Biodegradation by filamentous fungi of vegetable tannins used in the tanning industry / Franciela Spier in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 2 (03-04/2018) . - p. 59-63 Titre : Biodegradation by filamentous fungi of vegetable tannins used in the tanning industry Type de document : texte imprimé Auteurs : Franciela Spier, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2018 Article en page(s) : p. 59-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants Aspergillus Biodégradation Champignons microscopiques Pénicilliums Tanins végétaux Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery waste is complex and may, in some cases, be toxic to plants, animals and micro-organisms. This study aimed to evaluate the biodegradability of vegetable tannins used in the tanning industry by filamentous fungi. We evaluated the influence of the concentration of tannin, the forms of culture and the type of tannin used in the cultivation of Aspergillus niger. No differences were observed between the concentrations and the forms of cultivation. However, the type of tannin used influenced the consumption reaching 15% for a condensed tannin and only 7% for the hydrolysable. The results of the tests carried out proved the fungistatic action of the phenolic compounds present in the tannins on Aspergillus niger. With the new fungal strains, the fungi named Pe G8 showed to be more efficient in the biodegradation of tannins reaching 97.3% of the consumption of acacia tannin. The expressive results obtained from the consumption of acacia condensed tannin by the fungi of the genus Penicillium have demonstrated that the biodegradation of condensed tannins by filamentous fungi may be the promising alternative treatment with the potential to minimise tannery waste. Note de contenu : - Micro-organism - Submerged culture fermentation - Solid state fermentation - Analytical methods En ligne : https://drive.google.com/file/d/1QyZZtsfJf-3bYaJfRcGi1z2TqH2YxIjK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30557 [article]

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Biotechnological recovery of carbon fibers from fiber composites that are difficult to recycle / Evelyne Konopka in CHEMICAL FIBERS INTERNATIONAL, Vol. 72, N° 3 (09/2022)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 72, N° 3 (09/2022) . - p. 152-154 Titre : Biotechnological recovery of carbon fibers from fiber composites that are difficult to recycle Type de document : texte imprimé Auteurs : Evelyne Konopka, Auteur Année de publication : 2022 Article en page(s) : p. 152-154 Langues : Anglais (eng) Catégories : Aspergillus Biotechnologie Déchets industriels -- Elimination Fermentation Fibres de carbone -- Recyclage Fibres textiles synthétiques -- Biodégradation Recyclage organique Index. décimale : 677.4 Textiles artificiels Résumé : Carbon fiber reinforced polymers (CFRP) are classified as materials with high development potential. CFRP has exceptional properties such as high stiffness and strength combined with low density. However, recovery of the carbon fibers from the surrounding matrix is difficult. Currently, industrial recycling is mainly carried out by pyrolysis. A biotechnological recycling process would be a complementary alternative. The feasibility of such a process was investigated on the basis of the metabolic activity of specific microorganisms that are able to recycle such complex materials. Note de contenu : - Recycling and waste disposal - Biodegradation through microorganisms - Future potential ? - Fig. 1 : Changes in the epoxy-containing culture medium due to the influence of Aspergillus niger - Fig. 2 : Laboratory reactor, detailed view of A. niger during fermentation process in laboratory reactor and CFRP chips used in the laboratory tests - Fig. 3 : Pre-fermentation : epoxy matrix shows smooth surface, after 6 weeks of fermentation : epoxy matrix shows rough surface and denting is visible, indicating initial degradation En ligne : https://drive.google.com/file/d/1iOGuJvgbIy4qzPaUPPmo3t4mx90c0nN-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38168 [article]

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Identification and characterisation of Aspergillus sp. from leather / Muhammad Ali in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 6 (11-12/2021)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 6 (11-12/2021) . - p. 307-311 Titre : Identification and characterisation of Aspergillus sp. from leather Type de document : texte imprimé Auteurs : Muhammad Ali, Auteur ; Faiza Sharif, Auteur ; Ahmad Ali Shahid, Auteur ; Muhammad Adnan Zafar, Auteur ; Muhammad Asif, Auteur Année de publication : 2021 Article en page(s) : p. 307-311 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aspergillus Caractérisation Champignons microscopiques -- Identification Champignons pathogènes Cuirs et peaux -- Détérioration Cuirs et peaux de bovins Cuirs et peaux de buffles Cuirs et peaux de chèvres Cuirs et peaux de moutons Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Species of the genus Aspergillus are commonly known to be responsible for the degradation of tanned leather. In this study five species of Aspergillus (A. fumigatus, A. niger, A. flavus and A. ochraceopetaliformis) were isolated from tanned leather pieces of cow, goat, sheep and buffalo respectively. Among the isolated species A. ochraceopetaliformis was the first time reported from Pakistan. These isolated fungal strains were initially identified by their morphological and microscopic studies (conidial formation, conidial shape, size, colour, vesicle shape etc.) and then by means of molecular tools including genomic DNA isolation, PCR amplifications, genome sequencing and sequence analysis. Sequences were submitted to NCBI GenBank and accession numbers were assigned by NCBI. Phylogenetic analysis was also performed in order to calculate the percentage similarity as well as variation among the isolated species. Note de contenu : - MATERIAL AND METHODS : Collection of leather samples - Isolation of mycoflora - Molecular identification DNA isolation and amplification - PCR amplification - ITS data analysis - RESULTS : Morphological and microscopic identification of pathogenic fungi - Colony - Microscopic features - Table 1 : PCR amplification - Table 2 : Morphology and microscopy of leather degrading species of the genus aspergillus En ligne : https://drive.google.com/file/d/1sDLJtpYdUcYk1U48YAMWdrXv4UTQZRmF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36723 [article]

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Identification and characterization of potential biocide-resistant fungal strains from infested leathers - A systematic study / Kavitha Sundar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 2 (02/2020)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 2 (02/2020) . - p. 39-48 Titre : Identification and characterization of potential biocide-resistant fungal strains from infested leathers - A systematic study Type de document : texte imprimé Auteurs : Kavitha Sundar, Auteur ; Yasmin Khambhaty, Auteur ; Chandra Babu Narasimhan Kannan, Auteur Année de publication : 2020 Article en page(s) : p. 39-48 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aspergillus Caractérisation Champignons microscopiques Cuirs et peaux -- Conservation Résistance aux antimicrobiens Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study is aimed at identification of biocide tolerant/resistant fungal strains afflicting the leather industry. Fungal infestation occurs sometimes despite biocide treatment during leather processing. This persistent growth can be due to the development of biocide resistance which can lead to health hazards and economic loss. As no study has so far been reported to either confirm this or to identify such fungal strains, a systematic approach has been made in this study to address these aspects. Fungal strains were collected from infested leathers from tanneries to identify biocide resistant fungal strains afflicting leather industry. Phenotypic characterization revealed Aspergillus as the most dominant with 58% occurrence. Ten isolates were subjected to 18s rRNA sequencing and four strains were identified as Aspergillus niger. An in-vitro susceptibility to four leather fungicides was assessed to identify the biocide tolerant strains. S-6 A. niger strain was found to be the most tolerant as evidenced by high MIC (7.81µg ml-1) against the most effective biocide, 2-(thiocyanomethylthio) benzothiazole. In-vivo studies on chrome-tanned leathers also confirmed this finding. SEM studies revealed considerable morphological changes in S-6 compared to wild strain providing further evidence that it may have developed biocide resistance. Note de contenu : - MATERIALS AND METHODS : Source of media and chemicals - Collection of fungal infected leather samples from tanneries - Isolation and maintenance of fungal cultures - Phenotypic characterization - Genotypic identification and phylogenetic analysis - In vitro susceptility of the fungal strans against selected biocides - Studies on the growth of resistant strains on biocide treated leather - Scanning electron microscopy (SEM) analysis - RESULTS AND DISCUSSION : Phenotypic characterization - Genotypic characterization - In vitro susceptibility of the fungal strains against selected biocides - SEM analysis - Evaluation of growth of A. niger strains on biocide treated wet-blue leathers DOI : https://doi.org/10.34314/jalca.v115i2.1483 En ligne : https://drive.google.com/file/d/1OlDyUj9jtT8B0doew2qNKyYGrKhBm5KY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33889 [article]

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A manual of the aspergilli / Charles Thom / Baltimore [Etats-Unis] : The Williams & Silkins Company (1945)

Titre : A manual of the aspergilli Type de document : texte imprimé Auteurs : Charles Thom, Auteur ; Kenneth B. Raper, Auteur Editeur : Baltimore [Etats-Unis] : The Williams & Silkins Company Année de publication : 1945 Importance : 373 p. Présentation : ill. Format : 23 cm Note générale : Index - Bibliogr. Langues : Américain (ame) Langues originales : Américain (ame) Catégories : Aspergillus Index. décimale : 571.29 Physiologie des micro-organismes, des algues, des champignons : classer les ouvrages généraux à 579 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=1082

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Optimization and application of UVC irradiation for prevention of fungal biodeterioration of vegetable tanned and chrome tanned leather / Eshita Jhahan in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)

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The role of fungi isolated from historical vegetable-tanned leather on the degradation of peptides and amino acids / Gomaa Abdel-Maksoud in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 1 (01-02/2014)  

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