In the current study, the oils obtained from the nuts of Corylus avellana L. (hazelnut), Arachis hypogea L. (peanut, groundnut), Pinus pinea L. (umbrella nut), and Juglans regia L. (walnut) were tested for their antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and antimicrobial activity against the standard and isolated strains of Escherichia coli, Pseudomonas aeruginosa. | Turk J Biol 35 (2011) 251-258 © TÜBİTAK doi: Evaluation of antibacterial, antifungal, antiviral, and antioxidant potentials of some edible oils and their fatty acid profiles İlkay ORHAN1,*, Berrin ÖZÇELİK2, Bilge ŞENER1 1 Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara - TURKEY 2Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Gazi University, 06330 Ankara - TURKEY Received: Abstract: In the current study, the oils obtained from the nuts of Corylus avellana L. (hazelnut), Arachis hypogea L. (peanut, groundnut), Pinus pinea L. (umbrella nut), and Juglans regia L. (walnut) were tested for their antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and antimicrobial activity against the standard and isolated strains of Escherichia coli, Pseudomonas aeruginosa, Proteus mirabilis, Klebsiella pneumoniae, Acinetobacter baumannii, Staphylococcus aureus, and Enterococcus faecalis as well as the fungi Candida albicans and C. parapsilosis by microdilution method, in which inhibition was expressed as minimum inhibition concentrations (MICs). Moreover, antiviral activity of the oils was determined using Herpes simplex (HSV) and Parainfluenza (PI-3). Their fatty acid analyses were performed by GC-MS technique. While the hazelnut and walnut oils showed the best antioxidant activity at 100 mg mL-1 ( and , respectively), the walnut oil had the most potent anti-PI-3 effect (16- < μg mL-1). The oils displayed -1 inhibitory potentials towards the isolated strains of E. coli, S. aureus, and E. faecalis at 4, 8, and 8 μg mL concentrations, respectively. Key words: Oil, antibacterial, antifungal, antiviral, antioxidant, fatty acid Bazı yenilebilen yağların antibakteriyel, antifungal, antiviral ve antioksidan potansiyellerinin değerlendirilmesi ve yağ asitleri profilleri Özet: Bu çalışmada, Corylus avellana L. (fındık), Arachis hypogea L. (yerfıstığı), Pinus pinea L. .
