Browsing by Author "Arici, Omruye Ozok"

Now showing 1 - 2 of 2

Bimetallic Ruthenium-Cobalt Catalyst Supported on Carbon Nanotubes: Synthesis, Characterization, and Application in Electrochemical Sensing of Isoleucine
(Wiley, 2025) Arici, Omruye Ozok; Caglar, Aykut; Najri, Bassam A.; Aktas, Nahit; Kivrak, Arif; Kivrak, Hilal
In this work, a bimetallic Ru-Co catalyst based on carbon nanotubes (Ru-Co/CNT) with a Ru to Co ratio of 95:5 is developed. The catalyst, featuring a total metal loading of 3% on the CNTs, is synthesized using the NaBH4 reduction method. Several analytical analyses are used to detect the properties of the Ru-Co/CNT catalyst. X-ray diffraction (XRD) provides information on crystal structures of the catalysts, high-resolution transmission electron microscopy (HR-TEM) reveals particle size and distribution, inductively coupled plasma mass spectrometry (ICP-MS) measures the elemental composition, and X-ray photoelectron spectroscopy (XPS) use to investigate the chemical oxidation states. In addition, thermal techniques including temperature-programmed reduction (TPR), temperature-programmed oxidation (TPO), and temperature-programmed desorption (TPD) are used to recognize the active sites on the catalyst's surface and the acidity. Then, the Ru-Co/CNT catalyst is applied as a sensor for isoleucine amino acid for the first time. It shows high performance with these parameters, sensitivity (0.002 mA cm-2 mm), LOD - limit of detection (0.04 mu m), and LOQ - limit of quantification (0.12 mu m). Moreover, the interferences of common serum blood including (D-glucose, uric acid, ascorbic acid, and L-tryptophan) are studied. The findings indicated that the sensor is applicable to work in complex biological systems.
Synthesis, in Silico Evaluation of ADME/T Properties, as Well as Antioxidant, Antibacterial, Anti-Inflammatory, and Anticancer Activities of Methyl(2-(phenylethynyl)phenyl)sulfane
(Wiley-VCH Verlag GmbH, 2025) Mahaleh, Shayesteh Poorhosein Ghazi; Arici, Omruye Ozok; Kivrak, Arif; Otur, Cigdem; Kurt-Kizildogan, Aslihan; Mutlu, Dogukan; Arslan, Sevki
Sulfur-containing compounds exhibit diverse biological activities, including anti-inflammatory, anticancer, antioxidant, antibacterial, and antidiabetic properties. In this study, for the first time, the biological properties of methyl(2-(phenylethynyl)phenyl)sulfane (MPPS), including its antioxidant, antimicrobial, cytotoxic, anti-inflammatory, and anticancer activities, were evaluated. According to the results, MPPS did not show any remarkable antioxidant activity. However, MPPS demonstrated modest antimicrobial activity against S. aureus ATCC 25923 (MIC value: 512 mu g/mL) and B. subtilis ATCC 6633 as well as other indicator strains (MIC value: 256 mu g/mL). Additionally, the MBC values of MPPS were found to be 512 mu g/mL for the two gram-negative strains, E. coli ATCC 25922 and P. aeruginosa ATCC 27853. Furthermore, MPPS showed a dose-dependent cytotoxic effect in all tested cell lines. The EC50 values of MPPS were determined as 202.68 mu M for PANC-1, 226.63 mu M for LNCaP, and 166.27 mu M for Ishikawa cells, respectively. MPPS significantly inhibited colony formation and induced apoptosis in the cancer cell line. Moreover, MPPS exhibited notable anti-inflammatory activity in RAW264.7 cells. These findings suggest that MPPS has potential for cancer treatment and as an anti-inflammatory and antimicrobial agent. However, further studies are required to confirm these effects.