Performance of antimicrobial agents for the preservation of chrome leather / Juliana T. Fontoura in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 6 (06/2016)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 6 (06/2016) . - p. 221-229 Titre : Performance of antimicrobial agents for the preservation of chrome leather Type de document : texte imprimé Auteurs : Juliana T. Fontoura, Auteur ; D. Ody, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2016 Article en page(s) : p. 221-229 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption Adsorption Antifongiques Cuirs et peaux -- Analyse Cuirs et peaux -- Conservation Cuirs et peaux -- Lavage Tests microbiologiques Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Fungal growth in leathers causes significant damages like stains, surface roughness and loss of physical-mechanical resistance. This raises the need to develop control strategies by the use of antimicrobial agents. Considering the improving processes with regard to the use of antimicrobial agents added in skins and leathers to prevent their contamination by fungi, this study aims to evaluate the performance of six antimicrobial agents conventionally used in the leather industry, against four different fungi. These agents were applied during the chrome tanning process. Accelerated microbiological assays (tests plating and incubation on tropical chamber) were performed, as well as sorption and wash-out testing of three selected antimicrobial agents by UV/VIS spectrophotometry and verification of surface biodeterioration through SEM. Antimicrobial agents 2-thiocyanomethylthio benzothiazole (TCMTB) and Aqueous dispersion of 2-n-octyl-4-isothiazolin-3-one + methyl Nbenzimidazol- 2-ylcarbamate (OIT+BMC/water) showed antifungal capacity against different fungi tested applied in concentration of 0.2% (weight leather base). In the tropical chamber test, for the five samples of wet-blue leather treated with antimicrobial agents the growth of fungus was not observed. From the antimicrobial agents subjected to sorption testing and wash out, the TCMTB based antimicrobial agent presented rapid and high sorption in wet blue leather and also has resistance to washing. Note de contenu : - MATERIALS AND METHODS : Materials and application of antimicrobial agents to leather - Plating test - Incubation in a tropical chamber - Sorption and wash out - Scanning electron microscope images - RESULTS AND DISCUSSION : Plating test - Incubation in a tropical chamber - Sorption and wash out - Scanning electron microscope studies En ligne : https://drive.google.com/file/d/1wr6V_36Odg8tKYVy7fxXCr8ixeXIZkYH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26439 [article]

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Performance of microbicides for the preservation of vegetable tanned leather / Juliana T. Fontoura in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 7 (07/2016)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 7 (07/2016) . - p. 259-266 Titre : Performance of microbicides for the preservation of vegetable tanned leather Type de document : texte imprimé Auteurs : Juliana T. Fontoura, Auteur ; D. Ody, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2016 Article en page(s) : p. 259-266 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antifongiques Formulation (Génie chimique) Produits de conservation du cuir Tannage végétal Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the tanning industry, the deterioration of leather due to the development of fungi is of great concern. Some fungi metabolize important substances in leather, causing serious damage such as pigmented stain that is difficult to remove, defects, surface roughness, and loss of physical and mechanical resistance, which affect the quality of the final product. This work evaluated the performance of five microbicides conventionally used in the leather industry, against different fungi. Microbicides were applied during the tanning process with vegetable tannin in the fatliquoring step. Accelerated microbiological tests (plating and tropical chamber) were performed. The results revealed a low antifungal capacity of selected microbicides when applied at an offer of 0.2% (mass hide base) fungicides. Treatment with OIT+BMC/water at an offer of 0.75% showed satisfactory fungal protection against different fungi tested and proved to be the most suitable for the preservation of vegetable tanned leather. Note de contenu : - Materials and application of microbicides to leather - Accelerated microbiological tests - Plating test - Incubation in a tropical chamber - Scanning electron microscopy (SEM) - TABLES : 1. Formulation of tanning process with vegetable tannin - 2. Inhibition distance (ID) and fungal growth on the surface (FGS) after 28 days on vegetable tanned leather samples En ligne : https://drive.google.com/file/d/19V571dRsyJUQtBXny5Y332Wi4HA95uMc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26716 [article]

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