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15 results on '"Say, Rıdvan"'

8. Mimicking receptor for methylmercury preconcentration based on ion-imprinting

Author

Büyüktiryaki, Sibel, Say, Rıdvan, Denizli, Adil, and Ersöz, Arzu

Subjects
*METHYLMERCURY, *SOLID phase extraction, *IMPRINTED polymers, *POLYMERIZATION
Abstract

Abstract: Solid-phase extraction (SPE) based on molecularly imprinted polymers (MIPs) were used to develop selective separation and preconcentration for methylmercury ion from complex matrixes. In this study, an ion-imprinting polymer was prepared to make artificial organomercury lyase preorganizing three methacryloyl-(l)-cysteine methylester (MAC) monomers and one methylmercury ion in a three-coordinate form by template polymerization, with the goal preparing a solid-phase which has the high selectivity for methylmercury ions. Methylmercury-imprinted beads were produced by a dispersion polymerization technique with use methylmercury–methacryloyl-(l)-cysteine (MM–MAC) complex monomer and ethylene glycoldimethacrylate (EDMA). After removal of methylmercury ions, methylmercury-imprinted beads were used for solid-phase extraction and determination of mercury compounds. Methylmercury adsorption and selectivity studies of methylmercury versus other metal ions which Hg(II), Zn(II), Pb(II) and Cd(II) were reported and distribution and selectivity coefficients of these ions with respect to methylmercury were calculated here. ICP-OES and HPLC-DAD determinations of methylmercury and mercury ions in the certified reference, LUTS-1 from the National Research Council of Canada and synthetic sea water showed that the interfering matrix had been almost removed during preconcentration. The methylmercury-imprinted solid-phase as mimic receptor was good enough for methylmercury determination in complex matrixes. [Copyright &y& Elsevier]

Published
2007
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9. Selective preconcentration of thorium in the presence of UO2 2+, Ce3+ and La3+ using Th(IV)-imprinted polymer

Author

Büyüktiryaki, Sibel, Say, Rıdvan, Ersöz, Arzu, Birlik, Ebru, and Denizli, Adil

Subjects
*IMPRINTED polymers, *INTERMEDIATES (Chemistry), *PROPERTIES of matter, *SOLUTION (Chemistry)
Abstract

Abstract: We have prepared Th(IV) ion-imprinted polymers, which can be used for the selective preconcentration of Th(IV) ions, represented by uranium and lanthanides. N-methacryloyl-(l)-glutamic acid (MAGA) was chosen as the complexing monomer. In the first step, Th(IV) was complexed with MAGA and the Th(IV)-imprinted poly[ethylene glycol dimethacrylate-N-methacryloyl-(l)-glutamic acid] (Poly(MAGA-EDMA)) beads were synthesized by suspension polymerization. After that, the template Th(IV) ions were removed using 8.0M HNO3 solution. The breakthrough capacity was 40.44mg Th(IV)/g beads. The relative selectivity coefficients of imprinted beads were 68, 97 and 116 for UO2 2+, La3+ and Ce3+, times greater than non-imprinted matrix, respectively. The Th(IV)-imprinted beads could be used many times without decreasing their breakthrough capacities significantly. [Copyright &y& Elsevier]

Published
2005
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10. Gold–silver-nanoclusters having cholic acid imprinted nanoshell

Author

Arzu Ersöz, Rıdvan Say, Aytaç Gültekin, Adil Denizli, Gültekin, Aytaç, Anadolu Üniversitesi, Fen Fakültesi, Fizik Bölümü, Ersöz, Arzu, Say, Rıdvan, TR34109, and KMÜ, Mühendislik Fakültesi, Enerji Sistemleri Mühendisliği Bölümü

Subjects
Silver, Metal Nanoparticles, Cholic Acid, Polymerization, Analytical Chemistry, Nanoclusters, Molecular Imprinting, chemistry.chemical_compound, Blood serum, Molecularly Imprinted Polymers, Monolayer, Polymer chemistry, Humans, Organic chemistry, Cysteine, Sulfhydryl Compounds, Cholic acid, Molecularly imprinted polymer, Gold–silver-nanoclusters, Photoluminesence, Nanoshell, Monomer, chemistry, Luminescent Measurements, Gold-Silver-Nanoclusters, Gold, Molecular imprinting
Abstract

WOS: 000303305700055, PubMed ID: 22483924, Molecular imprinted polymers (MIPs) as a recognition element for sensors are increasingly of interest and MIP-nanoparticles have started to appear in the literature. In this study, we have proposed a novel thiol ligand-capping method with polymerizable methacryloylamido-cysteine (MAC) attached to gold-silver-nanoclusters reminiscent of a self-assembled monolayer and have reconstructed surface shell by synthetic host polymers based on molecular imprinting method for cholic acid recognition. In this method, methacryloylamidohistidine-Pt(II)IMAH-Pt(II)] has used as a new metal-chelating monomer via metal coordination-chelation interactions and cholic acid. Nanoshell sensors with templates give a cavity that is selective for cholic acid. The cholic acid can simultaneously chelate to Pt(II) metal ion and fit into the shape-selective cavity. Thus, the interaction between Pt(II) ion and free coordination spheres has an effect on the binding ability of the gold-silver-nanoclusters nanosensor. The binding affinity of the cholic acid imprinted nanoparticles have investigated by using the Langmuir and Scatchard methods and determined affinity constant (K-affinity) has found to be 2.73 x 10(4) mol L-1 and 2.13 x 10(8) mol L-1. respectively. At the last step of this procedure, cholic acid level in blood serum and urine which belong to a healthy people were determined by the prepared gold-silver-nanoclusters

Published
2012

11. Gold–silver nanoclusters having dipicolinic acid imprinted nanoshell for Bacillus cereus spores recognition

Author

Rıdvan Say, Aytaç Gültekin, Adil Denizli, S. Emir Diltemiz, N. Yilmaz Sariozlu, Arzu Ersöz, Anadolu Üniversitesi, Fen Fakültesi, Fizik Bölümü, Emir Diltemiz, Sibel, Ersöz, Arzu, and Say, Rıdvan

Subjects
Dipicolinic Acid, Silver, Polymers, Stereochemistry, Bacillus Spores Recognition, Metal Nanoparticles, Analytical Chemistry, Nanoclusters, Molecular Imprinting, Metal, Gold-Silver Nanoclusters Sensor, chemistry.chemical_compound, Molecularly Imprinted Polymers, Bacillus cereus, Monolayer, Polymer chemistry, Picolinic Acids, Chelating Agents, Spores, Bacterial, Bacteriological Techniques, fungi, Molecularly imprinted polymer, Dipicolinic acid, Photoluminesence, Nanoshell, Monomer, chemistry, visual_art, visual_art.visual_art_medium, Gold, Molecular imprinting
Abstract

WOS: 000266055400019, PubMed ID: 19362197, Molecular imprinted polymers (MIPs) as a recognition element for sensors are increasingly of interest and MIP nanoclusters have started to appear in the literature. in this study, we have proposed a novel thiol ligand-capping method with polymerizable methacryloylamidocysteine (MAC) attached to gold-silver nanoclusters, reminiscent of a self-assembled monolayer and have reconstructed surface shell by synthetic host polymers based on molecular imprinting method for recognition. In this method, methacryloyl iminodiacetic acid-chrome (MAIDA-Cr(III)) has been used as a new metal-chelating monomer via metal coordination-chelation interactions and dipicolinic acid (DPA) which is a main participant of Bacillus spores has been used as a template. Nanoshell sensors with templates give a cavity that is selective for DPA. The DPA can simultaneously chelate to Cr(III) metal ion and fit into the shape-selective cavity. Thus, the interaction between Cr(III) ion and free coordination spheres has an effect on the binding ability of the gold-silver nanoclusters nanosensor. The binding affinity of the DPA imprinted nanoclusters has been investigated by using the Langmuir and Scatchard methods and determined affinity constants (K-affinity) were found as 18 x 10(6) mol L-1 and 9 x 10(6) mol L-1, respectively

Published
2009

12. Mimicking receptor for methylmercury preconcentration based on ion-imprinting

Author

Adil Denizli, Rıdvan Say, Sibel Büyüktiryaki, Arzu Ersöz, Anadolu Üniversitesi, Fen Fakültesi, Fizik Bölümü, Büyüktiryaki, Sibel, Say, Rıdvan, and Ersöz, Arzu

Subjects
Dispersion polymerization, Chromatography, Chemistry, Metal ions in aqueous solution, Molecularly imprinted polymer, chemistry.chemical_element, Mip, Analytical Chemistry, Mercury (element), chemistry.chemical_compound, Mimicking Receptor, Polymerization, Methylmercury Separation, Solid phase extraction, Preconcentration, Molecular imprinting, Methylmercury, Ion-Imprinting, Nuclear chemistry
Abstract

WOS: 000244369600029, PubMed ID: 19071362, Solid-phase extraction (SPE) based on molecularly imprinted polymers (MIPs) were used to develop selective separation and preconcentration for methylmercury ion from complex matrixes. In this study, an ion-imprinting polymer was prepared to make artificial organomercury lyase preorganizing three methacryloyl-(L)-Cysteine methylester (MAC) monomers and one methylmercury ion in a three-coordinate form by template polymerization, with the goal preparing a solid-phase which has the high selectivity for methylmercury ions. Methylmercury-imprinted beads were produced by a dispersion polymerization technique with use methylmercury-methacryloyl-(L)-cysteine (MM-MAC) complex monomer and ethylene glycoldimethacrylate (EDMA). After removal of methylmercury ions, methylmercury-imprinted beads were used for solid-phase extraction and determination of mercury compounds. Methylmercury adsorption and selectivity studies of methylmercury versus other metal ions which Hg(II), Zn(II), Pb(II) and Cd(II) were reported and distribution and selectivity coefficients of these ions with respect to methylmercury were calculated here. ICP-OES and HPLC-DAD determinations of methylmercury and mercury ions in the certified reference, LUTS-1 from the National Research Council of Canada and synthetic sea water showed that the interfering matrix had been almost removed during preconcentration. The methylmercury-imprinted solid-phase as mimic receptor was good enough for methylmercury determination in complex matrixes

Published
2007

13. Mutual recognition of TNT using antibodies polymeric shell having CdS

Author

Arzu Ersöz, Rıdvan Say, Filiz Yılmaz, Deniz Hür, Sibel Büyüktiryaki, Anadolu Üniversitesi, Fen Fakültesi, Kimya Bölümü, Say, Rıdvan, Büyüktiryaki, Sibel, Hür, Deniz, Yılmaz, Filiz, and Ersöz, Arzu

Subjects
Luminescence, Photochemistry, Polymers, Nanotechnology, Nanoconjugates, Conjugated system, Sulfides, Ruthenium, Analytical Chemistry, chemistry.chemical_compound, Qds, Tnt, Quantum Dots, Cadmium Compounds, Immunoglobulin Fragments, Bioconjugation, Aqueous solution, technology, industry, and agriculture, musculoskeletal system, Combinatorial chemistry, Monomer, Cross-Linking Reagents, chemistry, Quantum dot, Covalent bond, Click chemistry, Click Chemistry, Trinitrotoluene
Abstract

WOS: 000301627300015, PubMed ID: 22340123, Click chemistry is the latest strategy called upon in the development of state of the art exponents of bioconjugation. In this study, we have proposed a covalent and photosensitive crosslinking conjugation of the antibody on nano-structures. For this purpose, quantum dots (QDs) without affecting conformation and function of proteins through the ruthenium-chelate based aminoacid monomer linkages have been applied. The aminoacid-monomer linkages called ANADOLUCA (AmiNoAcid Decorated and Light Underpining Conjugation Approach) give reusable oriented and cross-linked anti 2,4,6-trinitrotoluene (TNT) conjugated QD for TNT detection. In this work, a new and simple method has improved to design and prepare high sensitive nanoconjugates for TNT determination. We have demonstrated the use of luminescent QDs conjugated to antibody for the specific detection of the explosive TNT in aqueous environments. The binding affinity of each nanoconjugates for TNT detection by using Langmuir adsorption methods has also been investigated

Published
2011

14. Quantum dot nanocrystals having guanosine imprinted nanoshell for DNA recognition

Author

Deniz Hür, Adil Denizli, Rıdvan Say, Arzu Ersöz, Sibel Büyüktiryaki, Sibel Emir Diltemiz, Anadolu Üniversitesi, Fen Fakültesi, Fizik Bölümü, Emir Diltemiz, Sibel, Say, Rıdvan, Büyüktiryaki, Sibel, Hür, Deniz, and Ersöz, Arzu

Subjects
Luminescence, Magnetic Resonance Spectroscopy, Stereochemistry, Guanine, Nanoparticle, Guanosine, Sulfides, Ligands, Analytical Chemistry, Substrate Specificity, Molecular Imprinting, chemistry.chemical_compound, Molecularly Imprinted Polymers, Microscopy, Electron, Transmission, Monolayer, Quantum Dots, Cadmium Compounds, Molecule, Cysteine, Sulfhydryl Compounds, Photoluminescence, Chelating Agents, Platinum, Deoxtribo Nucleic Acid (Dna) Recognition, Nanoshell Sensor, Molecularly imprinted polymer, DNA, Combinatorial chemistry, Nanoshell, chemistry, Molecular imprinting
Abstract

WOS: 000256208200004, PubMed ID: 18585161, Molecular imprinted polymers (MIPs) as a recognition element for sensors are increasingly of interest and MIP nanoparticles have started to appear in the literature. In this study, we have proposed a novel thiol ligand-capping method with polymerizable methacryloylamido-cysteine (MAC) attached to US quantum dots (QDs), reminiscent of a self-assembled monolayer and have reconstructed surface shell by synthetic host polymers based on molecular imprinting method for DNA recognition. In this method, methacryloylamidohistidine-platinium (MAH-Pt(II)) is used as a new metal-chelating monomer via metal coordination-chelation interactions and guanosine templates of DNA. Nanoshell sensors with guanosine templates give a cavity that is selective for guanosine and its analogues. The guanosine can simultaneously chelate to Pt(II) metal ion and fit into the shape-selective cavity. Thus, the interaction between Pt(II) ion and free coordination spheres has an effect on the binding ability of the US QD nanosensor. The binding affinity of the guanosine imprinted nanocrystals has investigated by using the Langmuir and Scatchard methods, and experiments have shown the shape-selective cavity formation with 06 and N7 of a guanosine nucleotide (K-a = 4.841 X 10(6) mol L-1) and a free guanine base (K-a = 0.894 x 10(6) mol L-1). Additionally, the guanosine template of the nanocrystals is more favored for single stranded DNA compared to double stranded DNA

Published
2007

15. Selective preconcentration of thorium in the presence of UO(2)(2+), Ce(3+) and La(3+) using Th(IV)-imprinted polymer.

Author

Büyüktiryaki S, Say R, Ersöz A, Birlik E, and Denizli A

Abstract

We have prepared Th(IV) ion-imprinted polymers, which can be used for the selective preconcentration of Th(IV) ions, represented by uranium and lanthanides. N-methacryloyl-(l)-glutamic acid (MAGA) was chosen as the complexing monomer. In the first step, Th(IV) was complexed with MAGA and the Th(IV)-imprinted poly[ethylene glycol dimethacrylate-N-methacryloyl-(l)-glutamic acid] (Poly(MAGA-EDMA)) beads were synthesized by suspension polymerization. After that, the template Th(IV) ions were removed using 8.0M HNO(3) solution. The breakthrough capacity was 40.44mg Th(IV)/g beads. The relative selectivity coefficients of imprinted beads were 68, 97 and 116 for UO(2)(2+), La(3+) and Ce(3+), times greater than non-imprinted matrix, respectively. The Th(IV)-imprinted beads could be used many times without decreasing their breakthrough capacities significantly.

Published
2005
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