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A New Method In The Synthesis Of Conductive Polymers; Synthesis, Characterization, And Investigation Of Photocatalytic Properties Of Polyaniline, Muzaffer Can
Turkish Journal of Chemistry
As known, in the synthesis of conductive polyaniline polymer from aniline monomer, the polymerization medium must be acidic. In order to make the polymerization medium acidic, protonic acids such as HCl and H2SO4 are generally used. In this study, two acids have been used to make the polymerization medium acidic. One of them, as we know, is H2SO4 as a protonic acid. The other acid is the zinc ion, which is a Lewis acid. The metal ion has never been used for this purpose up to now. Two polyaniline polymers have been synthesized to prove that conductive polymers can also …
Synthesis Of Copper Nano/Microparticles Via Thermal Decomposition And Their Conversion To Copper Oxide Film, Çağdaş Allahverdi̇
Synthesis Of Copper Nano/Microparticles Via Thermal Decomposition And Their Conversion To Copper Oxide Film, Çağdaş Allahverdi̇
Turkish Journal of Chemistry
Copper nano/microparticles were synthesized in octadecene at 290 °C by thermal decomposition method. Copper acetate monohydrate, stearic acid, and 1-octadecanol were used as copper precursor, capping and mild reducing agents, respectively, at the synthesis. Borosilicate glass substrates submerged into the reaction solution during the synthesis were coated by copper nano/ microparticles. Thermal decomposition and coating techniques were combined in this study. Copper nano/microparticles were thoroughly characterised via X-ray powder diffraction, X-ray photoelectron, Raman, and attenuated total reflectance-Fourier transform infrared spectroscopies, and scanning and transmission electron microscopies. The average minimum Feret?s diameter of these synthesized copper particles was measured as ~87 …
Theoretical Investigation Of Steric Effects On The S1 Potential Energy Surface Of O-Carborane-Anthracene Derivatives, Fahri̇ Alkan
Theoretical Investigation Of Steric Effects On The S1 Potential Energy Surface Of O-Carborane-Anthracene Derivatives, Fahri̇ Alkan
Turkish Journal of Chemistry
TDDFT scan calculations were performed for s-carborane-anthracene derivatives (o-CB-X-Ant where X=-H, -CH3, -C2H5 and tert-butyl or -tBu) in order to understand the interplay between the steric effects, S1 potential energy surface (PES) and photophysical properties. The results show that all systems exhibit three local minima on the S1 PES, which correspond to the emissive LE and TICT state, along with the nonemissive CT state respectively. In the case of the unsubstituted system (o-CB-H-Ant), and -CH3 and -C2H5 substituted cases, S1 PES is predicted to be quite flat for certain conformations indicating that it is possible for these systems to reach …
Effect Of Carbon Fiber Reinforcement On Dimensional Variations Of 3d Printed Polyamide-6 Composites: A Simulation Study, Ans Al Rashid, Hamid Ikram, Muammer Koç
Effect Of Carbon Fiber Reinforcement On Dimensional Variations Of 3d Printed Polyamide-6 Composites: A Simulation Study, Ans Al Rashid, Hamid Ikram, Muammer Koç
Turkish Journal of Chemistry
Due to material design and fabrication flexibility, additive manufacturing (AM) or 3D printing (3DP) processes and polymer composites have paved their way into several industrial sectors. The quality of 3D printed polymer composites is highly dependent on the reinforcement content of polymers and 3DP process parameters. Several experimental studies are performed to optimize the reinforcement contents and process parameters; however, exploring the numerical modeling and simulation techniques is vital to lower the research and development costs. In the study, the numerical simulations for the 3DP process were performed using Digimat® software for carbon fiber-reinforced polyamide-6 (PA6) composites fabricated via the …
Synthesis Of Pyridinium-Based Ionic Liquids And Their Application To Improve Candida Rugosa Lipase Stability In A Methanol-Water Solvent System, Oktavianus Cipta, Anita Alni, Rukman Hertadi
Synthesis Of Pyridinium-Based Ionic Liquids And Their Application To Improve Candida Rugosa Lipase Stability In A Methanol-Water Solvent System, Oktavianus Cipta, Anita Alni, Rukman Hertadi
Turkish Journal of Chemistry
This paper studied the effect of pyridinium-based ionic liquids as cosolvents in a methanol-water solvent system on the hydrolytic activity of Candida rugosa lipase. These ionic liquids were successfully synthesized using imidazolium-based ionic liquid synthesizing methods with a certain adjustment. The hydrolytic activity of Candida rugosa lipase was analyzed using 4-nitrophenol acetate (pNPA) and 4-nitrophenol palmitate (pNPP) as substrates. The addition of ionic liquids had no significant effect on the hydrolytic activity of lipase in a water solvent, and it had a greater effect in methanol. The addition of [C6Py] Br ionic liquid as a methanol cosolvent (methanol: ionic liquid, …
Sars-Cov-2 Main Protease Targeting Potent Fluorescent Inhibitors: Repurposing Thioxanthones, Gönül Saadet Batibay, Eyüp Meti̇n
Sars-Cov-2 Main Protease Targeting Potent Fluorescent Inhibitors: Repurposing Thioxanthones, Gönül Saadet Batibay, Eyüp Meti̇n
Turkish Journal of Chemistry
The coronavirus disease, COVID-19, is the major focus of the whole world due to insufficient treatment options. It has spread all around the world and is responsible for the death of numerous human beings. The future consequences for the disease survivors are still unknown. Hence, all contributions to understand the disease and effectively inhibit the effects of the disease have great importance. In this study, different thioxanthone based molecules, which are known to be fluorescent compounds, were selectively chosen to study if they can inhibit the main protease of SARS-CoV-2 using various computational tools. All candidate ligands were optimized, molecular …
Structural And Dielectrical Behavior Of Polypyrrole/Huntite Composites, Zeynep Türk, Nazlican Şahi̇n, Seyfullah Madakbaş, Ferhat Şen, Kadi̇r Esmer
Structural And Dielectrical Behavior Of Polypyrrole/Huntite Composites, Zeynep Türk, Nazlican Şahi̇n, Seyfullah Madakbaş, Ferhat Şen, Kadi̇r Esmer
Turkish Journal of Chemistry
In order to characterize stable composites that will contribute to industrial applications, polypyrrole (PPy)/huntite composites were prepared by the physical method. Polypyrrole (PPy)/huntite composites were produced at various huntite concentrations (10, 20, 30, 40 wt.%). Polypyrrole/huntite was characterized by Fourier transform infrared spectroscopy (FTIR), Thermal Gravimetric Analyses (TGA), Differential Thermal Analyses (DTA), Scanning electron microscopy (SEM), and dielectrical properties were investigated by Impedance Analyzer at the room temperature. The FTIR spectra show that huntite mineral coordinate with polymers through carbonate groups. TGA results indicate the main cause of mass loss can be moisture in the samples and unreacted pyrrole monomer. …
Surfactant Incorporated Preyssler Polyoxoanion: A Transition Metal Substituted Mo-Php Complex And Its Applications, Bharath Samannan, Jothi Selvam, Yi-Li Lin, Praveen Peter, Jeyabalan Thavasikani
Surfactant Incorporated Preyssler Polyoxoanion: A Transition Metal Substituted Mo-Php Complex And Its Applications, Bharath Samannan, Jothi Selvam, Yi-Li Lin, Praveen Peter, Jeyabalan Thavasikani
Turkish Journal of Chemistry
The complex was prepared with preyssler polyoxoanion and transition metal (Mo), a cationic surfactant as a connector. It has tuneable physical and chemical potential which has been exploited to study novel properties. A new technique of shock wave impulses is also used on the Mo-PHP complex. Extensive use of cationic surfactants could impact accumulation in the environment set off the surfacing of bacterial resistance. Due to the electrostatic binding to bacterial surface, the hydrophobic parts of cationic surfactants tend to penetrate bacterial cell walls and may cause membrane lysis and bacteria death. The surfactant-supported and direct release of metal ions …
Effect Of Size-Graded And Polydopamine-Coated Halloysite Nanotubes On Fundamental Properties Of Low-Density Polyethylene Nanocomposite Film, Cüneyt Erdi̇nç Taş
Effect Of Size-Graded And Polydopamine-Coated Halloysite Nanotubes On Fundamental Properties Of Low-Density Polyethylene Nanocomposite Film, Cüneyt Erdi̇nç Taş
Turkish Journal of Chemistry
In this study, some of the critical fundamental properties, which are holding importance in usage areas, of low-density polyethylene (LDPE) film were studied by embedding size-graded and polydopamine-coated halloysite nanotubes into the polymer matrix. This concept evaluated the importance of the well-dispersion of nanoparticles in the composite system and interfacial adhesion between nanofiller and polymer matrix on the degree of crystallinity and mechanical properties. For this purpose, halloysite nanotubes, coated with polydopamine and size graded afterward, were integrated into the LDPE matrix by the twin-screw extrusion process, following which, nanocomposite films were prepared by film-blown technique. Both effects of halloysite …
Gan/Zno Hybrid Nanostructures For Improved Photocatalytic Performance: One-Step Synthesis, Tugay Üstün, Bi̇rcan Haspulat Taymaz, Volkan Eski̇zeybek, Handan Kamiş, Ahmet Avci
Gan/Zno Hybrid Nanostructures For Improved Photocatalytic Performance: One-Step Synthesis, Tugay Üstün, Bi̇rcan Haspulat Taymaz, Volkan Eski̇zeybek, Handan Kamiş, Ahmet Avci
Turkish Journal of Chemistry
Nanostructured semiconductor materials are considered potential candidates for the degradation of textile wastewater via the photocatalytic process. This study aims to produce hexagonal gallium nitride (GaN) nanoplates and zinc oxide (ZnO) nanoparticles in a deionized water environment utilizing a one-step arc discharge process. Detailed characterization of samples has been completed via scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and UV visible spectroscopy methods. The hybrid nanostructure morphologies consist of nanoplates and nanorods of different sizes. The photoperformance of GaN/ZnO hybrid nanostructures was assessed via the malachite green (MG) dye degradation under …
The Effect Of Poss Nanoparticles On Crosslinking Of Styrene-Butadiene Rubber Nanocomposites, Seda Beki̇n Açar, Mehmet Ati̇lla Taşdelen, Bağdagül Karaağaç
The Effect Of Poss Nanoparticles On Crosslinking Of Styrene-Butadiene Rubber Nanocomposites, Seda Beki̇n Açar, Mehmet Ati̇lla Taşdelen, Bağdagül Karaağaç
Turkish Journal of Chemistry
The effect of octaisobutyl-polyhedral oligomeric silsesquioxane (OIB-POSS) as a nanosized reinforcement on the cure kinetics, crosslinking density, and mechanical properties of styrene-butadiene rubber (SBR) nanocomposites was examined in this study. For this purpose, SBR compounds with various OIB-POSS nanoparticle loadings at 1, 3, and 5 phr were prepared and their results were compared with a reference compound without OIB-POSS. When 1 phr of OIB-POSS was added to the rubber matrix, the elongation at break values and tensile strength of the corresponding nanocomposite increased by 24.1% and 29.2% compared to the reference sample, respectively. The presence of OIB-POSS nanoparticles and their …
Privileged Fragment-Based Design, Synthesis And In Vitro Antitumor Activity Of Imatinib Analogues, Hongyu Jiang, Yuankun Wang, Maokai Jiang, Lei Yao
Privileged Fragment-Based Design, Synthesis And In Vitro Antitumor Activity Of Imatinib Analogues, Hongyu Jiang, Yuankun Wang, Maokai Jiang, Lei Yao
Turkish Journal of Chemistry
Based on the privileged fragment-based drug design strategy, a series of imatinib analogues bearing the moiety of 3-(2-amino- 2-oxoacetyl)-1H-indole were designed and synthesized, and the in vitro antitumor activity of these compounds was detected by MTT method using K562 (human myeloid leukemia) and K562R (imatinib-resistant chronic myeloid leukemia) cell lines. Molecular docking was used to preliminarily explain the possible binding modes. The most potent compound I2 exhibited better antitumor activity than those of imatinib against K562 and K562R cancer cells with IC50 values of 0.8 ?M and 0.7 ?M.
H2(G) Production From Dimethylamine Borane By Cu0/Wo3 Nps Catalyst, Doaa Al-Hameedawi̇, Seda Karaboğa, İzzet Morkan
H2(G) Production From Dimethylamine Borane By Cu0/Wo3 Nps Catalyst, Doaa Al-Hameedawi̇, Seda Karaboğa, İzzet Morkan
Turkish Journal of Chemistry
Cu0 NPs supported on tungsten (VI) oxide (WO3) were in situ generated from the reduction of Cu2+ ions during dehydrogenation of dimethylamine borane (DMAB). The Cu0/WO3 NPs displayed tangible catalytic activity in H2 (g) releasing reaction and they were identified by using advanced techniques. Cu0/WO3 NPs were found as active catalyst providing one equiv. H2(g) per mole of DMAB. The results from TEM images display the formation of Cu0 NPs with an average particle size of 4.6 ± 1.0 nm on the surface of WO3. Moreover, Cu0/WO3 NPs with various metal loadings were prepared and tested as catalyst in dehydrogenation …
Carbon Nanotube/Waterborne Polyurethane Nanocomposites With Light-To-Heat Conversion Properties, Hayri̇ye Ünal
Carbon Nanotube/Waterborne Polyurethane Nanocomposites With Light-To-Heat Conversion Properties, Hayri̇ye Ünal
Turkish Journal of Chemistry
Photothermal materials and coatings which can create temperature elevations under light irradiation can be utilized in various applications requiring remote heating. Here, multiwalled carbon nanotubes (MWNT) were incorporated into waterborne polyurethane (PU) to obtain photothermal coatings with light-to-heat conversion properties. Resulting PU-MWNT coatings were demonstrated to heat up to 80 °C under sunlight irradiation at 2 sunlight density for 18 min. Pseudomonas aeruginosa (P. aeruginosa) cells attached to surfaces coated with PU-MWNT nanocomposites were killed upon near infrared (NIR) light irradiation at 808 nm for 15 min, whereas the same cells attached to control neat PU-coated surfaces remained alive under …
Synthesis Optimization Of Zro2 Nanostructures For Photocatalytic Applications, Fi̇li̇z Boran, Merve Okutan
Synthesis Optimization Of Zro2 Nanostructures For Photocatalytic Applications, Fi̇li̇z Boran, Merve Okutan
Turkish Journal of Chemistry
This study aims to optimize the synthesis of semiconductor zirconia (ZrO2) nanoparticles for future photocatalytic applications in degradation of pollutants in wastewater under ultraviolet (UV) light. The synthesis procedure of ZrO2 nanoparticles was optimized by examining the effects of synthesis methods (ultrasound-assisted, hydrothermal method in an autoclave and conventional precipitation), reaction time (2, 6, 10, and 18 h), ambient pH (3, 7, 10, 13), and surfactant type (anionic, cationic, and non-ionic), on the particle size and crystal phase of the nanomaterial. The characterization of the synthesized samples was performed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray …
Ultrasound-Assisted Synthesis Of Rgo/Sio2-Based Nanosheets And Their Electrochemical Performances In Li-Ion Batteries, Ersu Lökçü, Süleyman Can, Mustafa Anik
Ultrasound-Assisted Synthesis Of Rgo/Sio2-Based Nanosheets And Their Electrochemical Performances In Li-Ion Batteries, Ersu Lökçü, Süleyman Can, Mustafa Anik
Turkish Journal of Chemistry
In this study, a facile approach has been developed to fabricate GO/SiO2 nanosheets by the hydrolysis of tetraethyl orthosilicate (TEOS) in the graphene oxide (GO) solution with the assistance of the ultrasonication. The morphology and structure of the SiO2/GO nanosheets were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopy. The results showed that the covalently bonded SiO2 nanoparticles onto the GO sheets were dense and uniform. The agglomeration of the nanosheets was prevented by the ultrasonication and the layer sizes decreased throughout the synthesis process. The size and thickness of the SiO2 …
New Pyrimidine-N-Ss-D-Glucosides: Synthesis, Biological Evaluation, And Molecular Docking Investigations, Nuran Kahri̇man, Kivanç Peker, Vi̇ldan Serdaroğlu, Ali̇ Aydin, Burçi̇n Türkmenoğlu, Asu Usta, Nuretti̇n Yayli
New Pyrimidine-N-Ss-D-Glucosides: Synthesis, Biological Evaluation, And Molecular Docking Investigations, Nuran Kahri̇man, Kivanç Peker, Vi̇ldan Serdaroğlu, Ali̇ Aydin, Burçi̇n Türkmenoğlu, Asu Usta, Nuretti̇n Yayli
Turkish Journal of Chemistry
In this study, syntheses of new pyrimidine-coupled N-ß-glucosides and tetra-O-acetyl derivatives were carried out. All glycoconjugates were investigated in comparison with known chemotherapeutic agents in terms of their antimicrobial and anticancer functions and DNA/protein binding affinities. Spectral data showed that all glycoside derivatives were obtained by diastereoselectivity as ß-anomers. Both tested groups exhibited strong antiproliferative activity (2.29?66.84 ?g/mL), but some of them had sufficiently ideal % cytotoxicity values (10.01%?16.78%). And also all synthetic compounds exhibited remarkable antibacterial activity against human pathogenic bacteria. Binding of these compounds to CT-DNA resulted in significant changes in spectral properties, consistent with groove binding. Molecular …
In Vitro Tyrosinase Inhibitory, Dna Interaction Studies, And Lc?Hrms Analysis Of Ficus Carica Leaves, Güli̇n Renda, Burak Barut, Rümeysa Ceren, Enes Aydin
In Vitro Tyrosinase Inhibitory, Dna Interaction Studies, And Lc?Hrms Analysis Of Ficus Carica Leaves, Güli̇n Renda, Burak Barut, Rümeysa Ceren, Enes Aydin
Turkish Journal of Chemistry
Turkey is the world?s leading producer of figs, a typical Mediterranean fruit. The fig, Ficus carica L. (Moraceae), has been widely cultivated since ancient times due to the nutritional value of its fruits. It was aimed to investigate the phytochemical characterization and biological properties of F. carica leaf extracts in order to determine their potential for use in the treatment of various diseases. F. carica leaves were extracted in 70% methanol at 40 °C under reflux. To obtain extracts of different polarities, the crude extract was fractionated with n-hexane, dichloromethane, and n-butanol. Phenolic content was determined using liquid chromatography?high resolution …
Ultraviolet-Activated Clamshell Hydroxyapatite-Substituted Palladium In The Photoreduction Of Methyl Orange Water Pollutant, Anis Liyana Azhar, Azman Ma'amor, Nurhidayatullaili Muhd Julkapli, Nor Asrina Sairi, Aina Sofea Noraizat
Ultraviolet-Activated Clamshell Hydroxyapatite-Substituted Palladium In The Photoreduction Of Methyl Orange Water Pollutant, Anis Liyana Azhar, Azman Ma'amor, Nurhidayatullaili Muhd Julkapli, Nor Asrina Sairi, Aina Sofea Noraizat
Turkish Journal of Chemistry
This study focuses on the modification of natural hydroxyapatite (HAp) derived from clamshell by impregnation with palladium (Pd) at different pH in wet precipitation method to produce photoactive green materials for the degradation of synthetic dyes. It was found that, at pH 10, Pd has been successfully impregnated into HAp lattice with Ca/P ratio of 1.77 and particle distribution size range of 40?470 nm. The impregnation has resulted in the band gap of Pd/HAp at 3.19 eV, as calculated using Tauc?s plot from the UV-Vis spectroscopy data of the Pd/HAp. Next, the photocatalytic activities of Pd/HAp were carried out with …
Dual-Reactive Hydrogels Functionalizable Using ?Huisgen Click? And ?Schiff Base? Reactions, Nergi̇z Cengi̇z
Dual-Reactive Hydrogels Functionalizable Using ?Huisgen Click? And ?Schiff Base? Reactions, Nergi̇z Cengi̇z
Turkish Journal of Chemistry
Hydrogels incorporating different reactive groups are important platforms for the fabrication of functional materials through the conjugation of diverse molecules. In this study, a dual-reactive hydrogel system was designed utilizing aldehyde and azide groups containing methacrylate monomers. Hydrogels were obtained in the presence of a dimethacrylate crosslinker with a combination of hydrophilic PEG-based monomers via free-radical polymerization. The azide and aldehyde sites of the hydrogel network are reactive towards alkyne and amine functional groups, respectively. The advantage of the different reactivities of these functional groups was demonstrated through the attachment of two different dye molecules onto the hydrogel platform via …
Facile Preparation Of Polyolefin-Based Amphiphilic Graft Copolymer Fibers By Combination Of Photoinduced Graft Copolymerization And Electrospinning, Çağatay Altinkök
Facile Preparation Of Polyolefin-Based Amphiphilic Graft Copolymer Fibers By Combination Of Photoinduced Graft Copolymerization And Electrospinning, Çağatay Altinkök
Turkish Journal of Chemistry
A novel amphiphilic graft copolymer possessing polypropylene (PP) main chain and poly(oligoethylene glycol methacrylate) (POEGMA) pendant units was synthesized starting from chlorinated polypropylene (PP-Cl), and characterized. PP-Cl produced macroradicals at chlorine bounded carbon atoms by visible light irradiation in the presence of dimanganese decacarbonyl [Mn2(CO)10] and initiated the free-radical photopolymerization of an acrylate monomer, namely oligoethylene glycol methacrylate (OEGMA). Furthermore, fiber formation ability of PP-g-POEGMA was tested by electrospinning technique. The chemical structure and some features of the corresponding amphiphilic graft copolymer PP-g-POEGMA was characterized by implementing spectral (FT-IR, 1H-NMR), chromatographic (GPC), morphological (SEM), water wettability (WCA), and thermal (TGA) …
Modelling And Simulation Of Chemical Reaction Of Porous Mgcl2 Pellets With Nh3 By Including Impact Of Heat And Mass Transfer And Structure Change, Zeynep Karakaş Helvaci, Gürkan Karakaş, Yusuf Uludağ
Modelling And Simulation Of Chemical Reaction Of Porous Mgcl2 Pellets With Nh3 By Including Impact Of Heat And Mass Transfer And Structure Change, Zeynep Karakaş Helvaci, Gürkan Karakaş, Yusuf Uludağ
Turkish Journal of Chemistry
The MgCl2?NH3 reactive system is investigated in terms of heat and mass transfer coupled with chemical reaction through numerical simulation. The reversible nature of the chemical reaction is captured by including adsorption and desorption terms in the rate expression simultaneously. The kinetic coefficients of the adsorption are directly adopted from the literature, while those for the desorption reaction are calculated based on the thermodynamic relations. The impact of changing pressure and pellet porosity are also investigated in the simulations. The initial temperature of the pellet is 300 K in all simulations. Temperature, NH3 pressure, and conversion distributions in the pellets, …
Zinc-Mediated Efficient And Selective Reductive Aza-Claisen Rearrangement Of N-Allyland N-Propargylaminoanthraquinones In Ionic Liquid, Fereshteh Albooyeh, Ghasem Aghapour
Zinc-Mediated Efficient And Selective Reductive Aza-Claisen Rearrangement Of N-Allyland N-Propargylaminoanthraquinones In Ionic Liquid, Fereshteh Albooyeh, Ghasem Aghapour
Turkish Journal of Chemistry
An efficient method is described for the first time for reductive aza-Claisen rearrangement of 1-(N-allylamino) anthraquinones to 1-amino-2-(prop-2?-enyl)anthraquinones using zinc powder in 1-methylimidazolium tetrafluoroborate ([Hmim] BF4) as an ionic liquid in good to excellent yields. Extending of this method on 1-(N-propargylamino)anthraquinones causes the production of 1,2,3,4-tetrahydronaphtho[2,3-h]quinoline-7,12-diones containing a newly synthesized six membered heterocyclic ring on anthraquinone core via performing this reductive [3,3] sigmatropic reaction followed by cyclization in a tandem manner. These rearrangements can be executed even in the presence of some other functional groups with excellent chemoselectivity.
Hydrophobic Surface Modification And Characterization Of Melamine Foam, Merve Okutan, Fi̇li̇z Boran, Ayça Ergün, Yusuf Kanca, Bengi̇ Özkahraman, Hüseyi̇n Deli̇göz
Hydrophobic Surface Modification And Characterization Of Melamine Foam, Merve Okutan, Fi̇li̇z Boran, Ayça Ergün, Yusuf Kanca, Bengi̇ Özkahraman, Hüseyi̇n Deli̇göz
Turkish Journal of Chemistry
Superhydrophobic and oleophilic modification of commercial acoustic melamine foam (MF) was made in this study. The modification was carried out with chitosan (CHI) and silica particles (SiO2), by using both a layer-by-layer-like approach (LbL) and dip coating technique. Subsequently, 1-octadecanethiol was used as a secondary modification agent. QCM-D, SEM, and FTIR analyses confirmed that the coating was successfully performed. After the modification, the column wall thicknesses increased than that of MF and they ranged from 25% to 48% for modified MF with an LbL-like approach (MMF) and modified MF via dip coating technique (MMFd), respectively. The sorption experiments showed that …
Spectrophotometric Quantification Of Paracetamol And Tramadol Hydrochloride By Chemometric Calibration Methods, Faysal Seli̇moğlu, Nermi̇n Pinarcik
Spectrophotometric Quantification Of Paracetamol And Tramadol Hydrochloride By Chemometric Calibration Methods, Faysal Seli̇moğlu, Nermi̇n Pinarcik
Turkish Journal of Chemistry
The results of UV spectrophotometric analysis were analysed using partial least squares (PLS) and principal component regression (PCR) techniques to allow simultaneous evaluation of tramadol hydrochloride (TRA) and p-acetaminophen (PAR) in tablets. A calibration set of 16 mixtures, each containing PAR and TRA in various amounts, was created using a 24-full fractional design. The absorbance data set for the calibration set were obtained between 215?280 nm (?? = 0.1 nm). Subsequently, the concentration and absorbance sets were used to generate PCR and PLS calibrations. The ratio spectra- first derivative method was devised as a solution to the same problem to …
The Study Of Fe3o4@Sio2-Nh2 Nano-Magnetic Composite Modified By Glutaraldehyde To Immobilized Penicillin G Acylase, Monier Alhadi Abdelrahman Mohammed, Zhenbin Chen, Ke Li, Boyuan Zhang
The Study Of Fe3o4@Sio2-Nh2 Nano-Magnetic Composite Modified By Glutaraldehyde To Immobilized Penicillin G Acylase, Monier Alhadi Abdelrahman Mohammed, Zhenbin Chen, Ke Li, Boyuan Zhang
Turkish Journal of Chemistry
Preparation of biocatalyst dependent on immobilized penicillin G acylase (PGA) was of substantial importance for proteomic research, organic synthesis, and industrial applications. Herein, we developed an easy method for nano-magnetic composite to immobilize PGA. Fe3O4 nano-magnetic particles were co-precipitated with Fe3+ and Fe2+ in an ammonia solution (NH3) and treated with silicon dioxide (SiO2), which was developed using the sol-gel process. Thereafter, 3-aminopropyltriethoxysilane (APTES) was used to modify the silica-coated Fe3O4, which would result in the attachment of the primary amine groups to the particle surface. After that, the attachment of primary amine group was reacted with glutaraldehyde (Glu) to …
Comparison Of Volatile Chemical Components Of Cystoseira Crinita Duby By Hydrodistillation(Hd) And Solid-Phase Microextraction (Spme) Methods And Antimicrobialand Scolicidal Activities Of Essential Oil And Extracts, Tayyi̇be Beyza Yücel
Turkish Journal of Chemistry
This study aims to derive an essential oil from Cystoseira crinita Duby, analyze the chemical composition of the essential oil, discover the antimicrobial activities of the oil and the extracts, and investigate the scolicidal activities of the extracts. The volatile organic compounds of Cystoseira crinita Duby were determined by GC/MS-FID using both hydro-distillation (HD) and solid-phase microextraction (SPME) methods. As a result of the essential oil analysis, 97.14% of 17 compounds and 93.13% of 19 compounds were elucidated. The main compounds identified were hexanal (31.802%), n-hexadecanoic acid (12.654%), trans-β-ionone (9.118%), 2E-hexenal (15.955%), heptadecane (15.729%) and tetradecane (13.458%). In addition, hexane, …
Cerium And Europium Doped Tio2 Thin Films Deposited By A Sol-Gel Dip-Coating Process: Characterization And Photocatalytic Activity Toward Dye Degradation, Dalanda Hamdi, Lobna Mansouri, Varsha Srivastava, Mika Sillanpaa, Latifa Bousselmi
Cerium And Europium Doped Tio2 Thin Films Deposited By A Sol-Gel Dip-Coating Process: Characterization And Photocatalytic Activity Toward Dye Degradation, Dalanda Hamdi, Lobna Mansouri, Varsha Srivastava, Mika Sillanpaa, Latifa Bousselmi
Turkish Journal of Chemistry
Cerium (Ce) and europium (Eu)-doped TiO2 thin films were obtained by sol-gel dip-coating technique. SEM micrographs showed that the surfaces are covered by agglomerated particles due to the repeating coating process. XRD patterns showed the presence of TiO2 anatase phase. Raman spectra revealed that the peaks recorded at 146 cm-1(Eg) and 397 cm-1(B1g) were related to the anatase phase. EIS measurements proved that Ce-TiO2 (1wt%) and Eu-TiO2 (0.1wt%) photocatalysts possessed a lower electron transfer resistance than pure TiO2, which can lead to effective separation of electron/ hole pairs during the photoreactions. The photoactivity of Ce and Eu-doped TiO2 was investigated …
Preparation Of Zno Nanoparticles Modified With Silane Coupling-Agents To Fabricateanti-Uv Poly(Vinyl Chloride) Films, Xiangmei Ma, Zhehao Dong, Bin Wang, Limin Liu, Ruojun Ye
Preparation Of Zno Nanoparticles Modified With Silane Coupling-Agents To Fabricateanti-Uv Poly(Vinyl Chloride) Films, Xiangmei Ma, Zhehao Dong, Bin Wang, Limin Liu, Ruojun Ye
Turkish Journal of Chemistry
The uses of inorganic metal oxide as ultraviolet (UV) absorbers have potential to increase the production of UV protection and can also overcome the disadvantages of organic molecules. In this article, we report an effective technique to fabricating polyvinyl chloride (PVC) films with well UV shielding efficiency. Surface modification of zinc oxide (ZnO) nanoparticles (NPs) with different silane coupling-agents were achieved, and through solution casting technique dispersed within the PVC matrix. Infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and UV spectrophotometer were applied to study the structures, dispersions, and optical properties. The results showed that the functionalized …
Development And Validation Of A New Rp-Hplc Method For Organic Explosive Compounds, Sali̇h Murat Ünsal, Emre Erkan
Development And Validation Of A New Rp-Hplc Method For Organic Explosive Compounds, Sali̇h Murat Ünsal, Emre Erkan
Turkish Journal of Chemistry
A new RP-HPLC method was developed and validated to achieve the separation and quantification of the organic explosive compounds such as pentaerythritol tetranitrate (PETN), 1-methyl-2,4,6-trinitro toluen (TNT), picric acid, 1,3,5,7-tetrazocine (HMX), cyclorimethylenetrinitramine (RDX), 2,4,6 Tri nitro phenyl methyl nitramine (Tetryl), 1-methyl-2,4-dinitro toluen (DNT), ethylene glycol dinitrate (EGDN), and trinitroglycerine (TNG) in this study. The mobile phase composition (IPA percentage in water) and the flow rate was optimized for the separation of the organic explosive compounds. Theoretical plate number (N), capacity factor (k'), resolution (Rs) were used to determine the optimum chromatographic conditions. The most favorable conditions were detected as 22% …