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Auteur Jonnalagadda Raghava Rao
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Central Leather Research Institute - Adyar - Chennai - India
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Reuse of solid waste from juice industry (citrus sinensis peel) in the extraction of antioxidants with enhanced activity through polymer encapsulates for the preservation of skin / Marimuthu Pradeep Kumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 7 (07/2014)
[article]
Titre : Reuse of solid waste from juice industry (citrus sinensis peel) in the extraction of antioxidants with enhanced activity through polymer encapsulates for the preservation of skin Type de document : texte imprimé Auteurs : Marimuthu Pradeep Kumar, Auteur ; Punitha Velmurugan, Auteur ; Kalarical Janardhanan Sreeram, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2014 Article en page(s) : p. 231-238 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alginate de sodium L'alginate de sodium ou polymannuronate sodique, de formule NaC6H7O6 est un additif alimentaire (E401) utilisé dans les boissons, constitué d’alginate et de sodium. Il se présente sous forme de poudre blanche à blanc crème, inodore et sans saveur, très soluble dans l'eau. C'est une longue molécule extraite d'algues brunes, constituée d'unités de glucides reliées ensemble pour former une chaîne.
Antioxydants
Biomolécules actives
Cuirs et peaux -- Conservation
Cuirs et peaux de chèvres
Déchets végétaux -- Recyclage
Encapsulation
Inhibiteurs (chimie)
Polyéthylène glycolIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Bio resources are finding increasing applications in our day-to-day activities. Current research on the active ingredients of plant/fruit extracts has several applications. To widen their applications in various fields, suitable biocompatible carriers are needed which would increase the shelf life of the extracts. In this work, one such biocompatible carrier for encapsulation has been developed using PEG-Sodium alginate as a complex which will act as a model for any natural product extract viz., Citrus sinensis peel. The extract has been studied for its radical and nitrite scavenging activity, inhibition of ?-carotene bleaching and lipid peroxidation assay, before and after encapsulation in order to quantify the antioxidant activity in presence of the carrier. From the experimental results, better encapsulation of the antioxidant have been observed with increasing molecular weight of PEG, up to 8000 Da which led to an increased shelf life and sustained release. Antioxidant-PEG-8000-SA, 20:2:1 (APS-8000) mixture has been optimized and used for preservation of goatskin. The dehydration, rehydration and hydroxyproline assays reveal that, APS-8000 would be better alternative for the conventional sodium chloride preservation. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of lyophilized powder - Reduced viscosity measurement studies - Color measurement - 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity - Inhibition of -carotene bleaching En ligne : https://drive.google.com/file/d/17Ft9J0k06X8bV8EAfVid0SdylYX58n7J/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21708
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Code-barres Cote Support Localisation Section Disponibilité 16423 - Périodique Bibliothèque principale Documentaires Disponible Role of phenolics in the stabilization of collagen / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 4 (04/2004)
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Titre : Role of phenolics in the stabilization of collagen Type de document : texte imprimé Auteurs : Balaraman Madhan, Auteur ; T. Ramasami, Auteur ; V. Subramanian, Auteur ; Balachandran Unni Nair, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2004 Article en page(s) : p. 157-163 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Stabilization of the fibrous protein collagen is important in biological and industrial processes. In the present study, three representative phenolic compounds - catechol, resorcinol and pyrogallol have been selected to probe their role in the stabilization of collagen. Hydrothermal stability and the stability against enzyme (collagenase) have been considered as the measures for the stabilization process. It has been found that catechol increased the hydrothermal stability of the collagen fibres by 6.5 °C and also the catechol treated collagen fibres exhibited higher resistance against the degradation by enzyme collagenase. Resorcinol treated collagen fibres exhibited least resistance both against heat and collagenase. Pyrogallol increased the shrinkage temperature of the collagen fibres by 4.5 °C and resisted the activity of collagenase to a considerable extent. Molecular modeling studies have provided clear evidence for the significance of electrostatic and hydrogen bonded interaction in the stabilization of collagen by phenolic compounds. En ligne : https://drive.google.com/file/d/1I7oW6yeliem0gIk3ZWh0q9dOZZYYYwuw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4189
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Code-barres Cote Support Localisation Section Disponibilité 001600 - Périodique Bibliothèque principale Documentaires Disponible 001601 - Périodique Bibliothèque principale Documentaires Disponible Salt-free chromium tanning : Practical approaches / Murali Sathish in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 1 (01/2022)
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Titre : Salt-free chromium tanning : Practical approaches Type de document : texte imprimé Auteurs : Murali Sathish, Auteur ; Rathinam Aravindhan, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2022 Article en page(s) : p. 3-9 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
DéchaulageOpération consistant à débarrasser les peaux de la chaux et des substances alcalines qui leur ont été appliquées au pelanage.
Eaux usées -- Analyse
Tannage au chrome
Tannage sans selsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chromium tanning finds a prominant place in leather manufacturing for permanent stabilization of hide/skin matrix. Though, it has multiple advantages in terms of high thermal stability, easy process and low cost etc., the current practice is not environmentally sustainable. Poor chromium exhaustion and TDS load generation are the major environmental threats of conventional chromium tanning systems. On the other hand, salt-free chromium tanning is identified as one of the efficient alternative approaches for hide/skin matrix stabilization. However, it has not been commercially practiced due to the several practical difficulties. In this work attempts have been made to develop a practically viable high-performance salt-free chromium tanning system using deliming liquor as tanning float and changing the order of addition of masking salt. The developed methodologies completely avoid the use of salt/basification process and it is suitable for all kinds of raw materials and tannery houses. Besides, the process enjoys 71-77% reduction in TDS load and the uptake of chromium is around 90%. The physical strength characteristics are on par with conventional process and the leathers exhibit good grain tightness and roundness. The developed methodologies are simple and do not require any specialty chemicals. Note de contenu : - MATERIALS AND METHOD : Practical approaches for salt-free chromium tanning - Analysis of wet-ble leathers - Analysis of physical strength characteristics and organoleptic properties - Analysis of wastewater
- RESULTS AND DISCUSSION : Approach-1 : Salt-free chrome tanning in deliming liquor (CTDL) - Approach-2 : Changing the order of addition of masking salts (COAMS) - Microscopic analysis - Physical strength characteristics and organoleptic properties - Analysis of wastewater
- Table 1 : State-of-the-art technologies for improved chrome tanning system
- Table 2 : Process recipe for salt-free chromium tanning in deliming liquor (CTDL)
- Table 3 : Process recipe for salt-free chromium tanning: changing the orner of addition of masking salts (COAMS)
- Table 4 : Process recipe for conventional pickle-based chrome tanning
- Table 5 : Characteristics of wastewater (Deliming to Tanning)DOI : https://doi.org/10.34314/jalca.v117i1.4690 En ligne : https://drive.google.com/file/d/1aI4xzqRNBLiq2uTszet6Vj-1H1yXO16p/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37025
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Code-barres Cote Support Localisation Section Disponibilité 23238 - Périodique Bibliothèque principale Documentaires Disponible A semi-empirical quantum mechanical modeling study on the interaction of collagen-like peptides with polyphenolic molecules : An attempt to gain insights into vegetable tanning / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 7 (07/2003)
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Titre : A semi-empirical quantum mechanical modeling study on the interaction of collagen-like peptides with polyphenolic molecules : An attempt to gain insights into vegetable tanning Type de document : texte imprimé Auteurs : Balaraman Madhan, Auteur ; V. Subramanian, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur ; T. Ramasami, Auteur Année de publication : 2003 Article en page(s) : p. 273-278 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A semi-empirical quantum mechanical PM3 hamiltonian based molecular modeling has been used to study the interactions of collagen-like peptide with polyphenolics. A collagen-like peptide 9-mer sequence has been built and interacted with the polyphenolic molecules. Most of the complexes of the peptide sequence and polyphenolic molecule exhibited hydrogen bonding. The binding energies of the complexes were in the range of 6.5 - 20 kcal/mol. Complexes of gallic acid exhibited the least binding energies. Epicatechin complexes exhibited higher binding energies with the collagen-like peptide sequence. En ligne : https://drive.google.com/file/d/1NKAhmRIfS0pZFdyQWs5Cphz-oIlJQsoI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4145
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Code-barres Cote Support Localisation Section Disponibilité 001589 - Périodique Bibliothèque principale Documentaires Disponible Single step hair removal and fiber opening process : Simultaneous and successive addition of protease and a-amyiase / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 11 (11/2006)
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Titre : Single step hair removal and fiber opening process : Simultaneous and successive addition of protease and a-amyiase Type de document : texte imprimé Auteurs : Palanisamy Thanikaivelan, Auteur ; B. Chandrasekaran, Auteur ; C. K. Bharath, Auteur ; Subramani Saravanabhavan, Auteur ; C. Anandhi, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2006 Article en page(s) : p. 388-398 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The use of enzyme based products for many areas in leather making has found its way into commercial practice. Proteolysis and a-amylase enzymes have found use in hair removal and fiber opening, producing comparable results to the conventional practice of lime and sulfide based dehairing and fiber opening. However, this process is a two step sequence in which dehairing is performed by the proteolysis enzyme followed by fiber opening through a-amylase. This study aims at transforming the two-step method into a single-step process, while maintaining environmental sustainability. Experiments were carried out using various percentages of dehairing enzyme and a-amylase following successive, simultaneous addition. The order of addition of the enzymes is also varied. Standardization experiments at bulk level were carried out to obtain best results. The leathers obtained from simultaneous addition of enzymes (1 % protease and 0.75 % a-amylase) were comparable to that of the conventionally produced leathers in terms of physical properties and appearance. The input-output analysis shows complete dehairing and fiber opening, which is also confirmed through scanning electron micrographs. There is reasonable reduction in water consumption, wastewater discharge, COD and TS loads when compared to the conventional leather processing. En ligne : https://drive.google.com/file/d/1jP8zEP1uDaan8sy04ImHihO5DjlTXhUI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3969
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Code-barres Cote Support Localisation Section Disponibilité 005798 - Périodique Bibliothèque principale Documentaires Disponible Solving vein marks defects problem through wet end process / K. Gowthaman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 9 (09/2014)
PermalinkStepping into third millennium : Third generation leather processing : A three step tanning technique / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 5 (05/2003)
PermalinkStimuli responsive leathers using smart retanning agents / Sangeetha Subramanian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 6 (06/2012)
PermalinkStudies of ethiopian sheepskins as an opportunity for value addition, part II : optimization and characterization of wanke upper and garment leather / H. Mohammed in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 5 (05/2014)
PermalinkStudies on combination tanning based on henna and oxazolidine / A. E. Musa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 10 (10/2009)
PermalinkStudies on ethiopian sheep skins as an opportunity for value addition part I : histological, microscopic and chemical characterization of abyssinian and wanke sheepskins / H. Mohammed in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 3 (03/2014)
PermalinkStudies on phosphonium based combination tanning : less chrome approach / N. N. Fathima in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 9 (09/2011)
PermalinkStudies on selective defect identification of crust leathers for computer-aided grading / S. Nithiyanantha Vasagam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 6 (06/2013)
PermalinkStudies on tanning with zirconium oxychloride : Part I. Standardization of tanning process / A. Sundarrajan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 3 (03/2003)
PermalinkStudies on tanning with zirconium oxychloride : Part II. Development of a versatile tanning system / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 3 (03/2003)
PermalinkStudies on tara-phosphonium combination tannage : approach towards a metal free eco-benign tanning system / Rathinam Aravindhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 3 (03/2015)
PermalinkStudies on the development of leathers from formaldehyde-free melamine syntan / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 5 (05/2012)
PermalinkStudies on the development of a multi-functional syntan / R. Nataraj in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 7 (07/2009)
PermalinkStudies on the development of pickle-sess vegetable tanning / Subramani Saravanabhavan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 7 (07/2004)
PermalinkStudies on the henna-glutaraldehyde combination tanning system / A. E. Musa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 3 (03/2011)
PermalinkStudies on the physico-chemical behavior of synthetic tanning agents in non-aqueous medium / Gladstone Christopher Jayakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 8 (08/2017)
PermalinkStudies on the removal of inter-fibrillary materials part I : Removal of protein, proteoglycan, glycosoaminoglycans from conventional beamhouse process / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 5 (05/2010)
PermalinkStudies on the removal of inter-fibrillary materials. Part II : removal of protein, proteoglycan and glycosoaminoglycans from biobased pre-tanning process / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 6 (06/2010)
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)
PermalinkStudies on the use of bi-functional enzyme for leather making / Gladstone Christopher Jayakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 12 (12/2016)
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