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Öğe Antibacterial and Antifungal Activity of Heracleum Sphondylium Subsp Artvinense(Academic Journals, 2006) Ergene, A.; Güler, P.; Tan, Stewart; Mirici, Semra; Hamzaoğlu, Ergin; Duran, AhmetEthanol and aqueous extract of Heracleum sphondylium subsp. artvinense was investigated for their antimicrobial activities against eight bacterial species (Enterococcus feacalis, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Listeria monocytogenes, Shigella, Streptococcus pyogenes, and Corynobacterium diphtheria) and two yeast (Candida albicans and C. krusei). Both ethanol and aqueous extract of H. sphondylium subsp. artvinense showed antimicrobial activity against the gram-positive bacterium (S. aureus).Öğe Gas Chromatographic-mass Spectrometric Analysis of Volatiles Obtained by Four Different Techniques From Salvia Rosifolia Sm., and Evaluation for Biological Activity(Elsevier, 2010) Özek, Gülmira; Demirci, Fatih; Özek, Temel; Tabanca, Nurhayat; Wedge, David E.; Khan, Shabana I.; Başer, Kemal Hüsnü Can; Duran, Ahmet; Hamzaoğlu, ErginFour different isolation techniques, conventional hydrodistillation (HD), microwave-assisted hydrodistillation (MWHD), microdistillation (MD) and micro-steam distillation-solid-phase microextraction (MSD-SPME), have been used to analyze the volatile constituents from the aerial parts of Salvia rosifolia Sm. by gas chromatography and gas chromatography coupled to mass spectrometry. HD and MWHD techniques produced quantitatively (yield, 0.39% and 0.40%) and qualitatively (aromatic profile) similar essential oils. alpha-Pinene (15.7-34.8%), 1,8-cineole (16.6-25.1%), beta-pinene (6.7-13.5%), beta-caryophyllene (1.4-5.0%) and caryophyllene oxide (1.4-4.4%) were identified as major constituents of this Turkish endemic species. Besides, the hydrodistilled oil of S. rosifolia was evaluated for antibacterial, antifungal, anticancer, antioxidant and cytotoxic activities. The hydrodistilled oil of S. rosifolia showed antibacterial activity against Methicillin-resistant Staphylococcus aureus (MRSA) with a MIC value of 125 mu g/mL Other human pathogenic microorganisms (Escherichia coli, Pseudomonas aeruginosa, Enterobacter aerogenes, Salmonella typhimurium, Staphylococcus epidermidis, Candida albicans) were also inhibited within a moderate range (MIC = 125-1000 mu g/mL). Antifungal activity of the oil was also observed against the strawberry anthracnose-causing fungal plant pathogens Colletotrichum acutatum, C. fragariae and C. gloeosporioides. No cytotoxicity was observed for S. rosifolia oil up to 25 mg/mL against malignant melanoma, epidermal, ductal and ovary carcinoma.Öğe A New Genus Record for the Flora of Turkey: Tetradiclis Stev. ex M. Bieb. (Zygophyllaceae)(2005) Hamzaoğlu, Ergin; Duran, Ahmet; Akhani, HosseinKırıkkale'den (Orta Anadolu) toplanan Tetradiclis tenella (Ehrenb.) Litw. (Zygophyllaceae) Türkiye florası için yeni bir kayıttır. Türün betimi, fitocoğrafik önemi, yayılış haritası ve çizimi verilmiştir.Öğe Salvia Anatolica (Lamiaceae), a New Species From East Anatolia, Turkey(2005) Hamzaoğlu, Ergin; Duran, Ahmet; Pınar, Nur MünevverSalvia anatolica Hamzaoglu & A. Duran sp. nova (Lamiaceae) is described and illustrated from East Anatolia, Turkey. It is closely related to S. bracteata, an endemic also confined to East Anatolia. Diagnostic morphological characters of S. anatolica from closely similar taxa are discussed. The pollen characteristics of S. anatolica and S. bracteata are presented in photographs.
