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Article
New Aminocoumain as Corrosion Inhibitor

Author: Yasameen K. Al-Majedy
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2018 Volume: 21 Issue: 2 Pages: 51-56
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

New green organic molecules as corrosion inhibitor namely, 2-amino-4-(4-nitrophenyl)-3-cyano-4, 5-dihydropyrano (3,2-c) coumarin (AND) was synthesized starting from 4-hydroxycoumarin, malonitraile and 4-nitrobenzaldehyde and tested on mild steel (MS) in 1 M HCl media by a weight loss method and identification of the surface technique employee scanning/electron/microscope (SEM) studies. The AND as an inhibitor compound have been elucidate spectroscopically (FT-IR ,1HNMR and 13CNMR) The weight loss investigation demonstrated that inhibition performances have been improved via concentration raising of inhibitor. To support our results scanning electron microscopy was employed to clarify the surface of the MS with and without AND in 1.0 M HCl media. The inhibition performance rate was 96% at the maximum utilized concentration of AND

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Article
Synthesis and Characterization of New 1,2-Dihydropyridine-3-Carbonitrile Compounds with Study of Expected Biological Activity

Authors: Hiba H.Ibraheem --- Yasameen K. Al-Majedy --- Ali J.Salim --- Redha I. Al-Bayati
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2018 Volume: 21 Issue: 2 Pages: 45-50
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

New 1,2-dihydropyridine-3-carbonitrile derivative compounds (3,4) were synthesized by cyclization of ketones (compound (1) and compound (2)) with appropriate aldehydes (4-N, N-dimethylaminobenzaldehyde and 4-chloro-2-oxo-2H-chromene-3-carbaldehyde) in presence of ethyl cyano acetate and ammonium acetate. The new synthesized compounds have been characterized using Melting point, FT-IR spectroscopy and 1H-NMR and 13C-NMR spectrum. The evaluation of biological activity of some synthesized compounds (1-4) with different concentration 10 mg mL−1, 1 mg mL−1 and 0.1 mg mL−1, against two types of bacteria on gram positive bacterial Staphylococcus aureus, Streptococcus pyogenus and gram nagetive bacterial Escherichia coli, Klebsiella pneumniae.


Article
Antioxidant Activity of Coumarine Compounds

Authors: Yasameen K. Al-Majedy --- Hiba H. Ibraheem --- Liblab Sami Jassim --- Ahmed A. Al-Amiery
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2019 Volume: 22 Issue: 1 Pages: 1-8
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Synthesis of coumarins, that were a structurally motivating antioxidant action, was finished in our article. Four components are condensed in the synthesis 4-hydroxycoumarin, 5,5-dimethyl-1,3-cyclohexanedione, and aromatic aldehydes, using tetrabutylammonium bromide (TBAB), diammonium hydrogen phosphate (DAHP), respectively to yield target compounds(1-4). The present methods have advantages, including one-pot synthesis, excellent yields, short reaction times, and easy isolation of product. All catalysts utilized in our study could be reused several times without losing their catalytic efficiency. The structures of the synthesized compounds were elucidating by spectro-scopically methods, Infrared Spectra FT-IR and 1H and 13C Nuclear/Magnetic/Resonance Spectra and elemental analysis techniques, melting point and thin layer chromatography. The scavenging activities of individual molecules were tested vs. stable free radical(1,1-Diphenyl-2-picrylhydrazyl (DPPH)), the results were compared to the Gallic acid. The results show that most of the compounds exhibited higher antioxidant activates than the standards in different concentration range. The highest efficiency scavenging activity was found for compound 2 (88.0±1%) followed by compounds 3 (83±0.5%).The component of the integrated mixes as cell reinforcements was likewise examined.


Article
Study the Pollutants Chlorophenols: Electronic and Physical Properties Relationship
دراسة الملوثات الكلوروفينولية: علاقة الخواص الالكترونية والفيزيائية

Authors: Abdul Hameed M.J. Al Obaidy --- Ahmed A. Al-Amiery --- Rana R. Al-Ani --- Yasameen K. Al-Majedy --- et al.
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 3 Part (B) Scientific Pages: 349-357
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Geometrical optimization and electronic structure of chlorophenols were researched by DFT (B3LYP) utilizing a 3-21G basis set. We have likewise researched the aggregate electronic properties, Highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) and energy gap. The calculated HOMO and LUMO energies demonstrate that charge transfer occurs within the molecule.

تم بحث ودراسة الشكل الهندسي الامثل، والتركيب الإلكتروني للمركبات الكلوروفينولية بوساطة نظرية دالة الكثافة DFT (B3LYP) باستخدام 3-21G كمجموعة الأساس. لقد بحثت كذلك الخصائص الكلية الإلكترونية والاوربتال الجزيئ المشغول الأعلى HOMO والاوربتال الجزيئ الفارغ الأدنىLUMO وفجوة الطاقة.


Article
Antioxidant Activity of 2-Amino-4-(3,4- Dichlorophenyl)-5-oxo-4, 5-Dihydropyrano (3, 2-c) Chromene-3-Carbonitrile Compounds

Authors: Yasameen K. Al-Majedy --- Hiba H. Ibraheem --- Talib K. Abed --- Khalid S. Reda --- et al.
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 2 Part (C) Pages: 179-183
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

- Syntheses of coumarins, which are a structurally interestingantioxidant activity, was done in this article. The modification of 4-hydroxycoumarin by different reaction steps was done to yield targetcompounds. The structures of the synthesized compounds werecharacterized by spectroscopic methods, Infrared Spectra FT-IR and 1Hand 13C Nuclear Magnetic Resonance Spectra and elemental analysistechniques, melting point and thin layer chromatography. The antioxidantactivities of individual compounds were tested against hydrogen peroxide(H2O2) and ferric reducing antioxidant power (FRAP) and the results werecompared to the ascorbic acid and trolox as standards. The results showthat hydrogen peroxide scavenging activity of compounds 2and 3 are higherthan that of the standard, and the values are 81.1±1.0%, and 82.3±1.5%,respectively and the compounds 1 and 4show scavenging activity onhydrogen peroxide with lower value compared with ascorbic acid..

Keywords

antioxidant activity --- coumarin --- H2O2 --- FRAP.

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