Dehairing enzyme by solid state fermentation / H. Purushotham in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 80, N° 2 (03-04/1996)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 80, N° 2 (03-04/1996) . - p. 52-56 Titre : Dehairing enzyme by solid state fermentation Type de document : texte imprimé Auteurs : H. Purushotham, Auteur ; S. Malathi, Auteur ; P. V. Rao, Auteur ; C. L. Rai, Auteur ; M. M. Immanuel, Auteur ; K. V. Raghavan Année de publication : 1996 Article en page(s) : p. 52-56 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The conventional process of unhairing animal skins/hides by the lime-sulphide process generates enormous problemns in tannery effluent treatment. It has been established that enzymatic unhairing is an environmentally friendly alternative to the conventional process. The enzyme, an alkaline protease (clarizyme) is produced by aspergillus flavus isolate using solid substrate fermentation (SSF). Since SSF has distinct economic advantages over conventional methods, it is hoped that this alkaline protease will be available at a commercially attractive price. Evolution of this enzyme as a depilating agent for goat leather establishes that the enzymatically dehaired skins have better strength compared to the controls. This paper highlights the process development and scaling-up strategies adopted in the enzyme production and its application. En ligne : https://drive.google.com/file/d/18naDBeF5wKDIhAx_jvkFU40lX4cpVNHm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8183 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
007009	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Disintegration of tannery sludge by acoustic cavitation-an approach for sludge management / C. L. Rai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 11 (11/2004)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIX, N° 11 (11/2004) . - p. 457-460 Titre : Disintegration of tannery sludge by acoustic cavitation-an approach for sludge management Type de document : texte imprimé Auteurs : C. L. Rai, Auteur ; A. Sivasamy, Auteur ; P. G. Rao, Auteur Année de publication : 2004 Article en page(s) : p. 457-460 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The sludge biomass, composed largely of organic matter 60-90%(W/V), is contained within the cell wall membranes of microbial cells. It was found that the pressure pulses produced by an ultrasonic homogeniser significantlyinfluenced the degree of disintegration of the cells containing the waste. The mechanical sludge disintegration was investigated with an ultrasonic homogeniser operated at a frequency of 20 kHz with different energy intensities. The influence of sludge solids content on the disintegration of the sludge also was investigated. It was found that the influence of mechanical disintegration on particle size cannot fully describe the release of organic material into the sludge water. The release of organic material into the sludge water can best be estimated by the chemical oxygen demand (COD) and by protein release. The degree of disintegration, as indicated by COD and protein release, increased significantly when the energy intensity applied with the ultrasonic homogenizer was increased. En ligne : https://drive.google.com/file/d/15gr3iGJwJ65bdaytl-9ZImxPrz99hbVD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4227 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001608	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Moisture desorption characteristics of raw sheep and goat skins : A tool for eco-friendly method of preservation / D. Murugan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 2 (02/2013)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 2 (02/2013) . - p. 32-40 Titre : Moisture desorption characteristics of raw sheep and goat skins : A tool for eco-friendly method of preservation Type de document : texte imprimé Auteurs : D. Murugan, Auteur ; C. L. Rai, Auteur ; M. Sivarajan, Auteur Année de publication : 2013 Article en page(s) : p. 32-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Conservation Cuirs et peaux -- Séchage Cuirs et peaux de chèvres Cuirs et peaux de moutons Désorption Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Preservation of animal skins by conventional salt or brine curing methods leads to environmental pollution. Controlled drying up to acceptable moisture levels could be an effective, cleaner and environmentally friendly alternative for skin preservation. The selection of optimum storage and drying conditions requires the knowledge of moisture desorption isotherms. Hence this work focuses on the experimental determination of desorption isotherms for south Indian sheep and goat skins at three different temperatures 30, 40 and 45°C. The goodness of fit of four sorption models to experimental results was determined. Of the models tested, the modified Oswin gave the best fit followed by modified Halsey. Modified Henderson and modified Chung Pfost models showed relatively larger deviations from the experimental values. The deviation was larger in sheep skins compared to goat skins. The net isosteric heat of sorption was determined for both sheep and goat skins using the Clausius - Clapeyron equation and is expressed mathematically as an empirical polynomial function of equilibrium moisture content. The net isosteric heat of sorption for sheep skin was higher than the goat skin. Note de contenu : - EXPERIMENTAL : Materials - Methods (Estimation of free and bound moisture - Pre-drying - Drying studies at thermodynamic equilibrium) - Analysis of sorption data - Determination of heat of sorption - RESULTS AND DISCUSSIONS : Free ant total moisture - Moisture sorption isotherms - Fitting sorption models to experimental isotherms - Heat of sorption En ligne : https://drive.google.com/file/d/1Ze2saxW5H9hEVP6I4SQqh6WKFVpVHst_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17367 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14610	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 3 / 3)