An explanation of an hydrothermal stability anomaly in some chrome tanned leathers / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 72 (Année 1988)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 72 (Année 1988) . - p. 30-31 Titre : An explanation of an hydrothermal stability anomaly in some chrome tanned leathers Type de document : texte imprimé Auteurs : Anthony D. Covington, Auteur Année de publication : 1988 Article en page(s) : p. 30-31 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage En ligne : https://drive.google.com/file/d/1gPM3zTkrZv0WcLc-FLqDLrdG2Lwp3Oe4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9093 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
007134	-	Périodique	Bibliothèque principale	Documentaires	Disponible

An investigation of titanium (III) as a tanning agent / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 82, N° 2 (03-04/1998)

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 82, N° 2 (03-04/1998) . - p. 78-80 Titre : An investigation of titanium (III) as a tanning agent Type de document : texte imprimé Auteurs : Anthony D. Covington, Auteur ; Graham Lampard, Auteur ; M. Pennigton, Auteur Année de publication : 1998 Article en page(s) : p. 78-80 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A review of the periodic table demonstrates that while many elements may be capable of tanning, only a few useful options exist. One of these is titanium ; the usual compounds for tanning agents are based on the stable (IV) oxidation state or, more empirically, the TiO2+ ion. However, there is also Ti(III) which can exist as the hexaaquotitanium (iii) ion, [Ti(HéO)6]3+, a metastable oxidation state with the potential for tanning. A literature search has revealed a dearth of information about the complex chemistry of titanium (III). However, there are magnetic resonance spectroscopy techniques available to investigate complex formation. The reaction between Ti(III) and vegetable tannin has been investigated and a method to determine the titanium content of leathers developed. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7870 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
007021	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Application of diphenols for dyeing / Ono Suparno in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 4 (07-08/2007)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 4 (07-08/2007) . - p. 139-141 Titre : Application of diphenols for dyeing Type de document : texte imprimé Auteurs : Ono Suparno, Auteur ; Anthony D. Covington, Auteur ; C. S. Evans, Auteur Année de publication : 2007 Article en page(s) : p. 139-141 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Cuirs et peaux -- Teinture Dihydroxynaphtalènes Laccases Les laccases (EC 1.10.3.2) appartiennent à une famille d'enzymes ayant pour cofacteur du cuivre. C'est une oxydase (oxydoréductase, EC 1) que l'on retrouve dans de nombreuses plantes, champignons et micro-organismes. Le cuivre est lié sur plusieurs sites de la protéine. On distingue trois types. Les types 2 et 3 sont appelés grappe tri-nucléaire. Le cuivre du type 1 est soluble dans l'eau. Le mercure déplace le cobalt complexé dans les laccases. Les complexants du cuivre peuvent le déplacer et le remplacer par du cobalt. Les cyanures complexent également le cuivre, mais dans ce cas il n'est pas possible de réinsérer du cobalt. Les laccases oxydent les dérivés phénoliques mais d'une façon ménagée qui transforme la lignine en monolignol. Pigments -- Synthèse Pigments organiques Stabilité hydrothermale Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : An alternative to the normal dyeing route to achieving colour in leather is to exploit the chemistry of creating the natural skin and hair pigments, melanins. 1,8-dihydroxynaphthalene and other dihydroxynaphthalenes can be oxidised and polymerised to create pigment products by reactions catalysed by laccase, a polyphenol oxidase. They not only create colour, but, if the reactions are conducted in the presence of collagen, the pigments are bound to the collagen by covalent bonds, which confer a tanning effect. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Dyeing experiments - Measurements of colour - Measurement of hydrothermal stability - RESULTS AND DISCUSSION : Hydrothermal stability - Table 1 : Chromaticity a* and b* values of hide powder dyed with DHNs and laccase - Table 2 : Hydrothermal stability of hide powder dyed with DHNs and laccase (important results in bold) En ligne : https://drive.google.com/file/d/1AbLBs3IlFKBJaYw-RP8s-de7PBc7JAuJ/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39017 [article]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

Application of gelatin extracted from chrome shavings for the glazed finishing of leather / M. Catalina in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 5 (05/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 5 (05/2010) . - p. 138-144 Titre : Application of gelatin extracted from chrome shavings for the glazed finishing of leather Type de document : texte imprimé Auteurs : M. Catalina, Auteur ; Geoffrey E. Attenburrow, Auteur ; J. Cot, Auteur ; Anthony D. Covington, Auteur ; A. Paula M. Antunes, Auteur Année de publication : 2010 Article en page(s) : p. 138-144 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The objective of this work was to ascertain the performance of extracted gelatin from dechromed leather shavings as a coating in the finishing of leather. Gelatin is a protein-ased material isolated from chrome-tanned collagenic wastes. A comparison between a commercial protein-based product, extracted gelatin and a mixture of extracted gelatin/glycerol was carried out. Based on the results obtained in previous studies, two fixing agents were used to fix the finishing : 5-ethyl-1-aza-3,7-dioxabicyclo[3,3]octane (oxazolidine II) and ethylene glycol diglycidyl ether (EGDE). The mixture gelatin/glycerol (using glycerol as a plasticiser) presented satisfactory results, compared with the commercial product, for the abrasion, gloss and flex resistance, although a poor performance under wet rub fastness (assessment of 1 on the grey scale (ISO 105-A02, A03) and adhesion tests were found due to the hygroscopic nature of glycerol. The formulation for potential further studies was the extracted gelatin fixed with EGDE which showed the best performance on dry rub fastness (4-5 on the grey scale) and finish adhesion, and a good performance on resistance to abrasion and to flex (low loss of finishing and no cracking observed). The results confirmed the optential for gelatin, obtained from chrome shavings, to be used as a leather finishing agent. En ligne : https://drive.google.com/file/d/1BO1nsFXR6X0nyzNYe_RCH-6UdKfUJrBq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9358 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
012157	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Bangladeshi leather industry : an ovierview of recent sustainable developments / H. L. Paul in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 1 (01-02/2013)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 1 (01-02/2013) . - p. 25-32 Titre : Bangladeshi leather industry : an ovierview of recent sustainable developments Type de document : texte imprimé Auteurs : H. L. Paul, Auteur ; A. Paula M. Antunes, Auteur ; Anthony D. Covington, Auteur ; P. Evans, Auteur ; P. S. Phillips, Auteur Année de publication : 2013 Article en page(s) : p. 25-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Industrie -- Aspect de l'environnement Cuirs et peaux -- Industrie -- Bangladesh Développement durable Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The government of Bangladesh has indentified the leather sector as one with considerable growth and investment potential ranked fifth in the export earning sector. Currently Bangladesh produces and exports quality bovine and ovine, caprine (buffalo and cow ; sheep and goat) leathers that have a good international reputation for fine textured skins. However, the entire leather sector meets only 0.5% of the world's leather trade worth US$75 billion. There are about 113 tanneries in Bangladesh that produce 180 million square feet of hides and skins per year. In addition there are about 30 modern shoe manufacturing plants engaged in the production of high-quality footwear, with over 2500 smaller footwear manufacturers also present in the sector. There are around 100 smaller-to-medium leather goods manufacturers, and a small number of niche larger manufacturers. The sector directly employs approximately 558 000 people. Most of the tanneries do not have proper effluent plants and generate 20 000m3 tannery effluent and 232 tonnes solid waste per day. Tannery liquid and solid wastes are a potential pollutant but also have a potential value. Specific technologies to convert wastes are required. These vary from crude and simple to highly sophisticated and complex. A proposed new leather park is expected to bring a clear transformation to the leather industry with a market increase in production, product diversification and new product lines with increased sustainability of the sector. Sustainable and cleaner production will be a key issue for the development without placing burdens on the environment. Note de contenu : - INTRODUCTION : Leather in Bangladesh - Tanning in Bangladesh - Livestock in Bangladesh - Leather export performance - Professional associations - CURRENT METHODS OF DISPOSAL OF SOLID AND LIQUID WASTE FROM THE BANGLADESH LEATHER INDUSTRY - CASE STUDY PROJECT : UNIDO - RE-TIE BANGLADES - CASE STUDY OF RECENT RESEARCH - CASE STUDY : EFFLUENT TREATMENT PLANT (ETP) - CASE STUDY : IMPACTS ON COMMUNITY OF POLLUTION - POSSIBLE TANNERY RELOCATIONS : TANNERY ECONOMIC ZONE En ligne : https://drive.google.com/file/d/11IyGpmwsrzJPIcUFSS6GQf6v6o6ZMO2_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17450 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14631	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Chrome tanning : exploding the perceived myths, preconceptions and received wisdom / Anthony D. Covington in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 12 (12/2001)  

Permalink

Collagen and polyphenols : new relationship and new outcomes. Part 1. Flavonoid reactions for new tanning processes / Anthony D. Covington in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 9 (09/2005)  

Permalink

Collagen and polyphenols : new relationships and new outcomes. Part 2. Phenolic reactions for simultaneous tanning and coloring / Anthony D. Covington in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 9 (09/2005)  

Permalink

Current trends in leather science / Anthony D. Covington in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

Permalink

Dynamic mechanical thermal analysis (DMTA) of leather. Part 1 : Effect of tanning agent on the glass transition temperature of collagen / S. Jeyapalina in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 6 (11-12/2007)  

Permalink

Effect of hyaluronic acid on the properties of chrome-tanned leather / M. A. R. Siddique in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 2 (03-04/2015)  

Permalink

High stability organic tanning using plant polyphenols. Part 1 / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 82, N° 2 (03-04/1998)

Permalink

High stability organic tanning using plant polyphenols. Part 2 / Bi Shi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 83, N° 1 (01-02/1999)

Permalink

Investigating the cell rotary conditioning mechanism using dynamic mechanical thermal analysis / Karl Flowers in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 10 (10/2015)  

Permalink

Investigation into deep eutectic solvents / Andrew Abbott in LEATHER INTERNATIONAL, Vol. 217, N° 4860 (05/2016)  

Permalink

Investigation of leather drying by dynamic mechanical thermal analysis (DMTA) / S. Jeyapalina in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 3 (05-06/2007)  

Permalink

Leather science : requisite or requiem ? / Anthony D. Covington in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 8 (08/2012)  

Permalink

Link lock : an explanation of the chemical stabilisation of collagen / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 1 (01-02/2008)  

Permalink

Mechanistic studies of mineral tanning - Part I : / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 73 (Année 1989)  

Permalink

Methods of isolation and identification of pathogenic and potential pathogenic bacteria from skins and tannery effluents / Anne Lama in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 2 (02/2013)  

Permalink

---

1 2 3 (1 - 20 / 50) Par page : 25 Tout afficher