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On Harmonic and Ev-Degree Molecular Topological Properties of DOX,RTOX and DSL Networks

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Computers, Materials & Continua 2019年第6期59卷 777-786页

作者： murat Cancan Faculty of Education Van YüzüncüYıl UniversityVan 65080Turkey

Topological indices enable to gather information for the underlying topology of chemical structures and *** harmonic indices have been defined *** degree based topological indices are defined by using the classical degree *** two novel degree concept have been defined in graph theory:ve-degree and ***-degree Zagreb indices have been defined by using ve-degree *** prediction power of the ve-degree Zagreb indices is stronger than the classical Zagreb *** oxide,silicate and oxygen networks are important network models in view of chemistry,physics and information *** and mathematical properties of dominating oxide,silicate and oxygen networks have been considerably studied in graph theory and network *** properties of the dominating oxide,silicate and oxygen networks have been intensively investigated for the last few years *** this study we examined,the first,the fifth harmonic and ev-degree topological indices of dominating oxide(DOX),regular triangulene oxide network(RTOX)and dominating silicate network(DSL).

关键词： Dominating oxide network dominating silicate network ev-degree topological indices harmonic indices regular triangulene oxide network

Chromium Substitution Effect on the Magnetic Structure of Iron Oxides

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Chinese Physics Letters 2012年第5期29卷 217-220页

作者： Osman murat Ozkendir Mersin University Tarsus Technical Faculty of EducationTarsusTurkey UVSOR FacilityInstitute for Molecular ScienceOkazaki 444-8585Japan

The local magnetic and electronic structures of chromium substituted iron oxide polycrystalline samples are investigated via Fe L-edge x-ray absorption near-edge structural and magnetic circular dichroism measurements.A strong dependence of atomic magnetic levels on the applied external magnetic field is *** magnetic behavior of Cr-doped iron oxides are determined to be dominantly governed by the d-d hybridization between Fe and Cr valence *** addition,the formation of CrO_(2) and Cr_(2)O_(3) chromium oxide clusters in the sample are observed to determine the magnetic ordering,***-ferromagnetic or ferromagnetic with the changing external magnetic *** results highly agree with the previous studies.

关键词： chromium ferromagnetic magnetic

Anisian(Middle Triassic)Conodonts of the Kocaeli Triassic,Western Turkey

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Journal of Earth Science 2021年第3期32卷 616-632页

作者： Ali murat Kilic Department of Geological Engineering Faculty of EngineeringBalikesir UniversityBalikesirTurkey

The present study of Anisian(Middle Triassic)conodonts from the Kocaeli Peninsula(western Turkey)encompasses over 10 species of the families Gondolellidae and Gladigondolellidae,providing Early and Middle Triassic time constraints,Chiosella timorensis(Nogami,1968);Cornudina oezdemirae Gedik,1975;Gladigondolella tethydis(Huckriede,1958);Neostrachanognathus tahoensis Koike,1998;Paragondolella aegaea(Bender,1970);Paragondolella bulgarica Budurov and Stefanov,1975;Nicoraella kockeli(Tatge,1956);***(Sudar and Budurov,1979),and Gladigondolella *** established are Paragondolella hirschii *** and Budurov;*** *** ,Budurov,Petrunova and Mirauta;and *** ***.K?l??.The Kocaeli Anisian conodonts show a faunal affinity with *** present Anisian fauna is characteristic of the *** strong homeomorphy that characterizes the Anisian in western North America is discussed.

关键词： Triassic Anisian Aegean Bithynian conodonta Gebze(Kocaeli)

Synthesis, Spectral Analysis and Antimicrobial Activity of New Pd (Ⅱ) Complexes Involving 5,6-Dimethylbenzimidazole

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Chemical Research in Chinese Universities 2023年第6期39卷 968-975页

作者： murat TÜRKYILMAZ murat DÖNMEZ Özlen ALTUN Department of Chemistry Trakya University22030 EdirneTurkey

In this study,firstly,3-bromopropanenitrile(2a),ethyl bromoacetate(2b),and 2-bromoethan-1-amine(2c)were added to 5,6-dimethylbenzimidazole(1)and symmetrically-connected N-heterocyclic carbenes(NHC)[(3a-3c)]were ***,the NHC precursor compounds were reacted with PdCl2 and Pd(Ⅱ)-NHC complexes[(4a—4c)]were *** synthesized NHC precursors(3a-3c)and Pd(Ⅱ)-NHC complexes(4a—4c)were characterized by different spectroscopic *** antibacterial activities of these products were measured against bacteria and fungus with the disc diffusion ***(Ⅱ)-NHC complexes had higher antibacterial activity than the NHC *** synthesized compounds showed antimicrobial activity with different properties from each *** vitro biological activities of salts and metal complexes on selected bacteria were determined by the broth dilution method based on Clinical and Laboratory Standards Institute guidelines.1,3-Bis-(2-hydroxyethyl)imidazolinium bromide and 3-(2-ethoxy-2-oxoethyl)-1-(3-aminopropyl)-^(1)H-imidazole-3-ium bromide had activity against Escherichia coli.

关键词： N-Heterocyclic carbene Palladium(Ⅱ)-NHC complex Structural analysis Antimicrobial activity

Transient Temperature Analysis for Industrial AC Arc Furnace Bottom

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Journal of Iron and Steel Research International 2004年第6期11卷 1-4页

作者： ■ murat Tun Development Bank of Turkey Ankara 06100Turkey Yeditepe University Istanbul 81120Turkey

Heat losses from the furnaces depend on the design and size. The surface heat loss from the bottom of an industrial AC electric arc furnace (EAF) possesses an important fraction of overall losses. So in this study the transient temperature variation at the bottom of the EAF was investigated. The transient temperature analysis was carried out using MATLAB computer program. T=T(r, t) for different bottom lining layers was depicted.

关键词： electric arc furnace steel production industrial system transient temperature analysis

Plume diagnostics of BUSTLab microwave electrothermal thruster using Langmuir and Faraday probes

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Plasma Science and Technology 2019年第4期21卷 145-154页

作者： M Serhan YILDIZ murat CELIK Turkish Air Force Academy.Istanbul 34149.Turkey Bogazici University Islanbul 34342Turkey

This study presents the Langmuir and Faraday probe measurements conducted to determine the plume characteristics of the BUSTLab microwave electrothermal thruster(MET).The thruster,designed to operate at 2.45 GHz frequency,is run with helium,argon and nitrogen gases as the *** the measurements,the propellant volume flow rate and the delivered microwave power levels are *** with nitrogen gas revealed certain operation regimes where a very luminous plume is *** the use of in-house-built Langmuir probes and a Faraday probe with guard ring,thruster plume electron temperature,plasma density and ion current density values are measured,and the results are *** measurements show that MET thruster plume effects on spacecraft will likely be similar to those of the arcjet *** is observed that the measured plume ion flux levels are very low for the high volume flow rates used for the operation of this thruster.

关键词： microwave electrothermal thruster plasma diagnostics plume plasma faraday probe

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.

Axial gas mixing in conical spouted beds with high density particles

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Particuology 2023年第10期81卷 45-57页

作者： Neslin Dogan murat Koksal Gorkem Kulah Department of Chemical Engineering Middle East Technical UniversityAnkaraTurkey Department of Mechanical Engineering Hacettepe UniversityBeytepeAnkaraTurkey

Conical spouted beds operating with high-density particles(ρp>2500 kg/m^(3))have recently gained attention because of their potential use as nuclear fuel coaters for next-generation nuclear *** the literature,the number of axial gas mixing studies in conical and conical-cylindrical spouted beds is very limited and all axial mixing studies were carried out with relatively light particles(ρp≤2500 kg/m^(3)).Therefore,the objective of this study was to generate experimental data that can be used to explain the gas axial mixing behavior in conical spouted beds operating with both low-and high-density *** were conducted in two(γ=30°,60°)conical spouted beds with three different types of particles:zirconia(ρp=6050 kg/m^(3)),zirconia toughened alumina(ρp=3700 kg/m^(3))and glass beads(ρp=2460 kg/m^(3)).In order to be able to compare experimental data obtained at different conditions,a 1-D convection-diffusion gas mixing model originally developed by San Joséet al.(1995)was implemented to determine the axial dispersion *** results show that the axial dispersion coefficients range between m^(2)/s and m^(2)/s,increase with superficial gas velocity and are higher than the corresponding dispersion coefficients of fixed beds,lower than the dispersion coefficients of fluidized beds and in the same range with the cylindrical spouted beds reported in the *** corresponding Peclet numbers were in the range of 0.6–7.8 for all operating conditions and slightly higher Peclet numbers were obtained with glass beads indicating the relative importance of gas convective transport over gas dispersion for light particles compared to heavy particles.

关键词： Conical spouted bed Gas dispersion coefficient Axial gas mixing High-density particles

Heat Transfer Analysis for Industrial AC Electric Arc Furnace

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Journal of Iron and Steel Research International 2005年第4期12卷 9-16页

作者： ünal  amdali murat Tun Development Bank of Turkey Ankara 06100 TurkeyYeditepe University Istanbul 81120 Turkey

The heat transfer analysis was performed for an AC electric arc furnace (EAF). Heat losses by conduction, convection and radiation from outer surface, roof, bottom and electrodes of EAF were determined in detail. Some... 详细信息

关键词： electric arc furnace (EAF) heat analysis industrial furnace