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675 : Technologie du cuir et de la fourrure |
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Titre : Hides and humidity Type de document : texte imprimé Auteurs : Michaela Schroepfer, Auteur ; Michael Meyer, Auteur Année de publication : 2017 Article en page(s) : p. 63-64 Langues : Anglais (eng) Catégories : Analyse thermique
Cuirs et peaux -- Propriétés thermiques
Cuirs et peaux de bovins
Humidité -- Mesure
Tannage au chrome
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The thermal behaviour of bovine skin and wet-blue in varying humidity can be measured by differential scanning calorimetry. The authors discusses the process. Note de contenu : - Materials and mathods
- Chromium-tanned collagen
- Dry state
- Fig. 1. DSC scans of untanned hides at different water contents
- Fig. 2. DSC scans of hide collagen tanned with chromium sulphate at different degrees of hydrationEn ligne : https://drive.google.com/file/d/1Yto3QO8aPrtvnAfBmlOqhXTVwSVlV9o3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29048
in LEATHER INTERNATIONAL > Vol. 219, N° 4874 (09/2017) . - p. 63-64[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19113 - Périodique Bibliothèque principale Documentaires Disponible Hides and skins / Education Committee National Hide Association / Sioux City [Etats-Unis] : National Hide Association (1979)
Titre : Hides and skins Type de document : texte imprimé Auteurs : Education Committee National Hide Association, Directeur de publication, rédacteur en chef ; Edward A. Whitney, Chairman, Directeur de publication, rédacteur en chef ; John (Jack) Minnoch, Editeur scientifique ; Sterling Robert Minnoch Mention d'édition : 3e édition Editeur : Sioux City [Etats-Unis] : National Hide Association Année de publication : 1979 Importance : XI-234 p. Présentation : ill. Format : 23 cm Prix : 25 $ Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : 1. Cattle breeds and characteristics ; hides substances
2. Cattle slaughter, pulling and skinning
3. The hide stripper
4. Inspection, trimming and grading
5. Proper grading important
6. Hide washing, demanuring and fleshing
7. Several methods used in brine curing
8. Hide processor (drum) curing concepts
9. Hide pack building
10. Take up and delivery of hides
11. Preprocessing of hides
12. Preparing hides for chroming
13. The wet blueing process
14. What constitutes A N° 3 hide
15. Calfskins, kipskins and overweights
16. Southern hides
17. Southwerstern hides
18. Hides from the river points
19. Midwestern hides
20. Hides in the far west
21. Bovine inventory, rate of slaughter and, the cattle cycle
22. Will pigskins make it big ?
23. Skinning costs Vs. scalding
24. Characteristics of pigskins
25. Horsehides
26. Sheep pelts
27. The use of salt in curing hides
28. Freeze branding techniques
29. Computerization, card programming, electric eye, key punch
30. Hide curing by solvent dehydration
31. International viewpoints on preserving and processing hides
32. Dehydration of animal hides with ether-alcohol. Quantitative gas liquid chromatographic analysis for ether-alcohol
33. Some problems encountered in the treatment of wastes from the processing of hides and skins
34. Hide analysis and interpretation
35. Rawstock as supplied to the tanning industryPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=1355 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 0375 675 CHA Monographie Bibliothèque principale Documentaires Disponible Hides and skins : temperature and physical change / Richard Daniels in WORLD LEATHER, Vol. 18, N° 5 (08/2005)
[article]
Titre : Hides and skins : temperature and physical change Type de document : texte imprimé Auteurs : Richard Daniels, Auteur ; Walter Landmann, Auteur Année de publication : 2005 Article en page(s) : p. 44 Langues : Anglais (eng) Catégories : Cuirs et peaux -- Effets de la température
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de bovins
Elasticité
PlasticitéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Temperature has a profound influence on the physical properties of hides and skins within every stage of leather manufacture. Apart from increasing the rate of a chemical process, a higher temperature will ease the ability of the skin to stretch under load.
An example is gien as Panel E5/1 where the extension of saturated bovine samples under constant load and rising temperature is shown. Moreover, as the temperature rises, there is an increasing tendency to remain in an extended state.Note de contenu : - Change in bound water
- Deformation of the polypeptide backbone
- Plastic-like behaviour and set as part of leather making
- Panel E5/1 : Effects of temperature on the extension of a sample under constant load
- Panel E5/2 :Loss tangent, tan δ, as a function of temperature for acetone-dried skin samples pre-conditioned in a given relative humidity environment (0, 35, 65% RH)
- Panel E5/3 : Definitions of elastic behaviour and plastic behaviourEn ligne : https://drive.google.com/file/d/11zUlk-yojrN0-_knp3OPvNxPX2RGH9bd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32471
in WORLD LEATHER > Vol. 18, N° 5 (08/2005) . - p. 44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006185 - Périodique Bibliothèque principale Documentaires Disponible Hides, skins and leather under the microscope / The British Leather Manufacturers'Research Association / Egham [United Kingdom] : The British Leather Manufacturers'Research Association (1956)
Titre : Hides, skins and leather under the microscope Type de document : texte imprimé Auteurs : The British Leather Manufacturers'Research Association, Auteur Editeur : Egham [United Kingdom] : The British Leather Manufacturers'Research Association Année de publication : 1956 Importance : 368 p. Présentation : ill. Format : 29 cm Note générale : Index - Glossaire Langues : Anglais (eng) Catégories : Cuirs et peaux Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : 1. Raw hides and skins and their preservation / 2. The soaking of hides and skins / 3. The unhairing and liming of hides and skins / 4. The tanning of hides and skins / 5. Abnormal and unusual conditions in leather / VI. Finished leathers and grain surfaces. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=1711 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 0017 675 HID Monographie Bibliothèque principale Documentaires Disponible High-efficiency bio-degreasing technology for leather making - Characterization of catalytic hydrolysis properties of lipases towards fats based on greasy skin powder substrate / Yongkang Luo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 11 (11/2019)
[article]
Titre : High-efficiency bio-degreasing technology for leather making - Characterization of catalytic hydrolysis properties of lipases towards fats based on greasy skin powder substrate Type de document : texte imprimé Auteurs : Yongkang Luo, Auteur ; Shan Li, Auteur ; Shencai Pan, Auteur ; Chunxian Zhang, Auteur ; Cai Huang, Auteur ; Biyu Peng, Auteur Année de publication : 2019 Article en page(s) : p. 429-439 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Catalyse
Cuirs et peaux -- Dégraissage
Cuirs et peaux de porcs
Hydrolyse
LipasesLes lipases sont des enzymes hydrosolubles capables d'effectuer l'hydrolyse de fonctions esters et sont spécialisées dans la transformation de triglycéride en glycérol et en acides gras (lipolyse). À ce titre, elles constituent une sous-classe des estérases.
Poudre de peauxIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Bio-degreasing technology based on the use of lipases has attracted more attention in the leather industry. Although lipases have been applied in leather making in the past, the previously reported lipase degreasing ratio is still not very high, i.e. less than 60%. In order to correctly understand the mechanism of lipase degreasing and to choose lipases and optimize the degreasing process for achieving efficient degreasing, a novel method of evaluating the catalytic hydrolysis properties of lipases towards skin fats based on a greasy skin powder substrate in an aqueous medium was established. This simulated the actual leather degreasing process and detected the amount of fatty acids produced. The special substrate was prepared; the determination conditions were optimized; then the performances of several typical lipases were evaluated. The results revealed that the lipase performances determined by the novel method were quite different from the standard method using emulsified olive oil substrate. There was a strong product-inhibition characteristic in the catalytic hydrolysis reaction of lipase, and the inhibition concentration of fatty acids varied with the lipase type, thus the maximum hydrolysis ratio of fats was only 67%. The lipases exhibited “super-activity” at pH around 9.5. This occurred because the fatty acids produced transformed into soluble soaps, thus the product-inhibition was weakened. According to the above results, a two-step lipase processing was made, i.e., beginning at pH 7.5 then 9.5. The hydrolysis ratio of fats rose to 82.57% from 46.23%, and the degreasing ratio increased from 50.78% to 89.68%. The new method with better repeatability can be used as a tool to correctly select lipases and optimize process parameters for lipase degreasing. Note de contenu : - EXPERIMENTAL : Materials - Preparation of the pigskin powder substrate rich in grease - Determination of lipase activity based on the prepared greasy skin powder substrate - Optimization of the method to terminate enzyme reaction - Water washing method - Hot drying method - Ethanol termination method - Acidification method - Acidification and water washing method - Absorption of fatty acids by pigskin powder after acidification - Extraction ratio of absorbed fatty acids by dichloromethane - Determination of lipase activity with the standard method - Evaluation of catalytic hydrolysis properties of some lipases towards fats in greasy skin powder - High-efficiency catalytic hydrolysis of fats by lipase and degreasing effect
- RESULTS AND DISCUSSION : Main parameters of the prepared greasy pigskin powder substrate - Optimization of the method to terminate lipase reaction - Impact of acidification on the absorption of fatty acids by pigskin powder - Extraction ratio of fatty acid by dichloromethane - Comparison of the measuring result of lipase activity between the novel and standard methods - Impact of lipase concentration on lipolytic activities of lipases - Impact of reaction time on lipolytic activity of lipases - Effect of temperature on lipolytic hydrolysis of lipaseEn ligne : https://drive.google.com/file/d/1Db6VxRnqj3vXDlsp1w3HSE05ySOJRZs3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33255
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 11 (11/2019) . - p. 429-439[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21341 - Périodique Bibliothèque principale Documentaires Disponible High exhaust acrylic chemistry / Anton El A'mma in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 1 (01/2003)
PermalinkHigh performance acrylic polymer technology for use in leather finishing processes / J. Hoefler in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 8 (08/2013)
PermalinkHigh performance acrylic resins / J. J. Biles in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIX (Année 1984)
PermalinkHigh performance acrylic resins for leather - 2 acrylic topcoating systems / J. J. Biles in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)
PermalinkHigh performance finishing with water-borne transfer systems - Technical note / J. Levy in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 3 (03/1994)
PermalinkPermalinkPermalinkHigh performance strain sensor based on leather activated by micro-cracking conductive layer / Jianzhong Ma in COLLAGEN AND LEATHER, Vol. 5 (2023)
PermalinkHigh quality biodiesel and glycerin from fleshings / Jiri Pecha in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 10 (10/2012)
PermalinkHigh stability organic tanning using plant polyphenols. Part 1 / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 82, N° 2 (03-04/1998)
PermalinkHigh stability organic tanning using plant polyphenols. Part 2 / Bi Shi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 83, N° 1 (01-02/1999)
PermalinkHigh-strength collagen biomaterials / Kenneth E. Hughes in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIII (Année 1988)
PermalinkHistological analysis of the skin dermal components in bovine hides stored under different conditions / S. Montelli in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 2 (02/2015)
PermalinkHistological structure of hides and crossbreeds by italian beef breed bulls and the physical properties of the leather / Piotr Zapletal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 80, N° 4 (07-08/1996)
PermalinkL'histologie : une certaine forme de la connaissance de la peau / J. Prévot in TECHNICUIR, N° 7 (08-09/1973)
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