@article { author = {Mandal, Sudip Kumar and Das, Agnidipta and Dey, Suddhasattya and Sahoo, Ujjwal and Bose, Sankhadip and Bose, Anindya and Dhiman, Neerupma and Madan, Swati and Ramadan, Mohamed A.}, title = {Bioactivities of Allicin and Related Organosulfur Compounds from Garlic: Overview of the Literature Since 2010}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {1-11}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.15787.1954}, abstract = {The medical values of garlic, a traditionally used allium vegetable, were recognized as early as 3000 BC. Allicin, one of the major organosulfur compounds present in garlic, is associated with a wide variety of benificial activities like anticancer, anti-inflammatory, antiarthritic, antimicrobial, anti-diabetic, cholesterol-lowering, the potential to lower cardiovascular disorders, ameliorating neuron functions, etc. In this article, we have reviewed biological activities of allicin and related organosulfur compounds since the year 2010, using various scientific websites like Pub med, Google Scholar, Science Direct etc. Our literature review has highlighted many organo sulphur components of garlic and their possible mechanisms in curing different diseases. The information provided in this review will provide strategies for efficient organosulfur-based treatments of several diseases in future. Further research efforts are needed for a clear understanding of the interconnection between these functional components and various chronic diseases.}, keywords = {Allicin,Organosulfur compounds,Garlic,Pharmacology,Clinical trials}, url = {https://ejchem.journals.ekb.eg/article_45269.html}, eprint = {https://ejchem.journals.ekb.eg/article_45269_a0fc454e59e926a05afcd58e2a7d7779.pdf} } @article { author = {Banerjee, Sabyasachi and Bose, Sankhadip and Mandal, Subhash C and Dawn, Subhojit and Sahoo, Ujjwal and A. Ramadan, Mohmmed and Mandal, Sudip Kumar}, title = {Pharmacological Property of Pentacyclic Triterpenoids}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {13-35}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.16055.1975}, abstract = {Plant terpenoids are utilized generally for their aromatic behaviour. They act as conventional herbal remedies and are under research for antineoplastic activity, antibacterial activity, anti-diabetic activity, anti-inflammatory activity, anti-platelet aggregate activity, antiviral activity, antioxidative activity, antiallergic, antihypertensive activity and additional pharmaceutical actions. Plants not only just deposit terpenes for herbariums defence yet in addition emanate essential mixtures in response to herbivory and numerous different abiotic and biotic stresses. Now a day, there is a phenomenal developing enthusiasm for natural triterpenes over the most recent couple of decades because of the revelation of their potential biological and pharmacological activities. Pentacyclic triterpenes are ancillary plant elements broadly spread in stem, leaves, bark and fruit peel. Specifically, the ursane, lupane and oleanane pentacyclic triterpenes show different pharmacological impact. Subsequently, these triterpenes are offering key components for the improvement of novel multi-targeted bioactive agents.}, keywords = {Pentacyclic triterpenes,antidiabetic activity,antiviral activity,Antibacterial activity}, url = {https://ejchem.journals.ekb.eg/article_48663.html}, eprint = {https://ejchem.journals.ekb.eg/article_48663_015ef68fe09f484f5d20885c1c57a159.pdf} } @article { author = {El-Awady, M.H. and El-Ghetany, H.H. and Aboelghait, K.M. and Dahaba, A.A.}, title = {Zero Liquid Discharge and Recycling of Paper Mill Industrial Wastewater via Chemical Treatment and Solar Energy in Egypt}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {37-45}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.13949.1866}, abstract = {Integrated treatment for recycling of industrial wastewater has become an urgent necessity at the present time. Zero Liquid Discharge (ZLD) in combination with solar energy become urgently needed not only to compensate water shortage but also to preserve the recent water resources from pollution. In this work where the waste-paper was collected to be recycled; an integrated system has been applied for wastewater treatment to reuse in process, while the rest is being comply with the regulatory standards to be discharged from the paper factory. Treatment including a lot of coagulants such as alum, ferric chloride, lime and cationic polymer these coagulant used separate or combined .The removal efficiencies of Chemical Oxygen demand (COD) were 84%, 83.5%, 75% and 79.4%, respectively. Consequently Total Suspended Solids (TSS) removal efficiencies were 99.5%, 99.6%, 97.5% and 98.9%. All treated industrial wastewater can be recycled to fulfill the phenomenon of ZLD. On the other hand, the negative impact of produced chemical sludge was diminished via non-conventional technique as a clean post treatment, where an effective design of a solar dryer was used to obtain dry sludge cake and to collect a highly purified water to be recycled in industrial process. Solar energy showed good potential in drying the sludge paper with competitive cost and clean environment. It is found that each square meter of drying surface area can dry 9 kg of wetted sludge paper per day. The presented trapezoidal shape solar dryer can dry daily up to 540 kg of wetted sludge paper. Based on the required sludge paper water demand, a large scale solar dryer can be sized accordingly.}, keywords = {Paper Industry,Wastewater treatment,chemical treatment,solar dryer}, url = {https://ejchem.journals.ekb.eg/article_43467.html}, eprint = {https://ejchem.journals.ekb.eg/article_43467_68fc9940a2883a0d603aaa27cfecbd99.pdf} } @article { author = {Abdel-Razek, Adel and Shehata, Mohamed and Badr, Ahmed and Gromadzka, Karolina and Stępień, Lukasz}, title = {The Effect of Chemical Composition of Wild Opuntia Ficus Indica Byproducts on its Nutritional Quality, Antioxidant and Antifungal Efficacy}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {47-61}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.15895.1967}, abstract = {Wild Opuntia ficus-indica is a plant commonly grown in the desert. This study aimed to evaluate the chemical composition; fatty acids, macro and micro-elements, vitamin C, total phenolic and flavonoid contents of Opuntia Ficus indica byproducts (cladodes and fruit peels) on its nutritional quality, as well as, their antimicrobial, and antioxidant efficacy. Dietary fiber was 30.68 ± 5.28 in peels and 25.65 ± 3.07 in cladodes. The total phenolic content for each byproduct was estimated as 520±2.64 and 788±1.35 mg GAE/g for fruit peels and cladodes, respectively. Whereas flavonoids were estimated as 65.7±3.41 and 25.36 ± 1.55 mg Cat., /g for fruit peels and cladodes respectively. Results reflected considerable content of microelements and omega fatty acids. Eicosadionic was the major fatty acid component and it recorded 32.1 and 38.4% for fruit peel and cladodes, respectively. Byproducts extract demonstrated an efficiency against bacteria and toxigenic fungi. Inhibition impact of byproducts was very clear on Fusarium fungi using diffusion assay on agar media. The unique chemical composition and distinctive minor components of cladodes and peels reflected distinguishing bioactivity against harmful food-microorganisms. This could benefit for food safety particularly against toxigenic fungi. It could be concluded that Opuntia Ficus indica byproducts are promising for the application in the food industry}, keywords = {Opuntia ficus indica byproducts,Chemical composition,nutritional components, antifungal activity,Antioxidant activity}, url = {https://ejchem.journals.ekb.eg/article_48392.html}, eprint = {https://ejchem.journals.ekb.eg/article_48392_eba95e3c61d04e4078f6b029b04028c3.pdf} } @article { author = {Nasr, Fayza and Abdelfattah, Ibrahim and Shana, Abdelrahman}, title = {Natural Gas Processing Wastewater Management}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {63-73}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.12230.1763}, abstract = {The aim of this research is to focus on adequate treatment technology for handling wastewater discharged from natural gas processing industries. An Egyptian natural gas company located at Alexandria was selected for the study. The study represents a useful reference for treatment of such kind of wastewater. Dark Fenton, biological treatment and the combination of them were carried out. The wastewater produced by subject industries has high concentration of chemical oxygen demand, (COD=52665 mg/L), low biological oxygen demand (BOD=8350 mg/L) and low total suspended solids (TSS=370 mg/L). The value of BOD/COD was low (0.16) which indicates that this wastewater inhibits the metabolic activity of bacterial seed because of their refractory properties causing biodegradability to be difficult. Fenton oxidation treatment raise the BOD/COD to more than 0.36. Biological treatment using both aerobic and anaerobic bioreactors for the treatment of mixture of Fenton pretreated gas processing wastewater and sewage gave satisfactory results. The subsequent anaerobic treatment using UASB reactor at optimum HRT [18h] qualifies the produced wastewater for discharge into the sewerage system. The additional aerobic treatment using the continuous-flow activated sludge at 12h HRT qualifies the treated wastewater for discharge into the sea.}, keywords = {Refractory,industrial,Wastewater,Treatment,Safe discharge}, url = {https://ejchem.journals.ekb.eg/article_35316.html}, eprint = {https://ejchem.journals.ekb.eg/article_35316_b433141874599b2fb6821b1da60f85dd.pdf} } @article { author = {Essa, Dalia and Ibrahim, Saher and El-Nagare, Khaled and Medhat, Ahmed and Nassar, Adel}, title = {Characterization and Evaluation of Polyester and Silk Fabrics Treated Using Plasma as Clean Energy Advanced Technique}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {75-90}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.17566.2084}, abstract = {In this article we studied the effect of surface modification of polyester (PET) and silk fabrics by their exposure to cold plasma. The cold plasma was carried out using oxygen as a working gas and different plasma device parameters have been studied such as: different time, different current and different hydrostatic pressure using plasma/Oxygen. Treated fabrics are characterized by the measurements and evaluation of mechanical properties, air permeability, Electron Spin Resonance (ESR) and the changes in surface morphological of pretreated fabrics were characterized by Scanning Electron Microscope (SEM) and Energy Dispersive X- Ray Analysis (EDX)). The nano-silver particles were prepared by green synthesis method, then were characterized by Transmission Electron Microscopy (TEM) and Zeta Potential and particle size. The exposed plasma fabrics at optimum conditions were modified with the prepared nano-silver. The antibacterial activity properties for treated fabrics against gram positive bacteria (Staphylococcus aurous) and gram negative bacteria (Escherichia coli) were examined. The SEM results confirmed that there was a significant increase in roughness of the surface for all treated fabrics . The results of mechanical properties showed that plasma treatment had not destructive effect on the physical properties of the fabrics. The results obtained clarify that the ultraviolet protection factor (UPF) values increase for polyester exposed fabrics but the increase is not significant for silk fabrics while antibacterial properties were highly improved by all treated fabrics.}, keywords = {oxygen DC plasma discharge,polyester,Silk,mechanical properties, ESR, TEM, Antibacterial properties}, url = {https://ejchem.journals.ekb.eg/article_60221.html}, eprint = {https://ejchem.journals.ekb.eg/article_60221_e338066fcbf9505c471baddc87390e26.pdf} } @article { author = {Hami, Hawraa and Abbas, Ruba and Abdullwahid Jasim, Ala&#039;a and Abdul Abass, Dhifaf A. and Abed, Marwa A. and Maryoosh, Asma A.}, title = {Kinetics Study of Removal Doxycycline Drug from Aqueous Solution Using Aluminum Oxide Surface}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {91-101}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.5499.1483}, abstract = {The batch adsorption of doxycycline from aqueous solution using aluminum oxide under different experimental conditions was investigated in this study. The effect of initial concentration, sample volume, contact time and pH ‎ have been reported. A comparison of kinetic models applied to the adsorption of doxycycline on the adsorbents was evaluated for the pseudo first-order, the pseudo-second-order, Elovich, Fractional power and intra particle diffusion kinetic models were utilized to the adsorption data in respect of investigating the kinetic process; kinetic data were best fitted to the pseudo-second-order model validated by normalized standard deviation (NSD), average relative error (ARE) and chi-square test (Chi-X2). The result suggested that the intra particle diffusion was one of the rate-limiting steps.}, keywords = {Kinetics,Doxycycline,Adsorption,aluminum oxide}, url = {https://ejchem.journals.ekb.eg/article_37219.html}, eprint = {https://ejchem.journals.ekb.eg/article_37219_213032acf859cec6dd8a78d330c07665.pdf} } @article { author = {Hassan, Mohamed I. and Hassane, Abdallah M. A.}, title = {Synthesis, Characterization and in vitro Antibacterial evaluation of New Oxindoles and Spiro-Oxindoles Derivatives}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {103-113}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.14725.1907}, abstract = {Arylidenes oxindole 3 and 5 were synthesized via the reactions of isatin 1 with malononitrile dimmer 2 and 5-amino-3-(cyanomethyl)-1H-pyrazole-4-carbonitrile 4. Compound 3 react by Michael addition with malononitrile, ethyl 2-cyanoacetate and acetyl acetone to give 6'-amino-2'-(dicyanomethylene)-2-oxo-2',3'-dihydro-1'H-spiro[indoline-3,4'-pyridine]-3',5'-dicarbonitrile 6a, 2'-(dicyanomethylene) 2,6'-dioxospiro[indoline-3,4'-piperidine]-3',5'-dicarbonitrile 6b and 2-(5'-acetyl-3'-cyano-6'-methyl-2-oxo-1'H-spiro[indoline-3,4'-pyridin]-2'(3'H) ylidene) malononitrile 7, respectively. compound 3 also, reacted with dimethylformamide dimethyl acetal to give N,N-dimethyl-N'-(1,1,3-tricyano-3-((Z)-2-oxoindolin-3-ylidene)prop-1-en-2-yl)formimidamide 7 which cyclized by ammonium acetate to give 4-amino-6-(cyano(2-oxoindolin-3-ylidene)methyl)pyrimidine-5-carbonitrile 8. Compound 5 reacted with dimedone 10 and acetyl acetone to give 3-(cyano(2-oxoindolin-3-ylidene)methyl)-5-((5,5-dimethyl-3-oxocyclohex-1-en-1-yl)amino)-1H-pyrazole-4-carbonitrile 11 and 2-(cyano(2-oxoindolin-3-ylidene)methyl)-5,7dimethylpyrazolo[1,5-a]pyrimidine-3-carbonitrile 12. Moreover, compound 3 and 5 reacted with hydrazine to give 3,3'-(hydrazine-1,2-diylidene)bis(indolin-2-one) 15. The antibacterial activities of the synthesized compounds were evaluated.}, keywords = {Isatin,malononitrile dimmer,Arylidenes oxindole,spiro-oxindole,Antibacterial}, url = {https://ejchem.journals.ekb.eg/article_53680.html}, eprint = {https://ejchem.journals.ekb.eg/article_53680_afd10e04172084901268e6841fa3275a.pdf} } @article { author = {Hegazy, Aiat}, title = {High Performance Crystalline TiO2 Mesocrystals for Enhanced Solar Fuel}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {115-122}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.13610.1841}, abstract = {Titanium dioxide (TiO2) is one of the most abundant compounds in our planet. It is cheap, non- toxic, highly chemically and thermally stable semiconductor material. Titanium dioxide nanoparticles (TiO2-NPs) show high visible light transparency combined with high UV light absorption. However, altering the particle size and crystalline structure of TiO2-NPs influences the absorption range, adsorption of dye molecules and electron transfer rate at the surface. Unfortunately, TiO2-NPs suffer high electron/hole recombination rates. Therefore, an ordered superstructure consisting of nanoparticles on the scale of nanometers to several micrometers is proposed titanium dioxide mesocrystals (TiO2-MCs). In this work, we represent a new and facile way to fabricate TiO2-MCs with spherical structure by sol-gel method. We were able to fabricate spherical TiO2-NCs with narrow size distribution by controlling the hydrolysis conditions. The effect of air annealing on the morphology, size shrinkage, and phase transition of the nanoparticles was studied by scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. Also, the fabricated TiO2-MCs showed exceptional photoactivity compared to their Degussa p-25 nanoparticles counterparts upon their use in water splitting cells.}, keywords = {water splitting,solar fuel,TiO2 anatse,Nanomaterials,mesocrystals}, url = {https://ejchem.journals.ekb.eg/article_35312.html}, eprint = {https://ejchem.journals.ekb.eg/article_35312_78d15f8e9a2b277eb369ac9dcad5fab3.pdf} } @article { author = {Omer, Ahmed and Ammar, Y and Mohamed, Gamil and Abd elbaky, Yasser and Tamer, Tamer}, title = {Preparation of Isatin/chitosan Schiff Base as Novel Antibacterial Biomaterials}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {123-131}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.7766.1614}, abstract = {The research on biopolymers and its derivatives has received much attention from the researchers toward preparing a novel material. The biopolymers and its derivatives have broad applications due to its biodegradability, nontoxicity and biocompatibility. The present study aimed to develop and characterizes a unique chitosan Schiff base by coupling chitosan with isatin under acidic conditions to form isatin/chitosan Schiff base. The changing in chitosan chemical structure was proved by FT-IR, electronic spectra. The physico-chemical study shows a decrease of samples water uptake and solubility in aqueous acidic solution by increased isatin content as a result of an increase in hydrophobicity character of chitosan by modification. Antibacterial activity was tested against four different bacterial strains one gram-positive: (Staphylococcus aureus) and three gram negative (Pseudomonas aeruginosa, Salmonella and Proteus vulgaris). The results showed increases in the antibacterial activity of substituted chitosan against both gram-negative and gram-positive bacteria by the rise in isatin content.}, keywords = {Chitosan,Isatin,Schiff base,Antibacterial activity}, url = {https://ejchem.journals.ekb.eg/article_37217.html}, eprint = {https://ejchem.journals.ekb.eg/article_37217_0aba2d085965c067a80e3babef01cb4d.pdf} } @article { author = {Hanna, Adly and Khorshed, Lobna and El-Beih, Ahmed and Sherief, Marwa and El Khashen, Amany and El-Bassyouni, Gehan}, title = {Synthesis, Bioactivity, and Antimicrobial Studies on Zinc Oxide Incorporated Into Nanohydroxyapatite}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {133-143}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.12988.1812}, abstract = {Nano-particles of hydroxyapatite (HA) were prepared by simple method. The dried prepared particles were mixed with different percentages of zinc oxide (ZnO, 25, 50 and 75% wt. %). The produced samples were characterized by IR and X-ray techniques, where the morphologies of the samples were examined by SEM, TEM and EDAX. The results indicate that the pure HA is formed in nano particles (<100nm) and have hexagonal structure. By adding different percentages of ZnO, the particles exhibit a decrease in their size and improve the crystallinity of the parent HA. Before studying the bioactivity, the prepared samples were immersed in simulated body fluid (SBF) solution for 14 and 45 days. The characterization of the samples after immersion indicates that there are no change in the structure and the phases, while there are changes in the Ca/P ratio. The behavior of the pure HA and the mixed samples towards gram-positive bacterium(Staphylococcus aureus ATCC 29213), gram-negative bacterium (Escherichia coli ATCC 25922), yeast (Candida albicans NRRL-Y477) and (Aspergillus niger NRC53) fungus indicated that the addition of the ZnO increase the resistance of samples against bacteria and fungi.}, keywords = {Synthesis,Characterization,Antimicrobial,Bioactivity,Hydroxyapatite,Zinc Oxide}, url = {https://ejchem.journals.ekb.eg/article_34833.html}, eprint = {https://ejchem.journals.ekb.eg/article_34833_43cff679a70fe9034e2f5f6b3e388e10.pdf} } @article { author = {Abdelsalaam, Hayam and Zayed, Ehab M. and Zayed, M. A. and Nouman, Mahmoud}, title = {Synthesis, structural characterization, thermal behaviour and antimicrobial activity of copper, cadmium and zinc chelates of traizole-thiole ligand in comparison with theoretical molecular orbital calculations}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {145-163}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.16723.2015}, abstract = {This research involved structural and molecular behaviour of the ligand HL, 4-amino-5-(2,2-dichloro-1-methylcyclopropyl)-4H-1,2,4-triazole-3-thiol toward the transition metal ions namely Cu (II), Cd(II) and Zn (II) had been studied using elemental analyses, magnetic, electronic, FT- IR, 1H-NMR, XRD and Thermal analyses (TGA and DTA). The interpretation of practical data obtained had been evaluated and confirmed by theoretical molecular modelling. The computations had been done by software of Gaussian 09W package. The geometries of traizole-thiole ligand and its metal chelates were fully optimized using density functional theory B3LYP method. There are no symmetry constrains had been applied during geometry optimization. (DFT)/GENECP level by implementing Def2TZVP basis set was used for Cu, Cd and Zn-atoms; and basis set 6-311++G (d, p) was used for other atoms. The mixed basis set had been selected due to its flexibility. HOMO and LUMO energy values for chelates, chemical hardness and electronegativity had been calculated. NBO calculations had been done at the same level using (NBO 3.1) program involved in the software of Gaussian 09W for measuring the intra-molecular delocalization in systems under investigation qualitatively. TD-DFT approximation at the same level of theory was used to calculate the electronic absorption spectra of the studied chelates. Their structures were confirmed via correlation between experimental and theoretical calculations. The ligand and its metal chelates biological activities had been tested against Gram-positive (Staphylococcus aureus ATTC 12600), Gram-negative (Escherichia coli ATTC 11775 and) bacteria, two fungus (Aspergillus flavus and Candida albicans).. These biological activities are tested and give the order Zn-HL˃ Cd-HL˃ Cu-HL ˃˃ HL as a general trend in relation to transition metal cation present in chelate entity. This trend is also correlated to theoretical calculations of chelates electronegativity (X), polarizability and HOMO and LUMO values. Also this trend is correlated to theoretical calculations of energy gap values eV (Zn- HL = 5.19, Cd-HL = 4.32 and Cu-HL = 2.08) and in reverse order to electronegativity (X) values. The variation of electronegativity (X) values is supported by electrostatic potential, for any two molecules, where electron will be partially transferred from one of low X to that of high X. The results show that the order of decreasing X (increasing CT within the molecules) is: Cu-HL > Cd-HL > Zn-HL >> HL. Some of them have the order of magnitude effect like standard Amoxicillin.}, keywords = {Traizole-Thiole,Metal-Chelates,Thermal- Spectroscopic Analyses,XRD,Molecular Orbital Calculations,Biological Activity}, url = {https://ejchem.journals.ekb.eg/article_53226.html}, eprint = {https://ejchem.journals.ekb.eg/article_53226_a69b43eca83fe03f4fda79f44e59209e.pdf} } @article { author = {Rabie, E. M. and Assaf, H. F. and Shamroukh, A.A. and Khodari, M.}, title = {Fabrication of a New Electrochemical Sensor Based on Carbon Paste Electrode Modified by Silica gel/ MWCNTs for the Voltammetric Determination of Salicylic Acid in Tomato}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {165-175}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.17087.2048}, abstract = {Herein, a fabrication and application of a novel sensor of carbon paste electrode modified by silica gel/MWCNTs for the determination of salicylic acid (SA) by different voltammetric techniques such as Linear Sweep, Cyclic and Square Wave Voltammetry. The electrochemical behavior of SA has been investigated and the optimum experimental conditions such as the effect of supporting electrolyte, pH and scan rate on the anodic peak of SA was determined. Square Wave Voltammetry (SWV) was employed to determine SA, where the important parameters such as frequency were achieved. Moreover, the results showed that modified electrode exhibited excellent electrocatalytic activity towards the oxidation of SA. The results showed irreversible process with one oxidation peak of SA at the surface of modified electrode and the overpotential of SA decreased significantly compared with that at the bare carbon paste electrode (CPE). This electrochemical sensor shows an excellent performance for detecting SA with a detection limit and limit of quantification were 0.9 × 10-9 M and 2.99 × 10-9 M respectively. In addition, the peak currents increased linearly in the concentration range of 3.0–70 nM. The results showed also, the fabricated sensor was successfully applied to the detection of SA in tomato with good recovery ranging from 96.60 to 103%, Moreover, the proposed electrode revealed good reproducibility and stability, with standard deviation (S.D.) 2.3% for eight successive measurements of SA.}, keywords = {Salicylic acid,Silica gel,carbon nanotubes,Carbon paste electrode,Cyclic voltammetry,Square wave voltammetry}, url = {https://ejchem.journals.ekb.eg/article_62610.html}, eprint = {https://ejchem.journals.ekb.eg/article_62610_08857764d2a880f922daf1ce940ad62d.pdf} } @article { author = {Hassouna, Mohamed and Amin, Ragab Riyadh and Ahmed-Anwar, Alaa Ahmed and Mahmoud, Rehab Khaled}, title = {Efficient Removal of Oxytetracycline and Some Heavy Metals from Aqueous Solutions by Mg-Al Layered Double Hydroxide Nanomaterial}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {177-195}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.6102.1510}, abstract = {Mg–Al LDH nanoparticles with nitrate intercalated anions, as an adsorbent, was prepared through coprecipitation technique of solutions of magnesium nitrate hexahydrates and aluminum nitrate (with percentage 3:1 molar ratio respectively). The nanomaterial was characterized before and after adsorption of some pollutants in wastewater by XRD, FT-IR, BET surface area, zeta potential, FESEM and HRTEM. The adsorption capability of the adsorbent was studied with regard to several pollutants in wastewater like (copper, zinc, iron, cobalt, nickel metal ions and oxytetracycline) in single solution. Various factors such as pH (3-10), dose of Mg-Al LDH ( 0.025-0.2g), concentration of metal ions (15-60 ppm) and effect of shaking time (5-120 min) were applied to optimize the removal ability of Mg-Al LDH. The adsorption efficiency of the pollutant by Mg-Al LDH was calculated, the kinetics and the isotherm of adsorption strength over the adsorbent were further studied.}, keywords = {: Mg–Al LDH nanoparticles,Adsorption removal,Heavy metals,Oxytetracycline}, url = {https://ejchem.journals.ekb.eg/article_34844.html}, eprint = {https://ejchem.journals.ekb.eg/article_34844_924ec37f282ff8c4aaa0cdbe0ed309a5.pdf} } @article { author = {El-Sakka, Sahar and Soliman, Mohamed and El-Sholkany, Eman}, title = {Synthesis, Cytotoxicity and Molecular Docking of Some Schiff Bases Derived Quinazolinone Bearing Pyrazoline}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {197-209}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.10116.1666}, abstract = {A novel quinazolinone derivatives based on 3-amino-2-[3-(4-methoxy-3-methylphenyl)-4,5-dihydro-1H-pyrazol-5-yl]-4(3H)-qunazolinones were designed, synthesized and evaluated for their in vitro cytotoxic activity against the hepatic carcinoma cell line (HepG-2), the results revealed that the tested compounds process inhibitory effects on the growth of HepG2 liver cancer cells. 3-amino-2-[3-(4-methoxy-3-methylphenyl)-4,5-dihydro-1H-pyrazol-5-yl]-4(3H)-quinazolinone showed the highest inhibition activity against HepG2 cell line (IC50 equals 67.8 µg/ml) among the tested compounds. The molecular modelling studies were performed to explore the detailed binding affinity towards the human liver carcinoma HepG2. The obtained results proved that the most active 3-amino-2-[3-(4-methoxy-3-methylphenyl)-4,5-dihydro-1H-pyrazol-5-yl]-4(3H)-quinazolinone could be useful as a template for future design, adaptation and investigation to construct more active qunazolinone analogs. Moreover, compounds were screened for antibacterial activity and none of them showed noteworthy activity.}, keywords = {Quinazolinone,HePG2,Schiff base,Molecular docking,Azomethines}, url = {https://ejchem.journals.ekb.eg/article_37221.html}, eprint = {https://ejchem.journals.ekb.eg/article_37221_64eb13e651f58e13dd3eb5e980c139fb.pdf} } @article { author = {elhagrasi, Ali and Mahmoud, Ahlam and Foda, Doaa and Ibrahim, Noha and Yousef, Olfat}, title = {Secondary Metabolites and Biological Activities of Allium porrum L. in Attacking Ehrlich Ascites Carcinoma in Mice}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {211-227}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.20452.2228}, abstract = {The aim of the study is to investigate the phenolic compounds of methanol extract of Allium porrum L. Aerial parts (MEAP) and introducing the methanolic extract as a candidate for the treatment of cancer in vivo as well as exploring its anti-tumor mechanisms in attacking tumor cells at the molecular level. Isolation of phenolic and flavonoid compounds by column chromatography has been carried out, purified by sephadex LH-20 and their structures were established with the aid of spectroscopic metheods (UV, EI/MS, ESI/MS,1H-NMR and13C-NMR spectroscopy). Eleven phenolic and flavonoid compounds were isolated from the aerial parts of MEAP, and characterized as (quercetin-3-O-β-glucopyranoside-7-O-α-rhamnpyranoside, quercetin-3-O-α-rhamnopyranoside, quercetin-4’-O-β-glucopyranoside, kaempferol-3-O-β-glucopyranoside, kaempferol-7-O-β-glucopyranoside, quercetin, isorhamnetin, kaempferol, p-coumaric acid, ferulic acid and gallic acid. Forty five female Swiss albino mice were divided into five groups. One group represents the normal control. The four remaining groups were divided as follows: Two groups were injected with Ehrlich ascites carcinoma (EAC) cells intraperitonially the other two were injected intramuscularly (to form solid tumor) representing the positive non treated groups. One group from each model administrated orally the extract at a dose of 300mg/kg b. wt. three days weekly for twenty-one days after 24 hrs from the intraperitonial or intramuscular injection of EAC cells. The influence of the extract on the apoptotic proteins was tested in Ehrlich ascites carcinoma (EAC) cells and in solid tumor of the treated groups compared to the non-treated ones. The gene expression of caspase-3, Bax, Bcl-2 proteins and DNA fragmentation test were performed in the EAC cells. Hematological profile was conducted on mice's blood in addition to the immunohistochemical determination of P53 protein in solid tumors.}, keywords = {Allium porrum L. Ehrlich ascites- Cell apoptosis- Immunohistochemistry-Phenolic and flavanoid compounds}, url = {https://ejchem.journals.ekb.eg/article_65920.html}, eprint = {https://ejchem.journals.ekb.eg/article_65920_2402027241ce6a178f7f66a7c3d12fac.pdf} } @article { author = {El Rafie, Shadia Hanem and Shalaby, Marwa and Zaher, Fatma and Abuel Aila, Rania and Abdel-Halim, Tarek}, title = {Precipitation of Modified Nano Molecular Magnesium Oxide from Bittern and Ammonia}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {229-242}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2020.14178.1933}, abstract = {ABSTRACT Pilot scale magnesium hydroxide was precipitated by ammonia solution and concentrated bittern of 58 Mg2+ g/L . The effect of poly-ethylene glycol (600)PEG and ethylene glycol EG in crystalline size of Mg(OH)2 was investigated through X-ray diffraction(XRD). To confirm the presence of functional groups introduced by modifiers the samples were subjected to Fourier transforms infrared spectroscopy (FTIR). Morphology properties of the selected samples were characterized by SEM images and EDX analysis confirmed the low carbon content and high oxyen % in product with Poly ethylene glycol (PEG). Thermal Gravimetric Analysis (TGA) and (DSC) were used to investigate PEG different ratios effect on Mg(OH)2 crystallite and stability of product. The PEG 0.5% ratio addition shows the best sample properties in all analysis. Pure Nano- magnesium hydroxide was prepared by calcination at 500 ᵒC producing flower plates with XRD 2Ɵ= 38.16 ᵒ Key words: Bittern, Pilot chemical precipitation, PEG 600, Mg(OH)2, crystal structure.}, keywords = {Key words: Bittern,Pilot chemical precipitation,PEG 600,Mg(OH)2,crystal structure}, url = {https://ejchem.journals.ekb.eg/article_67292.html}, eprint = {https://ejchem.journals.ekb.eg/article_67292_3cea8c6fb4295ebe11597f258d6c4a80.pdf} } @article { author = {El Rafie, Shadia Hanem and El Ghetany, Hamdy and Abuel Aila, Rania and GABER, Marwa}, title = {Treatment and Purification of Phosphogypsum}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {243-250}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.13267.1934}, abstract = {Abstract Production of phosphoric acid and phosphate fertilizers are still generating pollution problem. The (PG) wasted phosphogypsum by product created through the manufacture consists of many valuable materials to be recovered. For each ton phosphoric acid produced, about 4 – 5 tons (PG) waste was generated. The (PG) waste is generally dumped near the production plants causing contamination of ground water, soil and large extensions of land were occupied by (PG) piles. The present work proposed recovery of (PG) waste after purification, while XRF was used to present its main constituents. Valuable materials such as calcium carbonate can be recovered for soil conditioning by sea water treatment. Sodium sulphate was prepared form (PG) purified too and detected by XRD. SEM and EDAX were used to compare between purified and (PG) waste. Solar thermal energy was used to calcine (PG) waste rocks and minimize electrical energy use successfully.}, keywords = {phosphogypsum,sodium sulphate,Calcium Carbonate,Purification,waste powder}, url = {https://ejchem.journals.ekb.eg/article_59813.html}, eprint = {https://ejchem.journals.ekb.eg/article_59813_845ff868f3e1b73009462e7ac05fbac5.pdf} } @article { author = {Darwish, Abdelfatah and Ghoniem, Ahmed and Hassaan, Mohamed Yousry and El-Said Shehata, Omnia and Turky, Gamal}, title = {Synthesis and Characterization of Polyaniline/Mn3O4/Reduced Graphene Oxide Nanocomposite}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {251-265}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.13194.1821}, abstract = {The present work is concerned with the synthesis and studying the electrical and dielectric properties of Polyaniline (PANI)/Mn3O4/Reduced Graphene Oxide (RGO) nanocomposites using the Broadband Dielectric Spectroscopy technique. Polyaniline/Mn3O4 and polyaniline/Mn3O4/RGO nanocomposites were prepared using in-situ polymerization. To investigate the structural and morphology of the prepared samples, XRD, FTIR, HRTEM and SEM techniques were used. XRD results of pure Mn3O4 and PANI showed that PANI has crystallinity to some extent and the formation of Mn3O4 as a major phase with crystallite size ~20 nm is obtained. In case of nanocomposite samples, PANI/Mn3O4 and PANI /Mn3O4/RGO revealed a slight disappearance of the characteristic peaks of Mn3O4, which may be attributed to the covering of Mn3O4 surface by PANI. FTIR analysis of the nanocomposite samples indicated that the characteristic absorption peaks are shifted to higher wavenumbers compared with that of pure PANI confirming the interaction between PANI, graphene and Mn3O4. The morphological study of the samples revealed a porous surface of micro aggregates of Mn3O4 and PANI enveloped by RGO sheets and showed the distribution of Mn3O4 nanoparticle and PANI nanofibers on and between the thin sheets of RGO. The value of dc conductivity is rather high, and the prepared nanocomposites could be considered as synthetic metals from the conductivity point of view of such plastic electrode materials.}, keywords = {Polyaniline,Manganese oxide,Reduced Graphene oxide,Nanocomposites,electrical conductivity}, url = {https://ejchem.journals.ekb.eg/article_35547.html}, eprint = {https://ejchem.journals.ekb.eg/article_35547_64341a3ebbd8d1f2e99972593c758b98.pdf} } @article { author = {Issa, yousry and Abdelfatah, Hussein and Allahgi, Mohamed}, title = {Spectrophotometric Determination of Benzethonium Chloride Using Some Chromotropic Acid Azo Dyes}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {267-279}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.13226.1828}, abstract = {Five simple, sensitive, rapid and accurate spectrophotometric methods were developed for the determination of benzethonium chloride in its pharmaceutical formulation. The proposed methods are based on ion-pairs formation of the drug with some chromotropic acid azo dyes such as arsenazo (I) (ARZO (I)), arsenazo (III) (ARZO (III)), SPADNS, chromotrope 2R (C2R) and chromotrope 2B (C2B) and subsequent extraction into methylene chloride. The extracts have maximum absorbance at 520, 540, 520, 530, and 520 nm respectively. The method of solvent extraction showed good sensitivity and wide linearity over a concentration range of 8.96-89.62, 4.48-44.81, 4.48-44.81, 4.48-44.81 and 8.96-89.62 µg/mL. Limits of detection 0.52, 1.07, 0.14, 0.62, and 0.77 µg/mL for ARZO (I), ARZO (III), SPADNS, C2R, and C2B, respectively. They were also used for the analysis of the antibacterial spray Dermoplast® with excellent recovery (95.88-102.45%) and relative standard deviation values (0.49-2.68%). The statistical analysis of the obtaine data was performed.}, keywords = {Benzethonium Chloride,Chromotropic Acid Azo Dyes, Spectrophotometric Analysis, Extraction}, url = {https://ejchem.journals.ekb.eg/article_55978.html}, eprint = {https://ejchem.journals.ekb.eg/article_55978_5cf717900e887b9409b3b92f2b47df5a.pdf} } @article { author = {Diab, M.A. and ElGammal, Maie I. and Ibrahim, M.S. and Mahmoud, Ghada A. and Sorour, S. and Rezoka, Sh.}, title = {Synthesis and Characteristic of CMC/AM/PAC Polymer for Natural Organic Matter and Trihalomethanes Removal from Water}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {279-291}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.11688.1744}, abstract = {A composite Hydrogel of carboxymethyl cellulose/acrylamide/powdered activated carbon (CMC/AM/PAC) were prepared by ɣ-irradiation and characterized by spectroscopic and electron microscopic techniques. The effect of monomer concentration on the percentage of composite hydrogel formation was studied. The composite hydrogel content reached the maximum gel percentage at radiation dose of 25 kGy, the formed composite was used for removal of natural organic matter (NOM) from raw water. The (NOM) uptake increased by increasing the pH of the medium until reached a maximum value at (pH5).The increase in contact time led to increase of the amount of (NOM) adsorbed until the equilibrium was reached within for (CMC/AM/PAC) composite Hydrogel.The optimum adsorbent dose of 0.4 g/L for (CMC/AM/PAC) composite Hydrogel. The potential applications of the newly sorbents is extraction (NOM) from real samples from raw water from Nile Rosetta branch. Also, Trihalomehanes (THM's) produced as disinfection by-products (DBPs) formed from the reaction between chlorine and (NOM) were removed using the composite Hydrogel by a 1 minute rapid mix stage at 150 rpm followed by a 20 min flocculation stage at 40 rpm and a 30 min settlement period. Also, it is noticed that the prepared composite Hydrogel has the ability to remove NOM up to 66.8%.}, keywords = {composite Hydrogel, Removal of natural organic matter (NOM),Trihalomthanes,Water treatment}, url = {https://ejchem.journals.ekb.eg/article_37213.html}, eprint = {https://ejchem.journals.ekb.eg/article_37213_1afde5f2ad3f0fcd0b5d77b6ec206601.pdf} } @article { author = {eldamarawy, yasser and assaad, faiz and Youssef, Refat and Mubarak, Dalia}, title = {Adsorption Thermodynamics of Cu- Ca Ion Exchange on Nano-montmorillonite Clay System}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {293-300}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.2477.2024}, abstract = {ABSTRACT The ion exchange reaction between Ca-montmorillonite in a Nano form and copper ions is studied by the potentiometric methods using a glass electrode specific for copper ion determination at three different temperatures (20, 30 and 40°C). Ca-Clay + Cu2+ ⇌ Cu- Clay + Ca2+ Enhancement of the copper on the nano-montmorillonite was recorded with increasing the Cu ion fraction in the solution. Increasing the reaction temperature had a negative effect on the concentration of Cu fraction on the solid phase.The isotherms results pointed out that adsorption of Cu2+ ions are preferred as indicated by the negatively charged free energy (ΔGo). The preference for the Cu2+ ions and their influence on the nano-montmorillonite as well as the high binding strength are elucidated by the negativity of the entropy (∆S◦) and ∆Sclay as well as the enthalpy (∆H◦) values. The adsorption reactions of Cu2+ onto the clay surfaces were exothermic in nature as indicated by the negative value of ∆H◦. The activity coefficient of the exchanged ions at different ionic fractions Ca:Cu in the solution are affected mainly by two factors included the distribution of the ions in the Gouy and Stern layers and the differences in the interlayer spacing according the solution composition.}, keywords = {KEY WORDS: Thermodynamic,ion exchange,copper,calcium,Nano- montmorillonite clay,Gibbs free energy,activity coefficient}, url = {https://ejchem.journals.ekb.eg/article_63657.html}, eprint = {https://ejchem.journals.ekb.eg/article_63657_775c88ca0aec5e60b8ad4b10f8e5e1e4.pdf} } @article { author = {Hamed, Said and Soliman, Tarek and Hassan, Laila and Abo-Elwafa, Ghada}, title = {Preparation of Functional Yogurt Fortified with Fish Oil-In-Water Nanoemulsion}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {301-314}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.18621.2149}, abstract = {Although being one of the richest sources of long-chain omega-3 fatty acids, its stringent odor, high susceptibility to oxidation and hydrophobicity make fish oil application in food formulae very restricted. The main objective of this study was to fortify yoghurt, with fish oil nanoemulsion to increase its nutritional benefits. Olive and orange oils, as well as α- tocopherol, were also used in the preparation of the nanoemulsion to enhance the oxidative stability and palatability of yoghurt. Whey protein isolate (WPI) was utilized in different concentrations as a more safer emulsifier. Different characteristics of the prepared nanoemulsion like droplet size, polydispersity index (PDI), zeta potential, turbidity, and physical parameters were assessed. The prepared nanoemulsion was then used to prepare yoghurt and its physicochemical and sensory attributes were examined. The oxidative stability of the incorporated fish oil was greatly improved as indicated by retention of polyunsaturated fatty acids (PUFA) content which was accounted to be 90.40 and 85.17 % for nanoemulsion fish oil (NFO) and plain fish oil (FFO) yoghurt samples respectively. Generally, Results indicated that yoghurt fortified with nanoemulsified fish-olive oils (NFO) gave closer characteristics to normal yoghurt and had better acceptability and sensory attributes than that fortified with plain fish-olive oils which let the door opened for more application of nanoemulsified fish oil in food formulations.}, keywords = {Functional yogurt,fish oil,whey protein isolate,nano-emulsion,ultra-high pressure homogenizer}, url = {https://ejchem.journals.ekb.eg/article_63656.html}, eprint = {https://ejchem.journals.ekb.eg/article_63656_a8f8153aa77b9eb15a6d2984165f8b60.pdf} } @article { author = {El-Sayed, Ahmed and El-Saidi, Manal and Khattab, Reham}, title = {Unexpected Reactions of Azido-p-Benzoquinone Derivatives Towards Lawesson’s Reagent and Molecular Docking Study as a Promising Anticancer Agent}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {315-326}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.17488.2074}, abstract = {Synthesis of 1,3,2-benzo-aza-phosphole derivatives (3b-c) by reaction of lawesson’s Reagent (LR) 1b with 2-azido-p-benzoquinonedibenzenesulfonimine (2b-c) has been intercepted. The reaction of 2-azido-p-quinonediimine 4 with Lawesson’s Reagent (LR) (1a) and/or (1b) gave the corresponding compounds 6a and 6b. On the other hand, when 2,5-diazido 5 reacted with LR (1b) has led to the formation of the benzenesulfonamide 10. The disphospha-5-indacene adduct has been synthesized by the reaction of LR 1c with 5. Mechanisms accounting for the formation of these compounds are provided. All the synthesized compounds have been subjected to docking study using AutoDock Vina software in order to gain insights to their binding modes against cyclin-dependent protein kinase 2 (CDK-2, PDB:1DI8), receptor protein B-cell lymphoma 2 (BCL-2, PDB:2O2F), and Janus kinase 2 (Jak2, PDB:5AEP) that are highly involved in cell cycle and in cell apoptosis. These targets have been selected based on their key roles in cancer progression via the regulation of the cell cycle and DNA replication. Molecular-docking analyses have revealed that compound 12 and 6b are the best docked ligand against all tested targets. As it is displays the lowest binding energy and critical hydrogen bonds and hydrophobic interactions with these proteins.}, keywords = {Azides,Lawesson’s reagent,Molecular docking,benzoazaphosphole derivatives,benzoquinone diimine derivatives}, url = {https://ejchem.journals.ekb.eg/article_60610.html}, eprint = {https://ejchem.journals.ekb.eg/article_60610_1618afe43eef28be1376f4062422a755.pdf} } @article { author = {Khalil, Safaa and El hotaby, Walid and Bassyouni, Gehan}, title = {Terahertz Pulsed Spectroscopy for Optical and Dielectric Properties of Demineralized Bone Matrix, Collagen and Hydroxyapatite}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {327-346}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.14201.1876}, abstract = {Demineralized bone matrix (DBM) has osteoinductive potential functioning in many biological applications such as three-dimensional scaffold which assist new bone and cartilage growth by enhanced bioavailability of growth factors. Terahertz pulsed spectroscopy (TPS) was applied to investigate the optical and dielectric properties of camel femoral and cranial DBM, collagen type I, synthetic and natural hydroxyapatite powder (HA) in the range of 0.06-3.5THz. Terahertz (THz) absorption, refractive index (R.I) and dielectric properties (εʹ and εʺ) were found to be intensely differentiated to control and demineralized bone. Results presented the THz absorption fingerprint of all studied materials. The natural HA revealed higher R.I, εʹ, and εʺ values than both synthetic HA and collagen. Cranial DBM exhibited higher R.I compared to the control in all frequency ranges, whereas the femoral DBM behavior was frequency dependent. Demineralization produced significant increase in the values of εʹ and εʺ. THz dielectric properties acted as a sensitive predictor to the composition and microstructure of bone in different biological applications. Amalgamation of Infrared Spectroscopy and THz spectroscopy together with TGA, ICP and EDX can offer deep insight into the sample properties.}, keywords = {Demineralized bone,collagen,Terahertz Spectroscopy,refractive index,Dielectric properties}, url = {https://ejchem.journals.ekb.eg/article_43919.html}, eprint = {https://ejchem.journals.ekb.eg/article_43919_be3dee57baac31335ba4db7c7aeedd17.pdf} } @article { author = {zahran, magdy and Mossad, Micheal and Elhalawany, Noha}, title = {Highly Dendritic Polythiophene/silver (PT/Ag) Nanocomposite for Solar Energy Applications}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {347-356}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.12782.1798}, abstract = {Polythiophene/Silver (PT/Ag) nanocomposite has been synthesized and characterized. Morphological studies have been made to elucidate the structure of the formed nanocomposite. The morphological studies revealed that the formed nancomposite is highly dendritic forming tree like structure. A bulk heterojunction solar cell (BHJSC) has been built using the prepared nanocomposite as photo active layer. The solar cell parameters such as open circuit voltage Voc, short circuit current Isc and fill factor FF have been determined via current- voltage I-V characteristic. The maximum power conversion efficiency (PCE) obtained from I-V characteristic was 14.2 % which is much higher than that obtained from other commercial polythiophene based solar cells (SC). The enhanced PCE was attributed to the superior highly dendritic structure of the formed nanocomposite which provides charge transfer (CT) pathways and facilitates separation of the formed excitons into free electrons and holes. As far as we know none of these characteristics have been reached before in the open literature for PT based solar cells.}, keywords = {Nanocomposite,charge transfer,bulk heterojunction solar cell and power conversion efficiency}, url = {https://ejchem.journals.ekb.eg/article_58192.html}, eprint = {https://ejchem.journals.ekb.eg/article_58192_47967a3ddd724e987adacd75b1a26862.pdf} } @article { author = {Ali, N.F. and El- Khatib, E.M. and EL-Mohamedy, R.S.R.}, title = {Improvement in Properties of Wool Fibers Pretreated with Chitosan and Nano- Chitosan and Dyed with Saffron Natural Dye}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {357-366}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.10157.1687}, abstract = {Wool fibers pretreated with chitosan and nano chitosan and dyed with saffron red and yellow mixture as natural dye by using microwave heating method. The effect of chitosan and nano chitosan concentrations on color strength (K/S) was measured. The results indicated that, wool fibers pretreated with chitosan and nano chitosan recorded higher color strength than the untreated fibers. Fastness properties and the color yield of the dye on wool fibers were evaluated. The results indicated that color fastness to rubbing, washing and perspiration of all dyed wool fibers are excellent to good. The morphologies structure of the untreated and pretreated wool fibers were examined by scanning electron microscopy (SEM). The untreated wool fibers have a rough surface. The pretreated wool fibers were swelling compared to the untreated fibers. The diameter of the fibers increased and has smooth and even surfaces. The changes in the surface morphology due to the effect of pretreatment with chitosan and nanochitosan.The antimicrobial activity with some species of bacteria and fungi were tested. The results indicated that the pretreated fibers exhibit higher reduction percent than the untreated fibers.}, keywords = {Chitosan,nano chitosan,Natural Dye,saffron red and yellow mixture}, url = {https://ejchem.journals.ekb.eg/article_37216.html}, eprint = {https://ejchem.journals.ekb.eg/article_37216_7cb71b73de429bb4ba73b16e89320bd9.pdf} } @article { author = {Taha, Rania H. and Gaber, Ghalia A. and Mohamed, Lamiaa and Ghanem, Wafaa A.}, title = {Corrosion Inhibition of Two Schiff Base Complexes on The Mild Steel in 1M HCl Solution}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {367-381}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.11232.1722}, abstract = {Corrosion inhibition of two Schiff base complexes were examined for mild steel in 1M HCl solution. These two Schiff base complexes, Cd(II) and UO2(II) were synthesized through the reaction of CdCl2.H2O and UO2(NO3)2.6H2O with the Schiff base ligand N-carbamimidoyl-4-((4-chlorobenzylidene) - amino) benzenesulfonamide in ethanol. The corrosion behavior was studied for the mild steel by weight loss method, Open circuit potential measurements (OCP), Potentiodynamic polarization (Tafel polarization), and Electrochemical impedance spectroscopy (EIS). The compounds have a promising corrosion inhibition materials for the mild steel in the investigated acid medium.}, keywords = {Schiff base complexes,Corrosion inhibition,HCl solution,mild steel}, url = {https://ejchem.journals.ekb.eg/article_34608.html}, eprint = {https://ejchem.journals.ekb.eg/article_34608_82fb1b513dff5336a859dfc719979113.pdf} } @article { author = {Abdel-Shafy, Hussein and Hewehy, Mahmoud A.I. and Razek, Taha and Hamid, Maamoun and Morsy, Rehan}, title = {Treatment of Industrial Electroplating Wastewater by Electrochemical Coagulation Using Carbon and Aluminum Electrodes}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {383-392}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.11667.1742}, abstract = {Electroplating wastewater is considered one of the most hazardous liquid wastes due to the presence of high contraction of toxic metals. Consequently, treatment of such wastewater is essential to protect the environment and waterways. Heavy metal ions are frequently of high toxicity and require treatment to the allowable standards for wastewater discharge. Electrochemical methods are more suitable for heavy metals removal due to their ability to reduce metal concentration to less than the permissible limits as well as allowing recovery of valuable metals. The aim of the present study is treatment of real electroplating wastewater. For this purpose, synthetic as well as real electroplating wastewaters were examined using soluble aluminium electrodes and insoluble carbon electrode along with ferric chloride and / or alum as coagulants. Factors affecting this treatment process were studied extensively, namely: current intensity, material of the electrode, pH and time. The obtained results proved that the best removal was achieved at 30 minutes and a potential difference 15 volt for aluminum electrode and 10 volts for carbon electrode. The later was combined with ferric chloride as coagulant. When the synthetic solution was examined by using aluminum electrode, the removal rate reached 97.2%, 97% and 96% for Zn, Cu, and Ni, respectively. By using carbon electrode in combination with ferric chloride, the respective removal rate reached 97.5%, 97.2% and 97.1%. By using the real electroplating wastewater and aluminum electrode, the removal rate reached 80%, 76.6% and 93.4% for Zn, Cu, and Ni respectively and by using carbon electrode and ferric chloride the achieved removal rate was 81.6%, 77.3% and 94.4% successively. It was concluded that the use of carbon electrode with FeCl3 is more suitable than aluminum electrode due to the dissolution of aluminum ions from electrode into the solution.}, keywords = {Electro-chemical treatment,electroplating wastewater,Electrocoagulation,Heavy Metals Removal,potential difference,Wastewater}, url = {https://ejchem.journals.ekb.eg/article_37215.html}, eprint = {https://ejchem.journals.ekb.eg/article_37215_6d457a8a22d96c977f764259a6edda1c.pdf} } @article { author = {Ben Rebah, Faouzi and Siddeeg, Saifeldin M. and Tahoon, Mohamed A}, title = {Thermodynamic Parameters and Solvation Behavior of 1-Ethyle-3-methylimidazolium Tetrafluoroborate and 1-Butyl-3-methylimidazolium Tetrafluoroborate in N,N-Dimethylformamide and Acetonitrile at Different Temperature}, journal = {Egyptian Journal of Chemistry}, volume = {62}, number = {Special Issue (Part 1) Innovation in Chemistry}, pages = {393-404}, year = {2019}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2019.11921.1751}, abstract = {The present paper investigations made on the ion-solvation interaction of new class of salts ionic liquids (IL) such as 1-Ethyle-3-methylimidazolium Tetrafluoroborate and 1-Butyl-3-methylimidazolium Tetrafluoroborate in N,N-Dimethylformamide and Acetonitrile at temperature range of 283.15 to 318.15K with the aid of using electrical conductivity precept. The electrical conductance data were analyzed with the aid of Fuoss – Justice equation of conductivity. The molar conductance (Λ), the limiting molar conductance (Λ0), the association constants (KA), the Walden product (Λ0 η0), The Eyring activation energy of charge transport (ΔH‡λ) and the standard thermodynamic parameters of association (〖∆G〗_A^o, 〖∆H〗_A^oand 〖∆S〗_A^o) were calculated and mentioned. The results show that, the molar conductance and the limiting molar conductance values have been diminished as the relative permittivity of the solvent lowered at the same time, the association constant increased. Additionally, the outcome exhibit that the values of the molar conductance, and the limiting molar conductance were increased as the temperature increased at the same time, the association constant increased indicating that the association process is an endothermic one as indicated from 〖∆H〗_A^o value. The effect of the alkyl chain length of IL is clear on the thermodynamic parameters and association properties.}, keywords = {Molar Conductance,Solvation,Ion Association,ionic liquids}, url = {https://ejchem.journals.ekb.eg/article_35317.html}, eprint = {https://ejchem.journals.ekb.eg/article_35317_0a7145c74500b70a927835e0a03807d0.pdf} }