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Search Results: 1 - 10 of 150017 matches for " Hüseyin Engin "
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Determination of serum adenosine deaminase and xanthine oxidase levels in patients with crimean-congo hemorrhagic fever
Celik, V. Kenan;Sari, Ismail;Engin, Aynur;Gürsel, Yildiz;Aydin, Hüseyin;Bakir, Sevtap;
Clinics , 2010, DOI: 10.1590/S1807-59322010000700008
Abstract: objective: crimean-congo hemorrhagic fever is an acute viral hemorrhagic fever with a high mortality rate. despite increasing knowledge about hemorrhagic fever viruses, little is known about the pathogenesis of crimean-congo hemorrhagic fever. in this study, we measured serum adenosine deaminase and xanthine oxidase levels in crimean-congo hemorrhagic fever patients. methods: serum adenosine deaminase levels were measured with a sensitive colorimetric method described by giusti and xanthine oxidase levels by the method of worthington in 30 consecutive hospitalized patients (mean age 42.6 ± 21.0). laboratory tests confirmed their diagnoses of crimean-congo hemorrhagic fever. thirty-five subjects (mean age 42.9 ± 19.1) served as the control group. results: there was a significant difference in adenosine deaminase and xanthine oxidase levels between cases and controls (p<0.05). however, neither adenosine deaminase nor xanthine oxidase levels varied with the severity of disease in the cases assessed (p>0.05). conclusion: adenosine deaminase and xanthine oxidase levels were increased in patients with crimean-congo hemorrhagic fever. elevated serum xanthine oxidase activity in patients with crimean-congo hemorrhagic fever may be associated with reactive oxygen species generated by the xanthine/xanthine oxidase system during inflammatory responses. in addition, elevated lipid peroxidation may contribute to cell damage and hemorrhage. the association of cell damage and hemorrhage with xanthine oxidase activity should be further investigated in large-scale studies.
Acute Myocardial Infarction Caused by Filgrastim: A Case Report
Cemil Bilir,Hüseyin Engin,Yasemin Bakkal Temi,Bilal Toka
Case Reports in Oncological Medicine , 2012, DOI: 10.1155/2012/784128
Acute Myocardial Infarction Caused by Filgrastim: A Case Report
Cemil Bilir,Hüseyin Engin,Yasemin Bakkal Temi,Bilal Toka,Turgut Karaba?
Case Reports in Oncological Medicine , 2012, DOI: 10.1155/2012/784128
Abstract: Common uses of the granulocyte-colony stimulating factors in the clinical practice raise the concern about side effects of these agents. We presented a case report about an acute myocardial infarction with non-ST segment elevation during filgrastim administration. A 73-year-old man had squamous cell carcinoma of larynx with lung metastasis treated with the chemotherapy. Second day after the filgrastim, patient had a chest discomfort. An ECG was performed and showed an ST segment depression and negative T waves on inferior derivations. A coronary angiography had showed a critical lesion in right coronary arteria. This is the first study thats revealed that G-CSF can cause acute myocardial infarction in cancer patients without history of cardiac disease. Patients with chest discomfort and pain who are on treatment with G-CSF or GM-CSF must alert the physicians for acute coronary events. 1. Introduction Granulocyte-colony stimulating factors (G-CSF) are commonly used in patients with chemotherapy-induced neutropenia. Recently G-CSF has been used in clinical trials to research neovascularization and/or to reduce the damaged size of infarct. Common uses of the granulocyte-colony stimulating factors in the clinical practice raise the concern about side effects of these agents. Studies showed that nearly 5% of patients undergoing peripheral blood stem cell mobilization with G-CSF developed venous thromboembolic events (VTEs) [1]. In addition an early dose escalation study for G-CSF revealed that 5/39 patients had chest pain and 1/39 patient had abnormal ST segment depression [2]. We also presented a case about an acute myocardial infarction with non-ST segment elevation during filgrastim administration. 2. Case Report A 73-year-old man had squamous cell carcinoma of larynx with lung metastasis treated with the chemotherapy including the docetaxel, cisplatin, and fluorouracil regimen. The patient was admitted to the hospital for pneumonia after the 3rd course of chemotherapy. Piperacillin tazobactam of ?gr per day was given. On the 4th day of the treatment of antibiotic, patients become neutropenic without fever, and then filgrastim 5?mcg/kg/day was administered. Patient had a chest discomfort on the second day of filgrastim administration. An ECG was performed, and ST segment depression with negative T waves on inferior derivations of the ECG had been determined (Figure 1). Patient’s ECG was normal on admission to the hospital. Cardiac enzymes analysis were elevated, and value of troponin I was 1,9?ng/mL and value of CK-MB was 7,3(5,5)?ng/mL. Filgrastim was
Detection of Changes on Temperature and Precipitation Features in Istanbul (Turkey)  [PDF]
Hüseyin Turo?lu
Atmospheric and Climate Sciences (ACS) , 2014, DOI: 10.4236/acs.2014.44050
Abstract: In this study, the changes in the data of Istanbul’s precipitation and temperature and the features of these changes were analyzed by different methods. In the analyses the daily precipitation and temperature data sets of Florya and Goztepe Meteorological Stations which have similar locational features were used. These sets were recorded between 1960 and 2013 (for 54 years). In order to emphasize the differentiations in the last 15 years the analyses were conducted comparatively both for the 15-year and for the 54-year periods and then the results were evaluated. The changes in the monthly, annual and seasonal quantity, type and frequency of the precipitation in the form of rain and the features of the temperature’s monthly, annual and seasonal changes, the De Martonne aridity index and the Thornthwaite climate classification were carried out. The results showed that during the years from 1999 to 2013 the climate type of Istanbul changed from semi-humid climate to arid and less-humid climate. Most notably the precipitation during the warm periods has decreased, but the frequency of the intense rain has increased and the majority of these episodes of intense rain coincided with the warm periods. Other determinations were the rise in the annual average temperature and the extension of the warm periods in a year. This differentiation of the temperature features can lead to the aggravation of the evaporation and it can be effective for a longer period during the year. Being aware of this differentiation in the features of precipitation and temperature and taking these data into consideration in all sorts of planning and managing strategies have a special importance for the 14 million or more people living in Istanbul.
The Study of Teachers’ General Cynicism Inclinations in Terms of Life Satisfaction and Other Variables  [PDF]
Hüseyin Aslan, Ercan Yilmaz
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.49084

This research aims to examine teachers’ general cynicism inclinations in respect to some variables and life satisfaction level and the relevance of these inclinations with gender, relationship status and membership of a union. Research is carried out using relational inquiry module and the study group of it constituted of 395 primary school teachers who are working in Ankara during academic year of 2012-2013 and selected with the help of modeling of inordinate set. The data are collected with “The Scale of Life Satisfaction” and tested by making use of multiple regression technique. Whether the differentiation levels of teachers’ general cynicism inclinations are related with their genders, relationship status and their membership of a union are analyzed using T test. As a result, male teachers have higher degree of cynicism in cognitive dimension than female teachers. Moreover, these general cynicism inclinations in cognitive, affective and behavioral dimensions do not differ greatly according to teachers’ membership of a union and relationship status. It is observed that the cognitive and affective dimensions of general cynicism inclinations have negative-sided relation with teachers’ life satisfaction rates.

Application of Ant Colony Optimization for the Solution of 3 Dimensional Cuboid Structures  [PDF]
Hüseyin Eldem, Erkan ülker
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.24014

Traveling Salesman Problem (TSP) is one of the most widely studied real world problems of finding the shortest (minimum cost) possible route that visits each node in a given set of nodes (cities) once and then returns to origin city. The optimization of cuboid areas has potential samples that can be adapted to real world. Cuboid surfaces of buildings, rooms, furniture etc. can be given as examples. Many optimization algorithms have been used in solution of optimization problems at present. Among them, meta-heuristic algorithms come first. In this study, ant colony optimization, one of meta-heuristic methods, is applied to solve Euclidian TSP consisting of nine different sized sets of nodes randomly placed on a cuboid surface. The performance of this method is shown in tests.

Application of the Hybrid Differential Transform Method to the Nonlinear Equations  [PDF]
Inci ?ilingir Süngü, Hüseyin Demir
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.33039
Abstract: In this paper, a hybrid method is introduced briefly to predict the behavior of the non-linear partial differential equations. The method is hybrid in the sense that different numerical methods, differential transform and finite differences, are used in different subdomains. Our aim of this approach is to combine the flexibility of differential transform and the efficiency of finite differences. An explicit hybrid method for the transient response of inhomogeneous nonlinear partial differential equations is presented; applying finite difference scheme on the fixed grid size is used to approximate the space discretisation, whereas the differential transform method is used for time operator. Comparison of the efficiency of the different approaches is a very important aspect of this study. In our test cases, the hybrid approach is faster than the corresponding highly optimized finite difference method in two dimensional computations. We compared our hybrid approach’s results with the exact and/or numerical solutions of PDE which obtained from Adomian Decomposition Method. Results show that the hybrid approach may be an important tool to reduce the execution time and memory requirements for large scale computations and get remarkable results in predicting the solutions of nonlinear initial value problems.
The Massive Sulfide Deposit of Siirt Madenk?y, South-Eastern Turkey  [PDF]
Dicle Bal-Akkoca, Hüseyin ?elebi
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2018, DOI: 10.4236/jmmce.2018.62012
Abstract: The Siirt Madenköy massive sulfide ore deposit has been in operation since 2005. With its approx. 39 Mt reserves (2.40% Cu), it represents the largest Cu deposit and the largest mining operation in the country (1.5 Mt ore/year). The thickness of the adjacent rocks is composed of olivine-pyroxenite basalts pillow lava, which is spilite, interchangeable ore lenses of chalcopyrite and pyrite is about 170 m and reaches a depth of 350 m. The mid-Eocene aged porphyritic, strongly altered spilites are locally interspersed with diabase and covered by conglomerates. The ores appear massive, stock work and disseminated. Main ore minerals are idiomorphic pyrite, cataclastic chalcopyrite and fine-grained magnetite. The geochemical composition of the Cu ores of the Siirt-Madenköy deposit shows in places high levels of Cu, Fe and S, as important trace elements, As, Ba, Co and Ti are listed. In relation to Clarke values, Se, Bi, Cu, Mo and Co are strongly enriched, while Na, K and Ca as well as their coherent trace elements Rb, Sr and Cd are depleted due to hydrothermal alteration. The elemental distribution is characterized by log-normal distribution, proportionality effect, high Cu/Ni ratio and significantly positive correlation between the element pairs MgO-Ni, Cr-Ni and Co/FeO-Co. The dependence of Cu and SO3 contents and Cu/FeO, SO3/FeO ratios are to be interpreted as an indication of the common origin of Cu, Fe and S. In general, Cu, Zn, Pb and S content decrease with depth, whereas those of Fe3O4 increase. The variograms of the ore distributions are characterized by hole effect, trend and zonal anisotropy, which reflect alternation of ores with host rocks and changes in elemental contents. The Siirt Madenköy deposit is attributable to Cu and Zn ratios of the
Quasimonotone and Almost Increasing Sequences and Their New Applications
Hüseyin Bor
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/793548
Abstract: Recently, we have proved a main theorem dealing with the absolute Nörlund summability factors of infinite series by using -quasimonotone sequences. In this paper, we prove that result under weaker conditions. A new result has also been obtained.
Power Increasing Sequences and Their Some New Applications
Hüseyin Bor
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/436094
Abstract: In the work of Bor (2008), we have proved a result dealingwith summability factors by using a quasi--power increasing sequence. In this paper, we prove that result under less and more weaker conditions. Some new resultshave also been obtained.
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