Synthesis, Characterization and Antimicrobial Activity of Novel Pyrrolidine-3-Carbonitrile Derivatives,
M. F.
El-Mansy
Department of Organometallic and Organometalloid Chemistry, National Research Centre, 33 El-Bohouth St.(former EL Tahrir st.), P.O. 12622, Dokki, Giza, Egypt
author
Leila
Boulos
Department of Organometallic and Organometalloid Chemistry, National Research Centre, 33 El-Bohouth St.(former EL Tahrir st.), P.O. 12622, Dokki, Giza, Egypt
author
M. E.
Mohram
Microbial Chemistry Department, National Research Centre, 33 El-Bohouth St.(former EL Tahrir st.), P.O. 12622, Dokki, Giza, Egypt
author
text
article
2018
eng
Newly synthesized pyrrolidine-3-carbonitrile derivatives were evaluated as antimicrobial activity. The structures of these derivatives were derived from reactions of 1-(4-methoxyphenyl)-4-oxopyrrolidine-3-carbonitrile with stabilized phosphorus ylides, Wittig-Horner reagents, trialkylphosphites, as well as tris(dialkylamino)phosphines
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
391
400
https://ejchem.journals.ekb.eg/article_7327_7a3cfba0a47bcc3d6fbf97d674b5fed4.pdf
dx.doi.org/10.21608/ejchem.2018.3115.1263
Refractive Indices, Molar Refractions, Surface Tension and Polarizability For Binary Mixtures of Benzyl Alcohol with Glycols and Their Deviations
Sahar
Tawfik
Petroleum Refining Division
Egyptian Petroleum Research Institute (EPRI)
1-Ahmed El-Zomor street, Hai Al-Zehour, Nasr City ,
Cairo , Egypt.
author
Farid
Farag
Petroleum Refining Division
Egyptian Petroleum Research Institute (EPRI)
1-Ahmed El-Zomor street, Hai Al-Zehour, Nasr City ,
Cairo , Egypt.
P.O Box: 11727
Tel: +202-2745902
Fax: +202-2747433
E-mail:sahartawfikepri@yahoo.com
author
text
article
2018
eng
ABSTRACT Densities (ρ), refractive indices (nD) and surface tension (σ) have been measured as a function of composition for binary mixtures of benzyl alcohol (BA) with ethylene glycol (EG), diethylene glycol (DEG) and triethylene glycol (TEG)] at ambient temperature and atmospheric pressure. Using these data, excess molar volume (VE), excess refractive indices (nDE), molar refraction deviation (ΔR), excess surface tension (σE) and the polarizability (α) have been calculated. The results were interpreted interms of specific interactions between the unlike molecules
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
401
413
https://ejchem.journals.ekb.eg/article_7315_0c5b92362eaf35b24632c279f3805444.pdf
dx.doi.org/10.21608/ejchem.2018.2347.1195
Investigation of Effective Treatment Techniques for Olive Mill Wastewater
Enas
Aboutaleb
Water Pollution Research Department, National Research Centre, ,
33 Behooth St., P.O. Box 12622, Dokki, Giza, Egypt
author
Gamal
Kamel
Water Pollution Research Department, National Research Centre, ,
33 Behooth St., P.O. Box 12622, Dokki, Giza, Egypt
author
Mohamed
Hellal
Water Pollution Research Department, National Research Centre, ,
33 Behooth St., P.O. Box 12622, Dokki, Giza, Egypt
author
text
article
2018
eng
Selection of cost-effective treatment modules for high saline wastewater produced from the olive mill is a challenging task. The aim of this study is to select the most effective technology applied to treat Olive mill wastewater. Several trials using various techniques were carried out to treat wastewater produced from pickling olives and olive oil manufacturing; for instance, anaerobic-aerobic, coagulation/flocculation, and electrocoagulation. The characteristics of olive manufacturing raw wastewater in terms of total dissolved solids (TDS), chemical oxygen demand (COD) and oil and grease were 10032, 9174, and 914.8 mg/l respectively. The results showed that electro-coagulation technique with aluminum electrodes and operating parameters of 30 voltage and 1.5 hours achieved COD removal rate 84%. However, the residual concentration (900 mgO2/l) still needs further treatment. Aerobic treatment using activated sludge was applied after electrocoagulation. The results showed that the use aerobic treatment after electrocoagulation is more efficient than the use of anaerobic. Analysis of the treated water showed that the maximum COD removal efficiencies were 98% at optimum conditions. The effluent quality meets the discharge regulatory standard. Consequently, the electrocoagulation followed by aerobic process can be considered as a reliable, safe and cost-effective method for the treatment of olive mill wastewater.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
415
422
https://ejchem.journals.ekb.eg/article_7316_8af8d9cd9e53ceadf9c446182e934b20.pdf
dx.doi.org/10.21608/ejchem.2018.2655.1224
The Antiproliferative Activity and Molecular Docking Studies of Some Sulfonamides against Cancer Cell Lines Compared to Normal Cells
Abdel-Mohsen
Soliman
Department of Therapeutic Chemistry National Research Centre, El-Buhouth St., P.O. 12622, Dokki, Giza, Egypt
author
Mohsen
Kamel
Department of Therapeutic Chemistry National Research Centre, El-Buhouth St., P.O. 12622, Dokki, Giza, Egypt
author
Ahmed
Eweas
Department of Therapeutic Chemistry National Research Centre, El-Buhouth St., P.O. 12622, Dokki, Giza, Egypt
author
Joanna
Wietrzyk
Laboratory of Experimental Anticancer Therapy, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland
author
Magdalena
Milczarek
Laboratory of Experimental Anticancer Therapy, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland
author
text
article
2018
eng
Some new and known substituted 1,2,3,4-tetrahydroacridines incorporated at their position nine with various sulfa drug or thiosemicarbazide moieties were synthesized. Biologically, these compounds were investigated for their antiproliferative activity against human breast cancer (MCF-7) cell line compared to murine fibroblast normal cell line (BALB/3T3). The results were calculated as the IC50 (inhibitory concentration 50%) compared with Cisplatin as control. Furthermore, a docking simulation study was carried out to predict the inhibitory mode of action of the most active compounds.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
423
429
https://ejchem.journals.ekb.eg/article_7317_3d0f0527832fe7e9ae480c29c8ec653a.pdf
dx.doi.org/10.21608/ejchem.2018.2934.1242
Synthesis of Some Bioactive Compounds and its Application as Antimicrobial Agents for Plastic Industry
Ahmed
Zaiton
Research and development department, Egyptian company for plastic industry (Elsewedy-EgyPlast) 10th of Ramadan City, Egypt.
author
Yasser
Assem
Polymers and Pigments Department, National Research Centre
author
Amany
Arafa
Department of Microbiology and Immunology, National Research Centre
author
Ahmed
Momen
Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt.
author
Said
Said
Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt.
author
text
article
2018
eng
New biocidal compounds were synthesized by reacting 4-hydroxy acetophenone with ethyl cyanoacetate and 2-chlorobenzaldehydes and ammonium acetate in absolute ethanol to give 4-(2-chlorophenyl)-2-hydroxy-6-(4-hydroxyphenyl) nicotinonitrile which by epoxidation gives 4-(2-chlorophenyl)-6-(4-(oxiran-2-ylmethoxy) phenyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile. Another compound was synthesized by reacting 4-hydroxy acetophenone with ethyl cyanoacetate and 4-nitrobenzaldehydes and ammonium acetate in absolute ethanol to give 2-hydroxy-6-(4-hydroxyphenyl)-4-(4-nitrophenyl)nicotinonitrile witch by epoxidation gives 4-(4-nitrophenyl)-6-(4-(oxiran-2-ylmethoxy) phenyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile. The synthesized four compounds and standard biocide (Zn omadine) were added separately to LDPE and HDPE and polystyrene in the same ratio (0.1 phr) followed by studying the melt flow rate and mechanical properties and electrical properties of LDPE and HDPE and polystyrene. In addition the biological activity of the prepared blends with LDPE or HDPE or PS were studied against two local isolates E. coli sero type O145 as gram-negative bacteria and S. epidermidis as gram-positive bacteria The antimicrobial test was performed quantitatively using the standard test method .
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
431
445
https://ejchem.journals.ekb.eg/article_7318_60d42b5841b7c36e18c9e44cab99eaa4.pdf
dx.doi.org/10.21608/ejchem.2018.2947.1243
Structural, Thermal and Optical Modifications of Chitosan due to UV-Ozone Irradiation
Nabawia
Abdelzaher
Department of Textile Metrology, Division of Chemistry, National Institute of Standards (NIS), Ministry of Higher Education and Scientific Research.
author
Gehan
El-Bassyouni
Refractories, Ceramics and Building Materials Dept., National Research Centre, Dokki, Cairo, Egypt
author
Manal
Moselhey
Al-Safwa High Institute of Engineering, Cairo, Egypt
author
Osiris
Guirguis
Biophysics Department, Faculty of Science,Cairo University, Giza, Egypt
author
text
article
2018
eng
The present work focused on modifying the chitosan structure which has noticeable places in advanced research. The effect of UV-ozone irradiation with different exposure doses (9.68 x 10-14, 19.35 x 10-14, 29.03 x 10-14 and 38.75 x 10-14 J/m2) on the microstructural, thermal stability and optical properties of chitosan was studied. X-ray diffraction (XRD), selected area electron diffraction (SAED), high-resolution transmission electron microscopy (HRTEM), optical parameters techniques as well as Differential thermal analysis (DTA) and thermogravimetric analysis (TGA and DTG), were performed. The obtained results indicated that, effects on semi-crystalline structures have occurred. Detected variations in XRD, SAED, HRTEM, DTA and TGA analyses under investigation may be attributed to the different degrees of crystallinity, induction of structural changes and molecular configuration of chitosan upon exposure to UV-ozone. The results confirmed that the UV-ozone irradiation plays a role in refining the microstructure and changes occurring in chitosan matrix for future biomedical applications.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
447
460
https://ejchem.journals.ekb.eg/article_7319_9291d81b9224398bef4291ccd6833a05.pdf
dx.doi.org/10.21608/ejchem.2018.2904.1241
Development and Validation of Simple Reversed Phase Method for Separation and Quantification of Tocopherols in Edible Oils
Ibrahim
Tahoun
National Institute of Standards, Tersa St, El-Matbah, Haram, P. O. Box: 136 Giza, Code No: 12211 Giza, Egypt
author
Adel
Shehata
National Institute of Standards, Tersa St, El-Matbah, Haram, P. O. Box: 136 Giza, Code No: 12211 Giza, Egypt
author
text
article
2018
eng
A simple reversed phase high performance liquid chromatography method for separation and quantification of tocopherols in edible oils has been developed and validated. In the developed method C18 column was used and a mixture of isopropanol and water was used as mobile phase to achieve baseline separation of all isomers. Tocopherols were separated completely with very good peak resolution in 45 minutes and were detected using diode array detector. No pretreatment of the samples was needed, except dilution in ethanol. The validation measurements showed that the developed method was suitable for quantification of tocopherols in edible oils.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
461
468
https://ejchem.journals.ekb.eg/article_7320_eb5733087ef318c491da064032e58397.pdf
dx.doi.org/10.21608/ejchem.2018.2877.1235
Comparative Study on the Reaction of Organophosphorus Reagents with Vanillin from Moringa Oleifera Plant. Synthesis of Phosphoranylidenepyranone, Dioxaphospholane and Butenethione Derivatives of Anticipated Antitumor Agents
M.A.
Abd-El-Maksoud
Department of and Organometalloid Chemistry, National Research Centre, 33-El-Buhouth St., P.O. 12622, Dokki, Giza, Egypt
author
S.A.
Saleh
Horticultural Crops Technology Dept., National Research Centre, 33-El-Buhouth St., P.O. 12622, Dokki, Giza, Egypt
author
A.M.
Abdallah
Horticultural Crops Technology Dept., National Research Centre, 33-El-Buhouth St., P.O. 12622, Dokki, Giza, Egypt
author
Fouad
Soliman
Department of and Organometalloid Chemistry, National Research Centre, 33-El-Buhouth St., P.O. 12622, Dokki, Giza, Egypt
author
text
article
2018
eng
Vanillin which can be isolated from Moringa oleifera plant was allowed to react with different nucleophilic organophosphorus reagents. Treatment of 4-hydroxy-3-methoxybenzaldehyde (vanillin) with the active phosphacumulene ylides (N-phenyliminovinylidene)- and (2-oxovinylidene)-triphenylphosphorane afforded the homocyclic phosphoranylidene-cyclobutylidenes. On the other hand, its reaction with the satabilized phosphoniumylide, acetylmethylenetriphenylphosphorane gave the corresponding butenone, which reacted with the active phosphacumulene to give finally the pyran derivative. Next, the phenyliminophenol derivative was obtained from the reaction of vanillin with the iminophosphorane. Moreover, dioxaphospholane oxide was isolated from the reaction of vanillin with hexamethylphosphorus triamide. Finally, the butenethione was generated from the reaction of Japanese reagent with vanillin.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
469
478
https://ejchem.journals.ekb.eg/article_7321_e2f7b0b4c57ae68741bdc70741f7e29c.pdf
dx.doi.org/10.21608/ejchem.2018.2987.1253
A New Approach for Preparation of Smart Conductive Textiles by Polyaniline through in-situ Polymerization Technique
Mohmmed
Abdel Menaem Ramadan
National Research Centre, 30 El-Tahrir Street
author
Ahlam
Fathi
National Research Centre, Physical Chemistry Department
author
Sahar
Shaarawy
textile research division , national research center, Dokki, Cairo Egypt
author
Manal
El-bisi
National Research Centre
author
text
article
2018
eng
In this work, cotton fabrics were treated by aniline (Pan) monomer. The treatment bath was consists of Aniline (ANI) at different concentrations (0.1-0.5 mole/l), oxidizing agent (0.2 mole/l) as Ferric Chloride and doping agent as Egyptol(0.2 g/l) at different pH( 1-4 ) which adjusted by hydrochloric acid (HCl). This treatment carried out in order to deposit polyaniline (PANI) through in-situ polymerization technique to achieve conductive cotton fabrics in one step. The resulted fabrics were monitored by different tests as electricical measurements (conductivity, dielectric constant), color depth (K/S), square meter weight, tensile strength and elongation. To verify the presence of polyaniline, the treated fabric sample was examined using energy dispersive X-ray spectrum (EDX) and scanning electron microscopy (SEM).The results of tests show that, the electrical measurements, color depth, square meter weight, tensile strength and elongation increase by increasing aniline concentration. This behavior arises from increasing the extent of the conductive polymer on the fabric surface. The formulation, FeCl3 (0.2 M/L), Egyptol (0.2 g/L), aniline (0.2 M/L), temperature (25°C) and 4 hrs treatment at pH 2 is the best for polymerization of aniline on the surface of the fabric to produce conductive and antimicrobial fabrics.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
479
492
https://ejchem.journals.ekb.eg/article_7322_93fc9593ce96a3df7a4406398c6dac5e.pdf
dx.doi.org/10.21608/ejchem.2018.3011.1255
Microwave and Nanotechnology Advanced Solutions to Improve Ecofriendly Cotton's Coloration and Performance Properties
Tarek
Abou Elmaaty
textile printing, dyeing & finishing/Faculty od Applied arts/Damietta Univ
author
Eman
Abdelaziz
Benha University
department of textile printing, dyeing and finishing
author
Dalia
Nasser
instructor
department of textile printing, dyeing and finishing
author
Khaled
Abdelfattah
Department of Agricultural Chemistry, Faculty of Agriculture, Damietta University, Egypt.
author
Sherif
Elkadi
Department of Agricultural Microbiology, Faculty of Agriculture, Damietta University, Egypt.
author
Khaled
El-Nagar
National Institute for standards
author
text
article
2018
eng
This research aims to utilize microwave energy and nano technology to improve the printability and performance of cotton prints via screen printing technique. Each cotton sample was individually pre-treated by microwave power ranged from 300 to 700 watts and for a period ranged from 1 to 9 min. Afterwards the optimum sample was printed by printing paste containing Remazol™ reactive dye and silver nanoparticles (Ag-NPs) with different concentrations. The printed samples were fixed using microwave energy then were subjected to steaming or thermo-fixation. The obtained results clarified that, the prints obtained using microwave and Ag-NPs were found to have better color strength, fastness properties, antibacterial behavior and surface morphology when they were compared to the conventional techniques using thermo-fixation and steaming.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
493
502
https://ejchem.journals.ekb.eg/article_7323_70cbaad0f7a86727c4610e2459bd5504.pdf
dx.doi.org/10.21608/ejchem.2018.2927.1270
Preparation of Sulfated Zirconia Catalyst Loaded by Copper in Nano-scale Green Application to Synthesis of Biolubricant
Amina
Ibrahim
Processes Development, Egyptian Petroleum Research Institute, Cairo, Egypt.
author
Hussein
Al-Shafey
Egyptian Petroleum Research Institute, Cairo, Egypt.
author
Doaa
El-Desouki
Process Development, Egyptian Petroleum Research Institute, Cairo, Egypt.
author
Samira
Abdel-Azim
Process Development, Egyptian Petroleum Research Institute, Cairo, Egypt.
author
Noha
Aboul-Gheit
Process Development, Egyptian Petroleum Research Institute, Cairo, Egypt
author
text
article
2018
eng
This study investigates the activity of copper-doped catalysts supported on sulfated zirconia (SZ) for the esterification of Free Fatty Acid (FFA). Three catalysts SZ, Cu/SZ (sol) and Cu/SZ (imp) were prepared. The loaded catalysts contain 10% Cu supported on sulfated zirconia (Cu/SZ) were prepared by wet impregnation and sol-gel methods. The catalysts were characterized by X-ray diffraction, NH3 Temperature Programmed Desorption, N2 adsorption, Fourier transform infrared spectroscopy, and imaged by scanning electron microscopy. The XRD analysis showed that, the loading of Cu in the zirconia structure has stabilized the tetragonal zirconia phase, which is the most active phase. Also, the formation of (CuO-ZrO) composite has been proved. The TPD illustrated that the incorporation of Cu ions in the lattice of zirconia via sol-gel technique has lowered the acidity of the catalyst much more than impregnation technique. As a green application, different concentrations of the prepared catalysts were used for preparation of biolubricants by direct esterification of FFAs. The Cu/SZ/ (sol) catalyst has the highest activity. The percentage yields of synthesized biolubricants reached 99.8% when 0.3 % from the selected catalyst was utilized. Pour point, Flash point, Viscosity index, Apparent Viscosity and Percentage yield values of synthetic ester oils were evaluated.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
503
516
https://ejchem.journals.ekb.eg/article_7325_885cf0aeb19f21402deeca73a3ea8605.pdf
dx.doi.org/10.21608/ejchem.2018.3044.1267
Effect of Chemical Oxidation on the Adsorption Properties of Cationic Dye on Activated Carbons Prepared from Locally Atropa belladonna
Wafaa
Rashwan
National Research Centre
Physical Chemistry Department, Faculty of Science, Cairo University
author
Thoria
El-Nabarawy
Physical chemistry department, inorganic chemical industries division
author
Reham
Aboelenin
National Research Centre
author
Nady
Fathy
Physical Chemistry, Inorganic chemical industries division, National Research Centre,
author
text
article
2018
eng
This study investigates the influence of wet chemical oxidation using nitric acid and ammonium persulfate on the surface nature and the adsorption properties of activated carbon prepared from sulfuric acid activation of locally Atropa belladonna plant at 200oC. The surface properties of produced carbons (AC-S, AC-S/N and AC-S/A, respectively) were demonstrated by FTIR, potentiometric titration and N2 adsorption. The adsorption properties of these carbons were estimated using methyl green (MG) dye as a cationic dye. The effect of variables including pH, initial dye concentration and contact time on the adsorption properties of these carbons was studied. Acidic carbon adsorbents were obtained with large content of acidic surface functional groups in the sequence order AC-S<AC-S/N<AC-S/A as confirmed by FTIR and potentiometric plots. It was assessed that a large number of basic functional groups were generated after oxidation with ammonium persulfate (AC-S/N) and hence led to a decrease in its adsorption capacity towards MG dye. High adsorption capacities were found to be 100, 200 and 125 mg/g from MG dye onto AC-S, AC-S/N and AC-S/A, respectively. The adsorption results show that the adsorption was pH dependent with a high adsorption at pH of 6 which is obviously pH of dye solution. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and FlorryHuggins isotherm models. Pseudo-second-order kinetic model and Langmuir isotherm model showed better fit to the adsorption of MG dye onto the prepared carbons. Overall, this study reveals that the obtained carbons from Atropa belladonna are effective adsorbents in removing dyes from wastewater sources. Finally, the results also suggest that oxidation treatment with nitric acid is more efficient than ammonium persulfate to produce high acidic carbon adsorbents.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
517
530
https://ejchem.journals.ekb.eg/article_7324_09a505607bd773eef954ccac345c855a.pdf
dx.doi.org/10.21608/ejchem.2018.2954.1259
Construction of Mn0.5Mg0.5Fe2O4 Nano Particles
Nasrallah
Deraz
Physical Chemistry, National Research Centre, Dokki Cairo, Egypt
author
text
article
2018
eng
Mixed ferrite containing certain amounts of magnesium, manganese and ferric cations was prepared using a simple method. The as prepared ferrite was characterized X-ray diffraction (XRD), Scanning electron micrographs (SEM) infrared (IR) spectroscopy and Energy dispersive X-ray (EDX) techniques. These techniques revealed that the employed preparation method led to formation of a single phase of nano crystalline Mn0.5Mg0.5Fe2O4 powder which belongs to spinel structure. However, the structural and morphological properties of the as synthesized ferrite were determined. The magnetic properties of the obtained ferrite were investigated using VSM technique. In addition, the results revealed that the surface area of Mn0.5Mg0.5Fe2O4 was greater than that of both MnFe2O4 and MgFe2O4.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
531
538
https://ejchem.journals.ekb.eg/article_7326_e4a35d3daac3c97c1b851edfc4ddd905.pdf
dx.doi.org/10.21608/ejchem.2018.3112.1262
N-Aminophthalimide as a Synthon for Heterocyclic Schiff bases: Efficient Utilization as Corrosion Inhibitors of Mild Steel in 0.5 mol.L-1 H2SO4 Solution
Mohamed M.
Abdelaal
Tabbin Institute for Metallurgical Studies, P.O. Box 109 Helwan 11421, Cairo, Egypt.
author
Saad
Mohamed
Tabbin Institute for Metallurgical Studies, P.O. Box 109 Helwan 11421, Cairo, Egypt.
author
Yosry.F.
Barakat
Tabbin Institute for Metallurgical Studies, P.O. Box 109 Helwan 11421, Cairo, Egypt.
author
Hamed A. Y.
Derbala
Chemistry Department, Faculty of Science, Ain Shams University, Abbasiya, Cairo, Egypt, 11566.
author
Hamdy H.
Hassan
Chemistry Department, Faculty of Science, Ain Shams University, Abbasiya, Cairo, Egypt, 11566.
author
Wail
Al Zoubi
School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
author
text
article
2018
eng
Many Schiff bases were prepared to inhibit the corrosion reactions of mild steel in acidic medium. Their chemical structures were determined by using different techniques. Thermodynamic adsorption parameters of inhibitors were determined using the Langmuir adsorption isotherm. The presence of iodide ions in the medium increased the efficiency of these inhibitors. AC impedance spectroscopy was used to determine the polarization resistance. The scanning electron microscopy (SEM) showed the corrosion products decreased after using these inhibitors. The results show that the planer inhibitor is more effective than rich-electron one because it covers the whole surface. In addition, the mechanism of these inhibitors depends on decreasing the anodic and cathodic current.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
539
558
https://ejchem.journals.ekb.eg/article_7314_b4829f4e838f484a944ecf5248800397.pdf
dx.doi.org/10.21608/ejchem.2018.2414.1198
Electrical and Dielectric Properties of Stitched Non-woven Engineered Fabrics Containing Activated Carbon Fiber
Mohamed
Saad
National Research Centre, Textile Research Division, Dokki, Giza, Egypt, P.O.B.12622
author
Mohamed
Nasr
synthetic fibers, National Research Center, Cairo, egypt
author
Hazem
Yassen
Faculty of Education, Helwan University, Cairo, Egypt
author
Gamal
Turky
Microwave Physics and Dielectrics Dept., Physics Division, National Research Center, Cairo, Egypt.
author
text
article
2018
eng
Smart textile is considered to be a new trend that can revolutionize the functionality of clothing. One of the most promising fields of smart textiles is in energy storage devices. Recently, many research efforts focus on supercapacitor as an energy storage device that can overlap the gap between conventional batteries and traditional capacitors. Activated carbon fiber (ACF) is one of the important candidate for this application. Different groups of non-woven polyester fabrics were prepared with and without adding the activated carbons. The effect of structure of the samples on the permittivity, dielectric loss as well as the ac-conductivity is investigated and interpreted. The mechanism of the storage of the charge carriers is given by two different capacities. The first one is the capacity of the electric double layer at the interface between the electrode and the dielectric material. The second is the capacity due to the redox or what is called pseudo capacity. In this work, the broadband dielectric spectrometer, BDS, is employed to study the effect of frequency in the range of 1mHz – 10 MHz and sometimes temperature (20 – 60 oC). The non-woven samples prepared with ACF showed the best results among the prepared nonwoven samples without activated carbon fibers and even nonwoven samples with carbon granules. This is due to the good electrical conductivity of activated carbon fiber used in the nonwoven samples.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
61
v.
3
no.
2018
559
568
https://ejchem.journals.ekb.eg/article_7328_49783fb3a94509c1672074d6f599b874.pdf
dx.doi.org/10.21608/ejchem.2018.3298.1278