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Application of modulated temperature differential scanning calorimetry (MTDSC) on leather / Richard L. Edmonds in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 6 (11-12/2016)
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Titre : Application of modulated temperature differential scanning calorimetry (MTDSC) on leather Type de document : texte imprimé Auteurs : Richard L. Edmonds, Auteur Année de publication : 2016 Article en page(s) : p. 283-288 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 thermique
Calorimétrie
Calorimétrie différentielle à température modulée
Cuirs et peaux -- Analyse
Oxazolidine
Peaux brutes
Tannage au chrome
Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium
Température de retrait
Wet-white (tannage)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Measurement of collagen denaturation by differential scanning calorimetry is commonly used for the study of the shrinkage reaction in feather. In this work, the shrinkage reaction of leather was examined for the first time using modulated temperature differential scanning calorimetry (MTDSC). The shrinkage reaction was first measured using conventional differential scanning calorimetry (DSC) and the parameters for leather shrinkage used to develop the parameters for the application of MTDSC to leather samples. Trials with leather confirm the irreversible nature of the shrinkage reaction within the experimental protocol used. Note de contenu : - EXPERIMENTAL PROCEDURES : Raw skin - Pickle process - Chrome-tanned wet-blue - Aluminium-tanned wet-white - Oxazolidine-tanned wet-white
- RESULTS AND DISCUSSION : MTDSC operation and optimisation - Modulation period - Temperature modulation heating rate - Temperature modulation amplitudeEn ligne : https://drive.google.com/file/d/1rv98zxmy4mq2UaklkmBhs2e4BGJRBXsk/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27612
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 6 (11-12/2016) . - p. 283-288[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18546 - Périodique Bibliothèque principale Documentaires Disponible Application of molecular techniques to identify bacteria isolated from the leather industry. Discussion / David Oppong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 4 (04/2006)
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Titre : Application of molecular techniques to identify bacteria isolated from the leather industry. Discussion Type de document : texte imprimé Auteurs : David Oppong, Auteur ; Stephen D. Bryant, Auteur ; Ravindran Rangarajan, Auteur ; Susan Steele, Auteur ; David Radwell, Auteur ; Lori Hyllengren, Auteur Année de publication : 2006 Article en page(s) : p. 140-145 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : DNA-based methods are known to be accurate, precise and rapid in identifying bacteria but there is little information about the use of these techniques in the leather industry. A study was undertaken to investigate and characterize the bacterial contaminants of fresh hides using 16S ribosomal RNA sequencing techniques. The proteolytic activities of these isolates were also studied using different substrates. Organisms belonging to 16 different genera of bacteria were isolated, and many of the species found have not been previously reported for this environment. Some of the species of bacteria being reported for the first time in the tanning environment included Janibacter terrae, Acidovorax sp., Dietzia maris, Arthrobacter pr tophormiae, Comamonas sp., Brevibacterium lutescens, Jeotgalicoccus psychrophifus, Nocardiopsis sp., Delftia acidovorans, Pseudomonas cannabina, Pseudomonas fulgida and certain species of Aeromonas and Acinetobacter. Most species of bacteria found in the incoming process water were non-proteolytic. Analysis of fresh hides revealed a large number of both proteolytic and non-proteolytic bacteria. The proteolytic bacteria included several species of Aeromonas, Proteus vulgaris, and Shewanella putrefaciens. Pseudomonas sp. were common but not all of them showed proteolytic activity. Knowledge about the identities and proteolytic activities of these organisms that occur in this environment would provide a better way to design programs to control theirundesirable activities. En ligne : https://drive.google.com/file/d/1W6m6QBqQgEHmOjGdvy_Z9dJA7dyTqpd0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4017
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Code-barres Cote Support Localisation Section Disponibilité 004230 - Périodique Bibliothèque principale Documentaires Disponible Application of N-(2-hydroxy) propyl-3-trimethyl ammonium chitosan chloride as an antibacterial and antifungal agent in wet-blue cattle hides in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)
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Titre : Application of N-(2-hydroxy) propyl-3-trimethyl ammonium chitosan chloride as an antibacterial and antifungal agent in wet-blue cattle hides Type de document : texte imprimé Année de publication : 2014 Article en page(s) : p. 264-268 Langues : Anglais (eng) Catégories : Antibactériens
Antifongiques
Cuirs et peaux -- Conservation
Cuirs et peaux de bovins
Evaluation
Tests d'efficacité
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : N-(2-Hydroxy) Propy1-3-Trimethyl Ammonium Chitosan Chloride (HTCC) has better water-solubility than Chitosan (CS), and ils solubility no longer depends on the change of solvent pH, The minimum bactericidal concentration (MBC) of HTCC to Escherichia (E. coli) is 6g/L whereas the MBC for CS is 9g/L, and the value for Staphylococcus aureus (S. aureus) is 3g/L_ for HTCC and for CS it is 6g/L. The optimal pH of HTCC to E. coli is 8.0 whereas the optimal pH for CS is 6.0, and the pH value for S. aureus is 7.0 for HTCC whereas that for CS is 6.0. So HTCC has better antibacterial properties and solubility.
Wet-blue cattle hides were treated with HTCC for antibacterial and antifungal effects. The inhibition against Escherichia Poli, S. aureus, Aspergillus figer, Aspergillus flavus and blue mould were investigated through an orthogonal design. The results showed that the treated wet-blue cattle hides possessed good antibacterial and antifungal properties. Correspondingly, the optimum treating conditions of the antibacterial process were a float of 100% with a dosage of 0.4% at pH4.0, below 50°C, reacting for 1.0 hour. The optimized antifungal process was a float of 150% with dosage of 0.2% at pH5.0, below 40°C, reacting for 2 hours.Note de contenu : - MATERIALS AND METHODS : Materials - Water solubility of HTCC - Antibacterial activity of HTCC to Escherichia coli and Staphylococcus aureus - Processing method for hides - Antibacterial test - Antifungal test - Data processing
- RESULTS AND DISCUSSION : Water solubility of HTCC and CS - The antibacterial activity of CS and HTCC to E. coli - The antibacterial activity of CS and HTCC to S. aureus - Results of antibacterial tests - Results of antifungal testsEn ligne : https://drive.google.com/file/d/1yuVLNXyS6TX5tHDxYop14SYrt9so6kOD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22648
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 264-268[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16734 - Périodique Bibliothèque principale Documentaires Disponible Application of power ultrasound in the fatliquoring process / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 5 (05/2005)
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Titre : Application of power ultrasound in the fatliquoring process Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; P. G. Rao, Auteur ; G. Swaminathan, Auteur Année de publication : 2005 Article en page(s) : p. 187-195 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fatliquoring experiments have been carried out with ultrasound under stationary conditions and compared with the process in the absence of ultrasound under stationary as well as dynamic drumming condition. Type of fatliquors such as vegetable, semi synthetic and synthetic fatliquors have been studied. Variation in process parameters like ultrasonic output power, amount of fatliquor, and temperature have also been studied. The results show improvement about 2.5, 1.8, 1.5 times in the fat uptake in leather due to ultrasound for vegetable, semi synthetic and synthetic based fatliquors respectively. The observed order of improvement, vegetable > synthetic fatliquor is in agreement with the hindrance generally expected for fatliquors during penetration as indicated by emulsion particle size and Gel Permeation Chromatography (GPC) data. Therefore, ultrasound is useful for more difficult fatliquoring conditions. The results also indicate that ultrasound under stationary conditions is comparable or better than dynamic drumming conditions. The effects of ultrasound due to pre-sonication and on the viscosity of the fatliquor have also been studied. Leather fiber stricture has been analyzed using Scanning Electron Microscopy (SEM) and found to be more regular and improved by ultrasound aided processing. The studies indicate ultrasound promotes effective emulsification of the fatliquor in water systems rendering better penetration and more uniform distribution through the leather matrix. En ligne : https://drive.google.com/file/d/1m_KAS6enFsf1LaFgGKXa8k_DP2hl_vJy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4066
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Code-barres Cote Support Localisation Section Disponibilité 002056 - Périodique Bibliothèque principale Documentaires Disponible Application of protein hydrolysate from chrome shavings for polyvinyl alcohol-based biodegradable material / Martina Kresalkova in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 4 (04/2002)
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Titre : Application of protein hydrolysate from chrome shavings for polyvinyl alcohol-based biodegradable material Type de document : texte imprimé Auteurs : Martina Kresalkova, Auteur ; Karel Kolomaznik, Auteur ; J. Kupec, Auteur ; L. Hnanickova, Auteur Année de publication : 2002 Article en page(s) : p. 143-149 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The use of hydrolysate from chrome-tanned wastes for producing biodegradable plastics particularly applicable in agriculture requires management of the breakdown of modified compounds of synthetic polymers. In this work, the additive applied for this purpose was protein hydrolysate produced by enzymatic hydrolysis of chrome-tanned shavings. It was used for modifying polyvinyl alcohol which had been processed into water-soluble films often employed in agriculture. This material, after being deposited in soil, undergoes biological degradation (first of all anaerobic) which is supported to a large extent by the addition of protein hydrolysate in particular. For this reason, anaerobic biodegrability tests were performed (volumetric test determining methanogenic activity) and the corresponding percentage of degradation was determined based on a balance of produced biogas and inorganic carbon in the aqueous phase. Polyvinyl alcohol is relatively poorly degradable under aerobic conditions while protein hydrolysate, on the contrary, undergoes biodegradation at a fairly fast rate. From a comparison between the attained degradation degree of blow-extruded film and that of mechanically prepared compounds it follows that the limiting factor of degradability, apart from added protein hydrolysate, is also a chemical reaction between polyvinyl alcohol and hydrolysate taking place during the heat processing of film. It was confirmed that protein hydrolysate from chrome shavings markedly increases biodegradation of material (depending on its content in the plastic matrix), reduces the final cost of product and, last but not least, to some extent also exerts a positive influence on mechanical properties of the film. En ligne : https://drive.google.com/file/d/1DG9POYCMMG1n3uWy8vr5u2otxOhr9-u2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4312
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Code-barres Cote Support Localisation Section Disponibilité 001573 - Périodique Bibliothèque principale Documentaires Disponible Application of soluble silicates in leather production / K. Munz in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 2 (02/2005)
PermalinkApplication of some plant extracts as biocolorants for leather during finishing process / Roza Mirzamuratova in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 1 (01/2024)
PermalinkApplication of surfactants in leather making with nano-tech / Ma Jianzhong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 2 (03-04/2005)
PermalinkApplication of texture profile analysis (TPA) to evaluate the sensory properties of leather / Piotr Zapletal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 3 (05-06/2016)
PermalinkApplication of the extracellular proteases from the culture filtrate of streptomyces / S. Padmavathi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 3 (05-06/1995)
PermalinkApplication of the hypothesis analysis method using Cohen's Kappa index to measure the agreement between leather sorters / Patricia Casey in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 4 (07-08/2010)
PermalinkApplication of titanium metal oxide nanoparticles for leather coating / Sivaraj Sudhahar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 3 (03/2013)
PermalinkApplication of tocopherol to improve the durability of leather / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 10 (10/2003)
PermalinkApplication of ultrasound in eco-friendly fatliquoring of leather / Mohamed Abu Sayid Mia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 3 (03/2024)
PermalinkApplication on information entropy to defect characterisation in leather / F. Carvalho-Rogrigues in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)
PermalinkL'application du système M.T.M. dans l'industrie de la chaussure / Dr. Helms in TECHNICUIR, N° 1 (01/1978)
PermalinkApplying electric current to inactivate gram-negative bacteria isolated from salt-packed-cured hides / Yasar Birbir in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 1 (01-02/2013)
PermalinkApproach towards safe and efficient enzymatic unhairing of bovine hides / Mei Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 2 (02/2018)
PermalinkApproach towards zero discharge tanning : exploration of NaOH based opening up method / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 6 (06/2001)
PermalinkAQEIC BOLETIN TECNICO / Asociación QuÃmica Española de la Industria del Cuero / Barcelona [Espagne] : Asociación QuÃmica Española de la Industria del Cuero
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