National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Synthesis of Triazole Derivatives Via Multi Components Reaction and Studying of (Organic Characterization, Chromatographic Behavior ,Chem-Physical properties)416341747728510.21608/ejchem.2020.23541.2399ENRajaa AbdulameerGhafilDepartment of Chemistry, College of Education for Girls, Kufa UniversityNour AbdAlrazzakDepartment of Chemistry, College of Science for Women, University of Babylon, Iraq.Nagham MahmoodAljamaliDepartment of Chemistry ,Organic Synthetic Field, Iraq.Journal Article20200205In this paper, the novel component were synthesized in good yield via multi reactions like (Aldole reaction , azotation–coupling reaction, condensation reaction , substitution reaction ,cyclization reaction) by using types of conditions and multi components reactions to formation imidazole ,Thiazole ,oxazole ) derivatives with bis- triazole cycles ,imidazole and thiazole The formatted triazole compounds have been characterized through spectral and chemical techniques like (1H NMR, IR ,some of them C.NMR ) ,studying of Chromatography studying and physical properties for all Compounds.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101DESIGN, SYNTHESIS AND BIOLOGICAL EVALUATION OF NOVEL INDOLE-THALIDOMIDE HYBRIDS ANALOGS417541847728610.21608/ejchem.2020.23685.2408ENMagdyZahranFaculty of Science, Department of Chemistry, Menoufia University, Shebin El-Koom, Egypt0000-0003-4091-4766SalahEL KoseyFaculty of Science, Department of Chemistry, Menoufia University, Shebin El-Koom, EgyptAhmedMehanyFaculty of Science, Department of Zoology, Al-Azhar University, Cairo, EgyptMohamedGebreilFaculty of Science, Department of Chemistry, Menoufia University, Shebin El-Koom, EgyptJournal Article20200208Abstract<br /> A series of novel Indole-Thalidomide hybrids were designed and synthesized in a good yield to improve and develop higher potency and selective anti-tumor agents. By two steps alkylation of Indole with Thalidomide then react the product with different active methylene groups.Their antiprolifer-ative evaluation activities against HCT 116 (colon cancer cell line), HepG2 (liver cancer cell line) and MCF-7 (breast cancer cell line). In vitro were tested by using Sulforhodamine-B stain (SRB) assay. The chemical structures of all synthesized analogs were elucidated on the basis of their spectral IR, 1H NMR, 13C NMR, Mass spectroscopy and element analysis. The result of the present work indicated all new analogs showed good activity toward all the tested cell lines, analog 8 has broad-spectrum anticancer activity toward all the tested cancer cell lines, followed by analog 2. The apop-tosis evaluation for new analogs on Caspase-3, Bcl2 and Bax shown the best activity for analogs 2 and 8, so that the two analogs were histopathologi-cally investigated.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Evaluation of Rare Earth Elements in Black Sand and Phosphate ores, EGYPT418541937893710.21608/ejchem.2020.21042.2305ENMahmoud Sayed AhmedShahinChemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt0000-0001-7226-0731Ebtissam ASaadchemistry, Faculty of science , Ain Shams UniversityAhmedShazlyCentral laboratories, Almaza, Cairo, EgyptAmirEzzatChemistry Department, Faculty of Science, Ain Shams University, Cairo, EgyptSayed AElmongyNuclear and Radiological Regularity Authority (ENRRA), Cairo, EgyptJournal Article20200103The rare earth elements (REEs), uranium (U) and thorium (Th) isotopes found naturally in soil, rock, water and plant. About 20 samples of Black sand and phosphate were collected from different locations in the Rashid city , Egypt. All the collected samples were prepared and chemically treated using different acids and microwave, then analyzed using ICP-MS. The present work was conducted to identify and evaluate the compositional trends of REEs, U and Th in the samples in terms of distribution patterns and indicator ratios. The results revealed that the black sand and phosphate ores are rich as natural sources of U, Th and other rare earth elements. The elements’ concentrations in black sands and phosphate ores were found higher than the world average crust soil.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Synthesis and Characterization of Monomer and Three Types of Polymers Containing Chalcone Groups in Main Chain419542037893810.21608/ejchem.2020.21287.2276ENHuda SabahHassenDepartment of chemistry, Girls College of Education, University of Kufa, Iraq.Nadia SadiqMajeedDepartment of chemistry, Girls College of Education, University of Kufa, Iraq.Hanan FalehMohseinDepartment of chemistry, Girls College of Education, University of Kufa, Iraq.Ekhlas SabahHassanUniversity of Kufa, Faculty of medicine, department of pharmacology and therapeutics0000-0002-0966-1345Journal Article20191224This work was aimed to prepare new monomer [ E)-1-(4-aminophenyl)-3-(4-hydroxyphenyl) prop-2-en-1-one] and three types of poly (ester-amide) polymers. New monomer is Chalcone compound α,β- unsaturated ketone contain functional group(-CO-CH=CH-) of presence system α,β- unsaturated carbonyl group. It is prepared by condensation aryl ketone with aromatic aldehyde with presence of suitable condensation agents which called Aldol condensation. Monomer reacted with (phthalic anhydride ,maleic anhydride ,salicylic acid and succinic anhydride) Via solution poly condensation reactions to yield three types of polymers. The prepared monmer and polymers were characterized by [(FT.IR-spectra, Nuclear magnetic resonance 1H.NMR-spectra , 13C.NMR-spectra and Differential scanning calorimetry (DSC)] All the polymers showed good thermal stability and good data of glass transition temperature (Tg). The results revealed that poly (ester-amide)s were successfully prepared by giving good spectrum which improved the existed amide functional group (-CONH-) and ester functional group (-COO-) in spectrum of each prepared polymer, furthermore the existed chalcone functional group(-CO-CH=CH-) is improved in spectrums of monomer.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101The synthesis and characterization of gold nanoparticles with polyunsaturated oils contribute to hypolipidemic and anti-obesity activities in vivo.420542167893910.21608/ejchem.2020.21510.2280ENAmira FawzySolimanDepartment of nutritional chemistry and metabolism, National Nutrition Institute (NNI) - Healthy Minster, Cairo, Egypt0003-2361-4235Mohamed AAbdel-RahmanAssistant Professor of Molecular Toxicology &amp; Physiology of zoology, Zoology Department, Faculty of Science, Suez Canal University, Ismailia, Egypt.0002-4876-8997HanaaHamadNational institute for nutrition0003-0443-0940Elsayed HEltamanyProfessor of Organic chemistry, Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt.0002-1657-5234Al-SayedAl-SherbiniProf. of Photochemistry and Nano chemistry, Department of Measurements, Photochemistry and Agriculture Applications, National Institute of Laser Enhanced Science (NILES), Cairo University, Giza, Egypt.0002-9477-3113Journal Article20191226This study aimed to evaluate the hypolipidemic, and anti-obesity effects of polyunsaturated oils, mixed with gold nanoparticles (AuNPs). AuNPs were prepared by the oleic acid pyrolysis method. The sample was characterized by UV spectroscopy and transmission electron microscope (TEM). Sixty adult male rats were divided into 2 main groups. Group one (n=10 rats) was fed on the healthy diet (serves as basic control). The other group was fed on the high fructose diet (HFD) for four weeks and then was divided into five subgroups. 1st subgroup was fed on HFD only, 2nd and 4th subgroups were treated with n-3 PUFAs oils while 3rd and 5th treated with n-3 PUFAs oils mixed with AuNPs. Treatment of obese rats with n-3 PUFAs mixing with AuNPs revealed a significant decrease in in weight gain accompanied by an improvement of lipid profile. Histological examination of the heart indicated a marked improvement in the architecture and marked decrease of relative weight of heart in treated rats. It may be concluded that mixing of PUFAs oils with AuNPs could have the ability to lower weight gain of obese rats and relieved the various biochemical and histological abnormalities resulted due to obesity metabolic disorders.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Novel anthracene-9-sulfonyl derivatives as anticancer agents: synthesis and in vitro biological evaluation421742257894210.21608/ejchem.2020.24843.2473ENWalaaSalah Goda ElserwyPharmaceutical Industries Research division
Therapeutical Chemistry Department
National Research Centre0000-0002-0400-4637NeamaMohammed2Department of Therapeutic Chemistry, Pharmaceutical and Drug Industries Research Division, National Research Centre, Dokki, Cairo, Egypt, 12622.0000-0003-1221-9926EmadKassemDepartment of Therapeutic Chemistry, National Research Centre, Dokki 12622, Giza, Egypt,MarwaMounierPharmaceutical and Drug Industries Research Division, Department of Pharmacognosy, National Research Centre, Giza, EgyptWeamSalah Goda ElserwyDepartment Of Microbial and Natural Products chemistry
National Research Centre0000-0003-1757-1742Journal Article20200228In this study, a new series of anthracene-9-sulfonyl derivatives incorporated with different heterocyclic moieties were synthesized and screened for their in vitro anticancer activity against colon carcinoma cell lines (HCT-116), hepatic carcinoma cell lines (HepG 2) and breast carcinoma cell lines (MCF-7). Among them, compound 4-acetylphenyl anthracene-9-sulfonate (8) showed selective high cytotoxic activity over colon carcinoma cell lines (HCT-116), also compounds 2-(anthracen-9-ylsulfonyl)malononitrile (7), N-(4-fluorophenyl)anthracene-9-sulfonamide (5b) and N-((1H-benzo[d]imidazol-2-yl)methyl)anthracene-9-sulfonamide (10) showed the significant selective cytotoxic effect over breast carcinoma cell lines (MCF-7). All the compounds are subjected to explore their safety on normal human skin cell lines (BJ-1), the results revealed that all the compounds are safe and have insignificant weak cytotoxicity over normal human cells.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101A fluorescent molecule based on 1,8- naphthalic anhydride: synthesis, spectral properties, and studying the conductance in solution422742337894410.21608/ejchem.2020.18464.2138ENROZA AbdulrazaqAL-AQARChemistry, Science, Basrah University, Basrah, Iraq0000-0001-9960-1313Journal Article20191020Abstract<br /> In this paper, the compound of (4-bromo-3-nitro-1,8 -naphthalic anhydride) and the dopant material (4-hydroxy-m-benzene-disulfonic acid) were synthesized. The UV- Vis absorption and emission spectra of the compound were recorded. 4-bromo-1,8- naphthalic anhydride was used as a starting material to prepare the compound (4-bromo-3-nitro-1,8 -naphthalic anhydride) in the presence of concentrated sulphuric acid and sodium nitrate. The dopant material (4-hydroxy-m-benzene-disulfonic acid) was prepared by using phenol in concentrated sulfuric acid. The absorption bands depend on the solvent polarity, which the compound shows significant red shift in DMSO solvent compared to in ethanol solvent.<br /> The fluorescence spectra of this compound were sensitive to the solvent polarity, the calculated result indicates that the maximum peak is shifted to red in polar solvent, to the excited states of the polar ICT, which leads to decrease the energy of the excited states. The effect of the dopant material on the conductivities (ionic and specific) of the compound was studied, the ionic conductance was increased as the weight of the dopant material increases.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Analysis of electronic, Raman and UV-vis spectra for Zn11Se11, Zn11S11, and ternary alloys Zn11SnSe11-n(n= 1-11) A DFT/TDDFT study.423542417894610.21608/ejchem.2019.15197.1923ENHusseinAbedUniversity of BabylonHayder MohammedAbduljalilDepartment of Physics, College of Science, University of Babylon, Iraq.Muder AhmedAbdulsattarMinistry of Science and Technology, Baghdad, Iraq.0000-0001-8234-6686Journal Article20190724Zn11Se11, Zn11S11, and ternary alloys from Zn11SnSe11-n (n = 1 - 11), with cubic structures represented by nanostructures called tetramantane, have been studied theoretically by investigating the electronic properties, Raman and UV-vis spectra. LUMO and HOMO levels were observed to change with the number of the sulfur atoms. The (HOMO - LUMO) gap for Zn11Se11 (2.377205eV) increased with the sulfur atoms. Zn11S8Se3 was calculated to have an energy gap (3.061305eV) less than others ternary alloys. The calculated energy gap of Zn11S11 (3.597374eV) is in a high agreement with experimental value (3.6 eV). Raman spectra for ternary alloys Zn11SnSe11-n content peaks result from the connection of (Zn11Se11+Zn11S11) peaks, Zn11Se11 has peak at 260.42 cm-1 shifts from the experimental value by a small deviasion which is produced due to the confinement effect. UV-vis spectra for ternary alloys shifted to a higher energy level with the increase in the number of sulfur atoms and dramatically close to Zn11S11 UV-vis spectrum except Zn11S8Se3 has λmax at 342 nm. These nanostructures are suitable to be used in different applications such as lenses, photoelectronic devices, solar energy, and biosensors. DFT/TDDFT at the B3LYP level with SDD basis functions is used. All the calculations are completed using the Gaussian 09 program.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101pH-Metric studies of (2-pyrrole)-(5,6-diphenyl-[1,2,4]-triazin-3-yl)hydrazone with inner transition metals424342527894710.21608/ejchem.2020.12631.1783ENFatmaSamyDepartment of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11341, Egypt0000-0001-8677-8777AliTahaDepartment of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11341, EgyptHussein SakerSeleemDepartment of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11341, Egypt.Atef A.T.RamadanDepartment of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11341, Egypt.Journal Article20190509The reaction of (2-pyrrole)-(5,6-diphenyl-[1,2,4]-triazin-3-yl)hydrazone with trivalent 4f lanthanide metal ions (LaIII, PrIII, NdIII, SmIII, EuIII, GdIII, TbIII, DyIII, HoIII, ErIII and YbIII) and 5f actinide metal ion UO2II has been studied potentiometrically in 75% (v/v) dioxane-water; at 283, 293, 303 and 313K. The ligand behaves as mono-protic species with the dissociation of hydrazo group proton and reacts with metal ion in molar ratio 1:2; M:L in solution. The formation constants were caulculated, which decrease as temprerature increases. The negative values of ΔH° and ΔG° indicate that the complexation are exothermic and proceeds spontaneously, respectivily. The electrostatic forces are weaker than non-electrostatic forces, where -DG°non is lower than -DG°el.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Comparative study of adsorption of fluoride ions on chitosan gel beads and cross-linked chitosan gel beads425342597982410.21608/ejchem.2019.12621.1795ENOTMANGOUDALILaboratory of Chemistry of Coordination and Analytics, Faculty of Science, B.P. 24000, El Jadida, MoroccoRACHIDEL KAIMBILLAHLaboratory of Chemistry of Coordination and Analytics, Faculty of Science, B.P. 24000, El Jadida, Morocco.MAHFOUDAGUNAOULaboratory of Chemistry of Coordination and Analytics, Faculty of Science, B.P. 24000, El Jadida, Morocco.MOHAMMEDEL AZHARLaboratory of chemistry of coordination and Analytics, Faculty of Science, BP. 24000 El Jadida, MoroccoABDESSADIKSOUFIANELaboratory of Chemistry of Coordination and Analytics, Faculty of Science, B.P. 24000, El Jadida, Morocco.Journal Article20190513Abstract<br /> The presence of fluoride in water has become a major concern worldwide because of its chronic cancerogenic behavior in humans. In order to remove fluoride from the aqueous solution, we synthesized chitosan gel beads (CB) and cross-linked chitosan gel beads (CCB) in a batch reactor. Thus, a series of experiments were carried out to study the influence on the adsorption capacity of certain parameters such as initial fluoride concentration, adsorbent mass, pH solution and contact time. The results obtained show that the percent removal of fluoride reached a maximum of 62% after 25 min for chitosan gel beads and 72% after 30 min for cross-linked chitosan gel beads. Adsorption kinetics of the fluoride ions on the two adsorbents is well described by the pseudo-first-order model and that the adsorption isotherms are followed by the Langmuir model.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Isolation of Different Clostridium Isolates for Acetone-Butanol-Ethanol (ABE) Production from Sargassum sp.426142727982610.21608/ejchem.2020.24250.2448ENHeba I.MansourProcess design and Development Department, Egyptian Petroleum Research Institute (EPRI), EgyptHekmat R.MadianProcess design and Development Department, Egyptian Petroleum Research Institute (EPRI), EgyptLaila A.FarahatProcess design and Development Department, Egyptian Petroleum Research Institute (EPRI), EgyptEssam A.HoballahEnvironmental Microbiology Department, National Research Center, EgyptMohamed K.IbrahimMicrobiology Department, Faculty of Science, Ain Shams University, EgyptJournal Article20200220Macroalgae with several species are an abundant, carbon-neutral renewable resource and rich in carbohydrates which make it suitable for biobutanol production. Recently, due to advantages of biobutanol as a liquid biofuel, it can be used as a substitute for gasoline and diesel. Many researches mentioned that, different Clostridium species are able to use fermentable sugars for production of biobutanol from different biomasses through ABE (Acetone- Butanol- Ethanol) fermentation process. In this study the (Sargassum sp.) was used as carbon source for biobutanol production. Thirty-three anaerobic mesophilic isolates were isolated on RCM medium from five soil cultivated with different crops. Only thirteen spore forming, mesophilic, anaerobic Clostridium isolates used for the fermentation process. 100 g/L from Sargassum sp were hydrolyzed by sulfuric acid (6 % (v/v)) followed by thermal pretreatment at 121°C for 20 minutes to produce total reducing sugars (24.151 ± 0.273 g/L), which were fermented by Clostridium isolates. The most promising isolate (HG1) which produce the highest butanol level, acetone and ethanol (3.743, 1.401 and 1.031 g/l) respectively was identified according to Butanol dehydrogenases (bdhA) gene analysis as Clostridium acetobutylicum. This paper emphasizes the importance of (Sargassum sp.) as a renewable feedstock for the biobutanol production.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Preparation and evaluation of nonionic polyurethane polymers in improving the rheological properties and filtrate loss control of water base muds427342837982710.21608/ejchem.2020.25588.2499ENEl-SayedAnterChemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.Galal H.SayedChemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.Mahmoud I.AbdouEgyptian Petroleum Research Institute, Nasr city, Cairo, Egypt.Nasser R.Abdel-RahmanEgyptian Petroleum Research Institute, Nasr city, Cairo, Egypt.Hany E.AhmedEgyptian Petroleum Research Institute, Nasr city, Cairo, Egypt.Nabel A.NegmEgyptian Petroleum Research Institute, Nasr city, Cairo, Egypt.Egypt Nanotechnology Center, Cairo University, El Sheikh Zayed, Egypt.0000-0002-7999-0179Journal Article20200310Polyurethanes are special nonionic polymers which had a wide range of applications nowadays. This work aims to produce <br /> different nonionic polyurethanes by the reaction of polyethylene glycols with different molecular weights (4000, 6000, <br /> 10.000, and 20.000 g/mole) and toluene diisocyanate. The obtained polyurethanes' structures were determined using <br /> molecular weight measurements, Fourier transform infrared spectroscopy (FTIR), and proton nuclear magnetic resonance (1HNMR). The effect of the synthesized polyurethanes on the rheological properties of two drilling fluids was studied. The <br /> polyurethane polymers were influenced by the filtrate loss of the drilling fluids in comparison to the blank. The results <br /> showed that the synthesized polyurethane nonionic derivatives effectively enhanced the shear-thinning non-newtonian drilling <br /> fluids following the modified power Law Model (Herschel Bulky Model). The other rheological properties of the formulated <br /> drilling water-base muds, including apparent viscosity (AV), plastic viscosity (PV), yield point (YP), and gel strength were <br /> improved considerably compared to the commercial formulation.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Solidification of Alum Industry Waste for Producing Geopolymer Mortar428542947982810.21608/ejchem.2020.25720.2504ENMohamed DohimAbdelmawlaEnvironmental Science Dept., Faculty of Science, Port Said University, Port Said Gov., Egypt0000-0002-3986-6915AhmedAbdelaalEnvironmental Science Department, Faculty of Science, Port Said University, Port said Gov., Egypt.Mokhtar SamyBehearyEnvironmental Sciences Dep., Faculty of Science, Port Said University, Port Said Gov., EgyptNabil AhmedAbdullahResearch, Development and Scientific Services Dept., Egyptian Co. for Aluminum Sulfate, Kaliobeya Gov., Egypt0000 0002 6969 5942TahaA. RazekBasic Sciences Dept, Institute of Environmental Studies and Research, Ain Shams University, Cairo, EgyptJournal Article20200311This paper presents an experimental work, which carried out to test the feasibility of using dealuminated metakaolin (DaMK) as an additive to metakaolin (MK) in the production of geopolymer concrete. DaMK is produced as a byproduct from the aluminum sulfate industry. The chemical composition and physical properties of DaMK were investigated in this study. Results showed that DaMK is a good pozzolan material, which added to MK by 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, and 70% in producing geopolymer concrete. The compressive strength was measured by testing standard cubes at 7 and 28 days. Satisfactory results are achieved by using 20, 25, 30, 35, and 40% of DaMK. It is recommended to use MK with added proportions of DaMK up to 40% of MK to produce an ecofriendly and economic geopolymer concrete.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Indoline-based heterocyclic scaffold: Synthetic methods, chemical reactions and biological prospect429543258025210.21608/ejchem.2020.17899.2090ENNabaweya AbdelsalamSharafeldinDepartment of Pharmaceutical Chemistry, Tanta University, Tanta EgyptJournal Article20191007Inolines have be significant compounds because of their diversity of applications in synthetic organic chemistry, pharmaceutical, industrial chemistry as well as they are present in several biologically active compounds in both natural and synthetic origins. In recent years there are high expectations that they exhibit interesting applications in selective potentiate the activity of β-lactam antibiotics in MRSA as well as other pharmacological arena, such as anticancer, anti-inflammatory, antioxidant, anticoagulant agents, etc. Furthermore, they are considered as substantial compounds due to their widespread use as building blocks and as chiral support in asymmetric synthesis. As a result, the existing events of the indoline-based nucleus in medicinal chemistry studies require to be collected and recognized especially many reports have been suggested that the indoline-based compounds have a very high therapeutic value (in MRSA) and needs to be explored for further studies. So, this review deals with the main innovations regarding indoline-based heterocycle scaffold stressing on their synthesis, reactions and their pharmacological activities.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Novel p-nitrophenyl Maleanilic Acid and Its Organometallic Chelates of Cr, Mo and W Carbonyls Structure Evaluation Using Different Techniques and Chromium Chelate Cytotoxicity432743408033310.21608/ejchem.2020.24342.2446ENMohamed A.ZayedDepartment of chemistry, Faculty of Science, Cairo University (D.Sc. Anal.Chem.)0000-0003-2425-6329Khloud.R.OrabyChemistry Department, Science Faculty, Aswan University, 81528 EgyptFatma.S.M.HassanChemistry Department, Science Faculty, Aswan University, 81528 EgyptJournal Article20200219Novel p-nitrophenyl maleanilic acid bidentate free ligand (PNMA) was synthesized eco-friendly by solvent free reaction between 4-nitroaniline and maleic anhydride. Some novel mixed ligand organometallic chelates of formulae [M(CO)4L] (M = Cr , Mo , or W and L = PNMA) were carefully prepared under nitrogen inert gas atmosphere by condensation between ligand PNMA and hexacarbonyl of metal cations Cr , Mo , or W in 1:1 molar ratio. The chemical structures of PNMA free ligand and its novel chelates had been evaluated by elemental analyses, FTIR spectroscopy, 1H-NMR, mass spectroscopy, and thermal analyses (TGA and DTG). The chemical structures of both PNMA free ligand and its chelates were investigated also by XRD technique. The free ligand and its chromium chelate had been evaluated for their anticancer activities against MCF‐7 cells (breast cancer cell line), HCT116 cells (colon cancer cell line) and HepG2 cells (human liver cancer cell line).National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Effect of (+) and (-) hydroxycitric acid sterio-isomers present in natural products in counteracting insulin resistance434143548099810.21608/ejchem.2020.25054.2493ENHadirFaroukPharmacology department National Research CentreMuhammed A.SaadDepartment of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University.
School of Pharmacy, New Giza UniversitySawsan S.MahmoudPharmacology Department, Medical Research Division, National Research Centre, Dokki, Giza, Egypt,0000-0003-2172-0763Mohammed F.El-YamanyDepartment of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University.Ola A.SharafDepartment of Pharmacology, National Research CentreRania F.AhmedResearcher-Pharmacology Department National Research CentreEzz E.El-DensharyDepartment of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University.Journal Article20200307Metabolic syndrome is a cluster of cardiovascular and metabolic risk factors that include impaired glucose metabolism and obesity. The use of nutraceuticals is an ideal choice for controlling this disorder. The aim of the present study is to investigate the effect (-) hydroxycitric acid present in garcinia fruit rind and (+) hydroxycitric acid present in hibiscus calyx on metabolic syndrome and compare it to that of metformin. Metabolic syndrome was induced in rats by ingestion of high fat high fructose (HFHF) diet for 90 days. Metformin (500 mg/Kg animal b.wt.), garcinia (1000 mg/Kg animal b.wt.) and hibiscus (250 mg/Kg animal b.wt) were orally administered throughout the last 30 days of the HFHF diet regimen. Both garcinia and hibiscus were effective in reducing serum blood glucose and insulin levels. The effect of garcinia on blood glucose was comparable to that of metformin, while the effect of hibiscus on insulin and HOMA-IR was comparable to that of metformin. Both were able to reduce serum leptin level. All treated groups showed a significant decrease in total cholesterol level. Only hibiscus was able to normalize liver function while garcinia failed to reduce the elevated liver function. As a conclusion we would recommend the use of hibiscus over garcinia to overcome the adverse effects of metabolic syndrome.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Synthesis, Antimicrobial and Molecular Modeling Studies of Some Benzophenone-based Thiazole and 4-Thiazolidinone Derivatives435543678100010.21608/ejchem.2020.25721.2503ENAsmaaAboulMagdDepartment of pharmaceutical chemistry, faculty of pharmacy, Nahda University0000-0003-4243-9401NahedEidPharmaceutical Chemistry, Faculty of Pharmacy, Cairo UniversityAhmedKhoranyMicrobiology and Immunology Department, Faculty of Pharmacy, Nahda UniversityOsamaElgendyMicrobiology and Immunology department, Faculty of Pharmacy, Beni Suef UniversityHamdyAbdelrahmanDepartment of Pharmaceutical Chemistry, Faculty of Pharmacy, Nahda University, Beni-suef, EgyptJournal Article20200311New series of thiazolyl hydrazones were designed and synthesized via the reaction of benzophenone thiosemicarbazone 2 with chloroacetic acid, (un)substituted phenacylbromide and ethyl-2-chloroacetoacetate to yield compounds 3, 5a-d & 6 respectively. Furthermore, reaction of the thiazolidin-4-one 3 with aromatic aldehydes afforded compounds 4a-g. Characterization data, along with in vitro antimicrobial activity for all compounds are herein reported. All the synthesized compounds were screened against Methicillin- Resistant Staphylococcus aureus (MRSA), E. coli, K. pneumonia, P. aeruginosa, A baumannii, C. albicans and C. neoformans var.grubii. Compounds 2 and 4e showed the highest bacterial growth inhibition with 28.6% and 28.7% against MRSA, respectively. Moreover, the trisubstituted thiazole derivative 6 was the most active compound against Gram-negative bacteria A. baumannii with 59% growth inhibition. Furthermore, compounds 4e & 6 showed 22.5% and 17.3% decrease in peptidoglycan density, respectively. Molecular docking into bacterial MurB enzyme active site was used to determine their binding modein which they showed good interactions with Gln229, Arg225 and Ser82 amino acid residues.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Effect of Some Construction Factors of Bi-layer Knitted Fabrics Produced for Sports Wear on Resisting Ultraviolet Radiation436943788100110.21608/ejchem.2020.25922.2514ENMohamed SKamalFaculty of Applied Arts, Helwan University, Cairo, EgyptEmanMahmoudFaculty of Applied Arts, Helwan University, Cairo, EgyptAhmedHassaboNational Research Centre (NRC), Textile Industries Research Division (TRID), Pre-treatment and Finishing of Cellulose based Textiles Department (PFCTD), El-Behouth St. (former El-Tahrir str.), Dokki, P.O. 12622, Giza, Egypt0000-0001-5337-8929Mostafa MahmoudEidFaculty of Applied Arts, Helwan UniversityJournal Article20200315Ultraviolet rays represent a very low fraction of the solar spectrum which damages all living organisms and their metabolisms. Such radiations can cause a variety of symptoms, from basic tanning to extremely malignant skin cancers, fabrics with correct design specification, absorbers, and finishing methods, can play a very important role as a shielding system against the deterious effects of Ultraviolet rays.<br /> This study will stress on bi-layer knitted fabrics because knitted goods of all kinds are widely popular due to their flexibility ability to adjust, stretch when worn to a specific shape and their general comfortable wear. Knitted fabrics are widely used in Sportswear, summer clothes, under wears and Childs' clothes due to their excellent stretch and recovery, porosity, air permeability. Also knitted fabrics especially weft knitted fabrics are easier to be produced, and less cost compared to woven fabrics. Because of this fact, most previous research concerns woven structures that are typically less porous and offer higher protection against UV. The possibility of obtaining knitted fabrics with sufficient UV protection factor is of great interest, however, as knitted fabrics are more suitable for both sports and casual summer fashion garments. Current literature on the UV protection factor of knitted fabrics is very small and mostly concerns fabrics developed in machines with relatively large gauges This study is trying to find a solution for this problem by studying the Influence of weft knitted fabrics Construction with its' different parameters for Protection against Ultraviolet Radiation in sportswear applications.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Synthesis and kinetic study for the interconversion process of some 2'–hydroxychalcones to their corresponding flavanones437943868134610.21608/ejchem.2020.22974.2363ENZainab WMajedDepartment of New and Renewable Energies ,College of Scienc0000-0002-8789-0821Said AbdelqaderSaidDepartment of Chemistry ,University of Mosul, College of Science,Mosul-Iraq0000-0001-8790-3728Omar AdilShareefDepartment of Chemistry, University of Mosul, College of Science, Mosul-Iraq0000-0002-3002-6290Journal Article20200125In this work, five substituted 2'-Hydroxychalcones were prepared using Claisen - Schmidt condensation which were used then as a synthone for substituted flavanones via base catalyzed isomerization. The latter process has been studied kinetically in order to determine the rate constant. These experiments were performed using HPLC technique in (8:2) (CH3CN:CH3OH) medium at different temperatures (298 K - 318 K). The obtained results were interpreted by a four-step mechanism which considered the existence of phenoxide ion as the key intermediate.<br /> The main reaction was achieved as a pseudo first order reaction in which the rate of the studied compounds followed the sequence 1>2>3>4>5, and the activation energy had the same sequence for these compounds. The reaction rate was affected by the electronic behavior of the different substituents at ring B since they played an important role in the stability of the intermediate that led to the final product.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101A Review on Synthesis, Therapeutic, and Computational Studies of Substituted 1, 3, 4 Thiadiazole Derivatives438744088206510.21608/ejchem.2020.25343.2492ENAhmed HussienShamroukhPhotochemistry Dept., National Research Centre, Giza, Egypt0000-0001-5302-1815Mohamed IbrahimHegabProfessor In Goff University,Faculty of science, Chemistry department, Al-Goff,Saudi Arabia0000-0001-9380-171XJournal Article20200307Several studies has been reported on1,3,4- thiadiazole and their derivatives because of their wide range of therapeutic activities. Many drugs containing thiadiazole derivatives are available in market such as acetazolamide, methazolamide, sulphamethazole, cefazoline. This review article highlights the recently synthesized 1,3,4-thiadiazole possessing important therapeutic activities and Computational Studies.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Synthesis of novel 2, 3'-bipyrrole derivatives from chalcone and amino acids as antitumor agents.440944218246310.21608/ejchem.2020.27117.2560ENAtefKalmouchPeptide Chemistry Department, Chemical Industries Research Division, National Research Centre, 12622-
Dokki, Cairo, Egypt.0000-0002-0680-5507MohamedRdwanDepartment of Applied Organic Chemistry, National Research Center, Dokki 12622, Egypt.
Department of Chemistry, College of Science, Qassim University, Buraydah, Kingdom of Saudi Arabia.0000-0002-2151-6802MervatM. OmranPharmacology Unit, Cancer Biology Department, National Cancer Institute, Cairo University.0000-0003-1643-0104MarwaSharakyPharmacology Unit, Cancer Biology Department, National Cancer Institute, Cairo University.GaberO. MoustafaPeptide Chemistry Department, Chemical Industries Research Division, National Research Centre, 12622-Dokki, Cairo, Egypt.
Nahda University, New Benisuef City, Postal code (62521), Beni sueif, Egypt.Journal Article20200402A series of a novel 2, 3'-bipyrrole derivatives was synthesized via the reaction of chalcone, 1-(furan-2-yl)-3-(1H-pyrrol-2-yl) prop-2-enone, with different amino acids in an alkaline medium. The reaction proceeds throughout the condensation of the amino acids with chalcone to give imine intermediate consequent by decarboxylation, and then intramolecular cyclization to yield 2, 3'-bipyrrole derivatives. Antitumor activity of the newly synthesized bipyrrole derivatives was evaluated against different six cancer cell lines, and compounds 3d, 3e, 3c and 3h showed the strongest anticancer activity amongst the studied compounds. Compound 3h showed the broadest spectrum of anticancer activity against all cell lines tested. The results of this work offer a basis for further study of selected 2, 3'-bipyrrole derivatives as antitumor agents.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Antimicrobial and antioxidant characteristics of exopolysaccharides produced by Agrobacterium tumefaciens Cs5 and T1442344388413610.21608/ejchem.2020.26635.2542ENMohamed A.MoselhyMicrobiology Department, Faculty of Agriculture, Cairo University, 12613 Giza, EgyptFatma ShamsLotfyMicrobiology Department, Faculty of Agriculture, Cairo University, 12613 Giza, EgyptHussein E.MakboulMicrobiology Department, Faculty of Agriculture, Cairo University, 12613 Giza, EgyptAbdallah S.AliMicrobiology Department, Faculty of Agriculture, Cairo University, 12613 Giza, EgyptJournal Article20200326This work was conducted to isolate and screen for bacteria that producing higher quantities of exopolysaccharides (EPSs) from the Egyptian soils. Forty soil samples were collected from different regions of three Governorates (Beheira, Giza, and Qalyubia). A total of 165 bacterial isolates were obtained from the soil rhizosphere. Thirty-five of them (21.2%) had ability to produce stable ropy colonies. After screening, two isolates Cs5 and T1 were selected for further study according to their capacity to produce a high quantity of EPS (7.1 and 5.7 g/l, respectively). The selected bacterial isolates were identified as non-similar strains of Agrobacterium tumefaciens based on their morphological, biochemical characteristics as well as 16S rRNA gene sequencing. To obtain maximum EPS production of both strains, nutritional and cultivation parameters were optimized using the one-factor-at-a-time method. Thus, the maximum EPS yield of 21.63 and 19.57 g/l were achieved from the strains Cs5 and T1, respectively. When molasses and corn steep liquor were substituted the synthetic carbon and nitrogen sources as low cost-substrates, EPS yields were improved to be 28.73 and 24.5 g/l for Cs5 and T1, respectively. The infrared (FT-IR) spectra for both extracts revealed the typical patterns of polysaccharide absorption. Moreover, HPLC analysis demonstrated that EPSs were heteropolysaccharide composed of glucosamine, glucose, and fructose. The produced EPS showed antioxidant capacity as well as strong antibacterial activity against Staphylococcus aureus (methicillin-resistant) and Bacillus cereus as hazardous human pathogens, suggesting their application in the food industry. While the produced EPS did not affect cancer cells.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Photo-Catalytic degradation of phenol wastewater: optimization using response surface methodology443944458580610.21608/ejchem.2020.18813.2157ENAmalZaherEnvironmental Sciences and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt.Journal Article20191028Phenolic compounds are classified as hazardous materials that polluted groundwater and surface water resources. The present work have been applied photo- Fenton process for removal of phenolic wastewater, also it concerned with the optimization of the operating parameters that affect the photo-Fenton process. Using the Response Surface Methodology (RSM) to explore the influence of operational variables such as hydrogen peroxide and the iron ion weight ratio, pH, contact time on the removal of phenol. The predicted removal obtained from the model are in a good agreement within the results of experiments with a high correlation regression of 0.993. The expected maximum removal was to be 80.12 % while the experimental results was 81%. The study estimated the influence of [Fe2+/H2O2] weigh ratio from 20-60, contact time from 30-90 min and pH range from 2 to 8, at solution containing of 100ppm phenol. A Box–Behnken design was applied to optimize the operating parameters. The graphical response surface and contour plots were employed to determine the optimum conditions. The results showed that the optimized value of the [H2O2/ Fe2+] = 40.4, contact time= 55 min, and pH=5.2 giving a reduction efficiency of 80.12%.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Synthesis and application of novel reactive dyes based on Dimedone moiety444744558580910.21608/ejchem.2020.24092.2437ENFatma A.MohamedEl Tahrir Street, Dokki
Dokki0000-0002-6684-3751Saadia A.Abd El-MegiedTRD, NRCRaffatMoharebChemistry Department, Faculty of Science, Cairo University, Cairo, EgyptJournal Article20200215The purpose of this paper is to synthesis, characterize and find out properties of some new bifunctional dye Bis (monochlorotriazine) (MCT) and heterobifunctional (monochlorotriazine / sulphatoethylsulphone) (MCT/SES) reactive dyes using Dimedone moiety (5,5-Dimethylcyclohexane-1,3-dione) bearing good color strength, lightfastness, and other favourable properties. The first dye A is synthesized and coupled with diazonium salts having the reactive groups. But the second dye B is synthesiezed of Dimedone moiety (2-amino4,4-dimethy,3-cyano,6-oxo-beno[b] thiophene) then diazotized and coupled with 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) to produce mono azo intermediate. Such product products reacted with 2,4,6-trichloro-1,3,5-triazine in 1:1 molar ratio afforded via nucleophilic displacement with 1,4-phenylenediamine in 2:1 molar ratio to give bis monochlorotriazine reactive dyes thus yielding the new target reactive. The synthesized dyes were applied onto cotton, silk and wool fabric under the typical exhaust dyeing conditions and their dyeing properties were investigated. The results assessed for dyeing indicate high quality dyeing properties However, the homobifunctional (bis MCT) dyes showed higher exhaustion and fixation values, color yield and fastness properties than heterobifunctional (MCT/SES).National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Flashing Losses Emission Evaluation from Crude Oil Storage Tanks445744628581010.21608/ejchem.2020.24509.2467ENEman MohamedMansourEgyptian Petroleum Research InstituteMOHAMEDELAILEgyptian Petroleum Research InstituteSaad MohamedDesoukyEgyptian Petroleum Research InstituteJournal Article20200224Evaporation is a natural phenomenon describing when a liquid turns into gas. Evaporation from roof storage tanks is a major source of product loss in the crude oil industry. Evaporation is a natural phenomenon describing when a liquid turns into a gas. A liquid will tend to evaporate depending on its vapor pressure. A liquid’s vapor pressure is dependent on the surface temperature and composition of the liquid. Evaporation losses should be minimized to help maximize company revenue, meet regulatory requirements, and reduce greenhouse gas. This flashing loss is measured by carrying out the extensive experimental test. Therefore, this paper covers how to estimate oil flashing losses emissions factor (FLEF) percentage for crude oil storage tanks by using the new equation technique to minimize human errors. This statistical technique is a linear association between possible variables to assess flashing loss percentage as a function of operating temperature, sample point height (H1), oil tank height (H2), gas/oil ratio, gas gravity and oil gravity. A good result was obtained from the proposed equation as compared with popular equations by using graphical and statistical exactness. Lastly, modeling testing is ensuring excellent agreement with laboratory work by using new different samples.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Enhanced biological activity of Candida rugosa lipase via immobilization on magnetic nanoparticles446344688581210.21608/ejchem.2020.25662.2512ENMiaadAdnanEnvironment and Water Directorate, Ministry of Science and Technology,Baghdad, Iraq0000-0002-9119-9419Sahar GaziImranEnvironment and Water Directorate, Ministry of Science and Technology, Baghdad, Iraq.Adel SaadiAlsaadiEnvironment and Water Directorate, Ministry of Science and Technology, Baghdad, Iraq.MohammedHasan AllawiDepartment of Medical Laboratory Techniques, Al Maarif University Collage. Anbar, Iraq.Journal Article20200315Magnetic nanoparticles Fe3O4 were synthesized by the co-precipitation method. Magnetic nanoparticles were activated and modified with (3-aminopropyl) triethoxysilane (APTES) and glutaraldehyde (GA), respectively. Then, these nanoparticles were characterized by transmission electron microscope and Fourier transform infrared. Candida rugosa lipase (CRL) was successfully immobilized on GAMNPs by the chemical method via forming a covalent bond between a functional group on an enzyme protein molecule and a reactive group on the surface of solid support by chemical interaction. CRL-Fe3O4 displayed an elevate recovery rate of upward to 1348%, which was a 13-fold improvement in its free one. Compared to a free enzyme, the pH and thermal properties of the immobilized lipase were also increased. This study clearly indicates that GAMNPs could be deemed good support for the immobilization of enzymesNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Design, synthesis and antibacterial activity of N-aryl-3-(arylamino)-5-(((5-substituted furan-2-yl)methylene)amino)-1H-pyrazole-4-carboxamide as Nitrofurantoin® analogues446944818581310.21608/ejchem.2020.26158.2525ENAshraf S.HassanOrganometallic and Organometalloid Chemistry Department, National Research Centre, Dokki 12622, Cairo, Egypt0000-0002-4771-716XGaberO. MoustafaPeptide Chemistry Department, Chemical Industries Research Division, National Research Centre, 12622-Dokki, Cairo, Egypt.
Nahda University, New Beni-Sueif City, Postal code (62521), Beni-Sueif, Egypt.Nesrin MahmoudMorsyOrganometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Dokki 12622, Egypt0000-0003-3636-1767Amr M.AbdouDepartment of Microbiology and Immunology, National Research Centre 12622 Dokki, Giza, EgyptTaghrid S.HafezOrganometallic and Organometalloid Chemistry Department, National Research Centre, Dokki 12622 Cairo, Egypt0000-0002-1958-3520Journal Article20200319Nitrofurantoin® is an effective drug and used for treating urinary infectious diseases. A series of nitrofurantoin® analogues bearing furan and pyrazole scaffolds as N-aryl-3-(arylamino)-5-(((5-substituted furan-2-yl)methylene)amino)-1H-pyrazole-4-carboxamide (7a-g and 9a-f) were designed and synthesized by the condensation of 5-aminopyrazole with 5-nitrofuran-2-carbaldehyde (6) or 5-methylfuran-2-carbaldehyde (8) for evaluation of their antibacterial properties against Gram +ve and Gram -ve bacteria then comparing with nitrofurantoin® as standard drug.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Estimation and validation of a clear sky hourly global solar radiation in Beni-Suef, Egypt448344918581410.21608/ejchem.2020.26474.2538ENHamdyEl GhetanySolar Dept, NRC0000-0003-0081-2562Islam TahaZedanRenewable Energy Science and Engineering Department, Faculty of postgraduate studies for advanced sciences, Beni-Suef University,AhmedMoustafaMechanical Engineering Department, Fayoum University, Fayoum , EgyptAYA GamalAbedElhakaimRenewable Energy Science and Engineering Department, Faculty of postgraduate studies for advanced sciences, Beni-Suef University,Journal Article20200323The availability of hourly and daily solar radiation data is considered one of the important design tools for several solar energy applications. The objective of this work is to develop a model to calculate the hourly solar radiation falling on a horizontal surface in Beni-Suef city, Egypt via a validated simulation model. This model will help the researches in upper Egypt universities along with the designing of solar energy projects in the Beni-Suef city residential and industrial zones. The average solar radiation is calculated daily on hourly basis throughout the year, then the monthly average solar radiation is estimated. The results indicate the maximum value of average solar radiation is in June as 8.1 kWh/m2/day. Solar radiation is also calculated with several tilt angles to find out the optimum tilt angle that enable the surface to receive maximum solar radiation. The calculations focused on empirical equations of solar radiation and the experimental measurements obtained from the nearest station to the location. The model describes solar equations and it can be used to estimate global irradiance. Also, it shows the parameters of the system and climate change of the specific site (Beni-Suef city). Results are validated by comparison between the measured, calculated, and published reference data for the specific site and obtained good agreement with each other. It is found also that the optimal tilt angle that receives maximum solar radiation is 29 deg. which comply with the latitude angle of Beni-Suef city.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Quality Control Criteria of Volatile Ingredients in Certain Mouthwash Products in the Egyptian Market449345018581510.21608/ejchem.2020.26576.2540ENElsayedAbotablDepartment of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt.MaiKhaderDepartment of Medicinal Plants and Natural Products, National Organization for Drug Control and Research, Dokki, Cairo, Egypt.RehabElshemyDepartment of Medicinal Plants and Natural Products, National Organization for Drug Control and Research, Dokki, Cairo, Egypt.MonaMoradDepartment of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt.Journal Article20200325Quality control criteria of active volatile ingredients in the commercial mouthwash products are not sufficient and not probably specify the quantity of active herbal ingredients. Therefore, it is important to apply the most recent advanced techniques including chromatographic methods as GC, HPLC and HPTLC for analysis of these active volatile ingredients. Comparison of different methods was carried out depending on their validation parameters to choose the best method for analysis.. The total amount of volatile ingredients in all the selected mouthwashes was in the effective limit.<br /> HPTLC was the simplest method for identification of volatile ingredients. Moreover, HPLC technique was recommended instead of GC for determination of volatile ingredients that have chromophore in the commercial mouthwash products as resulted from their validation parameters, as well as GC analysis needs a lot of extraction solvent that lead to loss of active volatiles.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Effect of NCO/OH ratio on the physico-mechanical properties of polyurethane-polyurea hybrid spray coatings450345088664810.21608/ejchem.2020.23845.2416ENEl-Sayed MoussaNegimSchool of Chemical Engineering, Kazakh-British Technical University, Almaty, Kazakhstan0000-0002-4370-8995KymbatOmurbekovaSchool of Chemical Engineering, Kazakh-British Technical University, 106 Walikhanov Street, Almaty, 050010, KazakhstanLyazzatBekbayevaBiology Program, School of Distance Education, Universiti Sains Malaysia, Penang, Malaysia0000-0002-0804-1259AbdasssalamAbdelhafizChemistry Department, Faculty of Education, Sure University, Sure, LibyaJournal Article20200211Polyurethane- polyurea hybrid spray coating was prepared by two steps polymerization. In the first step, polyurethane prepolymers (PUs) were prepared by polyaddition reaction based on 4,4\-methylene diphebyl dissocyanate (4,4\ MDI), poly(oxytetramethylene) glycol (PTMG), polyoxypropylene glycol (PPG), and triol (trade name FA-703) with different NCO/OH molar ratios. IR spectroscopy and acid-base titration were used to check the NCO content of the prepolymers. In the second step, polyurethane-polyurea hybrid resin was prepared by mixing the polyurethane prepolymer (PU) with polyoxypropylenediamine (POPA) at constant molar ratio (1: 1). The effect of NCO/OH ratios on physico-mechanical properties of the polyurethane-polyurea hybrid coating films was studied including viscosity, tensile strength, elongation at break, tear strength, contact angle and adhesion. The results obtained showed that tensile strength, contact angle and hardness increased, while viscosity, elongation, adhesion and tear strength decreased with increasing NCO/OH molar ratio.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Dihydropyrimidines as Precursors for Synthesizing of Oxoketene gem-Dithiol and 1,2-Dithiol-3-Thione, a Facile Synthesis and Convenient Reaction Transformations450945208664910.21608/ejchem.2020.26980.2555ENEntesarHassanChemistry Department, Faculty of Science, South Valley University, QenaSalemZayedChemistry Department, Faculty of Science, South Valley University, QenaAsmaaAboziedChemistry Department, Faculty of Science, South Valley University, Qena.Journal Article20200331In the present work the authors could synthesize the substrates oxoketen gem-dithols 5, ketenedithioacetal 6 and 1,2-dithiol-3-thione 39 from compounds bearing both nucleus indole and dihydropyrimidines together due to their biological and pharmacological activities. In this paper, and as a result of biological and pharmacological activities of oxoketen gem-dithols, ketenedithioacetal and/or 1,2-dithiol-3-thione; we synthesized various derivatives of them via indole and dihydropyrimidine in the form of either condensed or fused derivatives. We used ecofriendly methods such as pure orange juice as a green solvent and as an acid catalyst in the same time to prepare, 1-[2-imino-4-(1H-indol-3-yl)-6-methyl-1,2,3,4-tetrahydropyrimidin-5-yl]-ethan-1-one 4a and/or 1-[4-(1H-Indol-3-yl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidin-5-yl]-ethan-1-one 4b. Subsequently, the substrate 4b was treated with different reagents to afford, 1-(4-(1H-indol-3-yl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-3,3-dimercaptoprop-2-en-1-one 5 and/or 1-(4-(1H-indol-3-yl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-3,3-bis(methylthio)prop-2-en-1-one 6. Compounds 5 and/or 6 were used as synthons to get various heterocyclic compounds such as 3-(4-(1H-indol-3-yl)-6-methyl-2-(piperidin-1-yl)-1,4-dihydropyrimidine-5-carbonyl)-2-thioxochroman-4-one 16 and/or 4'-(1H-indol-3-yl)-2-mercapto-6'-methyl-6-(methylthio)-2'-thioxo-1',2',3',4'-tetr-ahydro-[4,5'-bipyrimidin-e]-5-carbaldehyde 18. The newly synthesized compounds have been in vitro examined as antimicrobial agents, and some of them showed a promising activity. All newly synthesized compounds have been characterized by means of elemental analyses, IR, 1H-NMR and MS.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Reclamation of aqueous solution synthetically polluted with endocrine disturbing chemicals by commercial NF membrane452145318818110.21608/ejchem.2020.27070.2558ENTarek SamirJamilWater Pollution Control Department, National Research Center, Dokki, Giza, Egypt0000-0002-1856-8046RababNasr El SheikhNational Research center, Dokki, Cairo, EgyptRolandHasenederInstitute of Thermal, Environmental and Natural Products Process Engineering, 09596 Freiberg, GermanyMichaelHoyerInstitute of Thermal, Environmental and Natural Products Process Engineering, 09596 Freiberg, GermanyJournal Article20200401The target of this study is the removal of Di butyl phthalate, Bisphenol – A and Paracetamol as endocrine disrupting chemicals from aqueous solution using NF99 as a commercial nanofiltration membrane at different operating parameters of pressures (10, 20 and 30 bar), pH (3-11) and different EDCs concentrations using % TOC removal as indicator for the efficiency of the understudied membrane. It was found that the % TOC rejection of Paracetamol was the highest (86 %) at pH 10. The endocrine disrupting chemicals rejection was detected to be increased with the increase of operating pressure till 20 bar. The impactt of pH on %TOC removal of EDCs was altered depending on the pka of each compound. Moreover, the anti-fouling property of NF 99 membrane has been investigated by evaluating the membrane rejection and flux using humic acid as a common natural organic matter. The experimental design was estimated by MINITAB software and the results was analyzed by the factorial analysis which suggest that the pH is the most significant factor affecting the removal process.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Experimental investigation of an energy saving system using Phase Change Materials in buildings453345458818210.21608/ejchem.2020.27252.2565ENHamdyEl GhetanySolar Dept, NRC0000-0003-0081-2562Wael IbrahimAlyProfessor of Mechanical Engineering
Faculty of Industrial Education
Helwan UniversityHany AhmedShalataFaculty of Industrial Education College, Helwan UniversityAmr IbrahimEidFaculty of industrial Education, Helwan UniversityKhaledAbdelwahedDepartment of Automotive Technology, Faculty of Industrial Education,
Helwan University, 11282, Cairo, EgyptJournal Article20200404In this paper, experimental research has been conducted intended for using Phase Change Materials (PCM) by incorporating it with the building layers walls. The effect of involving PCM volume ratio and orientation on the thermal efficiency and thermal comfort was experimentally studied. Two identical rooms models have been constructed. The first model was used as a standard room as a reference one without using PCM and the second model has the PCM layers and used for all experimental testing works. Both rooms are installed at National Research Center, NRC, Giza, 30.08° N latitude, Egypt. The PCM used in this experimental work was paraffin wax having a melting point of 29 °C. Many cases have been studied based on the south wall, east wall and west wall respectively. It is found that using PCM caused a considerable reduction in the indoor air temperature and consequently reduction in the cooling load that minimizes the building energy consumed. It is concluded that the Percentage of the cooling load reduction of the zone by using PCM and according to cases and for peak hour in day was 19.2 % with PCM for East, West and South walls together, followed by 16.8 % for South wall only, followed by 12.7 % with West wall only and followed by 10.5 % for East wall only. It is found that the best case in cooling load reduction of the room for peak hours of PCM for South, West and East walls together by 19.2 %. The experimental results of the present study were validated with the corresponding experimental study of Mushtaq 2018 with a considerable agreement between the daily cooling load reduction per space volume and the cooling load reduction ratio. It is known that the cooling load reduction ratio is referred to the energy-saving which proved that using PCM in the building will contribute to energy saving in residential buildingNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Chemical Composition, Rheological, Organoleptical and Quality Attributes of Gluten-Free Fino Bread454745638818410.21608/ejchem.2020.28290.2597ENEnayat MahmoudHassanFood Science Department, Faculty of Agriculture, Cairo University, Giza, EgyptHany AzizFahmySpecial Food and Nutrition Department, Food Technology Research Institute, Agricultural Research Center, Giza, EgyptShimaaMagdySpecial Food and Nutrition Department, Food Technology Research Institute, Agricultural Research Center, Giza, Egypt0000-0003-2290-1566Magda IbrahimHassanFood Science Department, Faculty of Agriculture, Cairo University, Giza, EgyptJournal Article20200419Preparation and evaluation of acceptable gluten-free Fino bread (pearl millet, rice and corn flours) were targeted. Rheological properties of six blends were determined by Mixolab and Alveograph. Sensory evaluation of bread samples was done by ten mothers. The most acceptable samples were selected for chemical, antioxidant, texture, physical, microbial analysis and sensorial evaluation by 20 celiacs from Abu-Rish children’s hospital. Pearl millet flour has high protein and fiber (12.11 and 2.92 %, respectively), low carbohydrate (77.88 %), high minerals content, high antioxidant activity (55.31 %), high phenols and flavonoids (474.29 mg Gallic/100 g and 80.43 mg quercetin/100g, respectively) compared to corn or rice flours. High dough stability was in the M.R.RS blend (34 g millet, 34 g rice and 32 g rice starch). The highest P (resistance to extension), and the lowest L values (dough extensibility) were found in the M.R.C.RS blend (23 g millet, 23 g rice, 23 g corn and 31 g rice starch). Mothers preferred M.R.RS.E bread (M.R.RS+18g Egg), while their children preferred the same formula without egg (M.R.RS). The M.R.RS.E sample had the highest protein, fiber and mineral (Ca, Zn) contents. It was the largest specific volume (3.41 cmᶾ/g) and high freshness (404.89). This work achieved the goal by making acceptable gluten-free Fino bread using local materials with appropriate nutritional value for celiac patients.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Recognition and adsorption characteristics of tramadol hydrochloride molecules in molecular imprinted poly(MAA-co-EGDMA)456545788863610.21608/ejchem.2020.26005.2517ENSamir M.M.Morsipolymers and pigments dept. national research centreAlianN.A.Department of Chemistry, Faculty of Science, Al-Azhar University, Cairo, Egypt,Naglaa N.Abd-elFatahAnalytical Toxicology Laboratory, Forensic Medicine Authority, Ministry of Justice, Cairo, Egypt.Morsi M.MorsiGlass Research Department, National Research Center, 33 El Bohoth St.,Dokki, Giza, Egypt.NihalShakerFaculty of Science, Al-Azhair UniversityJournal Article20200316A simple method for adsorption and recognition of tramadol-HCl in molecular imprinted poly (methacrylic acid-co-ethylene glycol dimethacrylate); poly (MAA-co-EGDMA), is described. Seven tramadol imprinted polymers (TIPs) were synthesized based on tramadol hydrochloride as the template molecule, methacrylic acid (MAA) as a functional monomer, ethylene glycol dimethacrylate (EGDMA) as a crosslinker, chloroform as a porogenic solvent and benzoyl peroxide (BP) as an initiator. Other seven non-imprinted polymers (NIPs) were prepared with the same compositions as the TIPs without the template molecule. A simple method for determination of Tramadol concentration by optical absorption method was described. The effects of crosslinker and functional monomer concentration, soaking time and the pH on the adsorption efficiency of tramadol by the polymers were studied. TIPs exhibited more adsorption affinity than their NIPs counterparts as they acquired recognition sites to capture the tramadol molecules. The TIP polymer with 15 mmol EGDMA and 1.15 mmol MAA stirred for 3h at 7 pH tramadol solution showed 90% adsorption capability for the tramadol, while the corresponding NIP sample showed 55.6% adsorption. SEM images showed the presence of (micro/meso/macro) pores in such TIP sample.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Application of the Response Surface Methodology for Green synthesis of silver nanoparticles using a plant extract of shallot457945888888810.21608/ejchem.2020.25805.2507ENThi Thanh ThuyNguyenNong Lam University, Ho Chi Minh City
Linh Trung ward, Thu Duc district, Ho Chi Minh City, VietnamHoang HuyLeNong Lam University, Ho Chi Minh City
Linh Trung ward, Thu Duc district, Ho Chi Minh City, VietnamThuy VyTruongNong Lam University, Ho Chi Minh City
Linh Trung ward, Thu Duc district, Ho Chi Minh City, VietnamThi Phuong ThuyDoanNong Lam University, Ho Chi Minh City
Linh Trung ward, Thu Duc district, Ho Chi Minh City, VietnamThi Thanh TamNguyenIndustrial University of Ho Chi Minh City, VietnamThi My LanNguyenUniversity of Science - Vietnam National University, Ho Chi Minh City, VietnamJournal Article20200313Biogenic silver nanoparticles have been green-synthesized using the aqueous extract of shallot (Allium ascalonicum) as the reducing and stabilizer agents. The UV-vis spectrum of the biosynthesized silver nanoparticles showed a characteristic surface plasmon resonance peak at 414 nm, confirming the presence of silver nanoparticles. Also, the Central Composite Design under Response Surface Methodology had been applied to optimize the effects of independent factors such as the stirring time, extract volume, silver nitrate concentration, and the stirring rate on the response value that is the maximum absorbance of biosynthesized silver nanoparticles. The results showed that all variables contributed significantly to the biosynthesis of AgNPs. The R-square value of 0.9873 of the obtained model indicated a good correlation between the predicted and the observed values. Under the optimized conditions, the biosynthesized silver nanoparticles had their crystallite nature and the mean sizes of the biosynthesized AgNPs were 17 nm based on Scherrer equation. While, DLS measured the particles sizes of the AgNPs were 49.5 nm with the polydispersity index of 0.690. The SEM image revealed that the sharp of AgNPs was in the spherical forms. The chemical nature of the synthesized AgNPs was also characterized by using FT-IR.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Isolation, identification, thermal analysis, DFT calculations and antioxidant activity studies of lichen metabolites norstictic acid and evernic acid Abstract458946058955110.21608/ejchem.2020.28473.2611ENMohamed A.ZayedDepartment of chemistry, Faculty of Science, Cairo University (D.Sc. Anal.Chem.)0000-0003-2425-6329Nedeljko TManojlovicProfessor
Medical Faculty, University of Kragujevac,
Svetozara Markovica 69,
34000 Kragujevac, Serbia
Phone: 034 306 800 ext. 226
Fax: 034 306 800
E-mail: ntm@kg.ac.rs
Web: www.medf.kg.ac.yuJournal Article20200422This manuscript deals with successful trials to isolate two lichen acids (Noristicic and Everinic acids) from natural sources. The isolated compounds were purified, crystallized from suitable solvent, and their melting points were measured. Their structures were identified by elemental analyses, spectroscopic tools (Electronic spectra, FT-IR, Mass), and finally using thermal analyses (TG, DTG and DTA). Their thermal fragmentation pathways were compared with mass fragmentation. These fragmentation pathways were compared with the theoretical molecular orbital calculations (DFT- MOCs). The molecular structures of the title compounds in the ground state were optimized by a DFT method using B3LYP functional combined with 6-311G** (d) basis set. Calculations were carried out using GAUSSIAN 09 suite of programs. In addition, antioxidant activity of norstictic acid and everinic acid were determined. The results showed that both compounds exhibited antioxidant activity, but that the norstictic acid showed several times higher activity than evernic acid. This study refers to successful obtaining of these biologically active acids from natural sources and of wide biomedical applications.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Cytotoxicity of New Selenoimine, Selenonitrone and Nitrone Derivatives Against Human Breast Cancer MDA-MB231 Cells4607461310265710.21608/ejchem.2020.31747.2675ENBatool SalehHaddad1Department of Chemistry, College of Science, University of Basrah, Basrah, IraqAli A. A.Al-Shawi2 Basrah - Iraq
University of Basrah
College of Education for Pure Sciences
Chemistry department0000-0002-0690-4612Journal Article20200603A series of new nitrone, selenoimine and selenonitrone derivatives were synthesized. Nitrone and selenonitrone derivatives were synthesized through the condensation reaction between N-mono substitutedhydroxylamine and carbonyl compounds substituted with electron donating groups, such as di(4-methoxy)benzoyl diselenide, 4-(N, N-dimethylamino) benzoyl selenonitrile and 4, 4'-di(N, N- dimethylamino)benzil, afforded a variety of new nitrone and selenonitrone compounds. Selenoimine derivative was synthesized through the condensation reaction between tert-butyl amine and (4-methoxybenzoyl selenonitrile). The yield of synthesized compounds (N1, N2, N3, N4 and N5 were (66, 60, 61, 62 and 45) %, respectively. The structures of the synthesized compounds were characterized by FT-IR, 1H-NMR, 13C-NMR, elemental analysis and Mass spectroscopy. Cytotoxicity of selenonitrone (N1) and selenoimine (N3) derivatives against breast cancer cells (MDA-MB231) were evaluated for 24 and 48 h via MTT assay. The IC50 value of compound N1 were 1.714 and 1.897 µM for 24 h and 48 h, respectively. The IC50 values of compound N3 were 1.438 and 2.469 µM for 24 h and 48 h, respectively. The results suggested selenonitrone (N1) and selenoimine (N3) as anti-breast cancer potential lead compound with future merit investigations.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Hydrophilic Coating Layer by Layer on Polyethersulfone Membranes for Desalination4615462312006810.21608/ejchem.2020.44808.2910ENHeba AbdallahMohamedChemical engineering department , Engineering division, National research centre0000-0003-4766-7374AYMANELGENDINATIONAL RESEARCH CNTRE EGYPT0000-0002-9665-5735Marwa EbrahimShalabyAssistant Professor chemical engineeringJournal Article20201002Water Desalination is becoming an issue for saving the required potable and drinking water due to shrinkage of pure water. Thus, this work deals with antifouling membrane preparation using poly meric compounds of Polyethersulfone/ Polyvinylalcohol (PES/PVA) with nanomaterials to produce antifouling membrane for water desalination. The PES membrane has prepared by phase inversion process followed by different coating ways. The coating with PVA provided the highest hydrophilic surface. The characterization of prepared membranes was carried out using various analysis methods such as scanning electron microscopy (SEM), mechanical properties, porosity and contact angle. The pore size distribution of prepared membranes was determined using the Brunauer-Emmett-Teller (BET) method. The result showed that the best membrane performance was membrane which has a coating with PVA layer, where rejection reached to 99 %, 95% and 88% as a function of concentration 500, 1500, and 3000 ppm respectively, while the permeate flux reached to 48.4 L/m2.h, 32.3 L/m2.h and 21.5 L/m2.h as a function of concentration 500, 1500, and 3000 ppm respectively.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Preparation of Polyamide-6/zeolite-Y Hybrid Membranes, and the evaluation of their Structural, Physical and Mechanical Properties462546338002610.21608/ejchem.2019.18717.2155ENOula AdnanHommaidDepartment of Chemistry, Faculty of Science, Damascus University, Syrian Arab RebuplicIman MostafaAl BakriDepartment of Chemistry, Faculty of Science, Damascus University, Syrian Arab RebuplicJournal Article20191027A well-defined crystalline structure of zeolite-Y, having particles size in the range from 100 to 270nm, was prepared using hydrothermal method.<br /> The obtained zeolite was further used to fabricate polyamide-6/zeolite-Y (PA6/ZY) hybrid membranes. The addition of ZY modified the smooth surface of PA6 membrane, and the Scanning Electron Microscopy (SEM) images of PA6/ZY became rough with increasing porosity. X-ray diffraction (XRD) revealed an exfoliated structure of the hybrid membranes. Moreover, Fourier transforms infrared spectroscopy (FTIR) of PA6/ZY membranes indicated the presence of some interaction between the PA6 and ZY, which was manifested itself by the slight increase in the intensity of PA6 bands after the addition of ZY.<br /> The results indicated that the tensile strength and failure strain decreased linearly with the increase of ZY content in the hybrid membranes. On the other hand, porosity and bubble point pore diameter increased gradually and reached a maximum when 4% ZY was added. It was concluded that 4%w loading of ZY in the hybrid membranes gave a balance of desirable properties and the hybrid membrane could be considered promising for water separation technology.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Compatibility of PVC/TEA Blends Membranes Preparation, Characterization, Evaluation and Their Water Permeation Properties463546448817910.21608/ejchem.2020.21999.2314ENHossamTieamaAdvanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab City, 21934 Alexandria, EgyptAhmedDomaPolymeric Materials Research Dept., Advanced Technology and New Materials Research Institute (ATNMRI), City for Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab City, 21934 Alexandria, EgyptMarwaShowmanAdvanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab City, 21934 Alexandria, Egypt.Elbadawy AbdelazizKamounCity of Scientific Research and Technology ApplicationsJournal Article20200105Many of the thermo stable and chemical-resistant polymers used for ultra filtration (UF) membranes such as cellulose triacetate (CTA) , polyvinyl chloride (PVC) which are quite hydrophobic, and are possible to prepare a new polymer with the requisite properties by modification for a specific application. In order to improve the pure water flux of UF of PVC membranes, some hydrophilic components were blended with PVC for water treatment. Triethanolamine TEA was introduced as a modifier to hydrophilize PVC and enhance the permeation flux by changing the membrane morphology. (PVC/ TEA) have been prepared by solution blending. The compatibility and the miscibility of PVC/TEA blends in THF were studied and characterized. Modifications of the surface morphology, wet ability and porosity are proved by scanning electron microscope images, contact angle measurements and permeability respectively. It was found a better wet ability, permeability and porosity of the modified PVC films than that of the membranes made from pure PVC. PVC/TEA membranes were characterized by FTIR, morphologically using SEM, thermally using TGA, and mechanically using universal testing machine. Permeation flux of PVC/TEA membranes was 10947 L/D/M2 and salt rejection performance for mono layer membrane was 33.7 % for 3% NaCl solution. Ion exchange capacity (IEC) for (PVC/TEA) membrane was 2.5 m eq/gm., whereas contact angle and water uptake were 44.12 and 21% at room temperature respectively. The results showed that the permeate quality and quantity are almost stable upon long run, thus PVC/TEA membranes can be used effectively for water treatment purification.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Influence of polymers loaded with ZnO and TiO2 nanoparticles on thermal resistance of archaeological Wood4645465711873110.21608/ejchem.2020.42596.2859ENEmanNabilCheops Museum, EgyptNaglaaMahmoudConservation Dept., Faculty of Archeology, Fayoum University, EgyptAhmedYoussefNational Research Centre, 30 El-Tahrir StreetSamirKamelCellulose and Paper Department, National Research Centre, El Behooth St., Dokki -Giza- Egypt.Journal Article20200911The aim of the current study was to examine the efficacy of Regalers 1126, Regalers 1094, and Polyurethane with and without zinc oxide nanoparticles (ZnO-NPs) and titanium oxide nanoparticles (TiO2-NPs) on the thermal resistance of archaeological wood. Cedar and sycamore woods were selected as archaeological woods and aging was performed at 100°C for 400 hours, which is equivalent to 25 years. Fourier transform infrared spectroscopy (FT-IR) was used to study the change in the functional groups. The X-ray analysis (XRD) examined the change of wood crystallization of woods after the consolidation process. Moreover, the changes in the morphology of untreated and treated woods were identified by Scanning Electron Microscopy (SEM). Furthermore, the thermal stability of untreated and treated woods was investigated by thermal gravimetric analysis (TGA). The mechanical decay of treated cedar and sycamore woods by consolidation materials were described. Correspondingly, the color change as indicated by CIE Lab color coordinates of consolidated woods after aging was investigated and the color change rate of sycamore wood is higher than that of cedar wood after the consolidation process. Finally, utilize of TiO2-NPs played a larger role in the weight gain and mechanical properties of samples than ZnO-NPs after the consolidation procedure.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-2285631120201101Synthesis, spectroscopic investigation and bactericidal effect of Poly (vinyl alcohol) (PVA) - iron nanoparticles (Fe NPs)4659466910967710.21608/ejchem.2020.34685.2725ENAfafSarhanPolymer Research Group, Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt0000-0002-2892-6740Journal Article20200704This study aimed to synthesize Poly (vinyl alcohol) - iron nanoparticles (PVA-Fe NPs) via two different methods, the green electrochemical technique in presence of (PVA) which rapid and eco-friendly and by adding different ratios of (Fe-NPs) to PVA, then exposed to different time of UV-irradiation. Characterization of the resulting PVA-Fe NPs was performed using many spectroscopic and analytical techniques including, UV–Vis spectrophotometry, Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Production of the Fe NPs was verified by appearance of absorbance peaks at about 457 – 462 nm in UV spectra which attributed to surface plasmon resonance. The band gap energy values show decrease with increasing Fe NPs. FTIR spectra confirm the interaction between PVA polymer and Fe- nanoparticle. All the developed PVA-Fe NPs displayed antibacterial efficiency against both Staphylococcus aureus and Escherichia coli bacteria. Moreover, the antibacterial efficiency enhanced by increasing Fe content and UV irradiation time.