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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Treatment of beamhouse effluent with an aerobic fixed-film reactor / David G. Bailey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXVI (Année 1981)
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Titre : Treatment of beamhouse effluent with an aerobic fixed-film reactor Type de document : texte imprimé Auteurs : David G. Bailey, Auteur ; Michael H. Tunick, Auteur ; A. A. Friedman, Auteur ; I. Chang, Auteur ; Joseph E. Cooper, Auteur Année de publication : 1981 Article en page(s) : p. 204-215 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : An aerobic fixed-film pilot plant designed to treat high-strenght waste was evaluated for treating beamhouse effluent. Its main advantage is a low space requirement compared to other aerobic systems. Its major drawback is that it must be supplied with oxygen rather than air for full efficiency.
The reactor consisted of a 6-in. ID, 8-ft-high column containing a bed of sand granules approximately 3 ft high. The waste was circulated into the column at a rate of flow that expanded the sand bed only a few inches. The aerobic organisms formed a film on the sand particles. As the density of the combined organisms ans sand grains decreased, the particles became suspended in the circulating fluid in the column. The contents of the column were recycled into a second column containing oxygen under pressure. Dissolved oxygen levels between 5 and 30 ppm were maintained in the system.
Influent was added to the recycling contents of the column at a rate of 1 gal/hr. Column loading rates were changed by increasing or decreasing the strenght of the waste added. Reduction of COD increased as the recycle rate increased from 2.75 to 4.75 gal/min. At the maximum moading rate, 1,300 lb/1,000 cu ft/day, COD removals of over 72 percent were obtained. Kjeldahl nitrogen removal varied, but was generally between 50 and 75 percent. Less than 20 percent of this removal was accounted for as nitrite or nitrate present in the effluent. Sulfide removal was over 98 percent regardless of the concentration in the influent. It is assumed that the sulfide was oxidized to sulfate.Note de contenu : - Start-up - Standard conditions
- Effect of recycle rate on COD removal
- Solids
- TKN
- Sulfide
- pH
- Operation
- Scale-upEn ligne : https://drive.google.com/file/d/1MNvsMQGfCF-u_yPkJ5O-trKOq4etEGQo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17600
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXVI (Année 1981) . - p. 204-215[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008514 - Périodique Archives Documentaires Exclu du prêt Treatment of composite tan liquor / N. B. Prakash in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 2 (02/2003)
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Titre : Treatment of composite tan liquor Type de document : texte imprimé Auteurs : N. B. Prakash, Auteur Année de publication : 2003 Article en page(s) : p. 49-55 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Detailed laboratory studies were carried out to determine the optimum conditions of operation under which anaerobic digestion of tannery effluent could be done. The studies showed that an optimum BOD influent load of 0.3 Kg BOD/m3/day with 3 days retention time could be adopted to yield about 97.1 percent BOD reduction. The role of magnesium carbonate during anaerobic digestion has been studied for methane generation. En ligne : https://drive.google.com/file/d/1avHgFRbgzuhBhNlouN36MrC7Ptr_qNCQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4093
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Code-barres Cote Support Localisation Section Disponibilité 001583 - Périodique Bibliothèque principale Documentaires Disponible Treatment of hides with tara-modified protein products / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 12 (12/2013)
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Titre : Treatment of hides with tara-modified protein products Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; M. B. Medina, Auteur ; J. Lee, Auteur ; Lorelei P. Bumanlag, Auteur ; Nicholas P. Latona, Auteur ; Eleanor M. Brown, Auteur ; Cheng-Kung Liu, Auteur Année de publication : 2013 Article en page(s) : p. 438-444 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Cuirs et peaux -- Propriétés mécaniques
GélatineLa gélatine est une substance solide translucide, transparente ou légèrement jaune, presque sans goût et sans odeur, obtenue par l'ébullition prolongée de tissus conjonctifs (peaux) ou d'os d'animaux (principalement porc, bœuf, poisson). Elle possède de nombreuses applications dans le domaine culinaire, la médecine, les industries agroalimentaire et pharmaceutique.
En matière d’étiquetage, la gélatine est considérée par la norme européenne3 comme un ingrédient et non pas comme un additif, c'est pourquoi elle n'a pas de numéro E. Hors Union européenne, elle est considérée par certains pays comme un additif gélifiant et on peut la trouver avec la dénomination E441.
La gélatine est un mélange de protéines obtenu par hydrolyse partielle du collagène extrait de la peau comme la peau de porc (cochon), des os, des cartilages, etc. Les liaisons moléculaires entre les fibres de collagène sont alors brisées. Mélangée à de l'eau, la gélatine forme un gel colloïdal semi-solide thermo-réversible (il fond lorsqu'il est chauffé et recouvre son aspect gélatineux lorsqu'il est refroidi). Sous forme déshydratée, par contre, la gélatine n'a pas de point de fusion et devient friable ou brûle quand elle est chauffée à trop haute températureLa rhéologie de la gélatine se caractérise par un comportement viscoélastique, et des contraintes trop élevées ou appliquées trop rapidement peuvent entraîner une rupture fragile (fracturation) ou ductile6. Le caractère plutôt élastique/fragile ou plutôt visqueux/ductile dépend de la concentration en gélatine de la solution aqueuse et de la température, ainsi que de la durée de la mise sous contrainteLes acides aminés constituant la gélatine sont : la glycine (21 %), la proline (12 %), l'hydroxyproline (12 %), l'acide glutamique (10 %), l'alanine (9 %), l'arginine (8 %), l'acide aspartique (6 %), la lysine (4 %), la sérine (4 %), la leucine (3 %), la valine, la phénylalanine et la thréonine (2 %), l'isoleucine et l'hydroxylysine (1 %), la méthionine et l'histidine (< 1 %) et la tyrosine (< 0,5 %). Ces valeurs sont variables (surtout pour les constituants minoritaires) et dépendent de la source de matériaux bruts et de la technique de préparation. La gélatine est constituée à environ 98-99 % (en poids sec) de protéines et contient 18 acides aminés dont huit des neuf acides aminés essentiels à l'Homme. Elle n'a qu'une relative valeur nutritionnelle du fait de l'absence de tryptophane et de son déficit en isoleucine, thréonine et méthionine; elle possède également un taux inhabituellement élevé d'acides aminés non essentiels, la glycine et la proline (qui sont produits par le corps humain). (Wikipedia)
Photostabilité
Plantes à tanins
Polyphénols
Tara et constituantsC'est un petit arbre épineux avec des gousses plates rouge qui pousse dans les zones sèches du Pérou, Amérique du Sud.
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)
Wet-white (tannage)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In prior research, we demonstrated that gelatin could be modified with quebracho to produce products whose physicochemical properties would enable them to be used effectively as fillers in leather processing, and that leather resulting from this treatment had improved subjective properties with little effect on mechanical properties. In an extension of the study, the tannin, tara was examined for its potential in gelatin modification. The advantage for using tara is that it gives an almost colorless product, which would be desirable in production of light colored leather, as well as imparting light fastness to the leather. The conditions for optimal tara modification of gelatin were determined and the products characterized. In this present study, these tara-modified gelatins were evaluated as fillers in the treatment of wet blue and wet white. In addition, the rate of uptake of the product was also examined using an analysis developed at ERRC for the measurement of polyphenolics in foods. It was found that the treated leathers, when evaluated for their subjective properties (handle, fullness, break and color), demonstrated improved properties. There were no significant differences in test and control samples of wet blue and wet white, with respect to the mechanical properties (tensile, elongation Young’s Modulus, toughness index and tear strength. SEM examination of fiber structure showed differences in treated and untreated samples. Thus, another sustainable, economical resource, the polyphenolic tara, in conjunction with gelatin, has further shown its potential for use in leather production. Note de contenu : - MATERIALS : Application of tara/gelatin product to wet blue and wet white stock (area samples)
- ANALYSES : Physical properties, mechanical properties and molecular weight distribution - Phenolics assay - Subjective evaluation RCF leather - Optical microscopy (with Epi-fluorescent attachement) - Scanning electron microscopy (SEM)
- PHENOLIC ASSAY FOR TARA
- TREATMENT OF WET BLUE
- PERCENT UPTAKE OF TARA/GELATIN BY WET BLUE
- TREATMENT OF WET WHITE
- PERCENT UPTAKE OF TARA/GELATIN BY WET WHITEEn ligne : https://drive.google.com/file/d/1Az5EN3_kQghq2QrmyWkL_TSTrQFZeBu0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20052
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Code-barres Cote Support Localisation Section Disponibilité 15840 - Périodique Bibliothèque principale Documentaires Disponible Treatment of low-quality hides with fillers produced from sustainable resources : effect on properties of leather / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 10 (10/2009)
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Titre : Treatment of low-quality hides with fillers produced from sustainable resources : effect on properties of leather Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; Joseph Lee, Auteur ; Lorelei P. Bumanlag, Auteur ; Peter H. Cooke, Auteur ; Eleanor M. Brown, Auteur Année de publication : 2009 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Prior research from this laboratory reported on the use of gelatin, alone or in combination with dairy byproducts (casein or whey), as a filler for leather. It was found that all these treatments had fully penetrated the blue stock, were not removed during washing, and had no significant effect on mechanical properties when compared to untreated controls, but did show improvements in the subjective evaluations over the controls with respect to handle, break, dye uptake, and fullness. In this present study we applied these treatments to hides that had grain properties that were characterized as being loose, more commonly known as having spring break, to see if a reduction in these undesirable properties could be realized. The treatments were applied to the butt, belly and neck areas of the hide, and these samples were subsequently retanned, colored and fatliquored (RCF). There were no significant differences between the untreated controls and treated samples with respect to mechanical properties. Importantly, however, it was determined from subjective evaluations, that those commonly inferior areas, such as belly and neck, showed improved cutting area when treated. At the same time, Scanning Electron Microscopy (SEM) was used to compare the blue stock of both poor quality hides and hides evaluated to be of better quality before and after RCF; distinct differences in fiber structure were observed, most dramatically in the belly area. Applying these treatments to low quality hides makes economic sense. Firstly, leathers are produced that present more quality cutting area, and, secondly, these renewable resources have the potential to replace petroleum feedstuffs that are increasingly becoming scarce as well as expensive. En ligne : https://drive.google.com/file/d/195a0m7TyKHnaMTitdRTZZifmK_ymDEqL/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6369
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Code-barres Cote Support Localisation Section Disponibilité 011705 - Périodique Bibliothèque principale Documentaires Disponible Treatment of saltless curing waste using hydrogen peroxide / G. Sekaran in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIII (Année 1988)
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Titre : Treatment of saltless curing waste using hydrogen peroxide Type de document : texte imprimé Auteurs : G. Sekaran, Auteur ; W. Madhavakrishna, Auteur ; K. Chitra, Auteur Année de publication : 1988 Article en page(s) : p. 5-16 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the absence of an effective method of treating soak liquor containing sodium chloride, an alternative curing technique for hides and skins using phenol-borax mixture is discussed. The characterization of spent liquor, first soak liquor and second soak liquor is reported. Anaerobic treatment of phenolic waste liquor does not yield the desired results, but treatment with hydrogen peroxide and a catalyst produced good results. The optimum conditions like pH, phenol : H2O ratio, the catalyst (FeSO4, 7 H2O) and phenol concentrations have been arrived at for the maximum removal of phenol. The residual phenol, after treatment with hydrogen peroxide, can be successfully removed using lime under agitation. En ligne : https://drive.google.com/file/d/1dKytCY4aG987tzUEexlb7b0AWZ21oxCx/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8839
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Code-barres Cote Support Localisation Section Disponibilité 008088 - Périodique Bibliothèque principale Documentaires Disponible Treatment of slaughterhouse wastewater by integrated anaerobic/aerobic bioreactors loaded with immobilized nanoporous activated carbon / P. Maharaja in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 9 (09/2021)
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PermalinkTreatment of wet blue with fillers produced from quebracho-modified gelatin / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 12 (12/2012)
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PermalinkTreatment using both direct and alternating electric currents on hide Bacteria in brine curing and pre-soaking liquors / Yasar Birbir in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 2 (03-04/2014)
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PermalinkTreatments to enhance properties of chrome-free (wet white) leather / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 2 (02/2011)
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PermalinkDe la trempe jusqu'au tannage / E. Winkelmann in REVUE TECHNIQUE DES INDUSTRIES DU CUIR, Vol. LXI (Année 1969)
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PermalinkPermalinkTrivalent chromium, a recyclable raw material of the leather industry : a questionable genotoxic substance / Joseph S. A. Langerwerf in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
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PermalinkTrue meaning of leather / BLC Leather Technology Centre in LEATHER INTERNATIONAL, Vol. 212, N° 4799 (05/2010)
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PermalinkTrying not to go up in flames / BLC Leather Technology Centre in WORLD LEATHER, Vol. 7, N° 1 (02/1994)
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PermalinkPermalinkTwenty-first Procter memorial lecture Procter's text-book of tanning - 1885 : a retrospective review in the centennial year / R. L. Sykes in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)
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PermalinkTwenty-second procter memorial lecture vegetable tannins-renaissance and reappraisal / E. Haslam in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 72 (Année 1988)
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PermalinkTwo stage leather dyeing - A novel approach to minimize the dye discharge in the effluent / N. Vedaraman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 6 (06/2011)
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PermalinkPermalinkTypes and frequency of isolation of bacteria affecting leather surfaces from small nigerian ruminant dermatoses / G. D. Gbolagunte in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 3 (05-06/2010)
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PermalinkTypical defects of natural phospholipid fatliquors in leather industry and their solutions / Zhikun Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 11 (11/2021)
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PermalinkUltra violet treatment process for leather finishing / Tilo Schumacher in WORLD LEATHER, Vol. 15, N° 1 (02-03/2002)
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PermalinkUltrasonic removal of organic pollutants in tannery wastewater / Bi Shi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 3 (03/2002)
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PermalinkUltrasound extraction of valonea tannin and its effects on extraction yield / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 11 (11/2012)
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PermalinkUltrastructural observations of skin samples obtained from various parts of animal and human body / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
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