Nuriye koçak | Necmettin Erbakan (original) (raw)

Papers by Nuriye koçak

Talanta, 2005

A chitosan resin derivatized with N-methyl-D-glucamine (CCTS-NMDG) was synthesized by using a cro... more A chitosan resin derivatized with N-methyl-D-glucamine (CCTS-NMDG) was synthesized by using a cross-linked chitosan (CCTS) as base material. The N-methyl-D-glucamine (NMDG) moiety was attached to the amino group of CCTS through the arm of chloromethyloxirane. The adsorption behavior of 59 elements on the synthesized resin was systematically examined by using the resin packed in a mini-column, passing water samples through it and measuring the adsorbed elements in eluates by ICP-MS. The CCTS-NMDG resin shows high ability in boron sorption with the capacity of 0.61 mmol ml-1 (= 2.1 mmol g-1). The sorption kinetics of this resin was faster than that of the commercially available resins. Other advantages of the synthesized resin are: (1) quantitative collection of boron at neutral pH regions, (2) complete removal of large amounts of matrices, (3) no loss of efficiency over prolonged usage, (4) effective collection of boron in wide range concentration using a mini column containing 1 ml resin, and (5) complete elution of boron with 1 mol l-1 nitric acid. The resin was applied to the collection/concentration of boron in water samples. Boron in tap water and river water was found to be in the range of 6 to 8 μg l-1. The LOD of boron after pretreatment with CCTS-NMDG resin and measurement by ICP-MS was 0.07 μg l-1 and the LOQ was 0.14 μg l-1 when the volume of each sample and eluent was 10 ml.

CCDC 1497303: Experimental Crystal Structure Determination

Asit-Baz Konusunda Karşılaşılan Kavram Yanılgıları: Bir İçerik Analizi

Necmettin Erbakan Üniversitesi Ahmet Keleşoğlu Eğitim Fakültesi dergisi, Mar 31, 2022

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DergiPark (Istanbul University), Mar 31, 2022

Asit-baz konusu günlük hayatın ve eğitim hayatının her kademesinde karşımıza çıkmakta ve içerdiği... more Asit-baz konusu günlük hayatın ve eğitim hayatının her kademesinde karşımıza çıkmakta ve içerdiği soyut kavramlar nedeniyle öğrencileri farklı anlamlar oluşturmaya yönlendirmektedir. Öğrencilerdeki bu farklı anlamlandırmalar sonucu oluşan kavram yanılgıları bilimsel bilgilerin yanlış ilerlemesine yol açmaktadır. Kavram yanılgılarını tespit edebilmek ve bu kavram yanılgılarını giderebilmek için çok sayıda araştırma yapılmıştır ve yapılmaktadır. Buradan yola çıkarak çalışmamızda asit-baz konusunda yapılan çalışmalar sonucunda tespit edilen kavram yanılgılarının gruplandırarak incelenmesi amaçlanmıştır. Bu çalışmalarda kavram yanılgılarının tespit edilme yöntemleri de ele alınarak bir sonraki çalışmalar adına kaynak oluşturması hedeflenmiştir. Çalışmada doküman inceleme yöntemi kullanılmıştır. Elde edilen veriler içerik analizi yöntemi kullanılarak analiz edilmiştir. Araştırma " Google Akademik " ve " Yükseköğretim Kurulu (YÖK)' nun Ulusal Tez Merkezi" veri tabanında bulunan çalışmalar ile sınırlandırılmıştır. Veri tabanlarından ulaşılan çalışmalar 1998-2020 yılları arasındaki çalışmaları içermektedir. Bu çalışmaların bir çoğu asit-baz konusunda kavram yanılgıları üzerinde dururken bir kısmı da çalışmada kullanılan yöntemler sonucu kavram yanılgılarına ulaşmışlardır. İncelenen araştırmalar sonucunda asit-baz konusunda mevcut kavram yanılgıları ve bu kavram yanılgılarının tespit edilme yöntem veya teknikleri ele alınmıştır. Taranan literatürde asit-baz konusuna yönelik bir çok alternatif kavrama ulaşılmıştır ve bu kavram yanılgıları yedi kategori kapsamında oluşturulmuştur.

CCDC 1529567: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Journal of Inorganic and Organometallic Polymers and Materials, Mar 9, 2012

This study investigated the potential use of a biologic polymer Lycopodium clavatum spores (Sporo... more This study investigated the potential use of a biologic polymer Lycopodium clavatum spores (Sporopollenin) for removal of vanadium ions (V(IV)) from aqueous solution. Three Schiff base derivative compounds immobilized sporopollenin were prepared and characterized. Immobilized sporopollenin was characterized via a scanning electron microscope, elemental analysis, infrared spectroscopy and thermal analysis techniques. The sorption capacities of the immobilized surfaces toward V(IV) ions were investigated by batch sorption experiments. V(IV) concentration, initial pH and the temperature effects were studied. The isotherm data of V(IV) ions were correlated reasonably well both Langmuir, Freundlich sorption isotherm. The thermodynamic studies showed that the V(IV) sorption onto immobilized sporopollenin derivatives is a spontaneous, endothermic and a chemical reaction.

Synthesis and Characterization of Sporopollenin-Supported Schiff Bases and Ruthenium(III) Sorption Studies

Journal of Inorganic and Organometallic Polymers and Materials, Sep 4, 2012

ABSTRACT Two Schiff base derivatives, (2-pycolylimino)benzen-1,4-diol and (2-pyridylimino)benzen-... more ABSTRACT Two Schiff base derivatives, (2-pycolylimino)benzen-1,4-diol and (2-pyridylimino)benzen-1,4-diol) were immobilized onto sporopollenin (Lycopodium clavatum) surfaces. The compounds were fully characterized by an infrared spectroscopy, elemental analysis, scanning electron microscopy, and X-ray diffraction techniques. The sorption capacities of the immobilized surfaces toward Ru(III) ions were investigated by batch sorption experiments. For the sorption experiment, the Ru(III) concentration, initial pH, and the temperature effects were studied. The isotherm data of Ru(III) ions were correlated reasonably well as a Freundlich sorption isotherm. The thermodynamic studies showed that the Ru(III) sorption onto immobilized sporopollenin derivatives is a non-spontaneous, endothermic and physical reaction.

Fen Bi̇li̇mleri̇ Öğretmenleri̇ni̇n Zamani Etki̇li̇ Kullanma Yeterli̇li̇kleri̇ne Yöneli̇k Görüşleri̇

Turkish Studies (Elektronik), 2017

Kimya eğitiminde animasyon kullanımı ve önemi

Synthesis and characterization of novel nano-chitosan Schiff base and use of lead (II) sensor

International Journal of Biological Macromolecules, Dec 1, 2012

A new kind of nano-chitosan Schiff base ligand (CHNS) with particle size of 34 nm was formed by t... more A new kind of nano-chitosan Schiff base ligand (CHNS) with particle size of 34 nm was formed by the reaction between the 2-amino groups of glucosamine residue of nano-chitosan and a 2,5-dihydroxybenzaldehyde. The chemical structures of the nano-chitosan and nano-chitosan Schiff base were characterized by FT-IR spectra, particle sizer, zeta potential, and elemental analysis. A new, simple and effective chemically modified carbon paste electrode with CHNS was prepared and used as a lead (II) sensor. The prepared electrode was characterized using scanning electronic microscopy (SEM-EDX) and cyclic voltammetry (CV). The modified electrode showed only one oxidation peak in the anodic scan at -0.34 V (vs. Ag/AgCl) for the oxidation of lead (II). The dedection limit (LOD) was calculated as 1.36×10(-7) for a 10-min preconcentration time at pH 6.0.

International Journal of Electrochemical Science, Feb 1, 2013

This paper describes the preparation and electrochemical application of a modified carbon paste e... more This paper describes the preparation and electrochemical application of a modified carbon paste electrode with a new kind of chitosan nanoparticle-Schiff base for the determination of Pb(II) ions in waste water using differential pulse anodic stripping voltammetry (DPASV). Firstly a new kind of chitosan nanoparticle-Schiff base (CNSB) was synthesized by chitosan nanoparticle reaction with 2,4dihydroxybenzaldehyde. CNSB structure was characterized by FT-IR spectroscopy, elemental analysis, particle size and zeta potential. Afterwards, a novel, simple and effective chemically modified carbon paste electrode with CNSB was prepared and characterized using scanning electronic microscopy (SEM-EDX) and anodic stripping voltammetry. The modified electrode showed only one oxidation peak in the anodic scan at-0.35 V (vs. Ag/AgCl) for the oxidation of Pb(II). The electrochemical properties and applications of the modified electrode, including the pH, supporting electrolyte, preconcentration time, reduction potential and time, and percentage of modifier were investigated. The best voltammetric response was observed for a paste composition of 73.7% (w/w) of graphite powder, 5.3% (w/w) of chitosan and 21% (w/w) of paraffin oil, with 0.2 mol L 1 NaAc solution at pH 6.0 as supporting electrolyte, preconcentration time of 600 s, a reduction potential of-0.1 V and reduction time of 10 s. The new electrode displays excellent response to Pb(II) which is linear in the range from 1×10-6 to 1×10-4 mol L 1 , with a correlation coefficient of 0.998 and a detection limit of 7.24×10-7 mol L 1 .

Materials Chemistry and Physics, Aug 1, 2017

* Graphene-based nanocomposite was prepared by the electron transfer and electrostatic interactio... more * Graphene-based nanocomposite was prepared by the electron transfer and electrostatic interaction of rGO and SiW *The nanocomposite has been characterized by FT-IR, XRD, Raman, and AFM. *The nanocomposite exhibits the catalytic activity for the degradation of methylene blue and rhodamine B.

Determining the Problems Experienced by Undergraduate Students in Digital Courses in the Distance Education Process

The Eurasia Proceedings of Educational and Social Sciences, Sep 24, 2022

Journal of education and training studies, Aug 26, 2019

In general chemistry laboratories of universities, faculty members and students work with chemica... more In general chemistry laboratories of universities, faculty members and students work with chemicals and devices and they are exposed to various risks. For this reason, it is of great importance whether teacher candidates are who are the teachers of future are adequately equipped in terms of laboratory safety or not. This study was conducted on teacher candidates who participated in General Chemistry Laboratory practices in Science Teacher Education program and their opinions and knowledge levels about laboratory safety were investigated. In the study, teacher candidates were informed about the necessary precautions while working in a general chemistry laboratory in 4 courses. Then, in order to increase the awareness and responsibility of the students via the information that taught in courses, the General Chemistry Laboratory Safety questionnaire form given in the appendix was applied. The questionnaire form developed for laboratory safety was applied to 81 teacher candidates. According to the results obtained from the study, it has been found out that teacher candidates mostly find the general chemistry laboratory safety important and understand the importance of information about safety. SPSS 13.0 was used to analyze the consequences of the survey.

Selçuk Üniversitesi fen fakültesi fen dergisi, May 7, 2007

Russian Journal of Coordination Chemistry, Sep 1, 2007

† The early studies reported on derivatives of monoglyoximes, diaminoglyoximes, heterocyclic vicd... more † The early studies reported on derivatives of monoglyoximes, diaminoglyoximes, heterocyclic vicdioximes, tetraoximes, and their some transition metal complexes [1-4]. In addition to cobaltoximes, which are regarded as vitamin B 12 model compounds [5, 6], the Schiff base complexes of cobalt and a number of tetranitrogen macrocycles also serve as good models [7-9]. The Co(III) complexes (cobaltoximes) readily undergo reduction with NaBH 4 to give blue Co(I) compounds, which are capable of binding various alkyl or aryl groups [10, 11]. The coordination chemistry of vicdioximes is interesting, and numerous transition metal complexes of these ligands have been investigated [8]. The exceptional stability and unique electronic properties of these complexes can be attributed to their planar structure stabilized by hydrogen bonding. Recently, several complexes of vic-dioximes and their derivatives are known to exhibit an anti-tumor activity for cancer researches. Another property of the vic-dioximes is the liquid crystalline character. Therefore, the aim of this study is to synthesize three new ligands, L 1 H • HCl, L 2 H • HCl, and L 3 H , by the reactions of 2-(aminomethyl)pyridine with isonitrosoacetophenone, p-methylisonitrosoacetophenone, and p-chloroisonitrosoacetophenone and to prepare their complexes with Ni 2+ , Co 2+ , and Cu 2+ ions. EXPERIMENTAL Elemental analyses were determined and 1 H NMR spectra were recorded on a Bruker GmbH Dpx-400 MHz high-performance digital FT-NMR spectrometer at the † Deceased. 1 The text was submitted by the authrs in English.

Bis-Schiff Base Derivatives of 2,5-Dihydroxybenzaldehyde: Synthesis, Characterization and Antimicrobial Activity of Their Cu(II), Co(II) and Zn(II) Complexes

Journal Of Macromolecular Science, Part A, 2013

Polyhedron, 2019

A novel organic-inorganic hybrid of 2,2'-bipyridyl (2,2'-bipy) linked covalently with the first i... more A novel organic-inorganic hybrid of 2,2'-bipyridyl (2,2'-bipy) linked covalently with the first inorganic framework based on boron-containing Keggin-type heteropolymolybdate anion [BMo 12 O 40 ] 5− has been hydrothermally synthesized in aqueous solution. The crystal structure was fully characterized by elemental analyses, single crystal X-ray diffraction, Fourier-transform infrared spectrum (FT-IR), powder X-ray diffraction (XRD), Ultravioletvisible spectroscopy (UV-Vis) and electron paramagnetic resonance (EPR) analysis. The catalytic performance of the synthesized catalyst was studied in degradation of methylene blue (MB) at ambient temperature. The catalyst exhibited excellent degradation against MB with a rate constant of 0.506/m, which was much higher than those by other polyoxometalate catalysts. Moreover, it was found to be easily separated from the reaction solution and recycled up to five times without significant loss of degradation activity.

Journal of Macromolecular Science, Part A, 2017

The metal complexes of Zn(II), Ni(II), Cu(II) and Pb(II) with asymmetrical Schiff bases were synt... more The metal complexes of Zn(II), Ni(II), Cu(II) and Pb(II) with asymmetrical Schiff bases were synthesized. The asymmetrical Schiff base was obtained through the condensation of 1,2-phenylenediamine, 4-methyl-1,2phenylenediamine, 2-hydroxy-1-napthaldehyde and biphenyl-4-carbaldehyde. The new Schiff base ligands (L 1 ' and L 2 ') and their metal complexes were characterized by TG/DTG, FT-IR, 1 H-NMR, UV-Vis, ESR, powder XRD, elemental analysis, magnetic moment and fluorescence studies. The powder XRD studies indicate that Co(II) and Cu(II) complexes are amorphous, while Ni(II) and Zn(II) complexes are crystalline. The anticarcinogenic effects of L 1 ' and L 2 ' were also investigated against colon (SW-620) and cervical cancer (HeLa) cell lines and compound L 2 ' was found to possess the highest anticarcinogenic potential, with 16.7 mM and 27.5 mM of IC 50 values for HeLa and SW620 cells, respectively.

Synthesis of Crosslinked Chitosan with Epichlorohydrin Possessing Two Novel Polymeric Ligands and Its Use in Metal Removal

Journal of Inorganic and Organometallic Polymers and Materials, 2010