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    Comparison of biochemical, antimicrobial and cytotoxic activities of different propolis samples from Malatya and Bilecik
    (Revista de Chimie SRL, 2020) Keskin, Merve; Karlıdağ, Semiramis; Yılmaz, Özgür; Tatlıcı, Eray; Karabulut, Ercan; Apohan, Elif; Yeşilada, Özfer
    Propolis is a resinous natural mixtures collected and produced by honey bees. It is rich in essential oils and phenolic components so it has high levels of antioxidant, antimicrobial, anti-inflammatory and anti-tumoral activity. In this study the biochemical activity of propolis extracts were determined. The antimicrobial activity and cytotoxic activity of the extracts of the nine different propolis samples were invastigated. Their antimicrobial activities were tested by microdillution metod and define as minimum inhibitory concentration (MIC). Chemical composition of extracts was determined by using GC-MS equipment. Total phenolic content and antioxidant activity of the extracts was measured. Antimicrobial and cytotoxic activity of the extracts was carried out as well. All of the extracts showed antimicrobial activity on bacteria and yeasts used. Extracts had generally lower MIC values on yeasts. Therefore, yeasts were detected as more susceptible against the propolis extracts than the bacteria. Cytotoxic activity of extract were determined aganist A549 and Beas2B cell lines and IC50 values were calculated. Ma-Arapgir had the highest cytotoxic activity on A549 and Beas2B. They were determined as 6.72 and 26.44 mg/mL, respectively. It could be concluded that propolis extracts have antimicrobial and cytotoxic activity thus, propolis could be used in the treatment of cancer. © 2020 SYSCOM 18 S.R.L.. All rights reserved.
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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
    (2022) Yılmaz, Ülkü; Apohan, Elif; Küçükbay, Hasan; Yılmaz, Özgür; Tatlıcı, Eray; Yeşilada, Özfer
    A series of 5(6)-substituted benzimidazole ligand-zinc(II) and cobalt(II) complexes were synthesized and characterized by 1H, 13C 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.