Development of phosphorylated fatliquors and their application in the manufacture of sophisticated leathers / Geetha Baskar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 4 (04/1991)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 4 (04/1991) . - p. 159-165 Titre : Development of phosphorylated fatliquors and their application in the manufacture of sophisticated leathers Type de document : texte imprimé Auteurs : Geetha Baskar, Auteur ; K. Vijayalakshmi, Auteur ; K. Parthasarathy, Auteur ; V. V. M. Rao, Auteur ; K. S. Jayaraman, Auteur ; S. Rajadurai, Auteur Année de publication : 1991 Article en page(s) : p. 159-165 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Castor-oil-based-fatliquor with its water emulsion stable to acids and salts has been developed by introducing reactive groups such as –SO3Na and –PO3Na in the fatty chain. The lubricant introduced in the pretanning and tanning operations has resulted in the production of leathers with improved softness, fullness, grain tightness and strength characteristics as compared to leathers processed using conventional fatliquors? En ligne : https://drive.google.com/file/d/1UtRDFEvhjSgYF1nM4xLDIXLjvJt-s5xb/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8548 [article]

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Hight exhaust chrome tanning using novel copolymer for eco-friendly leather processing / James Kanagaraj in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 1 (01/2008)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 1 (01/2008) . - p. 36 - 43 Titre : Hight exhaust chrome tanning using novel copolymer for eco-friendly leather processing Type de document : texte imprimé Auteurs : James Kanagaraj, Auteur ; B. S. R. Reddy, Auteur ; Geetha Baskar, Auteur ; Sanjeev Gupta, Auteur Année de publication : 2008 Article en page(s) : p. 36 - 43 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The novel nanoparticle dispersion (NPD) of a high molecular weight copolymer in aqueous medium was investigated for its application as an aid to chrome exhaustion. The copolymer chain is made up of two types of monomers, viz. an acrylic ester and an amino acid derivative. The copolymer was synthesized using microemulsion polymerization methods. The monomer from the amino acid derivative provides conditions for microemulsion polymerization reaction in aqueous medium and facilitates formation of NPD of the copolymer in water. The developed NPD exhibits narrow particle size distribution with particle size at 40nm. The NPD is a free flowing liquid with flow characteristics almost similar to water, as shown from its low relative viscosity of 1.08 at 25°C. The zeta potential of NPD at -32.9mV demonstrates anionic nature of the copolymer particle and this may be provided from amino acid derived monomer. The NPD was tested in chrome tanning as an exhaustion aid. The NPD was used in chrome tanning experiment in the pilot level scale and the exhaustion and leather properties were found. From elaborate investigations, it is demonstrated that NPD could perform as a high exhaust chrome aid to provide 94% exhaustion of chromium when used during chrome tanning operation. The effect of NPD on the physiochemical characteristics of leather is presented. En ligne : https://drive.google.com/file/d/1Jsw2q2a8-noWYzkjNDEcDa2ZG8hJdC4k/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2583 [article]

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Low molecular weight peptides from collagenous waste : Hydrodynamic and thermodynamic studies / Geetha Baskar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 142-146 Titre : Low molecular weight peptides from collagenous waste : Hydrodynamic and thermodynamic studies Type de document : texte imprimé Auteurs : Geetha Baskar, Auteur ; K. Vijayalakshmi, Auteur ; V. V. M. Rao, Auteur ; Asit Baran Mandal, Auteur Année de publication : 1987 Article en page(s) : p. 142-146 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène -- Déchets Ethanolamine L'éthanolamine, également appelée 2-aminoéthanol ou monoéthanolamine, est un composé chimique organique qui est à la fois une amine primaire (par son groupe amine) et un alcool primaire (par son groupe hydroxyle). À l'instar des autres amines, la monoéthanolamine se comporte en base faible. L'éthanolamine est un liquide toxique, inflammable, corrosif, incolore et visqueux ; son odeur est similaire à celle de l'ammoniac. Hydrodynamique Peptides Poids moléculaires Thermodynamique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A transamidification reaction was utilised to obtain low molecular weight peptides by reacting waste skin trimmings protein with monoethanolamine (MEA). In sample, equal equivalent of protein and MBA were used, whereas in sample lithe two equivalents of protein were reacted with one equivalent of MBA. The viscosity data for both samples were analysed in terms of the Einstein and Simha—Einstein equations. Hydration volume Vh,number average molecular weight M, and intrinsic viscosity [ri] of sample II is greater than that of sample I, irrespective of temperature. Hydrodynamic results suggest that the shape of the transamidified peptide particle in solution is spherical. The results also suggest that MBA is effective in breaking the hide trimmings protein structure upon transamidification where protein content is comparatively less. Thermodynamic parameters were calculated from Eyring and Gibb’s equations. The results suggest that MBA is more effective in the ordering of the water structure in sample II than that for sample I. Note de contenu : - Preparation of aminol polypeptides - Hydronamic studies - Table 1 : Hydrated specific volume Vh, intrinsic viscosity [n] and number average molecular weight Mn for transamidified peptides at various temperatures - Table 2 : Various thermodynamic activation parameters for sample I at different concentrations of peptide - Table 3 : Various thermodynamic activation parameters for sample II at different concentrations of peptide En ligne : https://drive.google.com/file/d/1MkaPtd25QKOyZYAfIRCvd-QjZ_7N1Lsv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40128 [article]

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The role of an acid-stable fatliquor in leather manufacture / K. Vijayaklakshmi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 73 (Année 1989)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 73 (Année 1989) . - p. 47-51 Titre : The role of an acid-stable fatliquor in leather manufacture Type de document : texte imprimé Auteurs : K. Vijayaklakshmi, Auteur ; Geetha Baskar, Auteur ; K. S. Jayaraman, Auteur ; V. V. M. Rao, Auteur ; S. Rajadurai, Auteur ; G. Thyagarajan, Auteur Année de publication : 1989 Article en page(s) : p. 47-51 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Acid-stable fatliquors, based on highly unsaturated oils, that can find application at different stages of leather processing have been prepared. The influence of one such fatliquor based on sardine fish oil has been studied when applied during pickling and chrome tanning in comparison with a cationic fatliquor and control procedure where in a conventional fatliquoring has been followed. The investigation has indicated that the introduction of an anionic acid-stable fatliquor during pickling and tanning results in the production of leathers with better feel and increased strength characteristics. En ligne : https://drive.google.com/file/d/1qLsoE_AmXewZmdpDE5aLLHiFm5Hx-lsk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8827 [article]

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