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An ultrasound-assisted extraction procedure for the determination of banned azo dyes in leather / L. Ahlström in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 10 (10/2006)
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Titre : An ultrasound-assisted extraction procedure for the determination of banned azo dyes in leather Type de document : texte imprimé Auteurs : L. Ahlström, Auteur ; L. Mathiasson, Auteur Année de publication : 2006 Article en page(s) : p. 355-361 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The potential risk for consumers to be exposed to banned azo dyes in leather is strong motivation for the development of an analytical test procedure with improved accuracy. The currently most accepted analytical procedure for this application, the German standard DIN 53316 method, suffers from major drawbacks including low accuracy and the usage of hazardous organic solvents. As a consequence, an alternative procedure based on ultrasound-assisted extraction (UAE) was developed for the determination of banned azo dyes in leather. The optimized UAE procedure was applied to bovine, sheep, and goat leather. These results were compared with those obtained by employing the DIN 53316 method or microwave-assisted extraction (MAE). Usually, the performance of UAE was better than the DIN 53316 method and comparable to MAE. Furthermore, the UAE procedure utilizes acidified water as extraction solvent rather than methyl tert.-butyl ether. Because of its simplicity and the inexpensive equipment required, the proposed procedure has the potential to become the preferred alternative for analyzing banned azo dyes in leather on a routine basis. En ligne : https://drive.google.com/file/d/1L8dFJc_Kc2XGJVqWC4S2v1mMMMpTjupA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3973
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Code-barres Cote Support Localisation Section Disponibilité 005680 - Périodique Bibliothèque principale Documentaires Disponible An update on environmental constraints / Nicholas J. Cory in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 12 (12/2002)
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Titre : An update on environmental constraints Type de document : texte imprimé Auteurs : Nicholas J. Cory, Auteur Année de publication : 2002 Article en page(s) : p. 496-505 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Formaldehyde has no purpose in leather, and its presence is not prohibited by government regulation. However, due to its role in process chemical manufacture and preservation, formaldehyde is normally detected in leather at residual concentrations which exceed the very stringent limits enforced by automotive companies and leather product manufacturers. Like formaldehyde, NMP (n-methyl pyrrolidone) has no function in leather. However, it offers unique benefits as a solvent in the production of polyurethane (PU) finish systems, and significant residual concentrations have been detected in upholstery and shoe upper leathers coated with PU-based formulations. This means that the recent addition of NMP to California Proposition 65 will force the leather industry to seek alternative finish formulation technology unless a relatively high Safe Harbor level is quickly established. In addition, the listing of OPP (ortho-phenyl phenol) on Proposition 65 recently became effective. A Safe Harbor level has not yet been determined for OPP, forcing many suppliers to the Californian market to abandon the use of a very effective and widely used fungicide that is endorsed by the US military. A disturbingly small range of alternatives remain. These obstacles to the use of high performance retanning agents, some organic pigments, and PU finishes, together with the provisionally diminished range of acceptable fungicides is being compounded by continued focus on chromium by regulatory bodies in both Europe and the USA. This paper reveals and investigates the scientific flaws behind these latest environmental constraints. En ligne : https://drive.google.com/file/d/1UrJiWilHsG_KUyhu8Cvzi5S6iQ7cqVap/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4242
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Code-barres Cote Support Localisation Section Disponibilité 001581 - Périodique Bibliothèque principale Documentaires Disponible Anaerobic biological degradation of protein hydrolysate cross-linked with higher-molecular weight diepoxides / J. H. Krncirik in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 2 (02/2009)
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Titre : Anaerobic biological degradation of protein hydrolysate cross-linked with higher-molecular weight diepoxides Type de document : texte imprimé Auteurs : J. H. Krncirik, Auteur ; J. Pseja, Auteur ; J. Kupec, Auteur ; R. Noskova, Auteur ; J. Olsak, Auteur Année de publication : 2009 Article en page(s) : p. 36-45 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This work focuses on the influence of cross-linking with higher-molecular glycol diepoxides (and glycerol triglycidyleter) on biologic anaerobic degradation of protein hydrolysate (trade name hykol) produced from chrome-tanned wastes (shavings). Samples of hykol cross-linked with selected higher-molecular diepoxides were degraded with anaerobic sludge from a municipal plant at concentrations, in which organic carbon in samples in test bottles was approx. 200 mg/L, dry matter (inoculum) was 4.5g/L, temperature 35+. Biodegradation of tested modified hydrolysate samples produced recorded quantities of biogas (CH4, CO2). Anaerobic degradation rate of the samples was least reduced when polyethylene glycol (600) diglycidyl ether was employed as the cross-linking agent, and most reduced when glycerol triglycidyl ether was applied. Attention was also given to preparation, the determination of solubility, intrinsi viscosity and IR spectra of prepared samples. In comparison with hykol the degree of degradation decreased approx. from 70-50 %. These modified hydrolysates were studied as materials which have the potential to be used as good biodegradable films, e.g. for agricultural applications. En ligne : https://drive.google.com/file/d/1MdlhdTAmrkWu7eqoukXrIv9L8I0wAdRe/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4475
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Code-barres Cote Support Localisation Section Disponibilité 011099 - Périodique Bibliothèque principale Documentaires Disponible Anaerobic digestion of animal glue industry solid wastes / S. Pulavendran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 2 (03-04/2005)
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Titre : Anaerobic digestion of animal glue industry solid wastes Type de document : texte imprimé Auteurs : S. Pulavendran, Auteur ; R. Ganesh, Auteur ; A. Thangamani, Auteur ; K. Thirumaran, Auteur ; R. A. Ramanujam, Auteur Année de publication : 2005 Article en page(s) : p. 67-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésifs d'origines animales
Bio-méthanisation
Biogaz
Déchets industriels -- Recyclage
Déchets organiques -- Recyclage
Digestion anaérobieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Anaerobic digestion of animal glue industry solid wastes (AGISW) (residues from neutralised fleshings after glue extraction) was studied in a semi-continuous bench scale digester in order to determine the extent of the conversion into biogas. The Carbon/Nitrogen (C/N) ratio of AGISW is nearly 6.0. Solid wastes and wastewater from a local glue manufacturer were used as substrate for the anaerobic digestion. The study used a bench scale digester with a working volume of 6.5 litres operating at ambient temperature (28 ± 2°C). A hydraulic retention time (HRT) of 40 days and an Organic Loading Rate (OLR) of 3 ± 0.2 g /l. d were maintained during the study period. The study showed that 65 % of the volatile solids was destroyed. The average specific gas productions were 0.28 l /g of volatile solid added and 0.48 l/g of volatile solid removed. (Volatile solids are determined by ignition at 550°C and are a measure of the organic matter present in the waste - mainly denatured lipids and proteins).
The values of specific gas production and percentage Volatile Solids (VS) destruction are in agreement with those for industrial and agro industrial wastes reported in the literature. The results revealed an interesting fact that, anaerobic digestion of AGISW could be operated at high Volatile Fatty Acids (VFA) concentration without affecting gas production.
Anaerobic digestion of AGISW was studied for the first time with a view to managing solid wastes in an ecofriendly manner. The authors are of the view that this maiden attempt would help the industry manufacturing animal glue to use biogas from its waste resource as fuel.Note de contenu : - Feed preparation
- Experimental set-up
- Digester start-up and operation
- Analytical techniques
- Table 1 : Parameters of the waste characteristics before and after anaerobic digestionEn ligne : https://drive.google.com/file/d/1G5zrUHWHz-UPljLvB1vhNFcW3jqzNt4C/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39596
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 2 (03-04/2005) . - p. 67-70[article]Anaerobic treatment of tannery wastewater with sulfide removal and recovery of sulfur from wastewater and biogas / R. Suthanthararajan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 2 (02/2004)
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Titre : Anaerobic treatment of tannery wastewater with sulfide removal and recovery of sulfur from wastewater and biogas Type de document : texte imprimé Auteurs : R. Suthanthararajan, Auteur ; T. Ramesh, Auteur ; S. Rajamani, Auteur ; B. Umamaheswari, Auteur ; E. Ravindranath, Auteur ; K. Chitra, Auteur Année de publication : 2004 Article en page(s) : p. 67-72 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tannery wastewater contains high concentrations of sulfur compounds. Feasibility studies of pilot plant Sulfur Recovery Unit (SRU) integrated with Upflow Anaerobic Sludge Blanket (UASB) reactor, which is first of its kindin India, were carried out to study the sulfide removal efficiency for tannery wastewater. SRU consists of a stripper column, absorber column, regeneration unit and sulfur separator. Stripper efficiency of about 80-95 percentage in terms of sulfide removal was achieved for a sulfide load of 1-4 kg/d at a influent pH between 7.5-8.5. At sulfide load of 10 kg/d sulfide removal efficiency of about 65 percent was observed in the stripper unit. The absorber efficiency was more than 99.8 percent throughout the study period. The presence of SRU improved the COD removal efficiency in the UASB reactor. Elemental sulfur was obtained as a useful byproduct. Sulfate present in the wastewater is converted to sulfide in the UASB reactor. The sulfide in the dissolved form is stripped, absorbed and converted to elemental sulfur in the SRU. By this process, total dissolved solids (TDS) due to sulfate 'in the wastewater is also reduced. Biogas generated can be used as a fuel after scrubbing the hydrogen sulfide from it in the sulfur recovery system. En ligne : https://drive.google.com/file/d/1joezX_rhT0mjJzNbvvCRtb4uG4RWmoxu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4181
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Code-barres Cote Support Localisation Section Disponibilité 001597 - Périodique Bibliothèque principale Documentaires Disponible 001598 - Périodique Bibliothèque principale Documentaires Disponible PermalinkPermalinkPermalinkAnalysis and characterization of chromium sludge treated by acid leaching / Li Wen-Xin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 1 (01-02/2013)
PermalinkAnalysis and conservation of an 18th/19th century vegetable-tanned parchment manuscript / Gomaa Abdel-Maksoud in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 2 (03-04/2011)
PermalinkAnalysis of biological control materials encountered in leather production / A. Bugby in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 74 (Année 1990)
PermalinkAnalysis of dying by using fiber-optic spectroscopy with partial least-squares techniques / E. Mäntysalo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)
PermalinkAnalysis of hydroxyproline in collagen of pigskin tissue by low pressure ion chromatography separation and conductivity detection / Hong Dai in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 4 (07-08/2005)
PermalinkAnalysis of leather and materials used in making it / John Arthur Wilson / London [United Kingdom] : McGraw-Hill Publishing Co. (1931)
PermalinkAnalysis of leather oils / R. Craske in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 9 (09/1970)
PermalinkAnalysis of parachlorometacresol (PCMC) and otrhophenylphenol (OPP) in leather preservative formulations using derivative ultraviolet spectrophotometry / D. Muralidharan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 80, N° 4 (07-08/1996)
PermalinkAnalysis of pore-size and related parameters for leather matrix through capillary flow porosimetry technique / Venkatasubramanian Sivakumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 1 (01-02/2015)
PermalinkAnalysis of process safety and occupational health in leather Process industry : A Holistic approach / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 12 (12/2021)
PermalinkAnalysis of structure and properties of hydrophobic and non-hydrophobic fatliquored leather / Mariliz Gutterres in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)
PermalinkAnalysis of the composition of masked aluminium complexes by HPLC combined with capillary electrophoresis / Eisuke Takata in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 4 (04/1994)
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