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Auteur Jonnalagadda Raghava Rao
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Central Leather Research Institute - Adyar - Chennai - India
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Studies on the use of Sesuvium Portulacastrum - Part II / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 1 (01/2009)
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Titre : Studies on the use of Sesuvium Portulacastrum - Part II : Preservation of skins Type de document : texte imprimé Auteurs : Swarna Vinodh Kanth, Auteur ; S. Preethi, Auteur ; B. Keerthi, Auteur ; A. Tamil Selvi, Auteur ; P. Saravanan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2009 Article en page(s) : p. 25-32 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Sesuvium portulacastrum (S. portulacastrum) a perennial halophyte has been used as a replacement for salt in the curing process of Goatskins. The quality of phyto-preserved skins has been assessed with respect to hair slip, putrefaction odor, bacterial count, moisture content, shrinkage temperature and total extractable nitrogen. Phyto-preserved skins have been processed into finished leathers and assessed for organoleptic properties and physical characteristics. The product for phyto-preservation made from S. portulacastrum has been found to be as effective as conventional salt based curing process of goat skins. The quality of the preserved skins has been found to be on par with that of salt cured skins. The quality of resultant leathers of the experiment has been found to be comparable with control. The preservation efficacy of phyto-preserve could be due to the synergistic action of its antimicrobial metabolite present in its essential oils and the salt present in the plant. En ligne : https://drive.google.com/file/d/14hda1FkeLXj0UgVSxvlq5OCMfL2Op41r/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3252
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 1 (01/2009) . - p. 25-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010993 - Périodique Bibliothèque principale Documentaires Disponible Successful use of remnant : attractive reversible grain pattern / Murali Sathish in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 1 (01/2017)
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Titre : Successful use of remnant : attractive reversible grain pattern Type de document : texte imprimé Auteurs : Murali Sathish, Auteur ; Sathya Ramalingam, Auteur ; Rathinam Aravindhan, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2017 Article en page(s) : p. 1-6 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
Microscopie électronique à balayage
Oreille
Résistance à l'abrasion
Résistance à la déchirureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : At the present time, complete utilization of bovine parts will lead to the development of exotic leathers with attractive grain patterns. In this work an attempt has been made to prepare exotic leathers from the bovine ear, which is a solid waste from the slaughterhouse. Ears are the peculiar part of bovine, where a flexible cartilage (Type II collagen) is covered by the skin matrix (Type I collagen). The process for the preparation of the leathers from bovine ears has been optimized. The physical and morphological characteristics of the leathers have been carried out. The air permeability analysis revealed that the air permeability decreased with increase in the cartilage thickness. The processed ear possessed high resistance towards stitch tear and abrasion. The attractive reversible grain pattern along with genuine leather property provides an opportunity to utilize this material as a new source of raw material for leather making. Note de contenu : - Sedulous processing of bovine ear skins
- Scanning electron microscopic analysis
- Air permeability measurement
- Stitch tear resistance and abrasion resistanceEn ligne : https://drive.google.com/file/d/1GicZ-bA3FoGm3GyFriVZyMk92633H4ZE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27560
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 1 (01/2017) . - p. 1-6[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18607 - Périodique Bibliothèque principale Documentaires Disponible Supercritical carbon dioxide based skin preservation : solving the soak liquor effluent crisis of the leather industry / Arun Gopinath in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 4 (04/2020)
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Titre : Supercritical carbon dioxide based skin preservation : solving the soak liquor effluent crisis of the leather industry Type de document : texte imprimé Auteurs : Arun Gopinath, Auteur ; Nagarajan Vedaraman, Auteur ; Balaraman Madhan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Magesh Peter, Auteur ; Ramalingam Kirubagaran, Auteur Année de publication : 2020 Article en page(s) : p. 145-150 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acétone L'acétone en chimie, (nom officiel IUPAC propanone, aussi connue sous les noms de diméthylcétone, 2-propanone, propan-2-one et béta-cétopropane), de formule chimique CH3COCH3 est le composé le plus simple de la famille des cétones. C'est un isomère du propanal.L’acétone est un liquide transparent, inflammable, d'odeur caractéristique (plutôt fruitée). Sa température de fusion est de -95,4 °C et celle d'ébullition de 56,53 °C. Elle a une densité relative de 0,819 (à 0 °C). C'est un composé très soluble dans l'eau (c'est une molécule polaire à chaîne carbonée courte), dans l'éthanol et dans l'éther. L'acétone est le dérivé le plus simple de la série des cétones aliphatiques et la présence de la double liaison carbone-oxygène lui confère l'essentiel de sa réactivité.
Caractérisation
Cuir -- Teneur en chrome trivalent
Cuirs et peaux -- Conservation
Cuirs et peaux -- Microbiologie
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux -- Séchage
Cuirs et peaux -- Teneur en eau
Dioxyde de carbone
Fluides supercritiques
Morphologie (matériaux)
Température de retraitIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Salt-based preservation of hides/skins contributes to about 50% total dissolved solids (TDS) in tannery wastewaters. In this study, raw skins have been preserved by exposing them to a continuous flow of supercritical carbon dioxide (SCCO2) in a pressurized reactor. The process was carried out in reactors of two different capacities to ensure scalability. The skins thus dried could be stored at room temperature for a period of 30 days. The SCCO2–dried skins were less conducive for microbial growth than wet-salted skins. The soak liquor of SCCO2–dehydrated skin showed a 90% reduction in chloride content and significantly lower BOD and COD levels than soak liquor from wet-salted skins. The leathers produced from SCCO2-preserved skins and wet-salted skin had no significant quality differences. As SCCO2 systems have been reported as alternatives to all other unit operations, establishing SCCO2–based preservation will complete the circle of total leather manufacture with SCCO2. Note de contenu : - EXPERIMENTAL : Curing with SCCO2 - Acetone as a cosolvent - Moisture analysis of skin - Microbial analysis - Leather processing - Leather quality analysis - Measurement of shrinkage temperature - Evaluation of chrome content - Evaluation of physical strength and organoleptic properties - Examination of surface morphology and cross section - Emission parameters
- RESULTS AND DISCUSSION : Moisture content of raw skin - SCCO2 drying of skin - 250 ml reactor - SCCO2 drying of skin - 1.5-L reactor - Microbial load on preserved skin - Chemical and physical characterization - Surface morphology and cross section view - Organoleptic properties - Emission parametersDOI : https://doi.org/10.34314/jalca.v115i4.3801 En ligne : https://drive.google.com/file/d/16t6mCLzXMFlP7NL1IkcfnyH7VNUf_hzN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34160
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 4 (04/2020) . - p. 145-150[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21743 - Périodique Bibliothèque principale Documentaires Disponible Tannic acid-phosphonium combination : A versatile chrome-free organic tanning / N. N. Fathima in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 5 (05/2006)
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Titre : Tannic acid-phosphonium combination : A versatile chrome-free organic tanning Type de document : texte imprimé Auteurs : N. N. Fathima, Auteur ; Rathinam Aravindhan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2006 Article en page(s) : p. 161-168 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : An organic combination tanning system based on tannic acid, a precursor to vegetable tannins and tetrakis (hydroxymethyl) phosphonium sulfate (THPS) as a substitute for chrome tanning has been developed. The shrinkage temperature of the leathers obtained is 88°C. The tanning system is versatile in terms of processing both upper and garment leathers. The physical strength characteristics and organoleptic properties of the leathers obtained are comparable to that of chrome tanned leather. Environmental impact assessment shows that there is reduction in total solids when compared to chrome tanning. En ligne : https://drive.google.com/file/d/1v82nWni65vFi65DJoGNZdJVFB21E5g6o/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4010
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CI, N° 5 (05/2006) . - p. 161-168[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 004807 - Périodique Bibliothèque principale Documentaires Disponible Tanning agent based on mixed metal complexes of aluminium and zinc / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 9 (09/2001)
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Titre : Tanning agent based on mixed metal complexes of aluminium and zinc Type de document : texte imprimé Auteurs : Balaraman Madhan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2001 Article en page(s) : p. 343-349 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Environmental awareness throughout the world has forced researchers to look for an alternative-tanning agent for chromium. The alternative-tanning agent should produce white leathers with properties comparable to that of chrome tanned leather. A tanning agent based on mixed complexes of Aluminium(III) and Zinc(II) was prepared using different combination of ligands such as sodium citrate, triethylenetetramine, phthalic acid and sodium tartrate. The salt thus prepared was used for tanning studies. This chrome free tanning agent produces white leather with a shrinkage temperature above 90°C. The strength characteristics as well as the organoleptic properties of these leathers were comparable to that of conventional chromium and aluminium tanned leathers. En ligne : https://drive.google.com/file/d/1A_D0_ZwSHx29wVPigAc9f5_I61Rd7PXV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4365
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 9 (09/2001) . - p. 343-349[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001566 - Périodique Bibliothèque principale Documentaires Disponible Tanning studies with basic chromium sulfate prepared using chrome shavings as a reductant : A call for 'wealth from waste' approach to the tanning industry / Jonnalagadda Raghava Rao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 4 (04/2004)
PermalinkThe development of an integrated rechroming-neutralization-post tanning proces manufacture of upper leathers from goatskins / T. Ayyasamy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 2 (03-04/2005)
PermalinkThe three pot solution for chromium, tannins and solid waste : Recovery and reuse technique for spent semi-chrome liquor and chrome shavings / Subramanian Saravanabhavan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 5 (09-10/2004)
PermalinkThermal sensitive agents for making stimuli responsive leathers / Jaya Prakash Alla in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 12 (12/2020)
PermalinkThermochromism for smart leathers / Vairaperumal Tamilmani in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 6 (06/2015)
PermalinkTone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing / Sathya Ramalingam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
PermalinkTowards sustainable leather production vegetable tanning in non-aqueous medium / Narayana Reddy Gari in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 4 (04/2015)
PermalinkUnderlying principles in chrome tanning : Part 1. Conceptual design of pickle-less tanning / Wondu Legesse in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 12 (12/2002)
PermalinkUnderlying principles in chrome tanning : Part 2. Underpinning mechanism in pickle-less tanning / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 2 (02/2004)
PermalinkUse of ternary solvent (water - ethanol - ethyl acetate) medium for leather processing : a possible paradigm change / Bhargavi Narayana Reddy Gari in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 7 (07/2016)
PermalinkUtilization of calcium alginate beads as adsorbent for removal of dyes from tannery wastewaters / Rathinam Aravindhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 6 (06/2006)
PermalinkValue added leather auxiliaries from paper and pulp industry waste / Mohan Vedhanayagam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 9 (09/2015)
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