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Usefulness of the epicardial fat tissue thickness as a diagnostic criterion for geriatric patients with metabolic syndrome

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Journal of Geriatric Cardiology 2015年第4期12卷 373-377页

作者： bema kaya Bedri Caner kaya Emel Yigit Karakas Sadettin Selcuk Baysal Dursun Cadirci Emre Erkus Ibrahim Halil Altiparmak Emin Savik Hatice Sezen Tttrgay Ulas Department of Internal Medicine Sanliurfa Training and Research Hospital Sanliurfa Turkey Department of Cardiology Sanliurfa Training and Research Hospital Sanliurfa Turkey Department of Internal Medicine Faculty of Medicine Harran University Sanliurfa Turkey Department of Family Medicine Faculty of Medicine Harran University Sanliurfa Turkey Department of Cardiology Faculty of Medicine Harran University Sanliurfa Turkey Department of Biochemistry Faculty of Medicine Harran University Sanliurfa Turkey

Objective To evaluate the epicardial fat tissue thickness （EFTT） as a diagnostic criterion for geriatric patients with metabolic syn- drome （MetS）. Methods Sixty geriatric patients over 65 years of age were recruited for the study. Patients were divided into two groups： Group 1 （n = 30） consisted of patients with MetS; Group 2 （n = 30） consisted of patients without MetS. Echocardiography was used to measure EFTT in all patients, and blood samples were analyzed for biochemical parameters. Results Compared to Group 2, EFTT levels of Group 1 were statistically higher （P 〈 0.05）. In a binary logistic regression analysis, EFTT levels served as the independent factor for meta- bolic syndrome 03 = 17.35, SE = 4.93, Wald = 12.36, P 〈 0.001）. Receivers operating characteristic Curve （ROC-curve） analysis revealed that EFTT predicted MetS with 96.7% sensitivity and 86.7% specificity above the level of 7.3 mm [area under the curve = 0.969; 95% con- fidence interval （CI）： 0.928-1.00]. Conclusions The present study demonstrated that serum EFTT levels were higher in geriatric patients with MetS and can therefore be used as a diagnostic criterion for MetS.

关键词： Epieardial fat tissue thickness Geriatrics Metabolic syndrome

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Paleoseismological trenching and seismic hazard assessment of the Bozkurt Segment of the Maymundağı Fault, Acıgöl Graben, SW Türkiye

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Journal of Mountain Science 2024年第11期21卷 3789-3813页

作者： Ali kaya Pamukkale University Faculty of EngineeringDepartment of Geological EngineeringDenizli 20160Türkiye

The Acıgöl Graben in SW Turkey,ca.50-55 km in length and 11-15 km in width,formed during the Miocene to Quaternary *** graben is bounded by active normal faults of MaymundağıFault(MF)to the northwest and the GemişFault Zone(GFZ)to the southeast that have triggered significant earthquakes,causing considerable *** study focuses on the Bozkurt segment of the MF,which caused a damaging earthquake(Mw 6.0)in 2019 and another significant earthquake in 1886 during historical times.A paleoseismological trench survey along the Bozkurt segment revealed at least two faulting events,with the last event producing a vertical displacement of 0.25 *** Optical Stimulated Luminescence(OSL)dating indicates that the last earthquake occurred 3.13±0.33 ka BP,while the penultimate earthquake occurred 4.0±0.72 ka *** dates correspond to a long-term slip rate of approximately 0.36±0.11 mm/a and a mean recurrence interval of 2.08 ka,short-term slip rate 0.78±0.16 mm/a and recurrence interval of 0.96 ka,and compatible with the mean sedimentation rate of 0.26 mm/a,calculated from drill logs in Acıgöl *** the 6 km length of the Bozkurt segment and its vertical displacement of 0.25 m in the last event,this segment has the potential to generate earthquakes ranging from 5.6 to 5.9 ***-term slip rates derived from geomorphological data are 0.56 mm/year to the north and 0.64 mm/a to the south of the graben,indicating higher subsidence on the southern *** rates are in accordance with the slip rates calculated from the paleoseismological trench survey and sedimentation rate from the *** indications show that the Bozkurt segment is an active Holocene fault with relatively long recurrence intervals and low-slip ***,the paleoseismological studies in combination with geomorphological data are important tool to assess seismic hazards and to define the characteristics of individual fault segments.

关键词： Paleoseismology Fault slip-rates Subsidence Bozkurt earthquake OSL dating Acıgöl Graben

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Aldol Condensation and Michael Addition of 4,4-Dimethyl- cyclohexane-l,3-dione and Aromatic Aldehydes, Unconventional Substituent Effects

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Chinese Journal of Chemistry 2011年第11期29卷 2355-2360页

作者： kaya, Muharrem Chemistry Department Faculty of Arts and Science Dumlupmar University 43100 Kutahya Turkey

By the cyclization of 4,4-dimethylcyclohexane-1,3-dione with different aromatic aldehydes, the xanthene regio- isomers were obtained. The diversity of xanthene isomers could be determined. The electronic and steric ef... 详细信息

关键词： aldol reaction Michael addition xanthene regioselectivity substituent effects X-ray diffraction

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Application of Adapted-Bubbles to the Helmholtz Equation with Large Wavenumbers in 2D

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Numerical Mathematics(Theory,Methods and Applications) 2023年第1期16卷 26-57页

作者： Adem kaya Institut füur Mathematik Universität PotsdamKarl-Liebknecht-Str.24-2514476 Potsdam/GolmGermany

An adapted-bubbles approach which is a modification of the residualfree bubbles(RFB)method,is proposed for the Helmholtz problem in 2D.A new two-level finite element method is introduced for the approximations of the bubble *** the other equations such as the advection-diffusion equation,RFB method when applied to the Helmholtz equation,does not depend on another stabilized method to obtain approximations to the solutions of the ***-bubbles(AB)are obtained by a simple modification of the *** modification increases the accuracy of the numerical solution *** provide numerical experiments with the AB method up to ch=5 where c is the wavenumber and h is the mesh *** tests show that the AB method is better by far than higher order methods available in the literature.

关键词： Helmholtz equation adapted-bubbles residual-free bubbles two-level finite element

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Dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method

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International Journal of Minerals,Metallurgy and Materials 2015年第11期22卷 1131-1140页

作者： Sait Kursunoglu Muammer kaya Department of Mining Engineering Eskisehir Osmangazi University

The dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method was investigated. The effects of the type of organic acid, acid concentration, leaching time, and leaching temperature on the lateritic nickel ore were examined. Organic acids were used individually prior to sequential leaching. Citric acid was more effective than the other two acids for the selective leaching of nickel and cobalt. An increase in the citric acid concentration negligibly affected the dissolution of the metals, whereas temperature exhibited a strong beneficial effect. Oxalic acid was determined to be the most appropriate organic acid for the second leaching step. After 8 h（4 h ＋ 4 h） of leaching with organic acids（0.5 M citric ＋ 0.5 M oxalic） in sequence at 90°C, 89.63% Ni, 82.89% Co, and 69.63% Fe were leached from the lateritic nickel ore. A sequential citric ＋ oxalic acid leaching method could represent a viable alternative for the dissolution of metals from lateritic nickel ore.

关键词： laterite leaching citric acid oxalic acid dissolution

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Mechanical properties of directionally solidified lead-antimony alloys

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International Journal of Minerals,Metallurgy and Materials 2011年第5期18卷 582-588页

作者： MevlüSahin Hasan kaya Department of Physics Faculty of Arts and SciencesNigde UniversityNigde 51200Turkey Department of Science Education Faculty of EducationErciyes UniversityKayseri 38039Turkey

The Pb-17wt% Sb alloy was directionally solidified under two solidification conditions：with different temperature gradients （G=0.93-3.67 K/mm） at a constant growth rate （V=17.50 λm/s） and with different growth rates （V=8.3-497 μm/s） at a constant temperature gradient （G=3.67 K/mm） in a Bridgman *** parameters,such as primary dendrite arm spacing （λ1）,secondary dendrite arm spacing （σ2）,and dendrite tip radius （R）,were *** microhardness （Hv） and ultimate tensile strength （λ） of the directional so-lidification samples were also *** influences of solidification and microstructure parameters on Hv and σwere *** results obtained in this work were compared with similar experimental researches in *** is shown that the Hv and σvalues increase with the increase of G and V,but decrease with the increase of λ1,λ2,and R.

关键词： lead-antimony alloy directional solidification microstructure mechanical properties

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Ionic liquid-based transparent membrane-coupled human lung epithelium-on-a-chip demonstrating PM0.5 pollution effect under breathing mechanostress

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Bio-Design and Manufacturing 2024年第5期7卷 624-636页

作者： Bilgesu kaya Ozlem Yesil-Celiktas Department of Bioengineering Faculty of EngineeringEge UniversityIzmir 35100Türkiye Translational Pulmonary Research Center(EgeSAM) Ege UniversityIzmir 35100Türkiye

The plausibility of human exposure to particulate matter(PM)has witnessed an increase within the last several *** of different sizes has been discovered in the atmosphere given the role of dust transport in weather and climate *** a regulator,the lung epithelium orchestrates the innate response to local ***,we developed a lung epithelium-ona-chip platform consisting of easily moldable polydimethylsiloxane layers along with a thin,flexible,and transparent ionic liquid-based poly(hydroxyethyl)methacrylate gel *** epithelium was formed through the culture of human lung epithelial cells(Calu-3)on this *** mechanical stress at the air–liquid interface during inhalation/exhalation was recapitulated using an Arduino-based servo motor system,which applied a uniaxial tensile strength from the two sides of the chip with 10%strain and a frequency of 0.2 ***,the administration of silica nanoparticles(PM0.5)with an average size of 463 nm to the on-chip platform under static,dynamic,and dynamic+mechanical stress(DMS)conditions demonstrated the effect of environmental pollutants on lung *** viability and release of lactate dehydrogenase were determined along with proinflammatory response through the quantification of tumor necrosis factor-α,which indicated alterations in the epithelium.

关键词： Ionic liquid-based membrane Lung Epithelial barrier Mechanostress Organ-on-chip Silica particles

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SYNTHESIS,CHARACTERIZATION,THERMAL DEGRADATION AND ELECTROCHEMICAL PROPERTIES OF OLIGO-4-m-TOLYLAZOMETHINEPHENOL

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Chinese Journal of Polymer Science 2006年第6期24卷 647-656页

作者： smet kaya Yasin Bayrakli Department of Chemistry Faculty of Sciences and Artsanakkale Onsekiz Mart UniversityTR-17020 anakkaleTurkey

The oxidative polycondensation reaction conditions of 4-m-tolylazomethinephenol （4-TAMP） in the presence of air O2 and NaOCl as oxidants were studied in an aqueous alkaline medium between 50 and 90℃. The structures of the obtained monomer and oligomer were confirmed by FT-IR, UV-Vis, ^1H- and ^13C-NMR and elemental analysis techniques. The physical characterization was made by TG-DTA, size exclusion chromatography （SEC） and solubility tests. At the optimum reaction conditions, the yield of oligo-4-m-tolylazomethinephenol （O-4-TAMP） was found to be 62.50% （for air O2 oxidant） and 90.0% （for NaOCl oxidant）, respectively. According to the SEC analysis, the number-average molecular weight （Mn）, weight-average molecular weight （Mw） and polydispersity index （PDI） values of O-4-TAMP were found to be 2310, 2610 g tool 1 and 1. 13, respectively, using air O2, and 1390, 1710 g mol^-1 and 1.23, using NaOCl, respectively. According to TG-DTA analyses, O-4-TAMP was more stable than 4-TAMP against thermal decomposition. The weight losses of 4-TAMP and O-4-TAMP were found to be 68% and 58% at 1000℃. Electrical conductivity of the O-4-TAMP was measured, showing that the polymer is a typical semiconductor. Electrochemically, the highest occupied molecular orbital （HOMO）, the lowest unoccupied molecular orbital （LUMO） and electrochemical energy gaps （E＇g） for 4-TAMP are -5.96, -3.22 and 2.74 eV, respectively. The HOMO, LUMO and （E＇g） for O-4-TAMP are -5.78, -3.44 and 2.34 eV, respectively. According to UV-Vis measurements, optical band gaps （Eg） of 4-TAMP and O-4-TAMP were found to be 3.45 and 3. 1 0 eV, respectively.

关键词： Air O2 NaOCl Oligo-4-m-tolylazomethinephenol Oxidative polycondensation Thermal analysis Band gap Conductivity

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SYNTHESIS, CHARACTERIZATION AND SOME PROPERTIES OF EPOXY RESINS CONTAINING AZOMETHINE BONDING

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Chinese Journal of Polymer Science 2013年第8期31卷 1087-1095页

作者： smet kaya Murat Gül anakkale Onsekiz Mart University Faculty of Sciences and Arts Department of Chemistry Polymer Research Laboratory

New epoxy resins were prepared from hydroxyl substituted Schiff base monomers in two steps. The first step is based on the synthesis of hydroxyl substituted Schiffbase monomers via condensation reaction. The second step includes the reaction between Schiff base monomers with cpichlorohydrine （EPC） to obtain epoxy resins. The structures of resulting compounds were confirmed by FTIR and H-NMR. TG-DTA and DSC measurements were made for thermal characterizations of the compounds. Chemical resistances of the cured epoxy-amine systems in acidic, alkaline and organic solvents were determined for coating applications. HC1 （aqueous solution, 10%）, NaOH （aqueous solution, 10%）, DMSO, DMF, N-methylpyrrolidone, ethanol, THF and acetone were used for corrosion tests. Chemical resistance data show that the synthesized resins have good chemical resistance against various acid, alkaline and common organic solvents.

关键词： Epoxy resin Thermal analysis Poly(imine)s.

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SYNTHESIS,CHARACTERIZATION,THERMAL DEGRADATION AND ELECTRICAL CONDUCTIVITY OF OLIGO[2-(2-HYDROXYPHENYLIMINOMETHYLBENZYLIDENE)AMINOPHENOL]AND OLIGOMER-METAL COMPLEXES

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Chinese Journal of Polymer Science 2008年第2期26卷 131-143页

作者： Ismet kaya Süleyman Çulhaoglu Department of Chemistry Faculty of Science and Arts Çanakkale Onsekiz Mart University TR 17020 Çanakkale Turkey

The oxidative polycondensation reaction conditions of 2-[(2-hydroxyphenyliminomethylbenzylidene)amino- phenol](2-HPIMBAP)has been accomplished by using air O_2 and NaOCl oxidants in an aqueous alkaline medium between 50-90℃.The optimum reaction conditions of the oxidative polycondensation and the main parameters of the process were *** the optimum reaction conditions,yield of the products were found to be 67.72% and 61.49% for air O_2 and NaOCl oxidants *** structures of the monomer ...

关键词： Air oxygen NaOCl Oligo[2-(2-hydroxyphenyliminomethylbenzylidene)aminophenol] Oxidative polycondensation Themal analysis Electrical conductivity Antibacterial activities.

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