Simultaneous electrochemical determination of epinephrine and acetylcholine using modified screen printed electrode
Mohammad Reza
Aflatoonian
Neuroscience Research Center, Kerman University of Medical Sciences, Kerman, Iran; Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
author
Somayeh
Tajik
Research Center for Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran; Neuroscience Research Center, Kerman University of Medical Sciences, Kerman, Iran
author
Behnaz
Aflatoonian
Neuroscience Research Center, Kerman University of Medical Sciences, Kerman, Iran
author
Mehri-Saddat
Ekrami-Kakhki
Esfarayen University of Technology, Esfarayen, Iran
author
Reza
Alizadeh
Department of Chemistry, Faculty of Science, Qom University, Qom, Iran
author
text
article
2020
eng
Electrochemical behaviors of epinephrine and acetylcholine were investigated, using cyclic voltammetry, on the Ag-ZnO modified screen-printed electrode (Ag-ZnO/SPE). Ag-ZnO nanoplates showed excellent electrocatalytic activity toward the oxidation of epinephrine and acetylcholine compared with bare SPE in 0.1 M PBS. Under the optimized experimental conditions, a linear response obtained in the range of 0.13 to 450.00 μM with detection limit of 0.04 μM for epinephrine. Ag-ZnO/SPE exhibits good stability, reproducibility and repeatability, and the method has been successfully applied for detection of epinephrine and acetylcholine in their pharmaceutical and biological samples with satisfactory recovery.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
563
572
https://www.echemcom.com/article_99097_07cce19683a47b5adcffd19d3b03907e.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.1
Electronics structure and optical properties of SrPbO3 and SrPb0.94Fe0.06O3: A first principle approach
Unesco
Chakma
Department of Electrical and Electronic Engineering, European University of Bangladesh, Gabtoli, Dhaka-1216, Bangladesh
author
Ajoy
Kumer
Department of Chemistry, European University of Bangladesh, Dhaka-1216, Bangladesh
author
Kamal Bikash
Chakma
Department of Electrical and Electronic Engineering, European University of Bangladesh, Gabtoli, Dhaka-1216, Bangladesh
author
Md. Tawhidul
Islam
Department of Electrical and Electronic Engineering, European University of Bangladesh, Gabtoli, Dhaka-1216, Bangladesh
author
Debashis
Howlader
Department of Electrical and Electronic Engineering, European University of Bangladesh, Gabtoli, Dhaka-1216, Bangladesh
author
Rasha M. K.
Mohamed
Chemistry Department, Faculty of Science, Assiut University, P.O. Box: 71515, Assiut, Egypt and
Chemistry Department, College of Science, Jouf University, P.O. Box: 2014, Sakaka, Saudi Arabia
author
text
article
2020
eng
Electronic band structures, the total density of state, the partial density of state, and optical properties were investigated using first principle method for SrPbO3 though Generalized Gradient Approximation (GGA) based on the Perdew–Burke–Ernzerhof (PBE0). The band gap was recorded at 0.768 eV. The electron doping happens between similar electronic localized states of atoms in crystals where the section of the quality edge and electron quality of that is with thermally activated. The density of state and partial density of state were simulated for evaluating the nature of 5s, 4d for Sr, 6s, 4f, 5d, 6p for Pb and 2s, 2p for O atom for SrPbO3 orbital travelling with the maximum valance band (MVB) to the minimum conduction band (MCB) to explain the transition of electrons due to hybridization. The optical properties, for instance, absorption, reflection, refractive index, conductivity, dielectric function, and loss function, were calculated, which can account for the superior absorption of the visible light. The key point of this research is to determine the activity on electronics structure and optical properties for Fe doped by 6%. From the band gap and optical properties, SrPb0.94Fe0.06O3 can give more conductivity than that of SrPbO3, showing as a superconductor.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
573
580
https://www.echemcom.com/article_101506_3bf9595ebba2501a0e48f90f1f546c73.pdf
dx.doi.org/10.22034/ecc.2020.101506
The dual role of ammonium acetate as reagent and catalyst in the synthesis of 2, 4, 5-triaryl-1H-imidazoles
Reza
Tayebee
Department of Chemistry, School of Sciences, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran
author
Ali
Gohari
Department of Biochemistry, School of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran
author
text
article
2020
eng
The new findings concerning synthesis of some 2, 4, 5-triaryl-1H-imidazoles is disclosed in the absence of any catalyst. Results indicated that by enhancing the amount of ammonium acetate, an obvious acceleration can be observed in the reaction progress. It is believed that ammonium acetate should be converted to ammonia and acetic acid during the reaction and the produced acid can catalyze the reaction progress. We believe that the observed efficiency for the previously reported catalytic systems has been mainly due to the presence of high molar ratio of ammonium acetate in the reaction medium and presence of auxiliary catalyst only improved the yield%.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
581
586
https://www.echemcom.com/article_101526_6f5b5dc0b769317878082b5c30e79a01.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.3
Synthesis, characterization, and antibacterial activities of some metal complexes with tripodal Schiff base ligand derived from pyrrole-2-carboxaldehyde
Fatemeh
Dashti Rahmatabadi
Department of Inorganic Chemistry, Faculty of Chemistry, Tehran North Branch, Islamic Azad University, 1651153311, Tehran, Iran
author
Roya
Ranjineh Khojasteh
Department of Inorganic Chemistry, Faculty of Chemistry, Tehran North Branch, Islamic Azad University, 1651153311, Tehran, Iran
author
Hassan
Kabiri Fard
Department of Inorganic Chemistry, Faculty of Chemistry, Tehran North Branch, Islamic Azad University, 1651153311, Tehran, Iran
author
Fariba
Tadayon
Department of Inorganic Chemistry, Faculty of Chemistry, Tehran North Branch, Islamic Azad University, 1651153311, Tehran, Iran
author
text
article
2020
eng
The tripodalheptadentate Schiff base ligand, C21H27N7, was derived from pyrrole-2-carboxaldehyde with tris(2-aminoethyl)amine (tren) and its complexes with Cd(II), Co(II), Mn(II) and Ni(II) metal ions have been synthesized. The Schiff base and its metal complexes have been identified by IR, UV-Vis, 1H-NMR, 13C-NMR spectroscopy, elemental analysis and thermo gravimetric analysis (TGA). According to the spectroscopic and elemental analyses data, it was found that the Schiff base was coordinated to the metal ions as a potentially heptadentate ligand. All compounds showed antibacterial properties against the gram-positive bacteria; Bacillus cereus, Staphylococcus aureus, and gram-negative bacteria; Pseudomonas aeruginosa, Escherichia coli by using disc diffusion and micro-broth dilution methods. Also, the metal complexes showed a greater inhibitory effect than their individual ligand. Bacillus cereus was the most susceptible bacterial species to Co(II) complex while Escherichia coli required a relatively higher minimum inhibition concentration of Mn(II) complex.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
587
594
https://www.echemcom.com/article_101743_79e5c1fd57ce20315cbce0b7d1e1e0b8.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.4
Adsorption of lomustin anticancer drug on the surface of carbon nanotube: A theoretical study
Maryam
Afshar
Department of Inorganic Chemistry, Faculty of Chemistry, Tehran North Branch, Islamic Azad University, Tehran, Iran
author
Roya
Ranjineh khojasteh
Department of Inorganic Chemistry, Faculty of Chemistry, Tehran North Branch, Islamic Azad University, Tehran, Iran
author
Roya
Ahmadi
Department of Chemistry, Yadegar-e-Imam Khomeini(RAH) Shahre rey Branch, Islamic Azad University, Tehran, Iran
author
text
article
2020
eng
The present study aimed to assess the adsorption of Lomustin on the single-walled carbon nanotube which has been examined using Density Functional Theory (DFT), agent in a solvent phase (water) at the B3LYP/6-31G (d) theoretical level. Initially, the structures of Lomustin, carbon nanotube, and Lomustin complexes with carbon nanotubes were designed in Gauss View in three different conformers and were optimized geometrically, on which IR and frontier molecular orbital computations were carried out. Adsorption energy values, Gibbs free energy changes (ΔGad), adsorption enthalpy changes (ΔHad), and equilibrium thermodynamic constants were estimated. The results showed that adsorption process was spontaneous, exothermic and non-equilibrium. The values of specific heat capacity and adsorption enthalpy indicate that this nanostructure can be used to build new thermal sensors to measure Lomustin. The results of molecule orbitals estimations showed that energy gap, after drug absorption on the nanotube surface, decreased significantly and the values of chemical hardness and dipole moment were studied after the interaction of drug with adsorbent and the results showed that drug solubility and reactivity, after adsorption on carbon nanotubes, increased significantly. According to the obtained results for adsorption of Lomustin, this nanostructure can be used as a sensing material in building new electrochemical sensors to measure this drug.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
595
603
https://www.echemcom.com/article_101809_924dad49902f9fc9588a1d1de82afaba.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.5
Comparative effect of propofol versus fentanyl in controlling acute renal colic and its hydronephrosis in patients admitted to the hospital
Saeed
Hayati
Trauma and Emergency Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
author
Reza
Yazdani
Trauma and Emergency Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
author
Mohsen
Esmaeili
MD, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
author
Shabnam
Kazemi
Emergency Medicine Specialist, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
author
Seyed Ashkan
Tabibzadeh Dezfuli
Assistant Professor, Trauma and Emergency Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
author
text
article
2020
eng
Background and purpose: Renal colic (RC) is observed in the urinary system and known with sudden and serious pain. Various analgesics are usually used for alleviating pain in the emergency department. This study compared the effect of Propofol with Fentanyl in controlling acute RC of patients admitted to the hospital. Methods: In this study, 150 patients referred to Shahid Mohammadi Hospital (Bandar Abbas-Iran) for the treatment of RC were selected. The basal pain values of the patients were investigated by the Visual Analogue Scale (VAS) that were in range from 0 up to 10 at the 0th, (immediately before drug administration), 15th, and 30th minutes. The zero value shows lack of pain and highest value (10) means the severe pain. Results: The results showed that VAS value was significantly higher in VAS0 compared to VAS10 and VAS30 for all the groups (P<0.05). The results also showed a significant difference between Morphine, Propofol and Fentanyl for VAS10 and VAS30 (P<0.05). The results showed that values for VAS were 3.66, 1.19 and 5.05 for Morphine, Fentanyl and Propofol groups, respectively. The values for VAS30 were 2.85, 1.19 and 3.52 for Morphine, Fentanyl and Propofol groups, respectively. The lowest value was observed for Fentanyl and the highest value was observed in Propofol group for VAS10 and VAS30. Conclusion: The best response was observed in Fentanyl group and it can be recommended using Fentanyl for controlling acute renal colic and its hydronephrosis in patients admitted to the hospital.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
604
608
https://www.echemcom.com/article_101931_c30fc6cd83989a9cc8bb0d301427fd13.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.6
A nano-sensor based on screen printed electrode (SPE) for electro-chemical detection of vitamin B9
Mohammad Reza
Aflatoonian
Research Center for Tropical and Infectious Diseases, Kerman University of Medical Sciences,
Kerman, Iran
author
Somayeh
Tajik
Research Center for Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran; Neuroscience Research Center, Kerman University of Medical Sciences, Kerman, Iran
author
Mehri-Saddat
Ekrami-Kakhki
Esfarayen University of Technology, Esfarayen, Iran
author
Behnaz
Aflatoonian
Neuroscience Research Center, Kerman University of Medical Sciences, Kerman, Iran
author
Hadi
Beitollai
Environment Department, Institute of Science and High Technology and Environmental
Sciences, Graduate University of Advanced Technology, Kerman, Iran
author
text
article
2020
eng
The present study designed an electro-chemical instrument with high sensitivity and selectivity on the basis of a SPE modified with La+3/Co3O4 nano-cubes in order to analyze vitamin B9. It was confirmed that this sensor possesses very good electron-moderating behaviors to oxidize vitamin B9 in a 0.1 M phosphate buffer solution (PBS) (pH=7.0). In addition, according to optimal conditions (pH=7.0), a potential around 110 mV less positive than the one in the un-modified electrodes is required for vitamin B9 oxidation at this electrode surface. This technique limit of determination for vitamin B9 has been estimated to be 0.3 μM (S/N = 3). Responses have been linear in concentrations range between 1.0 and 600.0 μM. The modified electrode has been applied to detect vitamin B9 in real specimens, which was accompanied by acceptable outputs. Experiments showed that La+3/Co3O4 nano-cubes will be valuable electrode materials providing a high ratio of surface to volume that enhances sensitivity. The study introduces a novel sensor with simpleness, quickness, sensitivity, and affordability features to quantify vitamin B9.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
609
618
https://www.echemcom.com/article_102528_f8661263ac89e4296e8e8dfef15ec814.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.7
Molecular dynamics simulation of natural gas sweetening by monoethanolamine
Nima
Novin
Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical sciences, Islamic Azad university, Tehran,Iran
author
Abolghasem
Shameli
Department of Chemistry, Faculty of Science, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran
author
Ebrahim
Balali
Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical sciences, Islamic Azad university, ,Iran
author
text
article
2020
eng
The aim of the study is to investigate sweeting process of sour gas by dynamic simulation of monoethanolamine (MEA) molecule. In the present paper using molecular dynamic simulation, the interaction of sour gas mixture included methane, ethane and H2S with MEA as absorption was also investigated the quantum method DFT B3LYP 6-311 (+) G** was used for electric charge calculation. The simulation results confirmed that the tendency of the H2S molecule is to be absorbed to amine nitrogen and oxygen hydroxyl group in MEA. No tendency for strong interaction between sulfur atoms of H2S molecule and hydrogen of amine or hydroxyl groups was observed. The investigation of changing distance between the hydrogen of H2S and nitrogen/oxygen of MEA confirmed a stable between hydrogen atoms of H2S and nitrogen/oxygen atoms in MEA. Also the investigation of distance changing show movement of hydrogen atoms of H2S molecule which interacted with MEA molecule in the time frame of the simulation. This study was observed that after absorption of H2S molecule by MEA molecules sour of them made the bridge for connection of MEA molecules with each other. Actually H2S molecules after interact with MEA molecules used addition their free hydrogen forinteraction and Making Bridge. Finally a structure of some MEA molecules are joined together, which are stable up to end of the simulation.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
619
625
https://www.echemcom.com/article_103583_624193cd15b7ac625bd5f12b8250459d.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.8
Fe3O4@APTES@isatin-SO3H as heterogeneous and efficient catalyst for the synthesis of quinoxaline derivatives
Sami
Sajjadifar
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran
author
Issa
Amini
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran
author
Ghobad
Mansouri
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran
author
Sattar
Alimohammadi
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran
author
text
article
2020
eng
In this work, an efficient and new Fe3O4@APTES@isatin-SO3Hwas synthesized through immobilization of isatin sulfonic acid on silica modified Fe3O4 nanoparticles. The synthesizedFe3O4@APTES@isatin-SO3Hmagnetic nanoparticles (MNPs) were characterized using the energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), X-ray diffraction (XRD), and thermogravimetric(TGA) analysis. The Fe3O4@APTES@isatin-SO3HMNPs performed efficient catalytic activity as a magnetically recyclable heterogeneous catalyst for one-pot, condensation reaction of 1,2-dicarbonyl compounds and o-phenylen diamines in ethanol at room temperature to afford quinoxaline derivatives.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
626
633
https://www.echemcom.com/article_104092_f079a004c68f8be38bc0affe137b196c.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.9
General fifth M-Zagreb indices and fifth M-Zagreb polynomials of carbon graphite
Abdul Qudair
Baig
Department of Mathematics and Statistics, Institute of Southern Punjab, Multan, Pakistan
author
Muhammad
Naeem
Department of Mathematics, The University of Lahore, Pakpattan Campus, Pakistan
author
Wei
Gao
School of Information Science and Technology, Yunnan Normal University, Kunming, China
author
Jia-Bao
Liu
School of Mathematics and Physics, Anhui Jianzhu University, Hefei 230601, P.R. China
author
text
article
2020
eng
Graph theory plays a vital role in modeling and designing any chemical structure or chemical network. Chemical graph theory helps to understand the molecular structural properties of a molecular graph. The molecular graph is a graph consisting of atoms called vertices and the chemical bond between atoms called edges. In this paper, we have computed the various types of degree-based fifth M-Zagreb indices, general fifth M-Zagreb indices, fifth hyper-M-Zagreb indices, general fifth M1-Zagreb polynomial, general fifth M2-Zagreb polynomial, fifth M1-Zagreb polynomial and fifth M2-Zagreb polynomial, fifth hyper-M1-Zagreb polynomial, fifth hyper-M2-Zagreb polynomial and fifth M3-Zagreb index and their polynomials of a molecular graph namely carbon graphite denoted by CG(m,n) for t-levels.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
634
640
https://www.echemcom.com/article_104189_841c20ce00e1037ab5f75f23a5204874.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.10
On ve-degree atom-bond connectivity, sum-connectivity, geometric-arithmetic and harmonic indices of copper oxide
Murat
Cancan
Faculty of Education, Van Yüzüncü Yıl University, Van, Turkey
author
Süleyman
Ediz
Faculty of Education, Van Yüzüncü Yıl University, Van, Turkey
author
Mohammad Reza
Farahani
Department of Applied Mathematics, Iran University of Science and Technology, Narmak, 16844, Tehran, Iran
author
text
article
2020
eng
Topological indices are important tools to modeling chemical properties of molecules. ve-degree based atom-bond connectivity, sum-connectivity, geometric-arithmetic, and harmonic indices are defined as their corresponding classical degree based counterparts recently in chemical graph theory. In this study we investigate ve-degree atom-bond connectivity, sum-connectivity, geometric-arithmetic, and harmonic topological properties of copper oxide.We calculate exact values of these novel topological indices for copper oxide and give closed formulas.
Eurasian Chemical Communications
Sami Publishing Company (SPC)
2717-0535
2
v.
5
no.
2020
641
645
https://www.echemcom.com/article_104702_20d30d5fd36b1791b8e38982e4f7dc5a.pdf
dx.doi.org/10.33945/SAMI/ECC.2020.5.11