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    Preparation of 10-undecenoic acid based polyurethane/PCL fibers by electrospinning method and investigation of their antifungal properties
    (Springer, 2022) Acari, Idil Karaca; Boran, Filiz; Kolak, Seda; Tatlici, Eray; Yesilada, Ozfer; Koytepe, Suleyman; Ates, Burhan
    Nowadays, in the treatment of such fungal infections, antifungal drugs in various forms are one of the most preferred methods. These medications can be in the form of creams and lotions, shampoos, pills, suppositories, powders, or sprays. The dose of the drugs is adjusted according to the type and growth area of the fungus, the severity of the symptoms, and the medical history of the patients. Dressing materials with antifungal properties are an alternative treatment method used for the treatment of fungal skin infections. These covers not only treat fungal infections but also prevent their spread. Within the scope of this study, polyurethane-based wound dressing materials (PU-UDA/PCL) with antifungal properties were developed. Electrospining method was used to produce these dressing materials and the surface area of the wound dressing material was increased, thereby increasing the effect of antifungal property. Polypropylene glycol, glycerol, and catechin as polyol were preferred in polyurethane (PU) synthesis. These structures were polymerized with isophorone diisocyanate and modified with 10-undecenoic acid. Obtained 10-undecenoic acid modified polyurethane (PU-UDA) structures were transformed into wound dressing structure with polycaprolactone (PCL) by electrospinning method. Structural, morphological, and thermal properties of the wound dressing materials were analyzed with different instrumental analysis methods. The antifungal activities of PU-UDA/PCL were tested. Antifungal tests were performed on C. albicans and C. tropicalis. Therefore, PU-UDA/PCL series could be used as an efficient antifungal agent. Finally, it was determined that the obtained 10-undecenoic acid-based polyurethane fibers have a suitable structure and feature for the treatment of many fungal infections.
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    Synthesis a group of 5(6)-substituted benzimidazole Zn(II) and Co(II) complexes and investigation their cytotoxic and antimicrobial activities
    (Wiley, 2022) Yilmaz, Ulku; Apohan, Elif; Kucukbay, Hasan; Yilmaz, Ozgur; Tatlici, Eray; Yesilada, Ozfer
    A series of 5(6)-substituted benzimidazole ligand-zinc(II) and cobalt(II) complexes were synthesized and characterized by H-1, C-13 NMR, IR, CHN analysis techniques. In vitro, anticancer and antimicrobial activities of ligand and complexes were evaluated. The cytotoxic activities of compounds were investigated against the human lung adenocarcinoma (A549) cell lines and healthy human lung bronchial epithelium (BEAS2B) cells. Compounds 1, 6, and 8 were observed to exhibit higher cytotoxic activity than the others at the 72nd hour. Also, the compounds showed varying degrees of antimicrobial activity against the microorganisms used. Compounds 1, 5, and 8 were most effective against standard strains Pseudomonas aeruginosa ATCC 27853 and Staphylococcus aureus ATCC 29213. As for the antifungal activity, compounds 1, 5, 6, and 8 showed high antifungal activity against the yeast type fungi Candida albicans ATCC 90028 and Candida tropicalis.