İdris Dağ, Alper Korkmaz, Bülent Saka,
Abstract The differential quadrature method based on cosine expansion is applied to obtain numerical solutions of the RLW equation. The propagation of single solitary wave is studied to validate the efficiency of the algorithm. Then, test problems including interaction of two and three solitary waves, undulation, and evolution of solitary waves are implemented. Solutions are compared with earlier results. Discrete conservation quantities are computed for test experiments. © 2009 Wiley Periodicals, ...
Tópico(s): Ocean Waves and Remote Sensing
2009 - Wiley | Numerical Methods for Partial Differential Equations
Erdem Kılıç, İlker Özeç, Hasan Yeler, Adnan Korkmaz, Bülent Ayas, Cesur Gümüş,
The aim of this study was to evaluate the effects of local and systemic simvastatin application on distraction osteogenesis.Eighteen New Zealand white rabbits underwent unilateral mandibular distraction osteogenesis. After 7 days of neutral fixation, 0.4 mm twice per day, distraction was performed for 10 days. Simvastatin was applied locally during the osteotomy phase with a gelatin sponge carrier and systemically during the distraction osteogenesis period by oral gavage. All animals were killed ...
Tópico(s): Bone Metabolism and Diseases
2008 - Elsevier BV | Journal of Oral and Maxillofacial Surgery
Ahmet Korkmaz, Bülent Kurt, İbrahim Yıldırım, Şeref Başal, Turgut Topal, Serdar Sadır, Şükrü Öter,
It was previously shown that nitric oxide produced by inducible nitric oxide synthase (iNOS) and peroxynitrite are responsible for cyclophosphamide (CP)-induced cystitis. Since endogenous production of peroxynitrite is known to lead to poly(ADP-ribose) polymerase (PARP) activation, in this study, the aim was to evaluate whether the PARP activation pathway is also included in the pathogenesis of CP-induced bladder ulceration in rats. A total of 48 male albino Wistar rats were divided into 5 groups. ...
Tópico(s): Polyomavirus and related diseases
2008 - SAGE Publishing | Experimental Biology and Medicine
Fatih Yalçın, Haldun Müderrisoğlu, Mehmet Erdi Korkmaz, Bülent Özin, Mehmet Baltalı, Fatma Yiğit,
Basal septal hypertrophy (BSH), a cause of left ventricular outflow tract (LVOT) obstruction, is thought to occur by increased ventricular dynamics. The aim of the study was to evaluate the effect of pharmacologic stress on LVOT gradients in a group of hypertensive patients with BSH. Dobutamine stress was used in 24 hypertensive patients (mean age 56 +/-8 years; 11 women) with BSH and 20 normal controls (mean age 54 +/-9 years; 7 women). Ejection fraction and myocardial mass, basal septal dimension, and LVOT ...
Tópico(s): Heart Rate Variability and Autonomic Control
2004 - SAGE Publishing | Angiology
Hakan Korkmaz, Bülent Öcal, Emel Çadallı Tatar, İlkan Tatar, Ali Özdek, Güleser Saylam, Hakan Hamdi Çelik,
Tópico(s): Head and Neck Surgical Oncology
2014 - Springer Science+Business Media | European Archives of Oto-Rhino-Laryngology
Fatih C. Korkmaz, Bülent Güzel,
The results of an experimental investigation of water entry of spherical and cylindrical shaped objects with hydrophobic surfaces are presented in this work. The test specimens have a varying deadrise angle. Drop tests have been set up for studying slamming by dropping test objects from various heights toward water surface. Different fluid dynamics phenomena like jet formation, cavity formation, water splashing and flow separation on solid surfaces are investigated and compared with under hydrophobic ...
Tópico(s): Surface Modification and Superhydrophobicity
2016 - Elsevier BV | Ocean Engineering
Melih Korkmaz, Bülent Arıkan, Y. Eren Suyolcu, B. Aslan, U. Serincan,
We report on the growth and opto-electronic characterization of type-II InAs/GaSb superlattice (SL) mid-wavelength infrared pin photodetector grown on a GaAs substrate. AlSb interfacial misfit array was employed at the GaAs buffer/GaSb epilayer interface to reduce the dislocation density of the SL structure grown on the lattice mismatched GaAs substrate. Optical and electrical performance of this sample (SL-GaAs) were then compared with the reference sample of the same structure grown on a GaSb substrate ( ...
Tópico(s): Chalcogenide Semiconductor Thin Films
2018 - IOP Publishing | Semiconductor Science and Technology
Aslı Atar, Mehmet Erdi Korkmaz, Bülent Özin,
Tópico(s): Cancer Treatment and Pharmacology
2010 - Turkish Society of Cardiology | Anadolu Kardiyoloji Dergisi/The Anatolian Journal of Cardiology
Hakan Erkan, Levent Korkmaz, Mustafa Tark Ağaç, Zeydin Acar, Abdülkadir Krş, Merve Erkan, Ayça Ata Korkmaz, Bülent Vatan, Ali Rıza Akyüz, Halit Çnarka,
The assessment of subclinical atherosclerosis is important in the evaluation of a hypertensive patient, as it provides information on the severity of the hypertension and the cardiovascular risk. The aim of this study was to determine the usefulness of the aortic knob width measured on chest radiography in the assessment of subclinical atherosclerosis in hypertensive patients.A total of 126 consecutive hypertensive patients were enrolled. In univariate analysis, there was a strong correlation between ...
Tópico(s): Blood Pressure and Hypertension Studies
2011 - Lippincott Williams & Wilkins | Blood Pressure Monitoring
Şule Yiğit, Ayşe Korkmaz, Bülent Enis Şekerel,
Abstract: Fever, skin reactions, and limb edema because of drug‐induced hypersensitivity have been reported in children because of various drugs, mainly aromatic antiepileptic drugs such as phenytoin, phenobarbital, carbamazepin, and primidone. The skin reactions differ in severity and range from mild maculopapular erythema to exfoliative dermatitis. They have been described in older children but have not been reported in newborn infants. We report a premature newborn infant who developed fever, ...
Tópico(s): Blood disorders and treatments
2005 - Wiley | Pediatric Dermatology
Mehmet Hakan Korkmaz, Bülent Öcal, Güleser Saylam, Erman Çakal, Ömer Bayır, Esra Tutal, Emel Çadallı Tatar,
Tópico(s): Head and Neck Anomalies
2017 - Springer Science+Business Media | Langenbeck s Archives of Surgery
Özge Polat Korkmaz, Bülent Saraç, Sabahattin Göksel, Şahin Yıldırım, Öcal Berkan, İhsan Bağcıvan,
ObjectiveBeta-blockers are a heterogeneous class of agents that are used in the treatment of many cardiovascular diseases, especially hypertension and atherosclerosis, and that are commonly prescribed after cardiac surgery. In the present study, the aim is to investigate the vasorelaxant effects of some common beta-adrenoceptor blockers on the human radial artery in vitro, as well as their relaxation mechanisms.MethodsRadial artery rings sourced from human patients were mounted in an organ bath ...
Tópico(s): Cardiac and Coronary Surgery Techniques
2015 - Elsevier BV | Journal of Thoracic and Cardiovascular Surgery
Mehmet Özler, Ahmet Korkmaz, Bülent Uysal, Kemal Şimşek, Cansel Köse Özkan, Turgut Topal, Şükrü Öter,
Objective: Reactive oxygen species are known to increase on a chronic wound background. We therefore investigated the possible efficacy of the topical administration of melatonin and vitamin E, known to have radical scavenging properties, in the ischemic wound model. Methods: Forty Sprague-Dawley type adult male rats were divided into 4 groups as normal wound, ischemic group, and with vitamin E or melatonin applied to the ischemic wound. Bipedicular flap surgery to the shaved back of the rats was ...
Tópico(s): Skin Protection and Aging
2011 - | Journal of Experimental and Integrative Medicine
Fatih C. Korkmaz, Bülent Güzel,
In this study, the effect of hydrophobicity in reducing the impact forces during the water entry of complex geometries has been demonstrated on bow flare slamming and wet deck slamming.Superhydrophobic surfaces with a contact angle of 160 0 and a hysteresis of 3 0 which shows a wetting regime in the Cassie-Baxter state were obtained via a chemical coating.By conducting drop tests with a bow flare ship section model and a catamaran section model at various impact velocities, jet flows, water pileups ...
Tópico(s): Ship Hydrodynamics and Maneuverability
2020 - Faculty of Mechanical Engineering and Naval Architecture | Brodogradnja
Fatih C. Korkmaz, Bülent Güzel,
Tópico(s): Coastal and Marine Dynamics
2021 - Taylor & Francis | Ships and Offshore Structures
Serhat Durusoy, Ahmet Emre Paksoy, Murat Korkmaz, Bülent Dağlar, Fatma Kübra Erbay Elibol,
Cephalomedullary nails are tools commonly used for surgical fixation in proximal femoral fractures. The most common complications in their use are varus collapse and screw cutout of the femoral head. The objective of this study is to examine the effects of intramedullary nail movement on varus collapse and screw cutout. The study was conducted on 70 composite femur models treated with PFNA. We divided the femurs into 4 groups based on the differences in nail diameter, fracture type and filling of ...
Tópico(s): Orthopaedic implants and arthroplasty
2021 - Elsevier BV | Orthopaedics & Traumatology Surgery & Research
Osman Dönmez, Hüseyin Anıl Korkmaz, Nalan Yıldız, Bülent Ediz,
Background: Pediatric studies are relatively scarce on the superiority of cystatin C over creatinine in estimation of glomerular filtration rate (GFR). This study measured cystatin C and serum creatinine levels, and compared GFR estimated from these two parameters in patients with chronic renal disease. Methods: This prospective, observational, controlled study included 166 patients aged 1–18 years diagnosed with stage I to III chronic renal disease, and 29 age- and sex-matched control subjects. ...
Tópico(s): Acute Kidney Injury Research
2015 - Taylor & Francis | Renal Failure
Görkem Güngör, I. Serbez, Bilgehan Temur, Gökhan Gür, N. Kayalılar, Teuta Zoto Mustafayev, Latif Korkmaz, Gökhan Aydın, Bülent Yapıcı, Banu Atalar, Enis Özyar,
Purpose To document time analysis of detailed workflow steps for the online adaptive magnetic resonance–guided radiation therapy treatments (MRgRT) with the ViewRay MRIdian system and to identify the barriers to and solutions for shorter treatment times. Methods and Materials A total of 154 patients were treated with the ViewRay MRIdian system between September 2018 and October 2019. The time process of MRgRT workflow steps of 962 fractions for 166 treatment sites was analyzed in terms of patient ...
Tópico(s): Medical Imaging Techniques and Applications
2020 - Elsevier BV | Practical Radiation Oncology
Ercan Göçgeldi, Bülent Uysal, Ahmet Korkmaz, Recai Oğur, Russel J. Reıter, Bülent Kurt, Şükrü Öter, Turgut Topal, Metin Hasde,
It is well known that the intake of paraquat (PQ) causes severe tissue injury leading to numerous fatalities. Considering that the main target for PQ toxicity is the lung and involves the production of reactive oxygen and nitrogen species, transcription factors and inflammatory cytokines, it may be hypothesized that the combination of a potent antiinflammatory and antioxidant agent may counteract more of PQ's effects than an antiinflammatory agent alone. For this purpose, combination of dexamethasone ( ...
Tópico(s): Saffron Plant Research Studies
2008 - SAGE Publishing | Experimental Biology and Medicine
Fatma Yiğit, Haldun Müderrisoğlu, Galip Güz, Hüseyin Bozbaş, Mehmet Erdi Korkmaz, Bülent Özin, Egemen Tayfun,
Coronary artery disease is the most important cause of morbidity and mortality in patients with end-stage renal failure (RF). Hypercholesterolemia is an important risk factor for coronary heart disease. Patients with chronic renal failure (CRF) have difficulties in compliance with their care and treatment. Intermittent simvastatin treatment may help to increase compliance and can be a treatment alternative in patients with CRF at risk of coronary artery disease. We investigated the effects of simvastatin ...
Tópico(s): Health Systems, Economic Evaluations, Quality of Life
2004 - Japanese Heart Journal Assoc | Japanese Heart Journal
Mehmet Oğuz Öztoprak, Fulya Işık, Korkmaz Sayınsu, Tülin Arun, Bülent Aydemir,
Introduction: The purpose of this study was to assess the effect of blood and saliva contamination on the shear bond strength of 4 orthodontic adhesives. Methods: Four adhesives (Transbond XT primer [3M Unitek, Monrovia, Calif], Transbond Plus self-etch primer [3M Unitek], Assure hydrophilic primer [Reliance, Itasca, Ill], and SmartBond cyanoacrylate [Gestenco, Gothenburg, Sweden]) were used to bond stainless steel maxillary central incisor brackets to 120 bovine permanent mandibular incisors. The teeth ...
Tópico(s): Dental Erosion and Treatment
2007 - Elsevier BV | American Journal of Orthodontics and Dentofacial Orthopedics
Fatih C. Korkmaz, Bülent Güzel,
The wave impingement on the side walls due to the oscillation of a rectangular tank under harmonic sway motion is analysed experimentally with hydrophobic coated and uncoated tank surfaces. Impact pressures and free surface deformations are compared in three water filling levels over an excitation frequency range encompassing the first natural frequency. The reduced hydrodynamic loads acting on the tank walls are observed under hydrophobic effects and discussed in detail. Experimental observations ...
Tópico(s): Oil Spill Detection and Mitigation
2023 - Elsevier BV | Experimental Thermal and Fluid Science
Hüseyin Bozbaş, Mehmet Erdi Korkmaz, İlyas Atar, Serpil Eroğlu, Bülent Özin, Aylin Yı́ldı́rı́r, Haldun Müderrisoğlu, T. Çolak, H. Karakayalı, Mehmet Haberal,
Abstract Background : Cardiac troponins are very sensitive and specific indicators of myocardial damage; however, they are sometimes found to be increased in patients with end‐stage renal disease (ESRD). Hypothesis : The aim of this study was to determine cardiac troponin I (cTpI) and creatine kinase myocardial isoform (CK‐MB) levels and to assess their diagnostic and prognostic importance before and after renal transplantation. Methods : Thirty‐four patients with ESRD (mean age 31.8 ± 8.6 years, 11 women) ...
Tópico(s): Cardiac Valve Diseases and Treatments
2004 - Wiley | Clinical Cardiology
Mehmet Erdi Korkmaz, Haldun Müderrisoğlu, Melek Uluçam, Bülent Özin,
Recent data show that blockade of aldosterone receptors by spironolactone reduces the risk of morbidity and death among patients with severe heart failure. Heart failure secondary to ischemia is characterized by an imbalance of the autonomic nervous system, which can be assessed by analysis of the heart rate variability (HRV). Spironolactone's effects on HRV are not well defined. If spironolactone has beneficial effects on HRV, this would contribute to favorable results. We therefore measured Holter- ...
Tópico(s): Heart rate and cardiovascular health
2000 - Elsevier BV | The American Journal of Cardiology
Murat Öz, Elmas Korkmaz, Nilüfer Çetinkaya, Sevda Baş, Bülent Özdal, Mehmet Mutlu Meydanl, Tayfun Güngör,
To compare the effectiveness of topical lidocaine spray compared to a placebo for relieving pain during colposcopic cervical biopsies and endocervical curettage.This randomized, placebo-controlled, double-blind study included patients with abnormal cervical cytologic results requiring colposcopy and directed cervical punch biopsy with or without endocervical curettage (ECC). The patients were randomly assigned to either the 10% lidocaine spray or the placebo group. The patients were asked to rate ...
Tópico(s): Endometrial and Cervical Cancer Treatments
2014 - Lippincott Williams & Wilkins | Journal of Lower Genital Tract Disease
Ünal Korkmaz, Bahar Tuba Fındık, Bülent Dede, Fatma Karipcin,
An oxime ligand (HL) was synthesized by the condensation of 4-biphenylhydroxymoyl chloride with 2-amino-5-bromopyridine. The oxime ligand was reacted with l-phenylalanine and metal(II) acetate salts (Co(II), Ni(II), and Cu(II)) to synthesize mixed-ligand complexes. Structural elucidation of the newly synthesized ligand and complexes was performed by elemental analysis, 13C NMR, 1H NMR, FT-IR, ICP-OES, the measurements of molar conductivity and magnetic susceptibility. The thermal properties of the ...
Tópico(s): Synthesis and biological activity
2022 - Elsevier BV | Bioorganic Chemistry
Bahar Pirat, Haldun Müderrisoğlu, Mehmet Erdi Korkmaz, Bülent Özin,
The aim of this study was to identify the characteristics of coronary heart disease (CHD) in renal transplant recipients as well as to assess the impact of coronary angiography on allograft function. The 21 cases including 2 women and 19 men who underwent coronary angiography were retrospectively studied for age at transplantation and at diagnosis of coronary disease; risk factors; angio findings; serum creatinine and blood urea nitrogen (BUN) values before and after angio; and revascularization procedures. ...
Tópico(s): Infective Endocarditis Diagnosis and Management
2004 - Elsevier BV | Transplantation Proceedings
Aliihsan Gemici, İsmet Aydoğdu, Hatice Terzi, Mehmet Şencan, Alma Aslan, Ali Kaya, Mehmet Sinan Dal, Meltem Olga Akay, Mehmet Hilmi Doğu, Orhan Ayyıldız, Fahri Şahin, Gülsüm Akgün Çağlıyan, Mehmet Birhan Yılmaz, Zafer Gökgöz, Yusuf Bilen, Cengiz Demır, Ömür Gökmen Sevindik, Serdal Korkmaz, Bülent Eser, Fevzi Altuntaş,
Nodular lymphocyte predominant Hodgkin's lymphoma (NLPHL) is a rare subtype of Hodgkin's lymphoma. In this study, we aimed to investigate the clinical features and therapeutic outcomes of patients with NLPHL who were diagnosed at different institutes in Turkey. We retrospectively reviewed the records of the patients diagnosed with NLPHL. Adult patients who were diagnosed after 2005 with histological confirmation were selected for the study. Forty-three patients were included in the study. Median ...
Tópico(s): CNS Lymphoma Diagnosis and Treatment
2017 - Wiley | Hematological Oncology
Mehmet Artaç, Levent Korkmaz, Hasan Şenol Çoşkun, Faysal Dane, Bülent Karabulut, Mustafa Karaağaç, Devrim Çabuk, Senem Karabulut, Nuri Faruk Aykan, Hüseyin Doruk, Nilüfer Avcı, N. S. Turhal,
Tópico(s): Metabolism, Diabetes, and Cancer
2018 - Springer Science+Business Media | Journal of Gastrointestinal Cancer
Ahmet Korkmaz, Hakan Yaren, Zeki Ilker Kunak, Bülent Uysal, Bülent Kurt, Turgut Topal, Levent Kenar, Ergün Uçar, Şükrü Öter,
Among the most readily available chemical warfare agents, sulfur mustard (SM), also known as mustard gas, has been the most widely used chemical weapon. SM causes debilitating effects that can leave an exposed individual incapacitated for days to months; therefore delayed SM toxicity is of much greater importance than its ability to cause lethality. Although not fully understood, acute toxicity of SM is related to reactive oxygen and nitrogen species, oxidative stress, DNA damage, poly(ADP-ribose) ...
Tópico(s): Nitrogen and Sulfur Effects on Brassica
2008 - De Gruyter Open | Interdisciplinary Toxicology