Çanakkale Onsekiz Mart University is a Turkish public research university located in Çanakkale province and its surrounding towns. It is a member of the Balkan Universities Network, The European University Association , International Association of Universities and hosted the World Universities Congress 2010.The ÇOMÜ is listed among the world's top 1,000 best universities in the 2012 annual Scimago Institutions Rankings World Reports and one of the top innovative universities in Turkey The University was named as one of the top innovative Turkish universities in 2013 by the Turkish Ministry of Science, Industry and Technology.ÇOMÜ is a member of the European University Association, the International Association of the Universities and the Thrace Universities Union. Wikipedia.
Algi F.,Canakkale Onsekiz Mart University
Tetrahedron | Year: 2013
In order to reveal the effect of the donor units on the structure-property relationship, three novel directly linked donor-acceptor type systems, 1-3, which are based on thiophene and pyridine conjugates, are designed, synthesized and characterized by spectroscopic methods. It is noteworthy that these D-A systems exhibit distinct electrochemical and optical features depending on the strength of the D-unit or the conjugation length. Furthermore, it is found that two of these novel systems, 2 and 3, can be used in both chromogenic and fluorogenic detection of Cu2+ among other ions.© 2013 Elsevier Ltd. All rights reserved.
Baycan Koyuncu F.,Canakkale Onsekiz Mart University
Electrochimica Acta | Year: 2012
In this study, an ambipolar polymeric electrochromic material bearing naphthalene bisimide and carbazole derivative (NBIC) was synthesized and then directly polymerized onto ITO/glass surface via potentiodynamic electrochemical process. The electrochemical and optical properties revealed that the charge transfer from carbazole-donor to naphthalene bisimide-acceptor at the ground state. When the spectro-electrochemical properties of the polymer film were investigated, various colors were obtained due to ambipolar redox behavior at both cathodic and anodic regime. In the positive regime, the polymer film exhibits two reversible oxidation waves and transparent color of the film turned into green and then turquoise resulting from the association of polaronic and bipolaronic species from carbazolylium cation radicals. Besides, in the negative regime, transparent color of the film converted to reddish brown attributed to two electron stepwise reduction of the naphthalene bisimide moiety. Finally, the polymeric electrochrome exhibits multi-electrochromic behavior, reasonable redox stability, coloration efficiency and reasonable response time. © 2012 Elsevier Ltd. All rights reserved.
Karasulu B.,Canakkale Onsekiz Mart University
Applied Soft Computing Journal | Year: 2013
Flower identification and recognition are tedious and difficult tasks even for humans. Image segmentation based on automatic flower extraction is an essential step for computer-aided flower image recognition and retrieval processes. Furthermore, there is a challenge for segmentation of the object(s) from natural complex background in color images. In this study, a novel performance optimization approach for image segmentation, i.e. simulated annealing-based mean-shift segmentation (SAMS), is proposed and implemented. It is based on the simulated annealing solution of quadratic assignment problem model treated as an image segmentation process using feature-based mean-shift (MS) clustering on color images. The proposed approach is designed to realize a global and unsupervised (i.e., fully automatic) segmentation. It is a modified and optimized version of Backprojection-based mean-shift segmentation (BackMS) method. In conducted segmentation experiments, the performance results of SAMS approach are compared with the ones of BackMS method. Comparison of overall performance results and statistical analysis (i.e., Wilcoxon signed rank median test) show that SAMS approach improves the performance of BackMS method. It is measured as 49.33% when using object bounding boxes and as 51.33% when using object pixel regions. © 2013 Elsevier B.V. All rights reserved.
Sahiner N.,Canakkale Onsekiz Mart University
Progress in Polymer Science | Year: 2013
Hydrogels are important functional materials with a myriad of potential applications. As the chemically stable and interlocked polymeric network retains vast amounts of water without dissolving, the use of hydrogel matrices for preparation of metal nanoparticles in situ is feasible, and readily applicable in the catalysis of various aquatic and non-aquatic reactions. The functional groups in the hydrogel network can act as both chelating and capping agents for metal nanoparticle preparation from metal ions and for their stabilization; thus, the metal particles are protected from the atmosphere hindering the oxidation/deactivation and aggregation, allowing an increase in their stability and longevity. The functional groups binding ability in hydrogel matrices allow metal ions with different oxidation state such as Fe, Co, Ni, Cu, Ru, Au and so on, to be loaded into the hydrogel matrices. Then, these metal ions can be reduced/precipitated to their metallic particle forms inside hydrogels of different dimensions using green chemicals (those with no hazardous impact on the environment) or non-toxic chemical reducing agents such as NaBH4, H2, citrate, ethylene glycol, etc., depending upon the nature of the metal ions. The hydrogel-supported metal nanoparticles can be successfully used for the reduction of nitro compounds, hydrolysis of various hydrides and degradation of toxic species such as dyes, chlorohydrocarbons, pesticides, insecticides and so on. In this review, a flexible and highly adaptable platform for the design of soft and versatile interfaces with an outlook toward their use in material science, engineering and catalysis for in situ metal nanoparticle preparation within hydrogels for the catalysis purpose is addressed. In addition, even ex situ prepared metal nanoparticles can be readily incorporated within hydrogel matrices for various purposes are considered. The techniques outlined here afford robust hydrogel-metal composite systems with excellent control over size, composition and topography of the interfaces. Further directions from soft and flexible reactor of polymeric network at various dimensions, providing a continuously and environmentally workable milieu for designing and developing advanced technology are also addressed. © 2013 Elsevier Ltd. All rights reserved.
Sahiner N.,Canakkale Onsekiz Mart University
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2013
Polyethylene imine (PEI) particles were readily prepared via a simple microemulsion polymerization method using AOT as surfactant in commercially available gasoline with moderately high yield (~75%) depending on the MW of PEI. The aqueous solution of branched PEI crosslinked with divinyl sulfone (DVS), called c-PEI particles were in the size range of tens of nanometers to tens of micrometers and upon filtration the desired size range was readily obtained. The prepared c-PEI particles were highly positively charged depending on the used amounts of crosslinker and the extent of modifying agents such as alkyl halide for different purposes e.g., CH3I that can conveniently be used for the quaternization reaction. The prepared c-PEI particles were demonstrated to be very useful as antimicrobial materials, drug delivery materials, as a template for metal nanoparticle preparation, as a catalysis medium for the reduction of 4-nitrophenol (4-NP) to 4-amino phenol (4-AP), and for hydrogen generation from the hydrolysis of NaBH4. © 2013 Elsevier B.V.
Gurdal G.,Canakkale Onsekiz Mart University
International Journal of Coal Geology | Year: 2011
This study presents the concentrations and modes of occurrence of trace elements in 81 coal samples from the Çan basin of northwestern Turkey. The concentration of trace elements in coal were determined by inductively coupled plasma-mass spectrometry and inductively coupled plasma-atomic emission spectrometry. Additionally, traditional coal parameters were studied by proximate, ultimate, X-ray diffraction, and petrographic analyses. Twenty trace elements, including As, B, Ba, Be, Cd, Cu, Co, F, Hg, Mo, Ni, Pb, Sb, Se Sn, Th, Tl, U, V, and Zn, receive much attention due to their related environmental and human health concerns. The Çan coals investigated in this study are lignite to sub-bituminous coal, with a broad range of ash yields and sulphur contents. The trace element concentrations show variety within the coal seams in the basin, and the affinities vary among locations. The concentrations of B, Ba, Be, Cd, Cu, Co, F, Hg, Mo, Ni, Pb, Sb, Se, Sn, Tl, and Zn in Çan coals are within the Swaine's worldwide concentration range, with the exception of As, Th, U, and V. On the other hand, compared with world coals, the Çan basin coals have higher contents of As, B, Cu, Co, Mo, Pb, Th, U, V, and Zn. Based on statistical analyses, most of the trace elements, except for U, show an affinity to ash yield. Elements including As, Cd, Hg, Se, Cu, Mo, Ni, and Zn, show a possible association with pyrite; however, the elements Se, B, and Mo can be have both organic and inorganic associations. © 2011 Elsevier B.V.
Yigit O.,Canakkale Onsekiz Mart University
Ore Geology Reviews | Year: 2012
The Tethyan Metallogenic Belt (TMB), extending from Europe through Anatolia to Iran, is one of the world's major metal producing belts, and consists of many sectors. Mineral deposits of the Biga Peninsula in northwestern Turkey exhibit, in many ways, the characteristics of mineral deposits found throughout the belt. Biga Peninsula tectonically forms the westernmost part of the Sakarya Zone and easternmost part of the Rhodope Zone at the intersection of Gondwana and Laurasia. The Biga Peninsula metallogeny research and exploration project created a GIS inventory of mineral deposits and prospects, and classified them genetically to evaluate the mineral deposit potential using genetic models based on descriptive data. The GIS database, consisting of 128 deposits or prospects, helped to generate new prospects and potential prospects. This field-based study indicated that the Biga Peninsula forms a prime target for gold-copper exploration not only in Turkey but in the world. The current economically significant mineral deposits of the Biga Peninsula were shaped by Cenozoic calc-alkaline magmatism, ranging between 52 and 18. Ma, and related to mainly collisional and post-collisional tectonic regime. Epithermal Au-Ag deposits including high-(HS), low-(LS) and intermediate-sulfidation (IS) styles, porphyry Au-Cu-Mo and base-metal skarn systems are economically the most important. Though there are no currently economic examples of some of them in the Biga Peninsula, other deposit types include Carlin-like distal disseminated Au-Ag, orogenic Au, especially listwanite hosted, volcanogenic Mn and U, lateritic (ferricrete) Fe deposits, carbonate replacement (CR) and placers. Several active metal mines, such as Balya, Arapucandere and Koru, are operating in the Biga Peninsula. Kucukdere Au-Ag deposit in Balikesir is the only gold mine in the Biga Peninsula, except for by-product gold produced from base-metal deposits. Results of the study show current total gold endowment of the Biga Peninsula including reserves and/or resources is 9.18. Moz gold [284.2. t] contained in twelve different deposits. Of these only 6 contain significant gold [> 0.3 Moz or 10 t]. Halilaga porphyry and Agi Dagi and Kirazli HS epithermal systems have an ongoing resource estimate, and Halilaga is a candidate to be one of the largest Cu-Au deposits not only in the Biga Peninsula, but in Turkey. Currently newly discovered Tepeoba is the largest porphyry Cu-Mo-Au deposit with known resources in the Biga Peninsula.Here, the first 40Ar/ 39Ar step-heating age data conducted on some of the major HS epithermal gold deposits and causative intrusives in the Biga Peninsula are reported. Geochronological results from this project, evaluated with previous studies, indicate at least 3 phases of porphyry and 2 phases of high-sulfidation epithermal gold mineralization in the Biga Peninsula. The most important mineralizing phases and related host rocks for gold mineralization range from 38 to 22Ma. The Oligocene is especially important for economic epithermal and porphyry systems in the Biga Peninsula, which is comparable to deposits in the Oligo-Miocene Serbomacedonian-Rhodope metallogenic belt of the Balkan Peninsula in SE Europe. © 2012 Elsevier B.V.
Guseinov I.I.,Canakkale Onsekiz Mart University
Bulletin of the Chemical Society of Japan | Year: 2012
In standard convention, the new complete orthonormal sets of (a)-exponential type orbitals (a)-ETOs) are introduced as functions of the complex or real spherical harmonics and L(a)-modified and L(p)-generalized Laguerre polynomials (L(a)-MLPs and L(p)-GLPs), nlm (̃r)= 23=2e/x 2L nl (x)Slm L nl (x) n l 1 (2n)1 1=2 xlL(p)n/l/1(x) where, 0 < <, x = 2r, p = 2l + 2, = n + l + 1 and is the noninteger or integer (< 2 for) frictional quantum number (< < 3 for p ° ). It is shown that the origin of the (p)-ETOs, L(a)-MLPs and L(p)-GLPs is the self-frictional quantum forces which are analog of radiation damping or self-frictional forces introduced by Lorentz in classical electrodynamics. The relations for the quantum self-frictional potentials in terms of (p)-ETOs, L(p)-MLPs, and L(p)-GLPs, respectively, are established. We note that, in the case of disappearing frictional forces (for p = 1 and = Z/n), the (p)-ETOs and eigenvalue are reduced to the Schrödinger's results in nonstandard convention for the hydrogen-like atom and, therefore, the (p)-ETOs become the noncomplete, i.e., (1) nlm o nlm. Here, the nlm is Schrodinger's wave function in nonstandard convention. As examples of an application of (p)-ETOs as basis sets, the calculations have been performed for the total energies of some atomic and ionic systems. © 2012 The Chemical Society of Japan.
Sahiner N.,Canakkale Onsekiz Mart University |
Sagbas S.,Canakkale Onsekiz Mart University
Journal of Power Sources | Year: 2014
Novel poly(vinyl phosphonic acid) (p(VPA)) micro particle and composite p(VPA)-silica micro particle hydrogels are synthesized using a micro-emulsion polymerization technique. Porous p(VPA) particles are generated after removal of silica particles upon treatment of composite p(VPA) with 0.5 M NaOH solution. Bare, composite with silica, and porous p(VPA) micro particle hydrogels are used as templates and as reactors. Metal nanoparticles, Co, Ni, and Cu are generated in situ inside these hydrogels by chemical reduction of the absorbed metal ions with a reducing agent such as sodium boron hydride (NaBH4), and are used as catalyst in hydrogen production by hydrolysis of NaBH4 in a basic medium and ammonia borane (AB). The effects of reloaded metal ions, the reaction temperature, the porosity, the reusability, and the type of metal (Co, Ni, Cu) are investigated. The activation energy for hydrolysis of NaBH 4, and AB by p(VPA)-Co is 28.02 and 25.51 kJ mol-1, respectively. The mass susceptibility measurements of composite p(VPA)-Co microgel is found as ferromagnetic. It is found that p(VPA) microgels provided better catalytic performance in comparison to macro p(VPA) hydrogels due to improved properties such as higher surface area, pore structure, and inherently magnetic behavior after multiple loadings-reduction of Co(II) from aqueous medium. © 2013 Elsevier Ltd. All rights reserved.
Guseinov I.I.,Canakkale Onsekiz Mart University
Few-Body Systems | Year: 2013
By the use of complete orthonormal sets of ψ(α*)-exponential type orbitals (ψ(α*)-ETOs) with integer (for α* = α) and noninteger self-frictional quantum number α *(for α * ≠ α) in standard convention introduced by the author, the one-range addition theorems for χ-noninteger n Slater type orbitals (χ-NISTOs) are established. These orbitals are defined as follows (Formula presented.) where x = 2ζr, 0 < ζ < ∞, pl* = 2l + 2- α*, ql* = n + l + 1- α*, -∞ < α* < 3, -∞ < α ≤ 2,1 F1 is the confluent hypergeometric function and Slm(θ, φ) are the complex or real spherical harmonics. The origin of the ψ(α*)-ETOs, therefore, of the one-range addition theorems obtained in this work for χ-NISTOs is the self-frictional potential of the field produced by the particle itself. The obtained formulas can be useful especially in the electronic structure calculations of atoms, molecules and solids when Hartree-Fock-Roothan approximation is employed. © 2012 Springer-Verlag Wien.