Antibacterial activities of lichen derived extracts against different bacillus species from soak liquor samples / Didem Berber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 3 (03/2020)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 3 (03/2020) . - p. 96-104 Titre : Antibacterial activities of lichen derived extracts against different bacillus species from soak liquor samples Type de document : texte imprimé Auteurs : Didem Berber, Auteur Année de publication : 2020 Article en page(s) : p. 96-104 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Bactéries à gram positif Bain de trempe Chimie analytique Concentration minimale inhibitrice (antimicrobiens) En microbiologie, la concentration minimale inhibitrice (CMI) est la plus faible concentration d'un produit chimique, généralement un médicament, qui empêche la croissance visible d'une ou de plusieurs bactéries. La CMI dépend du micro-organisme considéré, de l'être humain affecté (in vivo uniquement) et de l'antibiotique lui-même. La CMI est déterminée en préparant des solutions du produit chimique in vitro à diverses concentrations croissantes, en incubant les solutions avec des groupes séparés de bactéries en culture et en mesurant les résultats en utilisant une méthode de dilution standardisée (agar ou microdilution). Les résultats se classent ensuite comme "sensible", "intermédiaire" ou "résistant" à un antimicrobien particulier en utilisant un point d'arrêt. Les points d'arrêt sont des valeurs convenues, publiées dans les directives d'un organisme de référence, comme le US Clinical and Laboratory Standards Institute (CLSI), la British Society for Antimicrobial Chemotherapy (BSAC) ou le Comité européen sur les tests de sensibilité aux antimicrobiens (EUCAST). On a pu constater des écarts importants au niveau des points d'arrêt de divers pays européens au fil des ans, et entre ceux de l'EUCAST et du CLSI. Alors que la CMI est la concentration la plus faible d'un agent antibactérien nécessaire pour inhiber la croissance visible, la concentration bactéricide minimale (CBM) est la concentration minimale d'un agent antibactérien qui entraîne la mort bactérienne. Plus la CMI est proche de la CBM, plus le composé est bactéricide. La première étape de la découverte d'un médicament est souvent le dépistage d'un médicament candidat de banque de données pour les CMI contre les bactéries d'intérêt. En tant que tels, les CMI sont généralement le point de départ pour de plus grandes évaluations précliniques de nouveaux agents antimicrobiens. Le but de la mesure de la concentration minimale inhibitrice est de s'assurer que les antibiotiques sont choisis efficacement pour augmenter le succès du traitement. (Wikipedia) Extraction (chimie) Lichens et constituants Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the leather industry, some bacterial strains may become resistant to antibacterial agents utilized in the soaking process due to long-term use and/or not using in sufficient doses. Alternative approaches or novel agents need to be investigated to overcome antibacterial resistance of bacteria present in the soaking process. These alternative approaches may be from natural resources such as lichens which are known to have various biological activities such as antibacterial, antifungal etc. For this purpose, soak liquor samples from different tanneries were collected and eight isolates from these samples were identified by cultural and molecular techniques. Also, the antibacterial effects of acetone extracts of Hypogymnia physodes, Evernia divaricata, Pseudevernia furfuracea and Usnea sp. at different concentrations were tested on these isolates. They were all Gram (+), rod shaped, oxidase (+), catalase (+), protease (+). Six isolates had lipase activities. The isolates were assigned to Bacillus toyonensis, B. mojavensis, B. subtilis, B. amyloliquefaciens, B. velezensis, B. cereus, and B. licheniformis in molecular analyses. The acetone extracts of Evernia divaricata totally killed B. toyonensis, B. mojavensis, B. amyloliquefaciens, and B. subtilis at the concentrations of 240, 120, 60 and 30 µg/ml, respectively. These extracts had also significant antibacterial efficacies on B. cereus, B. velezensis, B. licheniformis at the concentration of 240 µg/ml. The acetone extracts of P. furfuracea had a great inhibitory effect on the growth of most species (80.24-88.65%) only at the concentration of 240 µg/ml. H. physodes acetone extracts totally killed B. amyloliquefaciens and had considerably high suppressive effect on the growth of other tested bacteria at the concentrations of 120 and 240 µg/ml. Usnea sp. acetone extracts had inhibitory effect on Bacillus species (86.6-97.9%) even at the 30 µg/ml concentration. In this respect, lichens may provide an alternative approach for the leather industry to overcome bacterial resistance to the antibacterial agents. Note de contenu : - Bacterial strains - Gram staining, oxidase-catalase tests and selective media - Protease and lipase activity - Molecular analyses - Lichen samples - Extraction of lichen samples - Minimum inhibitory concentration (MIC) - Table I : Isolate codes, closest relatives similarities, gram staining, oxidase and catalase tests, bacterial growth on selective media, protease and lipase activity results of eight isolates collected from soak liquor samples of different tanneries - Table II : The percentage of bacterial growth inhibition for tested lichen extracts DOI : https://doi.org/10.34314/jalca.v115i03.1627 En ligne : https://drive.google.com/file/d/143LDbTUNPjhNUoR1_307Trtl8RzJTLj_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33887 [article]

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Antibacterial and anti–biofilm activities of acetone extracts of Usnea sp. against mixed cultures of bacteria from soak liquor samples and tank surfaces / Didem Berber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 10 (10/2020)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 10 (10/2020) . - p. 365-372 Titre : Antibacterial and anti–biofilm activities of acetone extracts of Usnea sp. against mixed cultures of bacteria from soak liquor samples and tank surfaces Type de document : texte imprimé Auteurs : Didem Berber, Auteur ; Ipek Türkmenoglu, Auteur ; Nüzhet Cenk Sesal, Auteur Année de publication : 2020 Article en page(s) : p. 365-372 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acétone L'acétone en chimie, (nom officiel IUPAC propanone, aussi connue sous les noms de diméthylcétone, 2-propanone, propan-2-one et béta-cétopropane), de formule chimique CH3COCH3 est le composé le plus simple de la famille des cétones. C'est un isomère du propanal.L’acétone est un liquide transparent, inflammable, d'odeur caractéristique (plutôt fruitée). Sa température de fusion est de -95,4 °C et celle d'ébullition de 56,53 °C. Elle a une densité relative de 0,819 (à 0 °C). C'est un composé très soluble dans l'eau (c'est une molécule polaire à chaîne carbonée courte), dans l'éthanol et dans l'éther. L'acétone est le dérivé le plus simple de la série des cétones aliphatiques et la présence de la double liaison carbone-oxygène lui confère l'essentiel de sa réactivité. Antibactériens Biofilms Cuirs et peaux -- Conservation Lichens et constituants Peaux brutes -- Trempe Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Long-term or improper use of antibacterial agents utilized in the soaking process has led to the resistance of some bacteria in the leather industry. New agents may be the solution to combat these antibacterial resistant bacteria in the soaking process. As a natural resource, lichens are known to have many biological activities. In previous studies, we demonstrated that the acetone extracts of several lichen species including Usnea sp. may have potential antibacterial and anti–biofilm properties against some Bacillus species, which were isolated from different soak liquor samples. In the present study, it was questioned whether the same bioactivities of acetone extracts of Usnea sp. can be seen in the mixed cultures of tank surface samples and pre-and main soak liquor samples, which were obtained from different tanneries. Although the extracts did not show noteworthy antibacterial effect against one of the tank surface samples (inhibition ratios; 6.5–16.22 %), inhibition percentages were detected as 69.32 and 46.33 at the concentrations of 240 and 120 µg/mL for the other tank surface sample. The anti-biofilm potential of the extracts was tested on the sample where the antibacterial activity of the extracts was not observed. One of the mixed culture of samples from the tank surface could not be inhibited by the extracts in terms of bacterial growth. However, the extracts were tested on this biofilm-forming sample and detected more than 50% inhibition. Furthermore, the extracts inhibited the growth of the mixed culture of bacteria from pre-soak liquor by the percentages of 78.96, 61.5, 51.3, 45.1, and 33.4 at the concentrations of 240, 120, 60, 30 and 15 µg/mL, respectively. On the other hand, the same antibacterial efficacy could not be observed in the other mixed culture from pre-soak liquor sample obtained from a different tannery whereas this sample formed a biofilm structure. The mixed culture of samples from the main soaking process was inhibited by the extracts at the inhibition percentages of 62.13–78.17 at the concentrations of 240- 30 µg/mL. Similar results were also obtained for the other sample (64.6–76.5%) from main soak liquor sample obtained from a different tannery. In conclusion, lichen extracts may have potential antibacterial and anti-biofilm properties against the mixed culture of bacteria from tank surface, pre-and main soak liquor samples and maybe alternatively utilized in the leather industry. Note de contenu : - Lichen samples - Extraction of lichen samples - Samples - Antibacterial assays - Anti-biofilm assays DOI : https://doi.org/10.34314/jalca.v115i10.4174 En ligne : https://drive.google.com/file/d/1bymqwwbC7z2LVax6C5nzF0dCA1ucYOYl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34611 [article]

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Antibacterial potency for mimosa, quebracho and essential oils of origanum species against acinetobacter pittii, klebsiella pneumoniae and bacillus cereus from diabetic foot patient / Didem Berber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 6 (06/2022)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 6 (06/2022) . - p. 232-240 Titre : Antibacterial potency for mimosa, quebracho and essential oils of origanum species against acinetobacter pittii, klebsiella pneumoniae and bacillus cereus from diabetic foot patient Type de document : texte imprimé Auteurs : Didem Berber, Auteur ; L. Inanc, Auteur ; Ipek Türkmenoglu, Auteur ; O. Toksöz, Auteur ; Nüzhet Cenk Sesal, Auteur Année de publication : 2022 Article en page(s) : p. 232-240 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Diabète Extraits de plantes Extraits de plantes:Extraits (pharmacie) Huile essentielle d'origan Mimosa et constituants Quebracho Le quebracho est un arbre à écorce ligneuse, mesurant 30 mètres de haut, à feuilles tannées et à fleurs tubulées blanches. Quebracho est l'un des noms communs, en espagnol, d'au moins trois espèces similaires d'arbres originaires du Gran Chaco, en Amérique latine : Schinopsis lorentzii (quebracho colorado santiagueño), de la famille des Anacardiaceae ; Schinopsis balansae (quebracho colorado chaqueño), de la même famille ; Aspidosperma quebracho-blanco (quebracho blanc), de la famille des Apocynaceae. Ces trois espèces sont riches en tanin et fournissent un bois très dur, particulièrement résistant. Leur nom provient de l'espagnol quiebrahacha, qui signifie brise-hache. Statistique Index. décimale : 660.62 Microbiologie industrielle Résumé : The diabetic patients may sometime suffer from foot lesions, foot ulcers and amputation that adversely affect their quality of life. In this respect, good footwear has a critical significance for diabetic foot patients. The aim of this study to evaluate the potential efficacy of mimosa, quebracho, and essential oils of Origanum onites, Origanum onites oleum, and Origanum minutiflorum, against Acinetobacter pittii, Bacillus cereus, and Klebsiella pneumoniae, which was isolated from diabetic foot patient. According to our results, the mimosa extracts were slightly more efficient when compared to quebracho extracts to control the bacterial growth of A. pittii (8.77±0.58-35.12±8.41% inhibition for three doses), and K. pneumoniae (21.40±0.48-47.04±0.51% inhibition) except B. cereus (71.1±0.31-23.51±1.66% inhibition). But these inhibition percentages remained at lower levels. On the other hand, essential oil samples of O. onites, O. onites oleum, and O. minutiflorum at tested doses have considerably high antibacterial effects against A. pittii, B. cereus, and K. pneumoniae. The tested essential oils almost completely inhibited B. cereus with percentages of inhibition ranging from 96.18±2.98-100±0.00. Also, the bacterial growth of K. pneumoniae and A. pittii was inhibited by 88.01±2.36 to 100±0.00% and 71.42±12.57 to 100±0.00%, respectively. Moreover, the essential oils of O. onites, O. onites oleum, and O. minutiflorum, had bactericidal activity against A. pittii, and K. pneumoniae but bacteriostatic activity against B. cereus. This potency for essential oil of Origanum species may be evaluated for diabetic footwear. More detailed technical studies are required for the application of Origanum species to leather footwear. Note de contenu : - MATERIALS AND METHODS : Bacterial strain and test materials - Antibacterial tests - Statistical analyses - RESULTS AND DISCUSSION : Antibacterial efficacy of mimosa extracts against tested bacteria - Antibacterial efficacy of quebracho extracts against tested bacteria - Antibacterial efficacy of essential oils of O. onites, O. onites oleum, and O. minutiflorum - Statistical analyses DOI : https://doi.org/10.34314/jalca.v117i6.4964 En ligne : https://drive.google.com/file/d/1tkUAsnRyp1nzpjK77BOJP0MsQbPbfBEg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37798 [article]

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Antibacterial properties of several lichen extracts against two moderately halophilic bacteria from salted sheepskins / Ipek Türkmenoglu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 4 (04/2022)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 4 (04/2022) . - p. 153-163 Titre : Antibacterial properties of several lichen extracts against two moderately halophilic bacteria from salted sheepskins Type de document : texte imprimé Auteurs : Ipek Türkmenoglu, Auteur ; O. Toksöz, Auteur ; Didem Berber, Auteur ; Pinar Caglayan, Auteur ; Meral Birbir, Auteur ; Nüzhet Cenk Sesal, Auteur Année de publication : 2022 Article en page(s) : p. 153-163 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Bactéries halophiles Cuirs et peaux de moutons Essais (technologie) Extraction (chimie) Extraits de plantes Lichens et constituants Statistique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : It is well known that possible undesirable defects in finished leathers can result from microbial activities on the salted raw hides/skins during storage. The traditionally used salt curing method can control bacterial activities on the raw stock, but it does not seem possible to completely eliminate microbial attacks. Moderately halophilic bacteria can cause serious damage to hides/skins. From this point of view, potential procedures such as applying new antibacterial agents in the leather industry should be considered. Since some lichen species have been indicated for their promising biological efficacies in the literature; most researchers have focused on their potencies in various fields including leather industry from ancient times. In this study, the bacterial growth of proteolytic and lipolytic Gram-negative moderately halophilic bacteria, Chromohalobacter canadensis (YN6) and Halomonas eurihalina (BL5), from salted sheepskin samples were tested with the extracts of Usnea sp., Plastismatia glauca, Ramalina farinacea, Evernia divaricata, Bryoria capillaris, Hypogymnia tubulosa, Pseudevernia furfuracea and Lobaria pulmonaria. Some of these lichen species were found to be successful to inhibit the bacterial growth of C. canadensis (YN6) and H. eurihalina (BL5). In conclusion, lichen extracts may be utilized in stacked raw hides/skins in tanneries or warehouses to control moderately halophilic bacteria which causes several defects on leather. Note de contenu : - Moderately halophilic test bacteria - Lichen samples - Extraction of lichen samples - Antibacterial tests - Statistical analysis DOI : https://doi.org/10.34314/jalca.v117i4.4898 En ligne : https://drive.google.com/file/d/1JpK270mPD-iuFdcBl9PUzESigAqLbYrc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37562 [article]

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Efficacy assessment of bactericide containing didecyldimethylammonium chloride on bacteria found in soak liquor at different exposure times / Didem Berber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 11 (11/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 11 (11/2010) . - p. 354-359 Titre : Efficacy assessment of bactericide containing didecyldimethylammonium chloride on bacteria found in soak liquor at different exposure times Type de document : texte imprimé Auteurs : Didem Berber, Auteur ; Meral Birbir, Auteur ; Husniye Hacioglu, Auteur Année de publication : 2010 Article en page(s) : p. 354-359 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ammoniums quaternaires Antibactériens Bactéries -- Identification Cuirs et peaux Tannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this study, the efficacy of the bactericide containing didecyldimethylammonium chloride (quaternary ammonium compound) on the bacteria found in the main soak liquor at tannery was examined at different exposure times of 10 min., 30 min., 60 min., 120 min., 180 min., 240 min., 300 min., 360 min., 420 min. and 480 min. The presence of proteolytic and lipolytic mesophilic bacterial populations in high numbers in the main soak liquors showed that the recommended concentration of the bactericide (0.4 g/l) was not effective to control bacterial populations. Based on these results, the recommended concentration of the bactericide in the main soaking process was doubled (0.8 g/l) and it was observed that this concentration was considerably effective in controlling the bacterial growth. In addition, the bacterial flora in the main soak liquor treated with this bactericide was examined. Enterobacter gergoviae, enterobacter sakazakii, enterobacter amnigenus biogrup I, enterobacter cloaceae, pseudomonas fluorescens, pseudomonas luteola, pseudomonas aeruginosa, pseudomonas putida, enterococcus avium, enterococcus faecium, lactococcus lactis ssp. lactis, aerococcus viridans, vibrio parahaemolyticus, kocuria varians, staphlococcus hominis, staphylococcus capitis, staphylococcus sciuri, staphylococcus xylosus, staphylococcus cohnii ssp. urealyticus, staphylococcus epidermidis, staphylococcus intermedius, staphylococcus haemolyticus, staphylococcus lugdunensis, staphylococcus cohnii ssp. cohnii, staphylococcus warneri and micrococcus spp. were isolated and identified from the main soak liquor after doubling the batericide concentration. As a conclusion, the recommended dose of commonly used bactericides should be tested periodically in main soaking process at tanneries to inactivate various bacterial populations found in soak liquors. En ligne : https://drive.google.com/file/d/1FQYkc971MhxeZK0Ec60b9k0rf40MVBHL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10236 [article]

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Efficacy of usnea sp. extracts in preventing biofilm formation by bacillus species isolated from soaking liquor samples / Didem Berber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 6 (06/2020)  

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Examination of bacterial and archael populations in salt, salted and soaked hide and soak liquors via fluorescent in situ hybridization / Didem Berber in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 6 (11-12/2010)  

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Examination of bacterial populations in salt, salted hides, soaked hides and soak liquors / Didem Berber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 10 (10/2010)  

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Identification of slightly halophilic bacteria from salted sheepskin samples and investigation of their biotechnological importance / Dilek Yalcin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 1 (01-02/2024)  

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Minimal bactericidal concentration for a quaternary ammonium compound used in soak liquors / Canan Veyselova in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 4 (07-08/2013)  

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Quarternary ammonium compound as bactericide in hide brine curing and presoaking processes / C. Veyselova in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 10 (10/2012)

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