A new defect on leather : microbial bio-film / B. H. Cadirci in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 4 (04/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 4 (04/2010) . - p. 129-134 Titre : A new defect on leather : microbial bio-film Type de document : texte imprimé Auteurs : B. H. Cadirci, Auteur ; Hasan Ozgunay, Auteur ; C. Vural, Auteur ; Onur Yilmaz, Auteur Année de publication : 2010 Article en page(s) : p. 129-134 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biofilms Cuirs et peaux -- Défauts Microscopie électronique à balayage Réaction en chaîne par polymérase Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hides and skins are protein based materials containing high amounts of water, which makes them a nutritionally rich media ideal for bacterial growth. Being also the essential raw materials in leather manufacture, it is vital to carefully protect them against bacterial action especially in the early wet processing stages. It is well known that bacterial action can seriously damage the fiber structure of hides and skins. Hair slip, red discoloration and grain pilling are typical examples of bacterial action can lead to damage with subsequent defects on the tanned leather. The present study identifies a new defect caused by bacteria known as "biofilm" on hides and skins. For investigation of the observed defective areas, two techniques were used : Scanning Electron Microscopy (SEM), and Real-Time Polymerase Chain Reaction (RT-PCR). The latter technique, RT-PCR, is a novel rapid method for unique detection, identification and quantification of microorganisms. The results, obtained by applying these techniques, verified the presence of "microbial biofilm" on the leather. Note de contenu : - Material - Methods : Imaging the leather samples - Molecular biological analysis of leather samples - Total bacterial DNA isolation - Real-time PCR En ligne : https://drive.google.com/file/d/1lzl-nEsnCg7Zyv8GaiccDIXZlEQVcbDE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21998 [article]

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Ozone as a biocide in soaking / M. Mete Mutlu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 1 (01-02/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 1 (01-02/2009) . - p. 18-20 Titre : Ozone as a biocide in soaking Type de document : texte imprimé Auteurs : M. Mete Mutlu, Auteur ; B. H. Cadirci, Auteur ; Hasan Ozgunay, Auteur ; A. C. Adiguzel, Auteur ; O. Sari, Auteur Année de publication : 2009 Article en page(s) : p. 18-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens Ozone Peaux brutes -- Trempe Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The soaking process poses the most significant bacterial threat to the raw material amongst all the beamhouse processes. In soaking various bactericides are used in order to avoid possible defects, these chemicals which are lethal to bacteria may also be harmful to the environment and human health. As an alternative to these chemical based bactericides, the possible use of ozone - which is used as an antimicrobial agent in various industries - in the leather industry is investigated. The effect of ozone applications of 5, 10 and 15 minutes per hour were investigated comparing it to the effect of a sodium dimethyl dithiocarbamide based bactericide. 15 minutes of ozone application has been found to be the most effective on bacterial growth prevention. En ligne : https://drive.google.com/file/d/1FxbykpFUyeuqnK7Eyt9zwkQRtfEdN_vo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4100 [article]

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Physical and antimicrobial characteristics of Aloe Vera treated split suede leather / Behzat Oral Bitlisli in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 2 (02/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 2 (02/2010) . - p. 34-40 Titre : Physical and antimicrobial characteristics of Aloe Vera treated split suede leather Type de document : texte imprimé Auteurs : Behzat Oral Bitlisli, Auteur ; I. Yasa, Auteur ; Ahmet Aslan, Auteur ; B. H. Cadirci, Auteur ; Bahri Basaran, Auteur Année de publication : 2010 Article en page(s) : p. 34-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aloe vera et constituants Antimicrobiens Cuirs et peaux -- Défauts Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study examined some characteristics of split suede leathers that were treated with a range of Aloe vera concentrations. Following the tanning process of split suede leathers, Aloe vera was applied at five different concentrations (2%, 4%, 6%, 8% and 10%). Leathers treated with Aloe vera took on a yellowish-brown color. Also, the moisture content and softness of the leathers increased according to the concentration of Aloe vera used, and the highest levels of both moisture content and softness were obtained at 8% and 10% application concentrations. The leathers that were treated with 6% or more Aloe vera had slightly higher tear load values when compared with control leathers. In addition, ethanol-based and water-based extracts of Aloe vera showed antimicrobial properties against some Gram (-) and Gram (+) bacteria and C. albicans. En ligne : https://drive.google.com/file/d/1A3fMyV6DVufBDJU8hbuj0PEaBWB7Lxq5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8156 [article]

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Utilization of collagen hydrolysate in keratinase production from bacillus subtilis ATCC 6633 / Ahmet Aslan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 4 (04/2007)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 4 (04/2007) . - p. 129-134 Titre : Utilization of collagen hydrolysate in keratinase production from bacillus subtilis ATCC 6633 Type de document : texte imprimé Auteurs : Ahmet Aslan, Auteur ; Huseyin Ata Karavana, Auteur ; G. Gulumser, Auteur ; I. Yasa, Auteur ; B. H. Cadirci, Auteur Année de publication : 2007 Article en page(s) : p. 129-134 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this study, chrome shavings from tanning industry were hydrolyzed with a commercial protease in alkali medium. Some chemical analyses were made and amino acid composition of collagen hydrolysate obtained from chrome shavings determined. This collagen hydrolysate was used for the production of keratinase from Bacillus subtilis ATCC 6633 as a carbon and nitrogen source. The culture grew in fermentation medium containing various proportion of collagen hydrolysate (1-5% w/v) at pH 7.0 and pH 10.0 with agitation rate of 200 rpm. The best keratinase production was obtained from the medium containing 1% hydrolysate (w/v) at pH 7.0 for 36 hours and with 3% hydrolysate (w/v) at pH 10.0 for 24 hours. En ligne : https://drive.google.com/file/d/1fF1_2B0896goPd5Blqsss2iwmxQUJdnn/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3361 [article]

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