Browsing by Author "Ozturk, A."

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Evaluation of Essential Oil and Methanol Extracts of Thymus Kotschyanus for Chemical Compounds and Antibacterial Activity
(Chemical Publishing Co., 2006) Ozturk, S.; Ozturk, A.
The essential oils obtained from the aerial parts of Thymus kotschyanus were analyzed for chemical compounds by using GC and GC-MS. In addition, following the methanol extraction of aerial parts of Thymus kotschyanus, soluble fraction was tested for its antibacterial activity by using disc diffusion assay. Twenty-three components accounting for 98.34% of oil were identified. The main compounds were thymol (40.39%), carvacrol (28.15%), p-cymene (10.76%) and γ-terpinene (8.13%). The antibacterial activity results showed that methanol extract of Thymus kotschyanus had a great potential of antibacterial activity against 38 of 52 bacteria species, in particular, Arthrobacter atrocyaneus, Bacillus cereus, Bacillus flexus, Bacillus lentimorbis, Brevibacillus brevis, Erwinia chrysanthemi, Kocuria rosea, Micrococcus lylae, Paenibacillus macerans, Pantoea agglomerans, Pseudomonas syringae syringae, Staphylococcus cohnii cohnii, Xanthomonas arboricola carylina and methanol extract inhibited growth of these bacteria at the concentration of 15.60-500 μg/mL. The results suggest that Thymus kotschyanus represents an inexpensive source of natural mixtures of antibacterial compounds that exhibit potentials for use in food systems to prevent the growth of food-borne bacteria and extends the shelf life of the processed food.
Inhibition of Growth of Some Food Borne Bacteria by Falcaria Vulgaris Extract
(Chemical Publishing Co., 2006) Ozturk, S.; Ozturk, A.
Aerial parts of Falcaria vulgaris were successively extracted with methanol using a Soxhlet extractor, then the crude extract was screened for antibacterial activities. Extracts of Falcaria vulgaris were tested for their antibacterial activity in agar disk diffusion assays, whereas the minimum inhibitory concentrations (MIC) of single compounds were determined by the microbroth dilution method. Significant antibacterial activities were found against various strains, in particular Acidovorax facilis. Bacillus cereus, Bacillus dipsauri, Bacillus lentimorbus, Bacillus spp., Bacillus subtilis, Brevibacillus agri, Brevibacillus brevis, Corynebacterium ammoniagenes, Flavimonas oryzihabitans, Kocuria kristinae, Kocuria rosea, Micrococcus lylae, Paenibacillus apiarius, Paenibacillus macerans and Pseudomonas syringae syringae. These results support the ethnomedicinal use of Falcaria vulgaris both for treatment of infectious diseases and use as preservative in traditional herby cheese. This result may also suggest that the methanol extracts of Falcaria vulgaris possess compounds with antibacterial properties and thus can be used as a natural preservative ingredient in food and pharmaceutical industry.
Intraoperative Endoscopic Retrograde Cholangiopancreatography in Patients With Complex Benign Biliary Tract Pathologies a Case Series
(Edizioni Luigi Pozzi, 2018) Ozkan, O.F.; Akbal, E.; Goret, C.C.; Goret, N.E.; Ozturk, A.; Cıkman, O.; Koçak, E.
INTRODUCTION: This study presents data about the intraoperative performance of Endoscopic Retrograde Cholangiopancreatography (ERCP) for different types of cases with acute, complex pathologies of the biliary tract. MATERIALS AND METHODS: We retrospectively enrolled cases with intraoperative ERCP performed for different acute complex bile duct pathologies (including injury and cystic stump leak). All patients were analyzed according to demographic findings, etiologies, management and results. RESULTS: Intraoperative ERCP was performed in 4 patients of whom 2 (50%) were female and 2 (50%) were male with different diagnoses. The median age of patients was 46.8 (range of 28-75) years. The diagnosis was bile duct injury in three patients and one had a complicated hydatid cyst with jaundice (T Bil: 18 mg dl-1). All patients were in septic condition. Patients underwent laparotomy and intraoperative ERCP was performed successfully by using the Rendezvous technique. For the last patient, intraoperative ERCP was used for diagnosis and management of bile leak in the cavity. CONCLUSION: Intraoperative endoscopic retrograde cholangiopancreatography is a safe and effective method for treatment of acute complex bile duct pathologies. © 2018 Edizioni Luigi Pozzi S.r.l. All Rights Reserved.