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Application 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)
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Titre : Application of the extracellular proteases from the culture filtrate of streptomyces Type de document : texte imprimé Auteurs : S. Padmavathi, Auteur ; N. K. Chandrababu, Auteur ; S. Chitra, Auteur ; Gowri Chandrakasan, Auteur Année de publication : 1995 Article en page(s) : p. 88-90 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Confitage enzymatique
Cuirs et peaux
Enzymes microbiennes
Essais (technologie)
Evaluation visuelle
Microscopie
PeptidasesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Laboratory scale experiments were carried out to test the efficiency of the extracellular proteases from the culture filtrate of Streplomyces spp. G157 as a bate. A comparative study was carried out with the commercially available bate. Visual assessment, and microscopic analysis revealed that the extracellular proteases from the culture filtrate of Streptornyces spp. G157 were more efficient than the commercially available bate. Physical testing data indicated that it did not have any adverse effect on the properties of the leather. Note de contenu : - MATERIALS AND METHODS : Organism - Chemicals - Preparation of enzyme for evaluation of its bating action - Evaluation of enzyme for its bating action - Preparation of sample for Scanning Electron Microscopy - Physical Testing
- RESULTS AND DISCUSSION : Visual assessment - Microscopic analysis - Physical testing data
- Table 1 : Physical testing dataEn ligne : https://drive.google.com/file/d/141pz_e_zo3pzM1sTpqHnY9BtUej_HzSV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40048
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 3 (05-06/1995) . - p. 88-90[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007004 - Périodique Bibliothèque principale Documentaires Disponible Interaction of aldehyde developed from amino acids of tannerry waste in a lower-vegetable tannage an eco-friendly approach - Part 2 / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 6 (11-12/2005)
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Titre : Interaction of aldehyde developed from amino acids of tannerry waste in a lower-vegetable tannage an eco-friendly approach - Part 2 Type de document : texte imprimé Auteurs : James Kanagaraj, Auteur ; S. Sadulla, Auteur ; G. S. Raja Kumar, Auteur ; N. K. Chandrababu, Auteur Année de publication : 2005 Article en page(s) : p. 250-256 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants
AldéhydesUn aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle.
L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse.
Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde.
Caractérisation
Chimie analytique
Colorimétrie
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Propriétés physiques
Eaux usées -- Analyse
Liqueurs de tannage
Réticulants
Tannage organique
Tannage végétalIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Fleshings obtained from the liming process were hydrolysed with a proteolytic enzyme and further broken down to the amino acid level before being used to prepare the corresponding aldehyde, which was used as a crosslinking agent.
In the present study the cross-linking agent developed was used to tan the delimed pelt. Subsequently, the leather obtained was tanned with wattle extract at various levels and the combination effect was studied. The tanning studies carried out using the cross-linking agent were discussed in detail in Part I of the paper. Details of the application of the cross-linker aldehyde and its results on pelts as well as with chrome tannage are described in Part 1 of this paper. (J. Soc. Leather Technol. Chem., 2005, 89 (1), 18.) The combination tanning studies with wattle extract at various levels are discussed in this part.Note de contenu : - Materials
- Methods
- Characterisation of cross-linking agent
- Tanning studies
- Table 1 : Characteristics of spent liquor and leather
- Table 2 : Shrinkage temperature and DSC data for the leather
- Table 3 : 1HNMR and FT-IR data
- Table 4 : Total Dissolved Solids (TDS) in various tanning effluent
- Table 5 : Colour measurements
- Table 6 : Colour difference value computed for various experiments when CA treated leather is taken as control
- Table 7 : Physical characteristics of crust leatherEn ligne : https://drive.google.com/file/d/1_VlY4UH2svTJ-6oGkxb3OFRWPiBoul2C/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39215
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 6 (11-12/2005) . - p. 250-256[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire A non-destructive evaluation of fluffiness of leather / M. Muthukrishnan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 8 (08/2017)
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Titre : A non-destructive evaluation of fluffiness of leather Type de document : texte imprimé Auteurs : M. Muthukrishnan, Auteur ; S. M. Jaimohan, Auteur ; M. D. Naresh, Auteur ; R. Ramesh, Auteur ; Rathinam Aravindhan, Auteur ; N. K. Chandrababu, Auteur Année de publication : 2017 Article en page(s) : p. 263-269 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Confort
Contrôle non destructif
Cuirs et peaux -- Analyse
MesureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Many of the comfort related properties of leather are generally assessed subjectively by experience sorters. Fluffiness is one such comfort related property of leather which not only gives volume to the leather, but provides insulation because of entrapped air. The testing method reported in this paper is a new concept in the objective measurement of the fluffiness of leather which is non-destructive in nature and should be valuable to the leather industry. Note de contenu : - Objective assessment
- Porosity
- Fluffiness mapping
- Internal structureEn ligne : https://drive.google.com/file/d/16mYPw_Dy3m7hNmNVwkAQ3CFR54-eOf8Q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28825
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Code-barres Cote Support Localisation Section Disponibilité 19156 - Périodique Bibliothèque principale Documentaires Disponible Role of anionic chromium species in leather tanning / Kumar Abhinandan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 10 (10/2021)
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Titre : Role of anionic chromium species in leather tanning Type de document : texte imprimé Auteurs : Kumar Abhinandan, Auteur ; Jaya Prakash Alla, Auteur ; Deepika Arathanaikotti, Auteur ; Ashok Raj J., Auteur ; N. K. Chandrababu, Auteur Année de publication : 2021 Article en page(s) : p. 368-373 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anions
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Eaux usées -- Analyse
Microscopie électronique à balayage
Taille des particules
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome tanned leathers are definitely unique in comparison with leather made from any other known tanning agents, especially in terms of thermal stability, cost and its reactive mechanism with collagen fibers. In our current studies, self basifying chrome tanning materials masked with different percentages of organic acid were prepared and applied after the de-liming stage of leather processing. This eliminated the need for pickling and basification steps. Tanned leathers resisted shrinkage up to 103 and 105±2°C while conventional chrome tanned leathers resisted up to 108±2°C. Also, interaction of anionic chrome species in tanning was studied. It was observed that the percentage of anionic species in the experimental chrome tanning material was higher than conventional chrome tanning material and the shrinkage temperature achieved by application of experimental tanning material proves that anionic species do involve in tanning. Tanned leathers were crusted and analysed for strength and organoleptic properties. Note de contenu : - EXPERIMENTAL SECTION : Reagents - Preparation of tanning material - Anion exchange chromatography - Particle size - Application as tanning material - Exhaustion studies and wastewater analysis - Scanning electron microscopy (SEM) analysis - Physical strength properties and organoleptic properties
- RESULTS AND DISCUSSION : Speciation of chrome liquor prepared - Analysis of tanning material - Leather application - Scanning electron microscopy analysis - Exhaustion and wastewater analysis - Strength and organoleptic properties
- Table 1 : Process employed for control and experimental chrome application
- Table 2 : Ion exchange chromatography of chrome species
- Table 3 : Comparison of wet blue leathersDOI : https://doi.org/10.34314/jalca.v116i10.4618 En ligne : https://drive.google.com/file/d/1FyFXTw0BUCV9Me9-fysJn1ImFbomD5zu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36408
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Code-barres Cote Support Localisation Section Disponibilité 23019 - Périodique Bibliothèque principale Documentaires Disponible Studies on ethiopian sheep skins as an opportunity for value addition part I : histological, microscopic and chemical characterization of abyssinian and wanke sheepskins / H. Mohammed in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 3 (03/2014)
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Titre : Studies on ethiopian sheep skins as an opportunity for value addition part I : histological, microscopic and chemical characterization of abyssinian and wanke sheepskins Type de document : texte imprimé Auteurs : H. Mohammed, Auteur ; G. Aysanew, Auteur ; Rathinam Aravindhan, Auteur ; A. Gnanamani, Auteur ; Jonnalagadda Raghava Rao, Auteur ; N. K. Chandrababu, Auteur Année de publication : 2014 Article en page(s) : p. 76-81 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Chimie
Cuirs et peaux -- Analyse
Cuirs et peaux de moutons
Microscopie électronique à balayage
Peau -- HistologieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The leather industry is one of the priority sectors in Ethiopia, which has been identified as potentially competitive in the global market. Ethiopian tanners face a shortage of raw material input for production of leather. The government strategically planned for importing raw skins from neighboring countries and also for effective utilization of available raw material resources in the country. About fourteen sheep breeds are recognized in Ethiopia. Among the available resources, Wanke sheepskins, indigenous to lowland of Ogaden area of Somali Region take prime position based on their availability. Meat of Wanke sheep is in high demand in international market, but the skin commands low price not only due to availability but also less demanded by tanners due to natural problems associated with the skin. In this paper the histological, chemical and physical characteristics of Wanke sheepskins have been analyzed using various tools and techniques. This characteristic understanding of the Wanke sheepskins will enable the development of process strategy to produce Wanke leathers with improved properties. Note de contenu : - Challenges of ethiopian leather industry
- MATERIALS AND METHODS : Characterization of sheepskins - Grain surface pattern
- RESULTS AND DISCUSSION : Hair pore count - Histological analysis - Scanning electron microscopy analysis - Chemical characteristicsEn ligne : https://drive.google.com/file/d/1t0c6mQiZ3wXQk7XitHzZpEovicFXYfKW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20718
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Code-barres Cote Support Localisation Section Disponibilité 16086 - Périodique Bibliothèque principale Documentaires Disponible