@article { author = {Ehsan, Muhammad and Sattar, Sumera and Chaudhry, Faryal and Afzal, Farkhanda and Farahani, Mohammad and Cancan, Murat}, title = {Topological analysis of zigzag-edge coronoid graph by using M-polynomial}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {9}, pages = {590-597}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.293152.1193}, abstract = {The chemical graph theory is interrelated with the chemical structure of different compounds. This graph represents the molecule of the sub-stance. A chemical graph is rehabilitated into a real number by applying some mathematical tackles. This number can elaborate on the properties of the molecule. This number is called topological catalogs. Here, we find some topological catalogs via M-polynomial for the zigzag-edge coronoid graph.}, keywords = {Molecular Graph,Nanotube,M-polynomial,zigzag-edge coronoid,Topological indices}, url = {https://www.echemcom.com/article_134628.html}, eprint = {https://www.echemcom.com/article_134628_9707edb8c46a79108d2bfe8503e6ced3.pdf} } @article { author = {Hussien, Hadeel and Al-Messri, Zainab}, title = {Synthesis, characterization and evaluation of 5-alkylidene meldrum’s acid derivatives as multifunction lubricating oil additives}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {9}, pages = {598-605}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.290518.1186}, abstract = {A series of 5-alkylidene Meldrum's acid derivatives were prepared by Knovenagel condensation of Meldrum's acid with different aldehydes in the presence of pipridin as a catalyst. The prepared compounds were characterized by FT-IR, 1HNMR, and 13CNMR. Each prepared compound (0.2% wt. /wt.) was blended with base sixty stock lubricating oil to be evaluated as anti-rust and anti-corrosive additives according to ASTM-D665, and ASTM-D130 respectively. The formulated blend of some compounds showed better anti-rust and anti-corrosion properties compared with the base oil (blank) supplied by the Midland Refineries Company/Iraq.}, keywords = {Meldrum's acid,Knovenagel condensation,Lubricating oil,Anti-rust,anti-corrosion}, url = {https://www.echemcom.com/article_134630.html}, eprint = {https://www.echemcom.com/article_134630_b636700b295686dab6724b8aeccc08a0.pdf} } @article { author = {Abd AL-Zahra, Alaa and Al-Sammarraie, Abdul Kareem}, title = {Hydrothermal synthesis and characterization of zinc sulfide nanoparticles}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {9}, pages = {606-613}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.293399.1196}, abstract = {Zinc sulfide NPs are well-known as excellent photo catalyst because of their unique optical properties such as band gap energy, retention time, the high light absorption, electron-hole recombination time, and high negative reduction-oxidation potential of excited electrons. Nanoparticles of (ZnS) were synthesized successfully from the reaction of a mixture of zinc chloride (ZnCl2) as precursor, ammonium nitrate (NH4NO3) and different concentrations of potassium hydroxide oxide (KOH) with drop wise added thiourea (CS(NH2)2) in a hydrothermal Teflon-lined stainless-steel bomb at temperature of 120 oC. Particle size and surface morphology of the prepared ZnS nanoparticles were calculated using Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM), they show a ZnS spherical particle with diameters around 60 nm. X-Ray diffraction (XRD) revealed a ZnS cubical crystal structure. Fourier transforms infrared (FTIR) spectroscopic analysis show the zinc to sulfur band at 627 cm−1. The absorption spectra of ZnS NPs in the ultraviolet and visible ranges show a blue at λ max of 302 nm.}, keywords = {zinc sulfide nanoparticle,Hydrothermal method,Atomic Force Microscopy (AFM),UV-Visible spectroscopy,X-ray diffraction (XRD),Scanning electron microscopy (SEM)}, url = {https://www.echemcom.com/article_134631.html}, eprint = {https://www.echemcom.com/article_134631_b2e0d2fa47cebe38433955dea53ec0fa.pdf} } @article { author = {Javaraju, Swamy and Ahmed, Hanan and Alsinai, Ammar and Soner, Nandappa}, title = {Domination topological properties of carbidopa-levodopa used for treatment Parkinson’s disease by using φp-polynomial}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {9}, pages = {614-621}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.295039.1203}, abstract = {In medical science, pharmacology, chemical, pharmaceutical properties of molecular structure are essential for drug preparation and design. These properties can be studied by using domination topological indices calculation. In this research work, we establish the topological properties of levodopa-carbidopa drug given to people with Parkinson’s disease by using the domination of topological indices and domination indices. We determine the φP-polynomial for the chemical structures of levodopa a}, keywords = {Molecular Graph,domination indices,φP polynomial,carbidopa-levodopa}, url = {https://www.echemcom.com/article_134652.html}, eprint = {https://www.echemcom.com/article_134652_fe9a6b637ccbf3fe9b514d3b6e2e2afe.pdf} } @article { author = {Sadek, Anas and Baban, Rayah and Al-Habib, May Fadhil and Khazaali, Enas Adnan}, title = {Assessment of serum afamin in patients with preeclampsia at third trimester}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {9}, pages = {622-626}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.293411.1198}, abstract = {Preeclampsia (PE) is a multisystem disorder associated with pregnancy. It is accompanied by a ten percent global neonatal and perinatal mortality rate. Human afamin (AFM) is a glycoprotein which bind vitamin E. It is primarily developed by hepatocytes in the liver and then secreted into the blood. Elevated serum afamin levels have been reported in hypertensive pregnancy complications such as Pregnancy Induced Hypertension (PIH). To evaluate afamin levels in preeclamptic women at third trimester and explore if there is any relation between Afamin and severity of preeclampsia, a case control study was performed in Chemistry and Biochemistry Department, College of Medicine, Al-Nahrain University, Baghdad, Iraq from July 2019 to March 2020. Forty-one patients and 30 participants in control group (normal pregnant women) joined this study. The preeclamptic and normal pregnancies were taken with cluster random sampling method. Afamin (AFM) levels were measured by enzyme-linked immune sorbent assay (ELISA).  Serum afamin (AFM) was significantly (p < 0.05) elevated in pregnant women with preeclampsia 2.34 ±0.23 (ng/mL) compared with that in normal pregnant women group 1.63± 0.19 (ng/mL). Although serum AFM concentration significantly increased in Preeclamptic women, there was no significant association differences between mild and sever groups.}, keywords = {Afamin,preeclampsia,the severity of preeclampsia,third trimester of pregnancy}, url = {https://www.echemcom.com/article_134760.html}, eprint = {https://www.echemcom.com/article_134760_d8b71d10400874f944e73fd3c6a0b736.pdf} } @article { author = {Hosseini Fakhrabad, Azam and Sanavi Khoshnood, Razieh and Abedi, Mohammad Reza and Ebrahimi, Mahmoud}, title = {Fabrication a composite carbon paste electrodes (CPEs) modified with multi-wall carbon nano-tubes (MWCNTs/N, N-Bis (salicyliden)-1,3-propandiamine) for determination of lanthanum (III)}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {9}, pages = {627-634}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.288271.1182}, abstract = {In this work, we introduced the fabrication of a novel modified Carbon Paste Electrode (CPE) for the determination of Lanthanum ion based on Multi-Walled carbon nanotubes. The CPE combination contained paraffin, graphite and N, N-Bus (salicyliden)-1,3-propandiamine (SB-SalPr) that we reemployed in the structure of electrode. After specifying the optimal percentages, this electrode showed the Nernstian response with a slope of 19.37 (mV/decade) to La3+ ion in response time (}, keywords = {Carbon paste electrode,Multi-walled carbon nanotubes,potentiometric,Lanthanum sensor}, url = {https://www.echemcom.com/article_134775.html}, eprint = {https://www.echemcom.com/article_134775_efa87e18e1e4daddba676005d78a6feb.pdf} } @article { author = {Mohammed, Mohanad and Mushatet, Hasan}, title = {The geometric arithmetic (GA) index of certain trees and bicyclic graphs}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {9}, pages = {635-643}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.295046.1204}, abstract = {The geometric arithmetic  index is one of the recently most investigated degree-based molecular structure descriptors that have applications in chemistry. For a graph , the  index is defined as , where  denotes the degree of a vertex  in . In this paper, we obtain the general formulas of geometric arithmetic  index for two types of trees graphs. Also, we provide the general formulas to the bicyclic graphs after attaching branches of  for all vertices. Finally, we computed the geometric arithmetic  index to the molecular graph representing the molecular structure of the bicyclic chemical graphs.}, keywords = {The geometric arithmetic (GA) index,Bicyclic graphs,bicyclic chemical graph,Molecular Graph,tree}, url = {https://www.echemcom.com/article_135211.html}, eprint = {https://www.echemcom.com/article_135211_e78c730f5c9e68e6ccea5ebb0e6fee99.pdf} } @article { author = {Younis, Sarah and Ali, Wathba}, title = {Identification of polyamine compounds and characterization of polyamine oxidase from sheep's brain tissue}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {9}, pages = {644-655}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.291134.1188}, abstract = {The study included partially purified of polyamine oxidase (PAO) from sheep's brain tissue by dialysis and ion exchange chromatography using DEAE-cellulose techniques. Isoenzymes (I and II) were obtained with specific activities 3.876 and 2.856 units/ mg of protein and purification folds 11 and 8 times respectively compared with crude enzyme.The specific activity of PAO I was better than PAO II, thus we considered it for following studying. The optimal conditions were 40ͦ C and pH=9. Some of properties of partially purified PAO I enzyme were studied and the specificity was found to be superior to the substrate, where it was given the highest activity when using spermidine. The results showed the presence of cupper ion at a concentration of 0.1437 mg / mL in PAO I using an atomic absorption. The presence of the coenzyme conjugate flavin adenine dinucleotide (FAD) was also detected by using UV-Vis spectrum from (325-430) nm.  The inhibitory effect of carbamazepine on the activity of homozygous PAO I was studied, and it was found that there was a decrease in the activity of the enzyme at different inhibitor concentrations. The type of inhibition of the drug was also studied, and it was found non-competitive, and that the value of the inhibition constant Ki was 1.8 mM. The polyamines in the crude extract of Sheep's brain were diagnosed with HPLC technique, and the results of the analysis indicated the presence of spermine, spermidine, cadavarin, diamino propane and hexylamine as well as the presence of other polymines.}, keywords = {Polyamine,Polyamine oxidase,sheep's brain tissue,carbamazepine}, url = {https://www.echemcom.com/article_134802.html}, eprint = {https://www.echemcom.com/article_134802_f7ab375c1b39227f4a4171c54c195533.pdf} }