National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Spectrophotometric Determination of Cerium(III) in Some Industrial and Plant Samples Using New Synthesized Azo-dye Reagent: Synthesis and Characterization240524176602710.21608/ejchem.2019.16914.2029ENKhaledElgendychemistry department, faculty of science, zagazig university, zagazig, egyptAkramEldidamonyDepartment of Chemistry
Faculty of Science, Zagazig University Zagazig, EgyptMounirZakychemistry department, faculty of science, zagazig university, zagazig, egyptBadrAbd El Wahaabchemistry department, faculty of science, zagazig university, zagazig, egyptJournal Article20190912New spectrophotometric method was proposed for the rapid and accurate determination of Ce(III) using a new synthesized sulfacetamide azo-dye reagent [N-(4-((2,3-dihydroy-5-(3,5,7-trihydroxy-4-oxo-4H-chromen-2-yl)phenyl)diazenyl) phenylsulfonyl)acetamide] [DTPPA]. The reagent was characterized by IR, 1HNMR and mass spectra. The developed method was based on the reaction of Ce(III) with DTPPA reagent to form brown colored complex in an alkaline medium using borate buffer at pH = 9 with absorption maximum at 560 nm. The method was enhanced by the use of cationic surfactant of cetylpyridinium bromide (CPB). Different factors affecting the formation and stability of the complex such as reagent concentration, time, temperature, solvents and order of addition were also studied. The composition of the complex was found 1:2 (metal: ligand) by both Job's and molar ratio methods. The stability constant of the complex was calculated to be 3.387×106. Beer's law was obeyed in the concentration range of 5.0-100 µg mL-1 of Ce(III) with molar absorpitivity and Sandell’s sensitivity 1.020×104 L mol-1 cm-1 and 0.01373 µg cm-2, respectively. The proposed method was applied for the determination of micro-amounts of Ce(III) in some industrial and plant samples. The Ce(III) complex was also prepared in the solid state.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Blending and Characterization of Gold Nanoparticles with Omega-3 Oils Induces Antidiabetic, and Antioxidant Activities in-vivo241924336602510.21608/ejchem.2019.18861.2159ENAmira FawzySolimanDepartment of nutritional chemistry and metabolism, National Nutrition Institute (NNI) - Healthy Minster, Cairo, Egypt0003-2361-4235Mohamed AAbdel-RahmanAssistant Professor of Molecular Toxicology & Physiology of zoology, Zoology Department, Faculty of Science, Suez Canal University, Ismailia, Egypt.0002-4876-8997Hanaa HHamadProfessor of Environmental science for nutritional chemistry and metabolism. Department of nutritional chemistry and metabolism, National Nutrition Institute (NNI) - Healthy Minster, Cairo, Egypt.0003-0443-0940Elsayed HEltamanyProfessor of Organic chemistry, Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt.0002-1657-5234Al-SayedAl-SherbiniProf. of Photochemistry and Nano chemistry, Department of Measurements, Photochemistry and Agriculture Applications, National Institute of Laser Enhanced Science (NILES), Cairo University, Giza, Egypt.0002-9477-3113Journal Article20191029The aim of the study is to explore the antidiabetic and antioxidant activities of gold nanoparticles (AuNPs) mixed with either flaxseed oil (FLO) or fish oil (FIO). A pyrolysis method was used to prepare AuNPs in oleic acid. The characteristics of the sample were determined by using the transmission electron microscope (TEM) and UV spectroscopy. Male albino rats were divided into two main groups. Group one (n=10 rats) was fed on the basic diet (serves as healthy control). The other group was fed on the high fructose diet (HFD) for four weeks and then was divided into five subgroups. 1st subgroup was fed on HFD only, 2nd and 4th subgroups were fed on HFD mixed with omega-3 oils while 3rd and 5th fed on HFD+ omega-3 oils mixed with AuNPs. Results revealed that there was a significant decrease in glucose level, serum insulin, homeostasis model assessment of insulin resistance (HOMA-IR) index and lipid peroxidation in oils nanoparticles treated groups compared to the HFD group and a significant increase in the homeostasis model assessment of β-cell function (HOMA-β) and Glutathione (GSH). It can be concluded that AuNPs mixed omega-3 oils have more anti-diabetic, hepatic protection and antioxidant properties than omega-3 oils alone.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Nutritional Evaluation, Chemical Investigation of Phenolic Content and Antioxidant Activity of Ferocactus Glaucescens Ripe Fruits243524446539210.21608/ejchem.2019.20296.2216ENSeham S.El-HawaryPharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr-El-Ainy Street, 11562, Cairo, EgyptRana M.IbrahimPharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr-El-Ainy Street, 11562, Cairo, Egypt0000-0002-2525-5021Ahmed R.HamedChemistry of Medicinal Plants Department, National Research Centre, El Bohouth st., Dokki, 12622, Giza, EgyptBiology Unit, Central Lab for the Pharmaceutical and Drug Industries Research Division, National Research Centre, El Bohouth st., Dokki, 12622, Giza, EgyptAli M.El-HalawanyPharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr-El-Ainy Street, 11562, Cairo, EgyptJournal Article20191129The present investigation aimed to assess the nutritional properties of the ripe fruits of Ferocactus glaucescens (DC.) for the first time. Total polyphenols and flavonoids in the methanolic extract of the fruits were determined colorimetrically and the quantification of their components was carried out using HPLC-UV. Antioxidant activity of the extract was also evaluated using DPPH+ method. Total phenolics and flavonoids estimated as gallic acid and quercetin equivalents (mg/g of the dried extract) were 8.39 ± 0.074 and 3.82 ± 0.019, respectively. HPLC analysis of the phenolic compounds enabled the identification and quantification of 31 phenolic compounds (12 flavonoids and 19 phenolic acids). Naringenin was the major identified flavonoid (23.4 ± 1.2 mg/100g). While, trans-cinnamic acid was the major identified phenolic acid (22.37 ± 0.9 mg/100g). Also, DPPH assay revealed marked antioxidant activity of the methanolic extract. In nutritional analysis, carbohydrates (18.8 g/100g), protein (1.2 g/100g), total lipid (1.3%) and crude fiber (10.1%) content were detected. Vitamin C (503.12 mg/100g) was higher when compared to other two vitamins evaluated. Eight minerals were also quantified. These results suggest that F. glaucescens fruit is a rich source of nutrients and antioxidant compounds such as phenolic compounds and highly recommended for consumption.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Hydrothermal Leaching of Nickel, Uranium and the Remaining Vanadium from Alkali Treated Boiler Ash Residue using Citric Acid244524556602410.21608/ejchem.2019.20414.2224ENEl-Sayed A.ManaaNuclear Materials Authority, El-Maadi, Cairo, EgyptMohamed N.KouraimNuclear Materials Authority, El-Maadi, Cairo, EgyptMohamed A. M.YoussefNuclear Materials Authority, El-Maadi, Cairo, EgyptAhmed R.BakryNuclear Materials Authority, El-Maadi, Cairo, EgyptEkramyEl-DesokyNuclear Materials Authority, El-Maadi, Cairo, EgyptJournal Article20191202In this study; the boiler ash was subjected to a digestion process using citric acid solution. Previously the ash was treated with NaCO3-NaHCO3 solution for vanadium leaching. In this step about 85% of vanadium content was leached while nickel was not dissolved using the carbonate solution. The ash after vanadium dissolution was digested using citric acid for nickel and the remaining vanadium beside uranium dissolutions. Experimental results have shown that maximum metals dissolution obtained using 0.3M citric acid was 81, 85 and 89% respectively. The resultant liquor solution was subjected to successive nickel, vanadium and uranium separations. Firstly; the leach liquor is treated with dimethylglyoxime solution to precipitate Ni species. Secondly; the filtrate after Ni separation is treated with TBP/kerosene solvent for uranium extraction. Finally, the aqueous solution is treated with ammonium chloride to precipitate the vanadium content.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Use of Waste Rubber and Bionanofiller in Preparation of Rubber Nanocomposites for Friendly Environmental Flooring Applications245724716539410.21608/ejchem.2019.20433.2225ENBasmaSalehPolymer Metrology and Technology Department, National Institute of Standards (NIS), Giza, EgyptSoma A.El MogyPolymer Metrology and Technology Department, National Institute of Standards (NIS), Giza, EgyptJournal Article20191202One major environmental problem that cannot be solved on a large scale is the tire waste. Such tires accumulate to form waste mountains which cannot be easily handled. This study suggests a solution, if succeeded, that consumes half of this waste, when applied. The waste tire powder (WTP) is blended with natural rubber (NR) then mixed with a natural bionanofiller in the ratio of 1:1. This bionanofiller is the rice husk nanoparticles (RH-NPs) it was made by ball milling technique then added to WTP/NR in different concentrations; 0, 1.25, 2.5, 5.0, and 10.0 phr to give WTP/NR nanocomposites. Another batch was prepared in which the RH-NPs were mixed with an unsaturated polyester resin adhesive (PEA). The effect of adding PEA in addition to RH-NPs on the prepared nanocomposites was also investigated. Morphological studies via SEM analysis revealed that, at low content of RH-NPs (2.5wt.%), the RH-NPs were homogeneously dispersed in the nanocomposite matrices. TGA analysis declared that the addition of RH-NPs enhanced the thermal stability of WTP/NR nanocomposites, especially for those containing PEA. Mechanical tensile properties including tensile strength, Elongation modulus and elongation at break percent lead us to the same results. Results of testing the antimicrobial activity showed that the addition of the bionanofiller had a significant effect in enhancing the antimicrobial activity (AMA) against Staphylococcus aureus (S. aureus) bacteria, while the use of PEA affected badly AMA. Thus, the addition of RH-NPs in low percentages to WTP/NR composites enhances the mechanical, abrasion, thermal insulation properties as well as compression set. The prepared nanocomposites show antibacterial activity against S. aureus. This study offers a solution to manage a serious environmental problem by with a potential of being safely used in flooring applications such as kinder garden, hospitals and school playgrounds.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Bezafibrate Scaffold Derived Hydrazide-Hydrazones: Synthesis and Antioxidant Activities247324828206310.21608/ejchem.2020.20809.2251ENHARI BABUBollikollaDEPT. OF CHEMISTRY,
ACHARYA NAGARJUNA UNIVERSITY,
NNAGAR,AP-INDIA0000-0003-1308-391XRamya KrishnaPdept. of chemistry,
acharya nagarjuna university,
gunturSailajaGdept. of chemistry, Singareni Collieries Women’s Degree College, Kothagudem-507101, Telangana, IndiaUmamaheswara RaoVangaDepartment of Microbiology, Acharya Nagarjuna University, nnagar, Guntur-522510, AP., IndiaJournal Article20191213A new series of Bezafibrate derived hydrazide-hydrazone analogues were generated by using some five membered, fused heterocyclic and aromatic aldehydes. All the hydrazones were obtained in good yields from methanol at 60-80 °C for 5-8 hours stirring. Moreover, the compounds were also screened after their anti-oxidant activity potentiality at four different concentrations using DPPH method. Among these compounds, compound 6k analogue of bezafibrate was found to be the most active at all the tested concentrations (≈ 40% inhibition at 25 μg/mL ) followed by 6j (4-hydroxy, 3-methoxy 5-bromo analogue ≈ 35% at 25 μg/mL) compared to standard ascorbic acid (49.6% at 25 μg/mL).National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Use of Polyacrylic Acid Hydrogel in The Desalination of Seawater of Haql Coast of Saudi Arabia248324908099710.21608/ejchem.2020.22897.2366ENMazenAlSolamiDepartment of Biology, Environmental Research Unit, College of Haql, University of Tabuk, Tabuk 71491, Saudi ArabiaJournal Article20200127Decreasing freshwater resources of the world has led to the use of seawater for human consumption. But availability of high concentration of salts in seawater makes it unsuitable for direct use, therefore, the seawater is desalinized by various techniques. The present investigation was carried out to test the efficacy of prepared polyacrylic acid hydrogel (PAA) in the desalination of seawater of Haql coast of Saudi Arabia. Hydrogels were prepared from PAA with different concentrations of N, N´- methylene bisacrylamide cross-linker, ammonium persulfate and N, N, N`,N`-tetramethylethylenediamine. Free radical polymerization technique was used to proceed the reaction. The chemical structure was evaluated by infrared spectroscopy. The glass transition temperature was recorded by differential scanning calorimetery. Seawater of Haql coast was used to evaluate the swelling properties of hydrogels. The swelling and desalination of water were measured as a factor of time. The results of the study showed that prepared hydrogels were found helpful in the desalination of water samples. Highest desalination was observed in the gels with the largest pore size.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Utilizing Some Synthesized Nanostructured Materials to improve The Functional Properties of Cotton Fabric for Possible Applications249125077650610.21608/ejchem.2020.22838.2387ENGomaaS.HDepartment of Chemistry, Faculty of Science, Al-Azhar University (Girls), Nasr City, Cairo, Egypt.Nora M.HilalDepartment of Chemistry, Faculty of Science, Al-Azhar University (Girls), Nasr City, Cairo, Egypt.0000_0001_5935_9411ElsisiA.A.Department of Chemistry, Faculty of Science, Al-Azhar University (Girls), Nasr City, Cairo, Egypt.A.GEmamDepartment of Chemistry, Faculty of Science, Al-Azhar University (Girls), Nasr City, Cairo, Egypt.RaniaM.A.Department of Chemistry, Faculty of Science, Al-Azhar University (Girls), Nasr City, Cairo, Egypt.Journal Article20200202The potential of the synthesized Copper Oxide (CuO)and Graphene Oxide (GO)nanostructures as an efficient modifier for cotton fabric surface, to enhance its functional properties when dyed with C.I. Reactive Yellow 160 (RY 160) was investigated. For this purpose, Copper Oxide nanoparticles (CuO NPs) and Graphene Oxide nanoparticles (GO NPs) were synthesized and characterized through SEM, and EDX analysis, TEM analysis, FTIR spectrum analysis and X-ray diffraction (XRD) analysis. The cotton fabric was first treated separately with CuO NPs and GO NPs, and then dyed with RY160. The dye exhaustion percentages (E%) of pretreated cotton fabric samples were compared with their corresponding values obtained through conventional dyeing of untreated cotton. Dye adsorption rate constants according to pseudo-first order, pseudo-second order, and intra-particle diffusion kinetic models were calculated. Moreover, the diffusion coefficients and the activation energy of diffusion of RY160 into cotton fabrics were calculated before and after NPs treatment. The activation energy of diffusion of RY160 into pretreated GO NPs-cotton fabric was the lowest value, saving 44.06% of the energy required for conventional dyeing completion. The overall adsorption process follows pseudo-second order kinetics and intraparticle diffusion model. The corresponding thermodynamic parameters, namely enthalpy (∆ Hͦ), entropy (∆ S ͦ), and free energy changes (∆ G ͦ), were also calculated for untreated cotton fabric and compared with the data obtained for treated cotton fabrics after surface modification via synthesized nanomaterials, CuO NPs and GO NPs. The NPs treatment produces a cotton fabric with advanced color fastness and antibacterial properties enabling them to improve human health care and decrease the environmental impacts and fabric damage.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Comparative Phytochemical and Biological Study for Mesembryanthemum Nodiflorum and Aptenia Cordifolia Plants Growing in Egypt250925226718110.21608/ejchem.2020.20877.2248ENSeham Salah EldinEl HawaryPharmacognosy Department, Faculty of Pharmacy, Cairo University,Cairo, Egypt0000-0002-6823MarwaHassanPharmacognosy department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt0000-0002-0952-598DinaMostafaPharmacognosy Department, Faculty of Pharmacy, Misr University For Science and Technology0000-0002-8254-4284SamehAbouZidPharmacognosy Department, Faculty of Pharmacy, Heliopolis University, Cairo, Egypt.0000-0002-0789-767xAmanySleemPharmacology Department, National Research Centre, Dokki, Giza, EgyptRababMohammedBeni-Suef University
Beni-Suef Uni0000-0001-9683-4250Journal Article20191212In this work, Evaluation of the biological activity and the chemical composition of Mesembryanthemum nodiflorum and Aptenia cordifolia growing in Egypt were carried out. The chemical composition of both plants was evaluated by GC/MS and HPLC/MS analysis. GC/MS analysis of the unsaponifiable matter of Mesembryanthemum nodiflorum and Aptenia cordifolia resulted in the identification of 17 and 13 compounds; respectively, the major compounds were octadecane and neophytadiene; respectively. GC/MS analysis of the saponifiable matter of Mesembryanthemum nodiflorum and Aptenia cordifolia resulted in the identification of 12 and 18 compounds; respectively. The palmitic acid was the most abundant saturated fatty acid in both species. HPLC/MS analysis of Mesembryanthemum nodiflorum and Aptenia cordifolia resulted in the identification of 36 and 48 compounds; respectively. Finally biological studies indicated that the extract of Mesembryanthemum nodiflorum has more potent analgesic effect and also showed significant inhibitory activity against colon, cervix, liver and normal melanocyte carcinoma. The 70% ethanol extracts of the aerial parts of plants under investigation have a significant hypoglycemic effect, anti-oxidant, anti-inflammatory and hepatoprotective activity; where Aptenia cordifolia extract was more potent than Mesembryanthemum nodiflorum extract.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Evaluation of Thermal and Mechanical Properties of Crumb/Natural Rubber Nanocomposites252325326539510.21608/ejchem.2019.5522.1493ENBasmaSalehPolymer Metrology and Technology Lab., NIS, Egypt.SawsanHannaPolymer Metrology and Technology Lab., NIS, Egypt.Mervat HassanKhalilHeat and Moisture Department, building Physics Institute, Housing and Building National Research Center,
Cairo, Egypt.Journal Article20181019Although crumb rubber or waste tires are not classified as hazardous waste, they can cause environmental pollution if disposed incorrectly or irresponsibly. Waste tires can be put to many beneficial uses from one side and to protect the environment via limitting its accumulation when reaching their end of life from the other side. Shredded tires can be added to rubbers to be used in making school playgrounds, equine bedding and football pitches. This may result in the reduction of the mechanical properties of the composites which can be kept by the use of higher levels of other fillers in addition to crumb and hence keeping and even more enhancing these mechanical properties. The crumb rubber was added to natural rubber in the ratio of 10:100 by weight with the partial removal of the carbon black, from 60 to 20 phr, by montmorillonite (organo-modified nanoclay). The modified nanoclay was added in different loadings; 0, 2.5, 5, 7.5, and 10 phr to the rubber mix formulations. Results of morphological analysis revealed the good miscibility and homogeneity between crumb and Natural rubber in one hand and all other ingredients in the other hand.The mechanical, thermal measurements the role of OMMT in enhancing the mechanical and thermal properties of the crumb/NR nanocomposites. The addition of crumb rubber reduces the hazardous working environments for personnel, lower the production cost by making a good use of waste tires and presents a green solution for getting rid of an environmental problem.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Comparative Study for Synthesis of Novel Mn (II), Co (II), Ni (II), Cu (II), Zn (II) and Zr (IV) Complexes under Conventional Methods and Microwave Irradiation and Evaluation of their Antimicrobial and Anticancer Activity253325506832210.21608/ejchem.2020.21048.2255ENAliM. HassanAl Azhar University0000-0001-9509-9266Bassem HussenHeakalResearch Laboratory, Cairo Oil Refining Company, Mostorod, Qaliobia, EgyptAhmed OsmanSaidSenior researcher chemist, Greater Cairo Water Company, Cairo, Egypt0000-0002-2473-9315Wael MahmoudAboulthana33 Bohouth St., P.O. 12622, Dokki, Giza, Egypt0000-0002-4848-0731Miral AhmedAbdelmoazPharmaceutical Chemistry Department, Faculty of pharmacy, Sinai University E-mail addressJournal Article20191215A novel Schiff base ligand derived from o-Vanillin, N, N-Diethyl-p-phenylenediamine in 1:1 molar ratio, and its metal complexes of Mn (II), Co (II), Ni (II), Cu (II), Zn (II) and Zr (IV) were synthesized by microwave and conventional methods. The ligand and its complexes were characterized by elemental analysis, FT-IR, UV-Vis, 1HNMR, mass spectroscopy as well as Thermo-Gravimetric Analysis (TGA). The geometry of the proposed Structures of the chelates based on their Electronic spectra, Electron paramagnetic resonance (EPR) and magnetic moment. The thermal dehydration and decomposition of the complexes were studied kinetically using the integral method applying the Coats–Redfern and Horowitz Metzger equation. Study the Variation of magnetic susceptibility at Different temperature for Mn (II) and Co (II) complexes. Surface morphologies were analyzed by Scanning electron microscopy (SEM). The ligand and its metal complexes were screened for antimicrobial activity against Gram-positive, Gram-negative bacteria as well as fungi. Cu (II) complex achieved a brilliant inhibition zone diameter against E. coli almost reached the inhibition zone diameter record by standard positive control Cephalothin making it eligible for treatment of E. coli. Also, Cytotoxicity Evaluation was applied against two cell lines; human colon carcinoma (HCT) and liver cancer cells (HepG-2).National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Assessment of Biological Augmentation Technology of Hazardous Pollutants Existing in Drainage Water in Bahr El-Baqar Drain, Egypt255125636594510.21608/ejchem.2019.20749.2244ENHananFouadDepartment of Sanitary and Environmental Engineering at Shoubra, Behna University, Benha, EgyptRehab M.HefnyDepartment of Sanitary and Environmental Engineering at Shoubra, Behna University, Benha, EgyptAl Moaataz Bellah M.M.KamelDepartment of Sanitary and Environmental Engineering at Shoubra, Behna University, Benha, EgyptMoahmedEl-Liethy2Water Pollution Research Department, Environmental Research Division, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt.BahaaHemdan2Water Pollution Research Department, Environmental Research Division, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt.Journal Article20191211The objectives of the present study were to improve the quality of drainage water for reuse through the reduction of COD, BOD, TSS, TN, TP, and ammonia, also the removal of odor and detoxification of toxic compounds. The designed system for the treatment of drainage wastewater collected from Bahr El-Baqar drains was performed. The bioactive bacterial strains were applied in this system and followed by the electrocoagulation process. The phyico-chemical and biological parameters were estimated for raw and treated drainage wastewater and compare the quality of treated drainage water according to law 1948. The results acquired pointed out the level of physicochemical items, and the numbers of bacterial indicators in Bahr El-Baqar drainage wastewater have been decreased after biological augmentation treatment after 6, 12 and 24 h. As well, The pH was around 7.2 and 7.4 after biological treatment (table 3). Total suspended solid (TSS) declined from 124 mg/L in Bahr El-Baqar drainage water to 88 mg/L, 75.6 mg/L, 63.2 mg/L after 6, 12 and 24 h contact time, Also, TDS declined from 2410 mg/L in Bahr El-Baqar drainage water to 1710 mg/L, 1470 mg/L, and 1229 mg/L after 6, 12 and 24 h contact time, respectively. The current research concluded that the quality of drainage water was improved after the combined process (biologically and electrocoagulation treatment). The present research, therefore, considered that these technologies are economical and eco-friendly approach to be used in drainage water treatment.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Evaluation of Antibacterial Activity of Chitosan against Different Bacterial Strains226522756690010.21608/ejchem.2019.20467.2227ENWalaa AhmedDarweeshMicrobiology Department, Sanitary and Environmental Engineering Institute, Housing & Building National Research Center (HBRC), Giza, Egypt.Samah Abd El- RazikMohamedMicrobiology Department, Sanitary and Environmental Engineering Institute, Housing &Building National Research Center (HBRC), Giza, EgyptWaheed MahmoudEmamZoology Department, Faculty of Science, Ain shams University.OsmanAbd El MoniemGeology Department,Faculty of Science, Ain shams UniversityM.A.El-KhateebWater Pollution Control Dep., National Research Center, Dokki, Cairo, Egypt0000-0001-8670-265XJournal Article20191203The present study is related to new green and low cost technical method for wastewater treatment using chitosan as natural material. Chitosan was prepared from chitin of the seafood’s shell (Procambrus clarkia). Preparation of chitosan was carried out by a chemical process involving demineralization, deproteinization and deacetylation. Chitosan is largely known for its activity against a wide range of microorganisms. Antibacterial effect of different doses of chitosan (0.09, 0.2, 0.4, 0.6 and 0.8 g) on Escherichia coli (E. coli) bacteria in the secondary treated wastewater samples was studied. The secondary treated wastewater was collected from Zenein wastewater treatment plant. Also the effectiveness of chitosan on Enterococcus faecalis, Bacillus subtillus, Staphylococcu saureus (gram +ve bacteria), Escherichia coli, Enterobacter aerogenes (gram –ve) was evaluated by the reduction in total bacterial count of each strain in synthetic media. The study was extended to measure the antibacterial activity (inhibition zone) of chitosan on E. coli by the poured plate method. The results indicated that the optimum conditions at which 99.98% removal for all types of bacteria were 0.6 g chitosan, contact time 30 min and shaking 250 rpm. According to the obtained results, the most acceptable antimicrobial mechanism is found to include the presence of charged groups in the polymer backbone and their ionic interactions with bacterial wall constituents. It could be concluded that chitosan could be used for disinfection of the secondary treated wastewater.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Synthesis, Molecular Modeling and Biological Evaluation of Indeno[1,2-b]quinoxaline Derivatives as Antifungal and Antibacterial Agents257725906832010.21608/ejchem.2020.21366.2275ENHayam A.Abd El SalamGreen Chemistry Department, Chemical Industrial Research Division, National Research Centre.0000-0003-3848-3450Magda A.El-BendaryMicrobial Chemistry Department, Genetic Engineering and Biotechnology Division, National Research Centre.MedhatIbrahimSpectroscopy Department, National Research Centre, 33 El-Bohouth St, Dokki, Giza, Egypt, P.O.12622.Fatma A.El-SamahyGreen Chemistry Department, Chemical Industrial Research Division, National Research Centre.Journal Article20191224The (11H-indeno[1,2-b]quinoxalin-11-ylidene)thiocarbohydrazonewere synthesized and consequently some new novel structures were obtained in a good yields. Their chemical structures were assigned by means of spectral analysis. Molecular modeling at B3LYP/6-31 g (d, p) is utilized to calculate both the optimized structure and vibrational spectra of some studied structures. A promising antimicrobial result was obtained from the new synthesized compounds.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Design, Synthesis and Antibacterial Study of New Agents Having 4-Thiazolidinone Pharmacophore259126036539310.21608/ejchem.2019.17518.2088ENSarah SedqiIsmaeelCollege of pharmacy, university of Mosul, Mosul, Iraq.Monther F.MahdiDean of pharmacy, Al-Mustansiriyah University, Baghdad, Iraq0000000220694121Basma M.Abd RazikCollege of Pharmacy, Al-Mustansiriyah University, 10001, BaghdadJournal Article20191003A new series of compounds containing 4-thiazolidinone pharmacophore 5(a-d) have been synthesized. The chemical structure of the intermediate and final compounds was characterized and confirmed by using FT-IR and 1H-NMR spectroscopy. All final compounds were tested against Gram-positive and Gram-negative bacteria using a well-diffusion technique for their ability as antimicrobial agents. The 5b and 5c compounds tested showed comparable antibacterial activity against Gram-negative bacteria and Gram-positive bacteria, such as Escherichia coli, Acinetobacter bumannii, Staphylococcus aureus, and Streptococcus pyougenes, as a standard drug compared to Trimethoprim. Simulations of the molecular docking of the molecular core were studied. The results have come from an in vitro-based docking of the most active compounds into the active protein site of the bacteria.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Chemical Investigation of Flavonoid, Phenolic acids Composition and Antioxidant activity of Tagetes erecta Flowers260526156602310.21608/ejchem.2019.19839.2197ENHanim AYoussefDepartment of agriculture chemistry, faculty of agriculture, Mansoura universitySafaa MAliDepartment of agriculture chemistry, faculty of agriculture, Mansoura univeristyMostafa ISanadDepartment of agriculture chemistry, faculty of agriculture, Mansoura universityDawood HDawoodDepartment of agriculture chemistry, faculty of agriculture,Mansoura univeristyJournal Article20191119This study was geared towards discovering the chemical profile and in vitro antioxidant activity of methanol (MeOH) extract and its ethyl acetate (EtOAc) fraction of Tagetes erecta orange flowers. A total of 29 known chemical compounds including phenolic acids and flavonoid compounds were identified and quantified using high performance liquid chromatography (HPLC) technique. The identification was carried out in EtOAc fraction for the first time. Pyrogallol and vanillic acid were highly abundant phenolic acids in flowers methanolic extract and its EtOAc fraction amounted 37.57 and 3.34mg/g dry extract, respectively. On the other hand, apig-6-rhamnose-8-glucose and hesperidin were found to be the major flavonoid compounds detected in MeOH extract amounted 18.34 and 0.66mg/g dry extract, respectively. Furthermore, results asserted that the tested samples were more efficient in the three applied antioxidant methods compared with standard antioxidant references (Ascorbic acid and BHT), especially EtOAc fraction which displayed the most activity against 1, 1-di phenyl-2-picrylhydrazyl (DPPH) radical with IC50 value 32.5± 0.12 µg/ml. These finding highlighted the use of Tagetes erecta flowers as a promising source of alternative bioactive compounds for both industrial and medicinal uses.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Synthesis,Spectroscopic Investigation, Anti-Bacterial and Antioxidant Activites of Some New Azo-Benzofuran Derivatives261726296603310.21608/ejchem.2019.14844.1899ENMzgin M.AyoobDepartment of Chemistry, college of education, Salahaddin University-Erbil0000-0001-9828-7828Farouq EHawaizDepartment of Chemistry, College of Education, Salahaddin University – Hawler, Erbil-Kurdistan, IraqAwazHusseinDepartment of Chemistry, College of Education, Salahaddin University – Hawler, Erbil-Kurdistan, IraqMohammed K.SamadDepartment of Chemistry, College of Education, Salahaddin University – Erbil Erbil-Kurdistan, Iraq0000-0003-0725-4014FaiqHussainTIU, Research Center, Tishk International University, Erbil, IraqShaaban KMohamedDivision of Chemistry and Environmental Science, Manchester Metropolitan University, Manchester,, United KingdomJournal Article20190715This Article deals with the stepwise synthesis and spectroscopic characterization of some new azo benzofuran derivatives, started from the diazotization of substituted aniline coupled with 2-hydroxy benzaldehyde. On reacting of the azo of 2-hydroxy benzaldehyde with p-bromo phenacyl bromide, the benzofuran (3a-g) are obtained. The structure of the new benzofuran derivatives have been characterized by using FT-IR, 1H-NMR,13C-NMR and DEPT-135 NMR. The biological activity of some new synthesized compound was obtained by vitro anti oxidant and anti microbial activity with both Staphylococcus aureus and Escherichia coli .The results showed that the new benzofurans have mild anti oxidant activity compared to the standard ascorbic acid.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Chenopodium Murale Essential Oil Alleviates The Genotoxicity and Oxidative Stress of Silver Nanoparticles in The Rat Kidney263126466602610.21608/ejchem.2019.18341.2128ENMossad AttiaAbdel-WahhabDepartment of Food Toxicology & Contaminants. National Research Center0000-0002-7174-3341Helmy M.SAhmedDepartment of Pharmacology & Toxicology, Faculty of Pharmacy, Cairo UniversityAziza AEl-NekeetyFood Toxicology & Contaminants Dept., National Research CenterSekena HAbdel-AziemCell Biology Dept, National Research CenterHafiza A.SharaPathology Dept., National Research CenterMohamedAbdelazizMicrobial Chemistry Dept., National Research Center0000-0001-9151-5920Mohamed F.SallamNew Kasr Al-Ainy Hospital, CairoFathia A.MannaaPhysiology Dept. National Research CenterJournal Article20191017This study aimed to synthesize AgNPs using Chenopodium murale extract (CME), to evaluate the antioxidant activity of the Chenopodium murale essential oil (CMEO) and the protective role against nephrotoxicity of AgNPs. Seven groups of female Sprague-Dawley rats were treated orally for 21 days included the control group, AgNPs-treated groups (25 or 50 mg/kg b.w), CMEO-treated groups (0.5 or 1 mg/kg b.w) and AgNPs plus CMEO-treated groups. The synthesized AgNPs were 30-50 nm in size. CMEO is rich in total phenolic and flavoniods and showed high antioxidant and radicals scavenging activity in vitro. AgNPs disturbed kidney function, decreased the antioxidant enzymes, increased serum electrolytes, TNF-α, MDA and NO, up-regulated Bcl-2, down-regulated Bax and P53 and induced histological changes in kidney tissue. CMEO protected the kidney against AgNPs toxicity in a dose-dependent manner. It could be concluded that AgNPs induced cytotoxicity and oxidative stress in the kidney. CMEO overcomes the nephrotoxicity and should be considered as a supplement to protect the kidney against oxidative stress.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Assessment in vitro Controlled Release Polymeric Nanocomposites Material Loaded with Different Drugs264726596721510.21608/ejchem.2020.18885.2161ENFahima MHelalyPolymers and Pigment, National Research Centre, Cairo0000-0003-2255-7929Doaa EssameyEl-NasharHead of Polymers and Pigment Department,
Chemical Industries Research Division,
National Research Centre,0000-0001-9836-7908Aman IKhalafDr. Aman Ibrahim Khalaf
Polymers and Pigments Dept.
National Research Center
Dokki, Cairo, Egypt
Mobile: +20124342459SamaaSalamNational Research CentreJoannaWietrzykHirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Science, PolandMagdalenaMilczarekHirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Science, PolandAbdelmohsenSolimanTherapeutic Chemistry dept.
National Research Centre, Dokki, Giza, Egypt0000-0001-8816-5309GhadaAwadPharmaceutical and Drug Industries Research divisionJournal Article20191030Synthesized starch cellulose acetate coacrylate (SCACA)/ Sodium bentonite modified Tween-80 (MSB) nanocomposites holding anticancer drugs like 5-fluorouracil (5-FU), Doxorubicin hydrochloride (DOX), and Chlorambucil (CA) as controlled release systems were evaluated and assessment as antiproliferative activity towards breast cancer cell lines, and antimicrobial activity against some strains. The nanocomposites loaded drugs characterized by Zeta Potential, FTIR, SEM and TEM. The results indicated that no change in the chemical structures and physical properties of the drugs into the nanocomposites. The surface texture of the samples was homogenous and smooth with no evidence of aggregations after release and there were some pore like structure and cracks formed due to blooming of drug outside nanocomposites. The particle size diameter of the prepared polymer was found to be 73 ~ 79 nm. After holding Doxorubicin the particle size was from 18 to 24 nm , 5-fluorouracil from 15 to 18 nm and Chlorambucil was from 24 to 75 nm. The release of drug was measured spectrophotometrically. The values of drug released depend on the type and nature of drug as well as the environmental aqueous media. The release in alkaline and acidic media was more faster and higher than that in the neutral one.<br /> The invitro study results of anticancer drugs released from polymers placed inside the culture media, showed 5-FU was given an effective promising results compared to DOX and CA. The antimicrobial test revealed that, the released 5-FU gave the highest effect as antimicrobial against all tested strains followed by DOX and CA.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Potential of Food Processing Wastewater Treatment for Reuse266126726539110.21608/ejchem.2019.19515.2190ENRifaatAbdel WahaabHead Sector, Research & Development (R & D), Holding Company for Water & Wastewater (HCWW)EnasAboutalebWater Pollution Control Department, National Research Center, Dokki, Cairo, Egypt0000-0002-5755-6275MahmoudSalemFaculty of Science, Damietta University, Damietta, EgyptOsamaAminHolding Company for Water and Wastewater, Nile Cornich , El-Sahel Rod El-Farag, Cairo
P.O.12676, Egypt.Journal Article20191115This study aimed to investigate the most effective treatment technique for the wastewater generated from food processing factory to be reused according to Egyptian standards. The discharged wastewater was highly polluted by organic load. As presented by average chemical oxygen demands (COD) value of 4950 mgO2L-1. Four treatment scenarios were investigated to select the most appropriate module for reuse of wastewater. Chemical coagulation-flocculation followed by adsorption onto granular activated carbon (GAC) achieved 84% of COD removal. The Fenton oxidation followed by adsorption onto GAC achieved COD removal of 91%.The Aerobic treatment followed by adsorption onto GAC reached to 92% COD removals. The quality of treated effluent using the previous modules was far less than the required values stated in Egyptian code for reuse in agriculture (Grade A). Integration of the studied different treatment modules in the form of sedimentation then chemical coagulation-flocculation followed by aerobic treatment then sandwich filter using adsorption/filtration (Sand/GAC/Sand) produced water quality complying with the Egyptian code for reuse in agriculture with COD removal of 99.8%.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Chemical Functionalization of Cellulose-Poly(Glycidyl-Methacrylate) Graft Copolymer with Two Different Poly Amino Compounds267326828863710.21608/ejchem.2020.26122.2522ENAhmed IbrahimWalyDepartment of Pre-Treatment and Finishing of Cellulosic Fibres, National Research
Centre, Cairo, Egypt.Maaly Abdel MoneimKhedrChemical Engineering Department, National Research Centre, Cairo, Egypt.Hanaa MohammedAliChemical Engineering Department, National Research Centre, Cairo, Egypt.IslamAhmedChemical Engineering Department, National Research Centre, Cairo, Egypt.Journal Article20200318<span>Two amino-functionalized cellulose-poly(glycidyl methacrylate) graft copolymers (AM-CPGMA), based on waste cotton fibers, were preparedby the aminization of selected</span><span> cellulose-poly(glycidyl methacrylate) graft copolymer (CPGMA) produced at best polymerization conditions using </span><span>diethylenetri-amine (DETA) and triethylenetetraamine (TETA)</span><span>. The different aminization parameters, namely the aminating agent/epoxy molar ratio, reaction time, liquor ratio, pHand temperature were investigated, and optimum reaction conditions were </span><span>established</span><span>. The </span><span>two prepared amino-functionalized cellulose-poly(glycidyl methacrylate) graft copolymers (AM-CPGMA) were characterized by the FT-IR, thermal gravimetric analysis (TGA), surface area measurement using Brunauer–Emmett–Teller (BET) and Barrett-Joyner-Halenda (BJH) theories and scanning electron microscope (SEM). Thus obtained results were compared with the native cellulose and its graft copolymer.</span>National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Tea Wastes as An Alternative Sustainable Raw Material for Ethanol Production268326976992810.21608/ejchem.2020.21785.2293ENDoaa A.R.MahmoudChemistry of Natural and Microbial Products Dept., Pharmaceutical and Drug Industries Research Div.National Research Centre, Dokki, Giza, Egypt P.O. Box: 12622Mousa A.AllamSpectroscopy Department, National Research CentreMohammad MohammadFaragBiomaterials Department, National Research CentreJournal Article20191231Integrating sustainability in life became an urgent necessity. Currently tea sectors play important role in adopting new technologies in order to reduce tea wastes .Collection of these wastes for production of ethanol will contribute to the improvement of life and the environment. Simple technique was proposed for saccharification of spent tea leaves either by cellulase or fermentation with baker's yeast. Scanning electron microscope analysis showed certain modification for the morphology of both green and black tea leaves. Brunauer Emmett Teller analysis confirmed the increment in surface area of both tea leaves. X- Ray Diffraction analysis proved the amorphous nature of their cellulose with little crystallinity. This nature eases their saccharification because cellulose is usually susceptible to degradation in its amorphous form. The percentage of produced ethanol was 74.4% from spent green tea leaves and 80.7% from spent black tea leaves after 24 h at mild temperature. The habit of drinking tea in Egypt shed the light on a promising approach relies on the production of ethanol from tea wastes especially spent tea leaves.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Using Nanotechnology in Bleaching Vegetable Oils269927067326410.21608/ejchem.2020.23625.2407ENRaniaAlmoselhyOils and Fats Technology Department - Food Technology Research Institute - Agricultural Research Center - EGYPT0000-0001-6314-6144MounirM. EidOils and Fats Technology Department - Food Technology Research Institute - Agricultural Research Center - EGYPTSusan M.M.Abd-ElmageedOils and Fats Technology Department - Food Technology Research Institute - Agricultural Research Center - EgyptRashaYounessspectra division, PhysicsJournal Article20200207The present study aimed to investigate the efficiency of nanotechnology in bleaching three important used Egyptian oils (soybean, corn and sunflower). The raw bleaching earth powder was milled for 10 h in a planetary ball mill. X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM) were used to investigate morphology, crystallite size, lattice strain and particle size of as-received and milled powders. The mechanical alloying process succeeded to obtain nano-sized bleaching earth powders after 10 h of milling and the morphology appeared rod with 46.6 nm in length and 4.46 nm in diameter. The milled nano-sized bleaching powder was used in bleaching of oils under study. Comparing color indices, peroxide values and spectral absorbencies at 232, 270 nm for the resulted bleached oils with the unbleached and control ones bleached with raw bleaching earth, it was concluded the high bleaching efficiency of nano-sized bleaching earth in reducing color indices, peroxide values and spectral absorbencies at 232, 270 nm.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Antimicrobial and UV protection finishing of Polysaccharide -Based Textiles using Biopolymer and AgNPs2707271610175210.21608/ejchem.2020.27968.2605ENMohamed A.RamadanPretreatment and Finishing of Cellulosic Fibers Department,
Textile Research Division, National Research Centre, P.O.12622, Dokki, Giza, Egypt0000-0002-4647-002XGhada M.TahaPretreatment and Finishing of Cellulosic Fibers Department,
Textile Research Division, National Research Centre, P.O.12622, Dokki, Giza, EgyptWalaa Zein EL-AbedinEL- MohrHome Economics Department (Clothes and Textile Branch) - Faculty of Specific Education - Tanta UniversityJournal Article20200421This article was concentrated on the preparation of antimicrobial and protective cellulosic fabrics based polysaccharides material by natural macromolecule and carbohydrate biopolymer such as chitosan. This study also addressed the application of nanotechnology in achieving this purpose using silver nanoparticles (AgNPs). Chitosan and AgNPs were also used in the treatment bath to improve some functional properties of these fabrics. Some investigations were performed for the treated fabrics such as ultra violet protection factor (UPF), contact angle, air permeability, water permeability, antimicrobial activity for four types of microbes namely Pseudomonas aerugenosa (P), Staphylococcus aureus (S), Aspergillus niger (A) and Candida albicans (C), tensile strength and elongation at break, scanning electron microscopy (SEM) and FT-IR. Cellulosic fabrics with three constructions were used in this research (Shibeka Hunycomb and Crepe). The results showed that fabrics treated with chitosan gave the best result for resistance to microbes and UPF and this led to reduction in air permeability and water absorbance regardless of the type of construction of the treated fabric. From the above, these fabrics can be used in the various purposes such as medical field and protection fabrics from UV rays.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Synthesis and Adsorption Study of some Chitosan Acid Derivatives as Dispersants for Ceramic Alumina Powders271727366602910.21608/ejchem.2019.15492.1940ENEmanAl-AllaqDepartment of Chemistry, University of Basrah, Basrah, IraqHadiAl-LamiDepartment of Chemistry
College of Science
University of Basrah0000-0001-8716-6385AliAl-MowaliDepartment of Chemistry, University of Basrah, Basrah, IraqJournal Article20190731The different functionality nature of Chitosan adds to its application as a preferable natural polymer not only for the recovery, separation, and concentration of metal ions, but for the fabrication of a wide spectrum of efficient materials, and opens a new window to act as a dispersant for ceramic particles in an aqueous medium; this is why the current study focused on getting Chitosan from chitin extracted from shrimp shells by known and modified chemical methods to obtain a high Degree of Deacetylation (DD) reached 93% to increase its solubility in dilute acidic aqueous medium. Three acid Chitosan derivatives were synthesized by grafting Chitosan chains with Glutaric, Pimelic, and Sebacic acids. The grafting process was checked by FTIR, which confirmed the compositions of the acid derivatives prepared as well as Chitosan...<br /> The ability of Chitosan and its derivatives to act as a dispersant for alumina ceramics powder was assessed by sedimentation and rheological techniques. The results showed that they have good power for deflocculating alumina particles, this implies that they may be good dispersant for ceramic processing in aqueous media which is the priority for ceramic manufacturers. <br /> The quantity of adsorbed dispersants, qe (mg/g), was determined by thermal gravimetric analysis, and hence the remaining concentration in equilibrium Ce (mg/L), four different types of adsorption isotherm models were determined and evaluated by calculating the variables and constants for each type and studying the behavior of polymers prepared toward each model. The S-shape curve was obtained from plotting qe vs Ce referring to that the adsorption follows BET isotherm of multi-layer where each layer obeys Langmuir-Freundlich isotherm.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Corrosion of Welded Carbon Steel Pipes in Oil Production Fields in Egypt273727496830310.21608/ejchem.2020.19176.2178ENMazen MahmoudMohamedCairo universityO.E.Abdel-SalamChemical Engineering Department, Cairo University, Giza, Egypt.Journal Article20191106In oil production fields, corrosion of welded carbon steel pipes frequently occurs in areas near welds. Corrosion in other areas may take place at a lower frequency and with a lower detrimental effect. In this paper, a field survey is conducted of eight oil petroleum fields over a period of seven years. Testing of specimens of carbon steel welded joints is carried out under simulated conditions. This study investigates the predominated corrosion damage mechanisms in welded carbon steel pipes. It examines the critical factors triggering corrosion mechanisms and the techniques for corrosion monitoring and mitigation. Flow-induced corrosion and preferential weld corrosion were found to be the most effective mechanisms compared to pitting and microbiologically induced corrosion. Detrimental factors of corrosion mechanisms include flow rates and changes in process parameters of pH, fluid resistivity, and some anion concentrations. The corrosion mitigation was achieved by increasing the dosage of injected corrosion inhibitors.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Characterization of New Coloured Materials on Different Fabrics and Application on Wool Fabrics to Comfort and Ultraviolet Protective Garment275122616721610.21608/ejchem.2020.19849.2199ENFatma ABassyouniNRC, cairo, EgyptKhaled MohamedSeddikNRC - Textile Division - clothing &amp; knitting industrial research department0000-0001-6202-3011Zienab M.ElgoryClothing &amp; Knitting Industrial Research Department, Textile Research Division, National Research Centre (NRC), Giza, 12622, EgyptLamiaa KamalEl-GabryNRC, Textile research division, proteinic and Man-made fibres departments0000-0002-6336-1554Journal Article20191120Fabrics treated with many chemicals and different technologies to give them good functional properties. In this study, new coloured materials were prepared and used for colouring and finishing fabrics in one step. Pyrimidine derivatives are compounds that have attracted much attention in recent years because of their broad spectrum of biological activities.We have synthesized various pyrimidine derivatives such as aminothioxopyrido (2,3-d) pyrimidine derivatives as coloured materials, which are used in dyeing different textile materials. The effect of the nature of various substituents on this type of pyrimidine derivatives as dye (new coloured materials) behavior has been studied on various types of textiles; all synthesized compounds were examined for their dyeing properties on different fabrics such as wool, acrylic, viscose and polyester fabrics. The chemical structures of the synthesized compound 1-3 have been elucidated by spectroscopic data analysis and are in good agreement with the proposed structures. Moreover, the colour strength was examined in detail. The colour strength of dyed textiles and the fastness of the compounds were determined. Wool fabrics got better dyeability than other fabrics. The effect of pH dyeing bath, dyeing temperature and dye concentration for the new coloured (amino-thioxopyrido (2,3-d) -pyrimidine derivatives) were studied.<br /> In addition, the effects of the properties of the new coloured materials on the performance of woolen garments were identified and some properties of coloured fabrics such as weight, thickness, roughness, air permeability, thermal insulation and bending modulus examined. The moisture transport property was measured by a wicking test in the vertical and horizontal directions. The treated fabric exhibited excellent ultraviolet protection without significant discrepancy in its inherent physico-mechanical properties. The effect of new dyes on the performance characteristics of woolen garments was evaluated using a radar chart.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Fabrication of H2S Gas Sensor Based on Ppy/CuO and Ppy/SnO2 Nanocomposites at Room Temperature276327746831510.21608/ejchem.2020.21041.2257ENKhalidKabelpetroleum applications department, egyptian petroleum research instituteAhmedAl-SabaghEgyptian petroleum research institute, Nasr city, Cairo, EgyptTamerShararaEgyptian Petroleum Research Institute, Cairo, EgyptAbdelfattah MohsenBadawiPetrochemicals Department, Egyptian Petroleum Research InstituteAdelAbdel-RahmanChemistry Department, Faculty of Science, Menoufia Univesrity
Dean of the facultyWalaaGadopetrochemicals department, Egyptian Petroleum Research InstituteJournal Article20191216The existence of Hydrogen sulfide (H2S) during the petroleum production and its high risks is the main reason to develop a smart, cheap and flexible device for H2S monitoring. This article is focusing on developing electrochemical sensors, which seems to have a promising potential. Polypyrrole (Ppy) and its two composites were prepared; Ppy doped with Cupper oxide (CuO) nanoparticles (Ppy/CuO) and Ppy doped with Tin oxide (SnO2) nanoparticles (Ppy/SnO2) via in-situ polymerization approach. The characterizations of these nanocomposites were confirmed by Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), Dynamic Light Scattering (DLS) and High-Resolution Transition Electron Microscopy (HR-TEM). The testing of these nanocomposites towards the monitoring of H2S gas at different concentrations was carried out in the term of electrical resistance changes. From the data; it was found that the response at 1000 ppm H2S gas concentration was ranked as; Ppy 0.12 %. Ppy/CuO 4.7 %. Ppy/SnO2 53.2 %.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Synthesis of Novel N- and C-acyclic Nucleosides Derived from 2-hydrazino-6-methyluracil277527816831910.21608/ejchem.2020.21459.2279ENHayam A.Abd El SalamGreen Chemistry Department, National Research Centre, 33 EL Bohouthst. (former EL Tahrirst.) – Dokki – Giza – Egypt - P.O.12622.0000-0003-3848-3450A.M.GaafarDepartment of Photochemistry,National Research Centre, 33 EL Bohouthst. (former EL Tahrirst.) – Dokki – Giza – Egypt - P.O.12622Journal Article20191225The reaction of 2-hydrazino-6-methyl uracil with different aldo- sugars yields the corresponding N-acyclic glycosides. However, some of them have cyclized successfully to form a new fused triazole ring. Apparently, such cyclization depends upon the Stereochemistry of the N-glycoside intermediates that produce the C-glycosides.”National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228563720200701Comparative Study between Polyaniline and The Grafted Polyaniline with Chitosan and Their Application in The Removal of Hexavalent Chromium278328026689510.21608/ejchem.2019.20096.2213ENEnasEl-FaramawyEl-Azhar UniversityRania MohamedSabryNational Research Center0000-0003-2875-4202Hanaa MohamedAliChemical engineering and pilot plant Dept. Engineering division, National research center, Dokki, Cairo, Egypt.0000-0003-2778-9868NaglaaMoursyEl-Azhar UniversityFatmaTaherAzhar UniversityJournal Article20191127The conductive polymer, polyaniline (PANI) and its grafting with chitosan (chitosan-grafted polyaniline, CS-g-PANI), were synthesized and analyzed by means of FTIR, TGA, TEM and XRD. The two resins were subjected for the adsorption of hexavalent chromium from aqueous solutions. The factors affecting the adsorption processes were tested, such as pH, time, temperature, and the initial concentrations of chromium. Also, both kinetics and equilibrium isotherm models were studied. The results indicated that the optimum conditions for the preparation of poly aniline are: APS to aniline ratio is 1.5, the HCL concentration is 2.5 M, the reaction time is 1.5 h and the optimum ratio for the preparation of CS-g-PANI is 1.2. It was also found that the prepared nanoparticles of PANI may reach a size of 23–32 nm and the CS-g-PANI is 26-37 nm. The adsorption of chromium VI by the two resins were found to follow Langmuire’s isotherm with maximum adsorption capacity of 526 mg/g for PANI and 370 mg/g for CS-g-PANI at 60 oC. The adsorption mechanism was found to follow the second order model for the two resins.