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Search Results: 1 - 10 of 116 matches for " Ertugrul Erken "
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Mannose Binding Lectin Deficiency and Clinical Features
Ertugrul Erken
Arsiv Kaynak Tarama Dergisi , 2013,
Abstract: Innate immunity consists of macrophages, neutrophils, natural killer cells, mucosal immunuglobulins and the comlement system. Mannose binding lectin (MBL) takes part in innate immunity through opsonisation and complement activation. MBL deficiency is associated with some infections and autoimmune disorders. However some studies indicate that MBL deficiency alone is not essential for immunity but it may intensify the clinic picture of an immune deficiency that already exists. This article refers to clincal studies related to MBL and brings up the clinical importance of MBL deficiency. [Archives Medical Review Journal 2013; 22(4.000): 565-574]
The Evaluation of the Knee Joint in Terms of Magnetic Resonance Imaging Measurements in Osteoarthritis Patients: A Comparative Study Comprising a Control Group  [PDF]
Bozkurt Gulek, Gokhan Soker, Ertugrul Erken, Yakup Yesilkaya, Behice Durgun, Nazan Alpaslan, Eda S?ker, Omer Kaya, Eren Erken
Open Journal of Radiology (OJRad) , 2014, DOI: 10.4236/ojrad.2014.41014

The aim of this study was to assess the knee joints of osteoarthritis patients in terms of clinical and magnetic resonance imaging (MRI) measurements and draw definitive conclusions from these quantimetric data. In order to achieve the above-mentioned goal, the knees of individuals from two distinct groups were examined by MRI. One group consisted of osteoarthritis patients while the other comprised the control individuals. All individuals from both groups underwent clinical and MRI measurements concerning their knees. These data were compared by using the statistical software from the Statistical Package for Social Sciences (SPSS) v.15 program. Statistically significant differences were found between the control and patients groups in terms of the measurements of the second (short) diameter of the medial femoral condyle, and the intercondylar distance (p < 0.05). In addition to these findings, the Receiver Operating Characteristics (ROC) curve analysis gave statistically significant results for both of these measurements. The cutoff values for these criteria were as follows in sequence order: a sensitivity of 75% and a specificity of 52% for the medial femoral condyle, and a sensitivity of 70% and a specificity of 70% for the intercondylar distance. The ROC curve data may not be a deterministic outcome alone for this study. But it may in fact have a significant meaning when it is evaluated together with other statistically significant data. The t-test for Equality of Means, for example, gave significant results, concerning the measurements of the short axis of the medial femoral condyle and the intercondylar distance. It is well known that it is the medial portion of the knee joint which deteriorates the most during the process of osteoarthritis of the knee (OAK), and this complies with the results of this study.

The Usefulness of Renal Doppler Parameters in Chronic Kidney Disease: Is There a Cut-Off Value to Estimate End Stage Kidney Disease?  [PDF]
Bozkurt Gulek, Gokhan Soker, Ertugrul Erken, Fatma Ulku Adam, Halil Ibrahim Varan, Sibel Ada, Nazan Z. Alparslan, Omer Kaya, Eren Erken, Behice Durgun
Open Journal of Radiology (OJRad) , 2016, DOI: 10.4236/ojrad.2016.61003
Abstract: Aims: In this study, Doppler parameters were studied in patients with advanced stage renal disease, and the relationship between Doppler parameters and renal disease stage was investigated. Doppler values were evaluated for a cut-off value between normal and end-stage kidney disease group. Materials and methods: 50 patients with chronic kidney disease and 15 patients belonging to the same age group and with normal serum creatinine levels were comprised of the study and control groups. Resistivity and pulsatality indices were measured at the main renal arteries and interlobular arteries at both sides. Results: Statistically significant differences were found between the PI and RI values obtained from the main renal and interlobular arteries. PI sums were compared with those from the control group, and a cut-off value of 2.15 was found, with a sensitivity of 90% and a specificity of 86.7%. Conclusion: Any increase in the RI and PI values obtained from the main renal and interlobular arteries must bring to mind the possibility of advancing renal damage and interstitial fibrosis. Patients with and without renal parenchymal damage can be differentiated by means of comparing the total PI values obtained from the right and left main renal and interlobular arteries.
The role of William Fulbright in the movement against the Vietnam War
Ruth Erken
Historia Actual Online , 2005,
Abstract: The present paper, is dedicated to an important part of Fulbright’s political activities, i.e. his role in the movement against the Vietnam war, which has received relatively little attention so far. The author of this article examines the role of the American senator William Fulbright in the opposition to the war of Vietnam. For a correct comprehension of this attitude, it is necessary, as she defends itself in the text, to know the path, so much vitally as politics, of this personage and bear in mind the awakening of the conscience of the American people for the matters of national and international politics. Since it is very difficult to pinpoint a precise date for the outbreak of the Vietnam war, this paper focuses on the period between 1960 and 1970. American domestic policy of the 1960s must be seen against the background of considerable social challenges. The civil rights movement, which fought for equal rights for women, colored people, ethnic minorities in general, and the poor. One of these social movements was the antiwar movement. Therefore, there are going to be studied the determining social ones in which the movement of protest has to be fitted against the war of Vietnam, the origin and development of this one, the principal reactions to the same one and the role recovered by William Fulbright in the tense political and social situation that the conflict provided for the United States of the sixties and seventies.
Multiple-Input Multiple-Output OFDM with Index Modulation
Ertugrul Basar
Mathematics , 2015, DOI: 10.1109/LSP.2015.2475361
Abstract: Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is a novel multicarrier transmission technique which has been proposed as an alternative to classical OFDM. The main idea of OFDM-IM is the use of the indices of the active subcarriers in an OFDM system as an additional source of information. In this work, we propose multiple-input multiple-output OFDM-IM (MIMO-OFDM-IM) scheme by combining OFDM-IM and MIMO transmission techniques. The low complexity transceiver structure of the MIMO-OFDM-IM scheme is developed and it is shown via computer simulations that the proposed MIMO-OFDM-IM scheme achieves significantly better error performance than classical MIMO-OFDM for several different system configurations.
Generalized (kappa,mu)-Paracontact Metric Manifolds with xi(mu)=0
Irem Kupeli Erken
Mathematics , 2015,
Abstract: We give a local classification of generalized (kappa,mu)-Paracontact Metric Manifold which satisfies the condition xi(mu)=0. An example of such manifolds is presented.
Assessment of Proliferative Activity in Rat Brain With AgNOR Following Exposure to Magnetic Field
Hulya Cetin SORKUN,Nagihan YALCIN,Gulten ERKEN,Haydar Ali ERKEN
Journal of Neurological Sciences , 2009,
Abstract: Objective: Nucleolar organizer region (NORs) is directly related to cell cycle and is an indicator of cell proliferation. We explored, in the present study, whether there was a difference in proliferation between brain tissues subjected to magnetic field for different durations.Study Design: The study comprised 5 groups with six rats each. Groups A and B were exposed to magnetic fields for 2.5 hours/day and 2.5 minutes/day, respectively, everyday for three months. Sham groups for Group A (SA) and Group B (SB) were constructed and switched-off cellular phones were left in the same environment for the same duration as their corresponding experimental groups. Rat's brains were removed, placed in 10% formalin and 3 micron thick sections were obtained following routine histological methods. Sections were stained with AgNOR stain. The number of AgNORs for each 100 cortical neurons, hippocampal neurons, ependymal and choroid plexus cells were counted on every section with an immersion microscope objective.Results: Statistical analyses revealed that mean number of AgNORs was highest in Group A (3.69±0.54), followed by Group B (3.06±0.48). Even though there was no statistically significant difference between sham groups (SA=1.76±0.56 and SB=1.84±0.65, p=0.990), mean number of AgNORs in sham groups was significantly higher than the control group (1.29±0.42) (p≤0.05). Groups A and B differed significantly from the sham and control groups in terms of mean number of AgNORs (p≤0.001).Conclusion: Increased proliferative activity and protein synthesis in neuronal and glial cells of the brain tissue in response to exposure to magnetic field is demonstrated by AgNORs.
Hyperimmunoglobulin D Syndrome
Didem Arslan Tas,Eren Erken
Arsiv Kaynak Tarama Dergisi , 2013,
Abstract: Hyperimmunoglobulin D syndrome is one of the autoinflammatory syndromes which are characterized by febrile attacks. Recently it is made possible to reach more reliable data by the possibilities that are opened up by molecular genetics to highlight the aetiopathogenesis of this group of diseases. Hyperimmunoglobulin D syndrome could present itself with a broad spectrum of symptoms. Although most of the Hyperimmunoglobulin D syndrome patients are reported from Europe and especially Dutch ancestry, case reports are presented from all over the world. Hyperimmunoglobulin D syndrome should be kept in mind for the differential diagnosis of periodic fever syndromes or before accepting an familial meditterinenan fever patient as colchichine-resistant. [Archives Medical Review Journal 2013; 22(1.000): 55-64]
A Complete Study of Three-Dimensional Paracontact $(κ,μ,ν) $-SPACES
Irem Kupeli Erken,Cengizhan Murathan
Mathematics , 2013,
Abstract: This paper is a complete study of three-dimensional paracontact metric $(\tilde{\kappa},\tilde{\mu},\tilde{\nu})$-manifolds. Three dimensional paracontact metric manifolds whose Reeb vector field $\xi $ is harmonic are characterized. We focus on some curvature properties by considering the class of paracontact metric $(\tilde{\kappa},\tilde{\mu},\tilde{\nu})$-manifolds under a condition which is given at Definition 3.1. In Theorem 3.9, it is shown that this condition is meaningless in dimension higher than three and hence we study three dimensional case. We study properties of such manifolds according to the cases $\tilde{\kappa}>-1,$ $\tilde{\kappa}=-1, \tilde{\kappa}<-1$ and construct new examples of such manifolds for each case.
In Silico chloroplast SSRs mining of Olea species
Biodiversitas , 2012,
Abstract: Filiz E, Koc E. 2012. In Silico chloroplast SSRs mining of Olea species. Biodiversitas 13: 114-117. Simple sequence repeat (SSR) markers are highly informative and have been widely applied as molecular markers in genetic studies. The purpose of present study is to analyze the occurrence and distribution of chloroplast SSRs in genic and intergenic regions from Olea species viz., Olea europaea, Olea europaea subsp. cuspidate, Olea europaea subsp. europaea, Olea europaea subsp. maroccana, Olea woodiana subsp. woodiana by using bioinformatics tools. We identified 1149 chloroplast SSRs (cpSSRs) in all genome and a total of 340 (29.6%) was located in genic regions. It was observed that the most abundant repeat types were found mononucleotide SSR (66.7 %) followed by trinucleotide SSR (28.3 %), dinucleotide (2.7%), tetranucleotide (1.5%) and pentanucleotide (0.8%). cpSSRs located in genic regions were identified only mono- and trinucleotide motifs, the most abundant of which was trinucleotide (16.2%) followed by mononucleotide (14.3%). All types of repeat motif (mono-, di-, tri-, tetra- and pentanucleotide) were detected except hexanucleotide motifs. According to SSRs analysis, the most abundant observed motifs were identified for mono-, di-, tri-, tetra- and pentanucleotide cpSSRs A/T, AT/TA, AAG/CTT, AAAG/AGTTT, and AATCC/ATTGG respectively. This study results provided scientific base for phylogenetics, evolutionary genetics and diversity studies on different Olea species in future.
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