Optimisation of hot-pressing technique for bonded leather with CR adhesive / Yinghua Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 2 (03-04/2020)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 2 (03-04/2020) . - p. 77-82 Titre : Optimisation of hot-pressing technique for bonded leather with CR adhesive Type de document : texte imprimé Auteurs : Yinghua Ma, Auteur ; Dongsheng Xin, Auteur ; Runting Xia, Auteur ; Shaolan Ding, Auteur ; Fei Ma, Auteur Année de publication : 2020 Article en page(s) : p. 77-82 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contre-collage Cuir -- Collage Cuirs et peaux -- Déchets -- Recyclage Latex Pressage à chaud Résistance à la traction Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Large quantities of waste chrome leather shavings are produced during the tanning process. Recycling waste chrome shavings is carried out in a clean, simple, low-consumption manner inspired by the technology of solid wood particle board in the furniture industry, thus making high value products. This paper prepared bonded leather (BL) using CR adhesive and a vulcanising machine, the BL prepared had gond gas permeability, water absorption, and adequate tensile strength, the optimal hot-pressing conditions and formulae used were: (1) latex ratio 20%, 70°C, 5 minutes and 3MPa; (2) latex ratio 23%, 80°C, 4 minutes and 3MPa; (3) latex ratio 18%, 80°C, 5 minutes and 6MPa. Note de contenu : - METHODOLOGY : Main materials - Hot-press forming process - Measurement of physical-mechanical properties for BL - RESULTS ANALYSIS : Single factor test - Orthogonal test En ligne : https://drive.google.com/file/d/1IlQ8709yBLKJp57zK_Aiom5y2cA23YqW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33912 [article]

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Optimization of keratinolytic protease production by purpureocillium lilacinum LPS # 876 as a sustainable management of tannery hair waste / Ivana Alejandra Cavello in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 8 (08/2013)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 8 (08/2013) . - p. 300-310 Titre : Optimization of keratinolytic protease production by purpureocillium lilacinum LPS # 876 as a sustainable management of tannery hair waste Type de document : texte imprimé Auteurs : Ivana Alejandra Cavello, Auteur ; Sebastiàn Fernando Cavalitto, Auteur Année de publication : 2013 Article en page(s) : p. 300-310 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biodégradation Cuirs et peaux -- Déchets -- Recyclage Déchets organiques -- Recyclage Kératinases Poils -- Recyclage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Hair waste is recognized as a solid waste generated after a hair-saving unhairing process in leather technology, and it is produced in large amounts in Buenos Aires province, Argentine. The present method for this solid waste is disposal, which is environmentally troublesome and costly for the tanneries. Biodegradation of hair waste by keratinolytic microorganisms represents an alternative for bioconversion of keratin waste. This paper reports the optimization of keratinases production by Purpureocillium lilacinum LPS # 876. Firstly, one factor-at-a-time method was used to investigate the effect of nitrogen-sources, metal ions concentration in the basal mineral medium, as well as, initial pH and temperature on enzyme production. Medium composition for the keratinases production by P. lilacinum was optimized using two statistical methods: Plackett-Burman design and central composite design -combined with response surface methodology- used to optimize three significant variables: initial pH, glucose and CaCl2. The optimal conditions were determined as 7.10 g l-1 of glucose; 0.0065 mg l-1 of CaCl2 and initial pH of 5.60; at this condition the maximum keratinase yield predicted was 26.7 U ml-1. The model validation showed that it described adequately the influence of glucose and calcium concentration and initial pH on enzyme production. Production of keratinases by P. lilacinum is a less-exploited field that might represent a novel and promising biotechnological application for this microorganism. Note de contenu : - MATERIALS AND METHODS : Reagents - Microorganism and culture conditions - Determination of proteolytic activity - OPTIMIZATION OF FERMENTATION MEDIUM USING ONE-VARIABLE-AT-A-TIME METHOD : Effect of environmental conditions on production keratinases - Effect of the concentration of the metal ions present in the basal mineral medium - Effect of the addition of some salts on keratinolytic enzymes production - Effect of nitrogen sources - Identification of the significant factors by Plackett-Burman (PB) design - Central Composite Design and Response Surface Methodology - BIOCHEMICAL PROPERTIES OF CRUD ENZYME : Detection of keratinolytic activity on polyacrylamide gels (casein and keratin-zymograms) - Substrate specificity - RESULTS : Optimization using one-variable-at-a-time approach - Selection of significant variables by Plackett-Burman design - Optimization by response surface methodology (RSM) - Detection of keratinolytic activity on polyacrylamide gels (casein and keratin-zymograms) - Substrate specificity En ligne : https://drive.google.com/file/d/1UOY6o8dh6sX7U4bHC-G1WlIdxLmn3DgC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19179 [article]

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Oxidative beamhouse processing / Gustavo Adriàn Defeo in LEATHER INTERNATIONAL, Vol. 214, N° 4821 (06/2012)  

[article]  inLEATHER INTERNATIONAL > Vol. 214, N° 4821 (06/2012) . - p. 26-28 Titre : Oxidative beamhouse processing Type de document : texte imprimé Auteurs : Gustavo Adriàn Defeo, Auteur ; Sergio Dani, Auteur Année de publication : 2012 Article en page(s) : p. 26-28 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage Eaux usées -- Epuration Eaux usées -- Recyclage Odeurs -- Lutte contre Oxydants Oxydation Protéines Récupération (Déchets, etc.) Recyclage (déchets, etc.) Retannage Travail de rivière (cuir) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The beamhouse process is known to contribute around 75% of the wastewater pollution charge in a typical tanning process. Water consumption from raw to the end of deliming process is about 10-12 litres per kg of salted hide, a value which increases in calves and small skins. This process contributes 83% of BOD5, 73% of COD, 60% of suspended solids and 75% of the salinity of the complete process. From the organoleptic point of view the beamhouse processing steps contribute negatively to a tannery's image, mostly because of sulphides. The idea of an alternative oxidative beamhouse process is to recover proteins, reduce the environmental impact of the tannery and generate new opportunities of useful clean by-products, while at the same time reducing the bad smell. This paper considers some practical issues on the industrial implementation of a sulphide free beamhouse process that aims for total water recycling, and the generation of useful by-products. Note de contenu : - View of the process - Process logic - Hair save vs hair burn - Technical developments for oxidative beamhouse - Environmental waste treatment - Retanning trials En ligne : https://drive.google.com/file/d/1WYX9TeL_D2Y9RbV7rvufW8sLJ8a8qf8O/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15268 [article]

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Parameters for composting tannery hair waste / Arthur Onyuka in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 5 (05/2012)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 5 (05/2012) . - p. 159-166 Titre : Parameters for composting tannery hair waste Type de document : texte imprimé Auteurs : Arthur Onyuka, Auteur ; Margaret Bates, Auteur ; Geoffrey E. Attenburrow, Auteur ; Anthony D. Covington, Auteur ; A. Paula M. Antunes, Auteur Année de publication : 2012 Article en page(s) : p. 159-166 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biodégradation Compostage Cuirs et peaux -- Déchets -- Recyclage Poils -- Recyclage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Solid hair waste is generated by the leather industry as a by-product of the leather manufacturing process. Keratin, the main structural constituent of hair proteins, is highly resistant to degradation and their disposal is of environmental concern. The aim of this study was to develop conditions favorable for the degradation of bovine hair in a composting environment as an environmentally friendly option for the management of solid tannery hair waste. The thermophilic optimum temperature, 40 – 50°C, moisture content 55%, pH 7.0 and a carbon to nitrogen ratio of 35:1 were found to be favorable to sustain metabolic functions of thermophilic microbial flora, responsible for degrading keratins. The biodegradation and structural transformation of the substrate was assessed using scanning electron microscopy. The results show that under these conditions the bovine hair lost most of its integral structural stability and that the cuticular components were more resistant to degradation. The compost stability as evaluated by monitoring the degree of humification and carbon to nitrogen ratio indicated that the final product achieved reasonable stability by attaining 73% degree of humification, 26% humification rate and carbon to nitrogen ratio of 29:1. Hence the composting technology used in this study has a potential application in the leather industry for the production of an economically viable product. Note de contenu : - MATERIALS AND METHODS : Materials - Methods (composting process - carbon and nitrogen - pH, moisture, and temperature - Scanning electron microscopy (SEM)) - Humidification parameters - RESULTS AND DISCUSSION : pH, moisture and temperature - Carbon nitrogen - Humidification parameters - Physical changes En ligne : https://drive.google.com/file/d/1Eob_Lrjl7CyzvjoxzTjt8E6P2AnhXBX6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15002 [article]

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Possibility of synthesis of nanoporous silica using hide powder as a template / Satoru Dohshi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 5 (09-10/2011)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 5 (09-10/2011) . - p. 200-203 Titre : Possibility of synthesis of nanoporous silica using hide powder as a template Type de document : texte imprimé Auteurs : Satoru Dohshi, Auteur Année de publication : 2011 Article en page(s) : p. 200-203 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Cuirs et peaux -- Déchets -- Recyclage Désorption Matériaux poreux Microscopie électronique à balayage Nanoparticules -- Synthèse Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nanoporous silica has been successfully synthesized using hide powder as a template. The nanoporous silica possessed micropores and/or mesopores and a large specific surface area of over 900m2-1. It was found from the results of N2 adsorption - desorption isotherm measurements that the pH value of the synthesis mixtures mainly affected the pore structure and the surface area of nanoporous silica. Moreover, from the results of SEM observations, this nanoporous silica, regardless of the synthesis conditions, was composed of fibrous silica, which resembled the collagen fibril structure. These results showed the possibility of novel effective use of leather wastes for the synthesis of functional materials. Note de contenu : - Hide powder - Synthesis - Characterization En ligne : https://drive.google.com/file/d/1o9Jcy1Nyv1iV6J1HaLrPiCsDw-3VIpkQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12219 [article]

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Preparation and application of a high exhaustion chrome tanning auxiliary from limed fleshings / Hongjiao Liang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)  

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Preparation and characterisation of tannery solid waste as an alternative biosorbent for leather dyes / Bianca Mella in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

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Preparation and characterization of decellularized ECM hydrogel from adipose tissues of hide/skin : Unlocking untapped resource potential / Gayathri Devi Chakrapani in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 7 (07/2024)  

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Preparation and characterization of modified protein retanning agent based on leather waste / Wang Xuechuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 3 (05-06/2016)  

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Preparation and characterization of nano-reinforced leather waste fiber-epoxy nano composite / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 12 (12/2015)  

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Preparation of amino-terminated hyperbranched buffing dust and its adsorption property towards acid fuchsin : Use of an industry by-product to adsorb dyestuffs / Jie Liu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 1 (01-02/2021)  

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Preparation of a biomass adhesive based on bamboo and leather shavings / Yiwei Zhang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 2 (03-04/2020)  

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Preparations of nonwoven and green composites from collagen fibrous networks in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 2 (02/2014)  

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Production of high carbon ferrochromium alloy from footwear leather waste ash through a carbothermic reduction in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 11 (11/2012)  

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Protein retanning and filling agent from vinyl monomer graft modification of chrome shavings hydrolysate / Ma Jianzhong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 1 (01-02/2004)  

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Pyrolysis of chromed leather waste shavings in fluidized bed / Taysnara Simioni in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 10 (10/2014)  

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Raw skin wastes - used to prepare a flocculant for the treatment of black liquor for papermaking / Chi Yuanlong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 5 (09-10/2011)  

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Reaction of gelatin and chitosan with water soluble carbodiimides / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 2 (02/2017)  

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Recovery 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)  

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Recovery and utilisation of waste products from the leather industry / Benias Nyamunda / Saarbrücken [Germany] : Lambert Academic Publishing (2013)

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