Mean Platelet Volume Could be a Possible Biomarker for Papillary Thyroid Carcinomas

Baldane, Suleyman,Ipekci, Suleyman H,Sozen, Mehmet,Kebapcilar, Levent Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.7

Thyroid cancer is the most prevalent endocrine cancer and is evident in nearly 5% of thyroid nodules. The correlation between mean platelet volume (MPV) and many other cancer types has been investigated previously. However, the correlation between papillary thyroid carcinoma (PTC) and MPV has not yet been studied in detail. The aim of this study was to examine whether MPV would be a useful inflammatory marker to differentiate PTC patients from cases of benign goiter and healthy controls. Preoperative MPV levels in patients with PTC were found to be significantly higher when compared with benign goiter patients and healthy controls ((respectively, 8.05 femtoliter (fl), 7.57 fl, 7.36 fl, p=0.001). After surgical treatment of PTC patients, a significant decrease in MPV levels was seen (8.05 fl versus 7.60 fl, p=0.005). ROC analysis suggested 7.81 as the cut-off value for MPV (AUC=0.729, sensitivity 60%, specificity 80%). In conclusion, maybe changes in MPV levels can be used as an easily available biomarker for monitoring the risk of PTC in patients with thyroid nodules, enabling early diagnosis of PTC.

Effects of flexible plate attached to the rear of the cylinder on flow structure

Suleyman Teksin,Sedat Yayla 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.3

In this experimental study, the flow structure in the wake flow region was investigated with the Particle image velocimetry technique (PIV) by attaching elastic plates at different lengths behind the cylinder. The flow structure occurred at the wake flow region altered depending on the length of the flexible matter. In this experiment, the strips with the lengths of 75, 90, 120, 135 and 180 mm were used to control instabilities. Diameter of the cylinder (D) is 60 mm and the water height (h w ) is 600 mm. Reynolds number was kept constant as 5000 based on cylinder diameter. The images were captured at mid-height of the cylinder (h m ) which is 250 mm. As a result of experimental studies, attached flexible strip suppressed vortex shedding occurred in the behind of the cylinder and it is observed that effect of the length flexible of the strip is pretty much. Maximum level of flow characteristics such as Reynolds stress, fluctuation velocities and turbulent kinetic energy were decreased with flexible splitter plate and shifted through the downstream region.

Synthesis, Characterization, Thermal Stability and Conductivity of New Schiff Base Polymer Containing Sulfur and Oxygen Bridges

Suleyman Culhao?lu,?smet Kaya 한국고분자학회 2015 폴리머 Vol.39 No.2

In this study, we proposed to synthesize thermally stable, soluble and conjugated Schiff base polymer (SbP). For this reason, a specific molecule namely 4,4"-thiodiphenol which has sulfur and oxygen bridge in its structure was used to synthesize bi-functional monomers. Bi-functional amino and carbonyl monomers namely 4,4"-[thio-bis(4,1-phenyleneoxy)] dianiline (DIA) and 4,4"-[thiobis(4,1-phenyleneoxy)]dibenzaldehyde (DIB) were prepared from the elimination reaction of 4,4"-thiodiphenol with 4-iodonitrobenzene and 4-iodobenzaldehyde, respectively. The structures of products were confirmed by elemental analysis, FTIR, <SUP>1</SUP>H NMR and <SUP>13</SUP>C NMR techniques. The molecular weight distribution parameters of SbP were determined by size exclusion chromatography (SEC). The synthesized SbP was characterized by solubility tests, TG-DTA and DSC. Also, conductivity values of SbP and SbP-iodine complex were determined from their solid conductivity measurements. The conductivity measurements of doped and undoped SbP were carried out by Keithley 2400 electrometer at room temperature and atmospheric pressure, which were calculated via fourpoint probe technique. When iodine was used as a doping agent, the conductivity of SbP was observed to be increased. Optical band gap (Eg) of SbP was also calculated by using UV-Vis spectroscopy. It should be stressed that SbP was a semiconductor which had a potential in electronic and optoelectronic applications, with fairly low band gap. SbP was found to be thermally stable up to 300℃. The char of SbP was observed 29.86% at 1000℃.

Computerized analysis of occlusal contacts in bruxism patients treated with occlusal splint therapy

Suleyman Hakan Tuna,Halil İbrahim Kılınc,Nihal Ozcan,Hasan Onder Gumus 대한치과보철학회 2013 The Journal of Advanced Prosthodontics Vol.5 No.3

PURPOSE Occlusal splints are commonly used to prevent tooth wear caused by bruxism. However, the effects of splints on occlusion are still unclear. Although it is rarely alluded in literature, splints can provoke severe occlusal alterations and other complications. This study was aimed to identify differences in the responses of individuals with bruxism and healthy individuals to a full-arch maxillary stabilization splint in terms of occlusal changes. MATERIALS AND METHODS Occlusal contacts in 20 (5 male, 15 female) bruxism patients and 20 (5 male, 15 female) controls with normal occlusion were evaluated before and after occlusal splint therapy. T-Scan III, a computerized occlusal analysis system, was used to simultaneously measure occlusion and disclusion times as well as left-right and anterior-posterior contact distributions before splint therapy and 3 months after therapy. Wilcoxon and Mann-Whitney U tests were used for statistical analyses (α=.05). RESULTS No differences were found in the posterior contact of bruxism patients before and after stabilization splint treatment. However, differences in posterior contact were observed between bruxists and normal individuals prior to treatment, and this difference disappeared following treatment. CONCLUSION The results of this study showed the use of a stabilization splint may not have an effect on occlusion. However, the area of posterior occlusal contact among bruxists was found to be greater than that of normal individuals. According to this study, the clinical use of splints may be harmless.

Coexistence of Darier's Disease and Acrokeratosis Verruciformis of Hopf

Suleyman Piskin,Aslihan Saygin,Latife Doganay,Deniz Kircuval,Eylem Gurkan 연세대학교의과대학 2004 Yonsei medical journal Vol.45 No.5

Darier's disease and acrokeratosis verruciformis are inherited with the same pattern and they share similar clinical properties. We present a patient with both Darier's disease and acrokeratosis verruciformis. The patient had had brownish and skin-colored papules, initially on her face and neck, since the age of 25. Similar lesions had gradually spread to various parts of her body and lastly the dorsal aspect of her feet. On dermatological examination, brownish and skin-colored, 2 to 5mm, keratotic papules were observed on her face, neck, both axillae, inframammary regions, and dorsa of the hands and feet. The nail examination revealed “V” shaped notches and longitudinal ridges on the fingers of both hands. The biopsy taken from the neck showed typical findings for Darier's disease. The biopsy from the dorsa of the left foot revealed the distinctive structures of acrokeratosis verruciformis. In this article the clinical and histopathological findings of these diseases are reviewed based on our patient.

On Ruled Surfaces with a Sannia Frame in Euclidean 3-space

Suleyman Senyurt,Kemal Eren 경북대학교 자연과학대학 수학과 2022 Kyungpook mathematical journal Vol.62 No.3

In this paper we define a new family of ruled surfaces using an othonormal Sannia frame defined on a base consisting of the striction curve of the tangent, the princi pal normal, the binormal and the Darboux ruled surface. We examine characterizations of these surfaces by first and second fundamental forms, and mean and Gaussian curvatures. Based on these characterizations, we provide conditions under which these ruled surfaces are developable and minimal. Finally, we present some examples and pictures of each of the corresponding ruled surfaces.

An Iatrogenically Unmasked Life Threatening Disease: Brugada Syndrome

Suleyman Ercan,Muhammed Oylumlu,Gokhan Altunbas,Vedat Davutoglu 대한심장학회 2013 Korean Circulation Journal Vol.43 No.6

Brugada syndrome is a life threatening disease that is usually overlooked during emergency service admissions. It is characterized by typical electrocardiography resembling right bundle branch block, static or dynamic ST-segment elevation in leads V 1-3. There is familial tendency in some cases. A majority of patients have a structurally normal heart and are likely to remain asymptomatic, however they may present to emergency departments with syncope and various serious arrhythmias. Therefore it is crucially important for emergency medicine physicians not to omit this potential diagnosis. Herein we report a case with Brugada syndrome which was iatrogenically unmasked after propafenone administration for atrial fibrillation.

Synthesis, Characterization and Supercapacitive Performances of Yttrium Doped Cobalt Oxide Films

Suleyman Kerli 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.71 No.7

Cobalt oxide and yttrium doped cobalt oxide films are produced with spraying method. The films are coated on glass and indium tin oxide substrates at 450 C. The obtained films have been examined by X-ray diffractometer and scanning electron microscopy devices. In this examination, yttrium doping is seen to cause deterioration in crystal scructure. Moreover, films’ electrochemical features have been studied. The electrochemical measurements of samples are performed with cyclic voltammetry, electrodes supercapasitor curves and impedance spectrometers have been measured. Electrochemical super capasitor performance test has been measured in 6 M KOH for electrolyte and has been studied with the speed of 0.1 V/s. It has been calculated that yttrium doping increases capacity and the maximum capacitance value is measured as 296 F/g

Is single port incisionless-intracorporeal conventional equipment-endoscopic surgery feasible in patients with retrocecal acute appendicitis?

Suleyman Cuneyt Karakus,Huseyin Kilincaslan,Naim Koku,Idris Ertaskin 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.85 No.2

Purpose: Since laparoscopic appendectomy was first described, various modifications, such as single port incisionless-intracorporeal conventional equipmentendoscopic surgery (SPICES), have been described for reducing pain and improving cosmetic results. In the retrocecal and retrocolic positions, attachments to the lateral peritoneum and cecum may lead to difficulties during SPICES, which is performed with only one port. Here, we present the effects of variations in the position of the vermiform appendix in treating acute appendicitis with SPICES. Methods: We retrospectively reviewed 52 children who underwent SPICES for acute appendicitis between March 2010 and November 2011 in our institution. One group (group A) consisted of 30 patients (mean age, 10.5 ± 2.5 years) with retrocecal appendix, while the other group (group B) included 22 patients (mean age, 10.9 ± 2.3 years) with the appendix lying free in the peritoneal cavity. Results: There were no significant differences between groups in terms of patient age, gender, success rate of SPICES, mean operating time, mean follow-up period, overall complication rates or mean postoperative hospitalization period. Conclusion: These results suggest that SPICES is a safe and feasible approach even in patients with retrocecal acute appendicitis.

A Comparison of Ghrelin, Glucose, Alpha-amylase and Protein Levels in Saliva from Diabetics

( Suleyman Aydin ) 생화학분자생물학회 2007 BMB Reports Vol.40 No.1