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Applying electric current to inactivate gram-negative bacteria isolated from salt-packed-cured hides / Yasar Birbir in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 1 (01-02/2013)
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Titre : Applying electric current to inactivate gram-negative bacteria isolated from salt-packed-cured hides Type de document : texte imprimé Auteurs : Yasar Birbir, Auteur ; Seda Molla, Auteur ; Meral Birbir, Auteur Année de publication : 2013 Article en page(s) : p. 5-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens
Bactéries à gram négatif
Courants alternatifs
Courants électriquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Proteolytic and lipolytic bacteria on salt-pack cured hides may reduce leather quality by causing grain damage, looseness, chrome soaps, fatty spues, uneven dyeing, weakness and holes in leathers. To prevent bacterial damage on salt-pack cured hides during storage and other processes, the antibacterial effects of 1.5A alternating electric current on Enterobacter cloacae, Pseudomonas luteola and Vibrio fluvialis, as well as mixed population of these micro-organisms isolated from the hides, were separately examined in brine solution containing 25% NaCl. Fifteen minutes exposure to 1.5A alternating current inactivated all of the test bacteria in the brine solution. Additionally, 1.5A alternating current for 15 minutes and followed by 1.5A direct current for 1 minute inactivated the mixed population of these bacteria in the brine solution. The maximum temperature rise was 6°C. This research proved that inactivation of harmful gram-negative bacteria via 1.5A alternating electric current followed by 1.5A direct electric current, may be an effective method of bacterial inactivation with bacteria which are difficult to inactivate with chemical antibacterial agents because of their formidable permeability barrier. In conclusion, alternating electric current treatment applied together with direct electric current is a very effective method to inactivate a mixed culture of gram-negative bacterial population in the brine curing process. Note de contenu : - Test bacteria - Determination of protease activity
- Determination of lipase activity
- Inactivation of test strainsEn ligne : https://drive.google.com/file/d/1b0lZESKcKXsSYDZTvrdRE14g7tl3mMW3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17447
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 1 (01-02/2013) . - p. 5-10[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14631 - Périodique Bibliothèque principale Documentaires Disponible Elimination of antibiotic resistant enterobacteriaceae via combined application of direct electric current, alternating electric current and 2-thiocyanomethylthio benzothiazole / Meral Birbir in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 2 (03-04/2019)
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Titre : Elimination of antibiotic resistant enterobacteriaceae via combined application of direct electric current, alternating electric current and 2-thiocyanomethylthio benzothiazole Type de document : texte imprimé Auteurs : Meral Birbir, Auteur ; Eda Yazici, Auteur ; Pinar Caglayan, Auteur ; Yasar Birbir, Auteur ; Richard Alan Goebel, Auteur Année de publication : 2019 Article en page(s) : p. 85-90 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens
Bain de trempe
Courants électriques
Cuirs et peaux -- ConservationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Multidrug-resistant Enterobacteriaceae originating from animals' intestinal tracts may be found on salted and soaked hides/skins. The presence of proteolytic, lipolytic, multidrug-resistant Enterobacteriaceae on hides/skins and the resulting destructive processes results in economic lusses to the leather industry and creates health hazards for workers. To minimise this destructive bacterial presence, the bactericidal effect of combined application of direct or alternating electric current and an antibacterial agent against multidrug-resistant Enterobacteriaceae were examined in this study.
Multidrug-resistant Citrobacter freundii, Citrobacter koseri, Enterobacter cloacae, Serratia rubidaea, Serratia marcescens, Serratia plymuthica, Morganella morganii, Proteus mirabilis, Providencia rettgeri, isolated from soaked hides/skins, were used in the present study. Among the test isolates, Proteus mirabilis, Serratia marcescens, Serratia plymuthica, Serratia rubidaeai were protease and lipase producer strains. Ail test isolates were resistant to critically important antimicrobials which are used in both human and veterinary medicine. Bacterial effect of combined application of 508mA/cm2 direct electric current, 454mA/cm2 alternating electric current and an antibacterial agent (2- (thiocyanomethylthio) benzothiazole) against the mixed culture of these micro-organisms were investigated in nutrient broth containing 3% NaCI. After application of six cycles of the combine electric current treatment against the mixed culture of multidrug-resistant Enterobacteriaceae treated with (2-(thiocyanomethylthio) benzothiazole) was completely killed within five hours. The Log10 reduction of the mixed culture at the end of the experiment was T55.
In conclusion, the combined application of direct electric current, alternating electric current and antibacterial agent may be used in soak liquors to eliminate proteolytic, lipolytic, multidrug-resistant Enterobacteriaceae in the leather industry.Note de contenu : - Test micro-organisms
- Electric current treatments and antibacterial application on the mixed culture of test micro-organismsEn ligne : https://drive.google.com/file/d/1sh0F3IoYOBxx_GM2r8RgQF861EqYymS3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32305
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 2 (03-04/2019) . - p. 85-90[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20855 - Périodique Bibliothèque principale Documentaires Disponible Investigation of moderately halophilic bacteria causing deterioration of the salted sheep and goat skins and their extermination via electric current applications / Pinar Caglayan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 2 (02/2018)
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Titre : Investigation of moderately halophilic bacteria causing deterioration of the salted sheep and goat skins and their extermination via electric current applications Type de document : texte imprimé Auteurs : Pinar Caglayan, Auteur ; Meral Birbir, Auteur ; Cristina Sánchez-Porro ; Antonio Ventosa ; Yasar Birbir Année de publication : 2018 Article en page(s) : p. 41-52 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bactéries
Courants alternatifs
Courants électriques
Cuirs et peaux -- Analyse
Cuirs et peaux -- Conservation
Cuirs et peaux de chèvres
Cuirs et peaux de moutonsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Determination of moderately halophilic bacterial counts on the salted skins and examination of utilization of amino acid and carbon sources by skin isolates offer important information about biodegradation of salted skins. Hence, total counts of moderately halophilic bacteria, total counts of proteolytic and lipolytic moderately halophilic bacteria found on the salted sheep and goat skins belonging to different countries were examined in this study. One hundred-thirty seven moderately halophilic bacterial species closely related to species of genera Alkalibacillus, Bacillus, Chromohalobacter, Gracilibacillus, Halomonas, Idiomarina, Marinococcus, Oceanobacillus, Planococcus, Salimicrobium, Salinicoccus, Staphylococcus and Salinivibrio were used to detect utilization of different amino acids and carbon sources which are related to biodegradation of skins. The values of pH, moisture contents, ash contents and salt saturations of these skins were also investigated to understand the correlation between these parameters and moderately halophilic bacterial activities. All salted skin samples contained moderately halophilic bacteria, proteolytic and lipolytic moderately halophilic bacteria in high numbers. Each of 137 test isolates, obtained from the salted sheep and goat skins, used different amino acids found in the skin structure. While 100% of both sheep and goat skin isolates utilized L-arginine, 86%, 66%, 85%, 64% and 66% of the isolates respectively utilized L-glycine, L-alanine, L-tyrosine, L-proline and L-hydroxyproline amino acids. Ninety-three percent of the isolates used different carbon sources such as dulcitol (13%), D-sorbitol (29%), L-rhamnose (19%), ribose (52%), salicin (40%), myo-inositol (27%), xylitol (21%), benzoate (18%), propionate (34%), D-melezitose (31%), butanol (20%), propanol (23%), methanol (23%), formate (23%) and tartrate (12%). While pH values, moisture contents, ash contents and salt saturations of the sheep skins ranged from 6.53 to 8.01, 32 to 68%, 12 to 30% and 58 to 100%, respectively, the pH values, moisture contents, ash contents and salt saturations of the goat skins were between 6.65-8.06, 34-70%, 11-32% and 64-100%, respectively. The values of all skin samples were found to be suitable for the growth and catabolic activities of these bacteria. To prevent the growth and activities of moderately halophilic isolates causing skin deterioration, the annihilation effects of 0.5, 1.0, 1.5 and 2.0 A direct and alternating electric current treatments on the mixed culture of moderately halophilic isolates (Chromohalobacter israelensis, Chromohalobacter canadensis, Halomonas halodenitrificans, Staphylococcus nepalensis and Halomonas halmophila) were also separately investigated in the present study. Both 0.5, 1.0, 1.5, 2.0 A direct and alternating electric current applications used in this study completely annihilated the mixed culture of moderately halophilic spoilage microorganisms. As a conclusion, we suggest using lowlevel direct or alternating electric current treatment to eradicate harmful moderately halophilic bacteria in salt which will be used in brine curing of hides and skins in the leather industry. Note de contenu : - EXPERIMENTAL : Skin Samples - Determination of total of moderately halophilic bacteria on the skin samples - Determination of total counts of proteolytic and lipolytic moderately halophilic bacteria on the skins - Utilization of different amino acids and different carbon sources - Determination of pH values of the salted skins - Determination of moisture content, ash content and salt saturation of the salted skins - Application of alternating and direct electric currents on the mixed culture
- RESULTS AND DISCUSSION : Moderately halophilic bacteria, proteolytic and lipolytic bacteria on salted sheep and goat skin samples - Determination of pH value, moisture content, ash content and salt saturation of the salted skins - Utilization of different amino acids and different carbon sources - Application of alternating and direct electric currents on the mixed culture of moderately halophilic spoilage bacteriaEn ligne : https://drive.google.com/file/d/13FYlhwuWlVz9ABkOdZFqz5LbN0xD_nh_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29950
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 2 (02/2018) . - p. 41-52[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19539 - Périodique Bibliothèque principale Documentaires Disponible Principe d'électricité / James B. Owens / Paris : Editions Gamma (1967)
Titre : Principe d'électricité Titre original : Fundamentals of electricity Type de document : texte imprimé Auteurs : James B. Owens, Auteur ; Paul E. Sanborn, Auteur ; Jacques Matalon, Traducteur Editeur : Paris : Editions Gamma Année de publication : 1967 Collection : Cours d'instruction programmée Tutortext Importance : p. 113-242 Présentation : ill. Format : 22 cm Note générale : Index Langues : Français (fre) Langues originales : Américain (ame) Catégories : Courants électriques
ElectrostatiqueIndex. décimale : 537 Electricité et électronique : Classer ici l'électromagnétisme Résumé : L'électrostatique - Le courant électrique. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2270 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 1114 537 OWE Monographie Bibliothèque principale Documentaires Disponible Synergistic effect of direct and alternating electric current treatments and bronopol to inactivate bacteria found in hide soak liquors / Yasar Birbir in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 10 (10/2013)
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Titre : Synergistic effect of direct and alternating electric current treatments and bronopol to inactivate bacteria found in hide soak liquors Type de document : texte imprimé Auteurs : Yasar Birbir, Auteur ; N. Dolek, Auteur ; Meral Birbir, Auteur ; Pinar Caglayan, Auteur Année de publication : 2013 Article en page(s) : p. 373-385 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Bain de trempe
BronopolLe bronopol (2-bromo-2-nitropropane-1,3-diol) est un composé organique utilisé comme un antimicrobien. Il s'agit d'un solide blanc bien que les échantillons commerciaux apparaissent jaunes. Le bronopol a été inventé par The Boots Company PLC (en) au début des années 1960. En raison de sa faible toxicité pour les mammifères et une forte activité contre les bactéries, le bronopol est devenu populaire comme conservateur dans de nombreux produits de consommation tels que les shampooings et produits cosmétiques. Il a ensuite été adopté comme agent antimicrobien dans d'autres environnements industriels comme les usines de papier, l'exploration pétrolière et les installations de production, ainsi que de refroidissement des usines de désinfection de l'eau. Il est utilisé à des concentrations de 0,0025 % (25 parties par million).
Production : Le bronopol est produit par la bromation du di (hydroxyméthyl) nitrométhane, qui est dérivé du nitrométhane.
Applications : Le bronopol est utilisé dans les produits de consommation comme un agent de conservation efficace, ainsi que dans une grande variété d'applications industrielles.
Courants électriques
Cuirs et peaux -- ConservationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : It is well known that bacteria on hides and in the hide-soak liquors do damage that compromises leather quality. These harmful bacteria are resistant to the antibacterial agents used in the hide industry. In this research the synergistic effect of a combined electric current treatment using both 1.5 A direct and 2.0 A alternating electric currents, followed by 1 g/L of bronopol treatment on mixed culture of Gram positive and Gram negative hide bacteria was examined in a liquid medium containing 2% NaCl and organic substances. Enterobacter cloacae, Vibrio fluvialis, Pseudomonas luteola, Staphylococcus cohnii, Enterococcus faecium and Bacillus pumilus were used as test isolates. Six different experiments were carried out on the mixed culture of test bacteria to determine the efficiency of the synergistic effect of a combined electric current treatment. Bacterial cell counts were reduced to low level in a short period using the electric treatment. More than 2 log reduction factor of the mix culture was observed within 12 min after the electric current treatment, and the damaged bacteria were killed easily by bronopol in five hours. DC and AC electric currents in combination with antimicrobial agents may be used to more efficiently exterminate the bacteria found in the hide-soak liquors. Note de contenu : - Test bacteria
- The antibacterial agent
- Preparation of the mixed culture
- The electrolysis cell system
- Six different experiments were carried out in this studyEn ligne : https://drive.google.com/file/d/14nPzGkyKu1t4U8vfiZSylwn51uk9NEep/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19460
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 10 (10/2013) . - p. 373-385[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15578 - Périodique Bibliothèque principale Documentaires Disponible The effects of alternating and direct electric currents on moderately halohilic bacteria in leather industry / Pinar Caglayan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 6 (11-12/2016)
PermalinkTreatment using both direct and alternating electric currents on hide Bacteria in brine curing and pre-soaking liquors / Yasar Birbir in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 2 (03-04/2014)
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