National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101A Novel Green Continuous Dyeing of Polyester Fabric with Excellent Color Data1146831210.21608/ejchem.2020.22055.2318ENNahedAhmedDyeing, Printing and Textile Auxiliaries Department, Textile Research Division, National Research Center, Dokki, Giza, 12622, EgyptSaharNassarTextile Research Division, National Research Centre, Cairo, EgyptFayzaKantouchTextileDivision, Dyeing, printing and auxiliaries department, National Research center, Dokii, Cairo, EgyptRedaM El-ShishtawyKing Abdulaziz University
Location
Jeddah, Saudi Arabia
Department
Department of ChemistryJournal Article20200106Polyester fabrics are conventionally dyed mainly at either high temperature and high pressure or normal pressure using a toxic carrier. These harsh method not only energy consuming but as well affects the environment severely. Thus, for cleaner production and with an eye on energy saving, a green and ecological viable and sustainable continuous dyeing process were developed for polyester fabrics using aqueous polyethylene glycol (PEG). Polyester fabrics were dyed with CI Disperse Blue 56 in a continuous process by padding the fabric in an aqueous solution of PEG10000 with 100% pick-up. Different factors that may affect the dyeability of polyester fabrics, such as PEG water ratio, drying time and method, curing temperature and time, were investigated. The selected conditions obtained were applied using four disperse dyes; namely, CI Disperse Blue 56, CI Disperse Red 50, CI Disperse Red 343, and CI Disperse Orange 29. A tentative mechanism is suggested for the role of PEG10000 in the dyeability of polyester fabrics that relies on nanodispersed dye together its action as a fiber plasticizer and swelling agent. The excellent color data, levelling and fastness properties of the dyed fabrics using this facile method suggest its potential as a viable and ecological alternative for carrier-atmospheric dyeing and high-temperature dyeing of polyester fabrics with great potential for application to a broad range of synthetic fibers.https://ejchem.journals.ekb.eg/article_68312_e6115919ba07b050482db88f5fb57bff.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Investigation and Evaluation of Poly (n- butyl acrylate) for Oil Fractions Spill Removal Applications15256352610.21608/ejchem.2019.18638.2150ENSalahAbdellah AliChemistry Department, College of Science and Arts, Jouf University, Al-Qurrayat, Saudi ArabiaMaterials Science Department, Institute Of Graduate Studies & Research, Alexandria University, EgyptW KHassanMaterials Science Department, Institute Of Graduate Studies & Research, Alexandria University, EgyptJournal Article20191024This work is aiming at investigating the preparation and characterization of n-butyl acrylate (BA) to be used in oil spill removing applications. N-Butyl Acrylate was prepared by solution polymerization taking into account the effect of monomer concentration, polymerization time, initiator concentration, cross-linker concentration and polymerization temperature on the yield of n- butyl acrylate to optimize the polymerization conditions. Thermal analysis has been done using thermogravimetric analysis (TGA) in the range of 25oC to 600oC and differential scanning calorimetry (DSC) in the range of 35oC to 400oC. The results showed that n- butyl acrylate is thermally stable to satisfy the requirements of oil spill cleanup applications. The chemical structure of n- butyl acrylate was confirmed using Fourier Transform Infrared analysis (FTIR). The morphology of n- butyl acrylate that controls its ability to absorb oil spills was observed using scanning electron microscope (SEM). It was found that n-butyl acrylate has the ability to absorb gasoline, kerosene, diesel, xylene, octanol and Mobil oil. Sorption capacity of the polymer in dry system, static system and dynamic system in addition to its reusability of sorbent several times were studied.https://ejchem.journals.ekb.eg/article_63526_0ff3fee2d4b1460265b2337da8fb0243.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Nonwoven Nylon-6 Functional Filters for Protection from Air Pollutants27363449710.21608/ejchem.2019.6815.1570ENSamy ElsebaieShalabyProteninic &amp; Manmade Fibers Department, Textile Research Division, National Research Centre, Dokki, Cairo, Egypt0000-0003-3148-2877Naser GadAl-BalakocyProteinic &amp; Man made fibers0000-0002-8597-3308Yasser HassenIbrahiumEnvironmental Division ,National Research Centre0000-0002-3032-0705Samiha MohamedAbo El -OlaProteinic and Man Made Fibres ,Textile Research Division ,National Research Centre0000-0002-3852-3320MargritaBilyakovaPreparation and finishing of cellulose fibers departmentJournal Article20181223The present work aims to assess the effectiveness of Nylon-6 nonwoven fabrics containing antimicrobial substance (AS) and grafted with poly methacrylic acid (PMAA), polydimethylaminoethylmerthacrylate (PDMAEMA) and the blended fabric containing the above mentioned two types of nonwoven fabrics for air and gas filtration. The efficiency of the textile filters on the removal of anions and cations pollutants from the atmosphere of the selected indoor sites were studied under the normal conditions in the indoor environment. Air samples were collected before and after fitting the three tested types of textile nonwoven filters. The absorption method was used for collecting the gaseous pollutants, SO2, NO2 and NH3, before and after filtration. The removal efficiency % of each filter was calculated. Nonwoven fabric containing 1:1wt/wt from two types of nonwoven fabrics showed high removal efficiency when applied for the collection of suspended anion and cation particulates. <br />Key words:https://ejchem.journals.ekb.eg/article_34497_efbfb634b309f0cf84842bee1ff3392e.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Preparation and Utilization of Fixing Agents for Dyed Cotton Fabrics37506352010.21608/ejchem.2019.18102.2103ENMohamedEl-MollaFaculty of Science & Arts, Chemistry Department, Jouf University; El-Qurayayt Kingdom Saudi Arabia.Textile Research Division, National Research Centre El- Bohouth St., Dokki, Giza, Egypt.P.O.12622.0000-0002-5097-6904M.HelmyFaculty of science-Helwan University, Helwan, Cairo, Egypt.F. Abd-ElazizEl-MahdeyDepartment of quality, Industrial Authority Administration, Cairo, Egypt.Journal Article20191012Preparation of new cationic fixing agents and their utilization after dyeing cotton fabrics using reactive and direct dyes are studied. Both stock solution which used in preparation of fixing agents and prepared fixing agent are analyzed to detect the percent of nitrogen, carbon and hydrogen atoms. The application of the prepared fixing agents after dyeing cotton fabrics either using reactive or direct dyes are investigated. The newly prepared fixing agents could be successfully used for fixing different types of dyes and in general their points possess color strength value comparable or even higher to those obtained upon using selected commercial fix.https://ejchem.journals.ekb.eg/article_63520_32ea0c39a6971c39a4cff2cef94e222b.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Chemical Composition of the Santolina pectinata Lag., essential oil from Morocco: Identification of (Z)-heptadeca-10,16-dien-7-one as a new natural component51584665910.21608/ejchem.2019.14941.1908ENMounirManssouriUniversit&eacute; My Ismail, Laboratoire des Substances Naturelles &amp; Synth&egrave;se et Dynamique Mol&eacute;culaire, Facult&eacute; des Sciences et Techniques, BP 509, 52003, Errachidia, Moroccohttps://orcid.org/00AbdeslamAnsariUniversité My Ismail, Laboratoire des Substances Naturelles & Synthèse et Dynamique Moléculaire, Faculté des Sciences et Techniques, BP 509, 52003, Errachidia, MoroccoMohamedZniniUniversité My Ismail, Laboratoire des Substances Naturelles & Synthèse et Dynamique Moléculaire, Faculté des Sciences et Techniques, BP 509, 52003, Errachidia, MoroccoLhouMajidiUniversité My Ismail, Laboratoire des Substances Naturelles & Synthèse et Dynamique Moléculaire, Faculté des Sciences et Techniques, BP 509, 52003, Errachidia, MoroccoJeanCostaUniversité de Corse, CNRS-UMR 6134, Laboratoire de Chimie des Produits Naturels, BP 52, 20250 Corti, FranceJournal Article20190718ABSTRACT <br /> Essential oil of Santolina pectinata lag. aerial parts was obtained by hydrodistillation and analyzed, for the first time, by using gas chromatography and gas chromatography-mass spectrometry (GC-MS (EI)). 33 components were identified which a non terpenic oxygenated compound i.e., (Z)-heptadeca-10,16-dien-7-one strongly dominated the oil composition with 28%. The structure of this natural compound was determined for the first time by a Positive electro spray ionization time-of-flight mass spectrometry (ESI (+) -TOF-MS, one-dimensional and two-dimensional nuclear magnetic resonance spectroscopy.https://ejchem.journals.ekb.eg/article_46659_8a732cfa3d3be7b38e6cee7e8ab6b28e.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Properties and Green Applications Based Review on Highly Efficient Deep Eutective Solvents59694026410.21608/ejchem.2019.12604.1782ENAleenaUmarDepartment of Chemistry, University of Agriculture Faisalabad-38000, PakistanMamoonaMunirDepartment of Plant Sciences, Quaid-i-Azam University Islamabad-45320, PakistanMuhammad AsadRiazDepartment of Chemistry, Quaid-i-Azam University Islamabad-45320, PakistanMaidaMurtazaDepartment of Chemistry, Quaid-i-Azam University Islamabad-45320, PakistanRidaSultanaDepartment of Physics, Government College Women University, Faisalabad-38000, PakistanGokul RaghavendraSrinivasanResearch Coordinator, Bharath Institute of Higher Education and Research, Chennai, India0000-0002-9836-4851AswaFirdousDepartment of Chemistry, Quaid-i-Azam University Islamabad-45320, PakistanMuhammadSaeedDepartment of Chemistry, Quaid-i-Azam University Islamabad-45320, PakistanJournal Article20190508Deep eutectic solvents (Ionic liquids)(DESs), a new type of low cost and eco-friendly solvent, have fascinating rising interest in chemistry. To recapitulate the properties and significance of deep eutectic solvents (DESs), this review focus on characteristics of deep eutectic solvents, as well as their applications in electrochemistry, catalytic activity, biodegradability, bio-catalysis, as aromatic hydrocarbons, extraction and separation. The existing data and references are appraisal to go over the developments of DESs.https://ejchem.journals.ekb.eg/article_40264_9bf834f744a2b442c8a3998c20388234.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Fabrication and Characterization of (PVA-TiO2)1-x/ SiCx Nanocomposites for Biomedical Applications71834111810.21608/ejchem.2019.10712.1695ENAhmedHashimUniversity of BabaylonHayderAbduljalilUniversity of BabylonHindAhmedUniversity of BabylonJournal Article20190317The structural, electrical and electronic properties of (PVA–TiO2-SiC) nanocomposites for antibacterial application have been investigated with low cost, low weight and high activity for antibacterial. The (PVA–TiO2-SiC) nanocomposites were prepared with different concentrations of (PVA–TiO2) nanocomposites and silicon carbide (SiC) nanoparticles. The casting method was used to prepare the (PVA–TiO2-SiC) nanocomposites. The silicon carbide nanoparticles were added to the (PVA–TiO2) nanocomposites with concentrations (x) are (1.5, 3,4.5 and 6) wt.%. The electrical properties of (PVA–TiO2-SiC) nanocomposites were studied at different temperatures. The results showed that the SiC nanoparticles form a paths network inside the (PVA–TiO2) nanocomposites at concentrations (4.5 and 6) wt.%. The conductivity (PVA–TiO2-SiC) nanocomposites is increased with increase of silicon carbide (SiC) nanoparticles concentrations from 4×10-11 (Ω. cm)-1 to 7.4×10-11 (Ω. cm)-1. The activation energy of (PVA-TiO2-SiC) nanocomposites decreases with the increase of silicon carbide nanoparticles concentrations from (0.76 eV) to (0.703 eV) when the silicon carbide nanoparticles concentrations increase from (0-6) wt.%.. The total energies of the (PVA–TiO2-SiC) nanocomposites were studied by using Gaussian 09(G09) program and density functional theory (DFT) with B3LYP/6-31G) basis set. The total energies decrease with increase the number of atoms. The (PVA–TiO2-SiC) nanocomposites tested for antibacterial applications against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) by using a disc diffusion method. The results showed that the prepared nanocomposites have good antibacterial activity.https://ejchem.journals.ekb.eg/article_41118_6ffe3c5461a3e1e713f3564e89c06192.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Functional Finishing of Polyester Fabric Using Bentonite Nano-Particles85996689610.21608/ejchem.2019.20404.2223ENAmiraAbou El-KheirTextile Research Division, Proteinic and Man-made Fibres Departments, National Research Centre (NRC)0000-0003-4344-769XNahedAbd El-GhanyFaculty of Science, Cairo University
Chemistry DepartmentMona M.FahmyFaculty of Science, Cairo University
Chemistry DepartmentSaraAborasMaster Student, Faculty of Science, Cairo University, Chemistry DepartmentLamiaaEl-GabryTextile research division, proteinic and Man-made fibres departments, National Research Centre (NRC)0000-0002-6336-1554Journal Article20191202This work is devoted to increase the functional properties of polyester fabric such as UPF, moisture regain, tensile strength at break and dyeability towards basic dye. To achieve this purpose polyester fabric were modified with different concentrations bentonite nano-particles (BNPs) using pad – dry curing technique and IR dyeing machine. The effect of the (BNPs) on the physical and mechanical properties of the treated fabrics such as moisture regain, tensile strength at break, elongation percentage and thickness were investigated. Topographical investigation of the said nano-particles was conducted using transmission electron microscopy (TEM). The surface morphology and surface chemical elements of the treated as well as the untreated fabrics were investigated using field emission scanning electron microscopy and dispersive X-ray spectroscopy, respectively. FTIR, thermogravimetric analysis and UPF of the treated polyester fabrics compared to the untreated one were assessed. The colour strength of dyed polyester fabrics with both disperse and cationic dyestuffs as well as the fastness properties were evaluated. Excellent results of the treated fabrics toward physical and coloration properties were obtained.https://ejchem.journals.ekb.eg/article_66896_c2bda91a1f6d6416f396666cdb910778.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Synthesis, Characterization, and Biological Applications of New Series of Azo Triazole Organometallic Derivatives and Their Silver Nanoparticle Forms1011155250510.21608/ejchem.2019.17073.2046ENTaghreedHusienAin shams universityAsmaaAboelnagaAin shams university faculty of science chemistry departement0000-0003-1902-7847Journal Article20190917Some metal salts can react with 3-amino-1,2,4-triazole derivatives as Ni(II) acetate, Co(II) acetate and Cu(II) acetate afforded metallated products Ia-d, IIa-d and IIIa-e in the form of monometal, dimetal, and metal bis products. Elemental analyses, IR, 1H NMR, 13C NMR and mass spectral elucidated the structures of the newly synthesized compounds.<br /> Some of the azo metal compounds were treated with silver nanoparticles. Transmission electron microscopy is used to determine the morphology and particles size via TEM image of nanoparticles and nano form of compounds. The antimicrobial activity of the recently synthesized compounds and its nano form has been measured against gram positive and gram negative bacteria and fungi.https://ejchem.journals.ekb.eg/article_52505_c68e47314f70b4bfaaa3a58985f77345.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Improvement Properties of EPDM Rubber Using Hybrid Chitin/Clay Filler for Industrial Products1291434392110.21608/ejchem.2019.12736.1788ENAman IKhalafDr. Aman Ibrahim Khalaf
Polymers and Pigments Dept.
National Research Center
Dokki, Cairo, Egypt
Mobile: +20124342459Fahima MHelalyPolymers and Pigment, National Research Centre, Cairo0000-0003-2255-7929SanaaEl SawyPolymers and Pigments, National Research Centre, Giza, EgyptJournal Article20190515This work deals to synthesis chitin from Shrimp shells, that were collected from the local market scraped, washed, and ground. Deproteinization and decalcification process were applied on the ground shells to obtain pure chitin that identified and characterized by FTIR spectra, thermogravimetric analysis and scanning electron microscope SEM. The rubber compounds were prepared by incorporation of chitin as biomaterial and the other additive as curative system in ethylene propylene diene monomer (EPDM) rubber matrix using the laboratory two-roll mill. The rheological characteristics were tested using oscillating disc rheometer. The physico-mechanical properties of the prepared rubber vulcanizates before and after exposure to thermal oxidative ageing swelling properties, water uptake and chitin dispersion in rubber were investigated. It was found that at 5 phr of chitin the value of tensile strength of EPDM/chitin vulcanizates has higher value than the other concentrations of chitin. While the modulus at 50 % elongation and hardness increased with increasing chitin concentration. The samples containing 5 and 10 phr chitin show good thermal stability. Also, the effect of nanoclay concentration (3,5,7 and 10 Phr) as binary hybrid filler properties of EPDM rubber were evaluated. It was observed that, the rheological characteristics and the physico-mechanical properties were improved due to apply nanoclay as binary hybrid filler with chitin.https://ejchem.journals.ekb.eg/article_43921_0d9325f84cb002552cce9d018d21fcc0.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101The Enhancement of the Functional Properties of Polyester Microfiber Single Jersey Using Some Nano-materials1451545367710.21608/ejchem.2019.2868.1804ENZienab M.ElgoryClothing &amp; Knitting Industrial Research Department, Textile Research Division, National Research Centre (NRC), Giza, 12622, EgyptKhaled M.SeddikClothing and Knitting Industrial DepartmentManarYahiaNational Research Centre, Clothing and Knitting Industrial Department, Textile Research Division &ndash; Dokki &ndash; Giza &ndash; Egypt &ndash; P.O.12622.Lamiaa KamalEl-GabryNRC, Textile research division, proteinic and Man-made fibres departments0000-0002-6336-1554Journal Article20190520Abstract<br /> In this study knitted single jerseysamples by polyester microfiber (150/288) yarn countwere manufactured. Threedifferent machines gauge (20-24-28) was performed. The polyester knittedfabrics were treated with nano clay and nano silica with twoconcentrations (1.5% &3%). The samples specifications as stitch length, stitch density and tightness factor were measured while weight, thickness, bursting, UPF, air permeability and stiffness properties were tested.The treated polyester samples dyed with dispersing dyes and the fastness properties were carried out. Furthermore, FTIR was determined to characteristics the modified fabrics and the moisture regain% of samples was estimated. The result presented that the nature of nano treatment plays a striker role in the functional properties of knitted samples as well as although the result referred to improving in samples characteristics and the air permeability were detected. In addition, depending on the radar area, nano silicon dioxide more effective than a nano-clay treatment with different concentrations and the knitting machine gauge (24) offered the highest rating.https://ejchem.journals.ekb.eg/article_53677_f314fe858475b993a7d9a6746b8f0073.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Identification and Investigation of the Chelating Activity of Some Phenolic Polymers Derived from Mefenamic Acid1551694532610.21608/ejchem.2019.13353.1836ENTahseenAl-MathkuriDepartment of Chemistry, College of Science, University of Miasn, Maysan, IraqJassimAl-HilfiDepartment of Chemistry, College of Science, University of Miasn, Maysan, Iraq0000-0001-6230-2715HamidAl-JuboriGeneral Science Department, College of basic/ Sharqat, Tikrit University, IraqJournal Article20190607New phenol formaldehyde resin synthesized from malty steps, the first step converts mefenamic acid to their ester ethyl 2-((2,3-dimethylphenyl) amino) benzoate (T1) by reaction with ethanol catalyzed by sulfuric acid as a catalyzed. The hydrazide derivatives 2-((2,3-dimethylphenyl) amino) benzohydrazide (T2) prepared through the reaction ester(T1) with hydrazine hydrate in ethanol. Third step Prepared of some Schiff bases phenolic [T3-T5], (E)-2-((2,3-dimethylphenyl) amino)-N'-(4-hydroxy-2-methylbenzylidene) benzohydrazide (T3), (E)-2-((2,3- dimethylphenyl) amino)-N'-(3-hydroxy-2-methoxybenzylidenebenzohydrazide(T4) and(E)-N'-(2,4-dihydroxy-6-methylbenzylidene)-2-((2,3-dimethylphenyl) amino) benzohydrazide (T5) finally prepared the phenol formaldehyde resins [T6-T7], The chelating ability of these polymers was studied to extract some metallic ions such as Co+2, Fe+3, Ni+2 by using batch equilibrium method. The different factors are studied, loading capacity, PH and time. All the synthesized compounds were characterized by using by various spectroscopic techniques such as FTIR, 1HNMR as well as DSC.https://ejchem.journals.ekb.eg/article_45326_a47c9c22a7d176d87068434033eb5140.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Synthesis, Antimicrobial, and Docking Investigations of Remarkably Modified Sulfathiazole Derivatives1711844476510.21608/ejchem.2019.13909.1862ENSamir T.GaballahDepatment of Photochemistry, National Research Centre, Dokki, Giza, Egypt0000-0003-0239-5539H.AmerDepartment of Chemistry of Natural and Microbial Products, National Research Centre, El-Buhoth St, Dokki 12622, Giza, EgyptA.Hofinger-HorvathDepartment of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, AustriaM.Al-MoghazyFood Sciences & Industry Division,National Research CentreM. I.HemidaChemistry Department, Faculty of Science, Benha University, Benha-Egypt.Journal Article20190623Some new sulfathiazole derivatives were synthesized. The sulfathiazole starting material was reacted with ethyl bromoacetate and gave unpredictably an ester product 2. The substitution occurred selectively at the tautomeric proton of the NH thiazolyl nitrogen rather than the aromatic NH2 protons. The ester was further hydrazinolysed followed by condensation with several aldehydes to establish hydrazones (4a-h). Hantzesch thiazole synthesis was also applied to build antimicrobial agents containing multi-thiazole moieties. The structures of the synthesized compounds were confirmed by 1H, 13C, 2D 1H NMR, MS, and microanalyses. The synthesized compounds were tested for their antimicrobial activity towards Gram-positive and Gram-negative bacteria, and fungi strains. Some of the investigated compounds showed prominent high potency. The docking study revealed the mode of action between the modified sulfathiazole ligands and the binding site of DHPS.https://ejchem.journals.ekb.eg/article_44765_8cb1b841683a17d502227752a89c2f48.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Design and Facile Synthesis of New Bioactive C-glycosidic Semi-Natural Compounds1851954511810.21608/ejchem.2019.14209.1875ENGalal Abd El-MoeinNawwarGreen chemistry department, National Research CentreMaherAl-HashashChemistry Department, Faculty of Science, Ain-shams UniversityRanda HelmySwellamgreen chemistry department, National Research CentreHoda SabryOthmanGreen Chemistry department, National research centreJournal Article20190701Objective: The presented work aims to synthesize new bioactive molecules of wide spectrum biological activity. In this study, a new series of α,β unsaturated ketones having acylic sugar residue was synthesized along with their hydrazone analogues. <br /> Methods: Those new compounds were obtained via mild condensation reactions to avoid side products and were investigated by spectral analysis including IR, 1HNMR,13CNMR and mass spectrometer. In addition, they were tested and evaluated as antimicrobial and antioxidant agents.<br /> Novelty: Results revealed that compound 2d is the most promising antimicrobial agent among the tested compounds and it even exceeds the activity of the used standard antibacterial drug Ampicillin as well as it competes with the standard antifungal drug Amphotericin B. On the other hand, compound 3b shows potent antioxidant activity in comparison with the used standard drug Trolox. Structure-activity relationship is also discussed.https://ejchem.journals.ekb.eg/article_45118_c969a2a11ff9a16d9ab019d1388f2a3c.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Slit Width Effect on Signal-to-noise Ratio in Spectrophotometric Measurements1972014592010.21608/ejchem.2019.14559.1884ENAlaaeldinAbdelmageedPhotometry and Radiometry Division, National Institute of Standards (NIS), Egypt0000-0002-7279-2786EssamElmoghazyPhotometry and Radiometry Division, National Institute of Standards (NIS), Egypt.FatmaEl-SharkawyPhotometry and Radiometry Division, National Institute of Standards (NIS), Egypt0000-0002-2552-7250Journal Article20190709Signal-to-noise (S/N) ratio theory has proven to be useful in understanding, designing, and optimizing spectrophotometric measurement systems. Although a narrower spectral bandwidth does improve the resolution of closely spaced peaks, it also decreases the Signal-to-noise ratio. The narrowest slit width should be used that will yield an acceptable Signal-to-noise ratio. In this research, the wavelengths of peak absorbance of the holmium glass filter were determined to attain the optimum Signal-to-noise ratio accompanied with spectral bandwidths of 0.1 nm, 0.2 nm, 0.5 nm, 0.8 nm, 1 nm, 2 nm, 3 nm and 5 nm. The influence of spectral bandwidth on the Signal-to-noise ratio was by far the most important parameter affecting the location of the measured wavelengths of absorbance or transmittance of the sample.https://ejchem.journals.ekb.eg/article_45920_03845d24d322b57e5cb79d7326c94c4b.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Bioactivities and Phytochemical Studies of Acrocarpus fraxinifolius Bark Wight Arn2032145819010.21608/ejchem.2019.15114.1917ENHanaa M.El-RafiePharmacognosy Department, Pharmaceutical and Drug Industry, National Research Center0000-0003-1230-0601Reda S.MohammedPharmacognosy Department, Pharmaceutical and Drug Industry, National Research Center0000-0002-8838-9027Aisha H.Abou ZeidPharmacognosy Department, Pharmaceutical and Drug Industry, National Research Center0000-0001-7807-9722Amany A.SleemPharmacology Department, National Research CenterJournal Article20190722Acrocarpus is a genus of flowering plants in the legume family Fabaceae which considered as a large and economically important family. This study aimed to carry out the biological activity screening on the total ethanol and successive extracts of Acrocarpus fraxinofolius (A. fraxinofolius) bark, for the first time. The biological activity studied embraced, management of diabetes in alloxan induced diabetic rats, cytotoxic activity against four human tumor cell lines and hepatoprotective activity against CCl4-induced hepatotoxicity in rats and the activity was studied by assaying the serum marker enzymes like AST, ALT, and ALP. Concerning this, the petroleum ether extract (PEE) showed the most bioactive extract where, the anti-diabetic activity exhibited by 100mg of PEE extract was 74.38% relative to metformin. It also showed a significant anti-proliferative activity against MCF-7 (IC50=2.35µg), Hela (IC50=3.85µg) and HEPG-2 (IC50=9.54µg) compared with Doxorubicin as reference drug. The hepatoprotective activity of the PEE was evidenced by a significant decrease in the liver function enzymes, i.e. AST, ALT and ALP by 29.18%, 28.26%, and 34.11%, respectively, using silymarin as the reference drug, compared to their concentration levels in an untreated group with liver damage induced by CCl₄. Based on the above outcomes, further phytochemical investigation including GC/MS analysis of its fractions, GLC analysis of its sterol fraction, column chromatography and TLC fractionation of PEE to separate its bioactive compounds were conducted.https://ejchem.journals.ekb.eg/article_58190_03a47731d6f698f3e2e33ca754ec21b7.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Enhanced Stability of Refined Soybean Oil Enriched with Phenolic Compounds of Olive Leaves2152245369110.21608/ejchem.2019.16592.2010ENHamdyZahranFats and Oils Dept., Food Industries and Nutrition Division, National Research Centre, Dokki, Cairo, Egypt0000-0003-2500-8378ZahraNajafiIstanbul Technical University, Faculty of Chemical and Metallurgical Engineering Department of Food Engineering, Istanbul, TurkeyJournal Article20190904Soybean oil is a common vegetable oil, which is used for edible purposes. However, this oil is rich in unsaturated fatty acids that enhance oil deterioration by their oxidation. Such deterioration can be reduced using suitable antioxidants, preferably natural antioxidants. This work was made to assess the suitability of phenolic compounds that can be extracted from olive leaves to improve soybean oil stability against oxidation. Olive leaves extracts were tested for their content of phenolic compounds and have been then added to soybean oil which was subjected to accelerated oxidation. The oxidation stability was monitored following several technical methods commonly used for this purposes such as peroxide value, p-Anisidine value, as well as induction time by Rancimat method. The results have proved that the extracts of olive leaves can be used efficiently as a safe natural antioxidant in edible oils. However, the dose to be added should be adjusted as to achieve the activity of synthetic antioxidants.https://ejchem.journals.ekb.eg/article_53691_15735256551b8dd2189d73f1de1fa8d2.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Synthesis, Antimicrobial, Antioxidant and Docking Study of Novel 2H-1,4-Benzoxazin-3(4H)-One Derivatives2252385818810.21608/ejchem.2019.16920.2030ENHelen AbdalhassanMhmoodDepartment of Chemistry, College of Science, Mustansiriyah University, Baghdad , Iraq0000-0001-6977-1792Souad JabbarLaftaDepartment of Chemistry, College of Science, Mustansiriyah University, Baghdad , Iraq.0000-0002-7136-0666Abdul Jabar KhalfAtiaDepartment of Chemistry, College of Science, Mustansiriyah University, Baghdad , Iraq.Redha IbrahimAl-BayatiDepartment of Chemistry, College of Science, Mustansiriyah University, Baghdad , Iraq.Ahmed MutanabbiAbdulachemistry, college of science, Mustansiriyah university0000-0002-6321-0555Journal Article20190913Abstract A novel series of 1,4-benzoxazinone derivatives were synthesized and characterized using FT-IR , 1H-NMR, 13C-NMR and Mass spectroscopy. These compounds were in vitro screened against several bacterial species gram positive and gram negative as well as Candida albicans and found exhibiting moderate to potent activity. The antioxidant study was confirmed for the synthesized derivatives against 1,1‐diphenyl‐2‐picryl hydrazyl (DPPH) radical. Docking study for the potent compound 8 against glucosamine-6-phosphate synthase , the target enzyme for the antimicrobial agents was explored to explain the interactions of the discovered hits with in the amino acid residues of the enzyme active side. The docking parameters enhanced the activity of new compound as promising antimicrobial agents.https://ejchem.journals.ekb.eg/article_58188_9d756ae6fa81a44d9bccdc48e701810f.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Chemical Composition and Biological Activities of Red beetroot (Beta Vulgaris Linnaeus) Roots2392465369410.21608/ejchem.2019.17977.2092ENAmani M.D.El-MesallamyDepartment of Chemistry, Faculty of Science, Zagazig University, Zagazig, EgyptAhlam EL-SayedAbd El-LatifAnimal Health Research Institute, Zagazig, EgyptMohamed HassanAbd El-AzimDepartment of Chemistry, Faculty of Science, Zagazig University, Zagazig, EgyptMahrous G.M.MahdiDepartment of Chemistry, Faculty of Science, Zagazig University, Zagazig, EgyptSahar Awad AllahHusseinHead of department of Phytochemistry and Plant Systematics,Division of Pharmaceutical Industries,National Research Center, El Buhouth st., Dokki
Dokki, Cairo, Egypt0000-0002-6305-508XJournal Article20191009Plants have been used for many years as a source of traditional medicine to treat various diseases and conditions. Beta Vulgaris Linnaeus ranks among the 10 most powerful vegetables as excellent sources for phytochemicals, which showed potent antioxidant and anticancer activities.<br /> The aim of this study is to characterize the chemical composition and determine the cytotoxicity and antibacterial activity of B.Vulgaris roots extract. <br /> The results of GC-Ms analysis of the unsaponifiable matter of B.Vulgaris roots showed the presence of 18 components. The undecane is the major hydrocarbon compound and α-citronellol is the major oxygenated compound.<br /> The methanolic extract of B.Vulgaris roots were enriched with a complicated mixture of phenolic acids and flavoniod which elucidated for the first time from this plant , including polyphenolic acid; ellagic acid (1); pyrogallol(2); salicylic(3); catechol(4); benzoic(5); protocatchuic (6); chlorogenic(7); p-hydroxy benzoic acids (8) . The molecular components of a flavoniod fraction, obtained from liquid chromatography extract, were identified using HPLC -ESI -MS. The major components were vitexin -2" -O-rhamnoside (1); demethylated -2"-xylosylvitexin (2); isorhamnetin -3-gentiobioside (3); rutin(4); beside minor components , luteolin-6-arabinose-8-glucose(1); hesperidin (2); acacetin (3); kaempferol-3-(2 -p -comaroyl) glucose (4); apigenin 6 -arabinose -8-glactose (5); quercetin (6); naringin (7). The structures of all isolated compounds were elucidated by conventional methods, spectroscopic analysis alongside their mass spectrometric investigations.<br /> The search for new, potentially biologically active extract becomes much more efficient after identification of all compounds in that mixture.<br /> The cytotoxic activity of methanolic extract was evaluated against pancreatic carcinoma (PANC-1) , hepatocellular carcinoma cell line HEPG-2 and , Lung carcinoma (A549) using MTT assay and vinblastine as a reference drug. methanolic extract showed higher activity with (IC50=3.69 µg/ml), mild cytotoxic activity against HepG2 with (IC50=4.43 µg/ml) ,Lung carcinoma (A549) with (IC50=4.9 µg/ml) and a weak activity against prostate carcinoma PC-3 with (IC50=6.1 µg/ml). <br /> The antimicrobial activity of B.Vulgaris roots methanolic extract was evaluated using agar well diffusion method towards two representatives for each of Gram positive and Gram negative bacteria. The extract demonstrated inhibitory effect against pathogenic microorganisms: Staphylococcus aureus, ATCC 29213; (ZI=24mm) strains and Pseudomonas aerogenasa ATCC 27853); (ZI=19.3 mm) at 100 µL concentration.https://ejchem.journals.ekb.eg/article_53694_eca548d94df60d92cc33b860198f19a2.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Oxidative Stress of Some Triazolopyrimidine Derivatives and their Nucleoside Analogues on Mcf-7 and A549 Cell Lines2472535861610.21608/ejchem.2019.18248.2136ENAmgadHassanBiochemistry department- NRC- Egypt0000-0001-7962-0728Mamdouh MoawadAliBiochemistry department -National Research Center (NRC).0000-0002-4931-4153MohamedDiaabiochemistry department, National research center, Egypt.0000-0002-9312-0807Mousa OGermoushBiology Department, College of Science, Jouf University, Sakaka, 2014, Saudi Arabia.Ashraf MMohamedApplied Organic Chemistry Department, National Research Centre, Dokki, Cairo, Egypt.0000-0001-7019-5286WaelEl-SayedPhotochemistry Department, Naional Research Centre, Dokki, Cairo, EgyptJournal Article20191020The synthesis and assessment of the biological benefits and applications of new triazolopyrimidines and their glycoside derivatives were discussed and researched thoroughly. Interestingly, the data revealed activity of these newly synthesized compounds in A549 and MCF-7 cell lines, where MCF-7 cells responded more effectively to the examined compounds than the other cell lines. The present work’s aim is to appraise the behavior of some free radical enzymes, including SOD, CAT, GSH-Px and oxidative stress parameters H2O2, NO, GSH in MCF-7 and A549 treated cells. The results brought out that, there is an increase in the level of H2O2 and NO associated with an acme in the SOD enzyme activity, besides there is a diminution in the activities of CAT, GSH and GSH-Px when we compared it with control. These results may indicate that compounds 1, 2, 3 and 4 may exert their anticancer activities - to some extent – through the inflection of both the production of reactive oxygen species (ROS) and the action of antioxidant enzymeshttps://ejchem.journals.ekb.eg/article_58616_cae1659638b57c3968c370c522edc97f.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Eco-Friendly Route for Encapsulation of 5-Fluorouracil Into Polycaprolactone Nanoparticles2552676931310.21608/ejchem.2019.19380.2182ENMosheraSamypolymers and pigments, national research center,Giza,Egypt0000-0002-7272-4134Heba M.Abdallahpolymers and pigments, national research center, Giza, EgyptMagdy M.H.AyoubPolymers and Pigments,National research center,Giza,EgyptM.E.VylegzhaninaInstitute of Macromolecular Compounds, Russian Academy of Sciences, RussiaA.Ya.VolkovInstitute of Macromolecular Compounds, Russian Academy of Sciences, RussiaT.E.SukhanovaInstitute of Macromolecular Compounds and S.V. Lebedev Institute of Synthetic Rubber,RussiaJournal Article20191111The main objective of this study was to allocate and evaluate the most optimum conditions to prepare the 5-Fluorouracil (5-FU) entrapped polycaprolactone (PCL) nanoparticles (5-FU–PCNs) by eco-friendly route. The inner aqueous phase (W1) was added to solution containing PCL with homogenization to form primary emulsion (W1/O) which was emulsified with the outer aqueous phase (W2) containing polyvinyl alcohol (PVA) as stabilizer to attain the double emulsion (W1/O/W2). The different parameters were investigated to reach the most successful formulation for 5-FU–PCNs, such as polymer concentration, effect of stabilizer concentration ratio (0.5%, 1% and 3%) on drug encapsulation efficiency, etc. The encapsulation efficiency of PCNs was in the range of 14-65.6%. The prepared nanoparticles showed the spherical shape having an average size of 183-944nm.The prepared systems were elucidated by fourier transform infrared spectroscopy (FTIR), UV-spectroscopy, photon correlation spectroscopy (PCS), X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA),scanning electron (SEM) and atomic-force microscopy (AFM).<br /> The optimized ratios of the different parameters of double emulsion process were founded. SEM and AFM confirmed the complicated morphology and the formation of the spherical micro- and nanocapsules.https://ejchem.journals.ekb.eg/article_69313_567b63f48b9b7ccb0961023516636628.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Eco-Friendly Technique for Invertase Immobilization and Oligosaccharide Synthesis at Low Temperature2692806931810.21608/ejchem.2020.21441.2277ENDoaa A.R.MahmoudChemistry of Natural &amp; Microbial Products Department Pharmaceutical Division ElJournal Article20191224Eco-friendly technique for invertase immobilization has been created. It is very simple and does not need a preparation of highly pure enzyme or an expensive carrier. The technique relies on mixing pretreated sawdust with baker's yeast in a closed system and comparing it with that in an open system. The technique introduces a practical and new insight into the role of carbon dioxide in modification of sawdust's surface and invertase immobilization. It also provides vital insights on the role of immobilization technique on the stability and activity of the enzyme. The storage stability of the immobilized invertase retained 93% of its activity after storage of 2 years at 4 ºC. Although Invertase has been largely immobilized on different cellulosic materials, but the novelty of this study is the enzymatic synthesis of oligosaccharide by cold-adapted invertase at 20 ºC.https://ejchem.journals.ekb.eg/article_69318_6122a00f7e7cbd4c7df482595a305bfc.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Nanostructured TiO2 Thin Films Deposited by Spray Ultrasonic Nebulizer Technique2812886831110.21608/ejchem.2019.17350.2064ENMohammed K.KhalafMaterials Research Directorate, Ministry of Science and Technology, Baghdad, Iraq.Firdous Sh.AhmedDivision of Basic Science, College of Agriculture Engineering Science, University of Baghdad, Iraq.Ruaa M. SalehAl-alWanyDept. of Chemistry, College Of Education for Pure Science, University of Anbar, Anbar, IraqJournal Article20190925This work details the growth of nanostructured TiO2 thin films on a glass substrates using the ultrasonic nebulizer technique, deposited at 300-600 °C . The influence of the deposition temperature is linked to the physic-chemical properties of the TiO2 thin films. XRD- results confirmed that the nanostructures tetragonal are polycrystalline, the grain size(s) increases alongside the substrates temperature, and the deposited film is the anatase phase at 400 ̊C. The surface morphology of the deposited film were imaged using the (AFM) technique, and it was confirmed that the films are of excellent crystallinity and are homogeneously dispersed. It was also confirmed that the Root Mean Square (RMS) of the thin films' surface roughness is dictated by the substrate's temperature, which was further confirmed using the SEM technique. The substrate temperature is inversely proportional to the optical energy gap values. The increase in optical gap with increasing substrate temperature can be due to improvement in the films crystallinity .At higher temperatures promote a high mobility of ad-atoms; it allows a better atomic arrangement, which promotes the formation of a crystalline structure.https://ejchem.journals.ekb.eg/article_68311_8371e46a98bcda7be6d550408c466fd0.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Preparation ,Characterization and The Biological Activity Study of A new heterocyclic (Azo-Schiff base) ligand and Their Complexation with {Co,Ni,Cu,Zn(II)}Ions2893006832810.21608/ejchem.2019.19821.2195ENLayla AliMohammedDep. of Chemistry, College of Education for Girls, University of Kufa, Najaf, Iraq.Nadia IzetMahdiDep. of Chemistry, College of Education for Girls, University of Kufa, Najaf, Iraq.Radhiyah Abdul BaqiAldujailiDep. of Chemistry, College of Education for Girls, University of Kufa, Najaf, Iraq.Journal Article20191119A new tetra dentate Schiff base ligand has been synthesized from condensation of compound (1): [( 4 -((1-H-imidazol-2-yldiazenyl)-1,5-dimethyl-2-phenyl-1Hpyrazol-3(2H)-one)]with compound (2) thio semicarbazaide. The general formula of complexes are [M(L)]Cl2 Where. M= Co(II) ,Ni (II)and Cu(II)Zn(II) are reported. The geometry structures of ligand and the complexes were determined through Fourier-transform infrared spectroscopy (FT-IR), Mass spectra, X-ray diffraction analysis, Ultra violet-Visible(UV-Vis), Proton nuclear magnetic resonance(1H NMR) spectral studies, magnetic moment measurement, elemental analysis, and molar conductance. These studies revealed square planar geometries for Ni(II)and Co(II) and Cu(II)complexes, except the Zn(II) complex was a tetrahedral geometry around the central metal ion. Complex formation studies via molar ratio and continuous variation methods were consisted to those found in the solid complexes with a ratio of (M:L) as (1:1) . Stability constant of complexes were calculated by spectrophotometric methods. Hyper Chem-8 program has been used to predict geometries structures of compounds in gas phase. The heat of formation (∆Hf) and binding energy (∆E b) at 298 K for the metal complexes were calculated by PM3 method. Biological activity studies of the ligand and their metal complexes against several organisms, bacteria Gram positive G(+ve)staphylococcus aureus and bacteria Gram negative G(- ve)Escherichia coli, klebsiella pneumonic, In addition to fungi like Aspergillus Niger, Rhizoclonia bataicola and Aspergillus flavus , are reported. Compounds exhibited the high activity on the growth of all types microorganisms in this study. This may be attributed to the impact of both the chelate effect of Schiff bases ligand and the role of the metal in these complexes.https://ejchem.journals.ekb.eg/article_68328_fa29c6d510519a2ec448e78aad042410.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Synthesis and Characterization of Some Transition Metal Complexes with New Azo- Schiff Base Ligand 3,4-bis(((1E,2E)-2-((2-((4-((Z)-(3-Hydroxyphenyl)Diazenyl)Naphthalen-1-yl)amino)ethyl)imino)-1,2-Diphenylethylidene)Amino)Phenyl)(phenyl)Methanone3013136833110.21608/ejchem.2019.18924.2166ENIbtihal KadhimKareemDepartment of Chemistry ,Faculty of Education foe Girls,University of Kufa,Najaf,Iraq0000-0002-4969-0335Muna AbassHadiDepartment of Chemistry / Faculty of Education for Girls / University of Kufa, IraqJournal Article20191031A new Azo-Schiff base derivative (3,4-bis(((1E,2E)-2-((2-((4-((Z)-(3-hydroxyphenyl) diazenyl)naphthalen-1-yl)amino)ethyl)imino)-1,2-diphenylethylidene)amino)phenyl)(phenyl)methanone (HANPH) and its metal complexes which include Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Pt(II), and Au(III) metal ions were synthesized. The structure of these compounds has been investigated by using elemental analysis, FT-IR, UV-Vis spectrometric methods, 1H-NMR, mass spectra, atomic absorption, molar conductivity and magnetic susceptibility of metal complexes. The spectroscopic data of the complexes suggest that their (1:1) (metal: ligand) is mole ratio. Also, the analytical studies for all new complexes have shown octahedral geometries, except for Pt (II) and Au (III) complexes which suggested square planar geometries also its conductivity measurements show electrical properties. These complexes show high conductance value supporting (1:1) electrolytic nature. Furthermore, the FTIR results show that the coordination site from the ligand to the metal ions were through the nitrogen of azomethine group and the nitrogen of the azo group for all new complexes, except for Pt (II) and Au (III) complexes which were through the nitrogen of imine groups only.https://ejchem.journals.ekb.eg/article_68331_42fc096e785804bb7f2b91f2fd538f3c.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101DFT and NBO Studies of Stability, Electronic, and Structural Features of the 2-fluoroacetaldehyde Conformers3153246260910.21608/ejchem.2019.16737.2017ENAGhasemiDepartment of chemistry, Faculty of science, Arak Branch, Islamic Azad University, Arak, IranRezaFazaeliDepartment of Chemistry, South Tehran Branch, Islamic Azad University, Tehran, IranRezaGhiasiDepartment of Chemistry, East Tehran Branch, Islamic Azad University, Tehran, IRANJournal Article20190908In this investigation, the stability of the keto-enol forms and conformers of 2-fluoroacetaldehyde was investigated by LC-wPBE, B3LYP and M06-2X functionals and 6-311++G(d,p) basis set. The total energy, the energies of frontier orbitals, HOMO-LUMO gaps and total dipole moment of these molecules were estimated. These calculations show that more stability of the keto form in compared to enol form. Calculations at the LC-wPBE/6-311++G(d,p) level of theory reveal the more stability of I-conformer in compared to other conformers. Natural bond orbital (NBO) analysis was applied for illustrating the negative hyperconjugative effect on the conformers. In the basis of NBO analysis, the LP (O2) *(C-H) and LP (O2) *(C-C) interactions were responsible of the negative hyperconjugation in the examined compounds. The interaction energy, off-diagonal elements, and total steric energy values of these interactions were reported.https://ejchem.journals.ekb.eg/article_62609_3e0c1cbb2171e79a77eb1308d2a8546c.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101New Schiff Base Crystal Ligand type [NO 2 ] derived from the interacting of 2-aminophenol with Glyoxylic acid, and its [N 2 O 4 ] Mn п Complex, Synthesizing and Characterizing3253356260710.21608/ejchem.2019.17061.2052ENJasim SSultanDepartment of Chemistry, College of Education for pour science, Baghdad UniversityEmanAlsalihiDepartment of Chemistry, Faculty of Science and Health, Koya University0000-0001-8991-0702Aeed SAl-FahdawiDepartment of Chemistry, College of Education for Women, University of Anbar, Ramadi0000-0002-2132-865XAmer JabarJaradDepartment of Chemistry, College of Education for pour science, Baghdad University, BaghdadJournal Article20190919The Schiff base reaction played an important role of the condensation reaction between 2-aminophenol and Glyoxylic acid in the presence of calculated amounts of KOH as a catalyst. The reaction has been carried out in ethanol under reflux and stirring condition for 3.5 hrs. All syntheses were carried out under hydrogen gas forming a new potassium (E)-1-hydroxy-2-(2-hydroxyphenylimino)ethanolate ligand type [NO2]. The ligand of the general formula K2[Mn(L2)] type and its Mnп complex K2[Mn(N2O4)] type, has been characterized by spectroscopic methods (F.T-I.R. and U.V-Vis.), elemental analysis (C.H.N) metal content, magnetic susceptibility measurement, Thin-layer chromatography (T.L.C), X-RD powder diffraction, 1H-NMR, 13C-NMR molar conductance and Biological activity (The ligand and its Mnп complex were exposed to two types of bacteria (Staphylococcus aureus and Bacillus subtilis), using the agar disc diffusion method, and the ligand and its Mnп complex exhibited significant activities against these two types of bacteria). The X-RD of the Mnп ion complex revealed that the complexes are 100 % crystalline. The F.T-I.R. measurements, U.V-Vis. and mass spectrum for the ligand and its complex reveal the exact peak for each of the compounds functional groups.<br /> The study revealed the formation of a new ligand type [NO2] with study the formation of new crystal complex and six-coordinate octahedral structure around Mnп metal ion in the ratio of 1:2 (metal:ligand) stable compounds which can be used in many fields (medicine & industry ). <br /> <br /> Index Terms—Crystal ligand, 2-aminophenol and 2-oxoacetic acid (Glyoxylic acid), Manganese (II) acetate 4hydrate-99+%, Six-coordinate octahedral complex, Structural study, Schiff bases.https://ejchem.journals.ekb.eg/article_62607_5a3125622678b6948fc4d3e283a8ec2c.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Antidiabetic, Antihyperlipidemic and Antioxidant Activities of Acacia albida in Streptozotocin-induced Diabetes in Rats and its Metabolites3373486352710.21608/ejchem.2019.18863.2160ENAhmed H.GarraChemistry of Natural compounds, National Research Center, 12622 Dokki, Cairo, EgyptSayed A.EltomyNational Research center
Tanning lab.https://orcid.org/00Abdel-razik H.AarragPathology and Medical, National Research Center0000-0002-6121-450XNadia M.Ahmed4Biochemistry Departments, National Research CenterJournal Article20191030The particular purpose of this research was to assess the antidiabetic, antihyperlipidemic and antioxidant activities of Acacia albdia methanol extract. In addition, a phytochemical study for A. albdia has been performed. Isolation and identification of pure compounds were carried out by different chromatographic and spectroscopic techniques. Quercetin, kaempferol and their glycosides have been isolated from A. albida leaves. Structures of the isolated compounds have been estimated by 1D/2D 1H/13C-NMR spectroscopy. Methanolic extract of the leaves of A. albida improved the diabetes status, and it showed antidiabetic, antihyperlipidimic and antioxidant effects. These findings suggest that A. albida leaves may be used as hypolipidemic and normo-glycemic agents, additionally; A. albida is a rich source of phenolic compoundshttps://ejchem.journals.ekb.eg/article_63527_05b2e3b23bacea8eaf4dbef1a42ab62e.pdfNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563120200101Synthesis, Antibacterial Activity and DFT Calculations of Some Thiazolidine-4-Carboxylic acid Derivatives and Their Complexes with Cu(II), Fe(II) and VO(II)3493626351610.21608/ejchem.2019.16096.1986ENFirasNawarEducation Directorate of Thi-Qar, Ministry of Education, Thi-Qar, Iraq.RafidAl-AsadiDepartment of Chemistry, College of Education for Pure Sciences, University of Basrah, Iraq.0000-0001-8995-6006DawoodAbidDepartment of Chemistry, College of Education for Pure Sciences, University of Basrah, Iraq.Journal Article20190823The reaction of L-Cysteine with 2-hydroxy naphthaldehyde and 2-hydroxy benzaldehyde yields novel bidentate ligands (2R,4R)-2-(2-hydroxynaphthalen-1-yl)thiazolidine-4-carboxylic acid (L2) and (2R,4R)-2-(2-hydroxyphenyl)thiazolidine-4-carboxylic acid (L1), respectively, which can be characterised based on spectral and physical data. Synthesis of complexes with the formula ML2.XH2O is done via the reaction of L1 and L2 with Cu(II), Fe(II) and VO(II) in molar ratio of 1:2 pertaining to metal to ligand. Based on mass and UV/visible spectra, IR, flam atomic absorption, magnetic susceptibility as well as thermal analysis of metal complexes, we can conclude that the ligands behave as a bidentate and help to identify proper structure pertaining to complexes. Then, screening of the synthesised compounds is carried out to determine their antibacterial activity against Pseudomonas aeruginosa and Streptococcus epidermis. All compounds showed bio-activeness with iron complexes possessing the highest efficiency. The density functional theory at the B3LYP level of theory was employed to calculate the geometry optimisation pertaining to molecular structure as well as energies of ligands and its associated complexes. The observations of the theoretic calculations were in line with the outcomes of the experiment.https://ejchem.journals.ekb.eg/article_63516_a0603ed26370fcc1e8002dbf0179a3cd.pdf