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Machine vision inspection system for detection of leather surface defects / Malathy Jawahar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 1 (01/2019)
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Titre : Machine vision inspection system for detection of leather surface defects Type de document : texte imprimé Auteurs : Malathy Jawahar, Auteur ; K. Vani, Auteur ; Chandra Babu Narasimhan Kannan, Auteur Année de publication : 2019 Article en page(s) : p. 10-19 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse d'image L'analyse d'image est la reconnaissance des éléments contenus dans l'image. Il ne faut pas confondre analyse (décomposition en éléments) et traitement (action sur les composantes) de l'image.
Cuir
Cuirs et peaux -- Défauts -- Classification
Cuirs et peaux -- Texture
Détection de défauts (Ingénierie)
Imagerie (technique)
Qualité -- Contrôle
Réseaux neuronaux (informatique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather quality inspection is very important in assessing the effective cutting value that can be obtained from the leather. Current practice involves an expert to inspect each piece of leather individually and detect defects manually. However, such a manual inspection is highly subjective and varies quite considerably from one assessor to another. Often this subjectivity leads to dispute between the buyer and the seller of the leathers and hence attempts are made to automate this. Automatic leather defect classification is a challenging research problem due to the difficulties that arise when segmenting defects from the leather background and determining the characteristics that describe the defects objectively. The present study describes application of machine vision system to capture leather surface images and the novel multi-level thresholding algorithm to segment defective and non-defective regions of leather followed by texture feature extraction to objectively quantify the leather surface defects. A dataset consisting of 90 leather images comprising 20 good leather and 50 defective samples has been used in the study. Experimental results on the leather defect image library database achieved an accuracy of 90% using neural network as classifier, confirming potential of using the proposed system for automatic leather defect classification. Note de contenu : - Materials
- Image acquisition system
- Image analysis
- Image segmentation
- Feature extraction using texture analysis
- Defect classification using artificial neural networkEn ligne : https://drive.google.com/file/d/19bCDm5My0DozDCYyRxrzlQuQkzRwxUhI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31549
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Code-barres Cote Support Localisation Section Disponibilité 20508 - Périodique Bibliothèque principale Documentaires Disponible Microbial degradation of horn mean with bacillus subtilis and its application in leather processing : a two fold approach / S. Balaji in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 3 (03/2008)
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Titre : Microbial degradation of horn mean with bacillus subtilis and its application in leather processing : a two fold approach Type de document : texte imprimé Auteurs : S. Balaji, Auteur ; M. Senthil Kumar, Auteur ; Chandra Babu Narasimhan Kannan, Auteur ; Praveen Kumar Sehgal, Auteur Année de publication : 2008 Article en page(s) : p. 89-93 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Horn meal hydrolysate, obtained by high steam pressure treatment of raw horns and hoofs of cattle and buffalo, yields a mixture of water soluble peptides by microbial degradation using native strain of bacillus subtilis. It is designated as bacterial degraded horn meal hydrolysate (BDHH). BDHH sotres well and does not putrefy when left at ambient conditions of temperature (31 +-3°) and relative humidity (40-80% RH). This material is employed with great success in leather tanning process to improve the exhaustion of chrome and to fill the void within the tanned collagen fibers during retanning operation. Use of BDHH in leather processing could cut down consumption of chromium salts in chrome tanning by considerably reducing the discharge of chromium in the waste liquor from 30-35% to less than 10%, thus saving cost on chromium salts and reducing the pollution load in commercial tanning operations. Filling of tanned leather with BDHH in retanning operation upgrades the crust leather. En ligne : https://drive.google.com/file/d/1s2r3Bkx00sWM3DJGeVdF7jTg91IyGX7W/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2576
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Code-barres Cote Support Localisation Section Disponibilité 009925 - Périodique Bibliothèque principale Documentaires Disponible Microbiological 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)
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Titre : Microbiological aspects of hide and skin preservation by chilling Type de document : texte imprimé Auteurs : Chandra Babu Narasimhan Kannan, Auteur ; B. Swarna Kumari, Auteur ; S. H. Vimalarani, Auteur ; C. Shanthi, Auteur ; S. Karuthapandian, Auteur ; S. Sadulla, Auteur Année de publication : 2012 Article en page(s) : p. 71-76 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens
Concentration minimale inhibitrice (antimicrobiens)En microbiologie, la concentration minimale inhibitrice (CMI) est la plus faible concentration d'un produit chimique, généralement un médicament, qui empêche la croissance visible d'une ou de plusieurs bactéries. La CMI dépend du micro-organisme considéré, de l'être humain affecté (in vivo uniquement) et de l'antibiotique lui-même.
La CMI est déterminée en préparant des solutions du produit chimique in vitro à diverses concentrations croissantes, en incubant les solutions avec des groupes séparés de bactéries en culture et en mesurant les résultats en utilisant une méthode de dilution standardisée (agar ou microdilution). Les résultats se classent ensuite comme "sensible", "intermédiaire" ou "résistant" à un antimicrobien particulier en utilisant un point d'arrêt. Les points d'arrêt sont des valeurs convenues, publiées dans les directives d'un organisme de référence, comme le US Clinical and Laboratory Standards Institute (CLSI), la British Society for Antimicrobial Chemotherapy (BSAC) ou le Comité européen sur les tests de sensibilité aux antimicrobiens (EUCAST). On a pu constater des écarts importants au niveau des points d'arrêt de divers pays européens au fil des ans, et entre ceux de l'EUCAST et du CLSI.
Alors que la CMI est la concentration la plus faible d'un agent antibactérien nécessaire pour inhiber la croissance visible, la concentration bactéricide minimale (CBM) est la concentration minimale d'un agent antibactérien qui entraîne la mort bactérienne. Plus la CMI est proche de la CBM, plus le composé est bactéricide.
La première étape de la découverte d'un médicament est souvent le dépistage d'un médicament candidat de banque de données pour les CMI contre les bactéries d'intérêt. En tant que tels, les CMI sont généralement le point de départ pour de plus grandes évaluations précliniques de nouveaux agents antimicrobiens. Le but de la mesure de la concentration minimale inhibitrice est de s'assurer que les antibiotiques sont choisis efficacement pour augmenter le succès du traitement. (Wikipedia)
Cuirs et peaux -- Conservation
Cuirs et peaux -- MicrobiologieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Though chilling has been adopted as a short term preservation method for hides and skins in many western countries, no systematic attempt has been made to study the microbiological aspects related to the method. Hence, an attempt has been made in the present investigation to study the cold activity of the major skin-borne bacteria at different temperatures and their collagenolytic activity. Among the 5 bacterial isolates studied in this investigation, Macrococcus caseolyticus was found to be the most cold tolerant bacterium exhibiting growth even at 2°C. Another bacterium, bacillus sphaericus exhibited tolerance at 4°C. These two bacteria need to be controlled while designing a chilling method for the preservation of hides and skins. The inference from the collagenolytic activity study is that there is no relationship between collagenolytic activity at 37°C and the cold activity : as bacillus firmus which exhibited the maximum activity at that temperature was found to be most cold-sensitive bacterium. The other important inference from the study is that it is necessary to use a biocide in combination with chilling at 4°C if the storage duration has to be extended beyond 9 days. The two biocides investigate in the study were found to inhibith the growth of all 5 bacterial isolates for 3 weeks and the minimum inhibitory concentrations for both were determined. Note de contenu : - Putrefying microorganisms - A brief review
- Scope of the present study
- MATERIALS AND METHODS : Materials (microorganisms - The culture media and other chemical)
- METHODS : Study of the growth profile of the microorganisms at low temperatures - Collagenolytic activity of the bacterial isolates at low temperatures (by gelatin liquefaction - By hydroxyproline assay) - Determination of collagenolytic activity of bacterial isolates - Inhibition of microorganisms at low temperature using biocides
- RESULTS AND DISCUSSION : Growth profile of skin bacterial isolates at different temperatures - Collagenolytic activity of the bacterial isolates - Cold temperature inhibition of skin bacterial isolates using biocidesEn ligne : https://drive.google.com/file/d/1f-WrN1ugOL95qUNWEZf69X04n2v514Qc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14572
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Code-barres Cote Support Localisation Section Disponibilité 13844 - Périodique Bibliothèque principale Documentaires Disponible Modeling a strategic raw hides & skins supply chain network suitable for adoption of chilling method of preservation in decentralized collection system / P. Anantha Narayanan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 10 (10/2014)
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Titre : Modeling a strategic raw hides & skins supply chain network suitable for adoption of chilling method of preservation in decentralized collection system Type de document : texte imprimé Auteurs : P. Anantha Narayanan, Auteur ; P. S. S. Prasad, Auteur ; D. Chandramouli, Auteur ; Chandra Babu Narasimhan Kannan, Auteur Année de publication : 2014 Article en page(s) : p. 353-362 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chaine logistique
Cuirs et peaux -- Conservation
Entreposage frigorifiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Salt Curing is a method that is widely used for the preservation of raw hides and skins worldwide and this leads to high salinity in tannery effluents. The treatment of such highly saline stream poses serious challenges, as pollution control norms for salinity are quite stringent in many countries including India. Chilling has been proven a most efficient method both in terms of cost and preservation efficacy for short-term storage but adoption in decentralized raw material collection systems prevailing in many developing and underdeveloped countries is a major challenge. In the present techno-management study, an attempt has been made to model a strategic supply chain network for collection and chilling of raw hides and skins suitable for such decentralized situations. Tamil Nadu state in India has been chosen for the pilot project as it contributes close to 50% of the tanning activity in India. Eight clusters have been formed by grouping the districts of Tamil Nadu based on the geographical location. The optimized location for the chiller in each cluster was found using gravity location model and the feasibility of transporting the raw hides and skins from slaughterhouse to chiller has been studied. Note de contenu : - Preservation by chilling - International experience
- Chilling method of preservation - an Indian experience
- The raw material collection system in India
- Modeling a suitable strategic supply chain network for decentralized collection system
- Optimizing the location of chillers with respect to slaughter houses/markets in Tamil Nadu
- Data collection and clustering
- Location of the chiller
- Benefits of the proposed model
- Recommendations for adoptionEn ligne : https://drive.google.com/file/d/13BUAZUGRIxv--PDkZPqCc9fdR72bfvy0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22084
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Code-barres Cote Support Localisation Section Disponibilité 16559 - Périodique Bibliothèque principale Documentaires Disponible A 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)
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Titre : A new approach to less-salt preservation of raw skin/hide Type de document : texte imprimé Auteurs : James Kanagaraj, Auteur ; Chandra Babu Narasimhan Kannan, Auteur ; S. Sadulla, Auteur ; G. Suseela Rajkumar, Auteur ; V. Visalakshi, Auteur ; N. Chandrakumar, Auteur Année de publication : 2000 Article en page(s) : p. 368-374 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Salt curing systems, despite their cost and ease advantages, suffer heavily on environmental counts. The ill effects of the system need no emphasis. The deteriorating effect of electrolytes discharged by the use of salt by the tanning industry on the quality of soil and ground water is realised now more than ever before. The electrolytes, in the form of chloride and sulphate, form the largest component of most tannery effluents and they are the most difficult to treat at the end of the pipe. The source of the electrolytes is mainly from salt curing methods currently followed. The objective of this paper is to propose a suitable technology for the preservation of raw skin/hide that is an alternative to the salt curing method so as to combat the pollution problem arising out of salt. The present work is aimed at developing a less-salt curing method. The entire work is based on the fact that salt curing depends on dehydration of the stock to less than 30% water content in addition to exploiting the bacteriostatic properties of salt. In the present investigation, the preservation effect is achieved by using a combination of silica gel - environmental friendlier and easy-to-treat powerful dehydrating agent and 5% salt with or without 0.1% of p-chloro meta cresol (PCMC). The efficacy of the method was assessed by various parameters and tools such as moisture content, total extractable nitrogen, bacterial count and pollution load generated in leather processing. The results indicate that the method was as efficient as conventional salt curing and did not pose any problem in soaking or in the leather manufacturing process. The quality of the leather obtained was on a par with that obtained from conventionally salt cured stock. Thus the method appears to be viable in combating the problems of chloride and Total Dissolved Solids (TDS) and may be an effective alternative to conventional salt curing . En ligne : https://drive.google.com/file/d/1sQj1QjAuDd6fG82BabL5cITpJm3FO468/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4404
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Code-barres Cote Support Localisation Section Disponibilité 006981 - Périodique Bibliothèque principale Documentaires Disponible A new depigmentation and fiber opening method for the conversion of stingray skins into leathers / R. Karthikeyan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 1 (01/2011)
PermalinkNovel approach towards high exhaust chromium tanning - Part I : role of enzymes in the tanning process / R. Venba in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 12 (12/2008)
PermalinkRecovery and characterization of protein hydrolysate from chrome shavings by microbial degradation / C. Shanthi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 6 (06/2013)
PermalinkSoft leathers from himantura stingray skins / R. Karthikeyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 3 (05-06/2009)
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 solubilized sulfur dyes for coloring leather / R. Venba in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 6 (06/2015)
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)
PermalinkStudy on compatibility of acid dyes : assessment using a computer colour matching system / Chandra Babu Narasimhan Kannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 3 (05-06/1997)
PermalinkA systematic study on the role of chilling temperatures on the curing efficacy of hides and skins / Chandra Babu Narasimhan Kannan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 11 (11/2012)
PermalinkThe renaissance of Fe(III) as self-tanning agent / R. Karthikeyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 4 (07-08/2011)
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)
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