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Auteur B. Ramanaiah |
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Ajouter le résultat dans votre panier Affiner la rechercheCosts-effective method for the production of depilation / S. Malathi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 1 (02/1991)
Titre : Costs-effective method for the production of depilation : A cost-effective method for the production of alkaline protease by an aspergillus flavus isolate and its application for the depilation of goat skins Type de document : texte imprimé Auteurs : S. Malathi, Auteur ; R. Chakraborty, Auteur ; K. Parthasarathi, Auteur ; B. Ramanaiah, Auteur Année de publication : 1991 Article en page(s) : p. 33-41 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Solid-substrate fermentation(SSF) of an Aspergillus flavus isolate has been developed for the production of an alkaline protease.Since SSF is known to have distinct economic advantages over conventional methods, it is hoped that this alkaline protease will be available at a commercially attractive price.A study of the properties of the enzyme indicate that it is active over a pH range of 6.5 to 10.5, with a temperature optimum at 45°C.It has high caseinolytic activity and no activity against collagen.Evaluation of this enzyme as a depilating agent for goat skins indicate that its dehairing capacity is satisfactory.Physical testing of the finished leathers of both experimental and control groups, indicates that the enzymically dehaired skins had better strength properties when compared to the controls.Miscroscopic evaluation of the pelts showed that enzymic dehairing compared favorably with the lime-and-sulfide method. En ligne : https://drive.google.com/file/d/1RIYYmyBjJ3XMXnTQPXu0Kvfq6A2DW9mM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8585
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 1 (02/1991) . - p. 33-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006877 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Elimination of hexavalent chromium in leather using reducing agents Type de document : texte imprimé Auteurs : Chandra Babu Narasimhan Kannan, Auteur ; R. Venba, Auteur ; G. Jothi, Auteur ; B. Ramanaiah, Auteur Année de publication : 2005 Article en page(s) : p. 354-359 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The presence of hexavalent chromium, Cr(VI) in leather and leather products has become a source of concern to the leather industry. Consequently research efforts are being made to identify the source of Cr(VI) and eliminate it in finished leathers. This paper deals with the study on the use of reducing agents based on sulfur and phosphonium compounds for elimination of hexavalent chromium in the leathers. Sodium bisulfite and tetrakis-hydroxymethylphosphonium sulfate were found to eliminate hexavalent chromium well below the detectable limit. The performance of these two compounds has also been studied by the external addition of dichromate in processing. En ligne : https://drive.google.com/file/d/1YfoHwIlwzd-Vdq-P7cHMIOIG_2qZ5fQS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4057
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. C, N° 9 (09/2005) . - p. 354-359[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003081 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Fe(III)-Cr(III) combination tannage for the production of soft leathers Type de document : texte imprimé Auteurs : R. Karthikeyan, Auteur ; R. Ramesh, Auteur ; R. Usha, Auteur ; B. Ramanaiah, Auteur ; Chandra Babu Narasimhan Kannan, Auteur Année de publication : 2007 Article en page(s) : p. 383-392 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : There has been a constant search for safer tanning methods for use in leather processing. Due to their similarity in aqueous chemistry, Fe(III) salts are often considered potential alternatives for Cr(III) tanning salts. But Fe(III) tanning methods have certain limitations, which have come in the way of their use in the leather industry. One of the main problems is that iron tanned leathers are less amenable to the production of soft leathers such as garment and gloving leather. In the present study, an attempt has been made to overcome the problems associated with iron tanning for the production of goat suede and sheep nappa garment leathers. A judicious combination with chromium has been attempted and a tanning system that affords good quality leathers at the same time helps in restricting the amount of chromium and iron in the spent liquor to less than 100 mg/L has been standardized. The scanning electron microscopic analysis was carried out on the tanned leathers to study the effect of the new system on the structural characteristics of leathers produced. The strength properties and the color characteristics of the tanned leathers were also analyzed and reported. En ligne : https://drive.google.com/file/d/1w6F9Lp-M7mj7o1RzRGuxXlwasp_mFe_e/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3315
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 12 (12/2007) . - p. 383-392[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008989 - Périodique Bibliothèque principale Documentaires Disponible 009740 - Périodique Bibliothèque principale Documentaires Disponible
