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    Öğe
    Assessment of antimicrobial activity of natural leathers treated with pseudevernia furfuracea (L.) Zopf extracts
    (2013) Türkan, Mehmet Fatih; Aslan, Ahmet; Yapici, Ali Nail; Meriçli Yapici, Binnur; Bilgi, Sadi Turgut
    In the present study, antimicrobial activity of raw skin and chrome-tanned leather samples treated with acetone and chloroform extracts of Pseudevernia furfuracea (L.) Zopf were tested against Bacillus subtilis (ATTC 6633), Bacillus cereus (CCM 99), Staphylococcus aureus (ATCC 6538-P), Escherichia coli (ATCC 11228), Enterococcus faecalis (ATCC 29212), Klebsiella pneumoniae (CCM 2318), Pseudomonas aeruginosa (ATCC 27853), Aspergillus niger, Aspergillus fumigatus, Aspergillus candidus, Aspergillus flavus, Penicillium jensenii, Geotrichum candidum and Candida albicans by the disc diffusion method. The study showed that acetone and chloroform extracts of Pseudevernia furfuracea (L.) Zopf had antimicrobial activity on raw skin and chrome-tanned leather. The inhibition zones of both extracts for the bacteria and fungi tested were found to vary between 11.0 mm to 31.0 mm in raw skins, but between 11.2 mm and 29.0 mm in chrome-tanned leathers.
  • [ X ]
    Öğe
    ASSESSMENT OF ANTIMICROBIAL ACTIVITY OF NATURAL LEATHERS TREATED WITH Pseudevernia furfuracea (L.) Zopf EXTRACTS
    (Ege Univ, 2013) Turkan, Mehmet Fatih; Aslan, Ahmet; Yapici, Ali Nail; Yapici, Binnur Mericli; Bilgi, Sadi Turgut
    In the present study, antimicrobial activity of raw skin and chrome-tanned leather samples treated with acetone and chloroform extracts of Pseudevernia furfuracea (L.) Zopf were tested against Bacillus subtilis (ATTC 6633), Bacillus cereus (CCM 99), Staphylococcus aureus (ATCC 6538-P), Escherichia coli (ATCC 11228), Enterococcus faecalis (ATCC 29212), Klebsiella pneumoniae (CCM 2318), Pseudomonas aeruginosa (ATCC 27853), Aspergillus niger, Aspergillus fumigatus, Aspergillus candidus, Aspergillus flavus, Penicillium jensenii, Geotrichum candidum and Candida albicans by the disc diffusion method. The study showed that acetone and chloroform extracts of Pseudevernia furfuracea (L.) Zopf had antimicrobial activity on raw skin and chrome-tanned leather. The inhibition zones of both extracts for the bacteria and fungi tested were found to vary between 11.0 mm to 31.0 mm in raw skins, but between 11.2 mm and 29.0 mm in chrome-tanned leathers.
  • [ X ]
    Öğe
    Assessment of antimicrobial activity of natural leathers treated wıth pseudevernia furfuracea (L.) Zopf extracts
    (2013) Türkan, Mehmet Fatih; Aslan, Ahmet; Yapıcı, Ali Nail; Yapıcı, Binnur Meriçli; Bilgi, Sadi Turgut
    Bu çalışmada, Pseudevernia furfuracea (L.) Zopfın aseton ve kloroform ekstraktları ile muamele edilmiş ham deri ve krom tabaklanmış deri numunelerinin antimikrobiyal aktivitesi disk difüzyon yöntemiyle, Bacillus subtilis (ATTC 6633), Bacillus cereus (CCM 99), Staphylococcus aureus (ATCC 6538-P), Escherichia coli (ATCC 11228), Enterococcus faecalis (ATCC 29212), Klebsiella pneumoniae (CCM 2318), Pseudomonas aeruginosa (ATCC 27853), Aspergillus niger, Aspergillus fumigatus, Aspergillus candidus, Aspergillus flavus, Penicillium jensenii, Geotrichum candidum ve Candida albicansa karşı test edilmiştir. Çalışma sonucunda, Pseudevernia furfuracea (L.) Zopfun aseton ve kloroform ekstraktlarının antimikrobiyal aktivitesi, ham deri ve krom ile tabaklanmış derilerde gözlenmiştir. Her iki ekstraktın inhibisyon zonları ham derilerde, test edilen bakteri ve funguslar için 11.0 mm ile 31.0 mm arasında, kromlu derilerde ise 11.2 mm ile 29.0 mm arasında değiştiği bulunmuştur.
  • Küçük Resim
    Öğe
    Synthesis and Characterization of a New Cryogel Matrix for Covalent Immobilization of Catalase
    (MDPI, 2022) Altunbaş, Canan; Aslan, Ahmet; Kusat, Kevser; Şahiner, Mehtap; Akgöl, Sinan; Şahiner, Nurettin
    The advantages of cryogels for enzyme immobilization applications include their mechanical and chemical robustness, ease of production, superior porosity, and low cost. Currently, many researchers are exploring porous material-based systems for enzyme immobilization that are more efficient and economically viable. Here, poly(2-Hydroxyethyl methacrylate-co-allyl glycidyl ether) (p(HEMA-co-AGE)) cryogel matrices were synthesized via the free radical cryopolymerization method to be employed as the support material. For the immobilization of the catalase enzyme onto the p(HEMA-co-AGE) cryogel matrix (catalase@p(HEMA-co-AGE), the best possible reaction conditions were determined by altering parameters such as pH, catalase initial concentration, and flow rate. The maximum catalase immobilization amount onto the p(HEMA-co-AGE) cryogel was found to be 48 mg/g cryogel. To determine the advantages of the cryogel matrix, e.g., the stability and reusability of the cryogel matrix, the adsorption-desorption cycles for the catalase enzyme were repeated five times using the same cryogel matrix. At the end of the reusability tests, it was found that the cryogel was very stable and maintained its adsorption capacity with the recovery ratio of 93.8 +/- 1.2%. Therefore, the p(HEMA-co-AGE) cryogel matrix affords repeated useability, e.g., up to five times, without decreasing its catalase binding capacities significantly and has promising potential for many industrial applications. Cryogels offer clear distinctive advantages over common materials, e.g., micro/nano particles, hydrogels, films, and composites for these applications. At present, many researchers are working on the design of more effective and economically feasible, porous material-based systems for enzyme immobilization