Accueil
Détail de l'auteur
Auteur S. Sadulla |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
Coloring of leather using henna - natural alternative material for dyeing / A. E. Musa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 5 (05/2009)
[article]
Titre : Coloring of leather using henna - natural alternative material for dyeing Type de document : texte imprimé Auteurs : A. E. Musa, Auteur ; Balaraman Madhan, Auteur ; W. Madhulatha, Auteur ; Jonnalagadda Raghava Rao, Auteur ; G. A. Gasmelseed, Auteur ; S. Sadulla, Auteur Année de publication : 2009 Article en page(s) : p. 183-190 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Synthetic dyes are widely used in the leather industry; some of these are carcinogenic in nature. Environmental concern leads one to seek dye products based on natural resources, which have several advantages like less toxicity, biodegradability, etc. The research work presented in this paper focuses on an eco-friendly dyeing process of the leather using aqueous henna leaves extract that contain lawsone, 2-hydroxy 1,4 naphthaquinone, the most prominent member of alpha – hydroxynaphthaquinone, natural dye class. The aqueous extraction from the henna leaves was studied and the best extraction conditions were found to be the maceration of the ground henna leaves in water, at temperature (> 80°C) for 60 minutes in a water bath without agitation. The color of the leather had become deeper with increasing amount of henna extract and multiple colors have been obtained depending on the type of mordants used. The henna dyeing had resulted in leathers with good rub (dry and wet) and perspiration fastness characteristics, while the light fastness characteristics were found to be moderate. En ligne : https://drive.google.com/file/d/1CW56u-TUPgTxFPrHbzc3eElLF5qzkeeO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5220
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 5 (05/2009) . - p. 183-190[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 011294 - Périodique Bibliothèque principale Documentaires Disponible Glove leather manufacture from sheepskins : influence of fatliquors and syntans on the gloving properties / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 5 (05/2008)
[article]
Titre : Glove leather manufacture from sheepskins : influence of fatliquors and syntans on the gloving properties Type de document : texte imprimé Auteurs : Balaraman Madhan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; S. Sadulla, Auteur ; Swarna Vinodh Kanth, Auteur ; Rathinam Aravindhan, Auteur ; G. Balaji, Auteur Année de publication : 2008 Article en page(s) : p. 182 - 190 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The post tanning auxiliaries like syntans and fatliquors are known to significantly influence the properties of glove leathers. The right choice of fatliquors and syntans is critical to obtain the leathers with good gloving property. Hence, in the present work an attempt has been made to study systematically the influence of various fatliquors and syntans on the gloving properties of leather made from sheep skins. Combinations of six different types of fatliquors and four syntans have been studied for their influence on the gloving properties viz., run, softness, strength properties and other subjective properties like smoothness and stretch. It is observed that the combination of fatliquors based on sulfited fish oil, sulfochlorinated paraffin wax and lecithin along with glutaraldehyde and polymeric retanning agents result in leathers with better gloving characteristics. En ligne : https://drive.google.com/file/d/1SbWduKdKigMOHOQZruYLGlD_LvfszrUl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2565
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 5 (05/2008) . - p. 182 - 190[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 010088 - Périodique Bibliothèque principale Documentaires Disponible Henna extract : Can it be an alternative retanning agent ? / A. E. Musa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 6 (06/2008)
[article]
Titre : Henna extract : Can it be an alternative retanning agent ? Type de document : texte imprimé Auteurs : A. E. Musa, Auteur ; G. A. Gasmelseed, Auteur ; S. Sadulla, Auteur ; W. Madhulatha, Auteur ; Balaraman Madhan, Auteur Année de publication : 2008 Article en page(s) : p. 188 - 193 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Extract from the leaves of lawsonia inermis (henna), widely distributed in Sudan, has been evaluated for its utilization in the retanning of the leather and presented in this paper. Leaves of henna have been extracted for 1 hour with distilled water (1:10 w/v) at temperature above 80°C. The henna extract prepared has been used for the retanning of wet blue leathers. The effectiveness of henna extract in retanning of wet blue leathers has been compared with wattle retanning. The organoleptic properties of the leathers viz. softness, fullness, grain smoothness, grain tightness (break), general appearance, uniformity of dyeing of henna retanned leather have been evaluated in comparison with wattle retanned leathers. Henna retanning resulted in leathers with good grain tightness. Dyeing characteristics of henna retanned leathers have been found to be better than wattle retanned leathers. Also physical strength characteristics, shrinkage temperature and economic viability were noted. The effluent arising from this retanning system has been analyzed for its environmental impact. En ligne : https://drive.google.com/file/d/1PjhdcJB92GZqU_JJ2W2U1YWRNlL1dv2g/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2562
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 6 (06/2008) . - p. 188 - 193[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 010401 - Périodique Bibliothèque principale Documentaires Disponible High exhaust tanning systems using a novel cross-linking agent (CA) / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 3 (05-06/2006)
[article]
Titre : High exhaust tanning systems using a novel cross-linking agent (CA) Type de document : texte imprimé Auteurs : James Kanagaraj, Auteur ; S. Sadulla, Auteur ; B. Prasada Rao, Auteur Année de publication : 2006 Article en page(s) : p. 127-130 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.
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
Enzymes protéolytiquesUne enzyme protéolytique est une enzyme capable de couper une protéine en plusieurs fragments ou peptides. La trypsine, la papaïne, la pepsine, la chymotrypsine, la plasmine, la subtilisine... sont capables de couper une protéine, chaque enzyme étant spécifique de certains sites particuliers de cette protéine. C'est ainsi, par exemple, qu'une immunoglobuline G est découpée par la papaïne en un fragment Fc et deux fragments Fab, comme l'a montré Porter en 1959.
Epuisement des tanins
Rechromage
Réticulants
Tannage au chrome
Tannage organique
Tannage végétal
Température de retraitIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Lime fleshings were hydrolysed with a proteolytic enzyme and further broken down to the amino acid level (as previously described) before preparing the corresponding aldehyde, which was then used as a cross-linking agent in tanning, in the study the product is labelled as CA.
In this study, the cross-linking agent prepared above was used as an exhaust aid in chrome tanning, rechroming and vegetable tanning to give improved tannin exhaustion. Using 2% cross-linking agent in chrome tanning improved chrome exhaustion from 67 ± 1.0% to 92 ± 1.5%; similarly, in vegetable tanning, the exhaustion of wattle extract increased from 86% to 93%.
Effluent value reductions were found together with improvements in shrinkage temperature, dyeing properties and physical strength. The chrome tanned crust leather and rechromed crust leathers were softer and tighter than control leathers.Note de contenu : - EXPERIMENTAL METHODS : Use of crosslinking agent (CA ) in chrome tanning - Use of CA in rechroming - Use of CA in vegetable tanning
- ANALYCAL PROCEDURES : Stratigraphic chrome distribution - Tannin determination
- Table 1 : Effect of CA on distribution and exhaustion of chrome in tanning and rechroming (% Cr2O3)
- Table 2 : Effect of CA on distribution and exhaustion of wattle extract in vegetable tanning
- Table 3 : Residual aldehyde in leather treated with 2% CA
- Table 4 : Shrinkage temperature for chrome tanned and rechromed leather
- Table 5 : Shrinkage temperature of vegetable tanned leather - 8% wattle +CA
- Table 6 : Emission factors in various tanning experiments (Kg/tonne hide)
- Table 7 : Colour measurements for chrome tanned crust leather
- Table 8 : Colour measurements for vegetable tanned crust leather - 8% Wattle + CA
- Table 9 : Colour difference value computed for the experimental chrome tanned crust leather (chrome tanned (BCS 8%) leather as control)
- Table 10 : Colour difference value computed for the experimental vegetable tanned crust leather (control 8%wattle extract leather)
- Table 11 : Physical propertiesEn ligne : https://drive.google.com/file/d/19WAya6EFn_iy75K66e0m2z--Tf_4KZqW/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39145
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 3 (05-06/2006) . - p. 127-130[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire 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)
[article]
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 Interaction of aldehyde developed from amino acids of tannery waste in a lower - chrome tannage an eco-friendly approach / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)
PermalinkInteraction of aluminum and hydrolysable tannin polyphenols : An approach to understanging the mechanism of aluminum vegetable combination tannage / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 9 (09/2006)
PermalinkMicrobiological aspects of hide and skin preservation by chilling / Chandra Babu Narasimhan Kannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 2 (03-04/2012)
PermalinkA new approach to less-salt preservation of raw skin/hide / James Kanagaraj in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCV, N° 10 (12/2000)
PermalinkStudies on chamois leather - Tanning using plant oil / S. Hari Krishnan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 6 (11-12/2005)
PermalinkStudies on chamois tanning : An investigation using modified fish oil / S. Hari Krishnan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 2 (02/2005)
PermalinkStudies on the influence of proteolytic enzymes in leather dyeing / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 12 (12/2006)
PermalinkStudies on the stabilization of collagen using dialdehyde starch : Part I. Effect of autoclaving on dialdehyde starch / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 12 (12/2006)
PermalinkUsing a mobile chiller for hides : a green method to resolve the TDS problem / Chandra Babu Narasimhan Kannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)
Permalink