The Egyptian Journal of Chemistry最新文献

{"title":"Comparative study of the variability of chemical composition and antibacterial activity between two Moroccan endemic species essential oils: Origanum grosiiPau & Font Quer and Origanum elongatum(Bonnet) Emberger & Maire","authors":"Romane Abderrahmane, Hassouni Hafssa, Soraa Nabila, F. Guido, Ascrizzi Roberta, B. Hichem","doi":"10.21608/EJCHEM.2021.39841.2812","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.39841.2812","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82973170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Phytochemical, Total phenolic and Antioxidant Activity of Carica Papaya Seed for Its Use in Biosynthesis of Gold Nanoparticles","authors":"S. A. Farhan, R. M. Dadoosh, A. M. Jassim","doi":"10.21608/EJCHEM.2021.63985.3371","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.63985.3371","url":null,"abstract":"Synthesis of nanoparticles using green methods with study of their propertie is one of great researchers’ concerns in fields of pharmaceutical and biomedical products. The present paper aiming to use of an eco-friendly route is used for biosynthesis of gold nanoparticles (AuNPs) using C. Papaya seeds as both reducing and stabilizing agent. Study of C. Papaya seed contents showed many compounds which analyzed via qualitative, quantitative and GC-MS analysis. The influence of C. Papaya concentration, contact time and temperature on the reaction rate and shape of AuNPs are confirmed The biosynthesized NPs are characterize via UV-Vis, AFM and SEM. The AFM and SEM analysis exhibit a size between 40-105nm with average diameter 75.68nm, and spherical in structure. The antioxidant activity and free radical scavenge activity are studied by using TLC and DPPH analysis. The results show that the C. Papaya seeds and AuNPs have potent antioxidant activity; moreover, the total phenolic contents are characterized. The data confirmed that the C. Papaya seed extract was a good bio-reductant way for AuNPs that can be applied as a promising field in different bio-applications.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86164229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Purity, Morphological, and Electrical Characterization of Silicon Dioxide from Cogon Grass (Imperata cylindrica) Using Different Ashing Temperatures","authors":"I. Irzaman, Diah Yustaeni, A. Aminullah, I. Irmansyah, B. Yuliarto","doi":"10.21608/EJCHEM.2019.15430.1962","DOIUrl":"https://doi.org/10.21608/EJCHEM.2019.15430.1962","url":null,"abstract":"Cogon grass (Imperata cylindrica) was a detrimental plant and often found in the tropics which contains silicon dioxide. The objective of this study was to extract silicon dioxide from cogon grass and to study the purity, crystal structural, and electrical properties of silicon dioxide from cogon grass. The silica of cogon grass was extracted by washing dry cogon grass using 3% HCl before the burning process, and the ashing temperatures were 500°C, 600°C, and 700°C with a temperature increasing rate of 1°C/minute. The SEM-EDX results showed that silica of cogon grass has an irregular shape and a purity of 99.99%. the XRD results showed that silica has an amorphous phase with peaks at 2θ = 21-23°. The electrical analysis showed that the higher the ashing temperature led to the higher the conductance, the conductivity, and the dielectric constant on silica of cogon grass. Besides, the higher the frequency, the higher the electrical conductance and conductivity, but the lower the dielectric constant of silica. Based on the electrical conductivity, the silica of cogon grass was in the range of semiconductor materials.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81316614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Removal of Nickel and Cadmium from Aqueous Solution using Carbonaceous Magnesium Oxide: Thermodynamic and Kinetic study.","authors":"S. Mohammed","doi":"10.21608/EJCHEM.2021.68673.3502","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.68673.3502","url":null,"abstract":"Generation and entrance of toxic materials to aqueous environment causes many problems to human health. In the current study, the removal efficiency of Cd (II) and Ni(II) from aqueous solution was investigated by carbonaceous magnesium oxide. Three types of C-MgO adsorbents were synthesized via pyrolysis of prepared magnesium complex Mg(acac)2 at three temperatures. Fabricated C-MgO adsorbents were characterized by XRD, SEM, and BET. XRD results revealed that the synthesized adsorbents consist of only magnesium oxide and carbon phase without any impurities. SEM technique used to characterizes the surface morphology of C-MgO samples. N2 adsorption-desorption isotherm used to calculate the BET surface area of prepared samples. The SEM results had a good agreement with BET measurement which improved that the high temperature increase the particles size and reduce the surface area. The adsorption studies showed that the carbonaceous magnesium oxides have good removal effeciency for Cd (II) and Ni(II) removal from aqueous solution and kinetically follow the pseudo-second order model.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75810726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In vitro cytotoxicity of Reishi mushroom extract against two human cell lines","authors":"N. Hamdan, A. Al-Abboodi","doi":"10.21608/EJCHEM.2021.64377.3380","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.64377.3380","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81436454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular docking , Synthesis and ADME Studies of New Pyrazoline Derivatives as Potential Anticancer Agents.","authors":"Ammar Wabdan, M. Mahdi, A. K. Khan","doi":"10.21608/EJCHEM.2021.64042.3377","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.64042.3377","url":null,"abstract":"Cancer is a significant worldwide public health issue. The adverse effects of anticancer chemotherapies still compromise the quality of life of patients. To identify new potential targeted anticancer agents, a series of pyrazoline derivatives were synthesized and evaluated for anticancer effects on A549 (human lung adenocarcenoma cell line). In silico evaluation methods were done before synthesis through molecular docking via genetic optimization for ligand docking (GOLD) Suite software with EGFR tyrosine kinase and exhibited significant tyrosine kinase inhibition activities compared with Erlotinb as a reference drug due to their hydrogen bonding and short contact interaction with key amino acids and these results are compatible with the experimental findings. The new derivatives were synthesized by incorporating pyrazoline pharmacophore into nabumetone moiety as a starting molecule and the chalcone derivatives as intermediate products. The compounds structure were confirmed by 1H-NMR, some physicochemical properties and infrared spectroscopy. An in vitro assay demonstrated that the final compounds (P1, P2, P3 and P4) exerted potent to moderate cytotoxic activity in the micromolar range with an IC50 values (15.409μM, 7.24μM, 27.05μM, 22.45μM) respectively when compared with Erlotinib (IC50 =25.23μM) while (P5&P6) show weak activity. Pharmacokinetic and physicochemical properties of the final compounds predicted by using ADME evaluations. The results showed all the synthesized compounds have high oral bioavailability and good GI absorption.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74283882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Multifunctional Cotton/nylon Blended Fabrics Using Nanoparticles of Different Metal Oxides","authors":"H. Ghazal, H. Helmy, H. Mashaly, Tawfik A Khattab","doi":"10.21608/EJCHEM.2021.70442.3551","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.70442.3551","url":null,"abstract":"Two-bath dyeing is currently used to dye cotton/nylon blended fabrics. The cotton/nylon blended fibers were initially pre-treated independently with metal oxides based nanoparticles (NPs) before being dyed with acid and reactive dyestuffs. Two baths were used for dyeing of NPs metal oxides pre-treated cotton/nylon fabric with reactive and acid dyes. The morphological properties of the treated fabrics were explored by scan electron microscope and energy-dispersive X-ray. The impact of pre-treatment with NPs metal oxides on dye-ability, colorfastness, and physico-chemical features has been studied. Colorimetric strength (K/S) and CIE Lab were also explored. K/S values, washing, perspiration, and light fastness of the cotton/nylon sample treated with metal oxide nanoparticles were all higher. Antimicrobial activity was also examined against strains of K. pneumoniae, S. aureus and Candida albicans. The findings indicating that colored fabric had antibacterial potential due to the antibacterial property of NPs metal oxides. Aside from the NPs-treatment colored fabrics with excellent UV protection properties are produced.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84787042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement for the fluorescent properties of new synthesized GFPs chromophore","authors":"Hesham H. El-Feky, Bahaa Elgendy, M. Azab, Marwa Gamil","doi":"10.21608/EJCHEM.2021.71465.3569","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.71465.3569","url":null,"abstract":"An alternative method for the synthesis of new GFP chromophore analogous that possess good photo physical properties which can be used as efficient biomarkers. These compounds have low fluorescence most probably due to their Z–E photo isomerization. These chromophores have suitable site for complexation with transitional metals. Forming complexes with metal ions can inhibit their photo isomerization and enhance the fluorescent properties.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83423535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical Studies Of Novel 3,4-Dichloro-N-((5-ChloroPyridin-2-yl)Carbamothioyl)Benzamide Based On Its Complexes With Copper(II), Cobalt(II), Nickel(II) and Zinc(II) ions","authors":"Ali A. A. Al-Riyahee, Diyar M. A. Murad, Ashwaq Shenta","doi":"10.21608/EJCHEM.2021.64395.3383","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.64395.3383","url":null,"abstract":"The synthesis of novel N,Nʹ-disubstituted benzoyl thiourea ligand [3,4-dichloro-N-((5-chloropyridin-2-yl)carbamothioyl) benzamide] (L) is achieved in two steps. First step by refluxing KSCN with 3,4-dichloro benzoyl chloride in CH3CN solvent and the other step by the reaction of the resulting filtrate from the first step with 2-amino-5-chloropyridine. The copper(II), Cobalt(II), Nickel(II) and Zinc(II) chloride and acetate salts were coordinated with L ligand in the 1:1 and 1:2 mole ratios (M:L) in the solvent mixture of DMF/H2O or CHCl3/methanol to form the complexes with structural formulas {[LMCl2] and [L2M](CH3COO)2, M= Copper(II), Cobalt(II), Nickel(II) and Zinc(II) ions}. Two mole ratios of the starting materials, 1:1 and 1:2 (M:L) were experimented to form chloride complexes, the product was with structural formula [LMCl2] while acetate complexes with [L2M](CH3COO)2 formula are resulted with the same conditions. Ligand L and its complexes [LCuCl2], [LCoCl2], [LNiCl2], [LZnCl2], [L2Cu](CH3COO)2, [L2Co](CH3COO)2, [L2Ni](CH3COO)2 and [(L)2Zn](CH3COO)2 have been characterized by mass spectrometry, elemental analysis, magnetic moments, conductivity measurements, solubility test, UVvisible, FTIR, H and C NMR spectroscopies. Electrochemical studies were probed by using cyclic voltammetry technique(CV). The data reflect the quasi-reversible reductive nature for the Copper(II) complexes with one electron transfer process while Nickel(II) and Cobalt(II) complexes exhibited two consecutive irreversible reductive nature. The observed UVvisible, elemental analysis, molar conductivity, magnetic moment measurements and solubility test revealed that the metal ion in the all prepared complexes adopted four coordinated square planar structures and [LCuCl2], [LCoCl2], [LNiCl2], [LZnCl2], are formed as neutral complexes while [L2Cu](CH3COO)2, [L2Co](CH3COO)2, [L2Ni](CH3COO)2 and [(L)2Zn](CH3COO)2 adopted anion complexes. The observed magnetic moments show diamagnetic properties of Zinc(II) and Nickel(II) complexes while Copper(II) and Cobalt(II) appeared as paramagnetic species. FT-IR analysis confirmed the coordination sites between the central metal ion with ligand L through two sites, the nitrogen atom in pyridyl ring and the sulphur atom in C=S group.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82568671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photocatalytic Decomposition of Dye polluted Wastewater Using Titanium Dioxide and Graphitic Carbon Nitride","authors":"Abdelaziz A. Noaman","doi":"10.21608/EJCHEM.2021.67049.3444","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.67049.3444","url":null,"abstract":"Advanced oxidation process (AOPs) is an alternative to the classical wastewater treatment methods which are environmentally friendly, producing harmless end-products such as CO2 and H2O2. APOs are in-situ treatment processes characterized by the generation of highly reactive intermediates (OH radicals) which can oxidize the target organic pollutants. This paper studied the operational parameters influencing the photocatalytic degradation rate of methylene blue in dye polluted wastewater treatment. These parameters are initial dye concentration, catalyst concentration, H2O2 volume. The catalysts used were titanium dioxide (TiO2) and supported Graphene (g-C3N4). Hydrogen peroxide (H2O2) was used in all experimental work to increase the efficiency of the UV / TiO2 process and supported Graphene (g-C3N4). The experiments of UV lamp revealed that the best degradation is at 5 ppm initial dye concentration, 0.5 g from g-C3N4 and 5 ml/dm3 H2O2 with efficiency 54.8 % at 180 minutes by using solar UV. The experiments of solar UV illustrated that the best degradation is at 15 ppm initial dye concentration, 0.5 g from g-C3N4 and 5 ml H2O2 with efficiency 80.64 % at 120 minutes. It’s confirmed that using the solar unit is the best choice for the photocatalytic oxidation process","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90866755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}