Esen Akbay, Necatı Muşlu, Erdinç Nayır, Onural Özhan, Ahmet Kıykım,
Tópico(s): Systemic Lupus Erythematosus Research
2010 - Springer Science+Business Media | Journal of Endocrinological Investigation
İsmail Erden, Emine Çakcak Erden, Hakan Özhan, Ahmet Karabulut, Serkan Ordu, Mehmet Yazıcı,
Data related to the incidence and clinical outcome of acute myocardial infarction (AMI) in patients with preexisting coronary artery ectasia (CAE) are limited. We assessed whether infarct-related artery ectasia (EIRA) indicates an untoward clinical outcome in patients with AMI undergoing primary percutaneous coronary intervention (pPCI). Consecutive patients (n = 643) who presented with AMI and were treated with pPCI were analyzed retrospectively; 31 patients (4.8%) had EIRA. Patients who had EIRA were ...
Tópico(s): Coronary Artery Anomalies
2010 - SAGE Publishing | Angiology
Yusuf Serengil, Ferhat Gökbulak, Süleyman Özhan, Ahmet Hızal, Kamil Şengönül,
The effects of 11% thinning on the nutrient outflux of a deciduous forest ecosystem in Belgrad forest is investigated with a paired watershed study. The treatment was a selective cutting to remove 11% of the standing volume uniformly throughout the watershed. Skidding was done by horse dragging and residues were left on site. Regression equations for selected water quality parameters were computed for calibration period (1980–1985) and calculated output values for the first year of post-treatment ...
Tópico(s): Hydrology and Sediment Transport Processes
2007 - Elsevier BV | Forest Ecology and Management
Yusuf Serengil, Ferhat Gökbulak, Süleyman Özhan, Ahmet Hızal, Kamil Şengönül, A. Nihat Balcı, Necdet Özyuvacı,
Thinning is a common harvesting method in Turkey that is assumed to be an environmental-friendly and hydrological-effective forestry technique. This assumption, however, does not rely on sound knowledge since the eco-hydrological database in the region is poor. This paper presents a paired watershed experiment that has been established to measure the hydrological impacts of 11% thinning in a deciduous forest ecosystem. The treatment was a selective cutting to remove 11% of the standing volume in ...
Tópico(s): Soil erosion and sediment transport
2006 - Elsevier BV | Journal of Hydrology
Hande Si̇pahi̇, Ayse Feruze Mat, Yağmur Özhan, Ahmet Aydın,
The prevalence of depression has increased dramatically over the past few decades. Although depression is categorized as a brain disorder, its symptomatology includes some behaviors that also occur during chronic inflammatory stress. According to research, cytokine production and immune system activation may have a role in depression, so this relationship has received much attention. Moreover, there is a bidirectional relationship between oxidative stress and inflammation. Oxidative stress plays ...
Tópico(s): Vitamin D Research Studies
2022 - Bentham Science Publishers | Current Topics in Medicinal Chemistry
Feyzullah Ersöz, Özhan Özcan, Ahmet Burak Toros, Serdar Çulcu, Hasan Bektaş, Serkan Sarı, Esra Paşaoğlu, Soykan Arıkan,
Hemangiomas are the most common benign neoplasms affecting the liver. They occur at all ages. Most cases are asymptomatic and do not require any treatment. Rarely, hemangiomas can be pedunculated. İf they undergo torsion and infarction, they become symptomatic. Herein; we report the case of a 31 year old male presenting with features of acute appendicitis: continuous right iliac fossa pain, rebound, guarding tenderness at McBurney' s point, nausea, anorexia, shifted white blood cell count and a ...
Tópico(s): Neuroendocrine Tumor Research Advances
2010 - BioMed Central | World Journal of Emergency Surgery
Lokman Hekim Tanrıverdi, Onural Özhan, Ahmet Ulu, Azibe Yıldız, Burhan Ateş, Nigar Vardı, Ahmet Acet, Hakan Parlakpınar,
The MrgD receptor agonist, alamandine (ALA) and Mas receptor agonist, AVE0991 have recently been identified as protective components of the renin-angiotensin system. We evaluated the effects of ALA and AVE0991 on cardiovascular function and remodeling in angiotensin (Ang) II-induced hypertension in rats. Sprague Dawley rats were subject to 4-week subcutaneous infusions of Ang II (80 ng/kg/min) or saline after which they were treated with ALA (50 μg/kg), AVE0991 (576 μg/kg), or ALA+AVE0991 during the ...
Tópico(s): Hormonal Regulation and Hypertension
2022 - Wiley | Fundamental and Clinical Pharmacology
Şifa Turan, Ozhan M. Turan, Ahmet Baschat,
The rapid continuing development of 3-dimensional ultrasound imaging technologies has extended capabilities of fetal cardiac scanning beyond 2-dimensional imaging technologies and now provides a wide array of analytic possibilities. The acquisition of the 3D volume information is based on initial application of 2-dimensional imaging techniques including grey scale, Doppler, Power Doppler and B-flow modalities. Once the cardiac volume is obtained a combination of postprocessing tools such as surface ...
Tópico(s): Congenital Diaphragmatic Hernia Studies
2009 - Karger Publishers | Fetal Diagnosis and Therapy
Nurdan Yazıcı Bektaş, Ezgi Ersoy, Mehmet Boğa, Tuğçe Boran, Ercan Çınar, Gül Özhan, Ahmet C. Gören, Esra Eroğlu Özkan,
The study aims to determine the secondary metabolites of Hypericum androsaemum L. extracts by liquid chromatographyhigh resolution mass spectrometry (LC-HRMS), and investigate the antioxidant and cytotoxic activities of the plant. Cytotoxic activity was evaluated by MTT assay, and apoptosis induction abilities on human prostate adenocarcinoma (PC-3), and hepatocellular carcinoma (Hep G2) cell lines. Accordingly, major secondary metabolites were found as hederagenin (762 ± 70.10 μg/g) in the leaves dichloromethane ( ...
Tópico(s): Natural Compound Pharmacology Studies
2021 - Scientific and Technological Research Council of Turkey (TUBITAK) | TURKISH JOURNAL OF CHEMISTRY
Mehmet Ali Erkurt, İsmet Aydoğdu, Mustafa Dikilitaş, İrfan Kuku, Emın Kaya, Nihayet Bayraktar, Onur Özhan, İbrahim Özkan, Ahmet Sönmez,
<i>Objective:</i> The aim of the study was to evaluate the role of vitamin B<sub>12</sub> in patients with pernicious anemia. <i>Materials and Methods:</i> This study was conducted prospectively at the Turgut Özal Medical Center, Department of Hematology, between April and November 2002. Absolute numbers and ratio of the surface antigens of T and B lymphocyte subgroups, CD4/CD8 ratio were calculated in order to evaluate changes in leukocyte and lymphocyte numbers; ...
Tópico(s): Healthcare and Venom Research
2008 - Karger Publishers | Medical Principles and Practice
Hilmi Demirin, Hakan Özhan, Taner Uçgun, Ahmet Çeler, Şule Bulur, Habip Çil, Cemalettin Güneş, Hayriye Ak Yıldırım,
Aim Mean platelet volume (MPV) in the healthy population has not been studied before. Therefore, the aim of the study was to measure MPV in normal subjects in a large cohort of Turkish adults. Methods A total of 2298 subjects with a mean age of 50 (age range 18 to 92) were interviewed. Subjects who had smoking habit, diabetes, hypertension, coronary artery disease, dyslipidemia, chronic obstructive pulmonary disease, cancer, chronic use of any drugs including antiplatelets, heavy drinkers, metabolic ...
Tópico(s): Platelet Disorders and Treatments
2011 - Elsevier BV | Thrombosis Research
Umit Yörük, Kürşat Oğuz Yaykaşlı, Hakan Özhan, Ramazan Memişoğulları, Ahmet Karabacak, Serkan Bulur, Yusuf Aslantaş, Cengiz Başar, Ertuğrul Kaya,
Coronary artery disease (CAD) is the most important morbidity and mortality disease in the world. It is also one of the leading causes of death in Turkey. Omentin, a recently found adipocytokine, is reported to regulate insulin sensitivity. It has anti-inflammatory properties and is inversely associated with CAD. Omentin gene polymorphism in patients with CAD has not been studied yet. The aim of this study is to investigate the relationship between omentin Val109Asp polymorphism and CAD.This is an ...
Tópico(s): Adipokines, Inflammation, and Metabolic Diseases
2013 - Turkish Society of Cardiology | Anadolu Kardiyoloji Dergisi/The Anatolian Journal of Cardiology
Onural Özhan, Hakan Parlakpınar, Ahmet Acet,
Myocardial ischemia may occur as a result of pathophysiological and therapeutical applications such as atherosclerosis, thromboembolism, percutaneous transluminal coronary angioplasty, coronary artery bypass, and transplantation. In this study, we aimed to compare the effects of angiotensin (Ang) II type 2 (AT2 ) selective receptor agonist Compound 21 (C21), MAS receptor agonist AVE 0991, Ang II type 1 (AT1 ) selective receptor blocker losartan, and Ang-converting enzyme inhibitor captopril on haemodynamic ...
Tópico(s): Receptor Mechanisms and Signaling
2020 - Wiley | Fundamental and Clinical Pharmacology
Produção Nacional
Revisado por pares
Altan Onat, Gülay Hergenç, Hüseyin Uyarel, Hakan Özhan, Ali Metin Esen, Ahmet Karabulut, Sinan Albayrak, Günay Can, İbrahim Keleş,
<i>Aims:</i> The association of mild renal dysfunction (estimated glomerular filtration rate [eGFR] 60–89.9 ml/min/1.73 m<sup>2</sup>) with insulin resistance (IR) or metabolic syndrome (MS) needs be investigated in a population in which MS prevails. <i>Methods:</i> After excluding subjects with diabetes mellitus, 1,678 subjects from a representative cohort (median age 52 years) were studied cross-sectionally. eGFR was based on serum creatinine concentrations using the ...
Tópico(s): Diabetes, Cardiovascular Risks, and Lipoproteins
2007 - Karger Publishers | Kidney & Blood Pressure Research
Hakan Gerçekoğlu, Özhan Tarim, İsmail Ağar, Ahmet Korukçu, Hasan Karabulut, Hüseyin Soydemir, Onur Sokullu, Hüseyin Toklu, Candan B. Johansson, Besim Yiğiter, Ercüment A. Kopman,
Endotoxin activates white blood cells and complement and produces a spectrum of clinical syndromes ranging from fever to septic shock. Although production of endogenous endotoxemia during cardiopulmonary bypass (CPB) has recently been reported, the role of hypothermia on endotoxemia is not clear. In this study, we evaluated the effects of moderate (24-28 degrees C) and mild (32-34 degrees C) hypothermia on blood endotoxin levels. The study population consisted of 20 patients who underwent coronary ...
Tópico(s): Thermal Regulation in Medicine
1997 - Wiley | Journal of Cardiac Surgery
Ali Özhan Akyüz, Ahmet Parıl, Ahmet Giz,
Abstract Free‐radical copolymerization of vinyl pyrrolidone and acrylamide was performed in water at 60°C. Their copolymerization reactions were continued up to high conversions and reaction mixture sampled sequentially during the reaction. The compositions of the aliquots were measured by UV spectroscopy, and their polymer contents were obtained by gravimetry. Data are evaluated by a recent error in variables method developed for sequential sampling. Reactivity ratios are found as r A = 2.03 ± 0.14, ...
Tópico(s): Polymer Science and PVC
2006 - Wiley | Journal of Applied Polymer Science
Ozhan Celebiler, Ahmet Sönmez, Melike Erdim, M. Memet Özek, Ayhan Numanoğlu,
In contrast to the common clefts of the lip, alveolus and palate, the atypical clefts of the face may come in myriad patterns of clinical expression and are often not easy to define. In this report, a case of median craniofacial dysraphia is described. At presentation, the 3-month-old male patient had a bilateral complete cleft of the lip, alveolus and palate. The nose was wide and a horn was present on the nasal dorsum. Duplication of the metopic suture ending at the wide anterior fontanel; orbital ...
Tópico(s): Fetal and Pediatric Neurological Disorders
2007 - Elsevier BV | Journal of Cranio-Maxillofacial Surgery
Yunis Torun, Özhan Pazarcı, Ahmet Öztürk,
Tópico(s): Medical and Biological Sciences
2020 - | Cyprus Journal of Medical Sciences
Azibe Yıldız, Onural Özhan, Ahmet Ulu, Tugba Dogan, Büşra Bakar, Uğur Yılmaz, Elif Taşlıdere, İncilay Gökbulut, Seyhan Polat, Hakan Parlakpınar, Burhan Ateş, Nigar Vardı,
Tópico(s): Dye analysis and toxicity
2023 - Springer Science+Business Media | Environmental Science and Pollution Research
Ali Özhan Akyüz, Huceste Çatalgil‐Giz, Ahmet Giz,
Abstract PVP solutions were sonicated with high‐intensity ultrasound, and the weight‐average molecular weight was monitored by an ACOMP system. The use of continuous on‐line data to critically evaluate various models showed that the molecular weight decreased towards a limiting value. Theoretical and phenomenological models of evolution of the molecular weight during sonication are compared with the on‐line data. The Ovenall/Harrington/Madras and Giz and Tang models werer found to describe the results ...
Tópico(s): Thermal and Kinetic Analysis
2008 - Wiley | Macromolecular Chemistry and Physics
Ali Özhan Akyüz, Huceste Çatalgil‐Giz, Ahmet Giz,
Abstract Ultrasonic degradation of high molecular weight poly(vinylpyrrolidone) is monitored on‐line, by light scattering. Degradations are performed in water/methanol mixtures of various compositions at room temperature. The evolutions of the weight average molecular weight and the radius of gyration are monitored. The dependence of the radius of gyration on the molecular weight is found. The second virial coefficients ( A 2 ) of polymer samples in each solvent are found using Zimm plots. These mixtures ...
Tópico(s): Thermal and Kinetic Analysis
2009 - Wiley | Macromolecular Chemistry and Physics
Ahmet Baschat, Özhan Turan, S. Turan,
The Doppler evaluation of fetal venous flow-velocity waveforms is of clinical relevance in conditions that are associated with cardiovascular manifestations. In contrast to arterial flow, velocity waveform characteristics of the venous-flow profile relate to atrial pressure and volume changes throughout the entire cardiac cycle, producing a multiphasic flow pattern1. Among the fetal venous vessels, the ductus venosus has a special role because its flow is under active regulation and its anatomy ...
Tópico(s): Cardiovascular Function and Risk Factors
2012 - Wiley | Ultrasound in Obstetrics and Gynecology
Şifa Turan, Joshua I. Rosenbloom, Mostafa Hussein, Christoph Berg, U. Gembruch, Ahmet Baschat, Özhan Turan,
Fetal head and somatic growth dynamics differs in fetuses with congenital heart defects (CHD). We longitudinally characterized fetal head and somatic growth in relation to the type of CHD.Four hundred eleven exams from isolated CHD were compared with 1,219 controls. Head and somatic growth was assessed using head circumference (HC), brain volume (BrV = 1/6 × π × (HC/π)3)/2), fetal cephalization index (FCI = BrV/[estimated fetal weight]), and growth percentile. Umbilical and middle cerebral artery Doppler indices ...
Tópico(s): Fetal and Pediatric Neurological Disorders
2016 - Wiley | Journal of Clinical Ultrasound
Dinçer Aydın, Mehmet Alı Nahıt Şendur, Umut Kefeli, Olçun Ümit Ünal, Didem Taştekin, Murat Akyol, Eda Tanrıkulu, Aydın Çiltaş, Bala Başak Öven Ustaalıoğlu, Mükremın Uysal, Onur Esbag, Doğan Yazılıtaş, Özgür Tanrıverdi, Ahmet Bılıcı, Erkan Arpacı, Velı Berk, Tarkan Yetişyiğit, Nuriye Özdemir, İlhan Öztop, Ahmet Alacacıoğlu, Özhan Aydin, Melike Özçelik, Emre Yıldırım, Nur Dinç, Mahmut Gümüş,
Small bowel adenocarcinoma (SBA) is a rare tumor of the gastrointestinal system with poor prognosis. Because these are rarely encountered tumors, the aim of this multicenter study was evaluation of prognostic factors and adjuvant chemotherapy in patients with curatively resected SBA.A total of 78 patients diagnosed with curatively resected SBA were involved in the retrospective study. Forty-eight patients received 1 of 3 different chemotherapy regimens, whereas 30 patients did not receive any adjuvant ...
Tópico(s): Colorectal Cancer Surgical Treatments
2016 - Elsevier BV | Clinical Colorectal Cancer
Ceyda Kabaroğlu, Ece Onur, Burcu Barutçuoğlu, Bayram Özhan, Soner Erdinç, Ahmet Var, Oya Bayındır, Betül Ersoy,
Existence of low grade persistent inflammation in obese children may increase the risk of metabolic and cardiovascular events. The aim was to determine whether glucose intolerance has an influence on inflammatory markers in obese adolescents.45 obese adolescents (mean BMI: 30.34±5.42 kg/m²) were grouped as normal or impaired glucose tolerance. IL-6 and CRP levels were analyzed by commercially available kits. Chitotriosidase activity was measured by a fluorescence method and neopterin levels were ...
Tópico(s): Adipokines, Inflammation, and Metabolic Diseases
2011 - Elsevier BV | Clinical Biochemistry
Altan Onat, Hakan Özhan, Ali Metin Esen, Sinan Albayrak, Ahmet Karabulut, Günay Can, Gülay Hergenç,
Sex-specific effects of cigarette smoking on the development of metabolic syndrome (MS) and diabetes (DM), concomitant with its clinical impact on CHD, were prospectively evaluated in a cohort of 3385 participants (mean age 48 years), representative of Turks. Heavy smoking denoted smoking 11 or more cigarettes daily. During a mean 5.9-year follow-up, 485 incident cases of MS and 216 of DM were diagnosed. Among women, baseline characteristics as a whole were similar. Smoking status was inversely associated ...
Tópico(s): Health Promotion and Cardiovascular Prevention
2006 - Elsevier BV | Atherosclerosis
Elisa Llurba, Özhan Turan, Tania Kasdaglis, Chris Harman, Ahmet Baschat,
Objectives To test if emergence of third-trimester (T3) placental dysfunction is related to the impedance change in uterine artery blood flow resistance between the first trimester (T1) and T3. Study Design Mean T1 and T3 uterine artery (mUtA) pulsatility index (PI) was measured in 1098 singletons. Each patient's individual mUtA-PI change was calculated ([(T3 PI − T1 PI/interval in days)] × 100; ΔmUtA-PI). This parameter and T1 and T3 mUtA-PI z-scores were related to placenta-related disease (PRD) and to constitutionally ...
Tópico(s): Gestational Diabetes Research and Management
2012 - Thieme Medical Publishers (Germany) | American Journal of Perinatology
Kenan Turgutalp, Onural Özhan, Ebru Gök Oğuz, Mehmet Horoz, Ahmet Çamsarı, Arda Yılmaz, Ahmet Kıykım, Mustafa Arıcı,
Hyponatremia is a common electrolyte disorder in hospitalized patients. Clinical features, outcome and cost of hyponatremia-associated admission and hospitalization in elderly and very elderly patients are not well known.Elderly (>64 years) patients admitted to the emergency department (ED) and hospitalized between January 1, 2010, and December 31, 2010, were evaluated. Hyponatremia was defined as serum sodium level below 135 mmol/L. Hyponatremic patients were divided into two groups: group 1 (n = 150, ...
Tópico(s): Renal function and acid-base balance
2012 - Springer Science+Business Media | International Urology and Nephrology
Süleyman Özhan, A. Nihat Balcı, Necdet Özyuvacı, Ahmet Hızal, Ferhat Gökbulak, Yusuf Serengil,
The Universal Soil-Loss Equation (USLE) predicts annual soil loss from agricultural uplands under specified land use and management conditions. Recently, some attempts have been made to apply USLE to forest lands in Turkey. This regional application of USLE and its reliability should be tested against measured data, especially for forest ecosystems. Our objective was to compute the cropping management (C) and the support practice (P) factors of the equation together in a single numerical value as a ...
Tópico(s): Conservation, Biodiversity, and Resource Management
2005 - Elsevier BV | Forest Ecology and Management
S. Turan, Özhan Turan, Andrea Desai, Chris Harman, Ahmet Baschat,
A four-dimensional (4D) fetal echocardiographic technique utilizing spatiotemporal image correlation, tomographic ultrasound imaging display (STIC-TUI echo) and color Doppler has previously been shown to be effective in displaying the examination planes constituting the extended cardiac examination. The aim of this study was to evaluate the performance of this first-trimester STIC-TUI echo technique in identifying complex congenital heart disease (CHD) in high-risk pregnancies.This was a prospective ...
Tópico(s): Congenital Diaphragmatic Hernia Studies
2014 - Wiley | Ultrasound in Obstetrics and Gynecology