Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Preparation and characterization of collagen grafted by styrene-butyl acrylate and its application for paper sizing / Sufeng Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 12 (12/2014)
[article]
Titre : Preparation and characterization of collagen grafted by styrene-butyl acrylate and its application for paper sizing Type de document : texte imprimé Auteurs : Sufeng Zhang, Auteur ; Qun Wang, Auteur ; Wanwan Dou, Auteur ; Wang Xuechuan, Auteur ; Qiang Taotao, Auteur Année de publication : 2014 Article en page(s) : p. 404-410 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Collagène
Copolymère styrène acrylate de butyle
Déchets industriels -- Recyclage
Encollage
Greffage (chimie)
Papier
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen extracted from tannery wastes was modified by grafting it with molecular chains formed by polymerizing vinyl and acrylate monomers. The novel collagen product obtained in this manner was tested as paper sizing agent. The structure and properties of modified collagen were characterized by FTIR, STA and XRD. Results indicate that polyvinyl chains were grafted onto collagen, primarily in its crystalline regions. This modification significantly improved the thermal stability of collagen. Then the modified collagen emulsion alone (MCE), or combined either with gelatinized starch (MCE+S) or commercially produced styrene-acrylic emulsion (MCE+SAE), was applied to the surface of corrugating medium. The properties of these products were compared with those of commercially produced medium sized by SAE+S. Sizing by (MCE+S) increased the ring crush index by 12.7% and tensile index by 13.4%. In a Cobb60 test the corrugating medium sized by a blend of modified collagen and styrene acrylic emulsion (MCE+SAE) absorbed less water than commercially produced medium sized by SAE+S. Note de contenu : - Characterization of modified collagen sizing agent
- The sizing properties of modified collagen
En ligne : https://drive.google.com/file/d/1RiMCTbSZlYWnuBvVJIxJWfzJBMaXdwuo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22497
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 12 (12/2014) . - p. 404-410[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 16713 - Périodique Bibliothèque principale Documentaires Disponible Pressure wet hydrogen peroxide oxidation of chromium sludge / S. Pinho in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 6 (11-12/2002)
[article]
Titre : Pressure wet hydrogen peroxide oxidation of chromium sludge Type de document : texte imprimé Auteurs : S. Pinho, Auteur ; M. F. Almeida, Auteur ; M. J. Ferreira, Auteur Année de publication : 2002 Article en page(s) : p. 257-262 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Boues résiduaires
Déchets -- Elimination
Essais (technologie)
Oxydation humide
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.
Sédimentation
Taguchi, Méthodes de (Contrôle de qualité)
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : European tanneries generate a large amount of sludge containing chromium and other substances, some of which may be hazardous in post-tanning operations. In the next few years it is expected that landfilling these high organic content residues will be restricted in the EU thus imposing the need for treatment. This work assesses wet oxidation (WO) using hydrogen peroxide as an alternative solution for reducing the volume of sludge and its organic content. The effects of temperature, time, H2O2 dose and pH in the WO of a tannery sludge with chromium are evaluated through laboratory tests carried out in the range of 100-250 oC. Volume of sludge, total solids and volatile solids were determined in the experiments as well as total organic carbon and chromium on most of them. Note de contenu : - EXPERIMENTAL DETAILS : Sludge characteristics - Sedimentation tests - WO experiments - WO blank test - Design of experiments
- RESULTS AND DISCUSSION : Characteristics of chromium sludge - Sedimentation tests with chromium sludge - WO blank test - WO experiments - First set of WO experiments - Second and third sets of WO experiments - Selection of temperature, time and H2O2 offer
- Table 1 : Results of WO experiments following a 7 factors, 2 levels L8 Taguchi design
- Table 2 : Effects of the 7 factors on the performance of WO experiments
- Table 3 : Results of the 2nd set of WO experiments following a L4 Taguchi design with temperature, time, pH at the levels of 200/250 oC, 30/120, minutes, pH 1/4
- Table 4 : Effects of the 3 factors on the performance of WO experiments on Table III
- Table 5 : Results of the 3rd set of WO experiments following a L4 Taguchi design with temperature, time, pH at the levels of 200/240 oC, 30/120 minutes, pH 2/3
- Table 6 : Effects of the 3 factors on the performance of WO experiments on Table V
- Table 7 : Wet oxidation results of a pulp with 2% sludge, initial pH 4, for 15 and 240 minutes at 200oC with different doses of hydrogen peroxideEn ligne : https://drive.google.com/file/d/1Lt-W61c8zvLIKmiIYotE7bUGzFDiOkfM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39846
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 6 (11-12/2002) . - p. 257-262[article]Purification of proetin hydrolyzate recovered from chrome tanned leather shaving waste / Rubina Chaudhary in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 1 (01/2016)
[article]
Titre : Purification of proetin hydrolyzate recovered from chrome tanned leather shaving waste Type de document : texte imprimé Auteurs : Rubina Chaudhary, Auteur ; Anupama Pati, Auteur Année de publication : 2016 Article en page(s) : p. 10-16 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Déchets industriels -- Recyclage
Hydrolysats de protéines
Précipitation (chimie)
Produits chimiques -- Purification
Tannage -- DéchetsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Environmental constraints have become key issue for sustenance of industries worldwide. Waste management approach insists tanners look for an innovative way of creating wealth from waste. Chrome tanned leather shavings (CTLS) are generated in leather making process and requires a major attention on disposal. There are developed processes for recovery of protein and chromium from CTLS through acid/ alkaline/enzymatic hydrolysis process. However, the derived protein hydrolyzate contains impurities such as chromium and neutral salts. In this study, an attempt has been made to purify protein hydrolyzate through protein precipitation process. Protein purification studies have been carried out to study the influence of factors such as salt concentrations, pH and time. The purity of protein hydrolyzate before and after purification process is found to be 95 and 99.4% respectively. This is further evidenced from amino acid analysis of protein hydrolyzate before and after purification. The recovered protein hydrolyzate could be used in a wide range of products such as fertilizer, animal feed and bio-composites. Note de contenu : - EXPERIMENTAL : Materials - Extraction of protein hydrolyzate from chrome shavings through biochemical process - Purification of protein hydrolyzate derived from biochemical process : optimization of nature of salt, concentrations of salt and protein hydrolyzate, time and pH - Pilot trials - Characterization of protein hydrolyzate before and after purification
- RESULTS AND DISCUSSION : Underlying principles of protein precipitation through saltin out - Effect of nature of salts - Optimization of salt concentration for protein precipitation - Optimization of concentration of proteinous substance - Optimization of time for protein precipitation - Effect of pH on protein precipitation - Pilot trialsEn ligne : https://drive.google.com/file/d/1yCvBSSC1qlQKNwKw0vWkxpoeIgGrRR7d/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25273
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 1 (01/2016) . - p. 10-16[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17767 - Périodique Bibliothèque principale Documentaires Disponible Recovery of collagen hydrolysate from chrome leather shaving tannery waste through two-step hydrolysis using magnesium oxide and bating enzyme / Alvin Asava Sasia in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 2 (03-04/2019)
[article]
Titre : Recovery of collagen hydrolysate from chrome leather shaving tannery waste through two-step hydrolysis using magnesium oxide and bating enzyme Type de document : texte imprimé Auteurs : Alvin Asava Sasia, Auteur ; Paul Sang, Auteur ; Arthur Onyuka, Auteur Année de publication : 2019 Article en page(s) : p. 80-84 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie)
Collagène
EnzymesUne enzyme est une protéine dotée de propriétés catalytiques. Pratiquement toutes les biomolécules capables de catalyser des réactions chimiques dans les cellules sont des enzymes ; certaines biomolécules catalytiques sont cependant constituées d'ARN et sont donc distinctes des enzymes : ce sont les ribozymes.
Une enzyme agit en abaissant l'énergie d'activation d'une réaction chimique, ce qui accroît la vitesse de réaction. L'enzyme n'est pas modifiée au cours de la réaction. Les molécules initiales sont les substrats de l'enzyme, et les molécules formées à partir de ces substrats sont les produits de la réaction. Presque tous les processus métaboliques de la cellule ont besoin d'enzymes pour se dérouler à une vitesse suffisante pour maintenir la vie. Les enzymes catalysent plus de 5 000 réactions chimiques différentes2. L'ensemble des enzymes d'une cellule détermine les voies métaboliques qui peuvent avoir lieu dans cette cellule. L'étude des enzymes est appelée enzymologie.
Les enzymes permettent à des réactions de se produire des millions de fois plus vite qu'en leur absence. Un exemple extrême est l'orotidine-5'-phosphate décarboxylase, qui catalyse en quelques millisecondes une réaction qui prendrait, en son absence, plusieurs millions d'années3,4. Comme tous les catalyseurs, les enzymes ne sont pas modifiées au cours des réactions qu'elles catalysent, et ne modifient pas l'équilibre chimique entre substrats et produits. Les enzymes diffèrent en revanche de la plupart des autres types de catalyseurs par leur très grande spécificité. Cette spécificité découle de leur structure tridimensionnelle. De plus, l'activité d'une enzyme est modulée par diverses autres molécules : un inhibiteur enzymatique est une molécule qui ralentit l'activité d'une enzyme, tandis qu'un activateur de cette enzyme l'accélère ; de nombreux médicaments et poisons sont des inhibiteurs enzymatiques. Par ailleurs, l'activité d'une enzyme décroît rapidement en dehors de sa température et de son pH optimums.
Hydrolysats de protéines
Hydrolyse
Oxyde de magnésiumL'oxyde de magnésium, communément appelé magnésie, a pour formule MgO et se présente sous la forme de poudre blanche très fortement basique absorbant l'eau et le dioxyde de carbone présents dans l'atmosphère.
STRUCTURE : L'oxyde de magnésium est un cristal ionique. L'oxyde de magnésium a une structure comparable à celle du chlorure de sodium7. Cela se traduit par
Un réseau d'anion oxygène formant une structure de type cubique à faces centrées
Un réseau de cation magnésium occupant l'ensemble des sites octaèdriques.
L'oxyde de magnésium est un matériau modèle des cristaux ioniques car la faible électronégativité du magnésium, et la forte électronégativité de l’oxygène font que la structure de l’oxyde de magnésium peut s’expliquer quasi uniquement grâce à des interactions entre des particules ponctuelles chargées 10.
La surface de l'oxyde de magnésium la plus stable dans le vide est obtenue en réalisant une coupe selon le plan cristallographique (100). Les particules d'oxyde de magnésium produites par combustion du magnésium métallique présentent d'ailleurs une forme cubique révélatrice de la présence de ces plans. Néanmoins, en présence d'eau, la surface de l'oxyde de magnésium est couverte d'ions hydroxyles qui stabilisent les plans (111)
PRODUCTION : La majeure partie de l'oxyde de magnésium est actuellement obtenue soit à partir de carbonate de magnésium MgCO3 qui constitue certains minéraux tels que la magnésite, soit à partir de chlorure de magnésium que l'on extrait de l'eau de mer ou de saumures souterraines.
Récupération (Déchets, etc.)
Tannage -- Déchets
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome-tanned solid waste emanating from leather industry is usually disposed of to the environment through landfill which not only pollutes the environment but also wastes the protein resource contained in it. Protein recovery for re-use in secondary industrial processes presents the best strategy for its re-utilisation. Dechroming by hydrolysis is the most practiced method of protein and chromium recovery from tanned solid waste. The alkali-enzyme two step hydrolysis methods are commonly utilised for improved protein recovery efficiency. However, enzyme cost and temperature dependence of the heat stable alkali enzyme has made the process economics difficult and therefore unattractive. The objective of the present study was to explore a relatively inexpensive method of recovering collagen hydrolysate through a two-step hydrolysis incorporating conventional bating enzyme. The method of treatment involved a first-step denaturation and degradation with alkali followed by inoculation with bating enzyme. The ash content, total kjeldahl nitrogen, dry matter and chromium content of the collagen hydrolysates obtained are reported. Protein recovery at 58.20% and 50.76% efficiency were obtained for the separate alkali and enzyme hydrolysis respectively. A combined protein recovery rate of 79.45% efficiency was obtained for the two-step process. The results of this study indicate that hydrolysis dechroming employing the use of conventional bating enzyme could offer a low-cost alternative for the effective treatment and reuse of chrome-tanned shaving solid waste. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Method - Optimisation of enzyme assay parameters
- RESULTS AND DISCUSSION : Characteristics of chrome shavings - Alkaline hydrolysis of chrome shavings - Optimisation of enzyme assay parameters - Bate enzyme hydrolysis of chrome shavings - Chrome residue
- Table 1 : Chemical characteristics of chrome shavings
- Table 2 : Composition of hydrolysate from alkalinie treatment
- Table 3 : Composition of hydrolysate from bate enzyme treatment
- Table 4 : Characteristics of the chrome residue
- Fig. 1 : Effect of enzyme concentration on hydrolysis
- Fig. 2 : Effect of time on hydrolysisEn ligne : https://drive.google.com/file/d/1g-HCXiLEHH8UobcTvBfdZmzWYeoBH6oD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32304
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 2 (03-04/2019) . - p. 80-84[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20855 - Périodique Bibliothèque principale Documentaires Disponible Remediation of spent vegetable tannins from waste tanning liquor through coagulation and ultrasound pre-treatment : a sustainable approach / Resmi Mohan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 9 (09/2022)
[article]
Titre : Remediation of spent vegetable tannins from waste tanning liquor through coagulation and ultrasound pre-treatment : a sustainable approach Type de document : texte imprimé Auteurs : Resmi Mohan, Auteur ; R. Muthukumar, Auteur ; R. Shivaji Ganesan, Auteur ; S. Shrividhya, Auteur ; Venkatasubramanian Sivakumar, Auteur Année de publication : 2022 Article en page(s) : p. 367-378 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acacia et constituants
Alun
Argile
Chaux
Chlorure de baryum
Chlorure de zinc
Coagulation
Décantation
Eaux usées -- Epuration
Polyélectrolytes
Précipitation (chimie)
Tanins végétaux
Tannage -- Déchets
UltrasonsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Vegetable tanning is one of the oldest methods of tanning. Vegetable tannins present in spent tanning liquor necessitates suitable remediation measures for sustainable solution. Vegetable tanning agent, wattle extract powder and vegetable tanning process spent liquor collected from a commercial tannery were used for the experiments. In the present approach, natural clay has been employed for the coagulation of spent vegetable tannins. Various other suitable precipitating agents such as zinc chloride (ZnCl2), barium chloride (BaCl2), ferric alum, lime and poly-electrolyte have also been studied for their efficacy in the treatment process and their requirement optimized. The efficacy of coagulation was monitored through settling characteristics of precipitation process and % settled volume for a given time. In the case of wattle powder, better settling of tannins was obtained due to combined use of optimized amount of clay and ZnCl2. Whereas, ultrasound pre-treatment provided further enhancement. In the case of spent tannery vegetable tanning liquor, ultrasound pre-treatment of polyelectrolyte along with optimized amount of normal lime, clay and ferric alum provided rapid settling behavior, with steady state achieved in 20 minutes with settled volume of ~10 ml. Similar trend was also achieved (10 ml, 8 min). for ultrasound pre-treated optimized clay with the use of other agents as normal. There was a significant reduction in particle size of clay (from 539 nm to 298 nm) through ultrasound pre-treatment (20 min.), leading to more surface area facilitating the coagulation process. This method could be useful for remediation of vegetable tannins present in spent vegetable tanning liquors using available natural material clay and shall also be extended to other streams. The present study has explored the ultrasound assisted coagulation science and technology for remediation of wastewater in general, whereas, spent vegetable tanning liquor in specific. Note de contenu : - INTRODUCTION : Chemistry of vegetable tannins - Coagulation treatment for vegetable tannins use of soil clay in coagulation process : originality of the present work - Use of ultrasound in coagulation process - Effect of other coagulating agents
- MATERIALS AND METHODS : Materials used - Ultrasound equipment
- METHODS : Preparation of synthetic vegetable tanning liquor (SVT) - Settling characteristics and % settle volume - Optimization of zinc chloride, barium chloride and clay - Effect of ultrasound pre-treatment on optimized zinc chloride - Effect of combination of zinc chloride and clay - Optimization of ferric alum and clay - Optimization of poly electrolyte - Effect of ultrasound pre-treatment on clay with optimized normal ferric alum and polyelectrolyte - Effect of ultrasound pre-treatment on polyelectrolyte with optimized normal clay ferric alum - Effect of lime on ultrasound pre-treated optimized polyelectrolytes in spent tannery vegetable tanning liquor - Effect of lime on ultrasound pre-treated optiimzed clay in spent tannery vegetable tanning liquor - Particle size analysis of clay samples
- RESULTS AND DISCUSSIONS : Optimization of barium chloride and zinc chloride - Optimization of clay with optimized zinc chloride - Effect of ultrasound pre-treatment on optimized zinc chloride - Effect of combined use of zinc chloride and clay - Optimization of ferric alum - Optimization of clay with optimized ferric alum - Optimization of poly electrolyte - Effect of ultrasound pre-treatment on optimized clay with normal optimized ferric alum and polyelectrolyte - Effect of ultrasound pre-treatment on optimized polyelectrolyte with optimized normal clay ferric alum - Effect of lime on ultrasound pre-treated polyelectrolytes in spent tannery vegetable tanning liquor - Effect of lime on ultrasound pre-treated clay in spent tannery vegetable tanning liquor - Particle size analysis of clay and effect of ultrasound treatment
- Table 1 : Optimization of lime in spent tannery vegetable tanning liquor and corresponding pH values
- table 2 : Optimization of different coagulants on SVT tannins or spent tannery vegetable tanning liquor coagulation for facilitating the settling process
- Table 3 : Effect of different optimized coagulants and influence of ultrasound pre-treatment on SVT tannins or spent tannery vegetable tanning liquor coagula(tion and settling rate characteristics during the settling process
- Table 4 : Effect of ultrasound (150 W at 20 kHz) on the particle size distribution of clay samples (1 g in 100 ml)DOI : https://doi.org/10.34314/jalca.v117i9.6167 En ligne : https://drive.google.com/file/d/11EepJ0UXlEqnC3EVIEXaqeR-iT3Jm2_r/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38076
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 9 (09/2022) . - p. 367-378[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23609 - Périodique Bibliothèque principale Documentaires Disponible Research recap of membrane technology for tannery wastewater treatment : a review / Fu Yang in COLLAGEN AND LEATHER, Vol. 5 (2023)
PermalinkSetting of consent limits for tanning industry trade effluents / R. M. Davies in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 1 (01-02/1997)
PermalinkA study of photocatalytic degradation of dyeing and printing wastewater by ZnO@zeolitic imidazolate framework (ZIF)-8 / Mu Hongjun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
PermalinkTannery effluent problems / K. W. Pepper in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXI (Année 1966)
PermalinkTannery effluent treatment updates / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 62 (11-12/2023)
PermalinkPermalinkThe effect of enzyme pre-treatment for tannery sludge / Li Xiaoxing in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 5 (09-10/2015)
PermalinkThe effect of salinity on the the treatment of tannery effluents and sludges / Richard Daniels in WORLD LEATHER, Vol. 18, N° 7 (11/2005)
PermalinkThermogravimetric analysis and pyrolysis kinetics of tannery wastes in an inert atmosphere / Lan Luo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 4 (04/2020)
PermalinkTotal dissolved solids management (TDS) in tanneries / A. Sahasranaman in WORLD LEATHER, Vol. 14, N° 7 (11/2001)
PermalinkToxicité et biodégradabilité des constituants principaux des effluents de tannerie / Arlette Folachier in TECHNICUIR, N° 2 (02/1978)
PermalinkUtilisation of phenolsulphonic acid to hydrolyse chrome shavings in preparation of composite condensates for leather retanning / Junqing Zhang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)
PermalinkValorisation of tannery waste and animal by-product for acoustics applications / Tesfay Gebryergs in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 6 (06/2021)
PermalinkWealth from tannery waste ? / Graham Lampard in LEATHER INTERNATIONAL, Vol. 214, N° 4826 (11-12/2012)
Permalink