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Search Results: 1 - 10 of 167684 matches for " E. Ertugrul Karsak "
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Supplier Selection Using an Integrated Decision Making Approach Based on QFD and 2-Tuple Fuzzy Representation
Mehtap Dursun,E. Ertugrul Karsak
Lecture Notes in Engineering and Computer Science , 2012,
Is there a link between hyperuricemia, morning blood pressure surge, and non-dipping blood pressure pattern in metabolic syndrome patients?
Tutal E,Sayin B,Ertugrul DT,?bis A
International Journal of Nephrology and Renovascular Disease , 2013,
Abstract: Emre Tutal,1 Burak Sayin,1 Derun Taner Ertugrul,2 Avsin Ibis,1 Siren Sezer,1 Nurhan zdemir1 1Department of Nephrology, Baskent University Hospital, 2Department of Endocrinology and Metabolism, Ke i ren Training and Research Hospital, Ankara, Turkey Background: Hypertensive patients usually have a blunted nocturnal decrease, or even increase, in blood pressure during sleep. There is also a tendency for increased occurrence of cardiovascular events between 6 and 12 am due to increased morning blood pressure surge (MBPS). Co-occurrence of metabolic syndrome (MetS) and hypertension is also a common problem. Hyperuricemia might trigger the development of hypertension, chronic renal failure, and insulin resistance. In this study, we aimed to determine whether there is a relationship between hyperuricemia, MetS, nocturnal blood pressure changes, and MBPS. Method: A total of 81 newly diagnosed hypertensive MetS patients were included in this study. Ambulatory blood pressure monitoring of patients was done and patients’ height, weight, and waist and hip circumferences were recorded. Fasting blood glucose (FBG), lipid profile, creatinine, potassium, uric acid, hematocrit levels were studied. Results: Non-dipper (ie, those whose blood pressure did not drop overnight) patients had higher waist–hip ratios (WHR) (P = 0.003), uric acid (P = 0.0001), FBG (P = 0.001), total and low-density lipoprotein cholesterol levels (P = 0.0001). Risk analysis revealed that hyperuricemia was a risk factor for non-dipping pattern (P < 0.0001, odds ratio = 8.1, 95% confidence interval = 1.9–33.7). Patients in the highest quadrant for uric acid levels had higher FBG (P = 0.001), low-density lipoprotein cholesterol (P = 0.017), WHR (P = 0.01), MBPS (P = 0.003), and night diastolic blood pressure compared with lowest quadrant patients (P = 0.013). Uric acid levels were also positively correlated with night ambulatory blood pressure (ABP) (r = 0.268, P = 0.05), night diastolic blood pressure (r = 0.3, P = 0.05), and MBPS (r = 0.3, P = 0.05). Conclusion: Evaluation of hypertensive patients should also include an assessment of uric acid level and anthropometric measurements such as abdominal obesity. Hyperuricemia seems to be closely related to undesired blood pressure patterns and this may signal to the clinician that an appropriate therapeutic approach is required. Keywords: hypertension, uric acid, non-dipper
Prevalence of Subclinical Hypothyroidism among Patients with Acute Myocardial Infarction
Okuyan Ertugrul,Uslu Ahmet,Enhos Asim,Hepgul E. Gulcin
ISRN Endocrinology , 2011, DOI: 10.5402/2011/810251
Boundary Effects on Bose-Einstein Condensation in Ultra-Static Space-Times
L. Akant,E. Ertugrul,Y. Gul,O. T. Turgut
Physics , 2014,
Abstract: The boundary effects on the Bose-Einstein condensation of a Bose gas with a nonvanishing chemical potential on an ultra-static space-time are studied. High temperature regime, which is the relevant regime for the relativistic gas, is studied through the heat kernel expansion for both Dirichlet and Neumann boundary conditions. The high temperature expansion in the presence of a chemical potential is generated via the Mellin transform methods as applied to the harmonic sums representing the free energy and the depletion coefficient. The effects of boundary conditions on the relation between depletion coefficient and temperature are analyzed. The analysis is done for both charged and neutral bosons.
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]
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.
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.
The Effect of Precooling of Lettuces and Green Beans on the Ratio of Weight Loss and Net Weight after Storage
Esref Isik,Ertugrul Celik
Pakistan Journal of Biological Sciences , 2006,
Abstract: In this study, we investigated the effects of precooling and not precooling lettuce types Lital and Yedikule to +2 and +4°C and fresh bean types Aysekadin and Rodop to +8°C in a vacuum cooler on the weight loss and net weight of the products at the end of storage. No statistical difference in poststorage weight loss was found between vacuum precooling treatments in the lettuce trials; however, there was a significant (p<0.01) effect of vacuum precooling on poststorage weight loss in beans. Packaging of precooled products affected weight loss of lettuces and beans (p<0.01) and (p<0.05) significance, respectively. The weight loss in packaged products at the end of the vacuum cooling process was 1.82 and 0.74% in lettuces and beans, respectively, whereas in unpackaged products it was 5.05 and 2.41%. Plant types and packages affected the net weight of lettuces significance (p<0.01). Lital was the best product type with 42.34% net weight and packaging products was the best method with 44.95% net weight. No change in net weight was observed in the beans because there was no spoilage after storage.
Comparison of Generalized Estimating Equations' Performance in Clustered Binary Observations
Ertugrul COLAK,Kazim OZDAMAR
Trakya Universitesi Tip Fakultesi Dergisi , 2007,
Abstract: Objectives: The objective of this study is to compare the performance of generalized estimating equations (GEE) for analysis of clustered binary observations under varying group and observation numbers according to intraclass correlation coefficients (ICC).Materials and Methods: The comparison of GEE performance was made by using bias of parameter estimations through computer simulations under varying group sizes, ICC, number of clusters, and number of observations per cluster. Simulations were performed in SAS 9.0 by using Monte Carlo simulation method. Analyses were made with SAS GENMOD procedure.Results: When intraclass correlation coefficient was low (ICC<0.10), there was no significant difference in parameter estimation and their biases and it was observed that GEE gave reliable, consistent and unbiased estimations. However, when ICC increased (ICC>0.10), it was found that the parameter estimations were significantly biased. On the condition that total sample size is fixed; it was observed that, even though the general sample size was constant in all groups while the number of groups was decreasing, when the number of observations per cluster increased, parameter estimations and their biases weren't affected significantly and the effective factor in parameter estimation was ICC.Conclusion: Because GEE method uses population averaged logistic regression approach, it cannot explain the changes and correlations in clusters completely. The use of GEE method is inconvenient particularly for data sets which have ICC greater than 0.10.
Choice of drugs in the treatment of chronic hepatitis B in pregnancy
Ertugrul Guclu,Oguz Karabay
World Journal of Gastroenterology , 2013, DOI: 10.3748/wjg.v19.i10.1671
Abstract: The selection of antiviral drugs for chronic hepatitis B (CHB) treatment in pregnancy is very difficult since none of the drugs have been approved for use in pregnancy. Transmission from mother to newborn remains the most frequent route of infection in mothers with high viral load and positive hepatitis B e antigen status, even with the use of appropriate prophylaxis with hepatitis B virus (HBV) immunoglobulin and HBV vaccination. We read from the article written by Yi et al that lamivudine treatment in early pregnancy was safe and effective. However, we could not understand why adefovir dipivoxil (ADV) was used in three pregnancy cases, since ADV has been classified as pregnancy category C. In pregnancy, telbivudine or tenofovir should be selected when the treatment of CHB is necessary, since these drugs have been classified as Food and Drug Administration pregnancy risk category B.
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