National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Synthesis, Reactions, and Antimicrobial Activity of N-Hydroxy-triacetonamine Derivatives
1359
1366
EN
Mahmoud
N. M.
Yousif
Department of Photochemistry, National Research Centre, Cairo, Egypt
mahmoud_nabil18@yahoo.com
Ahmed
A.
Fayed
Photochemistry Depatment, National Research Centre, Cairo, Egypt.
aasalfayed2008@yahoo.com
Nabil
N
Yousif
Photochemistry Department, National Research Centre, Egypt
profnabil_2013@yahoo.com
10.21608/ejchem.2019.7103.1586
Simple and one step method for preparation of N-hydroxy-2,2,6,6-tetramethyl-4-piperidone is reported. N-Hydroxy-2,2,6,6-tetramethyl-4-piperidone (1) reacts with formaldehyde, formaldehyde and piperidine to afford compounds (3) and (4) respectively. Compound (1) reacts with sodium azide and α-bromosugar to afford corresponding products. Compound (1) reacts with 2-(4-chlorobenzylidene)malononitrile to afford 1,6-napthyridine derivative (9). N-Hydroxy-2,2,6,6-tetramethyl-4-piperidone (1) reacts with p-chlorobenzaldehyde and cyanoacetamide to produce 1,6-napthyridine derivative (10a). N-Hydroxy derivative (1) reacts also with p-chlorobenzaldehyde and ethylcyanoacetate to afford 1,6-napthyridine (10b). Antimicrobial screening of some of the synthesized compounds has been performed.
2,6,6-Tetramethyl-4-piperidone,triacetonamine,N-hydroxy-triacetonamine,Formaldehyde
https://ejchem.journals.ekb.eg/article_28325.html
https://ejchem.journals.ekb.eg/article_28325_aaa973f9fee4fadfd6770e6d8a62dd39.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Effect of Friction Stir Welding Process Parameters and Post-Weld Heat Treatment on the Corrosion Behaviour of AA6061-O Aluminum Alloys
1367
1375
EN
Mostafa
Eldeeb
Department of Manufacturing Engineering and Production Technology, Modern Academy for Engineering and Technology, Cairo Egypt.
engmostafaeldeeb@yahoo.com
Lobna
Khorshed
0000-0002-4672-3234
Physical Chemistry Department, National Research Centre, Dokki, Cairo, Egypt.
lobnakhorshed@yahoo.com
Sayed
Abdallah
Mechanical Engineering Department, Faculty of Engineering - Shoubra, Benha University, Cairo, Egypt
sayed.abdelwanis@yahoo.com
Ahmed
Gaafer
Mechanical Engineering Department, Faculty of Engineering - Shoubra, Benha University, Cairo, Egypt
gaaferahmed@yahoo.com
Tamer
Mahmoud
Mechanical Engineering Department, Faculty of Engineering - Shoubra, Benha University, Cairo, Egypt
tsmaz2000@yahoo.com
10.21608/ejchem.2019.7946.1624
The aim of the present work is to study the effect of rotation and welding speeds as well as the T4 and T6 post-weld heat treatments (PWHT) on the corrosion behavior of AA6061-O aluminum plates joined using friction stir welding (FSW). The corrosion properties of welded joints were studied by Potentiodynamic polarization and Immersion tests. The results showed that both T4 and T6 PWHT improves the corrosion resistance of stirred zones compared to base alloy. However, joints of T4 showed lower corrosion resistance compared to T6. Increasing welding speed or reducing rotation speed increased the corrosion resistance of joints.
Friction Stir Welding,AA6061 aluminum alloy,Immersion test,Potentiodynamic polarization test
https://ejchem.journals.ekb.eg/article_28683.html
https://ejchem.journals.ekb.eg/article_28683_e29a50b74bbe182051dd372f8cd67c47.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Microwave Assisted Peptide Synthesis of Some Rationally Designed Cell Penetrating Peptides from C-Kit Receptor
1377
1389
EN
Shaimaa
Osman
Peptide Chemistry Department, Chemical Industries Research Division, National Research Centre, Cairo, Egypt.
shaima.mahdy@gmail.com
Sarah
Jones
Research Institute in Healthcare Science, School of Applied Sciences, University of Wolverhampton, Wolverhampton, UK
s.jones80@wlv.ac.uk
Mohamed
Zewail
Peptide Chemistry Department, Chemical Industries Division, National Research Centre, Cairo, Egypt
zewail40@gmail.com
Abdelgawad
Rabie
Chemistry Department, Faculty of science, Ain Shams University, Cairo, Egypt
mohamedabdelgawad@hotmail.com
Ahmed
Shalaby
Peptide Chemistry Department, Chemical Industries Research Division, National Research Centre, Cairo, Egypt
ahshalaby45@gmail.com
John
Howl
Research Institute in Healthcare Science, School of Applied Sciences, University of Wolverhampton, Wolverhampton, UK.
jh.howl@wlv.ac.uk
10.21608/ejchem.2019.7119.1611
In the interest of public health, cell-penetrating peptides (CPPs) have proven to be important way for the highly efficient intracellular delivery of bioactive cargos like peptides, proteins, and oligonucliotides. It is feasible to combine one or multiple CPPs with bioactive cargos either by direct chemical conjugation or, more rarely, as non-covalent complexes. The term bioportides was introduced to describe monomeric CPPs that are intrinsically bioactive. One of the consistent problems that may compromise the in vivo applications of CPPs and bioportides, is the stimulation of mast cell (MC) secretion. Therefore, in this study two decapeptides, S6 and S6P, has been designed from the c-kit protein, a mast cells receptor, and synthesized using the technology of microwave assisted solid phase peptide synthesis. In an attempt to find bioportides from the c-Kit protein, and studying their structure- activity relationship, the present work was carried out, investigating the effect of the presence of the phosphotyrosine moiety as an active site in the synthesized peptides.
Microwave assisted solid phase peptide synthesis,Cell-penetrating peptide,Bioportides,C-Kit receptor
https://ejchem.journals.ekb.eg/article_28326.html
https://ejchem.journals.ekb.eg/article_28326_f669e745d1325ddc44a89c6a3679444d.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Physical Distinguishable of Heterogeneous Overlapping Resulting from Stamp-pad and Laser Printing Inks
1391
1412
EN
Samia
Ibrahim
Shraa
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
samiashara2012@yahoo.com
Abdel Aleem
Solyman
Abo Elmagd
Al-Azhar University, Chemistry Department, Nasr City, Cairo, Egypt
dr.aleem@yahoo.com
Yasser
Mohamed
Moustafa
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
ymoustafa12@yahoo.com
Al-Sayed
Aly
Bakr
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
als_water@yahoo.com
Ahmad
Shabana
Al-Azhar University, Chemistry Department, Nasr City, Cairo, Egypt
shabana_12346@yahoo.com
Ibrahim
Mohamed
Abd El-Aziz
Forgery & Counterfeiting Department, Forensic Medicine Authority, Cairo, Egypt
ibrahimexpert_78@yahoo.com
10.21608/ejchem.2019.7319.1596
Detecting the arrangement of intersecting stamp-pad ink and toner laser printing strokes is an excellent method of examining the documents originality. In this study, different six brands of stamp-pad inks, five laser printers of various brand and model, three types of paper surface, two kinds of seal materials and three methods of seal manufactures were utilized to produce the samples of heterogeneous intersecting strokes. A combination of the microscopic method as a digital microscope and analytical instrumental technique as Raman spectroscopy were performed to determine the arrangement of intersecting strokes. The digital microscope succeeds in detection the arrangement of intersecting strokes of some stamp-pad ink and fails in detection the others depending on their brands and colors through notation four physical properties at intersection point the specular reflection, the ink and toner gloss, gaps and spreading. The Raman spectroscopy determined the ink or toner stamped or printed later by comparison the spectra of pure ink, toner and their intersections and succeeds in detection all samples through the spectral data such as peak location and peak intensity. The combination of a digital microscope and Raman spectroscopy which applied here successfully discriminates the arrangement of intersecting strokes of toner and all brands of stamp-pad inks regardless of their brands and color.
Forensic discrimination,Strokes intersection,Stamp-pad inks,Toner laser printer, Seal inks
https://ejchem.journals.ekb.eg/article_28843.html
https://ejchem.journals.ekb.eg/article_28843_5b7907d8c0ee549485759766ac8a8267.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Shear Properties of Apparel Fabrics Using Different Spun Yarns
1413
1418
EN
Ahmed
Ramadan
Damietta University
Faculty of applied arts
en_a.r5050@hotmail.com
Mohamed
Ezzat
Abo Hayes
National Research Centre
mezzat2012@gmail.com
10.21608/ejchem.2019.6875.1577
The shear properties of a fabric determine its performance properties as well as the appearances where it is subjected to a wide variety of complex deformations during usage as apparel. In This paper, woven fabrics have been made of cotton spun yarns with three different spinning techniques (ring spun, open-end spun and compact ring spun yarns) in weft direction. Some twill based weave structures were manufactured on the weaving machine with varying the weft density level. The Kawabata Evaluation System were used to measure the shear properties; shear rigidity, shear hysteresis at 0.5 deg. shear angle and shear hysteresis at 5 deg. shear angle. A statistical analysis was performed to get the effect of decided parameters on shear. A highly significant effect of the weave structures and weft density on the measured shear properties were found, while the type of weft yarns has insignificant effect. A multiple linear regression equations were derived to get a mathematical relationship between the influencing parameters; (the float length, yarn diameter, and weft density) and the shear properties. The derived regression equations had high correlation coefficients values.
woven fabric,shear angle,spinning techniques,weave structure,apparel fabrics,Kawabata Evaluation System,Regression Analysis
https://ejchem.journals.ekb.eg/article_27794.html
https://ejchem.journals.ekb.eg/article_27794_e5c2dc141c9e79eb51c634f8809dad1d.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Facile Synthesis of Textile-Based Filter for Industrial Wastewater Treatment
1419
1426
EN
Heba
Gamal
Home Economy Department, Faculty of Specific Education, Alexandria University, Alexandria, Egypt
ardhan2007@yahoo.com
Nour
Attia
Chemistry Division, National Institute of Standards
drnour2005@yahoo.com
10.21608/ejchem.2019.6638.1558
In this study, cotton and polyester textile fabrics have been treated with polyaniline layer to use as smart filter for industrial wastewater treatment. The developed filters were effective to anchor the dissolved dye wastewater molecules. The polymerization of polyaniline chains on textile fabrics was assured by microscopic techniques. Also, the electrical resistance of treated samples was significantly reduced recording 20 and 40 kΩ for cotton and polyester-PANI filter respectively. The textile-based filter was tuned to be selective to negative dye molecules dissolved in water. The mass ratio of dissolved dyes was varied with developed filter and achieved 45% removal efficiency. The developed textile-based filter was characterized using various spectroscopic and microscopic techniques. The concentration of waste dyes molecules before and after treatments was determined and efficiency of filter was evaluated.
Wastewater,Textile fabrics,Polyaniline,Filter,Textile filters
https://ejchem.journals.ekb.eg/article_27447.html
https://ejchem.journals.ekb.eg/article_27447_b9968d140451d2794cf1129bd4812a81.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Synthesis, Antimicrobial Activity and Quantum Calculations of Novel Sulphonamide Derivatives
1427
1440
EN
Asmaa
Fahim
0000-0002-0293-3491
Green Chemistry Department, National Research Centre, 33 El Bohouth St. (former El Tahrir St.), Dokki, P.O. 12622.
asmaamahmoud8521@hotmail.com
Eman
Ismael
2Department of Organometallic and Organometalloid Chemistry, National Research Centre, 33 El Bohouth St. (former El Tahrir St.), Dokki, P.O. 12622.
emanhamed125@yahoo.com
10.21608/ejchem.2019.6870.1575
The reactivity of 2-bromo-N-(phenylsulfonyl)acetamide derivatives 3a-c towards some nitrogen-based nucleophiles was studied in this investigation and gave the corresponding aminothiazole 6a-c, amino-oxazole 7a-c, quinazoline-2-yl 10a-c; respectively. Furthermore, the reaction of acetamide derivatives 3a-c with aminopyridine gave pyridine-4-ylamino 12a-c. Reaction of acetamide derivatives 3a-c with benzo-2-thiol derivatives afforded benzo [d] thiazol-2-ylthio 14a-c and 1H-benzo[d]imidazol-2-yl)thio derivatives 16a-c; respectively. The synthesized compounds displayed good antimicrobial activity. Additionally, compounds 12a and 14a exhibited high activity towards most of the strains. The computational calculations for 12a and 14a were carried out via HF/6-31G(d) and DFT B3LYP/6-31G(d) basis sets and the corresponding results of HOMO–LUMO energy gap and Mulliken atomic charges were tabulated. This correlation between experimental and theoretical calculations provided a good confirmation for anticipated new compounds.
Sulfonamide derivatives,antimicrobial activity,Computational study
https://ejchem.journals.ekb.eg/article_27448.html
https://ejchem.journals.ekb.eg/article_27448_1a92e9ee0c0abc3a3dd8e9ddde48d200.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Hydrazone Analogues: Molecular Modeling, Synthesis, In- vivo Anti-Nociceptive Activity and in-vitro Antimicrobial Activity
1441
1450
EN
Jebastin Sonia Jas
M
Research and development Centre, Bharathiar University, Coimbatore, 641046 India
msoniajas@gmail.com
Marimuthu
G
Swami Dayananda College of arts and Science,Manjakkudi, Thiruvarur, Tamilnadu, India- 612610.
gmarimuuthu@gmail.com
B.
Prithivirajan
Research and development Centre, Bharathiar University, Coimbatore, 641046 India
10.21608/ejchem.2019.6248.1524
The inevitable consequence of the widespread use of antimicrobial agents has been the emergence of antibiotic resistant pathogens, functioning an ever- increasing used for new drugs. In an effort to develop antimicrobial agents a series of hydrazones derivative (4a-e) were synthesized from chalcones. Substituted hydrazides were reacted with chalcone in the presence of acetic acid and hydrazone derivatives were synthesized. The synthesized hydrazones were characterized on the basis physical and spectroscopic data and were evaluated for their antimicrobial activity against various bacterial and fungal strains using disc diffusion method using nutrient agar media. In addition, the antinociceptive activities of the products were evaluated. Our data showed that many derivatives have promising activities as antinocicepative agents.Furthermore the assessment of structural similarity of the target compounds with various standard drugs was done. Evaluation of the compounds revealed remarkable antibacterial, antifungal and antioxidant activity. In addition, an in silico docking study was performed in order to explain the possible interactions and the docking scores of all the compounds into the crystal structure of DNA Gyrase (Pdb code : 3U2D) using Online docking server program.
Chalcone,hydrazone,docking,DNA Gyrase,Anrtomicrobial activity,antinocicepative
https://ejchem.journals.ekb.eg/article_27687.html
https://ejchem.journals.ekb.eg/article_27687_ac739ad18921501a46c1d57d7e9e37c0.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Ultrasound One Pot Synthesis of Fused Quinazolinones and Quinazolinediones, Screening and Molecular Docking Study as Phosphodiesterase 7A Inhibitors
1451
1466
EN
sherin
Elfeky
0000-0002-5774-8007
Department of Pharmaceutical organic chemistry, Faculty of Pharmacy, Mansoura University,Egypy
sherin_el_feky@yahoo.com
Tariq
Sobahi
king abdulaziz university, Jeddah, faculty of science
drtariq_s@hotmail.com
Magdy
M
Gineinah
king abdulaziz university, Jeddah, faculty of Pharmacy
maggineinah@yahoo.com
Nesreen
S
Ahmed
0000-0001-9136-9986
Department of Medicinal Chemistry, National Research Center, Cairo, Egypt
nesreen69eg@yahoo.com
10.21608/ejchem.2019.7130.1587
Phosphodiesterase 7A enzyme is one the most recent targets for designing potent anti-inflammatory agents with minimal side effects. Quinazolinones are unique building blocks of wide biological activities. Different Quinazolinones were reported to act as Phosphodiesterase 7A inhibitors anti-inflammatory particularly against choronic inflammation and autoimmune disease. Ultrasound is a green convenient method for synthesis of different heterocyclic ring system that is advantageous in terms of yield and reaction time. Ultrasound was used for one pot synthesis of 3-substituted 6-aryl-dihydroisoindolo[2,1-a]quinazoline-5,11-diones and 3-Aryl quinazoline-2,4(1H,3H)-diones. Seventeen compounds were synthesized in good yields. The synthesized compounds were inspected for in vitro inhibitory activity against phosphodiesterase7A enzyme. Molecular docking was used to study the mode of interaction of all the synthesized compounds into the enzyme phosphodiesterase 7A binding site. Five compounds showed high inhibitory activity of enzyme Phosphodiesterase 7A at micro-molar level compared to reference drug. The compounds showed good recognition at the enzyme binding site in the molecular docking. There was a good agreement between the molecular docking and the biological screening results.
Docking study,Phosphodiesterase 7A inhibitory assay,In vitro screening,Quinazolinedione,Dihydroisoindoloquinazolinone
https://ejchem.journals.ekb.eg/article_27688.html
https://ejchem.journals.ekb.eg/article_27688_93a6b246ef61d40ce3d6751fd216985c.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Effect of Magnetic Treatment of Potable Water in Looped and Dead End Water Networks
1467
1481
EN
Emad
El-Kashef
Mechanical Design and Production Department, Faculty of Engineering, Cairo University, Giza, Egypt.
Ashraf
M
El-Shamy
0000-0003-3672-509X
Physical chemistry department
elshamy10@yahoo.com
Ahmed
Abdo
Electrical Power Department, Faculty of Engineering, Cairo University, Giza, Egypt.
Elshafie A. M.
Gad
Egyptian Petroleum Research Institute, 1 Ahmed El-Zomor Street-El-Zohour Region Nasr city -11727, Cairo, Egypt.
Amr A.
Gado
Oroba Engineering Consultant Center, Mourad Bey St. 35, Al Orouba St., Heliopolis, Cairo, Egypt.
10.21608/ejchem.2019.7268.1595
Potable water was exposed to permanent magnetic field (PMF) with a magnetic flux density (B=1.45 T ± 0.05) to investigate its effect on some water parameters for different time intervals at open and closed flow conditions at flow rate of 41.93 L/min and 52.16 L/min , respectively. Such as these parameters are; electrical conductivity (EC), total dissolved solids (TDS), pH and temperature. In the existence of this permanent magnetic field, so these pervious parameters were also studied as a function of water flow rate in case of the open loop system. The results showed that the PMF fluctuates the tested parameters of the outflow of this potable water at the previous flow conditions. These effects are owing to the hydrogen bond network. Theoretical approach of calculating inter-molecular interaction energy of H-bonded systems of water clusters under the effect of magnetic field is performed using DFT (Density Functional Theory) level with B3LYP function on Gaussian 09 Program.
TDS,EC,Flow rate,Permanent magnetic field,potable water
https://ejchem.journals.ekb.eg/article_27689.html
https://ejchem.journals.ekb.eg/article_27689_1a2796c383e24195dcabad353f4cbc39.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Biophysical Properties of Polymethyl Methacrylate Blended with Maleated Castor Oil Filled with Calcium Carbonates in the Micro and Nano Scales
1483
1498
EN
Mona
Saied
National Research Center
m_amin2212@yahoo.com
Azza
Ward
0000-0003-0094-213X
National research center
azzaward@hotmail.com
Azima
Saad
national research center
azimasaad@yahoo.com
Kamal
Nasr
national research center
abdelnorkn@yahoo.com
Hamdeya
Zayed
Girls College for Art, Science and Education, Ain Shams University,
hamdeia.ahmed@yahoo.com
10.21608/ejchem.2019.6110.1557
The biophysical properties of films prepared from polymethyl methacrylate (PMMA) blended with maleated castor oil (COMA) with composition 70/30 wt% filled with different concentrations of calcium carbonate (CaCO<sub>3</sub>) in the micro and nano scales have been studied. The incorporation of the filler in the polymeric matrix exhibits remarkable improvement in its properties. The prepared films were characterized through different techniques such as, thermo gravimetric analysis TGA, scanning electron microscope SEM, differential scanning calorimetry DSC, in addition to dielectric properties which were carried out at range of frequency from 0.1 Hz to 5 MHz and temperature range from 30 to 90<sup> o</sup>C. The data obtained for the two investigated systems indicate that the dielectric permittivity ε' and dielectric loss ε" increased by increasing either the concentration of the filler or the temperature. The analysis of the imaginary part of the electric modulus M" which was carried out using Havriliak-Negami function revealed three relaxation times characterizing the conductivity relaxation, segmental molecular motion and the local motion of the side groups attached to the main polymer chain. The slight decrease in such relaxations noticed above 60<sup>o</sup>C (Tg) could be attributed to the cooperative reorientation motion of the polymeric segments, while that happened at concentration above 30 wt % from the micro and above 10 wt % from the nano filler could be attributed to the retardation of the dipole matrix which become weak.This result is supported by the calculations of the activation energies carried out using Arrhenius equation.The electrical conductivity σ were studied over frequency range (0.1Hz to 5 MHz) indicated that COMA is recommended to be used for electrostatic dissipation applications. Moreover the enzymatic degradation was carried out by immersing the prepared films in phosphate buffer solution. The weight remaining was found to decrease with the increase in either the time of immersing or the concentration of the filler added.
Biophysical,Castor oil,Dielectric permittivity,Electrical conductivity σ,Enzymatic degradation
https://ejchem.journals.ekb.eg/article_28187.html
https://ejchem.journals.ekb.eg/article_28187_a3fb3afde0b89110f6313d21a0ef7295.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Removal Comparative Study for Cd(II) Ions from Polluted Solutions by Adsorption and Coagulation Techniques Using Moringa Oleifera Seeds
1499
1517
EN
A. A.
Swelam
Faculty of Science, Physical Chemistry Dept. Al Azhar University, Egypt.
abdelsamihswelam@yahoo.com
sheref
saied
Medicinal and Aromatic Dept. Horti. Res. Institute, A. R. C., Egypt.
sherif_saied_saleh@yahoo.com
Ahmed
hafez
Faculty of Science, Physical Chemistry Dept. Al Azhar University, Egypt.
a7med_el3med@yahoo.com
10.21608/ejchem.2019.6801.1568
The Moringa oleifera seed (MOS) was characterized by pHzpc, Fourier transform infrared spectroscopy (FT-IR), X-ray and scanning electron microscopy (SEM) in order to get an insight of the surface charge, functional groups, and morphology of the biosorbent, respectively. The MOS studies were conducted on Cd (II) with different parameters, such as solution pH, contact time, initial concentration of the pollutant and temperature were examined. Experimental results revealed an increase of the removal percentage of Cd (II) using adsorption compared with coagulation technique with increases of the initial Cd (II) concentration and contact time. However, an opposite trend was observed with an increase of the solution temperature and solution pHs value. The Freundlich isotherm linear equation are better described for the adsorption process and coagulation process for the removal of Cd (II) ions. By Comparing the thermodynamic parameters of Cd (II) removal, such as ∆H, ∆S and ∆G, distinct behaviours were observed, where adsorption process is positive values along all temperatures while coagulation process showed negative values (with exception of -∆G at 277 K). According to S* value, the adsorbent system are very high while the coagulation system are very low<br /> Keywords; Moringa Oleifera seeds, Cd (II), Adsorption, Thermodynamics.
Keywords,Moringa Oleifera seeds, Cd (II), Adsorption, Thermodynamics
https://ejchem.journals.ekb.eg/article_28473.html
https://ejchem.journals.ekb.eg/article_28473_1009e610d8f129c19d96c5304ef32287.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Spectroscopic Investigation of Para-Methyl and Para-Methoxy Maleanilinic Acids in Comparison with Thermal Analyses and Theoretical Calculations and Evaluation of Cytotoxicity Against Carcinoma Cells
1519
1536
EN
mohamed
A.
Zayed
0000-0003-2425-6329
Department of chemistry, Faculty of Science, Cairo University (D.Sc. Anal.Chem.)
mazayed429@yahoo.com
Mohamed
El-Desawy
Nuclear Physics Department, Nuclear Research center, AEA, 13759-Cairo, Egypt
desawy619@yahoo.com
AZZA
Eladly
Science and Technology Center of Excellence, Military production , M P P, P.O.Box 3066, Elsalam II, Cairo, Egypt
aza_82@yahoo.com
10.21608/ejchem.2019.7353.1597
Two novel N-maleanilinic acid derivatives (I-II) namely (E) – oxo -4- ((4- methyl phenyl) amino)-4- oxobut-2-enoic acid (p-MMA) and (E) -4- ((4- methoxy phenyl) amino)-4- oxobut -2- enoic acid (p-MOMA) were prepared by solvent free reaction between maleic anhydride and a p- methyl and p-methoxy aniline derivatives in a good yield. These compounds were synthesized and investigated using elemental analyses, FT-IR and thermal analyses under argon atmosphere. The crystallographic structures of studied compounds were investigated by X-ray diffraction (XRD). The molecular structures of the titled compounds in the ground state were optimized by DFT/B3LYP and HF methods with 6-311G++ (d,p) basis set. Calculations were carried out by GAUSSIAN 09 suite of programs. Natural bond orbitals (NBO) analysis and frontier molecular orbitals were performed using NBO 3.1 program implemented in the Gaussian 09 package are presented at the same level of theory. Thesis results were tabulated. This research aims chiefly to correlate between the structures of these investigated derivatives using experimental techniques in comparison with the theoretical molecular orbital (MO) calculated parameters. This correlation between experimental and theoretical calculations provided a good confirmation of the proposed structures of the newly prepared compounds. The derivatives were found to be highly effective against Hepatocellular carcinoma cells > Breast carcinoma cells > colon carcinoma cells. It was recognized, that cancer cells over expression promotes tumorigenic functions; were suppressed by p-MMA > p-MOMA inhibitors.
N-maleanilinic acids,spectroscopy (FT-IR),thermal analyses,XRD,DFT calculations,biological activity against Carcinoma cells
https://ejchem.journals.ekb.eg/article_28474.html
https://ejchem.journals.ekb.eg/article_28474_739891cb60198e5e3f4c88d0ddc8ac89.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Removal of Phosphate Ions from Wastewater by Treated Hydrogel Based on Chitosan
1537
1549
EN
Ghada
Mahmoud
0000-0001-8335-7766
National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt.
ghadancrrt@yahoo.com
Mohamed
Abdel Khalek
Central Metallurgical Research and Development Institute,
kalekma@yahoo.com
Eman
Shoukry
Faculty of Science, Al-Azhar University
eman_shoukry2002@yahoo.com
Mona
Amin
Faculty of Science, Al-Azhar University, Nasr City, Cairo 11371, Egypt
nemo131998@gmail.com
Aya
Abdulghany
Faculty of Science, Al-Azhar University, Nasr City, Cairo 11371, Egypt
ayahussien32@gmail.com
10.21608/ejchem.2019.9627.1646
Chitosan/ Gelatin/2-(Dimethylamino) ethyl methacrylate (Cs/Gltn/PDMAEMA) hydrogel was synthesized by gamma irradiation for the expulsion of phosphate ions from wastewater. Chemical adjustment of the hydrogel with thiourea was performed to introduce thiol groups Cs/Gltn/PDMAEMA-treated. More over trapping of SiO2 into the hydrogel matrix to acquire Cs/Gltn/PDMAEMA/SiO2 composite. It was found that the gelation increases with increasing PDMAEMA content in the hydrogel. The maximum gelation performed at an equal ratio of Cs/Gltn at a radiation dose of 15 kGy. The adsorption capacities of the prepared systems towards phosphate ions were investigated. It was obtained that the maximum removal is achieved at pH 6 through 180 min. However, the removal percent decreases with increasing phosphate ions concentration and temperature. The ability of the prepared adsorbents towards phosphate ions removal are ascending ordered in the sequence of Cs/Gltn/PDMAEMA hydrogel, Cs/Gltn/PDMAEMA-treated , and Cs/Gltn/PDMAEMA/SiO2 composite. The pseudo-second-order equation fits well the adsorption kinetics. The adsorption isotherm follows the Freundlich model higher than the Langmuir model
Adsorption,Composite,Hydrogel,phosphate removal,watertreatment,Chitosan,Gamma Irradiation
https://ejchem.journals.ekb.eg/article_28584.html
https://ejchem.journals.ekb.eg/article_28584_d517486c21aa7131e5b3077ba470121d.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
8
2019
08
01
Solvent Extraction Techniques of Lipid from Algal Species in Wastewater Treatment Station
1551
1562
EN
Esraa
Alaa
Ahmed
Environmental Sciences and Industrial Development Department, Faculty of Postgraduate studies for Advanced Sciences, Beni-Suef University, Egypt
esraa58.mansour@yahoo.com
Sana
Abo Elenin
Professor in Chemical Engineering & Pilot Plant Dept. National Research Center, Egypt
sanaa_enin@outlook.com
Asmaa
hamouda
0000-0002-1991-2347
Environmental Sciences and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt
asmaa_hamouda@yahoo.com
Hamada
Mahamoud
Zoology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
mhmada@aucegypt.edu
10.21608/ejchem.2019.7862.1618
Biodiesel production process relies of various key steps one of which is the lipid extraction from microalgae cells using economic techniques. In this study, Algal community structure and physicochemical parameters of the wastewater treatment plant (Beni-Suef, Egypt), are determined from March 2016 to February 2017. In this study, we focused on the lipid extracted from wild mixed culture of Chlorella sp. which is the dominant from December 2016 to February 2017. Lipid content and fatty acid profiling of Chlorella sp. are investigated using three different methods (1) conventional extraction (CE), (2) ultrasonic assisted extraction (UAE) and (3) microwave assisted solvothermal extraction (MASE). MASE showed the highest lipid yield of 37.9±0.13%. SEM micrographs showed that MASE had the most distributive effect for algae cells compared to UAE and CE. Six different solvents are tested for MASE technique namely hexane: isopropanol (3:2), hexane: ethanol (1:1), chloroform: methanol (1:1), diethyl ether, ethanol and methanol. A strong linear relation between the direct electric constant and yield percent is obtained with methanol showing the highest yield. The GC-analysis of extracted lipids shows that methanol resulted in the highest percentage of palmitic acid (45.5%). The chemical composition of extracted lipids shows promise towards further conversion to biodiesel.
solvent extraction,Lipids recovery,wastewater treatment plant,saturated fatty acid,Solvent polarity,GC analysis
https://ejchem.journals.ekb.eg/article_28755.html
https://ejchem.journals.ekb.eg/article_28755_b93cd92f05b40bf146089ad75e143417.pdf