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Öğe Analysis of Poly (2-Hydroxyethyl Methacrylate)-co-Poly (4-Vinyl Pyridine) Copolymers [COP2,4] Irradiated: an EPR study(POLISH ACAD SCIENCES INST PHYSICS, 2016) Ceylan, Y.; Aydogmus, H. Yumurtaci; Usta, K.; Usta, A.; Ceylan, N.; Yilmaz, H.Poly(2-hydroxyethyl methacrylate)-co-poly(4-vinyl pyridine) and poly(HEMA)-co-poly-(4-VP) copolymers were synthesized by free radical polymerization. K2S2O8 was used as an initiator. Chain lengths of the copolymer was changed by varying the monomer/initiator ratio. These polymers have molarites of 2.6 and 2.1 respectively and are called COP2 and COP4. The samples were exposed to gamma rays at room temperature. After irradiation, the EPR spectra of COP2 and COP4 were recorded between 120 K and 450 K. From the temperature dependence of the line intensity, it was concluded that unpaired spin concentration in the irradiated samples has been changing with temperature. A theoretical study, presented in this report, was aimed to test success of the machine learning methods and to select the best learning method.Öğe Comparison of diphenhydramine and lidocaine for prevention of pain after injection of propofol: a double-blind, placebo-controlled, randomized study(LIPPINCOTT WILLIAMS & WILKINS, 2007) Apiliogullari, S.; Keles, B.; Apiliogullari, B.; Balasar, M.; Yilmaz, H.; Duman, A.Background and objective: Pain on injection is still a problem with propofol. The purpose of the study was to compare the effectiveness of diphenhydramine and lidocaine on pain caused by propofol at the site of injection. Methods: One hundred and eighty ASA I-II adults undergoing elective surgery were randomly assigned into three groups of 60 each. Group I (placebo) received 2 mL normal saline, Group 11 received 2 mL (40 mg) 2% lidocaine and Group III received 2 mL (20 mg) diphenhydramine intravenously (i.v.) during a 1-min venous occlusion, followed by propofol into a cephalic forearm vein of the antecubital fossa. Pain assessment was made immediately after propofol injection. Results: In the placebo group 25 (41.7%) patients experienced pain during propofol injection as compared to 2 (3.3%) and 3 (5.0%) in the lidocaine and diphenhydramine groups, respectively. The prevalence of pain and pain score were significantly less in both the lidocaine and diphenhydramine groups than in the placebo group (P = 0.00). No difference was found between the diphenhydramine and lidocaine groups (P = 0.60). Conclusion: Previous injection of diphenhydramine with venous occlusion can be considered as an alternative to lidocaine for reducing the prevalence of pain caused by injection of propofol into peripheral veins.Öğe The effect of obesity surgery on ghrelin levels(WILEY, 2017) Ayranci, M.; Vatansev, H.; Saracligil, B.; Tekin, G.; Yilmaz, H.; Vatansev, H.[Abstract not Available]
