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Development Of A Biosensor Platform Based On Ito Sheets Modified With 3-Glycidoxypropyltrimethoxysilane For Early Detection Of Trap1, Berfi̇n Vural, Meltem Çalişkan, Mustafa Kemal Sezgi̇ntürk Jan 2020

Development Of A Biosensor Platform Based On Ito Sheets Modified With 3-Glycidoxypropyltrimethoxysilane For Early Detection Of Trap1, Berfi̇n Vural, Meltem Çalişkan, Mustafa Kemal Sezgi̇ntürk

Turkish Journal of Chemistry

The aim of this research was to design an electrochemical immunosensor for determination of tumour necrosis factor receptor-associated protein-1(TRAP1) antigen, a heat shock protein linked to tumour necrosis factor. The indium-tin oxide covered polyethylene terephthalate (ITO-PET) electrode surface was cleaned and was prepared for the introduction of hydroxyl groups on its surface by using NH$_{4}$ OH/H$_{2}$O$_{2}$/H$_{2}$O. As a silanization agent for covalent attachment of anti-TRAP1 on the surface of the ITO working electrode, 3-glycidoxypropyltrimethoxysilane (3-GOPS) was used. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to characterize the immobilization steps. A variety of parameters, 3-GOPS and anti-TRAP1 concentrations, …

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Sensitive Determination Of Hydrogen Peroxide In Real Water Samples By High Spin Peroxo Complex, Tuğba Yavuz, Levent Peli̇t Jan 2020

Sensitive Determination Of Hydrogen Peroxide In Real Water Samples By High Spin Peroxo Complex, Tuğba Yavuz, Levent Peli̇t

Turkish Journal of Chemistry

In this paper, a fast, cheap, simple, sensitive and selective spectrophotometric method based on high spin peroxo-Fe(III)-EDTAcomplexinthealkalinemediumwasdevelopedforthedeterminationofhydrogenperoxide(H$_{2}$O$_{2}$) in real water samples. The purple-coloured complex with a maximum absorbance at a wavelength of 525 nm was formed. Various parameters such as type of stabilizer reagent and its concentration, reaction time, Fe(III), EDTA and NH3 concentration were optimized. The method was confirmed with the Beer?s law with a molar absorption coefficient of267.36Lmol$^{-1}$ cm$^{-1}$ in the 8.3×10$^{-6}$ -4.08×10$^{3}$ mol/L concentrationrange. Sandell's sensitivityoftheproposed method was also calculated as 0.188 µg/cm2. LOD and LOQ were determined as 2.5 ×10$^{-6}$ and 8.3 ×10$^{-6}$ mol/L, respectively. Intraday …

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Combined Computational And Experimental Studies On Cysteine-Sulfadiazine Adduct Formation, Nursel Açar Selçuki̇, Emi̇ne Coşkun, Ender Bi̇çer Jan 2020

Combined Computational And Experimental Studies On Cysteine-Sulfadiazine Adduct Formation, Nursel Açar Selçuki̇, Emi̇ne Coşkun, Ender Bi̇çer

Turkish Journal of Chemistry

The electrochemical characterization of sulfadiazine-cysteine (SD-CYS) adduct formation was performed in phosphatebuffer(pH7)onthebasisofvoltammetriccurrentandpeakpotentialmeasurements. Duetotheassociationof cysteine with sulfadiazine, the reduction peak currents of mercuric and mercurous cysteine thiolates decreased and their peak potentials simultaneously shifted to less negative potentials. By using the current changes of mercurous cysteine thiolate, it was determined that cysteine and sulfadiazine are associated with a 1:1 stoichiometry with a conditional association constant of 1.99 ×10$^{4}$ M$^{-1}$. In addition to experimental studies, a computational approach was carried out to study the geometrical parameters, electron densities, and UV-Vis absorption spectra of sulfadiazine and SDCYS adduct in water. Calculated (B3LYP/6-311++G(d,p) level) …

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Fabrication And Biocompatibility Assessment Of Polypyrrole/Cobalt(Ii) Metal-Organic Frameworks Nanocomposite, Mehrnaz Mehrabani, Zeinab Ansari Asl, Farzaneh Rostamzadeh, Saeideh Jafarinejad Farsangi, Mahnaz Sadat Hashemi, Mozhgan Sheikholeslami, Zeinab Neisi Jan 2020

Fabrication And Biocompatibility Assessment Of Polypyrrole/Cobalt(Ii) Metal-Organic Frameworks Nanocomposite, Mehrnaz Mehrabani, Zeinab Ansari Asl, Farzaneh Rostamzadeh, Saeideh Jafarinejad Farsangi, Mahnaz Sadat Hashemi, Mozhgan Sheikholeslami, Zeinab Neisi

Turkish Journal of Chemistry

Nowadays, metal-organic frameworks (MOFs) have emerged as promising tools for different biological applications and therefore, efforts are ongoing to develop more biocompatible MOFs-based nanocomposites. We aimed to fabricate some new conductive nanocomposites of polypyrrole and cobalt-MOF with different weight percentages (PPy/x%Co-MOF)usingthesolutionmixingmethodandcharacterizethemthroughFT-IR(Fourier-transforminfrared), PXRD (powder X-ray diffraction), SEM (scanning electron microscope), and TEM (transmission electron microscope) techniques. The biocompatibility of nanocomposites was assessed by haemolytic, cytotoxic, and quantitative reverse transcription PCR (qRT-PCR) assays. FT-IR and PXRD results revealed that nanocomposites consisted of pure MOFs and PPy. Moreover, SEM results indicated their spherical morphology along with an average diameter of 190 nm. (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium …

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Bioreduction: The Biological Activity, Characterization, And Synthesis Of Silver Nanoparticles, Nesri̇n Korkmaz Jan 2020

Bioreduction: The Biological Activity, Characterization, And Synthesis Of Silver Nanoparticles, Nesri̇n Korkmaz

Turkish Journal of Chemistry

Today, nanoparticles are effectively used in different areas. Initially, physical and chemical methods were used in the synthesis of nanoparticles. Biosynthesis (green synthesis) has emerged as an alternative to overcome the toxic effects of chemically synthesized nanoparticles. In this study, green synthesis of silver nanoparticles (AgNPs) with the leaf extract of Anthurium andraeanum was performed. UV-Vis spectrophotometry, scanning transmission electron microscopy, and XRD were applied to characterize the biosynthesized nanoparticles. As a result of the characterization, the spectra showed that a spectrum at a wavelength of about 419 nm and a spherical size of 38 nm nanoparticles was formed. Antibacterial …

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Design Of An Amphiphilic Hyperbranched Core/Shell-Type Polymeric Nanocarrier Platform For Drug Delivery, Ayça Bal Öztürk, Nesri̇n Oğuz, Hande Tekarslan Şahi̇n, Serkan Emi̇k, Emi̇ne Alarçi̇n Jan 2020

Design Of An Amphiphilic Hyperbranched Core/Shell-Type Polymeric Nanocarrier Platform For Drug Delivery, Ayça Bal Öztürk, Nesri̇n Oğuz, Hande Tekarslan Şahi̇n, Serkan Emi̇k, Emi̇ne Alarçi̇n

Turkish Journal of Chemistry

An amphiphilic core/shell-type polymer-based drug carrier system (HPAE- PCL-b-MPEG), composed of hyperbranched poly(aminoester)-based polymer (HPAE) as the core building block and poly(ethylene glycol)-bpoly(ε-caprolactone) diblock polymers (MPEG-b-PCL) as the shell building block, was designed. The synthesized polymers were characterized with FTIR, $^{1}$H NMR, $^{13}$C NMR, and GPC analysis. Monodisperse HPAE-PCL-bMPEG nanoparticles with dimensions of

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Arene Diazonium Saccharin Intermediates: A Greener And Cost-Effective Alternative Method For The Preparation Of Aryl Iodide, Lia Zaharani, Nader Ghaffari Khaligh, Zohreh Shahnavaz, Mohd Rafie Johan Jan 2020

Arene Diazonium Saccharin Intermediates: A Greener And Cost-Effective Alternative Method For The Preparation Of Aryl Iodide, Lia Zaharani, Nader Ghaffari Khaligh, Zohreh Shahnavaz, Mohd Rafie Johan

Turkish Journal of Chemistry

In the current protocol, the arene diazonium saccharin derivatives were initially produced from various substituted aromatic amines; subsequently, these intermediates were treated with a greener organic iodide for the preparation of the aryl iodide. We tried to choose low-cost, commercially available, biodegradable, recoverable, ecofriendly, and safe reagents and solvents. The arene diazonium saccharin intermediates could be stored in the liquid phase into a refrigerator for a long time with no significant loss activity. The outstanding merits of the current protocol (a) included the partial recovering of saccharin and tetraethylammonium salt, (b) reduce the use of solvents and the reaction steps …

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Combined Ligand And Structure-Based Virtual Screening Approaches For Identification Of Novel Ache Inhibitors, Kader Şahi̇n, Serdar Durdaği Jan 2020

Combined Ligand And Structure-Based Virtual Screening Approaches For Identification Of Novel Ache Inhibitors, Kader Şahi̇n, Serdar Durdaği

Turkish Journal of Chemistry

The excessive activity of acetylcholinesterase enzyme (AChE) causes different neuronal problems, especially dementia and neuronal cell deaths. Food and Drug Administration (FDA) approved drugs donepezil, rivastigmine, tacrine and galantamine are AChE inhibitors and in the treatment of Alzheimer's disease (AD) these drugs are currently prescribed. However, these inhibitors have various adverse side effects. Therefore, there is a great need for the novel selective AChE inhibitors with fewer adverse side effects for the effective treatment. In this study, combined ligand-based and structure-based virtual screening approaches were used to identify new hit compounds from small molecules library of National Cancer Institute (NCI) …

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Effect Of Polyelectrolyte Complex Formation On The Antibacterial Activity Of Copolymer Of Alkylated 4-Vinylpyridine, Murat Topuzoğullari Jan 2020

Effect Of Polyelectrolyte Complex Formation On The Antibacterial Activity Of Copolymer Of Alkylated 4-Vinylpyridine, Murat Topuzoğullari

Turkish Journal of Chemistry

Polymers bearing quaternized 4-vinylpyridine (QVP) groups are known for their antibacterial activities and these polymers can form polyelectrolyte complexes (PEC) with polyanions through electrostatic interactions. PEC formation can be used to adjust the antibacterial activity of polymers of QVP, deliver active molecules, or design antibacterial supramolecular structures. However, the antibacterial activity of PECs of QVP polymers has not been investigated. In this study, a copolymer of QVP was mixed with polyacrylic acid in various molar ratios of components to form PECs. Hydrodynamic diameters and zeta potentials of formed PECs were determined by dynamic and electrophoretic light scattering spectroscopy techniques. The …

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Hosphorus-Nitrogen Compounds (Part 51): The Relationship Between Spectroscopic And Crystallographic Data Of Mono- And Di-Spirocyclophosphazene Derivatives With 4-Fluoro/Nitrophenylmethyl Pendant Arm/Arms, Aytuğ Okumuş, Gamze Elmas, Nuran Asmafi̇li̇z, Selen Bi̇lge Koçak, Zeynel Kiliç Jan 2020

Hosphorus-Nitrogen Compounds (Part 51): The Relationship Between Spectroscopic And Crystallographic Data Of Mono- And Di-Spirocyclophosphazene Derivatives With 4-Fluoro/Nitrophenylmethyl Pendant Arm/Arms, Aytuğ Okumuş, Gamze Elmas, Nuran Asmafi̇li̇z, Selen Bi̇lge Koçak, Zeynel Kiliç

Turkish Journal of Chemistry

A great wealth of structural information about phosphazenes can be gleaned from the combined spectroscopic and crystallographic data. When data from $^{31}$P NMR spectroscopy and X-ray crystallography are put together like pieces in a puzzle, a number of correlations can be obtained for phosphazene derivatives. A systematic study concerning the correlations among the structural parameters (e.g., $^{31}$P NMR data, endocyclic/exocyclic NPN bond angles and bond lengths) revealed some characteristics of mono- and di-spirocyclophosphazene derivatives bearing~4-fluoro/nitrophenylmethyl pendant arm/arms. These correlations include the relationship between the $\delta $P$_{spiro}$ shifts, the values of electron density transfer parameters $\Delta $(P--N), and the endocyclic and …

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Phosphorus-Nitrogen Compounds- (Part 50): Correlations Between Structural Parameters For Cylophosphazene Derivatives Containing Ferrocenyl Pendant Arm(S), Nuran Asmafi̇li̇z, Gamze Elmas, Aytuğ Okumuş, Selen Bi̇lge Koçak, Zeynel Kiliç Jan 2020

Phosphorus-Nitrogen Compounds- (Part 50): Correlations Between Structural Parameters For Cylophosphazene Derivatives Containing Ferrocenyl Pendant Arm(S), Nuran Asmafi̇li̇z, Gamze Elmas, Aytuğ Okumuş, Selen Bi̇lge Koçak, Zeynel Kiliç

Turkish Journal of Chemistry

The results of a systematic study of spiro-cyclotri/tetraphosphazenes with ferrocenyl pendant arm on the basis of correlation between structural parameters were presented. The main parameters were obtained from Xray crystallography and 31 P NMR results in order to investigate the relationship between the δ P$_{spiro}$ shift values and endocyclic and exocyclic NPN bond angles, and electron density transfer parameters. Structural parameters derived from 11 types of the ferrocenyl cyclophosphazene derivatives with 5- to 7-membered spiro-rings introduced to the literature from our research group were studied and compared with each other.

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Syntheses And Antibacterial Activities Of 4 Linear Nonphenolic Diarylheptanoids, Şemsi̇ Betül Demi̇r, Hati̇ce Seçi̇nti̇, Nesli̇han Çelebi̇oğlu, Murat Özdal, Alev Sezen, Özlem Gülmez, Ömer Faruk Algur, Hasan Seçen Jan 2020

Syntheses And Antibacterial Activities Of 4 Linear Nonphenolic Diarylheptanoids, Şemsi̇ Betül Demi̇r, Hati̇ce Seçi̇nti̇, Nesli̇han Çelebi̇oğlu, Murat Özdal, Alev Sezen, Özlem Gülmez, Ömer Faruk Algur, Hasan Seçen

Turkish Journal of Chemistry

Four linear nonphenolic diarylheptanoids were synthesized and their antibacterial activities were studied. ($S)$-2-Me-CBS-catalysed reduction of alnustone with BH$_{3}$.SMe$_{2}$ gave ($R)$(-)(4$E$,6$E)$-1,7-diphenylhepta-4,6-dien-3-ol, a natural product. Reduction of alnustone with Na in t-BuOH at -15 $^{\circ}$C under NH$_{3}$ atm gave ($E)$-1,7-diphenylhept-5-en-3-one as a Birch-type reduction product. $t$-BuOK catalysed condensation of benzalacetone with propionyl chloride gave (4$Z$,6$E)$-5-hydroxy-1,7-diphenylhepta-4,6-dien-3-one, a natural product. (1$E$,4$Z$,6$E)$-5-Hydroxy-4-phenethyl-1,7-diphenylhepta-1,4,6-trien-3-one, a curcuminoid, was synthesized starting from pentan-2,4-dione in 3 steps. The synthesized chemical compounds were applied against 2 gram-positive bacteria (Bacillus cereus and Arthrobacter agilis), 4 gram-negative bacteria (Pseudomonas aeruginosa, Xanthomonas campestris, Klebsiella oxytoca and Helicobacter pylori), and 1 yeast (Candida albicans) by …

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Extraction Of Heavy Metal Complexes From A Biofilm Colony For Biomonitoring The Pollution, Sedat Sürdem, Haci Mehmet Doğan Jan 2020

Extraction Of Heavy Metal Complexes From A Biofilm Colony For Biomonitoring The Pollution, Sedat Sürdem, Haci Mehmet Doğan

Turkish Journal of Chemistry

An extraction method was tested for biomonitoring the biofilm samples containing heavy metals. The fractionation of metal complexes was performed via C-18-HPLC-ICP-MS and MALDI-MS, respectively. The extraction power of some reagents was determined for the heavy metal extraction from biofilm samples collected in Erdemli coast in the Mediterranean Sea. The ammonium acetate solution giving the highest extraction results was found as a suitable extraction reagent. The concentration and pH of the ammonium acetate solution were optimized and found as 1 M and 5, respectively. The chromatograms of metal complexes with the C-18-HPLC-ICP-MS system were taken to determine the effect of …

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A Novel Fluorimetric Method For Determination Of Pseudoephedrine Hydrochloridein Pharmaceutical Formulations And Blood Serum, Nazli Farajzadeh, Nasrin Ranjbar Nader Jan 2020

A Novel Fluorimetric Method For Determination Of Pseudoephedrine Hydrochloridein Pharmaceutical Formulations And Blood Serum, Nazli Farajzadeh, Nasrin Ranjbar Nader

Turkish Journal of Chemistry

An inexpensive, simple, highly sensitive, and rapid fluorimetric method was developed for the analysis of pseudoephedrine hydrochloride at trace levels. The method is based on the recovery of fluorescence of Rh6G dye due to the interaction of pseudoephedrine hydrochloride with Rh6G-Au NPs complex, which results in the release of Rh6G from the complex and halting fluorescence resonance energy transfer between Rh6G and Au NPs. The intensity of fluorescence was directly proportional to the concentration of the analyte, which was used for its determination. Experimental factors were optimized by response-surface methodology. Under optimum conditions, the calibration curve was linear over the …

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Mesoporous Starch Aerogels Production As Drug Delivery Matrices: Synthesis Optimization, Ibuprofen Loading, And Release Property, Akbar Mohammadi, Jafar Sadegh Moghaddas Jan 2020

Mesoporous Starch Aerogels Production As Drug Delivery Matrices: Synthesis Optimization, Ibuprofen Loading, And Release Property, Akbar Mohammadi, Jafar Sadegh Moghaddas

Turkish Journal of Chemistry

he aim of this work was to prepare biodegradable starch aerogels as drug carriers. The effective parameters in the synthesis and the optimal values of these parameters were determined using Minitab experimental design software. Ibuprofen was selected as a model drug for the dissolution study and loaded into optimized aerogel during the last solvent exchange step. The Fourier Transform Infrared Spectroscopy (FTIR) analysis showed that ibuprofen has been successfully loaded into the aerogel matrix without any effect on the aerogel nature. The drug loading was calculated to be 29%. The isotherm of ibuprofen adsorption into aerogels matrices followed from the …

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2-[(3-Aminoalkyl-(Alkaryl-,Aryl-))-1 H-1,2,4-Triazol-5-Yl]Anilines: Synthesis And Anticonvulsant Activity, Yulya Martynenko, Galina Berest, Nina Bukhtiayrova, Igor Belenichev, Oleksiy Voskoboinik, Sergiy Kovalenko Jan 2020

2-[(3-Aminoalkyl-(Alkaryl-,Aryl-))-1 H-1,2,4-Triazol-5-Yl]Anilines: Synthesis And Anticonvulsant Activity, Yulya Martynenko, Galina Berest, Nina Bukhtiayrova, Igor Belenichev, Oleksiy Voskoboinik, Sergiy Kovalenko

Turkish Journal of Chemistry

The presented work is devoted to the development of synthesis methods for novel 2-[(3-aminoalkyl-(alkaryl-, aryl-))-1$H$-1,2,4-triazolo]anilines. Abovementioned compounds were obtained via hydrazinolysis (Ing-Manske procedure) and acid hydrolysis of corresponding $N$-acylated {([1,2,4]triazolo[1,5-$c$]quinazolin-2-yl)alkyl-(alkaryl-, aryl-)} amines. The regioselectivity of hydrazinolysis and hydrolysis were established. The features of spectral characteristics were studied and discussed. Characteristic patterns of protons signals splitting in $^{1}$H NMR of the synthesized compounds were established. The effect of the synthesized compounds on the pentylenetetrazol seizures was studied. It was found that according to some indicators, anticonvulsant activity of 2-[(3-aminoalkyl-(alkaryl-, aryl-))-1$H$-1,2,4-triazolo]anilines superior or comparable with effect of the reference drug "Lamotrigine". It …

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Comparative Modelling Of A Novel Enzyme: Mus Musculus Leucine Decarboxylase, Ari̇f Sercan Şahutoğlu Jan 2020

Comparative Modelling Of A Novel Enzyme: Mus Musculus Leucine Decarboxylase, Ari̇f Sercan Şahutoğlu

Turkish Journal of Chemistry

Leucine decarboxylase (LDC) is a recently proposed enzyme with no official enzyme commission number yet. It is encoded by the Mus musculus gene Gm853 which is expressed at kidneys, generating isopentylamine, an alkylmonoamine that has not been described to be formed by any metazoan enzyme yet. Although the relevance of LDC in mammalian physiology has not been fully determined, isopentylamine is a potential modulator which may have effects on insulin secretion and healthy gut microbiota formation. The LDC is a stable enzyme that specifically decarboxylates L-leucine but does not decarboxylate ornithine or lysine as its paralogues ornithine decarboxylase (ODC; EC: …

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Improvement Of The Adhesion Of Conductive Poly(M-Toluidine) Onto Chemically Reduced-Wool Fabrics, Meryem Kalkan Erdoğan, Meral Karakişla, Mehmet Saçak Jan 2020

Improvement Of The Adhesion Of Conductive Poly(M-Toluidine) Onto Chemically Reduced-Wool Fabrics, Meryem Kalkan Erdoğan, Meral Karakişla, Mehmet Saçak

Turkish Journal of Chemistry

Wool has disulphide bonds containing-hydrophobic external keratin layers, which act as a barrier for the modification through coating with hydrophilic materials. For that reason, in this work, to ensure a dense and homogenous conductive polymer coating onto the wool, the fabrics were subjected to the reduction process in the aqueous alkaline medium containing agents that can attack these disulphide bonds. Then, one of the polyaniline derivatives, poly($m$-toluidine) (PMT), was coated onto wool by in situ polymerization of $m$-toluidine sulphate using ammonium persulfate (APS) as an oxidant. The effects of conditions, such as the composition of reduction-bath and types of dopants …

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Preparation, Characterization, And Binding Profile Of Imprinted Semi-Ipn Cryogel Composite For Aluminum, Shahnila Shah, Huma Shaikh, Najma Memon, Muhammad Igbal Bhanger, Tahira Qureshi, Humaira Khan, Adi̇l Deni̇zli̇ Jan 2020

Preparation, Characterization, And Binding Profile Of Imprinted Semi-Ipn Cryogel Composite For Aluminum, Shahnila Shah, Huma Shaikh, Najma Memon, Muhammad Igbal Bhanger, Tahira Qureshi, Humaira Khan, Adi̇l Deni̇zli̇

Turkish Journal of Chemistry

Human body is greatly exposed to aluminum due to its high abundance in the environment. This nonessential metal is a threat to the patients of chronic renal disorders, as it is easily retained in their plasma and quickly accumulates in different tissues. Thus, there is great need to remove it from the aqueous environment. In this study, Al$^{3+}$ imprinted semiinterpenetrating polymer network (semi-IPN)-based cryogel composite was prepared and applied for the purification of environmental and drinking water samples from aluminum. Poly (2-hydroxyethyl methacrylate) (pHEMA) discs were produced via cryogenic treatment and imprinted semi-IPN was introduced to the 3-(trimethoxysilyl) propyl acrylate-modified …

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The Use Of Water-Soluble Phthalocyanines As Textile Dyes In Nylon/Elastane Fabric: Fastness And Antibacterial Effectiveness, Armağan Günsel, Ayşe Usluoğlu, Ahmet Turgut Bi̇lgi̇çli̇, Büşra Tosun, Gülnur Arabaci, Meryem Ni̇lüfer Yaraşir Jan 2020

The Use Of Water-Soluble Phthalocyanines As Textile Dyes In Nylon/Elastane Fabric: Fastness And Antibacterial Effectiveness, Armağan Günsel, Ayşe Usluoğlu, Ahmet Turgut Bi̇lgi̇çli̇, Büşra Tosun, Gülnur Arabaci, Meryem Ni̇lüfer Yaraşir

Turkish Journal of Chemistry

This work reports on dyeing of nylon/elastane fabric with water-soluble phthalocyanines (1-4) bearing quinoline 5-sulfonic acid substituents on the peripheral or nonperipheral positions and determining the antibacterial efficiency of the phthalocyanine compounds and the dyed nylon/elastane fabrics. The light, washing, water, perspiration, and rubbing fastness properties of nylon/elastane fabrics dyed with phthalocyanines were also determined. The results showed that all dyed fabrics showed very good wet fastness values. The lightfastness value of the nylon/elastane fabric dyed with phthalocyanine dye (1) showed a much better value than the others. Also, the antibacterial efficiencies of the dyed nylon fabrics and the dye …

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An Anthracene Based Fluorescent Probe For The Selective And Sensitive Detection Of Chromium (Iii) Ions In An Aqueous Medium And Its Practical Application, Erman Karakuş Jan 2020

An Anthracene Based Fluorescent Probe For The Selective And Sensitive Detection Of Chromium (Iii) Ions In An Aqueous Medium And Its Practical Application, Erman Karakuş

Turkish Journal of Chemistry

An anthracene based fluorescent probe, integrated with thiophene moiety, exhibited selective and sensitive detection of chromium (III) ions over other metal ions. Its synthesis was achieved by simple mixing of two commercially available compounds, 2-aminoanthracene, and 2-thiophenecarboxaldehyde, in onestep without the needed complex purification process. The probe molecule (ANT-Th) offered exceptional features such as "turn-on" fluorescence response, low detection limit (0.4 μM), and fast response time (< 1 min) via C$=$N bond hydrolysis. Also, a simple test paper system was developed for the rapid detection of chromium (III) ions with the naked eye.

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A Review: A Comparison Of Different Adsorbents For Removal Of Cr (Vi), Cd (Ii) And Ni (Ii), Anja Pfeifer, Mojca Skerget Jan 2020

A Review: A Comparison Of Different Adsorbents For Removal Of Cr (Vi), Cd (Ii) And Ni (Ii), Anja Pfeifer, Mojca Skerget

Turkish Journal of Chemistry

A review of the studies dealing with the removal of chromium, cadmium, and nickel ions with different adsorbents published in the literature between 2014 and 2018 is given in tabular form, along with the adsorption conditions, adsorption isotherm, and kinetic models applied by the authors to model the experimental data and adsorption capacities. The review focuses on the efficiency of ion removal.

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Evaluation Of A Novel Nanocrystalline Hydroxyapatite Powder And A Solid Hydroxyapatite/Chitosan-Gelatin Bioceramic For Scaffold Preparation Used As A Bone Substitute Material, Sharmin Rahman, Kazi Hanium Maria, Mohammad Saif Ishtiaque, Arijun Nahar, Harinarayan Das, Sheikh Manjura Hoque Jan 2020

Evaluation Of A Novel Nanocrystalline Hydroxyapatite Powder And A Solid Hydroxyapatite/Chitosan-Gelatin Bioceramic For Scaffold Preparation Used As A Bone Substitute Material, Sharmin Rahman, Kazi Hanium Maria, Mohammad Saif Ishtiaque, Arijun Nahar, Harinarayan Das, Sheikh Manjura Hoque

Turkish Journal of Chemistry

Artificially fabricated hydroxyapatite (HAP) shows excellent biocompatibility with various kinds of cells and tissues which makes it an ideal candidate for a bone substitute material. In this study, hydroxyapatite nanoparticles have been prepared by using the wet chemical precipitation method using calcium nitrate tetra-hydrate [Ca(NO$_{3})_{2}$.4H$_{2}$O] and di-ammonium hydrogen phosphate [(NH$_{4})_{2}$HPO$_{4}$] as precursors. The composite scaffolds have been prepared by a freeze-drying method with hydroxyapatite, chitosan, and gelatin which form a 3D network of interconnected pores. Glutaraldehyde solution has been used in the scaffolds to crosslink the amino groups ($\vert $NH$_{2})$ of gelatin with the aldehyde groups ($\vert $CHO) of chitosan. …

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Photochromic And Fluorescence Properties Of Coumarin Fulgimides, Khamis Nassor Ally, Leyla Öztürk, Mahmut Köse Jan 2020

Photochromic And Fluorescence Properties Of Coumarin Fulgimides, Khamis Nassor Ally, Leyla Öztürk, Mahmut Köse

Turkish Journal of Chemistry

Four new fulgimides possessing a fluorescent coumarin unit were synthesized from the corresponding fulgides, and their photochromic as well as fluorescence properties were investigated. The open-ring forms of coumarin fulgimides were found to exhibit fluorescence in the visible region. Upon exposure to UV light, the fulgimides were transformed into the nonfluorescent closed-ring forms, which can be reverted to the initial fluorescent open-ring forms on exposure to visible light. The efficiency of quenching of fluorescence was as high as 95% at the photostationary state of UV irradiation.

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Modeling And Optimization Of Simultaneous Degradation Of Rhodamine B And Acid Red 14 Binary Solution By Homogeneous Fenton Reaction: A Chemometrics Approach, Nasrin Aliasgharlou, Morteza Bahram, Pezhman Zolfaghari, Naiemeh Mohseni Jan 2020

Modeling And Optimization Of Simultaneous Degradation Of Rhodamine B And Acid Red 14 Binary Solution By Homogeneous Fenton Reaction: A Chemometrics Approach, Nasrin Aliasgharlou, Morteza Bahram, Pezhman Zolfaghari, Naiemeh Mohseni

Turkish Journal of Chemistry

This study aimed to propose a mathematical method to investigate and optimize the simultaneous elimination process of multiple organic pollutants using the Fenton process. Hence, the treatment of rhodamine B (RB) and acid red 14 (AR14) dyes in their binary solution was studied. Multivariate curve resolution alternating least square (MCR-ALS), a novel chemometric method, was applied along with correlation constraints to resolute the UV-Vis spectrophotometric data, enabling quantification of investigated dyes despite a high spectral overlapping. Response surface methodology was adopted to assess the model and optimize individual and interactive effects of three independent factors (Fe$^{2+}$, H$_{2}$O$_{2}$ and initial pH) …

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Characterization, Mechanical, And Antibacterial Properties Of Nanofibers Derived From Olive Leaf, Fumitory, And Terebinth Extracts, Ni̇lşen Sünter Eroğlu, Suat Canoğlu, Meti̇n Yüksek Jan 2020

Characterization, Mechanical, And Antibacterial Properties Of Nanofibers Derived From Olive Leaf, Fumitory, And Terebinth Extracts, Ni̇lşen Sünter Eroğlu, Suat Canoğlu, Meti̇n Yüksek

Turkish Journal of Chemistry

In this study, nanofiber structures were obtained with convenient polymers (PVA [polyvinyl alcohol] and PCL [poly º-caprolactone]) derived from the herbal extracts of olive leaves, fumitory, and terebinth plants. Optimum nanofiber structures were identified by measuring viscosity and conductivity values and performing morphological analysis, characterization, and mechanical tests of the prepared solutions. The potential use for wound healing at the most efficient level was determined as a result of antibacterial analysis of the structures obtained. APT (PVA/terebinth) and BFO (PCL/fumitory) nanofibers had the thinnest diameter range and the highest strength values. In terms of the determination of antibacterial effects, nanofiber …

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In Silico Adme Predictions And In Vitro Antibacterial Evaluation Of 2-Hydroxy Benzothiazole-Based 1,3,4-Oxadiazole Derivatives, Afnan Ahmed Alghamdi, Mohammad Mahboob Alam, Syed Nazreen Jan 2020

In Silico Adme Predictions And In Vitro Antibacterial Evaluation Of 2-Hydroxy Benzothiazole-Based 1,3,4-Oxadiazole Derivatives, Afnan Ahmed Alghamdi, Mohammad Mahboob Alam, Syed Nazreen

Turkish Journal of Chemistry

In the present work, a library of fifteen 2-hydroxy benzothiazole-linked 1,3,4 -oxadiazole derivatives have been synthesized and confirmed using different analytical techniques. All of the synthesized compounds have been tested for antibacterial and in silico pharmacokinetic studies for the first time. From the ADME predictions, compound 4 showed the highest in silico absorption percentage (86.77%), while most of the compounds showed more than 70% absorption. All of the compounds comply with the Lipinski rule of 5, suggesting that the compounds possess good drug likeness properties upon administration. Furthermore, all of the compounds follow the Veber rule, indicating good bioavailability and …

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Preparation, Structure Elucidation, And Antioxidant Activity Of New Bis(Thiosemicarbazone) Derivatives, Hasan Yakan Jan 2020

Preparation, Structure Elucidation, And Antioxidant Activity Of New Bis(Thiosemicarbazone) Derivatives, Hasan Yakan

Turkish Journal of Chemistry

Schiff-base-bearing new bis(thiosemicarbazone) derivatives were prepared from terephthalaldehyde and various thiosemicarbazides. FT--IR,$^{\, 1}$H NMR, $^{13}$C NMR, and UV--Vis spectroscopic methods and elemental analysis were used to elucidate the identification of the synthesized molecules. The in vitro antioxidant activity of the synthesized compounds was analysed with the 1,1-diphenyl-2-picryl hydrazyl free-radical-trapping process. The synthesized compounds exhibited lower antioxidant activity than the standard ascorbic acid. IC$_{50}$ values of the synthesized molecules measured from 3.81 $\pm $ 0.01 to 29.05 $\pm $ 0.11 $\mu$M. Among the synthesized compounds, compound 3 had the best antioxidant activity. Moreover, this study explained the structure--activity relationship of the …

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Fluorescent Sensing Platform For Low-Cost Detection Of Cu$^{\Mathbf{2+}}$ By Coumarin Derivative: Dft Calculation And Practical Application In Herbal And Black Tea Samples, Tahi̇r Savran, Abdurrahman Karagöz, Şükri̇ye Ni̇han Karuk Elmas, Duygu Aydin, Furkan Özen, Kenan Koran, Fatma Nur Arslan, Ahmet Orhan Görgülü, İbrahi̇m Yilmaz Jan 2020

Fluorescent Sensing Platform For Low-Cost Detection Of Cu$^{\Mathbf{2+}}$ By Coumarin Derivative: Dft Calculation And Practical Application In Herbal And Black Tea Samples, Tahi̇r Savran, Abdurrahman Karagöz, Şükri̇ye Ni̇han Karuk Elmas, Duygu Aydin, Furkan Özen, Kenan Koran, Fatma Nur Arslan, Ahmet Orhan Görgülü, İbrahi̇m Yilmaz

Turkish Journal of Chemistry

A fluorogenic probe based on a coumarin-derivative for Cu$^{2+}$ sensing in CH$_{3}$CN/H$_{2}$O media (v/v, 95/5, 5.0 \textmu M) was developed and applied in real samples. 3-(4-chlorophenyl)-6,7-dihydroxy-coumarin (MCPC) probe was obtained by synthetic methodologies and identified by spectral techniques. The probe MCPC showed remarkable changes with a ``turn-off'' fluorogenic sensing approach for the monitoring of Cu$^{2+}$ at 456 nm under an excitation wavelength of 366 nm. The response time of the probe MCPC was founded as only 1 min. The detection limit of the probe MCPC was recorded to be 1.47 nM. The binding constant and possible stoichiometric ratio (1:1) values …

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New Sandwich-Type Polymeric Potassium-Dicyanoargentate(I) Complex: Synthesis, Characterization And Enzymatic Activity, Nesri̇n Korkmaz Jan 2020

New Sandwich-Type Polymeric Potassium-Dicyanoargentate(I) Complex: Synthesis, Characterization And Enzymatic Activity, Nesri̇n Korkmaz

Turkish Journal of Chemistry

Coordination compounds containing dicyanoargentate(I) have remarkable biological potential due to their therapeutic antibacterial, antifungal, antibiofilm, and anticancer properties. In this study, a new dicyanoargentate(I)-based complex was synthesized and characterized by various procedures (elemental, thermal, FT-IR for complex) involving crystal analysis of the complex. In addition, the biological activity of this new compound on the acetylcholinesterase (AChE) enzyme, an important enzyme for the nervous system, was investigated. When the infrared (IR) spectrum of the complex is examined, the OH vibration peak resulting from H$_{2}$O molecules in the structure at 3948-3337 cm$^{-1}$ and at 2138 cm$^{-1}$, along with a CN peak coordinated …

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