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Anadolu Üniversitesi'nin temeli, 1958 yılında kurulan Eskişehir İktisadi ve Ticari İlimler Akademisi'ne dayanır. 1982 yılında YÖK kanunu ile birlikte EİTİA, Anadolu Üniversitesi'ne dönüşmüştür.
Anadolu University is a public university in Eskişehir, Turkey and the fourth largest university in the world by enrollment.
More information: http://en.wikipedia.org/wiki/Anadolu_University
SYNTHESIS AND THE SPECTRAL INVESTIGATIONS OF N-PYRIDINYL-SPIRO-PHOSPHAZENES
SYNTHESIS AND THE SPECTRAL INVESTIGATIONS OF N-PYRIDINYL-SPIRO-PHOSPHAZENESHakan Dala, Yasemin Süzena, Zeynel Kılıçb and Tuncer Hökelekc a Department of Chemistry, Faculty of Science, Anadolu University, 26470 Yenibağlar, Eskişehir, TURKEY b Department of Chemistry, Faculty of Science, Ankara University, 06100 Tandoğan, Ankara, TURKEY c Department of Physics, Hacettepe University, 06800 Beytepe, Ankara, TURKEY Abstract The condensation reactions of N-(2-hydroxyphenylmethyl)amino-methylpyridines (4-6) with trimer, N3P3Cl6, afford partially substitued novel spiro-cyclic phosphazene derivatives (7-9). The fully substitued phosphazenes (10 and 11) have also been obtained from the reactions of (9) with the excess of pyrrolidine and morpholine. The solid state structure of (8) has been determined by X-ray crystallography. The spectral investigations of all the compounds have been made by FT-IR, 1H-,13C-, 31P-NMR, HETCOR and MS. Introduction Cyclophosphazenes are an important family of inorganic ring systems, which traditionally have attracted attention for two main reasons: (i) to obtain small molecules of phosphazen derivatives, (ii) and to produce polymeric phosphazene derivatives . They also play an important role in the chemistry of heteroatom compounds. In resent years, phosphazene polymers have attracted considerable attention because they can be tailored to possess a wide variety of physical and chemical properties by changing the side groups [1]. The coordination chemistry of the various multi-site ligands derived from cyclophosphazenes... |
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Abstract The presence of motile Aeromonas species in drinking water, the Porsuk River and tap water in the Eskisehir (Turkey) was investigated. Fresh water samples were collected from 12 different sites of Porsuk River (Eskisehir,Turkey) and 12 drinking water and tap water sources in various parts of the city during all year. Aeromonas spp. was not detected in drinking and tap waters but was found in the Porsuk River. The Porsuk River isolates were 13% Aeromonas hydrophyla, 37% Aeromonas caviae, 35% Pseudomonas putida, and 15% Comomonas acidovorans. Keywords Aeromonas spp, drinking water, river water, tap water.
Abstract The presence of motile Aeromonas species in drinking water, the Porsuk River and tap water in the Eskisehir (Turkey) was investigated. Fresh water samples were collected from 12 different sites of Porsuk River (Eskisehir,Turkey) and 12 drinking water and tap water sources in various parts of the city during all year. Aeromonas spp. was not detected in drinking and tap waters but was found in the Porsuk River. The Porsuk River isolates were 13% Aeromonas hydrophyla, 37% Aeromonas caviae, 35% Pseudomonas putida, and 15% Comomonas acidovorans. Keywords Aeromonas spp, drinking water, river water, tap water.The occurrence of Aeromonas in Drinking Water, Tap Water and the Porsuk River M. Kıvanç, M. Yılmaz, F. Demir Anadolu University, Science Faculty, Department of Biology, Eskişehir, TURKEY (E-Mail: mkivanc@anadolu.edu.tr; meralyilmaz@anadolu.edu.tr) Introduction Aeromonas are Gram-negative, oxidase-positive, facultative anaerobic, glucose fermenting, rod-shaped bacteria of the family Aeromonadaceae (Popoff, 1984). Aeromonas spp. are common aquatic microorganisms that occur in different water (Kaper et al., 1981; Gavriel et al., 1998; Fiorentini et al.1998; Soler et al., 2002). Many Aeromonas species have been associated with human diseases, including gastroenteritis, hemolytic-uremic syndrome, septicemia, etc.(Janda and Abbott,1996). Residents of the City of Eskisehir in Turkey use treated water from the Porsuk River not for drinking but for cleaning, washing, and various recreational purposes as tap water. Lack of information about the incidence of motile Aeromonas in Eskisehir tap water, drinking water and the Porsuk River should be great concern because their possible occurrence in such waters could be a potential source of infection in the residents. In this study, the existence of Aeromonas species in the Porsuk River, tap water obtained from the Porsuk River after treatment, and drinking water were determined in the City of Eskisehir. Materials and methods Collection of water samples The study was undertaken in 12 stations, monthly sample... |
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PRODUCING POROUS SILICON NITRIDE FROM a β-Sİ3N4 POWDER G.Topates, F. Kara and H. Mandal Anadolu University, Department of Materials Science and Engineering, Eskişehir-TURKEY
Increasing requirements from porous materials make Si3N4 ceramics one of the important candidates owing to their better mechanical and thermal properties. Different processes have been used for producing porous Si3N4 including nitridation of metal Si powder and carbothermal reduction and nitridation of SiO2. Sintering additives have an important role for growth of Si3N4 grains and pore evolution. In this study, porous Si3N4 ceramics were produced from β-Si3N4 powder and SiO2/C mixtures
PRODUCING POROUS SILICON NITRIDE FROM a β-Sİ3N4 POWDER G.Topates, F. Kara and H. Mandal Anadolu University, Department of Materials Science and Engineering, Eskişehir-TURKEY Increasing requirements from porous materials make Si3N4 ceramics one of the important candidates owing to their better mechanical and thermal properties. Different processes have been used for producing porous Si3N4 including nitridation of metal Si powder and carbothermal reduction and nitridation of SiO2. Sintering additives have an important role for growth of Si3N4 grains and pore evolution. In this study, porous Si3N4 ceramics were produced from β-Si3N4 powder and SiO2/C mixturesINTRODUCTION EXPERIMENTAL PROCEDURE Drying-Binder Addition-Sieving (7.5 wt % PEG1500)(-250 µm) Milling (Planetary Ball Mill-90min.-2-propanole) Pressureless Sintering (1700oC-1h.-Nitrogen atm.) Binder Burn-out (550oC- 1 h., Argon) Heat Treatment (1500oC- 4h.-Nitrogen atm.) Characterization (Phase, Microstructure) Pressing (Uniaxially, 10 MPa) Si3N4 /10.07 µm Quartz /3.75 µm Precipitated Silica /25-162 nm C-black /1.3 µm Y2O3 PHASE DEVELOPMENT Little amount of coesite (one of the forms of silica) is present in SG with -Si3N4 after heat treatment and sintering. Formation of Y2SiO5 and -Y2Si2O7 after heat treatment for SG-y. After sintering, these phases transformed to Y2Si3O3N4 CONCLUSIONS RESULTS MICROSTRUCTURAL DEVELOPMENT Higher weight loss values obtained for SG because of unreacted C and production of SiO gas after reduction and nitridation of SiO2. Addition of Y2O3 eases reduction and nitridation of SiO2 and reducing weight loss values achived. Higher shrinkage obtained for SA after heat treatment. Minus shrinkage values for SA and SA-y after sintering can be explained by grain growth of β-Si3N4 particles. Higher open porosity for SA due to low green density. Obtained open porosities 52.78 wt.% for SG and 60.56 wt.% for SA after sintering. Wide grain size distribution due to starting -Si3N4 powder. Particles has different shape from spherical to columnar. Finer silica source has more elongated particles compare to coarse silic... |
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Link Layer: Motivation
Link Layer: MotivationMessage M A B Problem: Given a message M at a node A consisting of several packets, how do you send the packets to a “neighbor” node B Neighbor: A node attached to the same link Link can be point-to-point or broadcast Link can be guided media (a copper, coax, fiber wire) or unguided media (wireless) |
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Lecture 2: Propositional Equivalences
Lecture 2: Propositional Equivalences |
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Input/Output
Input/OutputTwo main jobs of a computer are Processing Compute an answer – matrix multiplication, FFT OS must control the central processing unit, the CPU Process management (creation/termination), process scheduling, process synchronization, memory management Input/Output (I/O) Get user input from the keyboard -- Keyboard Display the chars that the user types on the screen -- Display Read/Save a file from/to the disk – Floppy, hard disk, CD-ROM Download a Web page using the Web Browser – Network Card (NIC) … OS must control all I/O devices Done by the I/O subsystem of the OS |
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Development and Validation of a Tool for Measuring Indicators of Information and Communication Technologies (ICTs) at a Turkish State University
Yavuz Akbulut
Prof. Dr. Mehmet Kesim
Anadolu University
Eskişehir, Turkey
yavuzakbulut@anadolu.edu.tr
mkesim@anadolu.edu.tr
Development and Validation of a Tool for Measuring Indicators of Information and Communication Technologies (ICTs) at a Turkish State University Yavuz Akbulut Prof. Dr. Mehmet Kesim Anadolu University Eskişehir, Turkey yavuzakbulut@anadolu.edu.tr mkesim@anadolu.edu.tr |
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ANADOLU ÜNİVERSİTESİ MÜHENDİSLİK MİMARLIK FAKÜLTESİ MALZEME BİLİMİ VE MÜHENDİSLİĞİ BÖLÜMÜ STAJ SÜRECİ “All things you want to know but you afraid to ask”
16 Mart 2009 Pazartesi, Saat: 12:00-13:00
Yrd. Doç. Dr. İrfan TÖRE
ANADOLU ÜNİVERSİTESİ MÜHENDİSLİK MİMARLIK FAKÜLTESİ MALZEME BİLİMİ VE MÜHENDİSLİĞİ BÖLÜMÜ STAJ SÜRECİ “All things you want to know but you afraid to ask” 16 Mart 2009 Pazartesi, Saat: 12:00-13:00 Yrd. Doç. Dr. İrfan TÖRE |
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