Fungal strains isolates : culture and characterization - Assessment of protein content and proteolytic activity - Assay of proteolytic and keratinolytic activities - Mode I. Permeability assay of bovine skin epidermis with fungal enzyme extracts - Control wells - Mode II. Assay with bovine skin immersed in the solutions - Control tubes - Scanning electronic microscopy (SEM) protocol
- RESULTS AND DISCUSSION : Assay of proteolytic and keratinolytic activities - SEM observationEn ligne : https://drive.google.com/file/d/1ym8R2Zy2q7HOf8f4HNvldFgm04pmesC6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31790
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 1 (01-02/2019) . - p. 28-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20620 - Périodique Bibliothèque principale Documentaires Disponible When the color doesn’t match / Frank Claussen in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 4 (04/2012)
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Titre : When the color doesn’t match Type de document : texte imprimé Auteurs : Frank Claussen, Auteur Année de publication : 2012 Article en page(s) : p. 18-20 Langues : Anglais (eng) Catégories : Analyse quantitative (chimie)
Matières plastiques -- Coloration
Spectroscopie de fluorescenceIndex. décimale : 668.4 Plastiques, vinyles Résumé : Color Masterbatches - The exact dosing of masterbatches can be quickly and effectively measured in colored parts using x-ray fluorescence analysis. The process requires only a few minutes, is nondestructive and complements existing methods used to check dosing. Note de contenu : - Seeking the sources of errors
- Checking dosage
- Determination of the ash content
- Analysis of the elementsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15086
in KUNSTSTOFFE INTERNATIONAL > Vol. 102, N° 4 (04/2012) . - p. 18-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13841 - Périodique Bibliothèque principale Documentaires Disponible Where do dyes go inside living cells ? Predicting uptake, intracellular localisation, and accumulation using QSAR models / Richard W. Horobin in COLORATION TECHNOLOGY, Vol. 130, N° 3 (06/2014)
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Titre : Where do dyes go inside living cells ? Predicting uptake, intracellular localisation, and accumulation using QSAR models Type de document : texte imprimé Auteurs : Richard W. Horobin, Auteur Année de publication : 2014 Article en page(s) : p. 155-173 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie)
Colorants -- Absorption
Colorants -- Toxicologie
QSAR (biochimie)Une relation quantitative structure à activité (en anglais : Quantitative structure-activity relationship ou QSAR, parfois désignée sous le nom de relation quantitative structure à propriété - en anglais : quantitative structure-property relationship ou QSPR) est le procédé par lequel une structure chimique est corrélée avec un effet bien déterminé comme l'activité biologique ou la réactivité chimique.
Ainsi, l'activité biologique peut être exprimée de manière quantitative, comme pour la concentration de substance nécessaire pour obtenir une certaine réponse biologique. De plus lorsque les propriétés ou structures physiochimiques sont exprimées par des chiffres, on peut proposer une relation mathématique, ou relation quantitative structure à activité, entre les deux. L'expression mathématique obtenue peut alors être utilisée comme moyen prédictif de la réponse biologique pour des structures similaires.
La QSAR la plus commune est de la forme : activité = f(propriétés physico-chimiques et/ou structurales).
Toxicologie cellulaireIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Uptake of dyes into living cells and organisms is of concern to several diverse groups of people. These include those not wishing dyes to enter cells (e.g. manufacturers and users of textile dyes, or laboratory workers using dyes as analytical reagents) and those requiring dye entry (e.g. biologists imaging cell contents, or clinicians using photoactive dyes as antitumour drugs). This diversity results in the need to consider an extremely wide range of dyes – and indeed of cells and organisms. An overview of methods for predicting uptake and intracellular localisation is provided, followed by a more detailed account of the concepts and procedures involved in decision?rule quantitative structure–activity relationship (QSAR) models. Some of these models permit the prediction of which dyes are likely to enter cells, and which dyes will be excluded. Other models predict where internalised dyes will localise within the live cells. Use of QSAR models to understand intracellular accumulation, redistribution, loss from the cell, and metabolic modification of dyes is also considered. In particular, the relationship of such predictions to toxicity is discussed. An extended case example is provided, describing the modelling of dye binding to nucleic acids in single?cell systems. A further case example then illustrates dye localisation in multicellular organisms. Finally, conclusions, critiques, and probable future directions concerning the QSAR modelling approach to dye uptake and localisation are given. A summary of key QSAR decision rules in the form of decision logic tabulations is provided. Note de contenu : - WHO NEEDS TO KNOW - AND DOES IT MATTER - WHERE DYES GO ?
- WHICH TYPES OF DYE ARE CONSIDERED HERE ?
- WHICH CELLS (AND ORGANISMS) ARE OF CONCERN ? AND IN WHAT CONTEXT ?
- METHODS OF PREDICTING UPTAKE AND LOCALISATION, A BRIEF INTRODUCTION
- PREDICTIVE DECISION-RULE QSAR MODELS : CONCEPTS AND PROCEDURES
- WHICH DYES ENTER CELLS, AND WHICH DO NOT ? PREDICTING THE DIFFERENCES
- WHERE DYES GO INSIDE LIVE CELLS ? PREDICTING LOCALISATION : What are the start points - Possibility 1 : no further dye redistribution - Possibility 2 : dye redistribution occurs - Endoplasmic reticular membranes - Generic biomembranes - Golgi apparatus membranes - Lipid droplets - Lysosomes/acidic organelles - Mitochondria - Nuclear chromatin - Nucleolar and cytoplasmic ribosomal dsRNA - Phagosome - Localisation in organelles, some complications
- WHAT HAPPENS NEXT ? THE VARIED FATES OF DYES WITHIN CELLS : Accumulation - Redistribution, following damage to cells - Loss of dye from cells - Metabolism of dyes
- HOW DOES ALL THIS RELATE TO TOXICITY ?
- CASE EXAMPLE 1 - PREDICTING DYE ACCUMULATION IN NUCLEIC ACID-RICH SITES WITHIN SINGLE-CELL EUKARYOTIC SYSTEMS
- CASE EXAMPLE 2 - PREDICTING DYE LOCALISATION IN MULTICELLULAR ORGANISMS
- CONCLUSIONS, CRITIQUES, AND FUTURE DIRECTIONSDOI : 10.1111/cote.12093 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12093 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21443
in COLORATION TECHNOLOGY > Vol. 130, N° 3 (06/2014) . - p. 155-173[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16271 - Périodique Bibliothèque principale Documentaires Disponible X-ray computed tomography for assessment of mechanical properties and monitoring damage / Abderrahmane Ayadi in JEC COMPOSITES MAGAZINE, N° 113 (06/2017)
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